Move the core state machine of SSLClientSocketNSS into a thread-safe Core

net/third_party/nss/ssl/sslinfo.c

 /* ***** BEGIN LICENSE BLOCK *****
  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
  *
  * The contents of this file are subject to the Mozilla Public License Version
  * 1.1 (the "License"); you may not use this file except in compliance with
  * the License. You may obtain a copy of the License at
  * http://www.mozilla.org/MPL/
  *
  * Software distributed under the License is distributed on an "AS IS" basis,
  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
@@ skipping 358 matching lines @@
     unsigned int valLen, i;
     SECStatus rv = SECFailure;
 
     ss = ssl_FindSocket(fd);
     if (!ss) {
         SSL_DBG(("%d: SSL[%d]: bad socket in ExportKeyingMaterial",
                  SSL_GETPID(), fd));
         return SECFailure;
     }
 
+    ssl_GetRecvBufLock(ss);
+    ssl_GetSSL3HandshakeLock(ss);
+
     if (ss->version < SSL_LIBRARY_VERSION_3_1_TLS) {
         PORT_SetError(SSL_ERROR_UNSUPPORTED_VERSION);
+        ssl_ReleaseSSL3HandshakeLock(ss);
+        ssl_ReleaseRecvBufLock(ss);
         return SECFailure;
     }
 
     /* construct PRF arguments */
     valLen = SSL3_RANDOM_LENGTH * 2;
     if (hasContext) {
         valLen += 2 /* uint16 length */ + contextLen;
     }
     val = PORT_Alloc(valLen);
     if (!val) {
+        ssl_ReleaseSSL3HandshakeLock(ss);
+        ssl_ReleaseRecvBufLock(ss);
         return SECFailure;
     }
     i = 0;
+
     PORT_Memcpy(val + i, &ss->ssl3.hs.client_random.rand, SSL3_RANDOM_LENGTH);
     i += SSL3_RANDOM_LENGTH;
     PORT_Memcpy(val + i, &ss->ssl3.hs.server_random.rand, SSL3_RANDOM_LENGTH);
     i += SSL3_RANDOM_LENGTH;
+
     if (hasContext) {
         val[i++] = contextLen >> 8;
         val[i++] = contextLen;
         PORT_Memcpy(val + i, context, contextLen);
         i += contextLen;
     }
     PORT_Assert(i == valLen);
 
     /* Allow TLS keying material to be exported sooner, when the master
      * secret is available and we have sent ChangeCipherSpec.
      */
     ssl_GetSpecReadLock(ss);
     if (!ss->ssl3.cwSpec->master_secret && !ss->ssl3.cwSpec->msItem.len) {
         PORT_SetError(SSL_ERROR_HANDSHAKE_NOT_COMPLETED);
         rv = SECFailure;
     } else {
         rv = ssl3_TLSPRFWithMasterSecret(ss->ssl3.cwSpec, label, labelLen, val,
                                          valLen, out, outLen);
     }
     ssl_ReleaseSpecReadLock(ss);
+    ssl_ReleaseSSL3HandshakeLock(ss);
+    ssl_ReleaseRecvBufLock(ss);
 
     PORT_ZFree(val, valLen);
     return rv;
 }