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package gpg
import (
"bytes"
"fmt"
"strings"
"github.com/ProtonMail/go-crypto/openpgp"
"github.com/ProtonMail/go-crypto/openpgp/packet"
)
// CreateSignature creates a gpg signature
func CreateSignature(key []byte, contentToSign []byte) ([]byte, error) {
entity, err := openpgp.ReadEntity(packet.NewReader(bytes.NewReader(key)))
if err != nil {
return nil, fmt.Errorf("read entity: %w", err)
}
var sigBuf strings.Builder
if err := openpgp.ArmoredDetachSignText(
&sigBuf,
entity,
bytes.NewReader(contentToSign),
&packet.Config{},
); err != nil {
return nil, fmt.Errorf("sign commit: %w", err)
}
return []byte(sigBuf.String()), nil
}
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