95 lines
2.8 KiB
Go
95 lines
2.8 KiB
Go
/*
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Copyright The containerd Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package images
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import (
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"fmt"
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"github.com/containerd/containerd/cmd/ctr/commands"
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imgenc "github.com/containerd/containerd/images/encryption"
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"github.com/pkg/errors"
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"github.com/urfave/cli"
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)
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var decryptCommand = cli.Command{
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Name: "decrypt",
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Usage: "decrypt an image locally",
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ArgsUsage: "[flags] <local> <new name>",
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Description: `Decrypt an image locally.
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Decrypt an image using private keys.
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The user has contol over which layers to decrypt and for which platform.
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If no payers or platforms are specified, all layers for all platforms are
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decrypted.
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Private keys in PEM format may be encrypted and the password may be passed
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along in any of the following formats:
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- <filename>:<password>
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- <filename>:pass=<password>
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- <filename>:fd=<file descriptor>
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- <filename>:filename=<password file>
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`,
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Flags: append(append(commands.RegistryFlags, cli.IntSliceFlag{
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Name: "layer",
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Usage: "The layer to decrypt; this must be either the layer number or a negative number starting with -1 for topmost layer",
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}, cli.StringSliceFlag{
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Name: "platform",
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Usage: "For which platform to decrypt; by default decryption is done for all platforms",
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},
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), commands.ImageDecryptionFlags...),
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Action: func(context *cli.Context) error {
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local := context.Args().First()
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if local == "" {
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return errors.New("please provide the name of an image to decrypt")
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}
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newName := context.Args().Get(1)
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if newName != "" {
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fmt.Printf("Decrypting %s to %s\n", local, newName)
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} else {
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fmt.Printf("Decrypting %s and replacing it with the decrypted image\n", local)
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}
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client, ctx, cancel, err := commands.NewClient(context)
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if err != nil {
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return err
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}
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defer cancel()
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layers32 := commands.IntToInt32Array(context.IntSlice("layer"))
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_, descs, err := getImageLayerInfos(client, ctx, local, layers32, context.StringSlice("platform"))
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if err != nil {
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return err
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}
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isEncrypted := imgenc.HasEncryptedLayer(ctx, descs)
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if !isEncrypted {
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fmt.Printf("Nothing to decrypted.\n")
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return nil
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}
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cc, err := CreateDecryptCryptoConfig(context, descs)
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if err != nil {
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return err
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}
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_, err = decryptImage(client, ctx, local, newName, &cc, layers32, context.StringSlice("platform"))
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return err
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},
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}
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