Display SHA512 digest when signer app is loaded

Author: Niels Möller

cmd/tkey-ssh-agent/apps.go

@@ -41,11 +41,11 @@ func ListApps() []EmbeddedApp {
 	list := []EmbeddedApp{
 		{
 			name:   "tkey-device-signer 1.0.2",
-			digest: embeddedAppDigest(appBinaryPreCastor),
+			digest: AppDigest(appBinaryPreCastor),
 		},
 		{
 			name:   "tkey-device-signer castor-alpha-1",
-			digest: embeddedAppDigest(appBinaryCastor),
+			digest: AppDigest(appBinaryCastor),
 		},
 	}
 
@@ -69,7 +69,7 @@ func GetApp(pid uint8) ([]byte, error) {
 	return nil, ErrNotFound
 }
 
-func embeddedAppDigest(bin []byte) string {
+func AppDigest(bin []byte) string {
 	digest := sha512.Sum512(bin)
 	return hex.EncodeToString(digest[:])
 }

cmd/tkey-ssh-agent/signer.go

@@ -195,7 +195,7 @@ func (s *Signer) loadApp(devApp []byte, udi tkeyclient.UDI) error {
 		}
 	}
 
-	le.Printf("Loading signer app...\n")
+	le.Printf("Loading signer app...\nSHA512: %s\n", AppDigest(devApp))
 	if err := s.tk.LoadApp(devApp, secret); err != nil {
 		return fmt.Errorf("LoadApp: %w", err)
 	}