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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.HashFromHex(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
}
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