WebCrypto: Add interfaces for importKey().

Source/modules/crypto/NormalizeAlgorithm.cpp

Index: Source/modules/crypto/NormalizeAlgorithm.cpp
diff --git a/Source/modules/crypto/NormalizeAlgorithm.cpp b/Source/modules/crypto/NormalizeAlgorithm.cpp
index fa4c3e1bb76642a8867c88b95201507abfb5f6a3..aeeb9fc8f7f57dd83638a8d9f096d2e6d2700855 100644
--- a/Source/modules/crypto/NormalizeAlgorithm.cpp
+++ b/Source/modules/crypto/NormalizeAlgorithm.cpp
@@ -188,30 +188,39 @@ PassOwnPtr<WebKit::WebCryptoAlgorithmParams> parseAlgorithmParams(const Dictiona
     return nullptr;
 }
 
-} // namespace
-
-// FIXME: Throw the correct exception types!
-// This implementation corresponds with:
-// http://www.w3.org/TR/WebCryptoAPI/#algorithm-normalizing-rules
-bool normalizeAlgorithm(const Dictionary& raw, AlgorithmOperation op, WebKit::WebCryptoAlgorithm& algorithm, ExceptionCode& ec)
+const AlgorithmInfo* algorithmInfo(const Dictionary& raw, ExceptionCode& ec)
 {
     String algorithmName;
     if (!raw.get("name", algorithmName)) {
         ec = NotSupportedError;
-        return false;
+        return 0;
     }
 
     if (!algorithmName.containsOnlyASCII()) {
         ec = SyntaxError;
-        return false;
+        return 0;
     }
 
     const AlgorithmInfo* info = AlgorithmRegistry::lookupAlgorithmByName(algorithmName);
     if (!info) {
         ec = NotSupportedError;
-        return false;
+        return 0;
     }
 
+    return info;
+}
+
+} // namespace
+
+// FIXME: Throw the correct exception types!
+// This implementation corresponds with:
+// http://www.w3.org/TR/WebCryptoAPI/#algorithm-normalizing-rules
+bool normalizeAlgorithm(const Dictionary& raw, AlgorithmOperation op, WebKit::WebCryptoAlgorithm& algorithm, ExceptionCode& ec)
+{
+    const AlgorithmInfo* info = algorithmInfo(raw, ec);
+    if (!info)
+        return false;
+
     if (info->paramsForOperation[op] == UnsupportedOp) {
         ec = NotSupportedError;
         return false;
@@ -229,4 +238,14 @@ bool normalizeAlgorithm(const Dictionary& raw, AlgorithmOperation op, WebKit::We
     return true;
 }
 
+bool normalizeAlgorithmForImportKey(const Dictionary& raw, WebKit::WebCryptoAlgorithm& algorithm, ExceptionCode& ec)
+{
+    const AlgorithmInfo* info = algorithmInfo(raw, ec);
+    if (!info)
+        return false;
+
+    algorithm = WebKit::WebCryptoAlgorithm(info->algorithmId, info->algorithmName, nullptr);
+    return true;
+}
+
 } // namespace WebCore