WebCrypto: Add framework for AlgorithmIdentifier normalization.

Source/core/platform/chromium/support/WebCryptoAlgorithm.cpp

+/*
+ * Copyright (C) 2013 Google Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "public/platform/WebCryptoAlgorithm.h"
+
+#include "public/platform/WebCryptoAlgorithmParams.h"
+#include "wtf/OwnPtr.h"
+#include "wtf/ThreadSafeRefCounted.h"
+
+namespace WebKit {
+
+class WebCryptoAlgorithmPrivate : public ThreadSafeRefCounted<WebCryptoAlgorithmPrivate> {
+public:
+    WebCryptoAlgorithmPrivate(WebCryptoAlgorithmId algorithmId, const char* algorithmName, PassOwnPtr<WebCryptoAlgorithmParams> params)
+        : algorithmId(algorithmId)
+        , algorithmName(algorithmName)
+        , params(params)
+    {
+    }
+
+    WebCryptoAlgorithmId algorithmId;
+    const char* const algorithmName;
+    OwnPtr<WebCryptoAlgorithmParams> params;
+};
+
+WebCryptoAlgorithm::WebCryptoAlgorithm(WebCryptoAlgorithmId algorithmId, const char* algorithmName, PassOwnPtr<WebCryptoAlgorithmParams> params)
+    : m_private(adoptRef(new WebCryptoAlgorithmPrivate(algorithmId, algorithmName, params)))
+{
+}
+
+WebCryptoAlgorithmId WebCryptoAlgorithm::algorithmId() const
+{
+    return m_private->algorithmId;
+}
+
+const char* WebCryptoAlgorithm::algorithmName() const
+{
+    return m_private->algorithmName;
+}
+
+WebCryptoAlgorithmParamsType WebCryptoAlgorithm::paramsType() const
+{
+    if (!m_private->params)
+        return WebCryptoAlgorithmParamsTypeNone;
+    return m_private->params->type();
+}
+
+WebCryptoAesCbcParams* WebCryptoAlgorithm::aesCbcParams() const
+{
+    if (paramsType() == WebCryptoAlgorithmParamsTypeAesCbcParams)
+        return static_cast<WebCryptoAesCbcParams*>(m_private->params.get());
+    return 0;
+}
+
+WebCryptoAesKeyGenParams* WebCryptoAlgorithm::aesKeyGenParams() const
+{
+    if (paramsType() == WebCryptoAlgorithmParamsTypeAesKeyGenParams)
+        return static_cast<WebCryptoAesKeyGenParams*>(m_private->params.get());
+    return 0;
+}
+
+void WebCryptoAlgorithm::assign(const WebCryptoAlgorithm& other)
+{
+    m_private = other.m_private;
+}
+
+void WebCryptoAlgorithm::reset()
+{
+    m_private.reset();
+}
+
+} // namespace WebKit