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/*
* Copyright (C) 2013 Apple 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:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "CryptoAlgorithmRSA_OAEP.h"
#include "CryptoAlgorithmRsaHashedImportParams.h"
#include "CryptoAlgorithmRsaHashedKeyGenParams.h"
#include "CryptoAlgorithmRsaOaepParams.h"
#include "CryptoKeyPair.h"
#include "CryptoKeyRSA.h"
#include <variant>
#include <wtf/CrossThreadCopier.h>
namespace WebCore {
namespace CryptoAlgorithmRSA_OAEPInternal {
static constexpr auto ALG1 = "RSA-OAEP"_s;
static constexpr auto ALG256 = "RSA-OAEP-256"_s;
static constexpr auto ALG384 = "RSA-OAEP-384"_s;
static constexpr auto ALG512 = "RSA-OAEP-512"_s;
}
Ref<CryptoAlgorithm> CryptoAlgorithmRSA_OAEP::create()
{
return adoptRef(*new CryptoAlgorithmRSA_OAEP);
}
CryptoAlgorithmIdentifier CryptoAlgorithmRSA_OAEP::identifier() const
{
return s_identifier;
}
void CryptoAlgorithmRSA_OAEP::encrypt(const CryptoAlgorithmParameters& parameters, Ref<CryptoKey>&& key, Vector<uint8_t>&& plainText, VectorCallback&& callback, ExceptionCallback&& exceptionCallback, ScriptExecutionContext& context, WorkQueue& workQueue)
{
if (key->type() != CryptoKeyType::Public) {
exceptionCallback(ExceptionCode::InvalidAccessError);
return;
}
dispatchOperationInWorkQueue(workQueue, context, WTFMove(callback), WTFMove(exceptionCallback),
[parameters = crossThreadCopy(downcast<CryptoAlgorithmRsaOaepParams>(parameters)), key = WTFMove(key), plainText = WTFMove(plainText)] {
return platformEncrypt(parameters, downcast<CryptoKeyRSA>(key.get()), plainText);
});
}
void CryptoAlgorithmRSA_OAEP::decrypt(const CryptoAlgorithmParameters& parameters, Ref<CryptoKey>&& key, Vector<uint8_t>&& cipherText, VectorCallback&& callback, ExceptionCallback&& exceptionCallback, ScriptExecutionContext& context, WorkQueue& workQueue)
{
if (key->type() != CryptoKeyType::Private) {
exceptionCallback(ExceptionCode::InvalidAccessError);
return;
}
dispatchOperationInWorkQueue(workQueue, context, WTFMove(callback), WTFMove(exceptionCallback),
[parameters = crossThreadCopy(downcast<CryptoAlgorithmRsaOaepParams>(parameters)), key = WTFMove(key), cipherText = WTFMove(cipherText)] {
return platformDecrypt(parameters, downcast<CryptoKeyRSA>(key.get()), cipherText);
});
}
void CryptoAlgorithmRSA_OAEP::generateKey(const CryptoAlgorithmParameters& parameters, bool extractable, CryptoKeyUsageBitmap usages, KeyOrKeyPairCallback&& callback, ExceptionCallback&& exceptionCallback, ScriptExecutionContext& context)
{
const auto& rsaParameters = downcast<CryptoAlgorithmRsaHashedKeyGenParams>(parameters);
if (usages & (CryptoKeyUsageSign | CryptoKeyUsageVerify | CryptoKeyUsageDeriveKey | CryptoKeyUsageDeriveBits)) {
exceptionCallback(ExceptionCode::SyntaxError);
return;
}
auto keyPairCallback = [capturedCallback = WTFMove(callback)](CryptoKeyPair&& pair) {
pair.publicKey->setUsagesBitmap(pair.publicKey->usagesBitmap() & (CryptoKeyUsageEncrypt | CryptoKeyUsageWrapKey));
pair.privateKey->setUsagesBitmap(pair.privateKey->usagesBitmap() & (CryptoKeyUsageDecrypt | CryptoKeyUsageUnwrapKey));
capturedCallback(WTFMove(pair));
};
auto failureCallback = [capturedCallback = WTFMove(exceptionCallback)]() {
capturedCallback(ExceptionCode::OperationError);
};
CryptoKeyRSA::generatePair(CryptoAlgorithmIdentifier::RSA_OAEP, rsaParameters.hashIdentifier, true, rsaParameters.modulusLength, rsaParameters.publicExponentVector(), extractable, usages, WTFMove(keyPairCallback), WTFMove(failureCallback), &context);
}
void CryptoAlgorithmRSA_OAEP::importKey(CryptoKeyFormat format, KeyData&& data, const CryptoAlgorithmParameters& parameters, bool extractable, CryptoKeyUsageBitmap usages, KeyCallback&& callback, ExceptionCallback&& exceptionCallback)
{
using namespace CryptoAlgorithmRSA_OAEPInternal;
const auto& rsaParameters = downcast<CryptoAlgorithmRsaHashedImportParams>(parameters);
RefPtr<CryptoKeyRSA> result;
switch (format) {
case CryptoKeyFormat::Jwk: {
JsonWebKey key = WTFMove(std::get<JsonWebKey>(data));
bool isUsagesAllowed = false;
if (!key.d.isNull()) {
isUsagesAllowed = isUsagesAllowed || !(usages ^ CryptoKeyUsageDecrypt);
isUsagesAllowed = isUsagesAllowed || !(usages ^ CryptoKeyUsageUnwrapKey);
isUsagesAllowed = isUsagesAllowed || !(usages ^ (CryptoKeyUsageDecrypt | CryptoKeyUsageUnwrapKey));
} else {
isUsagesAllowed = isUsagesAllowed || !(usages ^ CryptoKeyUsageEncrypt);
isUsagesAllowed = isUsagesAllowed || !(usages ^ CryptoKeyUsageWrapKey);
isUsagesAllowed = isUsagesAllowed || !(usages ^ (CryptoKeyUsageEncrypt | CryptoKeyUsageWrapKey));
}
isUsagesAllowed = isUsagesAllowed || !usages;
if (!isUsagesAllowed) {
exceptionCallback(ExceptionCode::SyntaxError);
return;
}
if (usages && !key.use.isNull() && key.use != "enc"_s) {
exceptionCallback(ExceptionCode::DataError);
return;
}
bool isMatched = false;
switch (rsaParameters.hashIdentifier) {
case CryptoAlgorithmIdentifier::SHA_1:
isMatched = key.alg.isNull() || key.alg == ALG1;
break;
case CryptoAlgorithmIdentifier::DEPRECATED_SHA_224:
RELEASE_ASSERT_NOT_REACHED_WITH_MESSAGE(sha224DeprecationMessage);
break;
case CryptoAlgorithmIdentifier::SHA_256:
isMatched = key.alg.isNull() || key.alg == ALG256;
break;
case CryptoAlgorithmIdentifier::SHA_384:
isMatched = key.alg.isNull() || key.alg == ALG384;
break;
case CryptoAlgorithmIdentifier::SHA_512:
isMatched = key.alg.isNull() || key.alg == ALG512;
break;
default:
break;
}
if (!isMatched) {
exceptionCallback(ExceptionCode::DataError);
return;
}
result = CryptoKeyRSA::importJwk(rsaParameters.identifier, rsaParameters.hashIdentifier, WTFMove(key), extractable, usages);
break;
}
case CryptoKeyFormat::Spki: {
if (usages && (usages ^ CryptoKeyUsageEncrypt) && (usages ^ CryptoKeyUsageWrapKey) && (usages ^ (CryptoKeyUsageEncrypt | CryptoKeyUsageWrapKey))) {
exceptionCallback(ExceptionCode::SyntaxError);
return;
}
// FIXME: <webkit.org/b/165436>
result = CryptoKeyRSA::importSpki(rsaParameters.identifier, rsaParameters.hashIdentifier, WTFMove(std::get<Vector<uint8_t>>(data)), extractable, usages);
break;
}
case CryptoKeyFormat::Pkcs8: {
if (usages && (usages ^ CryptoKeyUsageDecrypt) && (usages ^ CryptoKeyUsageUnwrapKey) && (usages ^ (CryptoKeyUsageDecrypt | CryptoKeyUsageUnwrapKey))) {
exceptionCallback(ExceptionCode::SyntaxError);
return;
}
// FIXME: <webkit.org/b/165436>
result = CryptoKeyRSA::importPkcs8(parameters.identifier, rsaParameters.hashIdentifier, WTFMove(std::get<Vector<uint8_t>>(data)), extractable, usages);
break;
}
default:
exceptionCallback(ExceptionCode::NotSupportedError);
return;
}
if (!result) {
exceptionCallback(ExceptionCode::DataError);
return;
}
callback(*result);
}
void CryptoAlgorithmRSA_OAEP::exportKey(CryptoKeyFormat format, Ref<CryptoKey>&& key, KeyDataCallback&& callback, ExceptionCallback&& exceptionCallback)
{
using namespace CryptoAlgorithmRSA_OAEPInternal;
const auto& rsaKey = downcast<CryptoKeyRSA>(key.get());
if (!rsaKey.keySizeInBits()) {
exceptionCallback(ExceptionCode::OperationError);
return;
}
KeyData result;
switch (format) {
case CryptoKeyFormat::Jwk: {
JsonWebKey jwk = rsaKey.exportJwk();
switch (rsaKey.hashAlgorithmIdentifier()) {
case CryptoAlgorithmIdentifier::SHA_1:
jwk.alg = String(ALG1);
break;
case CryptoAlgorithmIdentifier::DEPRECATED_SHA_224:
RELEASE_ASSERT_NOT_REACHED_WITH_MESSAGE(sha224DeprecationMessage);
break;
case CryptoAlgorithmIdentifier::SHA_256:
jwk.alg = String(ALG256);
break;
case CryptoAlgorithmIdentifier::SHA_384:
jwk.alg = String(ALG384);
break;
case CryptoAlgorithmIdentifier::SHA_512:
jwk.alg = String(ALG512);
break;
default:
ASSERT_NOT_REACHED();
}
result = WTFMove(jwk);
break;
}
case CryptoKeyFormat::Spki: {
// FIXME: <webkit.org/b/165437>
auto spki = rsaKey.exportSpki();
if (spki.hasException()) {
exceptionCallback(spki.releaseException().code());
return;
}
result = spki.releaseReturnValue();
break;
}
case CryptoKeyFormat::Pkcs8: {
// FIXME: <webkit.org/b/165437>
auto pkcs8 = rsaKey.exportPkcs8();
if (pkcs8.hasException()) {
exceptionCallback(pkcs8.releaseException().code());
return;
}
result = pkcs8.releaseReturnValue();
break;
}
default:
exceptionCallback(ExceptionCode::NotSupportedError);
return;
}
callback(format, WTFMove(result));
}
} // namespace WebCore
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