[webcrypto] Implement PBKDF2 (blink-side)

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 53 matching lines @@
 };
 
 // Must be sorted by length, and then by reverse string.
 // Also all names must be upper case ASCII.
 const AlgorithmNameMapping algorithmNameMappings[] = {
     {"HMAC", 4, WebCryptoAlgorithmIdHmac},
     {"HKDF", 4, WebCryptoAlgorithmIdHkdf},
     {"ECDH", 4, WebCryptoAlgorithmIdEcdh},
     {"SHA-1", 5, WebCryptoAlgorithmIdSha1},
     {"ECDSA", 5, WebCryptoAlgorithmIdEcdsa},
+    {"PBKDF2", 6, WebCryptoAlgorithmIdPbkdf2},
     {"AES-KW", 6, WebCryptoAlgorithmIdAesKw},
     {"SHA-512", 7, WebCryptoAlgorithmIdSha512},
     {"SHA-384", 7, WebCryptoAlgorithmIdSha384},
     {"SHA-256", 7, WebCryptoAlgorithmIdSha256},
     {"AES-CBC", 7, WebCryptoAlgorithmIdAesCbc},
     {"AES-GCM", 7, WebCryptoAlgorithmIdAesGcm},
     {"AES-CTR", 7, WebCryptoAlgorithmIdAesCtr},
     {"RSA-PSS", 7, WebCryptoAlgorithmIdRsaPss},
     {"RSA-OAEP", 8, WebCryptoAlgorithmIdRsaOaep},
     {"RSASSA-PKCS1-V1_5", 17, WebCryptoAlgorithmIdRsaSsaPkcs1v1_5},
@@ skipping 670 matching lines @@
         setTypeError(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 Pbkdf2Params : Algorithm {
+//       required BufferSource salt;
+//       [EnforceRange] required unsigned long iterations;
+//       required HashAlgorithmIdentifier hash;
+//     };
+bool parsePbkdf2Params(const Dictionary& raw, OwnPtr<WebCryptoAlgorithmParams>& params, const ErrorContext& context, AlgorithmError* error)
+{
+    BufferSource saltBufferSource;
+    if (!getBufferSource(raw, "salt", saltBufferSource, context, error))
+        return false;
+
+    DOMArrayPiece salt(saltBufferSource);
+
+    uint32_t iterations;
+    if (!getUint32(raw, "iterations", iterations, context, error))
+        return false;
+
+    WebCryptoAlgorithm hash;
+    if (!parseHash(raw, hash, context, error))
+        return false;
+    params = adoptPtr(new WebCryptoPbkdf2Params(hash, salt.bytes(), salt.byteLength(), iterations));
+    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));
@@ skipping 77 matching lines @@
         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);
     case WebCryptoAlgorithmParamsTypeHkdfParams:
         context.add("HkdfParams");
         return parseHkdfParams(raw, params, context, error);
+    case WebCryptoAlgorithmParamsTypePbkdf2Params:
+        context.add("Pbkdf2Params");
+        return parsePbkdf2Params(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