diff -pu a/nss/lib/ssl/ssl3con.c b/nss/lib/ssl/ssl3con.c
--- a/nss/lib/ssl/ssl3con.c	2014-01-17 17:55:01.518095989 -0800
+++ b/nss/lib/ssl/ssl3con.c	2014-01-17 17:55:19.158389328 -0800
@@ -7199,6 +7199,85 @@ done:
     return rv;
 }
 
+/*
+ * attempt to restart the handshake after asynchronously handling
+ * a request for the client's certificate.
+ *
+ * inputs:
+ *	cert	Client cert chosen by application.
+ *		Note: ssl takes this reference, and does not bump the
+ *		reference count.  The caller should drop its reference
+ *		without calling CERT_DestroyCert after calling this function.
+ *
+ *	key	Private key associated with cert.  This function takes
+ *		ownership of the private key, so the caller should drop its
+ *		reference without destroying the private key after this
+ *		function returns.
+ *
+ *	certChain  DER-encoded certs, client cert and its signers.
+ *		Note: ssl takes this reference, and does not copy the chain.
+ *		The caller should drop its reference without destroying the
+ *		chain.  SSL will free the chain when it is done with it.
+ *
+ * Return value: XXX
+ *
+ * XXX This code only works on the initial handshake on a connection, XXX
+ *     It does not work on a subsequent handshake (redo).
+ *
+ * Caller holds 1stHandshakeLock.
+ */
+SECStatus
+ssl3_RestartHandshakeAfterCertReq(sslSocket *         ss,
+				CERTCertificate *    cert,
+				SECKEYPrivateKey *   key,
+				CERTCertificateList *certChain)
+{
+    SECStatus        rv          = SECSuccess;
+
+    /* XXX This code only works on the initial handshake on a connection,
+    ** XXX It does not work on a subsequent handshake (redo).
+    */
+    if (ss->handshake != 0) {
+	ss->handshake              = ssl_GatherRecord1stHandshake;
+	ss->ssl3.clientCertificate = cert;
+	ss->ssl3.clientPrivateKey  = key;
+	ss->ssl3.clientCertChain   = certChain;
+        if (!cert || !key || !certChain) {
+            /* we are missing the key, cert, or cert chain */
+            if (ss->ssl3.clientCertificate) {
+                CERT_DestroyCertificate(ss->ssl3.clientCertificate);
+                ss->ssl3.clientCertificate = NULL;
+            }
+            if (ss->ssl3.clientPrivateKey) {
+                SECKEY_DestroyPrivateKey(ss->ssl3.clientPrivateKey);
+                ss->ssl3.clientPrivateKey = NULL;
+            }
+            if (ss->ssl3.clientCertChain != NULL) {
+                CERT_DestroyCertificateList(ss->ssl3.clientCertChain);
+                ss->ssl3.clientCertChain = NULL;
+            }
+            if (ss->ssl3.prSpec->version > SSL_LIBRARY_VERSION_3_0) {
+                ss->ssl3.sendEmptyCert = PR_TRUE;
+            } else {
+                (void)SSL3_SendAlert(ss, alert_warning, no_certificate);
+            }
+	}
+    } else {
+	if (cert) {
+	    CERT_DestroyCertificate(cert);
+	}
+	if (key) {
+	    SECKEY_DestroyPrivateKey(key);
+	}
+	if (certChain) {
+	    CERT_DestroyCertificateList(certChain);
+	}
+	PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
+	rv = SECFailure;
+    }
+    return rv;
+}
+
 static SECStatus
 ssl3_CheckFalseStart(sslSocket *ss)
 {
diff -pu a/nss/lib/ssl/ssl.h b/nss/lib/ssl/ssl.h
--- a/nss/lib/ssl/ssl.h	2014-01-17 17:55:01.538096321 -0800
+++ b/nss/lib/ssl/ssl.h	2014-01-17 17:55:19.158389328 -0800
@@ -399,6 +399,11 @@ SSL_IMPORT SECStatus SSL_ForceHandshake(
 SSL_IMPORT SECStatus SSL_ForceHandshakeWithTimeout(PRFileDesc *fd,
                                                    PRIntervalTime timeout);
 
+SSL_IMPORT SECStatus SSL_RestartHandshakeAfterCertReq(PRFileDesc *fd,
+					    CERTCertificate *cert,
+					    SECKEYPrivateKey *key,
+					    CERTCertificateList *certChain);
+
 /*
 ** Query security status of socket. *on is set to one if security is
 ** enabled. *keySize will contain the stream key size used. *issuer will
diff -pu a/nss/lib/ssl/sslimpl.h b/nss/lib/ssl/sslimpl.h
--- a/nss/lib/ssl/sslimpl.h	2014-01-17 17:55:01.538096321 -0800
+++ b/nss/lib/ssl/sslimpl.h	2014-01-17 17:55:19.158389328 -0800
@@ -1588,16 +1588,17 @@ extern  SECStatus ssl3_MasterKeyDeriveBy
 /* These functions are called from secnav, even though they're "private". */
 
 extern int ssl2_SendErrorMessage(struct sslSocketStr *ss, int error);
-extern int SSL_RestartHandshakeAfterCertReq(struct sslSocketStr *ss,
-					    CERTCertificate *cert,
-					    SECKEYPrivateKey *key,
-					    CERTCertificateList *certChain);
 extern sslSocket *ssl_FindSocket(PRFileDesc *fd);
 extern void ssl_FreeSocket(struct sslSocketStr *ssl);
 extern SECStatus SSL3_SendAlert(sslSocket *ss, SSL3AlertLevel level,
 				SSL3AlertDescription desc);
 extern SECStatus ssl3_DecodeError(sslSocket *ss);
 
+extern SECStatus ssl3_RestartHandshakeAfterCertReq(sslSocket *    ss,
+					     CERTCertificate *    cert, 
+					     SECKEYPrivateKey *   key,
+					     CERTCertificateList *certChain);
+
 extern SECStatus ssl3_AuthCertificateComplete(sslSocket *ss, PRErrorCode error);
 
 /*
diff -pu a/nss/lib/ssl/sslsecur.c b/nss/lib/ssl/sslsecur.c
--- a/nss/lib/ssl/sslsecur.c	2014-01-17 17:49:26.072517368 -0800
+++ b/nss/lib/ssl/sslsecur.c	2014-01-17 17:55:19.158389328 -0800
@@ -1518,17 +1518,70 @@ SSL_CertDBHandleSet(PRFileDesc *fd, CERT
     return SECSuccess;
 }
 
-/* DO NOT USE. This function was exported in ssl.def with the wrong signature;
- * this implementation exists to maintain link-time compatibility.
+/*
+ * attempt to restart the handshake after asynchronously handling
+ * a request for the client's certificate.
+ *
+ * inputs:  
+ *	cert	Client cert chosen by application.
+ *		Note: ssl takes this reference, and does not bump the 
+ *		reference count.  The caller should drop its reference
+ *		without calling CERT_DestroyCertificate after calling this
+ *		function.
+ *
+ *	key	Private key associated with cert.  This function takes
+ *		ownership of the private key, so the caller should drop its
+ *		reference without destroying the private key after this
+ *		function returns.
+ *
+ *	certChain  Chain of signers for cert.  
+ *		Note: ssl takes this reference, and does not copy the chain.
+ *		The caller should drop its reference without destroying the 
+ *		chain.  SSL will free the chain when it is done with it.
+ *
+ * Return value: XXX
+ *
+ * XXX This code only works on the initial handshake on a connection, XXX
+ *     It does not work on a subsequent handshake (redo).
  */
-int
-SSL_RestartHandshakeAfterCertReq(sslSocket *         ss,
+SECStatus
+SSL_RestartHandshakeAfterCertReq(PRFileDesc *        fd,
 				CERTCertificate *    cert, 
 				SECKEYPrivateKey *   key,
 				CERTCertificateList *certChain)
 {
-    PORT_SetError(PR_NOT_IMPLEMENTED_ERROR);
-    return -1;
+    sslSocket *   ss = ssl_FindSocket(fd);
+    SECStatus     ret;
+
+    if (!ss) {
+	SSL_DBG(("%d: SSL[%d]: bad socket in SSL_RestartHandshakeAfterCertReq",
+		 SSL_GETPID(), fd));
+	if (cert) {
+	    CERT_DestroyCertificate(cert);
+	}
+	if (key) {
+	    SECKEY_DestroyPrivateKey(key);
+	}
+	if (certChain) {
+	    CERT_DestroyCertificateList(certChain);
+	}
+	return SECFailure;
+    }
+
+    ssl_Get1stHandshakeLock(ss);   /************************************/
+
+    if (ss->version >= SSL_LIBRARY_VERSION_3_0) {
+	ret = ssl3_RestartHandshakeAfterCertReq(ss, cert, key, certChain);
+    } else {
+	if (certChain != NULL) {
+	    CERT_DestroyCertificateList(certChain);
+	}
+	PORT_SetError(SSL_ERROR_FEATURE_NOT_SUPPORTED_FOR_SSL2);
+	ret = SECFailure;
+    }
+
+    ssl_Release1stHandshakeLock(ss);  /************************************/
+    return ret;
 }
 
 /* DO NOT USE. This function was exported in ssl.def with the wrong signature;