webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

1 files changed, 101 insertions, 0 deletions

diff --git a/Source/WebCore/crypto/CryptoAlgorithmRegistry.cpp b/Source/WebCore/crypto/CryptoAlgorithmRegistry.cpp
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+++ b/Source/WebCore/crypto/CryptoAlgorithmRegistry.cpp
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+/*
+ * Copyright (C) 2013 Apple 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:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS 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 "CryptoAlgorithmRegistry.h"
+
+#if ENABLE(SUBTLE_CRYPTO)
+
+#include "CryptoAlgorithm.h"
+#include <wtf/Lock.h>
+#include <wtf/NeverDestroyed.h>
+
+namespace WebCore {
+
+static StaticLock registryMutex;
+
+CryptoAlgorithmRegistry& CryptoAlgorithmRegistry::singleton()
+{
+    static NeverDestroyed<CryptoAlgorithmRegistry> registry;
+    return registry;
+}
+
+CryptoAlgorithmRegistry::CryptoAlgorithmRegistry()
+{
+    platformRegisterAlgorithms();
+}
+
+std::optional<CryptoAlgorithmIdentifier> CryptoAlgorithmRegistry::identifier(const String& name)
+{
+    if (name.isEmpty())
+        return std::nullopt;
+
+    std::lock_guard<StaticLock> lock(registryMutex);
+
+    // FIXME: How is it helpful to call isolatedCopy on the argument to find?
+    auto identifier = m_identifiers.find(name.isolatedCopy());
+    if (identifier == m_identifiers.end())
+        return std::nullopt;
+
+    return identifier->value;
+}
+
+String CryptoAlgorithmRegistry::name(CryptoAlgorithmIdentifier identifier)
+{
+    std::lock_guard<StaticLock> lock(registryMutex);
+
+    auto contructor = m_constructors.find(static_cast<unsigned>(identifier));
+    if (contructor == m_constructors.end())
+        return { };
+
+    return contructor->value.first.isolatedCopy();
+}
+
+RefPtr<CryptoAlgorithm> CryptoAlgorithmRegistry::create(CryptoAlgorithmIdentifier identifier)
+{
+    std::lock_guard<StaticLock> lock(registryMutex);
+
+    auto contructor = m_constructors.find(static_cast<unsigned>(identifier));
+    if (contructor == m_constructors.end())
+        return nullptr;
+
+    return contructor->value.second();
+}
+
+void CryptoAlgorithmRegistry::registerAlgorithm(const String& name, CryptoAlgorithmIdentifier identifier, CryptoAlgorithmConstructor constructor)
+{
+    std::lock_guard<StaticLock> lock(registryMutex);
+
+    ASSERT(!m_identifiers.contains(name));
+    ASSERT(!m_constructors.contains(static_cast<unsigned>(identifier)));
+
+    m_identifiers.add(name, identifier);
+    m_constructors.add(static_cast<unsigned>(identifier), std::make_pair(name, constructor));
+}
+
+
+} // namespace WebCore
+
+#endif // ENABLE(SUBTLE_CRYPTO)