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@@ -0,0 +1,576 @@
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+package image
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+
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+import (
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+ "encoding/hex"
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+ "encoding/json"
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+ "errors"
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+ "fmt"
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+ "io"
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+ "net"
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+ "net/http"
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+ "net/url"
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+ "os"
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+ "path"
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+ "path/filepath"
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+ "sort"
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+ "time"
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+
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+ "golang.org/x/net/context"
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+
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+ "github.com/Sirupsen/logrus"
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+ "github.com/docker/distribution/digest"
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+ "github.com/docker/distribution/registry/client/auth"
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+ "github.com/docker/distribution/registry/client/transport"
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+ "github.com/docker/docker/api/types"
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+ registrytypes "github.com/docker/docker/api/types/registry"
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+ "github.com/docker/docker/cli/command"
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+ "github.com/docker/docker/cliconfig"
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+ "github.com/docker/docker/distribution"
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+ "github.com/docker/docker/pkg/jsonmessage"
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+ "github.com/docker/docker/reference"
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+ "github.com/docker/docker/registry"
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+ "github.com/docker/go-connections/tlsconfig"
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+ "github.com/docker/notary/client"
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+ "github.com/docker/notary/passphrase"
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+ "github.com/docker/notary/trustmanager"
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+ "github.com/docker/notary/trustpinning"
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+ "github.com/docker/notary/tuf/data"
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+ "github.com/docker/notary/tuf/signed"
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+ "github.com/docker/notary/tuf/store"
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+)
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+
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+var (
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+ releasesRole = path.Join(data.CanonicalTargetsRole, "releases")
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+)
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+
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+type target struct {
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+ reference registry.Reference
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+ digest digest.Digest
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+ size int64
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+}
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+
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+// trustedPush handles content trust pushing of an image
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+func trustedPush(ctx context.Context, cli *command.DockerCli, repoInfo *registry.RepositoryInfo, ref reference.Named, authConfig types.AuthConfig, requestPrivilege types.RequestPrivilegeFunc) error {
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+ responseBody, err := imagePushPrivileged(ctx, cli, authConfig, ref.String(), requestPrivilege)
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+ if err != nil {
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+ return err
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+ }
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+
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+ defer responseBody.Close()
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+
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+ // If it is a trusted push we would like to find the target entry which match the
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+ // tag provided in the function and then do an AddTarget later.
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+ target := &client.Target{}
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+ // Count the times of calling for handleTarget,
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+ // if it is called more that once, that should be considered an error in a trusted push.
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+ cnt := 0
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+ handleTarget := func(aux *json.RawMessage) {
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+ cnt++
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+ if cnt > 1 {
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+ // handleTarget should only be called one. This will be treated as an error.
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+ return
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+ }
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+
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+ var pushResult distribution.PushResult
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+ err := json.Unmarshal(*aux, &pushResult)
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+ if err == nil && pushResult.Tag != "" && pushResult.Digest.Validate() == nil {
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+ h, err := hex.DecodeString(pushResult.Digest.Hex())
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+ if err != nil {
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+ target = nil
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+ return
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+ }
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+ target.Name = registry.ParseReference(pushResult.Tag).String()
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+ target.Hashes = data.Hashes{string(pushResult.Digest.Algorithm()): h}
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+ target.Length = int64(pushResult.Size)
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+ }
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+ }
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+
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+ var tag string
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+ switch x := ref.(type) {
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+ case reference.Canonical:
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+ return errors.New("cannot push a digest reference")
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+ case reference.NamedTagged:
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+ tag = x.Tag()
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+ }
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+
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+ // We want trust signatures to always take an explicit tag,
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+ // otherwise it will act as an untrusted push.
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+ if tag == "" {
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+ if err = jsonmessage.DisplayJSONMessagesToStream(responseBody, cli.Out(), nil); err != nil {
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+ return err
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+ }
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+ fmt.Fprintln(cli.Out(), "No tag specified, skipping trust metadata push")
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+ return nil
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+ }
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+
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+ if err = jsonmessage.DisplayJSONMessagesToStream(responseBody, cli.Out(), handleTarget); err != nil {
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+ return err
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+ }
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+
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+ if cnt > 1 {
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+ return fmt.Errorf("internal error: only one call to handleTarget expected")
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+ }
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+
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+ if target == nil {
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+ fmt.Fprintln(cli.Out(), "No targets found, please provide a specific tag in order to sign it")
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+ return nil
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+ }
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+
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+ fmt.Fprintln(cli.Out(), "Signing and pushing trust metadata")
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+
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+ repo, err := GetNotaryRepository(cli, repoInfo, authConfig, "push", "pull")
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+ if err != nil {
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+ fmt.Fprintf(cli.Out(), "Error establishing connection to notary repository: %s\n", err)
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+ return err
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+ }
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+
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+ // get the latest repository metadata so we can figure out which roles to sign
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+ err = repo.Update(false)
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+
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+ switch err.(type) {
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+ case client.ErrRepoNotInitialized, client.ErrRepositoryNotExist:
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+ keys := repo.CryptoService.ListKeys(data.CanonicalRootRole)
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+ var rootKeyID string
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+ // always select the first root key
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+ if len(keys) > 0 {
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+ sort.Strings(keys)
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+ rootKeyID = keys[0]
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+ } else {
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+ rootPublicKey, err := repo.CryptoService.Create(data.CanonicalRootRole, "", data.ECDSAKey)
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+ if err != nil {
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+ return err
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+ }
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+ rootKeyID = rootPublicKey.ID()
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+ }
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+
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+ // Initialize the notary repository with a remotely managed snapshot key
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+ if err := repo.Initialize(rootKeyID, data.CanonicalSnapshotRole); err != nil {
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+ return notaryError(repoInfo.FullName(), err)
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+ }
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+ fmt.Fprintf(cli.Out(), "Finished initializing %q\n", repoInfo.FullName())
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+ err = repo.AddTarget(target, data.CanonicalTargetsRole)
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+ case nil:
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+ // already initialized and we have successfully downloaded the latest metadata
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+ err = addTargetToAllSignableRoles(repo, target)
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+ default:
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+ return notaryError(repoInfo.FullName(), err)
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+ }
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+
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+ if err == nil {
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+ err = repo.Publish()
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+ }
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+
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+ if err != nil {
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+ fmt.Fprintf(cli.Out(), "Failed to sign %q:%s - %s\n", repoInfo.FullName(), tag, err.Error())
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+ return notaryError(repoInfo.FullName(), err)
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+ }
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+
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+ fmt.Fprintf(cli.Out(), "Successfully signed %q:%s\n", repoInfo.FullName(), tag)
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+ return nil
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+}
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+
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+// Attempt to add the image target to all the top level delegation roles we can
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+// (based on whether we have the signing key and whether the role's path allows
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+// us to).
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+// If there are no delegation roles, we add to the targets role.
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+func addTargetToAllSignableRoles(repo *client.NotaryRepository, target *client.Target) error {
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+ var signableRoles []string
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+
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+ // translate the full key names, which includes the GUN, into just the key IDs
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+ allCanonicalKeyIDs := make(map[string]struct{})
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+ for fullKeyID := range repo.CryptoService.ListAllKeys() {
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+ allCanonicalKeyIDs[path.Base(fullKeyID)] = struct{}{}
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+ }
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+
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+ allDelegationRoles, err := repo.GetDelegationRoles()
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+ if err != nil {
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+ return err
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+ }
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+
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+ // if there are no delegation roles, then just try to sign it into the targets role
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+ if len(allDelegationRoles) == 0 {
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+ return repo.AddTarget(target, data.CanonicalTargetsRole)
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+ }
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+
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+ // there are delegation roles, find every delegation role we have a key for, and
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+ // attempt to sign into into all those roles.
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+ for _, delegationRole := range allDelegationRoles {
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+ // We do not support signing any delegation role that isn't a direct child of the targets role.
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+ // Also don't bother checking the keys if we can't add the target
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+ // to this role due to path restrictions
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+ if path.Dir(delegationRole.Name) != data.CanonicalTargetsRole || !delegationRole.CheckPaths(target.Name) {
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+ continue
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+ }
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+
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+ for _, canonicalKeyID := range delegationRole.KeyIDs {
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+ if _, ok := allCanonicalKeyIDs[canonicalKeyID]; ok {
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+ signableRoles = append(signableRoles, delegationRole.Name)
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+ break
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+ }
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+ }
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+ }
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+
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+ if len(signableRoles) == 0 {
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+ return fmt.Errorf("no valid signing keys for delegation roles")
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+ }
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+
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+ return repo.AddTarget(target, signableRoles...)
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+}
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+
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+// imagePushPrivileged push the image
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+func imagePushPrivileged(ctx context.Context, cli *command.DockerCli, authConfig types.AuthConfig, ref string, requestPrivilege types.RequestPrivilegeFunc) (io.ReadCloser, error) {
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+ encodedAuth, err := command.EncodeAuthToBase64(authConfig)
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+ if err != nil {
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+ return nil, err
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+ }
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+ options := types.ImagePushOptions{
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+ RegistryAuth: encodedAuth,
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+ PrivilegeFunc: requestPrivilege,
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+ }
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+
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+ return cli.Client().ImagePush(ctx, ref, options)
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+}
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+
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+// trustedPull handles content trust pulling of an image
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+func trustedPull(ctx context.Context, cli *command.DockerCli, repoInfo *registry.RepositoryInfo, ref registry.Reference, authConfig types.AuthConfig, requestPrivilege types.RequestPrivilegeFunc) error {
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+ var refs []target
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+
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+ notaryRepo, err := GetNotaryRepository(cli, repoInfo, authConfig, "pull")
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+ if err != nil {
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+ fmt.Fprintf(cli.Out(), "Error establishing connection to trust repository: %s\n", err)
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+ return err
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+ }
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+
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+ if ref.String() == "" {
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+ // List all targets
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+ targets, err := notaryRepo.ListTargets(releasesRole, data.CanonicalTargetsRole)
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+ if err != nil {
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+ return notaryError(repoInfo.FullName(), err)
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+ }
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+ for _, tgt := range targets {
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+ t, err := convertTarget(tgt.Target)
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+ if err != nil {
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+ fmt.Fprintf(cli.Out(), "Skipping target for %q\n", repoInfo.Name())
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+ continue
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+ }
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+ // Only list tags in the top level targets role or the releases delegation role - ignore
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+ // all other delegation roles
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+ if tgt.Role != releasesRole && tgt.Role != data.CanonicalTargetsRole {
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+ continue
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+ }
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+ refs = append(refs, t)
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+ }
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+ if len(refs) == 0 {
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+ return notaryError(repoInfo.FullName(), fmt.Errorf("No trusted tags for %s", repoInfo.FullName()))
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+ }
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+ } else {
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+ t, err := notaryRepo.GetTargetByName(ref.String(), releasesRole, data.CanonicalTargetsRole)
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+ if err != nil {
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+ return notaryError(repoInfo.FullName(), err)
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+ }
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+ // Only get the tag if it's in the top level targets role or the releases delegation role
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+ // ignore it if it's in any other delegation roles
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+ if t.Role != releasesRole && t.Role != data.CanonicalTargetsRole {
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+ return notaryError(repoInfo.FullName(), fmt.Errorf("No trust data for %s", ref.String()))
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+ }
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+
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+ logrus.Debugf("retrieving target for %s role\n", t.Role)
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+ r, err := convertTarget(t.Target)
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+ if err != nil {
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+ return err
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+
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+ }
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+ refs = append(refs, r)
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+ }
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+
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+ for i, r := range refs {
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+ displayTag := r.reference.String()
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+ if displayTag != "" {
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+ displayTag = ":" + displayTag
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+ }
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+ fmt.Fprintf(cli.Out(), "Pull (%d of %d): %s%s@%s\n", i+1, len(refs), repoInfo.Name(), displayTag, r.digest)
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+
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+ ref, err := reference.WithDigest(repoInfo, r.digest)
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+ if err != nil {
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+ return err
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+ }
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+ if err := imagePullPrivileged(ctx, cli, authConfig, ref.String(), requestPrivilege, false); err != nil {
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+ return err
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+ }
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+
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+ // If reference is not trusted, tag by trusted reference
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+ if !r.reference.HasDigest() {
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+ tagged, err := reference.WithTag(repoInfo, r.reference.String())
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+ if err != nil {
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+ return err
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+ }
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+ trustedRef, err := reference.WithDigest(repoInfo, r.digest)
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+ if err != nil {
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+ return err
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+ }
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+ if err := TagTrusted(ctx, cli, trustedRef, tagged); err != nil {
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+ return err
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+ }
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+ }
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+ }
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+ return nil
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+}
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+
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+// imagePullPrivileged pulls the image and displays it to the output
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+func imagePullPrivileged(ctx context.Context, cli *command.DockerCli, authConfig types.AuthConfig, ref string, requestPrivilege types.RequestPrivilegeFunc, all bool) error {
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+
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+ encodedAuth, err := command.EncodeAuthToBase64(authConfig)
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+ if err != nil {
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+ return err
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+ }
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+ options := types.ImagePullOptions{
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+ RegistryAuth: encodedAuth,
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+ PrivilegeFunc: requestPrivilege,
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+ All: all,
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+ }
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+
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+ responseBody, err := cli.Client().ImagePull(ctx, ref, options)
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+ if err != nil {
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+ return err
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+ }
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+ defer responseBody.Close()
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+
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+ return jsonmessage.DisplayJSONMessagesToStream(responseBody, cli.Out(), nil)
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+}
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+
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+func trustDirectory() string {
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+ return filepath.Join(cliconfig.ConfigDir(), "trust")
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+}
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+
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+// certificateDirectory returns the directory containing
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+// TLS certificates for the given server. An error is
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+// returned if there was an error parsing the server string.
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+func certificateDirectory(server string) (string, error) {
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+ u, err := url.Parse(server)
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+ if err != nil {
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+ return "", err
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+ }
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+
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+ return filepath.Join(cliconfig.ConfigDir(), "tls", u.Host), nil
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+}
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+
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+func trustServer(index *registrytypes.IndexInfo) (string, error) {
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+ if s := os.Getenv("DOCKER_CONTENT_TRUST_SERVER"); s != "" {
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+ urlObj, err := url.Parse(s)
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+ if err != nil || urlObj.Scheme != "https" {
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+ return "", fmt.Errorf("valid https URL required for trust server, got %s", s)
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+ }
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+
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+ return s, nil
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+ }
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+ if index.Official {
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+ return registry.NotaryServer, nil
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+ }
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+ return "https://" + index.Name, nil
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+}
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+
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+type simpleCredentialStore struct {
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+ auth types.AuthConfig
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+}
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+
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+func (scs simpleCredentialStore) Basic(u *url.URL) (string, string) {
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+ return scs.auth.Username, scs.auth.Password
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+}
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+
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+func (scs simpleCredentialStore) RefreshToken(u *url.URL, service string) string {
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+ return scs.auth.IdentityToken
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+}
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+
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+func (scs simpleCredentialStore) SetRefreshToken(*url.URL, string, string) {
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+}
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+
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+// GetNotaryRepository returns a NotaryRepository which stores all the
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+// information needed to operate on a notary repository.
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+// It creates an HTTP transport providing authentication support.
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+// TODO: move this too
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+func GetNotaryRepository(streams command.Streams, repoInfo *registry.RepositoryInfo, authConfig types.AuthConfig, actions ...string) (*client.NotaryRepository, error) {
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+ server, err := trustServer(repoInfo.Index)
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+ if err != nil {
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+ return nil, err
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+ }
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+
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+ var cfg = tlsconfig.ClientDefault()
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+ cfg.InsecureSkipVerify = !repoInfo.Index.Secure
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+
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+ // Get certificate base directory
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+ certDir, err := certificateDirectory(server)
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+ if err != nil {
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+ return nil, err
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+ }
|
|
|
+ logrus.Debugf("reading certificate directory: %s", certDir)
|
|
|
+
|
|
|
+ if err := registry.ReadCertsDirectory(cfg, certDir); err != nil {
|
|
|
+ return nil, err
|
|
|
+ }
|
|
|
+
|
|
|
+ base := &http.Transport{
|
|
|
+ Proxy: http.ProxyFromEnvironment,
|
|
|
+ Dial: (&net.Dialer{
|
|
|
+ Timeout: 30 * time.Second,
|
|
|
+ KeepAlive: 30 * time.Second,
|
|
|
+ DualStack: true,
|
|
|
+ }).Dial,
|
|
|
+ TLSHandshakeTimeout: 10 * time.Second,
|
|
|
+ TLSClientConfig: cfg,
|
|
|
+ DisableKeepAlives: true,
|
|
|
+ }
|
|
|
+
|
|
|
+ // Skip configuration headers since request is not going to Docker daemon
|
|
|
+ modifiers := registry.DockerHeaders(command.UserAgent(), http.Header{})
|
|
|
+ authTransport := transport.NewTransport(base, modifiers...)
|
|
|
+ pingClient := &http.Client{
|
|
|
+ Transport: authTransport,
|
|
|
+ Timeout: 5 * time.Second,
|
|
|
+ }
|
|
|
+ endpointStr := server + "/v2/"
|
|
|
+ req, err := http.NewRequest("GET", endpointStr, nil)
|
|
|
+ if err != nil {
|
|
|
+ return nil, err
|
|
|
+ }
|
|
|
+
|
|
|
+ challengeManager := auth.NewSimpleChallengeManager()
|
|
|
+
|
|
|
+ resp, err := pingClient.Do(req)
|
|
|
+ if err != nil {
|
|
|
+ // Ignore error on ping to operate in offline mode
|
|
|
+ logrus.Debugf("Error pinging notary server %q: %s", endpointStr, err)
|
|
|
+ } else {
|
|
|
+ defer resp.Body.Close()
|
|
|
+
|
|
|
+ // Add response to the challenge manager to parse out
|
|
|
+ // authentication header and register authentication method
|
|
|
+ if err := challengeManager.AddResponse(resp); err != nil {
|
|
|
+ return nil, err
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ creds := simpleCredentialStore{auth: authConfig}
|
|
|
+ tokenHandler := auth.NewTokenHandler(authTransport, creds, repoInfo.FullName(), actions...)
|
|
|
+ basicHandler := auth.NewBasicHandler(creds)
|
|
|
+ modifiers = append(modifiers, transport.RequestModifier(auth.NewAuthorizer(challengeManager, tokenHandler, basicHandler)))
|
|
|
+ tr := transport.NewTransport(base, modifiers...)
|
|
|
+
|
|
|
+ return client.NewNotaryRepository(
|
|
|
+ trustDirectory(),
|
|
|
+ repoInfo.FullName(),
|
|
|
+ server,
|
|
|
+ tr,
|
|
|
+ getPassphraseRetriever(streams),
|
|
|
+ trustpinning.TrustPinConfig{})
|
|
|
+}
|
|
|
+
|
|
|
+func getPassphraseRetriever(streams command.Streams) passphrase.Retriever {
|
|
|
+ aliasMap := map[string]string{
|
|
|
+ "root": "root",
|
|
|
+ "snapshot": "repository",
|
|
|
+ "targets": "repository",
|
|
|
+ "default": "repository",
|
|
|
+ }
|
|
|
+ baseRetriever := passphrase.PromptRetrieverWithInOut(streams.In(), streams.Out(), aliasMap)
|
|
|
+ env := map[string]string{
|
|
|
+ "root": os.Getenv("DOCKER_CONTENT_TRUST_ROOT_PASSPHRASE"),
|
|
|
+ "snapshot": os.Getenv("DOCKER_CONTENT_TRUST_REPOSITORY_PASSPHRASE"),
|
|
|
+ "targets": os.Getenv("DOCKER_CONTENT_TRUST_REPOSITORY_PASSPHRASE"),
|
|
|
+ "default": os.Getenv("DOCKER_CONTENT_TRUST_REPOSITORY_PASSPHRASE"),
|
|
|
+ }
|
|
|
+
|
|
|
+ return func(keyName string, alias string, createNew bool, numAttempts int) (string, bool, error) {
|
|
|
+ if v := env[alias]; v != "" {
|
|
|
+ return v, numAttempts > 1, nil
|
|
|
+ }
|
|
|
+ // For non-root roles, we can also try the "default" alias if it is specified
|
|
|
+ if v := env["default"]; v != "" && alias != data.CanonicalRootRole {
|
|
|
+ return v, numAttempts > 1, nil
|
|
|
+ }
|
|
|
+ return baseRetriever(keyName, alias, createNew, numAttempts)
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+// TrustedReference returns the canonical trusted reference for an image reference
|
|
|
+func TrustedReference(ctx context.Context, cli *command.DockerCli, ref reference.NamedTagged) (reference.Canonical, error) {
|
|
|
+ repoInfo, err := registry.ParseRepositoryInfo(ref)
|
|
|
+ if err != nil {
|
|
|
+ return nil, err
|
|
|
+ }
|
|
|
+
|
|
|
+ // Resolve the Auth config relevant for this server
|
|
|
+ authConfig := cli.ResolveAuthConfig(ctx, repoInfo.Index)
|
|
|
+
|
|
|
+ notaryRepo, err := GetNotaryRepository(cli, repoInfo, authConfig, "pull")
|
|
|
+ if err != nil {
|
|
|
+ fmt.Fprintf(cli.Out(), "Error establishing connection to trust repository: %s\n", err)
|
|
|
+ return nil, err
|
|
|
+ }
|
|
|
+
|
|
|
+ t, err := notaryRepo.GetTargetByName(ref.Tag(), releasesRole, data.CanonicalTargetsRole)
|
|
|
+ if err != nil {
|
|
|
+ return nil, err
|
|
|
+ }
|
|
|
+ // Only list tags in the top level targets role or the releases delegation role - ignore
|
|
|
+ // all other delegation roles
|
|
|
+ if t.Role != releasesRole && t.Role != data.CanonicalTargetsRole {
|
|
|
+ return nil, notaryError(repoInfo.FullName(), fmt.Errorf("No trust data for %s", ref.Tag()))
|
|
|
+ }
|
|
|
+ r, err := convertTarget(t.Target)
|
|
|
+ if err != nil {
|
|
|
+ return nil, err
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ return reference.WithDigest(ref, r.digest)
|
|
|
+}
|
|
|
+
|
|
|
+func convertTarget(t client.Target) (target, error) {
|
|
|
+ h, ok := t.Hashes["sha256"]
|
|
|
+ if !ok {
|
|
|
+ return target{}, errors.New("no valid hash, expecting sha256")
|
|
|
+ }
|
|
|
+ return target{
|
|
|
+ reference: registry.ParseReference(t.Name),
|
|
|
+ digest: digest.NewDigestFromHex("sha256", hex.EncodeToString(h)),
|
|
|
+ size: t.Length,
|
|
|
+ }, nil
|
|
|
+}
|
|
|
+
|
|
|
+// TagTrusted tags a trusted ref
|
|
|
+func TagTrusted(ctx context.Context, cli *command.DockerCli, trustedRef reference.Canonical, ref reference.NamedTagged) error {
|
|
|
+ fmt.Fprintf(cli.Out(), "Tagging %s as %s\n", trustedRef.String(), ref.String())
|
|
|
+
|
|
|
+ return cli.Client().ImageTag(ctx, trustedRef.String(), ref.String())
|
|
|
+}
|
|
|
+
|
|
|
+// notaryError formats an error message received from the notary service
|
|
|
+func notaryError(repoName string, err error) error {
|
|
|
+ switch err.(type) {
|
|
|
+ case *json.SyntaxError:
|
|
|
+ logrus.Debugf("Notary syntax error: %s", err)
|
|
|
+ return fmt.Errorf("Error: no trust data available for remote repository %s. Try running notary server and setting DOCKER_CONTENT_TRUST_SERVER to its HTTPS address?", repoName)
|
|
|
+ case signed.ErrExpired:
|
|
|
+ return fmt.Errorf("Error: remote repository %s out-of-date: %v", repoName, err)
|
|
|
+ case trustmanager.ErrKeyNotFound:
|
|
|
+ return fmt.Errorf("Error: signing keys for remote repository %s not found: %v", repoName, err)
|
|
|
+ case *net.OpError:
|
|
|
+ return fmt.Errorf("Error: error contacting notary server: %v", err)
|
|
|
+ case store.ErrMetaNotFound:
|
|
|
+ return fmt.Errorf("Error: trust data missing for remote repository %s or remote repository not found: %v", repoName, err)
|
|
|
+ case signed.ErrInvalidKeyType:
|
|
|
+ return fmt.Errorf("Warning: potential malicious behavior - trust data mismatch for remote repository %s: %v", repoName, err)
|
|
|
+ case signed.ErrNoKeys:
|
|
|
+ return fmt.Errorf("Error: could not find signing keys for remote repository %s, or could not decrypt signing key: %v", repoName, err)
|
|
|
+ case signed.ErrLowVersion:
|
|
|
+ return fmt.Errorf("Warning: potential malicious behavior - trust data version is lower than expected for remote repository %s: %v", repoName, err)
|
|
|
+ case signed.ErrRoleThreshold:
|
|
|
+ return fmt.Errorf("Warning: potential malicious behavior - trust data has insufficient signatures for remote repository %s: %v", repoName, err)
|
|
|
+ case client.ErrRepositoryNotExist:
|
|
|
+ return fmt.Errorf("Error: remote trust data does not exist for %s: %v", repoName, err)
|
|
|
+ case signed.ErrInsufficientSignatures:
|
|
|
+ return fmt.Errorf("Error: could not produce valid signature for %s. If Yubikey was used, was touch input provided?: %v", repoName, err)
|
|
|
+ }
|
|
|
+
|
|
|
+ return err
|
|
|
+}
|
Daniel Nephin