#include "crypto/crypto_timing.h"

#include "crypto/crypto_util.h"

#include "env-inl.h"

#include "node.h"

#include "node_debug.h"

#include "node_errors.h"

#include "v8.h"

#include <openssl/crypto.h>

namespace node {

using v8::CFunction;

using v8::FastApiCallbackOptions;

using v8::FunctionCallbackInfo;

using v8::HandleScope;

using v8::Local;

using v8::Object;

using v8::Value;

namespace crypto {

namespace Timing {

void TimingSafeEqual(const FunctionCallbackInfo<Value>& args) {

// Moving the type checking into JS leads to test failures, most likely due

// to V8 inlining certain parts of the wrapper. Therefore, keep them in C++.

// Refs: https://github.com/nodejs/node/issues/34073.

Environment* env = Environment::GetCurrent(args);

if (!IsAnyBufferSource(args[0])) {

THROW_ERR_INVALID_ARG_TYPE(

env, "The \"buf1\" argument must be an instance of "

"ArrayBuffer, Buffer, TypedArray, or DataView.");

return;

}

if (!IsAnyBufferSource(args[1])) {

THROW_ERR_INVALID_ARG_TYPE(

env, "The \"buf2\" argument must be an instance of "

"ArrayBuffer, Buffer, TypedArray, or DataView.");

return;

}

ArrayBufferOrViewContents<char> buf1(args[0]);

ArrayBufferOrViewContents<char> buf2(args[1]);

if (buf1.size() != buf2.size()) {

THROW_ERR_CRYPTO_TIMING_SAFE_EQUAL_LENGTH(env);

return;

}

return args.GetReturnValue().Set(

CRYPTO_memcmp(buf1.data(), buf2.data(), buf1.size()) == 0);

}

bool FastTimingSafeEqual(Local<Value> receiver,

Local<Value> a_obj,

Local<Value> b_obj,

// NOLINTNEXTLINE(runtime/references)

FastApiCallbackOptions& options) {

HandleScope scope(options.isolate);

ArrayBufferViewContents<uint8_t> a(a_obj);

ArrayBufferViewContents<uint8_t> b(b_obj);

if (a.length() != b.length()) {

TRACK_V8_FAST_API_CALL("crypto.timingSafeEqual.error");

THROW_ERR_CRYPTO_TIMING_SAFE_EQUAL_LENGTH(options.isolate);

return false;

}

TRACK_V8_FAST_API_CALL("crypto.timingSafeEqual.ok");

return CRYPTO_memcmp(a.data(), b.data(), a.length()) == 0;

}

static CFunction fast_timing_safe_equal(CFunction::Make(FastTimingSafeEqual));

void Initialize(Environment* env, Local<Object> target) {

SetFastMethodNoSideEffect(env->context(),

target,

"timingSafeEqual",

TimingSafeEqual,

&fast_timing_safe_equal);

}

void RegisterExternalReferences(ExternalReferenceRegistry* registry) {

registry->Register(TimingSafeEqual);

registry->Register(fast_timing_safe_equal);

}

} // namespace Timing

} // namespace crypto

} // namespace node