package cryptcheck import (	"context" 	"github.com/pkg/errors"	"github.com/rclone/rclone/backend/crypt"	"github.com/rclone/rclone/cmd"	"github.com/rclone/rclone/cmd/check"	"github.com/rclone/rclone/fs"	"github.com/rclone/rclone/fs/hash"	"github.com/rclone/rclone/fs/operations"	"github.com/spf13/cobra") func init() {	cmd.Root.AddCommand(commandDefinition)	cmdFlag := commandDefinition.Flags()	check.AddFlags(cmdFlag)} var commandDefinition = &cobra.Command{	Use:   "cryptcheck remote:path cryptedremote:path",	Short: `Cryptcheck checks the integrity of a crypted remote.`,	Long: `rclone cryptcheck checks a remote against a crypted remote.  This isthe equivalent of running rclone check, but able to check thechecksums of the crypted remote. For it to work the underlying remote of the cryptedremote must supportsome kind of checksum. It works by reading the nonce from each file on the cryptedremote: andusing that to encrypt each file on the remote:.  It then checks thechecksum of the underlying file on the cryptedremote: against thechecksum of the file it has just encrypted. Use it like this     rclone cryptcheck /path/to/files encryptedremote:path You can use it like this also, but that will involve downloading allthe files in remote:path.     rclone cryptcheck remote:path encryptedremote:path After it has run it will log the status of the encryptedremote:.` + check.FlagsHelp,	Run: func(command *cobra.Command, args []string) {		cmd.CheckArgs(2, 2, command, args)		fsrc, fdst := cmd.NewFsSrcDst(args)		cmd.Run(false, true, command, func() error {			return cryptCheck(context.Background(), fdst, fsrc)		})	},} // cryptCheck checks the integrity of a crypted remotefunc cryptCheck(ctx context.Context, fdst, fsrc fs.Fs) error {	// Check to see fcrypt is a crypt	fcrypt, ok := fdst.(*crypt.Fs)	if !ok {		return errors.Errorf("%s:%s is not a crypt remote", fdst.Name(), fdst.Root())	}	// Find a hash to use	funderlying := fcrypt.UnWrap()	hashType := funderlying.Hashes().GetOne()	if hashType == hash.None {		return errors.Errorf("%s:%s does not support any hashes", funderlying.Name(), funderlying.Root())	}	fs.Infof(nil, "Using %v for hash comparisons", hashType) 	opt, close, err := check.GetCheckOpt(fsrc, fcrypt)	if err != nil {		return err	}	defer close() 	// checkIdentical checks to see if dst and src are identical	//	// it returns true if differences were found	// it also returns whether it couldn't be hashed	opt.Check = func(ctx context.Context, dst, src fs.Object) (differ bool, noHash bool, err error) {		cryptDst := dst.(*crypt.Object)		underlyingDst := cryptDst.UnWrap()		underlyingHash, err := underlyingDst.Hash(ctx, hashType)		if err != nil {			return true, false, errors.Wrapf(err, "error reading hash from underlying %v", underlyingDst)		}		if underlyingHash == "" {			return false, true, nil		}		cryptHash, err := fcrypt.ComputeHash(ctx, cryptDst, src, hashType)		if err != nil {			return true, false, errors.Wrap(err, "error computing hash")		}		if cryptHash == "" {			return false, true, nil		}		if cryptHash != underlyingHash {			err = errors.Errorf("hashes differ (%s:%s) %q vs (%s:%s) %q", fdst.Name(), fdst.Root(), cryptHash, fsrc.Name(), fsrc.Root(), underlyingHash)			fs.Errorf(src, err.Error())			return true, false, nil		}		return false, false, nil	} 	return operations.CheckFn(ctx, opt)}