RTCPeerConnection.generateCertificate taking AlgorithmIdentifier and using WebCrypto

third_party/WebKit/Source/platform/exported/WebCryptoUtil.cpp

+// Copyright 2015 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 "config.h"
+#include "public/platform/WebCryptoUtil.h"
+
+namespace blink {
+
+bool bigIntegerToUint(const WebVector<unsigned char>& bigInteger, unsigned& result)
+{
+    result = 0;
+    for (size_t i = 0; i < bigInteger.size(); ++i) {
+        size_t iReversed = bigInteger.size() - i - 1;
+
+        if (iReversed >= sizeof(result) && bigInteger[i])
+            return false; // Too large for unsigned int.
+
+        result |= bigInteger[i] << 8 * iReversed;
+    }
+    return true;
+}
+
+} // namespace blink