[webcrypto] Add parameter parsing for RSA-PSS.

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 589 matching lines @@
     if (!getOptionalCryptoOperationData(raw, "label", hasLabel, label, context, error))
         return false;
 
     const unsigned char* labelStart = hasLabel ? static_cast<const unsigned char*>(label->baseAddress()) : 0;
     unsigned labelLength = hasLabel ? label->byteLength() : 0;
 
     params = adoptPtr(new WebCryptoRsaOaepParams(hasLabel, labelStart, labelLength));
     return true;
 }
 
+// Defined by the WebCrypto spec as:
+//
+//     dictionary RsaPssParams : Algorithm {
+//       [EnforceRange] required unsigned long saltLength;
+//     };
+bool parseRsaPssParams(const Dictionary& raw, OwnPtr<WebCryptoAlgorithmParams>& params, const ErrorContext& context, AlgorithmError* error)
+{
+    uint32_t saltLengthBytes;
+    if (!getUint32(raw, "saltLength", saltLengthBytes, context, error))
+        return false;
+
+    params = adoptPtr(new WebCryptoRsaPssParams(saltLengthBytes));
+    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 13 matching lines @@
     case WebCryptoAlgorithmParamsTypeAesCtrParams:
         context.add("AesCtrParams");
         return parseAesCtrParams(raw, params, context, error);
     case WebCryptoAlgorithmParamsTypeAesGcmParams:
         context.add("AesGcmParams");
         return parseAesGcmParams(raw, params, context, error);
     case WebCryptoAlgorithmParamsTypeRsaOaepParams:
         context.add("RsaOaepParams");
         return parseRsaOaepParams(raw, params, context, error);
         break;
+    case WebCryptoAlgorithmParamsTypeRsaPssParams:
+        context.add("RsaPssParams");
+        return parseRsaPssParams(raw, params, context, error);
+        break;
     }
     ASSERT_NOT_REACHED();
     return false;
 }
 
 const char* operationToString(WebCryptoOperation op)
 {
     switch (op) {
     case WebCryptoOperationEncrypt:
         return "encrypt";
@@ skipping 66 matching lines @@
 }
 
 } // namespace
 
 bool normalizeAlgorithm(const Dictionary& raw, WebCryptoOperation op, WebCryptoAlgorithm& algorithm, AlgorithmError* error)
 {
     return parseAlgorithm(raw, op, algorithm, ErrorContext(), error);
 }
 
 } // namespace blink