Implement HKDF for WebCrypto (blink-side)

Source/bindings/modules/v8/ScriptValueSerializerForModules.cpp

Index: Source/bindings/modules/v8/ScriptValueSerializerForModules.cpp
diff --git a/Source/bindings/modules/v8/ScriptValueSerializerForModules.cpp b/Source/bindings/modules/v8/ScriptValueSerializerForModules.cpp
index 08add9b64a162f1c2349c1a1f0b7f4b41428265f..f5cfc43a0ea8bf4cc0e0eef6080376092faf2d28 100644
--- a/Source/bindings/modules/v8/ScriptValueSerializerForModules.cpp
+++ b/Source/bindings/modules/v8/ScriptValueSerializerForModules.cpp
@@ -30,6 +30,7 @@ enum CryptoKeyAlgorithmTag {
     RsaPssTag = 13,
     EcdsaTag = 14,
     EcdhTag = 15,
+    HkdfTag = 16,
     // Maximum allowed value is 2^32-1
 };
 
@@ -61,6 +62,7 @@ enum CryptoKeySubTag {
     // ID 3 was used by RsaKeyTag, while still behind experimental flag.
     RsaHashedKeyTag = 4,
     EcKeyTag = 5,
+    KdfKeyTag = 6,
     // Maximum allowed value is 255
 };
 
@@ -121,6 +123,9 @@ bool SerializedScriptValueWriterForModules::writeCryptoKey(const WebCryptoKey& k
     case WebCryptoKeyAlgorithmParamsTypeEc:
         doWriteEcKey(key);
         break;
+    case WebCryptoKeyAlgorithmParamsTypeKdf:
+        doWriteKdfKey(key);
+        break;
     case WebCryptoKeyAlgorithmParamsTypeNone:
         ASSERT_NOT_REACHED();
         return false;
@@ -184,6 +189,14 @@ void SerializedScriptValueWriterForModules::doWriteEcKey(const WebCryptoKey& key
     doWriteNamedCurve(key.algorithm().ecParams()->namedCurve());
 }
 
+void SerializedScriptValueWriterForModules::doWriteKdfKey(const WebCryptoKey& key)
+{
+    ASSERT(key.algorithm().kdfParams());
+    append(static_cast<uint8_t>(KdfKeyTag));
+
+    doWriteAlgorithmId(key.algorithm().id());
+}
+
 void SerializedScriptValueWriterForModules::doWriteAlgorithmId(WebCryptoAlgorithmId id)
 {
     switch (id) {
@@ -215,6 +228,8 @@ void SerializedScriptValueWriterForModules::doWriteAlgorithmId(WebCryptoAlgorith
         return doWriteUint32(EcdsaTag);
     case WebCryptoAlgorithmIdEcdh:
         return doWriteUint32(EcdhTag);
+    case WebCryptoAlgorithmIdHkdf:
+        return doWriteUint32(HkdfTag);
     }
     ASSERT_NOT_REACHED();
 }
@@ -359,6 +374,10 @@ bool SerializedScriptValueReaderForModules::readCryptoKey(v8::Handle<v8::Value>*
         if (!doReadEcKey(algorithm, type))
             return false;
         break;
+    case KdfKeyTag:
+        if (!doReadKdfKey(algorithm, type))
+            return false;
+        break;
     default:
         return false;
     }
@@ -458,6 +477,16 @@ bool SerializedScriptValueReaderForModules::doReadEcKey(WebCryptoKeyAlgorithm& a
     return !algorithm.isNull();
 }
 
+bool SerializedScriptValueReaderForModules::doReadKdfKey(WebCryptoKeyAlgorithm& algorithm, WebCryptoKeyType& type)
+{
+    WebCryptoAlgorithmId kdf;
+    if (!doReadAlgorithmId(kdf))
+        return false;
+    algorithm = WebCryptoKeyAlgorithm::createKdf(kdf);
+    type = WebCryptoKeyTypeSecret;
+    return !algorithm.isNull();
+}
+
 bool SerializedScriptValueReaderForModules::doReadAlgorithmId(WebCryptoAlgorithmId& id)
 {
     uint32_t rawId;
@@ -507,6 +536,9 @@ bool SerializedScriptValueReaderForModules::doReadAlgorithmId(WebCryptoAlgorithm
     case EcdhTag:
         id = WebCryptoAlgorithmIdEcdh;
         return true;
+    case HkdfTag:
+        id = WebCryptoAlgorithmIdHkdf;
+        return true;
     }
 
     return false;