Implement HKDF for WebCrypto (blink-side)

Source/platform/exported/WebCryptoAlgorithm.cpp

Index: Source/platform/exported/WebCryptoAlgorithm.cpp
diff --git a/Source/platform/exported/WebCryptoAlgorithm.cpp b/Source/platform/exported/WebCryptoAlgorithm.cpp
index 35b1e0ac28a58c6093b3ce662be919c17a547d50..38333ff9d174de258bdc69c7d9782f13a2923b90 100644
--- a/Source/platform/exported/WebCryptoAlgorithm.cpp
+++ b/Source/platform/exported/WebCryptoAlgorithm.cpp
@@ -239,6 +239,20 @@ const WebCryptoAlgorithmInfo algorithmIdToInfo[] = {
             WebCryptoAlgorithmParamsTypeNone, // WrapKey
             WebCryptoAlgorithmParamsTypeNone // UnwrapKey
         }
+    }, { // Index 14
+        "HKDF", {
+            WebCryptoAlgorithmInfo::Undefined, // Encrypt
+            WebCryptoAlgorithmInfo::Undefined, // Decrypt
+            WebCryptoAlgorithmInfo::Undefined, // Sign
+            WebCryptoAlgorithmInfo::Undefined, // Verify
+            WebCryptoAlgorithmInfo::Undefined, // Digest
+            WebCryptoAlgorithmInfo::Undefined, // GenerateKey
+            WebCryptoAlgorithmParamsTypeNone, // ImportKey
+            WebCryptoAlgorithmParamsTypeNone, // GetKeyLength
+            WebCryptoAlgorithmParamsTypeHkdfParams, // DeriveBits
+            WebCryptoAlgorithmInfo::Undefined, // WrapKey
+            WebCryptoAlgorithmInfo::Undefined // UnwrapKey
+        }
     },
 };
 
@@ -259,7 +273,8 @@ static_assert(WebCryptoAlgorithmIdAesKw == 10, "AESKW id must match");
 static_assert(WebCryptoAlgorithmIdRsaPss == 11, "RSA-PSS id must match");
 static_assert(WebCryptoAlgorithmIdEcdsa == 12, "ECDSA id must match");
 static_assert(WebCryptoAlgorithmIdEcdh == 13, "ECDH id must match");
-static_assert(WebCryptoAlgorithmIdLast == 13, "last id must match");
+static_assert(WebCryptoAlgorithmIdHkdf == 14, "HKDF id must match");
+static_assert(WebCryptoAlgorithmIdLast == 14, "last id must match");
 static_assert(10 == WebCryptoOperationLast, "the parameter mapping needs to be updated");
 
 } // namespace
@@ -437,6 +452,14 @@ const WebCryptoAesDerivedKeyParams* WebCryptoAlgorithm::aesDerivedKeyParams() co
     return 0;
 }
 
+const WebCryptoHkdfParams* WebCryptoAlgorithm::hkdfParams() const
+{
+    ASSERT(!isNull());
+    if (paramsType() == WebCryptoAlgorithmParamsTypeHkdfParams)
+        return static_cast<WebCryptoHkdfParams*>(m_private->params.get());
+    return 0;
+}
+
 bool WebCryptoAlgorithm::isHash(WebCryptoAlgorithmId id)
 {
     switch (id) {
@@ -455,6 +478,7 @@ bool WebCryptoAlgorithm::isHash(WebCryptoAlgorithmId id)
     case WebCryptoAlgorithmIdRsaPss:
     case WebCryptoAlgorithmIdEcdsa:
     case WebCryptoAlgorithmIdEcdh:
+    case WebCryptoAlgorithmIdHkdf:
         break;
     }
     return false;