builder-next: enable more cache backends

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
Co-authored-by: Sebastiaan van Stijn <github@gone.nl>
Signed-off-by: Paweł Gronowski <pawel.gronowski@docker.com>

builder/builder-next/controller.go

@@ -26,8 +26,10 @@ import (
 	"github.com/moby/buildkit/cache"
 	"github.com/moby/buildkit/cache/metadata"
 	"github.com/moby/buildkit/cache/remotecache"
+	"github.com/moby/buildkit/cache/remotecache/gha"
 	inlineremotecache "github.com/moby/buildkit/cache/remotecache/inline"
 	localremotecache "github.com/moby/buildkit/cache/remotecache/local"
+	registryremotecache "github.com/moby/buildkit/cache/remotecache/registry"
 	"github.com/moby/buildkit/client"
 	bkconfig "github.com/moby/buildkit/cmd/buildkitd/config"
 	"github.com/moby/buildkit/control"
@@ -120,11 +122,15 @@ func newSnapshotterController(ctx context.Context, rt http.RoundTripper, opt Opt
 		Frontends:        frontends,
 		CacheKeyStorage:  cacheStorage,
 		ResolveCacheImporterFuncs: map[string]remotecache.ResolveCacheImporterFunc{
-			"registry": registryremotecache.ResolveCacheImporterFunc(opt.SessionManager, wo.ContentStore, opt.RegistryHosts),
+			"gha":      gha.ResolveCacheImporterFunc(),
 			"local":    localremotecache.ResolveCacheImporterFunc(opt.SessionManager),
+			"registry": registryremotecache.ResolveCacheImporterFunc(opt.SessionManager, wo.ContentStore, opt.RegistryHosts),
 		},
 		ResolveCacheExporterFuncs: map[string]remotecache.ResolveCacheExporterFunc{
-			"inline": inlineremotecache.ResolveCacheExporterFunc(),
+			"gha":      gha.ResolveCacheExporterFunc(),
+			"inline":   inlineremotecache.ResolveCacheExporterFunc(),
+			"local":    localremotecache.ResolveCacheExporterFunc(opt.SessionManager),
+			"registry": registryremotecache.ResolveCacheExporterFunc(opt.SessionManager, opt.RegistryHosts),
 		},
 		Entitlements:  getEntitlements(opt.BuilderConfig),
 		HistoryDB:     historyDB,

vendor.mod

@@ -123,6 +123,7 @@ require (
 	github.com/containerd/ttrpc v1.1.0 // indirect
 	github.com/containernetworking/cni v1.1.1 // indirect
 	github.com/cyphar/filepath-securejoin v0.2.3 // indirect
+	github.com/dimchansky/utfbom v1.1.1 // indirect
 	github.com/dustin/go-humanize v1.0.0 // indirect
 	github.com/felixge/httpsnoop v1.0.2 // indirect
 	github.com/fernet/fernet-go v0.0.0-20211208181803-9f70042a33ee // indirect
@@ -130,6 +131,7 @@ require (
 	github.com/go-logr/stdr v1.2.2 // indirect
 	github.com/gofrs/flock v0.8.1 // indirect
 	github.com/gogo/googleapis v1.4.1 // indirect
+	github.com/golang-jwt/jwt/v4 v4.4.2 // indirect
 	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
 	github.com/golang/protobuf v1.5.2 // indirect
 	github.com/google/btree v1.1.2 // indirect
@@ -160,6 +162,7 @@ require (
 	github.com/shibumi/go-pathspec v1.3.0 // indirect
 	github.com/spdx/tools-golang v0.3.1-0.20230104082527-d6f58551be3f // indirect
 	github.com/tinylib/msgp v1.1.6 // indirect
+	github.com/tonistiigi/go-actions-cache v0.0.0-20220404170428-0bdeb6e1eac7 // indirect
 	github.com/tonistiigi/units v0.0.0-20180711220420-6950e57a87ea // indirect
 	go.etcd.io/etcd/client/pkg/v3 v3.5.6 // indirect
 	go.etcd.io/etcd/pkg/v3 v3.5.6 // indirect

vendor/github.com/dimchansky/utfbom/.gitignore

@@ -0,0 +1,37 @@
+# Binaries for programs and plugins
+*.exe
+*.dll
+*.so
+*.dylib
+*.o
+*.a
+
+# Folders
+_obj
+_test
+
+# Architecture specific extensions/prefixes
+*.[568vq]
+[568vq].out
+
+*.cgo1.go
+*.cgo2.c
+_cgo_defun.c
+_cgo_gotypes.go
+_cgo_export.*
+
+_testmain.go
+
+*.prof
+
+# Test binary, build with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+# Project-local glide cache, RE: https://github.com/Masterminds/glide/issues/736
+.glide/
+
+# Gogland
+.idea/

vendor/github.com/dimchansky/utfbom/.travis.yml

@@ -0,0 +1,29 @@
+language: go
+sudo: false
+
+go:
+  - 1.10.x
+  - 1.11.x
+  - 1.12.x  
+  - 1.13.x
+  - 1.14.x
+  - 1.15.x
+
+cache:
+  directories:
+    - $HOME/.cache/go-build
+    - $HOME/gopath/pkg/mod
+
+env:
+  global:
+    - GO111MODULE=on
+
+before_install:
+  - go get github.com/mattn/goveralls
+  - go get golang.org/x/tools/cmd/cover
+  - go get golang.org/x/tools/cmd/goimports
+  - go get golang.org/x/lint/golint
+script:
+  - gofiles=$(find ./ -name '*.go') && [ -z "$gofiles" ] || unformatted=$(goimports -l $gofiles) && [ -z "$unformatted" ] || (echo >&2 "Go files must be formatted with gofmt. Following files has problem:\n $unformatted" && false)
+  - golint ./... # This won't break the build, just show warnings
+  - $HOME/gopath/bin/goveralls -service=travis-ci

vendor/github.com/dimchansky/utfbom/LICENSE

@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
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+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
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+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
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+      including but not limited to software source code, documentation
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+
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+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
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+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
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+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
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+      communication on electronic mailing lists, source code control systems,
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+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
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+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
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+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
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+      (b) You must cause any modified files to carry prominent notices
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+      (d) If the Work includes a "NOTICE" text file as part of its
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+          notices within Derivative Works that You distribute, alongside
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+          that such additional attribution notices cannot be construed
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+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "{}"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright (c) 2018-2020, Dmitrij Koniajev (dimchansky@gmail.com)
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

vendor/github.com/dimchansky/utfbom/README.md

@@ -0,0 +1,66 @@
+# utfbom [![Godoc](https://godoc.org/github.com/dimchansky/utfbom?status.png)](https://godoc.org/github.com/dimchansky/utfbom) [![License](https://img.shields.io/:license-apache-blue.svg)](https://opensource.org/licenses/Apache-2.0) [![Build Status](https://travis-ci.org/dimchansky/utfbom.svg?branch=master)](https://travis-ci.org/dimchansky/utfbom) [![Go Report Card](https://goreportcard.com/badge/github.com/dimchansky/utfbom)](https://goreportcard.com/report/github.com/dimchansky/utfbom) [![Coverage Status](https://coveralls.io/repos/github/dimchansky/utfbom/badge.svg?branch=master)](https://coveralls.io/github/dimchansky/utfbom?branch=master)
+
+The package utfbom implements the detection of the BOM (Unicode Byte Order Mark) and removing as necessary. It can also return the encoding detected by the BOM.
+
+## Installation
+
+    go get -u github.com/dimchansky/utfbom
+    
+## Example
+
+```go
+package main
+
+import (
+	"bytes"
+	"fmt"
+	"io/ioutil"
+
+	"github.com/dimchansky/utfbom"
+)
+
+func main() {
+	trySkip([]byte("\xEF\xBB\xBFhello"))
+	trySkip([]byte("hello"))
+}
+
+func trySkip(byteData []byte) {
+	fmt.Println("Input:", byteData)
+
+	// just skip BOM
+	output, err := ioutil.ReadAll(utfbom.SkipOnly(bytes.NewReader(byteData)))
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+	fmt.Println("ReadAll with BOM skipping", output)
+
+	// skip BOM and detect encoding
+	sr, enc := utfbom.Skip(bytes.NewReader(byteData))
+	fmt.Printf("Detected encoding: %s\n", enc)
+	output, err = ioutil.ReadAll(sr)
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+	fmt.Println("ReadAll with BOM detection and skipping", output)
+	fmt.Println()
+}
+```
+
+Output:
+
+```
+$ go run main.go
+Input: [239 187 191 104 101 108 108 111]
+ReadAll with BOM skipping [104 101 108 108 111]
+Detected encoding: UTF8
+ReadAll with BOM detection and skipping [104 101 108 108 111]
+
+Input: [104 101 108 108 111]
+ReadAll with BOM skipping [104 101 108 108 111]
+Detected encoding: Unknown
+ReadAll with BOM detection and skipping [104 101 108 108 111]
+```
+
+

vendor/github.com/dimchansky/utfbom/utfbom.go

@@ -0,0 +1,192 @@
+// Package utfbom implements the detection of the BOM (Unicode Byte Order Mark) and removing as necessary.
+// It wraps an io.Reader object, creating another object (Reader) that also implements the io.Reader
+// interface but provides automatic BOM checking and removing as necessary.
+package utfbom
+
+import (
+	"errors"
+	"io"
+)
+
+// Encoding is type alias for detected UTF encoding.
+type Encoding int
+
+// Constants to identify detected UTF encodings.
+const (
+	// Unknown encoding, returned when no BOM was detected
+	Unknown Encoding = iota
+
+	// UTF8, BOM bytes: EF BB BF
+	UTF8
+
+	// UTF-16, big-endian, BOM bytes: FE FF
+	UTF16BigEndian
+
+	// UTF-16, little-endian, BOM bytes: FF FE
+	UTF16LittleEndian
+
+	// UTF-32, big-endian, BOM bytes: 00 00 FE FF
+	UTF32BigEndian
+
+	// UTF-32, little-endian, BOM bytes: FF FE 00 00
+	UTF32LittleEndian
+)
+
+// String returns a user-friendly string representation of the encoding. Satisfies fmt.Stringer interface.
+func (e Encoding) String() string {
+	switch e {
+	case UTF8:
+		return "UTF8"
+	case UTF16BigEndian:
+		return "UTF16BigEndian"
+	case UTF16LittleEndian:
+		return "UTF16LittleEndian"
+	case UTF32BigEndian:
+		return "UTF32BigEndian"
+	case UTF32LittleEndian:
+		return "UTF32LittleEndian"
+	default:
+		return "Unknown"
+	}
+}
+
+const maxConsecutiveEmptyReads = 100
+
+// Skip creates Reader which automatically detects BOM (Unicode Byte Order Mark) and removes it as necessary.
+// It also returns the encoding detected by the BOM.
+// If the detected encoding is not needed, you can call the SkipOnly function.
+func Skip(rd io.Reader) (*Reader, Encoding) {
+	// Is it already a Reader?
+	b, ok := rd.(*Reader)
+	if ok {
+		return b, Unknown
+	}
+
+	enc, left, err := detectUtf(rd)
+	return &Reader{
+		rd:  rd,
+		buf: left,
+		err: err,
+	}, enc
+}
+
+// SkipOnly creates Reader which automatically detects BOM (Unicode Byte Order Mark) and removes it as necessary.
+func SkipOnly(rd io.Reader) *Reader {
+	r, _ := Skip(rd)
+	return r
+}
+
+// Reader implements automatic BOM (Unicode Byte Order Mark) checking and
+// removing as necessary for an io.Reader object.
+type Reader struct {
+	rd  io.Reader // reader provided by the client
+	buf []byte    // buffered data
+	err error     // last error
+}
+
+// Read is an implementation of io.Reader interface.
+// The bytes are taken from the underlying Reader, but it checks for BOMs, removing them as necessary.
+func (r *Reader) Read(p []byte) (n int, err error) {
+	if len(p) == 0 {
+		return 0, nil
+	}
+
+	if r.buf == nil {
+		if r.err != nil {
+			return 0, r.readErr()
+		}
+
+		return r.rd.Read(p)
+	}
+
+	// copy as much as we can
+	n = copy(p, r.buf)
+	r.buf = nilIfEmpty(r.buf[n:])
+	return n, nil
+}
+
+func (r *Reader) readErr() error {
+	err := r.err
+	r.err = nil
+	return err
+}
+
+var errNegativeRead = errors.New("utfbom: reader returned negative count from Read")
+
+func detectUtf(rd io.Reader) (enc Encoding, buf []byte, err error) {
+	buf, err = readBOM(rd)
+
+	if len(buf) >= 4 {
+		if isUTF32BigEndianBOM4(buf) {
+			return UTF32BigEndian, nilIfEmpty(buf[4:]), err
+		}
+		if isUTF32LittleEndianBOM4(buf) {
+			return UTF32LittleEndian, nilIfEmpty(buf[4:]), err
+		}
+	}
+
+	if len(buf) > 2 && isUTF8BOM3(buf) {
+		return UTF8, nilIfEmpty(buf[3:]), err
+	}
+
+	if (err != nil && err != io.EOF) || (len(buf) < 2) {
+		return Unknown, nilIfEmpty(buf), err
+	}
+
+	if isUTF16BigEndianBOM2(buf) {
+		return UTF16BigEndian, nilIfEmpty(buf[2:]), err
+	}
+	if isUTF16LittleEndianBOM2(buf) {
+		return UTF16LittleEndian, nilIfEmpty(buf[2:]), err
+	}
+
+	return Unknown, nilIfEmpty(buf), err
+}
+
+func readBOM(rd io.Reader) (buf []byte, err error) {
+	const maxBOMSize = 4
+	var bom [maxBOMSize]byte // used to read BOM
+
+	// read as many bytes as possible
+	for nEmpty, n := 0, 0; err == nil && len(buf) < maxBOMSize; buf = bom[:len(buf)+n] {
+		if n, err = rd.Read(bom[len(buf):]); n < 0 {
+			panic(errNegativeRead)
+		}
+		if n > 0 {
+			nEmpty = 0
+		} else {
+			nEmpty++
+			if nEmpty >= maxConsecutiveEmptyReads {
+				err = io.ErrNoProgress
+			}
+		}
+	}
+	return
+}
+
+func isUTF32BigEndianBOM4(buf []byte) bool {
+	return buf[0] == 0x00 && buf[1] == 0x00 && buf[2] == 0xFE && buf[3] == 0xFF
+}
+
+func isUTF32LittleEndianBOM4(buf []byte) bool {
+	return buf[0] == 0xFF && buf[1] == 0xFE && buf[2] == 0x00 && buf[3] == 0x00
+}
+
+func isUTF8BOM3(buf []byte) bool {
+	return buf[0] == 0xEF && buf[1] == 0xBB && buf[2] == 0xBF
+}
+
+func isUTF16BigEndianBOM2(buf []byte) bool {
+	return buf[0] == 0xFE && buf[1] == 0xFF
+}
+
+func isUTF16LittleEndianBOM2(buf []byte) bool {
+	return buf[0] == 0xFF && buf[1] == 0xFE
+}
+
+func nilIfEmpty(buf []byte) (res []byte) {
+	if len(buf) > 0 {
+		res = buf
+	}
+	return
+}

vendor/github.com/golang-jwt/jwt/v4/.gitignore

@@ -0,0 +1,4 @@
+.DS_Store
+bin
+.idea/
+

vendor/github.com/golang-jwt/jwt/v4/LICENSE

@@ -0,0 +1,9 @@
+Copyright (c) 2012 Dave Grijalva
+Copyright (c) 2021 golang-jwt maintainers
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+

vendor/github.com/golang-jwt/jwt/v4/MIGRATION_GUIDE.md

@@ -0,0 +1,22 @@
+## Migration Guide (v4.0.0)
+
+Starting from [v4.0.0](https://github.com/golang-jwt/jwt/releases/tag/v4.0.0), the import path will be:
+
+    "github.com/golang-jwt/jwt/v4"
+
+The `/v4` version will be backwards compatible with existing `v3.x.y` tags in this repo, as well as 
+`github.com/dgrijalva/jwt-go`. For most users this should be a drop-in replacement, if you're having 
+troubles migrating, please open an issue.
+
+You can replace all occurrences of `github.com/dgrijalva/jwt-go` or `github.com/golang-jwt/jwt` with `github.com/golang-jwt/jwt/v4`, either manually or by using tools such as `sed` or `gofmt`.
+
+And then you'd typically run:
+
+```
+go get github.com/golang-jwt/jwt/v4
+go mod tidy
+```
+
+## Older releases (before v3.2.0)
+
+The original migration guide for older releases can be found at https://github.com/dgrijalva/jwt-go/blob/master/MIGRATION_GUIDE.md.

vendor/github.com/golang-jwt/jwt/v4/README.md

@@ -0,0 +1,138 @@
+# jwt-go
+
+[![build](https://github.com/golang-jwt/jwt/actions/workflows/build.yml/badge.svg)](https://github.com/golang-jwt/jwt/actions/workflows/build.yml)
+[![Go Reference](https://pkg.go.dev/badge/github.com/golang-jwt/jwt/v4.svg)](https://pkg.go.dev/github.com/golang-jwt/jwt/v4)
+
+A [go](http://www.golang.org) (or 'golang' for search engine friendliness) implementation of [JSON Web Tokens](https://datatracker.ietf.org/doc/html/rfc7519).
+
+Starting with [v4.0.0](https://github.com/golang-jwt/jwt/releases/tag/v4.0.0) this project adds Go module support, but maintains backwards compatibility with older `v3.x.y` tags and upstream `github.com/dgrijalva/jwt-go`.
+See the [`MIGRATION_GUIDE.md`](./MIGRATION_GUIDE.md) for more information.
+
+> After the original author of the library suggested migrating the maintenance of `jwt-go`, a dedicated team of open source maintainers decided to clone the existing library into this repository. See [dgrijalva/jwt-go#462](https://github.com/dgrijalva/jwt-go/issues/462) for a detailed discussion on this topic.
+
+
+**SECURITY NOTICE:** Some older versions of Go have a security issue in the crypto/elliptic. Recommendation is to upgrade to at least 1.15 See issue [dgrijalva/jwt-go#216](https://github.com/dgrijalva/jwt-go/issues/216) for more detail.
+
+**SECURITY NOTICE:** It's important that you [validate the `alg` presented is what you expect](https://auth0.com/blog/critical-vulnerabilities-in-json-web-token-libraries/). This library attempts to make it easy to do the right thing by requiring key types match the expected alg, but you should take the extra step to verify it in your usage.  See the examples provided.
+
+### Supported Go versions
+
+Our support of Go versions is aligned with Go's [version release policy](https://golang.org/doc/devel/release#policy).
+So we will support a major version of Go until there are two newer major releases.
+We no longer support building jwt-go with unsupported Go versions, as these contain security vulnerabilities
+which will not be fixed.
+
+## What the heck is a JWT?
+
+JWT.io has [a great introduction](https://jwt.io/introduction) to JSON Web Tokens.
+
+In short, it's a signed JSON object that does something useful (for example, authentication).  It's commonly used for `Bearer` tokens in Oauth 2.  A token is made of three parts, separated by `.`'s.  The first two parts are JSON objects, that have been [base64url](https://datatracker.ietf.org/doc/html/rfc4648) encoded.  The last part is the signature, encoded the same way.
+
+The first part is called the header.  It contains the necessary information for verifying the last part, the signature.  For example, which encryption method was used for signing and what key was used.
+
+The part in the middle is the interesting bit.  It's called the Claims and contains the actual stuff you care about.  Refer to [RFC 7519](https://datatracker.ietf.org/doc/html/rfc7519) for information about reserved keys and the proper way to add your own.
+
+## What's in the box?
+
+This library supports the parsing and verification as well as the generation and signing of JWTs.  Current supported signing algorithms are HMAC SHA, RSA, RSA-PSS, and ECDSA, though hooks are present for adding your own.
+
+## Installation Guidelines
+
+1. To install the jwt package, you first need to have [Go](https://go.dev/doc/install) installed, then you can use the command below to add `jwt-go` as a dependency in your Go program.
+
+```sh
+go get -u github.com/golang-jwt/jwt/v4
+```
+
+2. Import it in your code:
+
+```go
+import "github.com/golang-jwt/jwt/v4"
+```
+
+## Examples
+
+See [the project documentation](https://pkg.go.dev/github.com/golang-jwt/jwt/v4) for examples of usage:
+
+* [Simple example of parsing and validating a token](https://pkg.go.dev/github.com/golang-jwt/jwt#example-Parse-Hmac)
+* [Simple example of building and signing a token](https://pkg.go.dev/github.com/golang-jwt/jwt#example-New-Hmac)
+* [Directory of Examples](https://pkg.go.dev/github.com/golang-jwt/jwt#pkg-examples)
+
+## Extensions
+
+This library publishes all the necessary components for adding your own signing methods or key functions.  Simply implement the `SigningMethod` interface and register a factory method using `RegisterSigningMethod` or provide a `jwt.Keyfunc`.
+
+A common use case would be integrating with different 3rd party signature providers, like key management services from various cloud providers or Hardware Security Modules (HSMs) or to implement additional standards.
+
+| Extension | Purpose                                                                                                  | Repo                                       |
+| --------- | -------------------------------------------------------------------------------------------------------- | ------------------------------------------ |
+| GCP       | Integrates with multiple Google Cloud Platform signing tools (AppEngine, IAM API, Cloud KMS)             | https://github.com/someone1/gcp-jwt-go     |
+| AWS       | Integrates with AWS Key Management Service, KMS                                                          | https://github.com/matelang/jwt-go-aws-kms |
+| JWKS      | Provides support for JWKS ([RFC 7517](https://datatracker.ietf.org/doc/html/rfc7517)) as a `jwt.Keyfunc` | https://github.com/MicahParks/keyfunc       |
+
+*Disclaimer*: Unless otherwise specified, these integrations are maintained by third parties and should not be considered as a primary offer by any of the mentioned cloud providers
+
+## Compliance
+
+This library was last reviewed to comply with [RFC 7519](https://datatracker.ietf.org/doc/html/rfc7519) dated May 2015 with a few notable differences:
+
+* In order to protect against accidental use of [Unsecured JWTs](https://datatracker.ietf.org/doc/html/rfc7519#section-6), tokens using `alg=none` will only be accepted if the constant `jwt.UnsafeAllowNoneSignatureType` is provided as the key.
+
+## Project Status & Versioning
+
+This library is considered production ready.  Feedback and feature requests are appreciated.  The API should be considered stable.  There should be very few backwards-incompatible changes outside of major version updates (and only with good reason).
+
+This project uses [Semantic Versioning 2.0.0](http://semver.org).  Accepted pull requests will land on `main`.  Periodically, versions will be tagged from `main`.  You can find all the releases on [the project releases page](https://github.com/golang-jwt/jwt/releases).
+
+**BREAKING CHANGES:*** 
+A full list of breaking changes is available in `VERSION_HISTORY.md`.  See `MIGRATION_GUIDE.md` for more information on updating your code.
+
+## Usage Tips
+
+### Signing vs Encryption
+
+A token is simply a JSON object that is signed by its author. this tells you exactly two things about the data:
+
+* The author of the token was in the possession of the signing secret
+* The data has not been modified since it was signed
+
+It's important to know that JWT does not provide encryption, which means anyone who has access to the token can read its contents. If you need to protect (encrypt) the data, there is a companion spec, `JWE`, that provides this functionality. JWE is currently outside the scope of this library.
+
+### Choosing a Signing Method
+
+There are several signing methods available, and you should probably take the time to learn about the various options before choosing one.  The principal design decision is most likely going to be symmetric vs asymmetric.
+
+Symmetric signing methods, such as HSA, use only a single secret. This is probably the simplest signing method to use since any `[]byte` can be used as a valid secret. They are also slightly computationally faster to use, though this rarely is enough to matter. Symmetric signing methods work the best when both producers and consumers of tokens are trusted, or even the same system. Since the same secret is used to both sign and validate tokens, you can't easily distribute the key for validation.
+
+Asymmetric signing methods, such as RSA, use different keys for signing and verifying tokens. This makes it possible to produce tokens with a private key, and allow any consumer to access the public key for verification.
+
+### Signing Methods and Key Types
+
+Each signing method expects a different object type for its signing keys. See the package documentation for details. Here are the most common ones:
+
+* The [HMAC signing method](https://pkg.go.dev/github.com/golang-jwt/jwt#SigningMethodHMAC) (`HS256`,`HS384`,`HS512`) expect `[]byte` values for signing and validation
+* The [RSA signing method](https://pkg.go.dev/github.com/golang-jwt/jwt#SigningMethodRSA) (`RS256`,`RS384`,`RS512`) expect `*rsa.PrivateKey` for signing and `*rsa.PublicKey` for validation
+* The [ECDSA signing method](https://pkg.go.dev/github.com/golang-jwt/jwt#SigningMethodECDSA) (`ES256`,`ES384`,`ES512`) expect `*ecdsa.PrivateKey` for signing and `*ecdsa.PublicKey` for validation
+* The [EdDSA signing method](https://pkg.go.dev/github.com/golang-jwt/jwt#SigningMethodEd25519) (`Ed25519`) expect `ed25519.PrivateKey` for signing and `ed25519.PublicKey` for validation
+
+### JWT and OAuth
+
+It's worth mentioning that OAuth and JWT are not the same thing. A JWT token is simply a signed JSON object. It can be used anywhere such a thing is useful. There is some confusion, though, as JWT is the most common type of bearer token used in OAuth2 authentication.
+
+Without going too far down the rabbit hole, here's a description of the interaction of these technologies:
+
+* OAuth is a protocol for allowing an identity provider to be separate from the service a user is logging in to. For example, whenever you use Facebook to log into a different service (Yelp, Spotify, etc), you are using OAuth.
+* OAuth defines several options for passing around authentication data. One popular method is called a "bearer token". A bearer token is simply a string that _should_ only be held by an authenticated user. Thus, simply presenting this token proves your identity. You can probably derive from here why a JWT might make a good bearer token.
+* Because bearer tokens are used for authentication, it's important they're kept secret. This is why transactions that use bearer tokens typically happen over SSL.
+
+### Troubleshooting
+
+This library uses descriptive error messages whenever possible. If you are not getting the expected result, have a look at the errors. The most common place people get stuck is providing the correct type of key to the parser. See the above section on signing methods and key types.
+
+## More
+
+Documentation can be found [on pkg.go.dev](https://pkg.go.dev/github.com/golang-jwt/jwt).
+
+The command line utility included in this project (cmd/jwt) provides a straightforward example of token creation and parsing as well as a useful tool for debugging your own integration. You'll also find several implementation examples in the documentation.
+
+[golang-jwt](https://github.com/orgs/golang-jwt) incorporates a modified version of the JWT logo, which is distributed under the terms of the [MIT License](https://github.com/jsonwebtoken/jsonwebtoken.github.io/blob/master/LICENSE.txt).

vendor/github.com/golang-jwt/jwt/v4/SECURITY.md

@@ -0,0 +1,19 @@
+# Security Policy
+
+## Supported Versions
+
+As of February 2022 (and until this document is updated), the latest version `v4` is supported.
+
+## Reporting a Vulnerability
+
+If you think you found a vulnerability, and even if you are not sure, please report it to jwt-go-security@googlegroups.com or one of the other [golang-jwt maintainers](https://github.com/orgs/golang-jwt/people). Please try be explicit, describe steps to reproduce the security issue with code example(s).
+
+You will receive a response within a timely manner. If the issue is confirmed, we will do our best to release a patch as soon as possible given the complexity of the problem.
+
+## Public Discussions
+
+Please avoid publicly discussing a potential security vulnerability.
+
+Let's take this offline and find a solution first, this limits the potential impact as much as possible.
+
+We appreciate your help!

vendor/github.com/golang-jwt/jwt/v4/VERSION_HISTORY.md

@@ -0,0 +1,135 @@
+## `jwt-go` Version History
+
+#### 4.0.0
+
+* Introduces support for Go modules. The `v4` version will be backwards compatible with `v3.x.y`.
+
+#### 3.2.2
+
+* Starting from this release, we are adopting the policy to support the most 2 recent versions of Go currently available. By the time of this release, this is Go 1.15 and 1.16 ([#28](https://github.com/golang-jwt/jwt/pull/28)).
+* Fixed a potential issue that could occur when the verification of `exp`, `iat` or `nbf` was not required and contained invalid contents, i.e. non-numeric/date. Thanks for @thaJeztah for making us aware of that and @giorgos-f3 for originally reporting it to the formtech fork ([#40](https://github.com/golang-jwt/jwt/pull/40)).
+* Added support for EdDSA / ED25519 ([#36](https://github.com/golang-jwt/jwt/pull/36)).
+* Optimized allocations ([#33](https://github.com/golang-jwt/jwt/pull/33)).
+
+#### 3.2.1
+
+* **Import Path Change**: See MIGRATION_GUIDE.md for tips on updating your code
+	* Changed the import path from `github.com/dgrijalva/jwt-go` to `github.com/golang-jwt/jwt`
+* Fixed type confusing issue between `string` and `[]string` in `VerifyAudience` ([#12](https://github.com/golang-jwt/jwt/pull/12)). This fixes CVE-2020-26160 
+
+#### 3.2.0
+
+* Added method `ParseUnverified` to allow users to split up the tasks of parsing and validation
+* HMAC signing method returns `ErrInvalidKeyType` instead of `ErrInvalidKey` where appropriate
+* Added options to `request.ParseFromRequest`, which allows for an arbitrary list of modifiers to parsing behavior. Initial set include `WithClaims` and `WithParser`. Existing usage of this function will continue to work as before.
+* Deprecated `ParseFromRequestWithClaims` to simplify API in the future.
+
+#### 3.1.0
+
+* Improvements to `jwt` command line tool
+* Added `SkipClaimsValidation` option to `Parser`
+* Documentation updates
+
+#### 3.0.0
+
+* **Compatibility Breaking Changes**: See MIGRATION_GUIDE.md for tips on updating your code
+	* Dropped support for `[]byte` keys when using RSA signing methods.  This convenience feature could contribute to security vulnerabilities involving mismatched key types with signing methods.
+	* `ParseFromRequest` has been moved to `request` subpackage and usage has changed
+	* The `Claims` property on `Token` is now type `Claims` instead of `map[string]interface{}`.  The default value is type `MapClaims`, which is an alias to `map[string]interface{}`.  This makes it possible to use a custom type when decoding claims.
+* Other Additions and Changes
+	* Added `Claims` interface type to allow users to decode the claims into a custom type
+	* Added `ParseWithClaims`, which takes a third argument of type `Claims`.  Use this function instead of `Parse` if you have a custom type you'd like to decode into.
+	* Dramatically improved the functionality and flexibility of `ParseFromRequest`, which is now in the `request` subpackage
+	* Added `ParseFromRequestWithClaims` which is the `FromRequest` equivalent of `ParseWithClaims`
+	* Added new interface type `Extractor`, which is used for extracting JWT strings from http requests.  Used with `ParseFromRequest` and `ParseFromRequestWithClaims`.
+	* Added several new, more specific, validation errors to error type bitmask
+	* Moved examples from README to executable example files
+	* Signing method registry is now thread safe
+	* Added new property to `ValidationError`, which contains the raw error returned by calls made by parse/verify (such as those returned by keyfunc or json parser)
+
+#### 2.7.0
+
+This will likely be the last backwards compatible release before 3.0.0, excluding essential bug fixes.
+
+* Added new option `-show` to the `jwt` command that will just output the decoded token without verifying
+* Error text for expired tokens includes how long it's been expired
+* Fixed incorrect error returned from `ParseRSAPublicKeyFromPEM`
+* Documentation updates
+
+#### 2.6.0
+
+* Exposed inner error within ValidationError
+* Fixed validation errors when using UseJSONNumber flag
+* Added several unit tests
+
+#### 2.5.0
+
+* Added support for signing method none.  You shouldn't use this.  The API tries to make this clear.
+* Updated/fixed some documentation
+* Added more helpful error message when trying to parse tokens that begin with `BEARER `
+
+#### 2.4.0
+
+* Added new type, Parser, to allow for configuration of various parsing parameters
+	* You can now specify a list of valid signing methods.  Anything outside this set will be rejected.
+	* You can now opt to use the `json.Number` type instead of `float64` when parsing token JSON
+* Added support for [Travis CI](https://travis-ci.org/dgrijalva/jwt-go)
+* Fixed some bugs with ECDSA parsing
+
+#### 2.3.0
+
+* Added support for ECDSA signing methods
+* Added support for RSA PSS signing methods (requires go v1.4)
+
+#### 2.2.0
+
+* Gracefully handle a `nil` `Keyfunc` being passed to `Parse`.  Result will now be the parsed token and an error, instead of a panic.
+
+#### 2.1.0
+
+Backwards compatible API change that was missed in 2.0.0.
+
+* The `SignedString` method on `Token` now takes `interface{}` instead of `[]byte`
+
+#### 2.0.0
+
+There were two major reasons for breaking backwards compatibility with this update.  The first was a refactor required to expand the width of the RSA and HMAC-SHA signing implementations.  There will likely be no required code changes to support this change.
+
+The second update, while unfortunately requiring a small change in integration, is required to open up this library to other signing methods.  Not all keys used for all signing methods have a single standard on-disk representation.  Requiring `[]byte` as the type for all keys proved too limiting.  Additionally, this implementation allows for pre-parsed tokens to be reused, which might matter in an application that parses a high volume of tokens with a small set of keys.  Backwards compatibilty has been maintained for passing `[]byte` to the RSA signing methods, but they will also accept `*rsa.PublicKey` and `*rsa.PrivateKey`.
+
+It is likely the only integration change required here will be to change `func(t *jwt.Token) ([]byte, error)` to `func(t *jwt.Token) (interface{}, error)` when calling `Parse`.
+
+* **Compatibility Breaking Changes**
+	* `SigningMethodHS256` is now `*SigningMethodHMAC` instead of `type struct`
+	* `SigningMethodRS256` is now `*SigningMethodRSA` instead of `type struct`
+	* `KeyFunc` now returns `interface{}` instead of `[]byte`
+	* `SigningMethod.Sign` now takes `interface{}` instead of `[]byte` for the key
+	* `SigningMethod.Verify` now takes `interface{}` instead of `[]byte` for the key
+* Renamed type `SigningMethodHS256` to `SigningMethodHMAC`.  Specific sizes are now just instances of this type.
+    * Added public package global `SigningMethodHS256`
+    * Added public package global `SigningMethodHS384`
+    * Added public package global `SigningMethodHS512`
+* Renamed type `SigningMethodRS256` to `SigningMethodRSA`.  Specific sizes are now just instances of this type.
+    * Added public package global `SigningMethodRS256`
+    * Added public package global `SigningMethodRS384`
+    * Added public package global `SigningMethodRS512`
+* Moved sample private key for HMAC tests from an inline value to a file on disk.  Value is unchanged.
+* Refactored the RSA implementation to be easier to read
+* Exposed helper methods `ParseRSAPrivateKeyFromPEM` and `ParseRSAPublicKeyFromPEM`
+
+#### 1.0.2
+
+* Fixed bug in parsing public keys from certificates
+* Added more tests around the parsing of keys for RS256
+* Code refactoring in RS256 implementation.  No functional changes
+
+#### 1.0.1
+
+* Fixed panic if RS256 signing method was passed an invalid key
+
+#### 1.0.0
+
+* First versioned release
+* API stabilized
+* Supports creating, signing, parsing, and validating JWT tokens
+* Supports RS256 and HS256 signing methods

vendor/github.com/golang-jwt/jwt/v4/claims.go

@@ -0,0 +1,273 @@
+package jwt
+
+import (
+	"crypto/subtle"
+	"fmt"
+	"time"
+)
+
+// Claims must just have a Valid method that determines
+// if the token is invalid for any supported reason
+type Claims interface {
+	Valid() error
+}
+
+// RegisteredClaims are a structured version of the JWT Claims Set,
+// restricted to Registered Claim Names, as referenced at
+// https://datatracker.ietf.org/doc/html/rfc7519#section-4.1
+//
+// This type can be used on its own, but then additional private and
+// public claims embedded in the JWT will not be parsed. The typical usecase
+// therefore is to embedded this in a user-defined claim type.
+//
+// See examples for how to use this with your own claim types.
+type RegisteredClaims struct {
+	// the `iss` (Issuer) claim. See https://datatracker.ietf.org/doc/html/rfc7519#section-4.1.1
+	Issuer string `json:"iss,omitempty"`
+
+	// the `sub` (Subject) claim. See https://datatracker.ietf.org/doc/html/rfc7519#section-4.1.2
+	Subject string `json:"sub,omitempty"`
+
+	// the `aud` (Audience) claim. See https://datatracker.ietf.org/doc/html/rfc7519#section-4.1.3
+	Audience ClaimStrings `json:"aud,omitempty"`
+
+	// the `exp` (Expiration Time) claim. See https://datatracker.ietf.org/doc/html/rfc7519#section-4.1.4
+	ExpiresAt *NumericDate `json:"exp,omitempty"`
+
+	// the `nbf` (Not Before) claim. See https://datatracker.ietf.org/doc/html/rfc7519#section-4.1.5
+	NotBefore *NumericDate `json:"nbf,omitempty"`
+
+	// the `iat` (Issued At) claim. See https://datatracker.ietf.org/doc/html/rfc7519#section-4.1.6
+	IssuedAt *NumericDate `json:"iat,omitempty"`
+
+	// the `jti` (JWT ID) claim. See https://datatracker.ietf.org/doc/html/rfc7519#section-4.1.7
+	ID string `json:"jti,omitempty"`
+}
+
+// Valid validates time based claims "exp, iat, nbf".
+// There is no accounting for clock skew.
+// As well, if any of the above claims are not in the token, it will still
+// be considered a valid claim.
+func (c RegisteredClaims) Valid() error {
+	vErr := new(ValidationError)
+	now := TimeFunc()
+
+	// The claims below are optional, by default, so if they are set to the
+	// default value in Go, let's not fail the verification for them.
+	if !c.VerifyExpiresAt(now, false) {
+		delta := now.Sub(c.ExpiresAt.Time)
+		vErr.Inner = fmt.Errorf("%s by %s", ErrTokenExpired, delta)
+		vErr.Errors |= ValidationErrorExpired
+	}
+
+	if !c.VerifyIssuedAt(now, false) {
+		vErr.Inner = ErrTokenUsedBeforeIssued
+		vErr.Errors |= ValidationErrorIssuedAt
+	}
+
+	if !c.VerifyNotBefore(now, false) {
+		vErr.Inner = ErrTokenNotValidYet
+		vErr.Errors |= ValidationErrorNotValidYet
+	}
+
+	if vErr.valid() {
+		return nil
+	}
+
+	return vErr
+}
+
+// VerifyAudience compares the aud claim against cmp.
+// If required is false, this method will return true if the value matches or is unset
+func (c *RegisteredClaims) VerifyAudience(cmp string, req bool) bool {
+	return verifyAud(c.Audience, cmp, req)
+}
+
+// VerifyExpiresAt compares the exp claim against cmp (cmp < exp).
+// If req is false, it will return true, if exp is unset.
+func (c *RegisteredClaims) VerifyExpiresAt(cmp time.Time, req bool) bool {
+	if c.ExpiresAt == nil {
+		return verifyExp(nil, cmp, req)
+	}
+
+	return verifyExp(&c.ExpiresAt.Time, cmp, req)
+}
+
+// VerifyIssuedAt compares the iat claim against cmp (cmp >= iat).
+// If req is false, it will return true, if iat is unset.
+func (c *RegisteredClaims) VerifyIssuedAt(cmp time.Time, req bool) bool {
+	if c.IssuedAt == nil {
+		return verifyIat(nil, cmp, req)
+	}
+
+	return verifyIat(&c.IssuedAt.Time, cmp, req)
+}
+
+// VerifyNotBefore compares the nbf claim against cmp (cmp >= nbf).
+// If req is false, it will return true, if nbf is unset.
+func (c *RegisteredClaims) VerifyNotBefore(cmp time.Time, req bool) bool {
+	if c.NotBefore == nil {
+		return verifyNbf(nil, cmp, req)
+	}
+
+	return verifyNbf(&c.NotBefore.Time, cmp, req)
+}
+
+// VerifyIssuer compares the iss claim against cmp.
+// If required is false, this method will return true if the value matches or is unset
+func (c *RegisteredClaims) VerifyIssuer(cmp string, req bool) bool {
+	return verifyIss(c.Issuer, cmp, req)
+}
+
+// StandardClaims are a structured version of the JWT Claims Set, as referenced at
+// https://datatracker.ietf.org/doc/html/rfc7519#section-4. They do not follow the
+// specification exactly, since they were based on an earlier draft of the
+// specification and not updated. The main difference is that they only
+// support integer-based date fields and singular audiences. This might lead to
+// incompatibilities with other JWT implementations. The use of this is discouraged, instead
+// the newer RegisteredClaims struct should be used.
+//
+// Deprecated: Use RegisteredClaims instead for a forward-compatible way to access registered claims in a struct.
+type StandardClaims struct {
+	Audience  string `json:"aud,omitempty"`
+	ExpiresAt int64  `json:"exp,omitempty"`
+	Id        string `json:"jti,omitempty"`
+	IssuedAt  int64  `json:"iat,omitempty"`
+	Issuer    string `json:"iss,omitempty"`
+	NotBefore int64  `json:"nbf,omitempty"`
+	Subject   string `json:"sub,omitempty"`
+}
+
+// Valid validates time based claims "exp, iat, nbf". There is no accounting for clock skew.
+// As well, if any of the above claims are not in the token, it will still
+// be considered a valid claim.
+func (c StandardClaims) Valid() error {
+	vErr := new(ValidationError)
+	now := TimeFunc().Unix()
+
+	// The claims below are optional, by default, so if they are set to the
+	// default value in Go, let's not fail the verification for them.
+	if !c.VerifyExpiresAt(now, false) {
+		delta := time.Unix(now, 0).Sub(time.Unix(c.ExpiresAt, 0))
+		vErr.Inner = fmt.Errorf("%s by %s", ErrTokenExpired, delta)
+		vErr.Errors |= ValidationErrorExpired
+	}
+
+	if !c.VerifyIssuedAt(now, false) {
+		vErr.Inner = ErrTokenUsedBeforeIssued
+		vErr.Errors |= ValidationErrorIssuedAt
+	}
+
+	if !c.VerifyNotBefore(now, false) {
+		vErr.Inner = ErrTokenNotValidYet
+		vErr.Errors |= ValidationErrorNotValidYet
+	}
+
+	if vErr.valid() {
+		return nil
+	}
+
+	return vErr
+}
+
+// VerifyAudience compares the aud claim against cmp.
+// If required is false, this method will return true if the value matches or is unset
+func (c *StandardClaims) VerifyAudience(cmp string, req bool) bool {
+	return verifyAud([]string{c.Audience}, cmp, req)
+}
+
+// VerifyExpiresAt compares the exp claim against cmp (cmp < exp).
+// If req is false, it will return true, if exp is unset.
+func (c *StandardClaims) VerifyExpiresAt(cmp int64, req bool) bool {
+	if c.ExpiresAt == 0 {
+		return verifyExp(nil, time.Unix(cmp, 0), req)
+	}
+
+	t := time.Unix(c.ExpiresAt, 0)
+	return verifyExp(&t, time.Unix(cmp, 0), req)
+}
+
+// VerifyIssuedAt compares the iat claim against cmp (cmp >= iat).
+// If req is false, it will return true, if iat is unset.
+func (c *StandardClaims) VerifyIssuedAt(cmp int64, req bool) bool {
+	if c.IssuedAt == 0 {
+		return verifyIat(nil, time.Unix(cmp, 0), req)
+	}
+
+	t := time.Unix(c.IssuedAt, 0)
+	return verifyIat(&t, time.Unix(cmp, 0), req)
+}
+
+// VerifyNotBefore compares the nbf claim against cmp (cmp >= nbf).
+// If req is false, it will return true, if nbf is unset.
+func (c *StandardClaims) VerifyNotBefore(cmp int64, req bool) bool {
+	if c.NotBefore == 0 {
+		return verifyNbf(nil, time.Unix(cmp, 0), req)
+	}
+
+	t := time.Unix(c.NotBefore, 0)
+	return verifyNbf(&t, time.Unix(cmp, 0), req)
+}
+
+// VerifyIssuer compares the iss claim against cmp.
+// If required is false, this method will return true if the value matches or is unset
+func (c *StandardClaims) VerifyIssuer(cmp string, req bool) bool {
+	return verifyIss(c.Issuer, cmp, req)
+}
+
+// ----- helpers
+
+func verifyAud(aud []string, cmp string, required bool) bool {
+	if len(aud) == 0 {
+		return !required
+	}
+	// use a var here to keep constant time compare when looping over a number of claims
+	result := false
+
+	var stringClaims string
+	for _, a := range aud {
+		if subtle.ConstantTimeCompare([]byte(a), []byte(cmp)) != 0 {
+			result = true
+		}
+		stringClaims = stringClaims + a
+	}
+
+	// case where "" is sent in one or many aud claims
+	if len(stringClaims) == 0 {
+		return !required
+	}
+
+	return result
+}
+
+func verifyExp(exp *time.Time, now time.Time, required bool) bool {
+	if exp == nil {
+		return !required
+	}
+	return now.Before(*exp)
+}
+
+func verifyIat(iat *time.Time, now time.Time, required bool) bool {
+	if iat == nil {
+		return !required
+	}
+	return now.After(*iat) || now.Equal(*iat)
+}
+
+func verifyNbf(nbf *time.Time, now time.Time, required bool) bool {
+	if nbf == nil {
+		return !required
+	}
+	return now.After(*nbf) || now.Equal(*nbf)
+}
+
+func verifyIss(iss string, cmp string, required bool) bool {
+	if iss == "" {
+		return !required
+	}
+	if subtle.ConstantTimeCompare([]byte(iss), []byte(cmp)) != 0 {
+		return true
+	} else {
+		return false
+	}
+}

vendor/github.com/golang-jwt/jwt/v4/doc.go

@@ -0,0 +1,4 @@
+// Package jwt is a Go implementation of JSON Web Tokens: http://self-issued.info/docs/draft-jones-json-web-token.html
+//
+// See README.md for more info.
+package jwt

vendor/github.com/golang-jwt/jwt/v4/ecdsa.go

@@ -0,0 +1,142 @@
+package jwt
+
+import (
+	"crypto"
+	"crypto/ecdsa"
+	"crypto/rand"
+	"errors"
+	"math/big"
+)
+
+var (
+	// Sadly this is missing from crypto/ecdsa compared to crypto/rsa
+	ErrECDSAVerification = errors.New("crypto/ecdsa: verification error")
+)
+
+// SigningMethodECDSA implements the ECDSA family of signing methods.
+// Expects *ecdsa.PrivateKey for signing and *ecdsa.PublicKey for verification
+type SigningMethodECDSA struct {
+	Name      string
+	Hash      crypto.Hash
+	KeySize   int
+	CurveBits int
+}
+
+// Specific instances for EC256 and company
+var (
+	SigningMethodES256 *SigningMethodECDSA
+	SigningMethodES384 *SigningMethodECDSA
+	SigningMethodES512 *SigningMethodECDSA
+)
+
+func init() {
+	// ES256
+	SigningMethodES256 = &SigningMethodECDSA{"ES256", crypto.SHA256, 32, 256}
+	RegisterSigningMethod(SigningMethodES256.Alg(), func() SigningMethod {
+		return SigningMethodES256
+	})
+
+	// ES384
+	SigningMethodES384 = &SigningMethodECDSA{"ES384", crypto.SHA384, 48, 384}
+	RegisterSigningMethod(SigningMethodES384.Alg(), func() SigningMethod {
+		return SigningMethodES384
+	})
+
+	// ES512
+	SigningMethodES512 = &SigningMethodECDSA{"ES512", crypto.SHA512, 66, 521}
+	RegisterSigningMethod(SigningMethodES512.Alg(), func() SigningMethod {
+		return SigningMethodES512
+	})
+}
+
+func (m *SigningMethodECDSA) Alg() string {
+	return m.Name
+}
+
+// Verify implements token verification for the SigningMethod.
+// For this verify method, key must be an ecdsa.PublicKey struct
+func (m *SigningMethodECDSA) Verify(signingString, signature string, key interface{}) error {
+	var err error
+
+	// Decode the signature
+	var sig []byte
+	if sig, err = DecodeSegment(signature); err != nil {
+		return err
+	}
+
+	// Get the key
+	var ecdsaKey *ecdsa.PublicKey
+	switch k := key.(type) {
+	case *ecdsa.PublicKey:
+		ecdsaKey = k
+	default:
+		return ErrInvalidKeyType
+	}
+
+	if len(sig) != 2*m.KeySize {
+		return ErrECDSAVerification
+	}
+
+	r := big.NewInt(0).SetBytes(sig[:m.KeySize])
+	s := big.NewInt(0).SetBytes(sig[m.KeySize:])
+
+	// Create hasher
+	if !m.Hash.Available() {
+		return ErrHashUnavailable
+	}
+	hasher := m.Hash.New()
+	hasher.Write([]byte(signingString))
+
+	// Verify the signature
+	if verifystatus := ecdsa.Verify(ecdsaKey, hasher.Sum(nil), r, s); verifystatus {
+		return nil
+	}
+
+	return ErrECDSAVerification
+}
+
+// Sign implements token signing for the SigningMethod.
+// For this signing method, key must be an ecdsa.PrivateKey struct
+func (m *SigningMethodECDSA) Sign(signingString string, key interface{}) (string, error) {
+	// Get the key
+	var ecdsaKey *ecdsa.PrivateKey
+	switch k := key.(type) {
+	case *ecdsa.PrivateKey:
+		ecdsaKey = k
+	default:
+		return "", ErrInvalidKeyType
+	}
+
+	// Create the hasher
+	if !m.Hash.Available() {
+		return "", ErrHashUnavailable
+	}
+
+	hasher := m.Hash.New()
+	hasher.Write([]byte(signingString))
+
+	// Sign the string and return r, s
+	if r, s, err := ecdsa.Sign(rand.Reader, ecdsaKey, hasher.Sum(nil)); err == nil {
+		curveBits := ecdsaKey.Curve.Params().BitSize
+
+		if m.CurveBits != curveBits {
+			return "", ErrInvalidKey
+		}
+
+		keyBytes := curveBits / 8
+		if curveBits%8 > 0 {
+			keyBytes += 1
+		}
+
+		// We serialize the outputs (r and s) into big-endian byte arrays
+		// padded with zeros on the left to make sure the sizes work out.
+		// Output must be 2*keyBytes long.
+		out := make([]byte, 2*keyBytes)
+		r.FillBytes(out[0:keyBytes]) // r is assigned to the first half of output.
+		s.FillBytes(out[keyBytes:])  // s is assigned to the second half of output.
+
+		return EncodeSegment(out), nil
+	} else {
+		return "", err
+	}
+}

vendor/github.com/golang-jwt/jwt/v4/ecdsa_utils.go

@@ -0,0 +1,69 @@
+package jwt
+
+import (
+	"crypto/ecdsa"
+	"crypto/x509"
+	"encoding/pem"
+	"errors"
+)
+
+var (
+	ErrNotECPublicKey  = errors.New("key is not a valid ECDSA public key")
+	ErrNotECPrivateKey = errors.New("key is not a valid ECDSA private key")
+)
+
+// ParseECPrivateKeyFromPEM parses a PEM encoded Elliptic Curve Private Key Structure
+func ParseECPrivateKeyFromPEM(key []byte) (*ecdsa.PrivateKey, error) {
+	var err error
+
+	// Parse PEM block
+	var block *pem.Block
+	if block, _ = pem.Decode(key); block == nil {
+		return nil, ErrKeyMustBePEMEncoded
+	}
+
+	// Parse the key
+	var parsedKey interface{}
+	if parsedKey, err = x509.ParseECPrivateKey(block.Bytes); err != nil {
+		if parsedKey, err = x509.ParsePKCS8PrivateKey(block.Bytes); err != nil {
+			return nil, err
+		}
+	}
+
+	var pkey *ecdsa.PrivateKey
+	var ok bool
+	if pkey, ok = parsedKey.(*ecdsa.PrivateKey); !ok {
+		return nil, ErrNotECPrivateKey
+	}
+
+	return pkey, nil
+}
+
+// ParseECPublicKeyFromPEM parses a PEM encoded PKCS1 or PKCS8 public key
+func ParseECPublicKeyFromPEM(key []byte) (*ecdsa.PublicKey, error) {
+	var err error
+
+	// Parse PEM block
+	var block *pem.Block
+	if block, _ = pem.Decode(key); block == nil {
+		return nil, ErrKeyMustBePEMEncoded
+	}
+
+	// Parse the key
+	var parsedKey interface{}
+	if parsedKey, err = x509.ParsePKIXPublicKey(block.Bytes); err != nil {
+		if cert, err := x509.ParseCertificate(block.Bytes); err == nil {
+			parsedKey = cert.PublicKey
+		} else {
+			return nil, err
+		}
+	}
+
+	var pkey *ecdsa.PublicKey
+	var ok bool
+	if pkey, ok = parsedKey.(*ecdsa.PublicKey); !ok {
+		return nil, ErrNotECPublicKey
+	}
+
+	return pkey, nil
+}

vendor/github.com/golang-jwt/jwt/v4/ed25519.go

@@ -0,0 +1,85 @@
+package jwt
+
+import (
+	"errors"
+
+	"crypto"
+	"crypto/ed25519"
+	"crypto/rand"
+)
+
+var (
+	ErrEd25519Verification = errors.New("ed25519: verification error")
+)
+
+// SigningMethodEd25519 implements the EdDSA family.
+// Expects ed25519.PrivateKey for signing and ed25519.PublicKey for verification
+type SigningMethodEd25519 struct{}
+
+// Specific instance for EdDSA
+var (
+	SigningMethodEdDSA *SigningMethodEd25519
+)
+
+func init() {
+	SigningMethodEdDSA = &SigningMethodEd25519{}
+	RegisterSigningMethod(SigningMethodEdDSA.Alg(), func() SigningMethod {
+		return SigningMethodEdDSA
+	})
+}
+
+func (m *SigningMethodEd25519) Alg() string {
+	return "EdDSA"
+}
+
+// Verify implements token verification for the SigningMethod.
+// For this verify method, key must be an ed25519.PublicKey
+func (m *SigningMethodEd25519) Verify(signingString, signature string, key interface{}) error {
+	var err error
+	var ed25519Key ed25519.PublicKey
+	var ok bool
+
+	if ed25519Key, ok = key.(ed25519.PublicKey); !ok {
+		return ErrInvalidKeyType
+	}
+
+	if len(ed25519Key) != ed25519.PublicKeySize {
+		return ErrInvalidKey
+	}
+
+	// Decode the signature
+	var sig []byte
+	if sig, err = DecodeSegment(signature); err != nil {
+		return err
+	}
+
+	// Verify the signature
+	if !ed25519.Verify(ed25519Key, []byte(signingString), sig) {
+		return ErrEd25519Verification
+	}
+
+	return nil
+}
+
+// Sign implements token signing for the SigningMethod.
+// For this signing method, key must be an ed25519.PrivateKey
+func (m *SigningMethodEd25519) Sign(signingString string, key interface{}) (string, error) {
+	var ed25519Key crypto.Signer
+	var ok bool
+
+	if ed25519Key, ok = key.(crypto.Signer); !ok {
+		return "", ErrInvalidKeyType
+	}
+
+	if _, ok := ed25519Key.Public().(ed25519.PublicKey); !ok {
+		return "", ErrInvalidKey
+	}
+
+	// Sign the string and return the encoded result
+	// ed25519 performs a two-pass hash as part of its algorithm. Therefore, we need to pass a non-prehashed message into the Sign function, as indicated by crypto.Hash(0)
+	sig, err := ed25519Key.Sign(rand.Reader, []byte(signingString), crypto.Hash(0))
+	if err != nil {
+		return "", err
+	}
+	return EncodeSegment(sig), nil
+}

vendor/github.com/golang-jwt/jwt/v4/ed25519_utils.go

@@ -0,0 +1,64 @@
+package jwt
+
+import (
+	"crypto"
+	"crypto/ed25519"
+	"crypto/x509"
+	"encoding/pem"
+	"errors"
+)
+
+var (
+	ErrNotEdPrivateKey = errors.New("key is not a valid Ed25519 private key")
+	ErrNotEdPublicKey  = errors.New("key is not a valid Ed25519 public key")
+)
+
+// ParseEdPrivateKeyFromPEM parses a PEM-encoded Edwards curve private key
+func ParseEdPrivateKeyFromPEM(key []byte) (crypto.PrivateKey, error) {
+	var err error
+
+	// Parse PEM block
+	var block *pem.Block
+	if block, _ = pem.Decode(key); block == nil {
+		return nil, ErrKeyMustBePEMEncoded
+	}
+
+	// Parse the key
+	var parsedKey interface{}
+	if parsedKey, err = x509.ParsePKCS8PrivateKey(block.Bytes); err != nil {
+		return nil, err
+	}
+
+	var pkey ed25519.PrivateKey
+	var ok bool
+	if pkey, ok = parsedKey.(ed25519.PrivateKey); !ok {
+		return nil, ErrNotEdPrivateKey
+	}
+
+	return pkey, nil
+}
+
+// ParseEdPublicKeyFromPEM parses a PEM-encoded Edwards curve public key
+func ParseEdPublicKeyFromPEM(key []byte) (crypto.PublicKey, error) {
+	var err error
+
+	// Parse PEM block
+	var block *pem.Block
+	if block, _ = pem.Decode(key); block == nil {
+		return nil, ErrKeyMustBePEMEncoded
+	}
+
+	// Parse the key
+	var parsedKey interface{}
+	if parsedKey, err = x509.ParsePKIXPublicKey(block.Bytes); err != nil {
+		return nil, err
+	}
+
+	var pkey ed25519.PublicKey
+	var ok bool
+	if pkey, ok = parsedKey.(ed25519.PublicKey); !ok {
+		return nil, ErrNotEdPublicKey
+	}
+
+	return pkey, nil
+}

vendor/github.com/golang-jwt/jwt/v4/errors.go

@@ -0,0 +1,112 @@
+package jwt
+
+import (
+	"errors"
+)
+
+// Error constants
+var (
+	ErrInvalidKey      = errors.New("key is invalid")
+	ErrInvalidKeyType  = errors.New("key is of invalid type")
+	ErrHashUnavailable = errors.New("the requested hash function is unavailable")
+
+	ErrTokenMalformed        = errors.New("token is malformed")
+	ErrTokenUnverifiable     = errors.New("token is unverifiable")
+	ErrTokenSignatureInvalid = errors.New("token signature is invalid")
+
+	ErrTokenInvalidAudience  = errors.New("token has invalid audience")
+	ErrTokenExpired          = errors.New("token is expired")
+	ErrTokenUsedBeforeIssued = errors.New("token used before issued")
+	ErrTokenInvalidIssuer    = errors.New("token has invalid issuer")
+	ErrTokenNotValidYet      = errors.New("token is not valid yet")
+	ErrTokenInvalidId        = errors.New("token has invalid id")
+	ErrTokenInvalidClaims    = errors.New("token has invalid claims")
+)
+
+// The errors that might occur when parsing and validating a token
+const (
+	ValidationErrorMalformed        uint32 = 1 << iota // Token is malformed
+	ValidationErrorUnverifiable                        // Token could not be verified because of signing problems
+	ValidationErrorSignatureInvalid                    // Signature validation failed
+
+	// Standard Claim validation errors
+	ValidationErrorAudience      // AUD validation failed
+	ValidationErrorExpired       // EXP validation failed
+	ValidationErrorIssuedAt      // IAT validation failed
+	ValidationErrorIssuer        // ISS validation failed
+	ValidationErrorNotValidYet   // NBF validation failed
+	ValidationErrorId            // JTI validation failed
+	ValidationErrorClaimsInvalid // Generic claims validation error
+)
+
+// NewValidationError is a helper for constructing a ValidationError with a string error message
+func NewValidationError(errorText string, errorFlags uint32) *ValidationError {
+	return &ValidationError{
+		text:   errorText,
+		Errors: errorFlags,
+	}
+}
+
+// ValidationError represents an error from Parse if token is not valid
+type ValidationError struct {
+	Inner  error  // stores the error returned by external dependencies, i.e.: KeyFunc
+	Errors uint32 // bitfield.  see ValidationError... constants
+	text   string // errors that do not have a valid error just have text
+}
+
+// Error is the implementation of the err interface.
+func (e ValidationError) Error() string {
+	if e.Inner != nil {
+		return e.Inner.Error()
+	} else if e.text != "" {
+		return e.text
+	} else {
+		return "token is invalid"
+	}
+}
+
+// Unwrap gives errors.Is and errors.As access to the inner error.
+func (e *ValidationError) Unwrap() error {
+	return e.Inner
+}
+
+// No errors
+func (e *ValidationError) valid() bool {
+	return e.Errors == 0
+}
+
+// Is checks if this ValidationError is of the supplied error. We are first checking for the exact error message
+// by comparing the inner error message. If that fails, we compare using the error flags. This way we can use
+// custom error messages (mainly for backwards compatability) and still leverage errors.Is using the global error variables.
+func (e *ValidationError) Is(err error) bool {
+	// Check, if our inner error is a direct match
+	if errors.Is(errors.Unwrap(e), err) {
+		return true
+	}
+
+	// Otherwise, we need to match using our error flags
+	switch err {
+	case ErrTokenMalformed:
+		return e.Errors&ValidationErrorMalformed != 0
+	case ErrTokenUnverifiable:
+		return e.Errors&ValidationErrorUnverifiable != 0
+	case ErrTokenSignatureInvalid:
+		return e.Errors&ValidationErrorSignatureInvalid != 0
+	case ErrTokenInvalidAudience:
+		return e.Errors&ValidationErrorAudience != 0
+	case ErrTokenExpired:
+		return e.Errors&ValidationErrorExpired != 0
+	case ErrTokenUsedBeforeIssued:
+		return e.Errors&ValidationErrorIssuedAt != 0
+	case ErrTokenInvalidIssuer:
+		return e.Errors&ValidationErrorIssuer != 0
+	case ErrTokenNotValidYet:
+		return e.Errors&ValidationErrorNotValidYet != 0
+	case ErrTokenInvalidId:
+		return e.Errors&ValidationErrorId != 0
+	case ErrTokenInvalidClaims:
+		return e.Errors&ValidationErrorClaimsInvalid != 0
+	}
+
+	return false
+}

vendor/github.com/golang-jwt/jwt/v4/hmac.go

@@ -0,0 +1,95 @@
+package jwt
+
+import (
+	"crypto"
+	"crypto/hmac"
+	"errors"
+)
+
+// SigningMethodHMAC implements the HMAC-SHA family of signing methods.
+// Expects key type of []byte for both signing and validation
+type SigningMethodHMAC struct {
+	Name string
+	Hash crypto.Hash
+}
+
+// Specific instances for HS256 and company
+var (
+	SigningMethodHS256  *SigningMethodHMAC
+	SigningMethodHS384  *SigningMethodHMAC
+	SigningMethodHS512  *SigningMethodHMAC
+	ErrSignatureInvalid = errors.New("signature is invalid")
+)
+
+func init() {
+	// HS256
+	SigningMethodHS256 = &SigningMethodHMAC{"HS256", crypto.SHA256}
+	RegisterSigningMethod(SigningMethodHS256.Alg(), func() SigningMethod {
+		return SigningMethodHS256
+	})
+
+	// HS384
+	SigningMethodHS384 = &SigningMethodHMAC{"HS384", crypto.SHA384}
+	RegisterSigningMethod(SigningMethodHS384.Alg(), func() SigningMethod {
+		return SigningMethodHS384
+	})
+
+	// HS512
+	SigningMethodHS512 = &SigningMethodHMAC{"HS512", crypto.SHA512}
+	RegisterSigningMethod(SigningMethodHS512.Alg(), func() SigningMethod {
+		return SigningMethodHS512
+	})
+}
+
+func (m *SigningMethodHMAC) Alg() string {
+	return m.Name
+}
+
+// Verify implements token verification for the SigningMethod. Returns nil if the signature is valid.
+func (m *SigningMethodHMAC) Verify(signingString, signature string, key interface{}) error {
+	// Verify the key is the right type
+	keyBytes, ok := key.([]byte)
+	if !ok {
+		return ErrInvalidKeyType
+	}
+
+	// Decode signature, for comparison
+	sig, err := DecodeSegment(signature)
+	if err != nil {
+		return err
+	}
+
+	// Can we use the specified hashing method?
+	if !m.Hash.Available() {
+		return ErrHashUnavailable
+	}
+
+	// This signing method is symmetric, so we validate the signature
+	// by reproducing the signature from the signing string and key, then
+	// comparing that against the provided signature.
+	hasher := hmac.New(m.Hash.New, keyBytes)
+	hasher.Write([]byte(signingString))
+	if !hmac.Equal(sig, hasher.Sum(nil)) {
+		return ErrSignatureInvalid
+	}
+
+	// No validation errors.  Signature is good.
+	return nil
+}
+
+// Sign implements token signing for the SigningMethod.
+// Key must be []byte
+func (m *SigningMethodHMAC) Sign(signingString string, key interface{}) (string, error) {
+	if keyBytes, ok := key.([]byte); ok {
+		if !m.Hash.Available() {
+			return "", ErrHashUnavailable
+		}
+
+		hasher := hmac.New(m.Hash.New, keyBytes)
+		hasher.Write([]byte(signingString))
+
+		return EncodeSegment(hasher.Sum(nil)), nil
+	}
+
+	return "", ErrInvalidKeyType
+}

vendor/github.com/golang-jwt/jwt/v4/map_claims.go

@@ -0,0 +1,151 @@
+package jwt
+
+import (
+	"encoding/json"
+	"errors"
+	"time"
+	// "fmt"
+)
+
+// MapClaims is a claims type that uses the map[string]interface{} for JSON decoding.
+// This is the default claims type if you don't supply one
+type MapClaims map[string]interface{}
+
+// VerifyAudience Compares the aud claim against cmp.
+// If required is false, this method will return true if the value matches or is unset
+func (m MapClaims) VerifyAudience(cmp string, req bool) bool {
+	var aud []string
+	switch v := m["aud"].(type) {
+	case string:
+		aud = append(aud, v)
+	case []string:
+		aud = v
+	case []interface{}:
+		for _, a := range v {
+			vs, ok := a.(string)
+			if !ok {
+				return false
+			}
+			aud = append(aud, vs)
+		}
+	}
+	return verifyAud(aud, cmp, req)
+}
+
+// VerifyExpiresAt compares the exp claim against cmp (cmp <= exp).
+// If req is false, it will return true, if exp is unset.
+func (m MapClaims) VerifyExpiresAt(cmp int64, req bool) bool {
+	cmpTime := time.Unix(cmp, 0)
+
+	v, ok := m["exp"]
+	if !ok {
+		return !req
+	}
+
+	switch exp := v.(type) {
+	case float64:
+		if exp == 0 {
+			return verifyExp(nil, cmpTime, req)
+		}
+
+		return verifyExp(&newNumericDateFromSeconds(exp).Time, cmpTime, req)
+	case json.Number:
+		v, _ := exp.Float64()
+
+		return verifyExp(&newNumericDateFromSeconds(v).Time, cmpTime, req)
+	}
+
+	return false
+}
+
+// VerifyIssuedAt compares the exp claim against cmp (cmp >= iat).
+// If req is false, it will return true, if iat is unset.
+func (m MapClaims) VerifyIssuedAt(cmp int64, req bool) bool {
+	cmpTime := time.Unix(cmp, 0)
+
+	v, ok := m["iat"]
+	if !ok {
+		return !req
+	}
+
+	switch iat := v.(type) {
+	case float64:
+		if iat == 0 {
+			return verifyIat(nil, cmpTime, req)
+		}
+
+		return verifyIat(&newNumericDateFromSeconds(iat).Time, cmpTime, req)
+	case json.Number:
+		v, _ := iat.Float64()
+
+		return verifyIat(&newNumericDateFromSeconds(v).Time, cmpTime, req)
+	}
+
+	return false
+}
+
+// VerifyNotBefore compares the nbf claim against cmp (cmp >= nbf).
+// If req is false, it will return true, if nbf is unset.
+func (m MapClaims) VerifyNotBefore(cmp int64, req bool) bool {
+	cmpTime := time.Unix(cmp, 0)
+
+	v, ok := m["nbf"]
+	if !ok {
+		return !req
+	}
+
+	switch nbf := v.(type) {
+	case float64:
+		if nbf == 0 {
+			return verifyNbf(nil, cmpTime, req)
+		}
+
+		return verifyNbf(&newNumericDateFromSeconds(nbf).Time, cmpTime, req)
+	case json.Number:
+		v, _ := nbf.Float64()
+
+		return verifyNbf(&newNumericDateFromSeconds(v).Time, cmpTime, req)
+	}
+
+	return false
+}
+
+// VerifyIssuer compares the iss claim against cmp.
+// If required is false, this method will return true if the value matches or is unset
+func (m MapClaims) VerifyIssuer(cmp string, req bool) bool {
+	iss, _ := m["iss"].(string)
+	return verifyIss(iss, cmp, req)
+}
+
+// Valid validates time based claims "exp, iat, nbf".
+// There is no accounting for clock skew.
+// As well, if any of the above claims are not in the token, it will still
+// be considered a valid claim.
+func (m MapClaims) Valid() error {
+	vErr := new(ValidationError)
+	now := TimeFunc().Unix()
+
+	if !m.VerifyExpiresAt(now, false) {
+		// TODO(oxisto): this should be replaced with ErrTokenExpired
+		vErr.Inner = errors.New("Token is expired")
+		vErr.Errors |= ValidationErrorExpired
+	}
+
+	if !m.VerifyIssuedAt(now, false) {
+		// TODO(oxisto): this should be replaced with ErrTokenUsedBeforeIssued
+		vErr.Inner = errors.New("Token used before issued")
+		vErr.Errors |= ValidationErrorIssuedAt
+	}
+
+	if !m.VerifyNotBefore(now, false) {
+		// TODO(oxisto): this should be replaced with ErrTokenNotValidYet
+		vErr.Inner = errors.New("Token is not valid yet")
+		vErr.Errors |= ValidationErrorNotValidYet
+	}
+
+	if vErr.valid() {
+		return nil
+	}
+
+	return vErr
+}

vendor/github.com/golang-jwt/jwt/v4/none.go

@@ -0,0 +1,52 @@
+package jwt
+
+// SigningMethodNone implements the none signing method.  This is required by the spec
+// but you probably should never use it.
+var SigningMethodNone *signingMethodNone
+
+const UnsafeAllowNoneSignatureType unsafeNoneMagicConstant = "none signing method allowed"
+
+var NoneSignatureTypeDisallowedError error
+
+type signingMethodNone struct{}
+type unsafeNoneMagicConstant string
+
+func init() {
+	SigningMethodNone = &signingMethodNone{}
+	NoneSignatureTypeDisallowedError = NewValidationError("'none' signature type is not allowed", ValidationErrorSignatureInvalid)
+
+	RegisterSigningMethod(SigningMethodNone.Alg(), func() SigningMethod {
+		return SigningMethodNone
+	})
+}
+
+func (m *signingMethodNone) Alg() string {
+	return "none"
+}
+
+// Only allow 'none' alg type if UnsafeAllowNoneSignatureType is specified as the key
+func (m *signingMethodNone) Verify(signingString, signature string, key interface{}) (err error) {
+	// Key must be UnsafeAllowNoneSignatureType to prevent accidentally
+	// accepting 'none' signing method
+	if _, ok := key.(unsafeNoneMagicConstant); !ok {
+		return NoneSignatureTypeDisallowedError
+	}
+	// If signing method is none, signature must be an empty string
+	if signature != "" {
+		return NewValidationError(
+			"'none' signing method with non-empty signature",
+			ValidationErrorSignatureInvalid,
+		)
+	}
+
+	// Accept 'none' signing method.
+	return nil
+}
+
+// Only allow 'none' signing if UnsafeAllowNoneSignatureType is specified as the key
+func (m *signingMethodNone) Sign(signingString string, key interface{}) (string, error) {
+	if _, ok := key.(unsafeNoneMagicConstant); ok {
+		return "", nil
+	}
+	return "", NoneSignatureTypeDisallowedError
+}

vendor/github.com/golang-jwt/jwt/v4/parser.go

@@ -0,0 +1,170 @@
+package jwt
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"strings"
+)
+
+type Parser struct {
+	// If populated, only these methods will be considered valid.
+	//
+	// Deprecated: In future releases, this field will not be exported anymore and should be set with an option to NewParser instead.
+	ValidMethods []string
+
+	// Use JSON Number format in JSON decoder.
+	//
+	// Deprecated: In future releases, this field will not be exported anymore and should be set with an option to NewParser instead.
+	UseJSONNumber bool
+
+	// Skip claims validation during token parsing.
+	//
+	// Deprecated: In future releases, this field will not be exported anymore and should be set with an option to NewParser instead.
+	SkipClaimsValidation bool
+}
+
+// NewParser creates a new Parser with the specified options
+func NewParser(options ...ParserOption) *Parser {
+	p := &Parser{}
+
+	// loop through our parsing options and apply them
+	for _, option := range options {
+		option(p)
+	}
+
+	return p
+}
+
+// Parse parses, validates, verifies the signature and returns the parsed token.
+// keyFunc will receive the parsed token and should return the key for validating.
+func (p *Parser) Parse(tokenString string, keyFunc Keyfunc) (*Token, error) {
+	return p.ParseWithClaims(tokenString, MapClaims{}, keyFunc)
+}
+
+func (p *Parser) ParseWithClaims(tokenString string, claims Claims, keyFunc Keyfunc) (*Token, error) {
+	token, parts, err := p.ParseUnverified(tokenString, claims)
+	if err != nil {
+		return token, err
+	}
+
+	// Verify signing method is in the required set
+	if p.ValidMethods != nil {
+		var signingMethodValid = false
+		var alg = token.Method.Alg()
+		for _, m := range p.ValidMethods {
+			if m == alg {
+				signingMethodValid = true
+				break
+			}
+		}
+		if !signingMethodValid {
+			// signing method is not in the listed set
+			return token, NewValidationError(fmt.Sprintf("signing method %v is invalid", alg), ValidationErrorSignatureInvalid)
+		}
+	}
+
+	// Lookup key
+	var key interface{}
+	if keyFunc == nil {
+		// keyFunc was not provided.  short circuiting validation
+		return token, NewValidationError("no Keyfunc was provided.", ValidationErrorUnverifiable)
+	}
+	if key, err = keyFunc(token); err != nil {
+		// keyFunc returned an error
+		if ve, ok := err.(*ValidationError); ok {
+			return token, ve
+		}
+		return token, &ValidationError{Inner: err, Errors: ValidationErrorUnverifiable}
+	}
+
+	vErr := &ValidationError{}
+
+	// Validate Claims
+	if !p.SkipClaimsValidation {
+		if err := token.Claims.Valid(); err != nil {
+
+			// If the Claims Valid returned an error, check if it is a validation error,
+			// If it was another error type, create a ValidationError with a generic ClaimsInvalid flag set
+			if e, ok := err.(*ValidationError); !ok {
+				vErr = &ValidationError{Inner: err, Errors: ValidationErrorClaimsInvalid}
+			} else {
+				vErr = e
+			}
+		}
+	}
+
+	// Perform validation
+	token.Signature = parts[2]
+	if err = token.Method.Verify(strings.Join(parts[0:2], "."), token.Signature, key); err != nil {
+		vErr.Inner = err
+		vErr.Errors |= ValidationErrorSignatureInvalid
+	}
+
+	if vErr.valid() {
+		token.Valid = true
+		return token, nil
+	}
+
+	return token, vErr
+}
+
+// ParseUnverified parses the token but doesn't validate the signature.
+//
+// WARNING: Don't use this method unless you know what you're doing.
+//
+// It's only ever useful in cases where you know the signature is valid (because it has
+// been checked previously in the stack) and you want to extract values from it.
+func (p *Parser) ParseUnverified(tokenString string, claims Claims) (token *Token, parts []string, err error) {
+	parts = strings.Split(tokenString, ".")
+	if len(parts) != 3 {
+		return nil, parts, NewValidationError("token contains an invalid number of segments", ValidationErrorMalformed)
+	}
+
+	token = &Token{Raw: tokenString}
+
+	// parse Header
+	var headerBytes []byte
+	if headerBytes, err = DecodeSegment(parts[0]); err != nil {
+		if strings.HasPrefix(strings.ToLower(tokenString), "bearer ") {
+			return token, parts, NewValidationError("tokenstring should not contain 'bearer '", ValidationErrorMalformed)
+		}
+		return token, parts, &ValidationError{Inner: err, Errors: ValidationErrorMalformed}
+	}
+	if err = json.Unmarshal(headerBytes, &token.Header); err != nil {
+		return token, parts, &ValidationError{Inner: err, Errors: ValidationErrorMalformed}
+	}
+
+	// parse Claims
+	var claimBytes []byte
+	token.Claims = claims
+
+	if claimBytes, err = DecodeSegment(parts[1]); err != nil {
+		return token, parts, &ValidationError{Inner: err, Errors: ValidationErrorMalformed}
+	}
+	dec := json.NewDecoder(bytes.NewBuffer(claimBytes))
+	if p.UseJSONNumber {
+		dec.UseNumber()
+	}
+	// JSON Decode.  Special case for map type to avoid weird pointer behavior
+	if c, ok := token.Claims.(MapClaims); ok {
+		err = dec.Decode(&c)
+	} else {
+		err = dec.Decode(&claims)
+	}
+	// Handle decode error
+	if err != nil {
+		return token, parts, &ValidationError{Inner: err, Errors: ValidationErrorMalformed}
+	}
+
+	// Lookup signature method
+	if method, ok := token.Header["alg"].(string); ok {
+		if token.Method = GetSigningMethod(method); token.Method == nil {
+			return token, parts, NewValidationError("signing method (alg) is unavailable.", ValidationErrorUnverifiable)
+		}
+	} else {
+		return token, parts, NewValidationError("signing method (alg) is unspecified.", ValidationErrorUnverifiable)
+	}
+
+	return token, parts, nil
+}

vendor/github.com/golang-jwt/jwt/v4/parser_option.go

@@ -0,0 +1,29 @@
+package jwt
+
+// ParserOption is used to implement functional-style options that modify the behavior of the parser. To add
+// new options, just create a function (ideally beginning with With or Without) that returns an anonymous function that
+// takes a *Parser type as input and manipulates its configuration accordingly.
+type ParserOption func(*Parser)
+
+// WithValidMethods is an option to supply algorithm methods that the parser will check. Only those methods will be considered valid.
+// It is heavily encouraged to use this option in order to prevent attacks such as https://auth0.com/blog/critical-vulnerabilities-in-json-web-token-libraries/.
+func WithValidMethods(methods []string) ParserOption {
+	return func(p *Parser) {
+		p.ValidMethods = methods
+	}
+}
+
+// WithJSONNumber is an option to configure the underlying JSON parser with UseNumber
+func WithJSONNumber() ParserOption {
+	return func(p *Parser) {
+		p.UseJSONNumber = true
+	}
+}
+
+// WithoutClaimsValidation is an option to disable claims validation. This option should only be used if you exactly know
+// what you are doing.
+func WithoutClaimsValidation() ParserOption {
+	return func(p *Parser) {
+		p.SkipClaimsValidation = true
+	}
+}

vendor/github.com/golang-jwt/jwt/v4/rsa.go

@@ -0,0 +1,101 @@
+package jwt
+
+import (
+	"crypto"
+	"crypto/rand"
+	"crypto/rsa"
+)
+
+// SigningMethodRSA implements the RSA family of signing methods.
+// Expects *rsa.PrivateKey for signing and *rsa.PublicKey for validation
+type SigningMethodRSA struct {
+	Name string
+	Hash crypto.Hash
+}
+
+// Specific instances for RS256 and company
+var (
+	SigningMethodRS256 *SigningMethodRSA
+	SigningMethodRS384 *SigningMethodRSA
+	SigningMethodRS512 *SigningMethodRSA
+)
+
+func init() {
+	// RS256
+	SigningMethodRS256 = &SigningMethodRSA{"RS256", crypto.SHA256}
+	RegisterSigningMethod(SigningMethodRS256.Alg(), func() SigningMethod {
+		return SigningMethodRS256
+	})
+
+	// RS384
+	SigningMethodRS384 = &SigningMethodRSA{"RS384", crypto.SHA384}
+	RegisterSigningMethod(SigningMethodRS384.Alg(), func() SigningMethod {
+		return SigningMethodRS384
+	})
+
+	// RS512
+	SigningMethodRS512 = &SigningMethodRSA{"RS512", crypto.SHA512}
+	RegisterSigningMethod(SigningMethodRS512.Alg(), func() SigningMethod {
+		return SigningMethodRS512
+	})
+}
+
+func (m *SigningMethodRSA) Alg() string {
+	return m.Name
+}
+
+// Verify implements token verification for the SigningMethod
+// For this signing method, must be an *rsa.PublicKey structure.
+func (m *SigningMethodRSA) Verify(signingString, signature string, key interface{}) error {
+	var err error
+
+	// Decode the signature
+	var sig []byte
+	if sig, err = DecodeSegment(signature); err != nil {
+		return err
+	}
+
+	var rsaKey *rsa.PublicKey
+	var ok bool
+
+	if rsaKey, ok = key.(*rsa.PublicKey); !ok {
+		return ErrInvalidKeyType
+	}
+
+	// Create hasher
+	if !m.Hash.Available() {
+		return ErrHashUnavailable
+	}
+	hasher := m.Hash.New()
+	hasher.Write([]byte(signingString))
+
+	// Verify the signature
+	return rsa.VerifyPKCS1v15(rsaKey, m.Hash, hasher.Sum(nil), sig)
+}
+
+// Sign implements token signing for the SigningMethod
+// For this signing method, must be an *rsa.PrivateKey structure.
+func (m *SigningMethodRSA) Sign(signingString string, key interface{}) (string, error) {
+	var rsaKey *rsa.PrivateKey
+	var ok bool
+
+	// Validate type of key
+	if rsaKey, ok = key.(*rsa.PrivateKey); !ok {
+		return "", ErrInvalidKey
+	}
+
+	// Create the hasher
+	if !m.Hash.Available() {
+		return "", ErrHashUnavailable
+	}
+
+	hasher := m.Hash.New()
+	hasher.Write([]byte(signingString))
+
+	// Sign the string and return the encoded bytes
+	if sigBytes, err := rsa.SignPKCS1v15(rand.Reader, rsaKey, m.Hash, hasher.Sum(nil)); err == nil {
+		return EncodeSegment(sigBytes), nil
+	} else {
+		return "", err
+	}
+}

vendor/github.com/golang-jwt/jwt/v4/rsa_pss.go

@@ -0,0 +1,143 @@
+//go:build go1.4
+// +build go1.4
+
+package jwt
+
+import (
+	"crypto"
+	"crypto/rand"
+	"crypto/rsa"
+)
+
+// SigningMethodRSAPSS implements the RSAPSS family of signing methods signing methods
+type SigningMethodRSAPSS struct {
+	*SigningMethodRSA
+	Options *rsa.PSSOptions
+	// VerifyOptions is optional. If set overrides Options for rsa.VerifyPPS.
+	// Used to accept tokens signed with rsa.PSSSaltLengthAuto, what doesn't follow
+	// https://tools.ietf.org/html/rfc7518#section-3.5 but was used previously.
+	// See https://github.com/dgrijalva/jwt-go/issues/285#issuecomment-437451244 for details.
+	VerifyOptions *rsa.PSSOptions
+}
+
+// Specific instances for RS/PS and company.
+var (
+	SigningMethodPS256 *SigningMethodRSAPSS
+	SigningMethodPS384 *SigningMethodRSAPSS
+	SigningMethodPS512 *SigningMethodRSAPSS
+)
+
+func init() {
+	// PS256
+	SigningMethodPS256 = &SigningMethodRSAPSS{
+		SigningMethodRSA: &SigningMethodRSA{
+			Name: "PS256",
+			Hash: crypto.SHA256,
+		},
+		Options: &rsa.PSSOptions{
+			SaltLength: rsa.PSSSaltLengthEqualsHash,
+		},
+		VerifyOptions: &rsa.PSSOptions{
+			SaltLength: rsa.PSSSaltLengthAuto,
+		},
+	}
+	RegisterSigningMethod(SigningMethodPS256.Alg(), func() SigningMethod {
+		return SigningMethodPS256
+	})
+
+	// PS384
+	SigningMethodPS384 = &SigningMethodRSAPSS{
+		SigningMethodRSA: &SigningMethodRSA{
+			Name: "PS384",
+			Hash: crypto.SHA384,
+		},
+		Options: &rsa.PSSOptions{
+			SaltLength: rsa.PSSSaltLengthEqualsHash,
+		},
+		VerifyOptions: &rsa.PSSOptions{
+			SaltLength: rsa.PSSSaltLengthAuto,
+		},
+	}
+	RegisterSigningMethod(SigningMethodPS384.Alg(), func() SigningMethod {
+		return SigningMethodPS384
+	})
+
+	// PS512
+	SigningMethodPS512 = &SigningMethodRSAPSS{
+		SigningMethodRSA: &SigningMethodRSA{
+			Name: "PS512",
+			Hash: crypto.SHA512,
+		},
+		Options: &rsa.PSSOptions{
+			SaltLength: rsa.PSSSaltLengthEqualsHash,
+		},
+		VerifyOptions: &rsa.PSSOptions{
+			SaltLength: rsa.PSSSaltLengthAuto,
+		},
+	}
+	RegisterSigningMethod(SigningMethodPS512.Alg(), func() SigningMethod {
+		return SigningMethodPS512
+	})
+}
+
+// Verify implements token verification for the SigningMethod.
+// For this verify method, key must be an rsa.PublicKey struct
+func (m *SigningMethodRSAPSS) Verify(signingString, signature string, key interface{}) error {
+	var err error
+
+	// Decode the signature
+	var sig []byte
+	if sig, err = DecodeSegment(signature); err != nil {
+		return err
+	}
+
+	var rsaKey *rsa.PublicKey
+	switch k := key.(type) {
+	case *rsa.PublicKey:
+		rsaKey = k
+	default:
+		return ErrInvalidKey
+	}
+
+	// Create hasher
+	if !m.Hash.Available() {
+		return ErrHashUnavailable
+	}
+	hasher := m.Hash.New()
+	hasher.Write([]byte(signingString))
+
+	opts := m.Options
+	if m.VerifyOptions != nil {
+		opts = m.VerifyOptions
+	}
+
+	return rsa.VerifyPSS(rsaKey, m.Hash, hasher.Sum(nil), sig, opts)
+}
+
+// Sign implements token signing for the SigningMethod.
+// For this signing method, key must be an rsa.PrivateKey struct
+func (m *SigningMethodRSAPSS) Sign(signingString string, key interface{}) (string, error) {
+	var rsaKey *rsa.PrivateKey
+
+	switch k := key.(type) {
+	case *rsa.PrivateKey:
+		rsaKey = k
+	default:
+		return "", ErrInvalidKeyType
+	}
+
+	// Create the hasher
+	if !m.Hash.Available() {
+		return "", ErrHashUnavailable
+	}
+
+	hasher := m.Hash.New()
+	hasher.Write([]byte(signingString))
+
+	// Sign the string and return the encoded bytes
+	if sigBytes, err := rsa.SignPSS(rand.Reader, rsaKey, m.Hash, hasher.Sum(nil), m.Options); err == nil {
+		return EncodeSegment(sigBytes), nil
+	} else {
+		return "", err
+	}
+}

vendor/github.com/golang-jwt/jwt/v4/rsa_utils.go

@@ -0,0 +1,105 @@
+package jwt
+
+import (
+	"crypto/rsa"
+	"crypto/x509"
+	"encoding/pem"
+	"errors"
+)
+
+var (
+	ErrKeyMustBePEMEncoded = errors.New("invalid key: Key must be a PEM encoded PKCS1 or PKCS8 key")
+	ErrNotRSAPrivateKey    = errors.New("key is not a valid RSA private key")
+	ErrNotRSAPublicKey     = errors.New("key is not a valid RSA public key")
+)
+
+// ParseRSAPrivateKeyFromPEM parses a PEM encoded PKCS1 or PKCS8 private key
+func ParseRSAPrivateKeyFromPEM(key []byte) (*rsa.PrivateKey, error) {
+	var err error
+
+	// Parse PEM block
+	var block *pem.Block
+	if block, _ = pem.Decode(key); block == nil {
+		return nil, ErrKeyMustBePEMEncoded
+	}
+
+	var parsedKey interface{}
+	if parsedKey, err = x509.ParsePKCS1PrivateKey(block.Bytes); err != nil {
+		if parsedKey, err = x509.ParsePKCS8PrivateKey(block.Bytes); err != nil {
+			return nil, err
+		}
+	}
+
+	var pkey *rsa.PrivateKey
+	var ok bool
+	if pkey, ok = parsedKey.(*rsa.PrivateKey); !ok {
+		return nil, ErrNotRSAPrivateKey
+	}
+
+	return pkey, nil
+}
+
+// ParseRSAPrivateKeyFromPEMWithPassword parses a PEM encoded PKCS1 or PKCS8 private key protected with password
+//
+// Deprecated: This function is deprecated and should not be used anymore. It uses the deprecated x509.DecryptPEMBlock
+// function, which was deprecated since RFC 1423 is regarded insecure by design. Unfortunately, there is no alternative
+// in the Go standard library for now. See https://github.com/golang/go/issues/8860.
+func ParseRSAPrivateKeyFromPEMWithPassword(key []byte, password string) (*rsa.PrivateKey, error) {
+	var err error
+
+	// Parse PEM block
+	var block *pem.Block
+	if block, _ = pem.Decode(key); block == nil {
+		return nil, ErrKeyMustBePEMEncoded
+	}
+
+	var parsedKey interface{}
+
+	var blockDecrypted []byte
+	if blockDecrypted, err = x509.DecryptPEMBlock(block, []byte(password)); err != nil {
+		return nil, err
+	}
+
+	if parsedKey, err = x509.ParsePKCS1PrivateKey(blockDecrypted); err != nil {
+		if parsedKey, err = x509.ParsePKCS8PrivateKey(blockDecrypted); err != nil {
+			return nil, err
+		}
+	}
+
+	var pkey *rsa.PrivateKey
+	var ok bool
+	if pkey, ok = parsedKey.(*rsa.PrivateKey); !ok {
+		return nil, ErrNotRSAPrivateKey
+	}
+
+	return pkey, nil
+}
+
+// ParseRSAPublicKeyFromPEM parses a PEM encoded PKCS1 or PKCS8 public key
+func ParseRSAPublicKeyFromPEM(key []byte) (*rsa.PublicKey, error) {
+	var err error
+
+	// Parse PEM block
+	var block *pem.Block
+	if block, _ = pem.Decode(key); block == nil {
+		return nil, ErrKeyMustBePEMEncoded
+	}
+
+	// Parse the key
+	var parsedKey interface{}
+	if parsedKey, err = x509.ParsePKIXPublicKey(block.Bytes); err != nil {
+		if cert, err := x509.ParseCertificate(block.Bytes); err == nil {
+			parsedKey = cert.PublicKey
+		} else {
+			return nil, err
+		}
+	}
+
+	var pkey *rsa.PublicKey
+	var ok bool
+	if pkey, ok = parsedKey.(*rsa.PublicKey); !ok {
+		return nil, ErrNotRSAPublicKey
+	}
+
+	return pkey, nil
+}

vendor/github.com/golang-jwt/jwt/v4/signing_method.go

@@ -0,0 +1,46 @@
+package jwt
+
+import (
+	"sync"
+)
+
+var signingMethods = map[string]func() SigningMethod{}
+var signingMethodLock = new(sync.RWMutex)
+
+// SigningMethod can be used add new methods for signing or verifying tokens.
+type SigningMethod interface {
+	Verify(signingString, signature string, key interface{}) error // Returns nil if signature is valid
+	Sign(signingString string, key interface{}) (string, error)    // Returns encoded signature or error
+	Alg() string                                                   // returns the alg identifier for this method (example: 'HS256')
+}
+
+// RegisterSigningMethod registers the "alg" name and a factory function for signing method.
+// This is typically done during init() in the method's implementation
+func RegisterSigningMethod(alg string, f func() SigningMethod) {
+	signingMethodLock.Lock()
+	defer signingMethodLock.Unlock()
+
+	signingMethods[alg] = f
+}
+
+// GetSigningMethod retrieves a signing method from an "alg" string
+func GetSigningMethod(alg string) (method SigningMethod) {
+	signingMethodLock.RLock()
+	defer signingMethodLock.RUnlock()
+
+	if methodF, ok := signingMethods[alg]; ok {
+		method = methodF()
+	}
+	return
+}
+
+// GetAlgorithms returns a list of registered "alg" names
+func GetAlgorithms() (algs []string) {
+	signingMethodLock.RLock()
+	defer signingMethodLock.RUnlock()
+
+	for alg := range signingMethods {
+		algs = append(algs, alg)
+	}
+	return
+}

vendor/github.com/golang-jwt/jwt/v4/staticcheck.conf

@@ -0,0 +1 @@
+checks = ["all", "-ST1000", "-ST1003", "-ST1016", "-ST1023"]

vendor/github.com/golang-jwt/jwt/v4/token.go

@@ -0,0 +1,127 @@
+package jwt
+
+import (
+	"encoding/base64"
+	"encoding/json"
+	"strings"
+	"time"
+)
+
+// DecodePaddingAllowed will switch the codec used for decoding JWTs respectively. Note that the JWS RFC7515
+// states that the tokens will utilize a Base64url encoding with no padding. Unfortunately, some implementations
+// of JWT are producing non-standard tokens, and thus require support for decoding. Note that this is a global
+// variable, and updating it will change the behavior on a package level, and is also NOT go-routine safe.
+// To use the non-recommended decoding, set this boolean to `true` prior to using this package.
+var DecodePaddingAllowed bool
+
+// TimeFunc provides the current time when parsing token to validate "exp" claim (expiration time).
+// You can override it to use another time value.  This is useful for testing or if your
+// server uses a different time zone than your tokens.
+var TimeFunc = time.Now
+
+// Keyfunc will be used by the Parse methods as a callback function to supply
+// the key for verification.  The function receives the parsed,
+// but unverified Token.  This allows you to use properties in the
+// Header of the token (such as `kid`) to identify which key to use.
+type Keyfunc func(*Token) (interface{}, error)
+
+// Token represents a JWT Token.  Different fields will be used depending on whether you're
+// creating or parsing/verifying a token.
+type Token struct {
+	Raw       string                 // The raw token.  Populated when you Parse a token
+	Method    SigningMethod          // The signing method used or to be used
+	Header    map[string]interface{} // The first segment of the token
+	Claims    Claims                 // The second segment of the token
+	Signature string                 // The third segment of the token.  Populated when you Parse a token
+	Valid     bool                   // Is the token valid?  Populated when you Parse/Verify a token
+}
+
+// New creates a new Token with the specified signing method and an empty map of claims.
+func New(method SigningMethod) *Token {
+	return NewWithClaims(method, MapClaims{})
+}
+
+// NewWithClaims creates a new Token with the specified signing method and claims.
+func NewWithClaims(method SigningMethod, claims Claims) *Token {
+	return &Token{
+		Header: map[string]interface{}{
+			"typ": "JWT",
+			"alg": method.Alg(),
+		},
+		Claims: claims,
+		Method: method,
+	}
+}
+
+// SignedString creates and returns a complete, signed JWT.
+// The token is signed using the SigningMethod specified in the token.
+func (t *Token) SignedString(key interface{}) (string, error) {
+	var sig, sstr string
+	var err error
+	if sstr, err = t.SigningString(); err != nil {
+		return "", err
+	}
+	if sig, err = t.Method.Sign(sstr, key); err != nil {
+		return "", err
+	}
+	return strings.Join([]string{sstr, sig}, "."), nil
+}
+
+// SigningString generates the signing string.  This is the
+// most expensive part of the whole deal.  Unless you
+// need this for something special, just go straight for
+// the SignedString.
+func (t *Token) SigningString() (string, error) {
+	var err error
+	var jsonValue []byte
+
+	if jsonValue, err = json.Marshal(t.Header); err != nil {
+		return "", err
+	}
+	header := EncodeSegment(jsonValue)
+
+	if jsonValue, err = json.Marshal(t.Claims); err != nil {
+		return "", err
+	}
+	claim := EncodeSegment(jsonValue)
+
+	return strings.Join([]string{header, claim}, "."), nil
+}
+
+// Parse parses, validates, verifies the signature and returns the parsed token.
+// keyFunc will receive the parsed token and should return the cryptographic key
+// for verifying the signature.
+// The caller is strongly encouraged to set the WithValidMethods option to
+// validate the 'alg' claim in the token matches the expected algorithm.
+// For more details about the importance of validating the 'alg' claim,
+// see https://auth0.com/blog/critical-vulnerabilities-in-json-web-token-libraries/
+func Parse(tokenString string, keyFunc Keyfunc, options ...ParserOption) (*Token, error) {
+	return NewParser(options...).Parse(tokenString, keyFunc)
+}
+
+func ParseWithClaims(tokenString string, claims Claims, keyFunc Keyfunc, options ...ParserOption) (*Token, error) {
+	return NewParser(options...).ParseWithClaims(tokenString, claims, keyFunc)
+}
+
+// EncodeSegment encodes a JWT specific base64url encoding with padding stripped
+//
+// Deprecated: In a future release, we will demote this function to a non-exported function, since it
+// should only be used internally
+func EncodeSegment(seg []byte) string {
+	return base64.RawURLEncoding.EncodeToString(seg)
+}
+
+// DecodeSegment decodes a JWT specific base64url encoding with padding stripped
+//
+// Deprecated: In a future release, we will demote this function to a non-exported function, since it
+// should only be used internally
+func DecodeSegment(seg string) ([]byte, error) {
+	if DecodePaddingAllowed {
+		if l := len(seg) % 4; l > 0 {
+			seg += strings.Repeat("=", 4-l)
+		}
+		return base64.URLEncoding.DecodeString(seg)
+	}
+
+	return base64.RawURLEncoding.DecodeString(seg)
+}

vendor/github.com/golang-jwt/jwt/v4/types.go

@@ -0,0 +1,145 @@
+package jwt
+
+import (
+	"encoding/json"
+	"fmt"
+	"math"
+	"reflect"
+	"strconv"
+	"time"
+)
+
+// TimePrecision sets the precision of times and dates within this library.
+// This has an influence on the precision of times when comparing expiry or
+// other related time fields. Furthermore, it is also the precision of times
+// when serializing.
+//
+// For backwards compatibility the default precision is set to seconds, so that
+// no fractional timestamps are generated.
+var TimePrecision = time.Second
+
+// MarshalSingleStringAsArray modifies the behaviour of the ClaimStrings type, especially
+// its MarshalJSON function.
+//
+// If it is set to true (the default), it will always serialize the type as an
+// array of strings, even if it just contains one element, defaulting to the behaviour
+// of the underlying []string. If it is set to false, it will serialize to a single
+// string, if it contains one element. Otherwise, it will serialize to an array of strings.
+var MarshalSingleStringAsArray = true
+
+// NumericDate represents a JSON numeric date value, as referenced at
+// https://datatracker.ietf.org/doc/html/rfc7519#section-2.
+type NumericDate struct {
+	time.Time
+}
+
+// NewNumericDate constructs a new *NumericDate from a standard library time.Time struct.
+// It will truncate the timestamp according to the precision specified in TimePrecision.
+func NewNumericDate(t time.Time) *NumericDate {
+	return &NumericDate{t.Truncate(TimePrecision)}
+}
+
+// newNumericDateFromSeconds creates a new *NumericDate out of a float64 representing a
+// UNIX epoch with the float fraction representing non-integer seconds.
+func newNumericDateFromSeconds(f float64) *NumericDate {
+	round, frac := math.Modf(f)
+	return NewNumericDate(time.Unix(int64(round), int64(frac*1e9)))
+}
+
+// MarshalJSON is an implementation of the json.RawMessage interface and serializes the UNIX epoch
+// represented in NumericDate to a byte array, using the precision specified in TimePrecision.
+func (date NumericDate) MarshalJSON() (b []byte, err error) {
+	var prec int
+	if TimePrecision < time.Second {
+		prec = int(math.Log10(float64(time.Second) / float64(TimePrecision)))
+	}
+	truncatedDate := date.Truncate(TimePrecision)
+
+	// For very large timestamps, UnixNano would overflow an int64, but this
+	// function requires nanosecond level precision, so we have to use the
+	// following technique to get round the issue:
+	// 1. Take the normal unix timestamp to form the whole number part of the
+	//    output,
+	// 2. Take the result of the Nanosecond function, which retuns the offset
+	//    within the second of the particular unix time instance, to form the
+	//    decimal part of the output
+	// 3. Concatenate them to produce the final result
+	seconds := strconv.FormatInt(truncatedDate.Unix(), 10)
+	nanosecondsOffset := strconv.FormatFloat(float64(truncatedDate.Nanosecond())/float64(time.Second), 'f', prec, 64)
+
+	output := append([]byte(seconds), []byte(nanosecondsOffset)[1:]...)
+
+	return output, nil
+}
+
+// UnmarshalJSON is an implementation of the json.RawMessage interface and deserializses a
+// NumericDate from a JSON representation, i.e. a json.Number. This number represents an UNIX epoch
+// with either integer or non-integer seconds.
+func (date *NumericDate) UnmarshalJSON(b []byte) (err error) {
+	var (
+		number json.Number
+		f      float64
+	)
+
+	if err = json.Unmarshal(b, &number); err != nil {
+		return fmt.Errorf("could not parse NumericData: %w", err)
+	}
+
+	if f, err = number.Float64(); err != nil {
+		return fmt.Errorf("could not convert json number value to float: %w", err)
+	}
+
+	n := newNumericDateFromSeconds(f)
+	*date = *n
+
+	return nil
+}
+
+// ClaimStrings is basically just a slice of strings, but it can be either serialized from a string array or just a string.
+// This type is necessary, since the "aud" claim can either be a single string or an array.
+type ClaimStrings []string
+
+func (s *ClaimStrings) UnmarshalJSON(data []byte) (err error) {
+	var value interface{}
+
+	if err = json.Unmarshal(data, &value); err != nil {
+		return err
+	}
+
+	var aud []string
+
+	switch v := value.(type) {
+	case string:
+		aud = append(aud, v)
+	case []string:
+		aud = ClaimStrings(v)
+	case []interface{}:
+		for _, vv := range v {
+			vs, ok := vv.(string)
+			if !ok {
+				return &json.UnsupportedTypeError{Type: reflect.TypeOf(vv)}
+			}
+			aud = append(aud, vs)
+		}
+	case nil:
+		return nil
+	default:
+		return &json.UnsupportedTypeError{Type: reflect.TypeOf(v)}
+	}
+
+	*s = aud
+
+	return
+}
+
+func (s ClaimStrings) MarshalJSON() (b []byte, err error) {
+	// This handles a special case in the JWT RFC. If the string array, e.g. used by the "aud" field,
+	// only contains one element, it MAY be serialized as a single string. This may or may not be
+	// desired based on the ecosystem of other JWT library used, so we make it configurable by the
+	// variable MarshalSingleStringAsArray.
+	if len(s) == 1 && !MarshalSingleStringAsArray {
+		return json.Marshal(s[0])
+	}
+
+	return json.Marshal([]string(s))
+}

vendor/github.com/moby/buildkit/cache/remotecache/gha/gha.go

@@ -0,0 +1,384 @@
+package gha
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"fmt"
+	"io"
+	"os"
+	"sync"
+	"time"
+
+	"github.com/containerd/containerd/content"
+	"github.com/moby/buildkit/cache/remotecache"
+	v1 "github.com/moby/buildkit/cache/remotecache/v1"
+	"github.com/moby/buildkit/session"
+	"github.com/moby/buildkit/solver"
+	"github.com/moby/buildkit/util/compression"
+	"github.com/moby/buildkit/util/progress"
+	"github.com/moby/buildkit/util/tracing"
+	"github.com/moby/buildkit/worker"
+	digest "github.com/opencontainers/go-digest"
+	ocispecs "github.com/opencontainers/image-spec/specs-go/v1"
+	"github.com/pkg/errors"
+	"github.com/sirupsen/logrus"
+	actionscache "github.com/tonistiigi/go-actions-cache"
+	"golang.org/x/sync/errgroup"
+)
+
+func init() {
+	actionscache.Log = logrus.Debugf
+}
+
+const (
+	attrScope = "scope"
+	attrToken = "token"
+	attrURL   = "url"
+	version   = "1"
+)
+
+type Config struct {
+	Scope string
+	URL   string
+	Token string
+}
+
+func getConfig(attrs map[string]string) (*Config, error) {
+	scope, ok := attrs[attrScope]
+	if !ok {
+		scope = "buildkit"
+	}
+	url, ok := attrs[attrURL]
+	if !ok {
+		return nil, errors.Errorf("url not set for github actions cache")
+	}
+	token, ok := attrs[attrToken]
+	if !ok {
+		return nil, errors.Errorf("token not set for github actions cache")
+	}
+	return &Config{
+		Scope: scope,
+		URL:   url,
+		Token: token,
+	}, nil
+}
+
+// ResolveCacheExporterFunc for Github actions cache exporter.
+func ResolveCacheExporterFunc() remotecache.ResolveCacheExporterFunc {
+	return func(ctx context.Context, g session.Group, attrs map[string]string) (remotecache.Exporter, error) {
+		cfg, err := getConfig(attrs)
+		if err != nil {
+			return nil, err
+		}
+		return NewExporter(cfg)
+	}
+}
+
+type exporter struct {
+	solver.CacheExporterTarget
+	chains *v1.CacheChains
+	cache  *actionscache.Cache
+	config *Config
+}
+
+func NewExporter(c *Config) (remotecache.Exporter, error) {
+	cc := v1.NewCacheChains()
+	cache, err := actionscache.New(c.Token, c.URL, actionscache.Opt{Client: tracing.DefaultClient})
+	if err != nil {
+		return nil, err
+	}
+	return &exporter{CacheExporterTarget: cc, chains: cc, cache: cache, config: c}, nil
+}
+
+func (*exporter) Name() string {
+	return "exporting to GitHub cache"
+}
+
+func (ce *exporter) Config() remotecache.Config {
+	return remotecache.Config{
+		Compression: compression.New(compression.Default),
+	}
+}
+
+func (ce *exporter) blobKey(dgst digest.Digest) string {
+	return "buildkit-blob-" + version + "-" + dgst.String()
+}
+
+func (ce *exporter) indexKey() string {
+	scope := ""
+	for _, s := range ce.cache.Scopes() {
+		if s.Permission&actionscache.PermissionWrite != 0 {
+			scope = s.Scope
+		}
+	}
+	scope = digest.FromBytes([]byte(scope)).Hex()[:8]
+	return "index-" + ce.config.Scope + "-" + version + "-" + scope
+}
+
+func (ce *exporter) Finalize(ctx context.Context) (map[string]string, error) {
+	// res := make(map[string]string)
+	config, descs, err := ce.chains.Marshal(ctx)
+	if err != nil {
+		return nil, err
+	}
+
+	// TODO: push parallel
+	for i, l := range config.Layers {
+		dgstPair, ok := descs[l.Blob]
+		if !ok {
+			return nil, errors.Errorf("missing blob %s", l.Blob)
+		}
+		if dgstPair.Descriptor.Annotations == nil {
+			return nil, errors.Errorf("invalid descriptor without annotations")
+		}
+		var diffID digest.Digest
+		v, ok := dgstPair.Descriptor.Annotations["containerd.io/uncompressed"]
+		if !ok {
+			return nil, errors.Errorf("invalid descriptor without uncompressed annotation")
+		}
+		dgst, err := digest.Parse(v)
+		if err != nil {
+			return nil, errors.Wrapf(err, "failed to parse uncompressed annotation")
+		}
+		diffID = dgst
+
+		key := ce.blobKey(dgstPair.Descriptor.Digest)
+		b, err := ce.cache.Load(ctx, key)
+		if err != nil {
+			return nil, err
+		}
+		if b == nil {
+			layerDone := progress.OneOff(ctx, fmt.Sprintf("writing layer %s", l.Blob))
+			ra, err := dgstPair.Provider.ReaderAt(ctx, dgstPair.Descriptor)
+			if err != nil {
+				return nil, layerDone(err)
+			}
+			if err := ce.cache.Save(ctx, key, ra); err != nil {
+				if !errors.Is(err, os.ErrExist) {
+					return nil, layerDone(errors.Wrap(err, "error writing layer blob"))
+				}
+			}
+			layerDone(nil)
+		}
+		la := &v1.LayerAnnotations{
+			DiffID:    diffID,
+			Size:      dgstPair.Descriptor.Size,
+			MediaType: dgstPair.Descriptor.MediaType,
+		}
+		if v, ok := dgstPair.Descriptor.Annotations["buildkit/createdat"]; ok {
+			var t time.Time
+			if err := (&t).UnmarshalText([]byte(v)); err != nil {
+				return nil, err
+			}
+			la.CreatedAt = t.UTC()
+		}
+		config.Layers[i].Annotations = la
+	}
+
+	dt, err := json.Marshal(config)
+	if err != nil {
+		return nil, err
+	}
+
+	if err := ce.cache.SaveMutable(ctx, ce.indexKey(), 15*time.Second, func(old *actionscache.Entry) (actionscache.Blob, error) {
+		return actionscache.NewBlob(dt), nil
+	}); err != nil {
+		return nil, err
+	}
+
+	return nil, nil
+}
+
+// ResolveCacheImporterFunc for Github actions cache importer.
+func ResolveCacheImporterFunc() remotecache.ResolveCacheImporterFunc {
+	return func(ctx context.Context, g session.Group, attrs map[string]string) (remotecache.Importer, ocispecs.Descriptor, error) {
+		cfg, err := getConfig(attrs)
+		if err != nil {
+			return nil, ocispecs.Descriptor{}, err
+		}
+		i, err := NewImporter(cfg)
+		if err != nil {
+			return nil, ocispecs.Descriptor{}, err
+		}
+		return i, ocispecs.Descriptor{}, nil
+	}
+}
+
+type importer struct {
+	cache  *actionscache.Cache
+	config *Config
+}
+
+func NewImporter(c *Config) (remotecache.Importer, error) {
+	cache, err := actionscache.New(c.Token, c.URL, actionscache.Opt{Client: tracing.DefaultClient})
+	if err != nil {
+		return nil, err
+	}
+	return &importer{cache: cache, config: c}, nil
+}
+
+func (ci *importer) makeDescriptorProviderPair(l v1.CacheLayer) (*v1.DescriptorProviderPair, error) {
+	if l.Annotations == nil {
+		return nil, errors.Errorf("cache layer with missing annotations")
+	}
+	annotations := map[string]string{}
+	if l.Annotations.DiffID == "" {
+		return nil, errors.Errorf("cache layer with missing diffid")
+	}
+	annotations["containerd.io/uncompressed"] = l.Annotations.DiffID.String()
+	if !l.Annotations.CreatedAt.IsZero() {
+		txt, err := l.Annotations.CreatedAt.MarshalText()
+		if err != nil {
+			return nil, err
+		}
+		annotations["buildkit/createdat"] = string(txt)
+	}
+	desc := ocispecs.Descriptor{
+		MediaType:   l.Annotations.MediaType,
+		Digest:      l.Blob,
+		Size:        l.Annotations.Size,
+		Annotations: annotations,
+	}
+	return &v1.DescriptorProviderPair{
+		Descriptor: desc,
+		Provider:   &ciProvider{desc: desc, ci: ci},
+	}, nil
+}
+
+func (ci *importer) loadScope(ctx context.Context, scope string) (*v1.CacheChains, error) {
+	scope = digest.FromBytes([]byte(scope)).Hex()[:8]
+	key := "index-" + ci.config.Scope + "-" + version + "-" + scope
+
+	entry, err := ci.cache.Load(ctx, key)
+	if err != nil {
+		return nil, err
+	}
+	if entry == nil {
+		return v1.NewCacheChains(), nil
+	}
+
+	// TODO: this buffer can be removed
+	buf := &bytes.Buffer{}
+	if err := entry.WriteTo(ctx, buf); err != nil {
+		return nil, err
+	}
+
+	var config v1.CacheConfig
+	if err := json.Unmarshal(buf.Bytes(), &config); err != nil {
+		return nil, errors.WithStack(err)
+	}
+
+	allLayers := v1.DescriptorProvider{}
+
+	for _, l := range config.Layers {
+		dpp, err := ci.makeDescriptorProviderPair(l)
+		if err != nil {
+			return nil, err
+		}
+		allLayers[l.Blob] = *dpp
+	}
+
+	cc := v1.NewCacheChains()
+	if err := v1.ParseConfig(config, allLayers, cc); err != nil {
+		return nil, err
+	}
+	return cc, nil
+}
+
+func (ci *importer) Resolve(ctx context.Context, _ ocispecs.Descriptor, id string, w worker.Worker) (solver.CacheManager, error) {
+	eg, ctx := errgroup.WithContext(ctx)
+	ccs := make([]*v1.CacheChains, len(ci.cache.Scopes()))
+
+	for i, s := range ci.cache.Scopes() {
+		func(i int, scope string) {
+			eg.Go(func() error {
+				cc, err := ci.loadScope(ctx, scope)
+				if err != nil {
+					return err
+				}
+				ccs[i] = cc
+				return nil
+			})
+		}(i, s.Scope)
+	}
+
+	if err := eg.Wait(); err != nil {
+		return nil, err
+	}
+
+	cms := make([]solver.CacheManager, 0, len(ccs))
+
+	for _, cc := range ccs {
+		keysStorage, resultStorage, err := v1.NewCacheKeyStorage(cc, w)
+		if err != nil {
+			return nil, err
+		}
+		cms = append(cms, solver.NewCacheManager(ctx, id, keysStorage, resultStorage))
+	}
+
+	return solver.NewCombinedCacheManager(cms, nil), nil
+}
+
+type ciProvider struct {
+	ci      *importer
+	desc    ocispecs.Descriptor
+	mu      sync.Mutex
+	entries map[digest.Digest]*actionscache.Entry
+}
+
+func (p *ciProvider) CheckDescriptor(ctx context.Context, desc ocispecs.Descriptor) error {
+	if desc.Digest != p.desc.Digest {
+		return nil
+	}
+
+	_, err := p.loadEntry(ctx, desc)
+	return err
+}
+
+func (p *ciProvider) loadEntry(ctx context.Context, desc ocispecs.Descriptor) (*actionscache.Entry, error) {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+
+	if ce, ok := p.entries[desc.Digest]; ok {
+		return ce, nil
+	}
+	key := "buildkit-blob-" + version + "-" + desc.Digest.String()
+	ce, err := p.ci.cache.Load(ctx, key)
+	if err != nil {
+		return nil, err
+	}
+	if ce == nil {
+		return nil, errors.Errorf("blob %s not found", desc.Digest)
+	}
+	if p.entries == nil {
+		p.entries = make(map[digest.Digest]*actionscache.Entry)
+	}
+	p.entries[desc.Digest] = ce
+	return ce, nil
+}
+
+func (p *ciProvider) ReaderAt(ctx context.Context, desc ocispecs.Descriptor) (content.ReaderAt, error) {
+	ce, err := p.loadEntry(ctx, desc)
+	if err != nil {
+		return nil, err
+	}
+	rac := ce.Download(context.TODO())
+	return &readerAt{ReaderAtCloser: rac, desc: desc}, nil
+}
+
+type readerAt struct {
+	actionscache.ReaderAtCloser
+	desc ocispecs.Descriptor
+}
+
+func (r *readerAt) ReadAt(p []byte, off int64) (int, error) {
+	if off >= r.desc.Size {
+		return 0, io.EOF
+	}
+	return r.ReaderAtCloser.ReadAt(p, off)
+}
+
+func (r *readerAt) Size() int64 {
+	return r.desc.Size
+}

vendor/github.com/tonistiigi/go-actions-cache/LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2021 Tõnis Tiigi
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

vendor/github.com/tonistiigi/go-actions-cache/api.md

@@ -0,0 +1,66 @@
+# Github Actions Cache service API
+
+User docs: https://docs.github.com/en/actions/guides/caching-dependencies-to-speed-up-workflows
+
+API captured from: https://github.com/actions/toolkit/tree/main/packages/cache
+
+## Authentication
+
+Actions have access to two special environment variables `ACTIONS_CACHE_URL` and `ACTIONS_RUNTIME_TOKEN`. Inline step scripts in workflows do not see these variables. [`crazy-max/ghaction-github-runtime@v1`](https://github.com/crazy-max/ghaction-github-runtime) action can be used as a workaround if needed to expose them.
+
+The base URL for cache API is `$ACTIONS_CACHE_URL/_apis/artifactcache/`.
+
+`ACTIONS_RUNTIME_TOKEN` is a JWT token valid for 6h. Token is associated with repository scopes that can be readwrite or readonly. Eg. a PR has write access to its own scope but readonly access to the target branch scope.
+
+All requests need to be authenticated with `Authorization: Bearer $ACTIONS_RUNTIME_TOKEN` .
+
+## Query cache
+
+### `GET /cache`
+
+#### Query parameters:
+
+- `keys` - comma-separated list of keys to query. Keys can be queried by prefix and do not need to match exactly. The newest record matching a prefix is returned.
+- `version` - unique value that provides namespacing. The same value needs to be used on saving cache. The actual value does not seem to be significant.
+
+
+#### Response
+
+On success returns JSON object with following properties:
+
+- `cacheKey` - full cache key used on saving (not prefix that was used in request)
+- `scope` - which scope cache object belongs to
+- `archiveLocation` - URL to download blob. This URL is already authenticated and does not need extra authentication with the token.
+
+## Save cache
+
+### `POST /caches`
+
+Reserves a cache key and returns ID (incrementing number) that can be used for uploading cache. Once a key has been reserved, there is no way to save any other data to the same key. Subsequent requests with the same key/version will receive "already exists" error. There does not seem to be a way to discard partial save on error as well that may be problematic with crashes.
+
+#### Request JSON object:
+
+- `key` - Key to reserve. A prefix of this is used on query.
+- `version` - Namespace that needs to match version on cache query.
+
+#### Response JSON object:
+
+- `cacheID` - Numeric unique ID used in next requests.
+
+
+### `PATCH /caches/[cacheID]`
+
+Uploads a chunk of data to the specified cache record. `Content-Range` headers are used to specify what range of data is being uploaded.
+
+Request body is `application/octet-stream` raw data. Successful response is empty.
+
+### `POST /caches/[cacheID]`
+
+Finalizes the cache record after all data has been uploaded with `PATCH` requests. After calling this method, data becomes available for loading. 
+
+#### Request JSON object:
+
+- `size` - Total size of the object. Needs to match with the data that was uploaded.
+
+Successful respone is empty.
+

vendor/github.com/tonistiigi/go-actions-cache/cache.go

@@ -0,0 +1,645 @@
+package actionscache
+
+import (
+	"bytes"
+	"context"
+	"crypto/sha256"
+	"encoding/hex"
+	"encoding/json"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"net/http"
+	"net/url"
+	"os"
+	"os/exec"
+	"strconv"
+	"strings"
+	"sync"
+	"time"
+
+	"github.com/dimchansky/utfbom"
+	jwt "github.com/golang-jwt/jwt/v4"
+	"github.com/pkg/errors"
+	"golang.org/x/sync/errgroup"
+)
+
+var UploadConcurrency = 4
+var UploadChunkSize = 32 * 1024 * 1024
+var noValidateToken bool
+
+var Log = func(string, ...interface{}) {}
+
+type Blob interface {
+	io.ReaderAt
+	io.Closer
+	Size() int64
+}
+
+type bufferBlob struct {
+	io.ReaderAt
+	size int64
+}
+
+func (b *bufferBlob) Size() int64 {
+	return b.size
+}
+
+func (b *bufferBlob) Close() error {
+	return nil
+}
+
+func NewBlob(dt []byte) Blob {
+	return &bufferBlob{
+		ReaderAt: bytes.NewReader(dt),
+		size:     int64(len(dt)),
+	}
+}
+
+func TryEnv(opt Opt) (*Cache, error) {
+	tokenEnc, ok := os.LookupEnv("GHCACHE_TOKEN_ENC")
+	if ok {
+		url, token, err := decryptToken(tokenEnc, os.Getenv("GHCACHE_TOKEN_PW"))
+		if err != nil {
+			return nil, err
+		}
+		return New(token, url, opt)
+	}
+
+	token, ok := os.LookupEnv("ACTIONS_RUNTIME_TOKEN")
+	if !ok {
+		return nil, nil
+	}
+
+	// ACTIONS_CACHE_URL=https://artifactcache.actions.githubusercontent.com/xxx/
+	cacheURL, ok := os.LookupEnv("ACTIONS_CACHE_URL")
+	if !ok {
+		return nil, nil
+	}
+
+	return New(token, cacheURL, opt)
+}
+
+type Opt struct {
+	Client      *http.Client
+	Timeout     time.Duration
+	BackoffPool *BackoffPool
+}
+
+func New(token, url string, opt Opt) (*Cache, error) {
+	tk, _, err := new(jwt.Parser).ParseUnverified(token, jwt.MapClaims{})
+	if err != nil {
+		return nil, errors.WithStack(err)
+	}
+	claims, ok := tk.Claims.(jwt.MapClaims)
+	if !ok {
+		return nil, errors.Errorf("invalid token without claims map")
+	}
+	ac, ok := claims["ac"]
+	if !ok {
+		return nil, errors.Errorf("invalid token without access controls")
+	}
+	acs, ok := ac.(string)
+	if !ok {
+		return nil, errors.Errorf("invalid token with access controls type %T", ac)
+	}
+
+	exp, ok := claims["exp"]
+	if !ok {
+		return nil, errors.Errorf("invalid token without expiration time")
+	}
+	expf, ok := exp.(float64)
+	if !ok {
+		return nil, errors.Errorf("invalid token with expiration time type %T", acs)
+	}
+	expt := time.Unix(int64(expf), 0)
+
+	if !noValidateToken && time.Now().After(expt) {
+		return nil, errors.Errorf("cache token expired at %v", expt)
+	}
+
+	nbf, ok := claims["nbf"]
+	if !ok {
+		return nil, errors.Errorf("invalid token without expiration time")
+	}
+	nbff, ok := nbf.(float64)
+	if !ok {
+		return nil, errors.Errorf("invalid token with expiration time type %T", nbf)
+	}
+	nbft := time.Unix(int64(nbff), 0)
+
+	if !noValidateToken && time.Now().Before(nbft) {
+		return nil, errors.Errorf("invalid token with future issue time time %v", nbft)
+	}
+
+	scopes := []Scope{}
+	if err := json.Unmarshal([]byte(acs), &scopes); err != nil {
+		return nil, errors.Wrap(err, "failed to parse token access controls")
+	}
+	Log("parsed token: scopes: %+v, issued: %v, expires: %v", scopes, nbft, expt)
+
+	if opt.Client == nil {
+		opt.Client = http.DefaultClient
+	}
+	if opt.Timeout == 0 {
+		opt.Timeout = 5 * time.Minute
+	}
+
+	if opt.BackoffPool == nil {
+		opt.BackoffPool = defaultBackoffPool
+	}
+
+	return &Cache{
+		opt:       opt,
+		scopes:    scopes,
+		URL:       url,
+		Token:     tk,
+		IssuedAt:  nbft,
+		ExpiresAt: expt,
+	}, nil
+}
+
+type Scope struct {
+	Scope      string
+	Permission Permission
+}
+
+type Permission int
+
+const (
+	PermissionRead = 1 << iota
+	PermissionWrite
+)
+
+func (p Permission) String() string {
+	out := make([]string, 0, 2)
+	if p&PermissionRead != 0 {
+		out = append(out, "Read")
+	}
+	if p&PermissionWrite != 0 {
+		out = append(out, "Write")
+	}
+	if p > PermissionRead|PermissionWrite {
+		return strconv.Itoa(int(p))
+	}
+	return strings.Join(out, "|")
+}
+
+type Cache struct {
+	opt       Opt
+	scopes    []Scope
+	URL       string
+	Token     *jwt.Token
+	IssuedAt  time.Time
+	ExpiresAt time.Time
+}
+
+func (c *Cache) Scopes() []Scope {
+	return c.scopes
+}
+
+func (c *Cache) Load(ctx context.Context, keys ...string) (*Entry, error) {
+	u, err := url.Parse(c.url("cache"))
+	if err != nil {
+		return nil, err
+	}
+	q := u.Query()
+	q.Set("keys", strings.Join(keys, ","))
+	q.Set("version", version(keys[0]))
+	u.RawQuery = q.Encode()
+
+	req := c.newRequest("GET", u.String(), nil)
+	Log("load cache %s", u.String())
+	resp, err := c.doWithRetries(ctx, req)
+	if err != nil {
+		return nil, errors.WithStack(err)
+	}
+	var ce Entry
+	dt, err := ioutil.ReadAll(io.LimitReader(resp.Body, 32*1024))
+	if err != nil {
+		return nil, errors.WithStack(err)
+	}
+	if len(dt) == 0 {
+		return nil, nil
+	}
+	if err := json.Unmarshal(dt, &ce); err != nil {
+		return nil, errors.WithStack(err)
+	}
+	ce.client = c.opt.Client
+	if ce.Key == "" {
+		return nil, nil
+	}
+	return &ce, nil
+}
+
+func (c *Cache) reserve(ctx context.Context, key string) (int, error) {
+	dt, err := json.Marshal(ReserveCacheReq{Key: key, Version: version(key)})
+	if err != nil {
+		return 0, errors.WithStack(err)
+	}
+	req := c.newRequest("POST", c.url("caches"), func() io.Reader {
+		return bytes.NewReader(dt)
+	})
+
+	req.headers["Content-Type"] = "application/json"
+	Log("save cache req %s body=%s", req.url, dt)
+	resp, err := c.doWithRetries(ctx, req)
+	if err != nil {
+		return 0, errors.WithStack(err)
+	}
+
+	dt, err = ioutil.ReadAll(io.LimitReader(resp.Body, 32*1024))
+	if err != nil {
+		return 0, errors.WithStack(err)
+	}
+	var cr ReserveCacheResp
+	if err := json.Unmarshal(dt, &cr); err != nil {
+		return 0, errors.Wrapf(err, "failed to unmarshal %s", dt)
+	}
+	if cr.CacheID == 0 {
+		return 0, errors.Errorf("invalid response %s", dt)
+	}
+	Log("save cache resp: %s", dt)
+	return cr.CacheID, nil
+}
+
+func (c *Cache) commit(ctx context.Context, id int, size int64) error {
+	dt, err := json.Marshal(CommitCacheReq{Size: size})
+	if err != nil {
+		return errors.WithStack(err)
+	}
+	req := c.newRequest("POST", c.url(fmt.Sprintf("caches/%d", id)), func() io.Reader {
+		return bytes.NewReader(dt)
+	})
+	req.headers["Content-Type"] = "application/json"
+	Log("commit cache %s, size %d", req.url, size)
+	resp, err := c.doWithRetries(ctx, req)
+	if err != nil {
+		return errors.Wrapf(err, "error committing cache %d", id)
+	}
+	dt, err = ioutil.ReadAll(io.LimitReader(resp.Body, 32*1024))
+	if err != nil {
+		return err
+	}
+	if len(dt) != 0 {
+		Log("commit response: %s", dt)
+	}
+	return resp.Body.Close()
+}
+
+func (c *Cache) upload(ctx context.Context, id int, b Blob) error {
+	var mu sync.Mutex
+	eg, ctx := errgroup.WithContext(ctx)
+	offset := int64(0)
+	for i := 0; i < UploadConcurrency; i++ {
+		eg.Go(func() error {
+			for {
+				mu.Lock()
+				start := offset
+				if start >= b.Size() {
+					mu.Unlock()
+					return nil
+				}
+				end := start + int64(UploadChunkSize)
+				if end > b.Size() {
+					end = b.Size()
+				}
+				offset = end
+				mu.Unlock()
+
+				if err := c.uploadChunk(ctx, id, b, start, end-start); err != nil {
+					return err
+				}
+			}
+		})
+	}
+	return eg.Wait()
+}
+
+func (c *Cache) Save(ctx context.Context, key string, b Blob) error {
+	id, err := c.reserve(ctx, key)
+	if err != nil {
+		return err
+	}
+
+	if err := c.upload(ctx, id, b); err != nil {
+		return err
+	}
+
+	return c.commit(ctx, id, b.Size())
+}
+
+// SaveMutable stores a blob over a possibly existing key. Previous value is passed to callback
+// that needs to return new blob. Callback may be called multiple times if two saves happen during
+// same time window. In case of a crash a key may remain locked, preventing previous changes. Timeout
+// can be set to force changes in this case without guaranteeing that previous value was up to date.
+func (c *Cache) SaveMutable(ctx context.Context, key string, forceTimeout time.Duration, f func(old *Entry) (Blob, error)) error {
+	var blocked time.Duration
+loop0:
+	for {
+		ce, err := c.Load(ctx, key+"#")
+		if err != nil {
+			return err
+		}
+		b, err := f(ce)
+		if err != nil {
+			return err
+		}
+		defer b.Close()
+		if ce != nil {
+			// check if index changed while loading
+			ce2, err := c.Load(ctx, key+"#")
+			if err != nil {
+				return err
+			}
+			if ce2 == nil || ce2.Key != ce.Key {
+				continue
+			}
+		}
+		idx := 0
+		if ce != nil {
+			idxs := strings.TrimPrefix(ce.Key, key+"#")
+			if idxs == "" {
+				return errors.Errorf("corrupt empty index for %s", key)
+			}
+			idx, err = strconv.Atoi(idxs)
+			if err != nil {
+				return errors.Wrapf(err, "failed to parse %s index", key)
+			}
+		}
+		var cacheID int
+		for {
+			idx++
+			cacheID, err = c.reserve(ctx, fmt.Sprintf("%s#%d", key, idx))
+			if err != nil {
+				if errors.Is(err, os.ErrExist) {
+					if blocked <= forceTimeout {
+						blocked += 2 * time.Second
+						select {
+						case <-ctx.Done():
+							return ctx.Err()
+						case <-time.After(2 * time.Second):
+						}
+						continue loop0
+					}
+					continue // index has been blocked a long time, maybe crashed, skip to next number
+				}
+				return err
+			}
+			break
+		}
+		if err := c.upload(ctx, cacheID, b); err != nil {
+			return nil
+		}
+		return c.commit(ctx, cacheID, b.Size())
+	}
+}
+
+func (c *Cache) uploadChunk(ctx context.Context, id int, ra io.ReaderAt, off, n int64) error {
+	req := c.newRequest("PATCH", c.url(fmt.Sprintf("caches/%d", id)), func() io.Reader {
+		return io.NewSectionReader(ra, off, n)
+	})
+	req.headers["Content-Type"] = "application/octet-stream"
+	req.headers["Content-Range"] = fmt.Sprintf("bytes %d-%d/*", off, off+n-1)
+
+	Log("upload cache chunk %s, range %d-%d", req.url, off, off+n-1)
+	resp, err := c.doWithRetries(ctx, req)
+	if err != nil {
+		return errors.WithStack(err)
+	}
+	dt, err := ioutil.ReadAll(io.LimitReader(resp.Body, 32*1024))
+	if err != nil {
+		return errors.WithStack(err)
+	}
+	if len(dt) != 0 {
+		Log("upload chunk resp: %s", dt)
+	}
+	return resp.Body.Close()
+}
+
+func (c *Cache) newRequest(method, url string, body func() io.Reader) *request {
+	return &request{
+		method: method,
+		url:    url,
+		body:   body,
+		headers: map[string]string{
+			"Authorization": "Bearer " + c.Token.Raw,
+			"Accept":        "application/json;api-version=6.0-preview.1",
+		},
+	}
+}
+
+func (c *Cache) doWithRetries(ctx context.Context, r *request) (*http.Response, error) {
+	var err error
+	max := time.Now().Add(c.opt.Timeout)
+	for {
+		if err1 := c.opt.BackoffPool.Wait(ctx, time.Until(max)); err1 != nil {
+			if err != nil {
+				return nil, errors.Wrapf(err, "%v", err1)
+			}
+			return nil, err1
+		}
+		req, err := r.httpReq()
+		if err != nil {
+			return nil, err
+		}
+		req = req.WithContext(ctx)
+
+		var resp *http.Response
+		resp, err = c.opt.Client.Do(req)
+		if err != nil {
+			return nil, errors.WithStack(err)
+		}
+		if err := checkResponse(resp); err != nil {
+			var he HTTPError
+			if errors.As(err, &he) {
+				if he.StatusCode == http.StatusTooManyRequests {
+					c.opt.BackoffPool.Delay()
+					continue
+				}
+			}
+			c.opt.BackoffPool.Reset()
+			return nil, err
+		}
+		c.opt.BackoffPool.Reset()
+		return resp, nil
+	}
+}
+
+func (c *Cache) url(p string) string {
+	return c.URL + "_apis/artifactcache/" + p
+}
+
+type ReserveCacheReq struct {
+	Key     string `json:"key"`
+	Version string `json:"version"`
+}
+
+type ReserveCacheResp struct {
+	CacheID int `json:"cacheID"`
+}
+
+type CommitCacheReq struct {
+	Size int64 `json:"size"`
+}
+
+type Entry struct {
+	Key   string `json:"cacheKey"`
+	Scope string `json:"scope"`
+	URL   string `json:"archiveLocation"`
+
+	client *http.Client
+}
+
+func (ce *Entry) WriteTo(ctx context.Context, w io.Writer) error {
+	rac := ce.Download(ctx)
+	if _, err := io.Copy(w, &rc{ReaderAt: rac}); err != nil {
+		return err
+	}
+	return rac.Close()
+}
+
+// Download returns a ReaderAtCloser for pulling the data. Concurrent reads are not allowed
+func (ce *Entry) Download(ctx context.Context) ReaderAtCloser {
+	return toReaderAtCloser(func(offset int64) (io.ReadCloser, error) {
+		req, err := http.NewRequest("GET", ce.URL, nil)
+		if err != nil {
+			return nil, errors.WithStack(err)
+		}
+		req = req.WithContext(ctx)
+		if offset != 0 {
+			req.Header.Set("Range", fmt.Sprintf("bytes=%d-", offset))
+		}
+		client := ce.client
+		if client == nil {
+			client = http.DefaultClient
+		}
+		resp, err := client.Do(req)
+		if err != nil {
+			return nil, errors.WithStack(err)
+		}
+		if resp.StatusCode < 200 || resp.StatusCode >= 300 {
+			if resp.StatusCode == http.StatusRequestedRangeNotSatisfiable {
+				return nil, errors.Errorf("invalid status response %v for %s, range: %v", resp.Status, ce.URL, req.Header.Get("Range"))
+			}
+			return nil, errors.Errorf("invalid status response %v for %s", resp.Status, ce.URL)
+		}
+		if offset != 0 {
+			cr := resp.Header.Get("content-range")
+			if !strings.HasPrefix(cr, fmt.Sprintf("bytes %d-", offset)) {
+				resp.Body.Close()
+				return nil, errors.Errorf("unhandled content range in response: %v", cr)
+			}
+		}
+		return resp.Body, nil
+	})
+}
+
+type request struct {
+	method  string
+	url     string
+	body    func() io.Reader
+	headers map[string]string
+}
+
+func (r *request) httpReq() (*http.Request, error) {
+	var body io.Reader
+	if r.body != nil {
+		body = r.body()
+	}
+	req, err := http.NewRequest(r.method, r.url, body)
+	if err != nil {
+		return nil, err
+	}
+	for k, v := range r.headers {
+		req.Header.Add(k, v)
+	}
+	return req, nil
+}
+
+func version(k string) string {
+	h := sha256.New()
+	// h.Write([]byte(k))
+	// upstream uses paths in version, we don't seem to have anything that is unique like this
+	h.Write([]byte("|go-actionscache-1.0"))
+	return hex.EncodeToString(h.Sum(nil))
+}
+
+type GithubAPIError struct {
+	Message   string `json:"message"`
+	TypeName  string `json:"typeName"`
+	TypeKey   string `json:"typeKey"`
+	ErrorCode int    `json:"errorCode"`
+}
+
+func (e GithubAPIError) Error() string {
+	return e.Message
+}
+
+func (e GithubAPIError) Is(err error) bool {
+	if err == os.ErrExist {
+		if strings.Contains(e.TypeKey, "AlreadyExists") {
+			return true
+		}
+		// for safety, in case error gets updated
+		if strings.Contains(strings.ToLower(e.Message), "already exists") {
+			return true
+		}
+	}
+	return false
+}
+
+type HTTPError struct {
+	StatusCode int
+	Err        error
+}
+
+func (e HTTPError) Error() string {
+	return e.Err.Error()
+}
+
+func (e HTTPError) Unwrap() error {
+	return e.Err
+}
+
+func checkResponse(resp *http.Response) error {
+	if resp.StatusCode >= 200 && resp.StatusCode < 300 {
+		return nil
+	}
+	dt, err := ioutil.ReadAll(utfbom.SkipOnly(io.LimitReader(resp.Body, 32*1024)))
+	if err != nil {
+		return errors.WithStack(err)
+	}
+	var gae GithubAPIError
+	if err1 := json.Unmarshal(dt, &gae); err1 != nil {
+		err = errors.Wrapf(err1, "failed to parse error response %d: %s", resp.StatusCode, dt)
+	} else if gae.Message != "" {
+		err = errors.WithStack(gae)
+	} else {
+		err = errors.Errorf("unknown error %s: %s", resp.Status, dt)
+	}
+
+	return HTTPError{
+		StatusCode: resp.StatusCode,
+		Err:        err,
+	}
+}
+
+func decryptToken(enc, pass string) (string, string, error) {
+	// openssl key derivation uses some non-standard algorithm so exec instead of using go libraries
+	// this is only used on testing anyway
+	cmd := exec.Command("openssl", "enc", "-d", "-aes-256-cbc", "-a", "-A", "-salt", "-md", "sha256", "-pass", "env:GHCACHE_TOKEN_PW")
+	cmd.Env = append(cmd.Env, fmt.Sprintf("GHCACHE_TOKEN_PW=%s", pass))
+	cmd.Stdin = bytes.NewReader([]byte(enc))
+	buf := &bytes.Buffer{}
+	cmd.Stdout = buf
+	cmd.Stderr = os.Stderr
+	if err := cmd.Run(); err != nil {
+		return "", "", err
+	}
+	parts := bytes.SplitN(buf.Bytes(), []byte(":::"), 2)
+	if len(parts) != 2 {
+		return "", "", errors.Errorf("invalid decrypt contents %s", buf.String())
+	}
+	return string(parts[0]), strings.TrimSpace(string(parts[1])), nil
+}

vendor/github.com/tonistiigi/go-actions-cache/readerat.go

@@ -0,0 +1,89 @@
+package actionscache
+
+import (
+	"io"
+)
+
+type ReaderAtCloser interface {
+	io.ReaderAt
+	io.Closer
+}
+
+type readerAtCloser struct {
+	offset int64
+	rc     io.ReadCloser
+	ra     io.ReaderAt
+	open   func(offset int64) (io.ReadCloser, error)
+	closed bool
+}
+
+func toReaderAtCloser(open func(offset int64) (io.ReadCloser, error)) ReaderAtCloser {
+	return &readerAtCloser{
+		open: open,
+	}
+}
+
+func (hrs *readerAtCloser) ReadAt(p []byte, off int64) (n int, err error) {
+	if hrs.closed {
+		return 0, io.EOF
+	}
+
+	if hrs.ra != nil {
+		return hrs.ra.ReadAt(p, off)
+	}
+
+	if hrs.rc == nil || off != hrs.offset {
+		if hrs.rc != nil {
+			hrs.rc.Close()
+			hrs.rc = nil
+		}
+		rc, err := hrs.open(off)
+		if err != nil {
+			return 0, err
+		}
+		hrs.rc = rc
+	}
+	if ra, ok := hrs.rc.(io.ReaderAt); ok {
+		hrs.ra = ra
+		n, err = ra.ReadAt(p, off)
+	} else {
+		for {
+			var nn int
+			nn, err = hrs.rc.Read(p)
+			n += nn
+			p = p[nn:]
+			if nn == len(p) || err != nil {
+				break
+			}
+		}
+	}
+
+	hrs.offset += int64(n)
+	return
+}
+
+func (hrs *readerAtCloser) Close() error {
+	if hrs.closed {
+		return nil
+	}
+	hrs.closed = true
+	if hrs.rc != nil {
+		return hrs.rc.Close()
+	}
+
+	return nil
+}
+
+type rc struct {
+	io.ReaderAt
+	offset int
+}
+
+func (r *rc) Read(b []byte) (int, error) {
+	n, err := r.ReadAt(b, int64(r.offset))
+	r.offset += n
+	if n > 0 && err == io.EOF {
+		err = nil
+	}
+	return n, err
+}

vendor/github.com/tonistiigi/go-actions-cache/retry.go

@@ -0,0 +1,108 @@
+package actionscache
+
+import (
+	"context"
+	"sync"
+	"time"
+
+	"github.com/pkg/errors"
+)
+
+const maxBackoff = time.Second * 90
+const minBackoff = time.Second * 1
+
+var defaultBackoffPool = &BackoffPool{}
+
+type BackoffPool struct {
+	mu      sync.Mutex
+	queue   []chan struct{}
+	timer   *time.Timer
+	backoff time.Duration
+	target  time.Time
+}
+
+func (b *BackoffPool) Wait(ctx context.Context, timeout time.Duration) error {
+	b.mu.Lock()
+	if b.timer == nil {
+		b.mu.Unlock()
+		return nil
+	}
+
+	done := make(chan struct{})
+	b.queue = append(b.queue, done)
+
+	b.mu.Unlock()
+
+	select {
+	case <-ctx.Done():
+		return ctx.Err()
+	case <-done:
+		return nil
+	case <-time.After(timeout):
+		return errors.Errorf("maximum timeout reached")
+	}
+}
+
+func (b *BackoffPool) Reset() {
+	b.mu.Lock()
+	b.reset()
+	b.backoff = 0
+	b.mu.Unlock()
+}
+func (b *BackoffPool) reset() {
+	for _, done := range b.queue {
+		close(done)
+	}
+	b.queue = nil
+	if b.timer != nil {
+		b.timer.Stop()
+		b.timer = nil
+	}
+}
+
+func (b *BackoffPool) trigger(t *time.Timer) {
+	b.mu.Lock()
+	if b.timer != t {
+		// this timer is not the current one
+		b.mu.Unlock()
+		return
+	}
+
+	b.reset()
+	b.backoff = b.backoff * 2
+	if b.backoff > maxBackoff {
+		b.backoff = maxBackoff
+	}
+	b.mu.Unlock()
+}
+
+func (b *BackoffPool) Delay() {
+	b.mu.Lock()
+	if b.timer != nil {
+		minTime := time.Now().Add(minBackoff)
+		if b.target.Before(minTime) {
+			b.target = minTime
+			b.timer.Stop()
+			b.setupTimer()
+		}
+		b.mu.Unlock()
+		return
+	}
+
+	if b.backoff == 0 {
+		b.backoff = minBackoff
+	}
+
+	b.target = time.Now().Add(b.backoff)
+	b.setupTimer()
+
+	b.mu.Unlock()
+}
+
+func (b *BackoffPool) setupTimer() {
+	var t *time.Timer
+	b.timer = time.AfterFunc(time.Until(b.target), func() {
+		b.trigger(t)
+	})
+	t = b.timer
+}

vendor/modules.txt

@@ -350,6 +350,9 @@ github.com/cyphar/filepath-securejoin
 # github.com/deckarep/golang-set v0.0.0-20141123011944-ef32fa3046d9
 ## explicit
 github.com/deckarep/golang-set
+# github.com/dimchansky/utfbom v1.1.1
+## explicit
+github.com/dimchansky/utfbom
 # github.com/docker/distribution v2.8.1+incompatible
 ## explicit
 github.com/docker/distribution
@@ -427,6 +430,9 @@ github.com/gogo/protobuf/proto
 github.com/gogo/protobuf/protoc-gen-gogo/descriptor
 github.com/gogo/protobuf/sortkeys
 github.com/gogo/protobuf/types
+# github.com/golang-jwt/jwt/v4 v4.4.2
+## explicit; go 1.16
+github.com/golang-jwt/jwt/v4
 # github.com/golang/gddo v0.0.0-20190904175337-72a348e765d2
 ## explicit
 github.com/golang/gddo/httputil
@@ -570,6 +576,7 @@ github.com/moby/buildkit/cache/config
 github.com/moby/buildkit/cache/contenthash
 github.com/moby/buildkit/cache/metadata
 github.com/moby/buildkit/cache/remotecache
+github.com/moby/buildkit/cache/remotecache/gha
 github.com/moby/buildkit/cache/remotecache/inline
 github.com/moby/buildkit/cache/remotecache/local
 github.com/moby/buildkit/cache/remotecache/registry
@@ -904,6 +911,9 @@ github.com/tinylib/msgp/msgp
 github.com/tonistiigi/fsutil
 github.com/tonistiigi/fsutil/copy
 github.com/tonistiigi/fsutil/types
+# github.com/tonistiigi/go-actions-cache v0.0.0-20220404170428-0bdeb6e1eac7
+## explicit; go 1.16
+github.com/tonistiigi/go-actions-cache
 # github.com/tonistiigi/go-archvariant v1.0.0
 ## explicit; go 1.17
 github.com/tonistiigi/go-archvariant