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key: Check that a new key file actually works

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This commit is contained in:
Michael Eischer 2020-09-20 00:37:58 +02:00
parent a476752962
commit 6add186867
1 changed files with 25 additions and 1 deletions
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26
cmd/restic/cmd_key.go
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@ -131,6 +131,11 @@ func addKey(gopts GlobalOptions, repo *repository.Repository) error {
return errors.Fatalf("creating new key failed: %v\n", err)
}
err = switchToNewKeyAndRemoveIfBroken(gopts.ctx, repo, id, pw)
if err != nil {
return err
}
Verbosef("saved new key as %s\n", id)
return nil
@ -161,8 +166,14 @@ func changePassword(gopts GlobalOptions, repo *repository.Repository) error {
if err != nil {
return errors.Fatalf("creating new key failed: %v\n", err)
}
oldID := repo.KeyName()
h := restic.Handle{Type: restic.KeyFile, Name: repo.KeyName()}
err = switchToNewKeyAndRemoveIfBroken(gopts.ctx, repo, id, pw)
if err != nil {
return err
}
h := restic.Handle{Type: restic.KeyFile, Name: oldID}
err = repo.Backend().Remove(gopts.ctx, h)
if err != nil {
return err
@ -173,6 +184,19 @@ func changePassword(gopts GlobalOptions, repo *repository.Repository) error {
return nil
}
func switchToNewKeyAndRemoveIfBroken(ctx context.Context, repo *repository.Repository, key *repository.Key, pw string) error {
// Verify new key to make sure it really works. A broken key can render the
// whole repository inaccessible
err := repo.SearchKey(ctx, pw, 0, key.Name())
if err != nil {
// the key is invalid, try to remove it
h := restic.Handle{Type: restic.KeyFile, Name: key.Name()}
_ = repo.Backend().Remove(ctx, h)
return errors.Fatalf("failed to access repository with new key: %v", err)
}
return nil
}
func runKey(gopts GlobalOptions, args []string) error {
if len(args) < 1 || (args[0] == "remove" && len(args) != 2) || (args[0] != "remove" && len(args) != 1) {
return errors.Fatal("wrong number of arguments")