WebCrypto: Add parsing for the algorithm parameter AesDerivedKey.

Source/modules/crypto/NormalizeAlgorithm.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
@@ skipping 742 matching lines @@
     CryptoKey* cryptoKey = V8CryptoKey::toImplWithTypeCheck(raw.isolate(), v8Value);
     if (!cryptoKey) {
         setSyntaxError(context.toString("public", "Must be a CryptoKey"), error);
         return false;
     }
 
     params = adoptPtr(new WebCryptoEcdhKeyDeriveParams(cryptoKey->key()));
     return true;
 }
 
+// Defined by the WebCrypto spec as:
+//
+//    dictionary AesDerivedKeyParams : Algorithm {
+//      [EnforceRange] required unsigned short length;
+//    };
+bool parseAesDerivedKeyParams(const Dictionary& raw, OwnPtr<WebCryptoAlgorithmParams>& params, const ErrorContext& context, AlgorithmError* error)
+{
+    uint16_t length;
+    if (!getUint16(raw, "length", length, context, error))
+        return false;
+
+    params = adoptPtr(new WebCryptoAesDerivedKeyParams(length));
+    return true;
+}
+
 bool parseAlgorithmParams(const Dictionary& raw, WebCryptoAlgorithmParamsType type, OwnPtr<WebCryptoAlgorithmParams>& params, ErrorContext& context, AlgorithmError* error)
 {
     switch (type) {
     case WebCryptoAlgorithmParamsTypeNone:
         return true;
     case WebCryptoAlgorithmParamsTypeAesCbcParams:
         context.add("AesCbcParams");
         return parseAesCbcParams(raw, params, context, error);
     case WebCryptoAlgorithmParamsTypeAesKeyGenParams:
         context.add("AesKeyGenParams");
@@ skipping 27 matching lines @@
         return parseEcdsaParams(raw, params, context, error);
     case WebCryptoAlgorithmParamsTypeEcKeyGenParams:
         context.add("EcKeyGenParams");
         return parseEcKeyGenParams(raw, params, context, error);
     case WebCryptoAlgorithmParamsTypeEcKeyImportParams:
         context.add("EcKeyImportParams");
         return parseEcKeyImportParams(raw, params, context, error);
     case WebCryptoAlgorithmParamsTypeEcdhKeyDeriveParams:
         context.add("EcdhKeyDeriveParams");
         return parseEcdhKeyDeriveParams(raw, params, context, error);
+    case WebCryptoAlgorithmParamsTypeAesDerivedKeyParams:
+        context.add("AesDerivedKeyParams");
+        return parseAesDerivedKeyParams(raw, params, context, error);
     }
     ASSERT_NOT_REACHED();
     return false;
 }
 
 const char* operationToString(WebCryptoOperation op)
 {
     switch (op) {
     case WebCryptoOperationEncrypt:
         return "encrypt";
@@ skipping 77 matching lines @@
 }
 
 } // namespace
 
 bool normalizeAlgorithm(const AlgorithmIdentifier& raw, WebCryptoOperation op, WebCryptoAlgorithm& algorithm, AlgorithmError* error)
 {
     return parseAlgorithmIdentifier(raw, op, algorithm, ErrorContext(), error);
 }
 
 } // namespace blink