Function injectGpgSig

tests/objectverify/main_test.go:354–369

(unsigned []byte, sig string)

}

func injectGpgSig(unsigned []byte, sig string) []byte {
	sep := []byte("\n\n")
	idx := bytes.Index(unsigned, sep)
	if idx < 0 {
		panic("injectGpgSig: no header/body separator")
	}
	sig = strings.TrimSuffix(sig, "\n")
	indented := strings.ReplaceAll(sig, "\n", "\n ")
	headerLine := "gpgsig " + indented + "\n"

	var buf bytes.Buffer
	buf.Write(unsigned[:idx+1]) // up to and including the \n that ends the last header
	buf.WriteString(headerLine) // gpgsig + indented sig + closing \n
	buf.Write(unsigned[idx+1:]) // empty-line \n + body
	return buf.Bytes()
}