- Peter Sylvester made the HTTPS test server use specific certificates for

each test, so that the test suite can now be used to actually test the
  verification of cert names etc. This made an error show up in the OpenSSL-
  specific code where it would attempt to match the CN field even if a
  subjectAltName exists that doesn't match. This is now fixed and verified
  in test 311.

lib/ssluse.c

@@ -1137,6 +1137,12 @@ static CURLcode verifyhost(struct connectdata *conn,
   if(matched)
     /* an alternative name matched the server hostname */
     infof(data, "\t subjectAltName: %s matched\n", conn->host.dispname);
+  else if(altnames) {
+    /* an alternative name field existed, but didn't match and then
+       we MUST fail */
+    infof(data, "\t subjectAltName does not match %s\n", conn->host.dispname);
+    res = CURLE_PEER_FAILED_VERIFICATION;
+  }
   else {
     /* we have to look to the last occurence of a commonName in the
        distinguished one to get the most significant one. */