Expose WebCrypto's algorithm normalization.

Source/modules/crypto/SubtleCrypto.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 20 matching lines @@
 #include "config.h"
 #include "modules/crypto/SubtleCrypto.h"
 
 #include "bindings/v8/Dictionary.h"
 #include "modules/crypto/CryptoResultImpl.h"
 #include "modules/crypto/Key.h"
 #include "modules/crypto/NormalizeAlgorithm.h"
 #include "public/platform/Platform.h"
 #include "public/platform/WebCrypto.h"
 #include "public/platform/WebCryptoAlgorithm.h"
+#include "public/platform/WebCryptoAlgorithmOperation.h"
 #include "wtf/ArrayBufferView.h"
 
 namespace WebCore {
 
 namespace {
 
 // Seems like the generated bindings should take care of these however it
 // currently doesn't. See also http://crbug.com/264520
 bool ensureNotNull(const ArrayPiece& x, const char* paramName, CryptoResult* result)
 {
     if (x.isNull()) {
         String message = String("Invalid ") + paramName + String(" argument");
         result->completeWithError(blink::WebCryptoErrorTypeType, blink::WebString(message));
         return false;
     }
     return true;
 }
 
 bool ensureNotNull(Key* key, const char* paramName, CryptoResult* result)
 {
     if (!key) {
         String message = String("Invalid ") + paramName + String(" argument");
         result->completeWithError(blink::WebCryptoErrorTypeType, blink::WebString(message));
         return false;
     }
     return true;
 }
 
-ScriptPromise startCryptoOperation(const Dictionary& rawAlgorithm, Key* key, AlgorithmOperation operationType, const ArrayPiece& signature, const ArrayPiece& dataBuffer)
+bool parseAlgorithm(const Dictionary& raw, blink::AlgorithmOperation op, blink::WebCryptoAlgorithm& algorithm, CryptoResult* result)
+{
+    AlgorithmError error;
+    bool success = normalizeAlgorithm(raw, op, algorithm, &error);
+    if (!success)
+        result->completeWithError(error.errorType, error.errorDetails);
+    return success;
+}
+
+ScriptPromise startCryptoOperation(const Dictionary& rawAlgorithm, Key* key, blink::AlgorithmOperation operationType, const ArrayPiece& signature, const ArrayPiece& dataBuffer)
 {
     RefPtr<CryptoResultImpl> result = CryptoResultImpl::create();
     ScriptPromise promise = result->promise();
 
-    bool requiresKey = operationType != Digest;
+    bool requiresKey = operationType != blink::Digest;
 
     if (requiresKey && !ensureNotNull(key, "key", result.get()))
         return promise;
-    if (operationType == Verify && !ensureNotNull(signature, "signature", result.get()))
+    if (operationType == blink::Verify && !ensureNotNull(signature, "signature", result.get()))
         return promise;
     if (!ensureNotNull(dataBuffer, "dataBuffer", result.get()))
         return promise;
 
     blink::WebCryptoAlgorithm algorithm;
     if (!parseAlgorithm(rawAlgorithm, operationType, algorithm, result.get()))
         return promise;
 
     if (requiresKey && !key->canBeUsedForAlgorithm(algorithm, operationType, result.get()))
         return promise;
 
     const unsigned char* data = dataBuffer.bytes();
     unsigned dataSize = dataBuffer.byteLength();
 
     switch (operationType) {
-    case Encrypt:
+    case blink::Encrypt:
         blink::Platform::current()->crypto()->encrypt(algorithm, key->key(), data, dataSize, result->result());
         break;
-    case Decrypt:
+    case blink::Decrypt:
         blink::Platform::current()->crypto()->decrypt(algorithm, key->key(), data, dataSize, result->result());
         break;
-    case Sign:
+    case blink::Sign:
         blink::Platform::current()->crypto()->sign(algorithm, key->key(), data, dataSize, result->result());
         break;
-    case Verify:
+    case blink::Verify:
         blink::Platform::current()->crypto()->verifySignature(algorithm, key->key(), signature.bytes(), signature.byteLength(), data, dataSize, result->result());
         break;
-    case Digest:
+    case blink::Digest:
         blink::Platform::current()->crypto()->digest(algorithm, data, dataSize, result->result());
         break;
     default:
         ASSERT_NOT_REACHED();
         return ScriptPromise();
     }
 
     return promise;
 }
 
 } // namespace
 
 SubtleCrypto::SubtleCrypto()
 {
     ScriptWrappable::init(this);
 }
 
 ScriptPromise SubtleCrypto::encrypt(const Dictionary& rawAlgorithm, Key* key, const ArrayPiece& data)
 {
-    return startCryptoOperation(rawAlgorithm, key, Encrypt, ArrayPiece(), data);
+    return startCryptoOperation(rawAlgorithm, key, blink::Encrypt, ArrayPiece(), data);
 }
 
 ScriptPromise SubtleCrypto::decrypt(const Dictionary& rawAlgorithm, Key* key, const ArrayPiece& data)
 {
-    return startCryptoOperation(rawAlgorithm, key, Decrypt, ArrayPiece(), data);
+    return startCryptoOperation(rawAlgorithm, key, blink::Decrypt, ArrayPiece(), data);
 }
 
 ScriptPromise SubtleCrypto::sign(const Dictionary& rawAlgorithm, Key* key, const ArrayPiece& data)
 {
-    return startCryptoOperation(rawAlgorithm, key, Sign, ArrayPiece(), data);
+    return startCryptoOperation(rawAlgorithm, key, blink::Sign, ArrayPiece(), data);
 }
 
 ScriptPromise SubtleCrypto::verifySignature(const Dictionary& rawAlgorithm, Key* key, const ArrayPiece& signature, const ArrayPiece& data)
 {
-    return startCryptoOperation(rawAlgorithm, key, Verify, signature, data);
+    return startCryptoOperation(rawAlgorithm, key, blink::Verify, signature, data);
 }
 
 ScriptPromise SubtleCrypto::digest(const Dictionary& rawAlgorithm, const ArrayPiece& data)
 {
-    return startCryptoOperation(rawAlgorithm, 0, Digest, ArrayPiece(), data);
+    return startCryptoOperation(rawAlgorithm, 0, blink::Digest, ArrayPiece(), data);
 }
 
 ScriptPromise SubtleCrypto::generateKey(const Dictionary& rawAlgorithm, bool extractable, const Vector<String>& rawKeyUsages)
 {
     RefPtr<CryptoResultImpl> result = CryptoResultImpl::create();
     ScriptPromise promise = result->promise();
 
     blink::WebCryptoKeyUsageMask keyUsages;
     if (!Key::parseUsageMask(rawKeyUsages, keyUsages, result.get()))
         return promise;
 
     blink::WebCryptoAlgorithm algorithm;
-    if (!parseAlgorithm(rawAlgorithm, GenerateKey, algorithm, result.get()))
+    if (!parseAlgorithm(rawAlgorithm, blink::GenerateKey, algorithm, result.get()))
         return promise;
 
     blink::Platform::current()->crypto()->generateKey(algorithm, extractable, keyUsages, result->result());
     return promise;
 }
 
 ScriptPromise SubtleCrypto::importKey(const String& rawFormat, const ArrayPiece& keyData, const Dictionary& rawAlgorithm, bool extractable, const Vector<String>& rawKeyUsages)
 {
     RefPtr<CryptoResultImpl> result = CryptoResultImpl::create();
     ScriptPromise promise = result->promise();
 
     if (!ensureNotNull(keyData, "keyData", result.get()))
         return promise;
 
     blink::WebCryptoKeyFormat format;
     if (!Key::parseFormat(rawFormat, format, result.get()))
         return promise;
 
     blink::WebCryptoKeyUsageMask keyUsages;
     if (!Key::parseUsageMask(rawKeyUsages, keyUsages, result.get()))
         return promise;
 
     blink::WebCryptoAlgorithm algorithm;
-    if (!parseAlgorithm(rawAlgorithm, ImportKey, algorithm, result.get()))
+    if (!parseAlgorithm(rawAlgorithm, blink::ImportKey, algorithm, result.get()))
         return promise;
 
     blink::Platform::current()->crypto()->importKey(format, keyData.bytes(), keyData.byteLength(), algorithm, extractable, keyUsages, result->result());
     return promise;
 }
 
 ScriptPromise SubtleCrypto::exportKey(const String& rawFormat, Key* key)
 {
     RefPtr<CryptoResultImpl> result = CryptoResultImpl::create();
     ScriptPromise promise = result->promise();
@@ skipping 23 matching lines @@
         return promise;
 
     if (!ensureNotNull(wrappingKey, "wrappingKey", result.get()))
         return promise;
 
     blink::WebCryptoKeyFormat format;
     if (!Key::parseFormat(rawFormat, format, result.get()))
         return promise;
 
     blink::WebCryptoAlgorithm wrapAlgorithm;
-    if (!parseAlgorithm(rawWrapAlgorithm, WrapKey, wrapAlgorithm, result.get()))
+    if (!parseAlgorithm(rawWrapAlgorithm, blink::WrapKey, wrapAlgorithm, result.get()))
         return promise;
 
     if (!key->extractable()) {
         result->completeWithError(blink::WebCryptoErrorTypeInvalidAccess, "key is not extractable");
         return promise;
     }
 
-    if (!wrappingKey->canBeUsedForAlgorithm(wrapAlgorithm, WrapKey, result.get()))
+    if (!wrappingKey->canBeUsedForAlgorithm(wrapAlgorithm, blink::WrapKey, result.get()))
         return promise;
 
     blink::Platform::current()->crypto()->wrapKey(format, key->key(), wrappingKey->key(), wrapAlgorithm, result->result());
     return promise;
 }
 
 ScriptPromise SubtleCrypto::unwrapKey(const String& rawFormat, const ArrayPiece& wrappedKey, Key* unwrappingKey, const Dictionary& rawUnwrapAlgorithm, const Dictionary& rawUnwrappedKeyAlgorithm, bool extractable, const Vector<String>& rawKeyUsages)
 {
     RefPtr<CryptoResultImpl> result = CryptoResultImpl::create();
     ScriptPromise promise = result->promise();
 
     if (!ensureNotNull(wrappedKey, "wrappedKey", result.get()))
         return promise;
     if (!ensureNotNull(unwrappingKey, "unwrappingKey", result.get()))
         return promise;
 
     blink::WebCryptoKeyFormat format;
     if (!Key::parseFormat(rawFormat, format, result.get()))
         return promise;
 
     blink::WebCryptoKeyUsageMask keyUsages;
     if (!Key::parseUsageMask(rawKeyUsages, keyUsages, result.get()))
         return promise;
 
     blink::WebCryptoAlgorithm unwrapAlgorithm;
-    if (!parseAlgorithm(rawUnwrapAlgorithm, UnwrapKey, unwrapAlgorithm, result.get()))
+    if (!parseAlgorithm(rawUnwrapAlgorithm, blink::UnwrapKey, unwrapAlgorithm, result.get()))
         return promise;
 
     blink::WebCryptoAlgorithm unwrappedKeyAlgorithm;
-    if (!parseAlgorithm(rawUnwrappedKeyAlgorithm, ImportKey, unwrappedKeyAlgorithm, result.get()))
+    if (!parseAlgorithm(rawUnwrappedKeyAlgorithm, blink::ImportKey, unwrappedKeyAlgorithm, result.get()))
         return promise;
 
-    if (!unwrappingKey->canBeUsedForAlgorithm(unwrapAlgorithm, UnwrapKey, result.get()))
+    if (!unwrappingKey->canBeUsedForAlgorithm(unwrapAlgorithm, blink::UnwrapKey, result.get()))
         return promise;
 
     blink::Platform::current()->crypto()->unwrapKey(format, wrappedKey.bytes(), wrappedKey.byteLength(), unwrappingKey->key(), unwrapAlgorithm, unwrappedKeyAlgorithm, extractable, keyUsages, result->result());
     return promise;
 }
 
 } // namespace WebCore