mirror of https://github.com/docker/cli.git
116 lines
3.9 KiB
Go
116 lines
3.9 KiB
Go
package trust
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import (
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"bytes"
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"encoding/pem"
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"fmt"
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"io/ioutil"
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"os"
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"github.com/docker/cli/cli"
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"github.com/docker/cli/cli/command"
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"github.com/docker/cli/cli/trust"
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"github.com/pkg/errors"
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"github.com/spf13/cobra"
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"github.com/theupdateframework/notary"
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"github.com/theupdateframework/notary/storage"
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"github.com/theupdateframework/notary/trustmanager"
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tufutils "github.com/theupdateframework/notary/tuf/utils"
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)
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const (
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nonOwnerReadWriteMask = 0077
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)
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type keyLoadOptions struct {
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keyName string
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}
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func newKeyLoadCommand(dockerCli command.Streams) *cobra.Command {
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var options keyLoadOptions
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cmd := &cobra.Command{
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Use: "load [OPTIONS] KEYFILE",
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Short: "Load a private key file for signing",
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Args: cli.ExactArgs(1),
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RunE: func(cmd *cobra.Command, args []string) error {
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return loadPrivKey(dockerCli, args[0], options)
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},
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}
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flags := cmd.Flags()
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flags.StringVar(&options.keyName, "name", "signer", "Name for the loaded key")
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return cmd
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}
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func loadPrivKey(streams command.Streams, keyPath string, options keyLoadOptions) error {
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// validate the key name if provided
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if options.keyName != "" && !validKeyName(options.keyName) {
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return fmt.Errorf("key name \"%s\" must start with lowercase alphanumeric characters and can include \"-\" or \"_\" after the first character", options.keyName)
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}
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trustDir := trust.GetTrustDirectory()
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keyFileStore, err := storage.NewPrivateKeyFileStorage(trustDir, notary.KeyExtension)
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if err != nil {
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return err
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}
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privKeyImporters := []trustmanager.Importer{keyFileStore}
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fmt.Fprintf(streams.Out(), "Loading key from \"%s\"...\n", keyPath)
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// Always use a fresh passphrase retriever for each import
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passRet := trust.GetPassphraseRetriever(streams.In(), streams.Out())
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keyBytes, err := getPrivKeyBytesFromPath(keyPath)
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if err != nil {
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return errors.Wrapf(err, "refusing to load key from %s", keyPath)
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}
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if err := loadPrivKeyBytesToStore(keyBytes, privKeyImporters, keyPath, options.keyName, passRet); err != nil {
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return errors.Wrapf(err, "error importing key from %s", keyPath)
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}
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fmt.Fprintf(streams.Out(), "Successfully imported key from %s\n", keyPath)
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return nil
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}
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func getPrivKeyBytesFromPath(keyPath string) ([]byte, error) {
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fileInfo, err := os.Stat(keyPath)
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if err != nil {
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return nil, err
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}
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if fileInfo.Mode()&nonOwnerReadWriteMask != 0 {
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return nil, fmt.Errorf("private key file %s must not be readable or writable by others", keyPath)
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}
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from, err := os.OpenFile(keyPath, os.O_RDONLY, notary.PrivExecPerms)
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if err != nil {
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return nil, err
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}
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defer from.Close()
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return ioutil.ReadAll(from)
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}
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func loadPrivKeyBytesToStore(privKeyBytes []byte, privKeyImporters []trustmanager.Importer, keyPath, keyName string, passRet notary.PassRetriever) error {
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var err error
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if _, _, err = tufutils.ExtractPrivateKeyAttributes(privKeyBytes); err != nil {
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return fmt.Errorf("provided file %s is not a supported private key - to add a signer's public key use docker trust signer add", keyPath)
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}
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if privKeyBytes, err = decodePrivKeyIfNecessary(privKeyBytes, passRet); err != nil {
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return errors.Wrapf(err, "cannot load key from provided file %s", keyPath)
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}
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// Make a reader, rewind the file pointer
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return trustmanager.ImportKeys(bytes.NewReader(privKeyBytes), privKeyImporters, keyName, "", passRet)
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}
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func decodePrivKeyIfNecessary(privPemBytes []byte, passRet notary.PassRetriever) ([]byte, error) {
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pemBlock, _ := pem.Decode(privPemBytes)
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_, containsDEKInfo := pemBlock.Headers["DEK-Info"]
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if containsDEKInfo || pemBlock.Type == "ENCRYPTED PRIVATE KEY" {
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// if we do not have enough information to properly import, try to decrypt the key
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if _, ok := pemBlock.Headers["path"]; !ok {
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privKey, _, err := trustmanager.GetPasswdDecryptBytes(passRet, privPemBytes, "", "encrypted")
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if err != nil {
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return []byte{}, fmt.Errorf("could not decrypt key")
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}
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privPemBytes = privKey.Private()
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}
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}
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return privPemBytes, nil
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}
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