// NewDetachedSignature creates a new openpgp armored detached signature for the given ACI
// signed with armoredPrivateKey.
func NewDetachedSignature(armoredPrivateKey string, aci io.Reader) (io.Reader, error) {
entityList, err := openpgp.ReadArmoredKeyRing(bytes.NewBufferString(armoredPrivateKey))
if err != nil {
return nil, err
}
if len(entityList) < 1 {
return nil, errors.New("empty entity list")
}
signature := &bytes.Buffer{}
if err := openpgp.ArmoredDetachSign(signature, entityList[0], aci, nil); err != nil {
return nil, err
}
return signature, nil
}
// NewMessageAndSignature generates a new random message signed by the given entity.
// NewMessageAndSignature returns message, signature and an error if any.
func NewMessageAndSignature(armoredPrivateKey string) (io.ReadSeeker, io.ReadSeeker, error) {
entityList, err := openpgp.ReadArmoredKeyRing(bytes.NewBufferString(armoredPrivateKey))
if err != nil {
return nil, nil, err
}
if len(entityList) < 1 {
return nil, nil, errors.New("empty entity list")
}
signature := &bytes.Buffer{}
message := []byte("data")
if err := openpgp.ArmoredDetachSign(signature, entityList[0], bytes.NewReader(message), nil); err != nil {
return nil, nil, err
}
return bytes.NewReader(message), bytes.NewReader(signature.Bytes()), nil
}
