aerc/lib/crypto/gpg/gpgbin/sign.go

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package gpgbin
import (
"bytes"
"fmt"
"io"
"git.sr.ht/~rjarry/aerc/models"
)
// Sign creates a detached signature based on the contents of r
func Sign(r io.Reader, from string) ([]byte, string, error) {
args := []string{
"--armor",
"--detach-sign",
"--default-key", from,
}
g := newGpg(r, args)
g.cmd.Run()
outRdr := bytes.NewReader(g.stdout.Bytes())
var md models.MessageDetails
err := parse(outRdr, &md)
if err != nil {
return nil, "", fmt.Errorf("failed to parse messagedetails: %v", err)
}
var buf bytes.Buffer
io.Copy(&buf, md.Body)
return buf.Bytes(), md.Micalg, nil
}