e43b5ce5e5
This is possible now that we no longer support go1.12 and brings rclone into line with standard practices in the Go world. This also removes errors.New and errors.Errorf from lib/errors and prefers the stdlib errors package over lib/errors.
109 lines
3.3 KiB
Go
109 lines
3.3 KiB
Go
package cryptcheck
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import (
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"context"
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"fmt"
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"github.com/rclone/rclone/backend/crypt"
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"github.com/rclone/rclone/cmd"
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"github.com/rclone/rclone/cmd/check"
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"github.com/rclone/rclone/fs"
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"github.com/rclone/rclone/fs/hash"
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"github.com/rclone/rclone/fs/operations"
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"github.com/spf13/cobra"
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)
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func init() {
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cmd.Root.AddCommand(commandDefinition)
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cmdFlag := commandDefinition.Flags()
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check.AddFlags(cmdFlag)
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}
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var commandDefinition = &cobra.Command{
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Use: "cryptcheck remote:path cryptedremote:path",
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Short: `Cryptcheck checks the integrity of a crypted remote.`,
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Long: `
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rclone cryptcheck checks a remote against a crypted remote. This is
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the equivalent of running rclone check, but able to check the
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checksums of the crypted remote.
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For it to work the underlying remote of the cryptedremote must support
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some kind of checksum.
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It works by reading the nonce from each file on the cryptedremote: and
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using that to encrypt each file on the remote:. It then checks the
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checksum of the underlying file on the cryptedremote: against the
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checksum of the file it has just encrypted.
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Use it like this
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rclone cryptcheck /path/to/files encryptedremote:path
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You can use it like this also, but that will involve downloading all
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the files in remote:path.
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rclone cryptcheck remote:path encryptedremote:path
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After it has run it will log the status of the encryptedremote:.
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` + check.FlagsHelp,
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Run: func(command *cobra.Command, args []string) {
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cmd.CheckArgs(2, 2, command, args)
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fsrc, fdst := cmd.NewFsSrcDst(args)
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cmd.Run(false, true, command, func() error {
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return cryptCheck(context.Background(), fdst, fsrc)
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})
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},
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}
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// cryptCheck checks the integrity of a crypted remote
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func cryptCheck(ctx context.Context, fdst, fsrc fs.Fs) error {
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// Check to see fcrypt is a crypt
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fcrypt, ok := fdst.(*crypt.Fs)
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if !ok {
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return fmt.Errorf("%s:%s is not a crypt remote", fdst.Name(), fdst.Root())
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}
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// Find a hash to use
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funderlying := fcrypt.UnWrap()
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hashType := funderlying.Hashes().GetOne()
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if hashType == hash.None {
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return fmt.Errorf("%s:%s does not support any hashes", funderlying.Name(), funderlying.Root())
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}
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fs.Infof(nil, "Using %v for hash comparisons", hashType)
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opt, close, err := check.GetCheckOpt(fsrc, fcrypt)
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if err != nil {
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return err
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}
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defer close()
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// checkIdentical checks to see if dst and src are identical
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//
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// it returns true if differences were found
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// it also returns whether it couldn't be hashed
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opt.Check = func(ctx context.Context, dst, src fs.Object) (differ bool, noHash bool, err error) {
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cryptDst := dst.(*crypt.Object)
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underlyingDst := cryptDst.UnWrap()
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underlyingHash, err := underlyingDst.Hash(ctx, hashType)
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if err != nil {
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return true, false, fmt.Errorf("error reading hash from underlying %v: %w", underlyingDst, err)
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}
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if underlyingHash == "" {
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return false, true, nil
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}
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cryptHash, err := fcrypt.ComputeHash(ctx, cryptDst, src, hashType)
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if err != nil {
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return true, false, fmt.Errorf("error computing hash: %w", err)
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}
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if cryptHash == "" {
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return false, true, nil
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}
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if cryptHash != underlyingHash {
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err = fmt.Errorf("hashes differ (%s:%s) %q vs (%s:%s) %q", fdst.Name(), fdst.Root(), cryptHash, fsrc.Name(), fsrc.Root(), underlyingHash)
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fs.Errorf(src, err.Error())
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return true, false, nil
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}
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return false, false, nil
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}
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return operations.CheckFn(ctx, opt)
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}
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