package sign import ( "bytes" "fmt" "strings" "git.sigsum.org/sigsum-go/internal/fmtio" "git.sigsum.org/sigsum-go/pkg/hex" "git.sigsum.org/sigsum-go/pkg/types" ) func Main(args []string, optPrivateKey, optKeyHash string) error { if len(args) != 0 { return fmt.Errorf("trailing arguments: %s", strings.Join(args, ", ")) } b, err := fmtio.BytesFromStdin() if err != nil { return fmt.Errorf("read stdin: %w", err) } priv, err := fmtio.SignerFromHex(optPrivateKey) if err != nil { return fmt.Errorf("parse private key: %v", err) } keyHash, err := fmtio.KeyHashFromHex(optKeyHash) if err != nil { return fmt.Errorf("parse key hash: %v", err) } var input types.SignedTreeHead if err := input.FromASCII(bytes.NewBuffer(b)); err != nil { return fmt.Errorf("parse signed tree head: %v", err) } output, err := input.TreeHead.Sign(priv, &keyHash) if err != nil { return fmt.Errorf("sign tree head: %v", err) } fmt.Printf("%s\n", hex.Serialize(output.Signature[:])) return nil }