57 lines
1.7 KiB
Go
57 lines
1.7 KiB
Go
package daemon
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import (
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"encoding/json"
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"encoding/pem"
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"fmt"
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"os"
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"path/filepath"
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"github.com/docker/docker/pkg/ioutils"
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"github.com/docker/docker/pkg/system"
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"github.com/docker/libtrust"
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)
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// LoadOrCreateTrustKey attempts to load the libtrust key at the given path,
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// otherwise generates a new one
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// TODO: this should use more of libtrust.LoadOrCreateTrustKey which may need
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// a refactor or this function to be moved into libtrust
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func loadOrCreateTrustKey(trustKeyPath string) (libtrust.PrivateKey, error) {
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err := system.MkdirAll(filepath.Dir(trustKeyPath), 0700, "")
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if err != nil {
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return nil, err
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}
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trustKey, err := libtrust.LoadKeyFile(trustKeyPath)
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if err == libtrust.ErrKeyFileDoesNotExist {
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trustKey, err = libtrust.GenerateECP256PrivateKey()
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if err != nil {
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return nil, fmt.Errorf("Error generating key: %s", err)
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}
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encodedKey, err := serializePrivateKey(trustKey, filepath.Ext(trustKeyPath))
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if err != nil {
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return nil, fmt.Errorf("Error serializing key: %s", err)
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}
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if err := ioutils.AtomicWriteFile(trustKeyPath, encodedKey, os.FileMode(0600)); err != nil {
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return nil, fmt.Errorf("Error saving key file: %s", err)
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}
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} else if err != nil {
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return nil, fmt.Errorf("Error loading key file %s: %s", trustKeyPath, err)
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}
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return trustKey, nil
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}
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func serializePrivateKey(key libtrust.PrivateKey, ext string) (encoded []byte, err error) {
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if ext == ".json" || ext == ".jwk" {
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encoded, err = json.Marshal(key)
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if err != nil {
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return nil, fmt.Errorf("unable to encode private key JWK: %s", err)
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}
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} else {
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pemBlock, err := key.PEMBlock()
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if err != nil {
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return nil, fmt.Errorf("unable to encode private key PEM: %s", err)
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}
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encoded = pem.EncodeToMemory(pemBlock)
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}
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return
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}
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