Support a message to be passed and logged from client to server (#67)

* Support a message to be passed and logged from client to server

2 files changed, 5 insertions, 0 deletions

diff --git a/server/signer/signer.go b/server/signer/signer.go
index 2a8fc98..47ff7c8 100644
--- a/server/signer/signer.go
+++ b/server/signer/signer.go
@@ -62,6 +62,7 @@ func (s *KeySigner) SignUserKeyFromRPC(req *proto.SignRequest, username string)
 	r := &lib.SignRequest{
 		Key:        string(req.GetKey()),
 		ValidUntil: valid,
+		Message:    string(req.GetMessage()),
 	}
 	return s.SignUserKey(r, username)
 }
@@ -89,6 +90,9 @@ func (s *KeySigner) SignUserKey(req *lib.SignRequest, username string) (*ssh.Cer
 	if err := cert.SignCert(rand.Reader, s.ca); err != nil {
 		return nil, err
 	}
+	if req.Message != "" {
+		log.Printf("Message from %s: %s", username, req.Message)
+	}
 	log.Printf("Issued cert id: %s principals: %s fp: %s valid until: %s\n", cert.KeyId, cert.ValidPrincipals, ssh.FingerprintSHA256(pubkey), time.Unix(int64(cert.ValidBefore), 0).UTC())
 	return cert, nil
 }
diff --git a/server/signer/signer_test.go b/server/signer/signer_test.go
index 726a69b..c07d62b 100644
--- a/server/signer/signer_test.go
+++ b/server/signer/signer_test.go
@@ -28,6 +28,7 @@ func TestCert(t *testing.T) {
 	r := &lib.SignRequest{
 		Key:        string(testdata.Pub),
 		ValidUntil: time.Now().Add(1 * time.Hour),
+		Message:    "hello world",
 	}
 	cert, err := signer.SignUserKey(r, "gopher1")
 	if err != nil {