Implement symmetric key for openssl

base/openssl_util.cc

+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/logging.h"
+#include "base/openssl_util.h"
+
+#include <openssl/err.h>
+
+namespace base {
+
+void ClearERRStack() {
+  if (logging::DEBUG_MODE && VLOG_IS_ON(1)) { 
+    int error_num = ERR_get_error();
+    if (error_num == 0)
+      return;
+
+    DVLOG(1) << "SSL error stack:";

[Ryan Sleevi, 2010/11/11 18:07:15]

nit: s/SSL/OpenSSL/ 

There is a separate SSL error stack (SSL_get_error), which runs on top
of/parallel to the OpenSSL error stack (some is maintained in the error queue,
some in the SSL*). 

[joth, 2010/11/11 19:54:36]

Done.

+    char buf[140];
+    do {
+      ERR_error_string_n(error_num, buf, arraysize(buf));
+      DVLOG(1) << "\t" << error_num << ": " << buf;
+      error_num = ERR_get_error();
+    } while (error_num != 0);
+  } else {
+    ERR_clear_error();
+  }
+}
+
+}  // namespace base