Merge remote-tracking branch 'remotes/kraxel/tags/pull-vnc-20150714-1…

…' into staging

vnc: fix vnc client authentication

# gpg: Signature made Tue Jul 14 14:38:48 2015 BST using RSA key ID D3E87138
# gpg: Good signature from "Gerd Hoffmann (work) <kraxel@redhat.com>"
# gpg:                 aka "Gerd Hoffmann <gerd@kraxel.org>"
# gpg:                 aka "Gerd Hoffmann (private) <kraxel@gmail.com>"

* remotes/kraxel/tags/pull-vnc-20150714-1:
  vnc: fix vnc client authentication

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

ui/vnc.c

@@ -2551,7 +2551,7 @@ static int protocol_client_auth_vnc(VncState *vs, uint8_t *data, size_t len)
         goto reject;
     }
 
-    if (qcrypto_cipher_decrypt(cipher,
+    if (qcrypto_cipher_encrypt(cipher,
                                vs->challenge,
                                response,
                                VNC_AUTH_CHALLENGE_SIZE,