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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/renderer/extensions/platform_keys_natives.h"
#include <string>
#include "base/values.h"
#include "content/public/child/v8_value_converter.h"
#include "extensions/renderer/script_context.h"
#include "third_party/WebKit/public/platform/WebCryptoAlgorithm.h"
#include "third_party/WebKit/public/platform/WebCryptoAlgorithmParams.h"
#include "third_party/WebKit/public/platform/WebString.h"
#include "third_party/WebKit/public/platform/WebVector.h"
#include "third_party/WebKit/public/web/WebCryptoNormalize.h"
namespace extensions {
namespace {
bool StringToWebCryptoOperation(const std::string& str,
blink::WebCryptoOperation* op) {
if (str == "GenerateKey") {
*op = blink::WebCryptoOperationGenerateKey;
return true;
}
if (str == "ImportKey") {
*op = blink::WebCryptoOperationImportKey;
return true;
}
if (str == "Sign") {
*op = blink::WebCryptoOperationSign;
return true;
}
if (str == "Verify") {
*op = blink::WebCryptoOperationVerify;
return true;
}
return false;
}
scoped_ptr<base::DictionaryValue> WebCryptoAlgorithmToBaseValue(
const blink::WebCryptoAlgorithm& algorithm) {
DCHECK(!algorithm.isNull());
scoped_ptr<base::DictionaryValue> dict(new base::DictionaryValue);
const blink::WebCryptoAlgorithmInfo* info =
blink::WebCryptoAlgorithm::lookupAlgorithmInfo(algorithm.id());
dict->SetStringWithoutPathExpansion("name", info->name);
const blink::WebCryptoAlgorithm* hash = nullptr;
const blink::WebCryptoRsaHashedKeyGenParams* rsaHashedKeyGen =
algorithm.rsaHashedKeyGenParams();
if (rsaHashedKeyGen) {
dict->SetIntegerWithoutPathExpansion("modulusLength",
rsaHashedKeyGen->modulusLengthBits());
const blink::WebVector<unsigned char>& public_exponent =
rsaHashedKeyGen->publicExponent();
dict->SetWithoutPathExpansion(
"publicExponent",
base::BinaryValue::CreateWithCopiedBuffer(
reinterpret_cast<const char*>(public_exponent.data()),
public_exponent.size()));
hash = &rsaHashedKeyGen->hash();
DCHECK(!hash->isNull());
}
const blink::WebCryptoRsaHashedImportParams* rsaHashedImport =
algorithm.rsaHashedImportParams();
if (rsaHashedImport) {
hash = &rsaHashedImport->hash();
DCHECK(!hash->isNull());
}
if (hash) {
const blink::WebCryptoAlgorithmInfo* hash_info =
blink::WebCryptoAlgorithm::lookupAlgorithmInfo(hash->id());
scoped_ptr<base::DictionaryValue> hash_dict(new base::DictionaryValue);
hash_dict->SetStringWithoutPathExpansion("name", hash_info->name);
dict->SetWithoutPathExpansion("hash", hash_dict.release());
}
// Otherwise, |algorithm| is missing support here or no parameters were
// required.
return dict.Pass();
}
} // namespace
PlatformKeysNatives::PlatformKeysNatives(ScriptContext* context)
: ObjectBackedNativeHandler(context) {
RouteFunction("NormalizeAlgorithm",
base::Bind(&PlatformKeysNatives::NormalizeAlgorithm,
base::Unretained(this)));
}
void PlatformKeysNatives::NormalizeAlgorithm(
const v8::FunctionCallbackInfo<v8::Value>& call_info) {
DCHECK_EQ(call_info.Length(), 2);
DCHECK(call_info[0]->IsObject());
DCHECK(call_info[1]->IsString());
blink::WebCryptoOperation operation;
if (!StringToWebCryptoOperation(*v8::String::Utf8Value(call_info[1]),
&operation)) {
return;
}
blink::WebString error_details;
int exception_code = 0;
blink::WebCryptoAlgorithm algorithm = blink::normalizeCryptoAlgorithm(
v8::Local<v8::Object>::Cast(call_info[0]), operation, &exception_code,
&error_details, call_info.GetIsolate());
scoped_ptr<base::DictionaryValue> algorithm_dict;
if (!algorithm.isNull())
algorithm_dict = WebCryptoAlgorithmToBaseValue(algorithm);
if (!algorithm_dict)
return;
scoped_ptr<content::V8ValueConverter> converter(
content::V8ValueConverter::create());
call_info.GetReturnValue().Set(
converter->ToV8Value(algorithm_dict.get(), context()->v8_context()));
}
} // namespace extensions
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