[webcrypto] Add the KeyAlgorithm interface.

Source/modules/crypto/KeyAlgorithm.cpp

Index: Source/modules/crypto/KeyAlgorithm.cpp
diff --git a/Source/modules/crypto/Algorithm.cpp b/Source/modules/crypto/KeyAlgorithm.cpp
similarity index 53%
copy from Source/modules/crypto/Algorithm.cpp
copy to Source/modules/crypto/KeyAlgorithm.cpp
index f3cc089a18e78eb9944fc5dcb88a638aa1a811c3..64ca0654bcd01fd6aa2077f075d2b3cbd10993ff 100644
--- a/Source/modules/crypto/Algorithm.cpp
+++ b/Source/modules/crypto/KeyAlgorithm.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2013 Google Inc. All rights reserved.
+ * Copyright (C) 2014 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
@@ -29,29 +29,56 @@
  */
 
 #include "config.h"
-#include "modules/crypto/Algorithm.h"
+#include "modules/crypto/KeyAlgorithm.h"
 
+#include "modules/crypto/AesKeyAlgorithm.h"
+#include "modules/crypto/HmacKeyAlgorithm.h"
 #include "modules/crypto/NormalizeAlgorithm.h"
+#include "modules/crypto/RsaHashedKeyAlgorithm.h"
+#include "modules/crypto/RsaKeyAlgorithm.h"
 #include "wtf/text/WTFString.h"
 
 namespace WebCore {
 
-DEFINE_GC_INFO(Algorithm);
+DEFINE_GC_INFO(KeyAlgorithm);
 
-PassRefPtrWillBeRawPtr<Algorithm> Algorithm::create(const blink::WebCryptoAlgorithm& algorithm)
+PassRefPtrWillBeRawPtr<KeyAlgorithm> KeyAlgorithm::create(const blink::WebCryptoKeyAlgorithm& algorithm)
 {
-    return adoptRefWillBeNoop(new Algorithm(algorithm));
+    switch (algorithm.paramsType()) {
+    case blink::WebCryptoKeyAlgorithmParamsTypeNone:
+        return adoptRefWillBeNoop(new KeyAlgorithm(algorithm));
+    case blink::WebCryptoKeyAlgorithmParamsTypeAes:
+        return AesKeyAlgorithm::create(algorithm);
+    case blink::WebCryptoKeyAlgorithmParamsTypeHmac:
+        return HmacKeyAlgorithm::create(algorithm);
+    case blink::WebCryptoKeyAlgorithmParamsTypeRsa:
+        return RsaKeyAlgorithm::create(algorithm);
+    case blink::WebCryptoKeyAlgorithmParamsTypeRsaHashed:
+        return RsaHashedKeyAlgorithm::create(algorithm);
+    }
 }
 
-Algorithm::Algorithm(const blink::WebCryptoAlgorithm& algorithm)
+PassRefPtrWillBeRawPtr<KeyAlgorithm> KeyAlgorithm::createHash(const blink::WebCryptoAlgorithm& hash)
+{
+    // Assume that none of the hash algorithms have any parameters.
+    ASSERT(hash.paramsType() == blink::WebCryptoAlgorithmParamsTypeNone);
+    return adoptRefWillBeNoop(new KeyAlgorithm(blink::WebCryptoKeyAlgorithm(hash.id(), nullptr)));
+}
+
+KeyAlgorithm::KeyAlgorithm(const blink::WebCryptoKeyAlgorithm& algorithm)
     : m_algorithm(algorithm)
 {
     ScriptWrappable::init(this);
 }
 
-String Algorithm::name()
+String KeyAlgorithm::name()
 {
     return algorithmIdToName(m_algorithm.id());
 }
 
+blink::WebCryptoKeyAlgorithmParamsType KeyAlgorithm::type() const
+{
+    return m_algorithm.paramsType();
+}
+
 } // namespace WebCore