Add regress coverage for tls_peer_cert_common_name()

2 files changed, 17 insertions, 0 deletions

diff --git a/src/regress/lib/libtls/gotls/tls.go b/src/regress/lib/libtls/gotls/tls.go
index cf3e84c030..3601828884 100644
--- a/src/regress/lib/libtls/gotls/tls.go
+++ b/src/regress/lib/libtls/gotls/tls.go
@@ -202,6 +202,15 @@ func (t *TLS) PeerCertIssuer() (string, error) {
         return C.GoString(issuer), nil
 }
 
+// PeerCertCommonName returns the common name of the peer certificate.
+func (t *TLS) PeerCertCommonName() (string, error) {
+        commonName := C.tls_peer_cert_common_name(t.ctx)
+        if commonName == nil {
+                return "", errors.New("no peer cert common name returned")
+        }
+        return C.GoString(commonName), nil
+}
+
 // PeerCertSubject returns the subject of the peer certificate.
 func (t *TLS) PeerCertSubject() (string, error) {
         subject := C.tls_peer_cert_subject(t.ctx)
diff --git a/src/regress/lib/libtls/gotls/tls_test.go b/src/regress/lib/libtls/gotls/tls_test.go
index 2b7ce2c19e..20240e0580 100644
--- a/src/regress/lib/libtls/gotls/tls_test.go
+++ b/src/regress/lib/libtls/gotls/tls_test.go
@@ -418,6 +418,9 @@ func TestTLSInfo(t *testing.T) {
         if _, err := tls.PeerCertSubject(); err == nil {
                 t.Error("PeerCertSubject() returned nil error, want error")
         }
+        if _, err := tls.PeerCertCommonName(); err == nil {
+                t.Error("PeerCertCommonName() returned nil error, want error")
+        }
         if _, err := tls.PeerCertHash(); err == nil {
                 t.Error("PeerCertHash() returned nil error, want error")
         }
@@ -468,6 +471,11 @@ func TestTLSInfo(t *testing.T) {
         } else {
                 t.Logf("Subject: %v", subject)
         }
+        if commonName, err := tls.PeerCertCommonName(); err != nil {
+                t.Errorf("PeerCertCommonName() returned error: %v", err)
+        } else {
+                t.Logf("Subject: %v", commonName)
+        }
         if hash, err := tls.PeerCertHash(); err != nil {
                 t.Errorf("PeerCertHash() returned error: %v", err)
         } else if hash != certHash {