CryptoAlgorithmAES_CBC.cpp [plain text]
#include "config.h"
#include "CryptoAlgorithmAES_CBC.h"
#if ENABLE(SUBTLE_CRYPTO)
#include "CryptoAlgorithmAesCbcCfbParams.h"
#include "CryptoAlgorithmAesCbcParamsDeprecated.h"
#include "CryptoAlgorithmAesKeyGenParamsDeprecated.h"
#include "CryptoAlgorithmAesKeyParams.h"
#include "CryptoKeyAES.h"
#include "CryptoKeyDataOctetSequence.h"
#include "ExceptionCode.h"
namespace WebCore {
static const char* const ALG128 = "A128CBC";
static const char* const ALG192 = "A192CBC";
static const char* const ALG256 = "A256CBC";
static const size_t IVSIZE = 16;
static inline bool usagesAreInvalidForCryptoAlgorithmAES_CBC(CryptoKeyUsageBitmap usages)
{
return usages & (CryptoKeyUsageSign | CryptoKeyUsageVerify | CryptoKeyUsageDeriveKey | CryptoKeyUsageDeriveBits);
}
Ref<CryptoAlgorithm> CryptoAlgorithmAES_CBC::create()
{
return adoptRef(*new CryptoAlgorithmAES_CBC);
}
CryptoAlgorithmIdentifier CryptoAlgorithmAES_CBC::identifier() const
{
return s_identifier;
}
bool CryptoAlgorithmAES_CBC::keyAlgorithmMatches(const CryptoAlgorithmAesCbcParamsDeprecated&, const CryptoKey& key) const
{
if (key.algorithmIdentifier() != s_identifier)
return false;
ASSERT(is<CryptoKeyAES>(key));
return true;
}
void CryptoAlgorithmAES_CBC::encrypt(std::unique_ptr<CryptoAlgorithmParameters>&& parameters, Ref<CryptoKey>&& key, Vector<uint8_t>&& plainText, VectorCallback&& callback, ExceptionCallback&& exceptionCallback, ScriptExecutionContext& context, WorkQueue& workQueue)
{
ASSERT(parameters);
auto& aesParameters = downcast<CryptoAlgorithmAesCbcCfbParams>(*parameters);
if (aesParameters.ivVector().size() != IVSIZE) {
exceptionCallback(OperationError);
return;
}
platformEncrypt(WTFMove(parameters), WTFMove(key), WTFMove(plainText), WTFMove(callback), WTFMove(exceptionCallback), context, workQueue);
}
void CryptoAlgorithmAES_CBC::decrypt(std::unique_ptr<CryptoAlgorithmParameters>&& parameters, Ref<CryptoKey>&& key, Vector<uint8_t>&& cipherText, VectorCallback&& callback, ExceptionCallback&& exceptionCallback, ScriptExecutionContext& context, WorkQueue& workQueue)
{
ASSERT(parameters);
auto& aesParameters = downcast<CryptoAlgorithmAesCbcCfbParams>(*parameters);
if (aesParameters.ivVector().size() != IVSIZE) {
exceptionCallback(OperationError);
return;
}
platformDecrypt(WTFMove(parameters), WTFMove(key), WTFMove(cipherText), WTFMove(callback), WTFMove(exceptionCallback), context, workQueue);
}
void CryptoAlgorithmAES_CBC::generateKey(const CryptoAlgorithmParameters& parameters, bool extractable, CryptoKeyUsageBitmap usages, KeyOrKeyPairCallback&& callback, ExceptionCallback&& exceptionCallback, ScriptExecutionContext&)
{
const auto& aesParameters = downcast<CryptoAlgorithmAesKeyParams>(parameters);
if (usagesAreInvalidForCryptoAlgorithmAES_CBC(usages)) {
exceptionCallback(SYNTAX_ERR);
return;
}
auto result = CryptoKeyAES::generate(CryptoAlgorithmIdentifier::AES_CBC, aesParameters.length, extractable, usages);
if (!result) {
exceptionCallback(OperationError);
return;
}
callback(WTFMove(result));
}
void CryptoAlgorithmAES_CBC::importKey(SubtleCrypto::KeyFormat format, KeyData&& data, const std::unique_ptr<CryptoAlgorithmParameters>&& parameters, bool extractable, CryptoKeyUsageBitmap usages, KeyCallback&& callback, ExceptionCallback&& exceptionCallback)
{
ASSERT(parameters);
if (usagesAreInvalidForCryptoAlgorithmAES_CBC(usages)) {
exceptionCallback(SYNTAX_ERR);
return;
}
RefPtr<CryptoKeyAES> result;
switch (format) {
case SubtleCrypto::KeyFormat::Raw:
result = CryptoKeyAES::importRaw(parameters->identifier, WTFMove(WTF::get<Vector<uint8_t>>(data)), extractable, usages);
break;
case SubtleCrypto::KeyFormat::Jwk: {
auto checkAlgCallback = [](size_t length, const String& alg) -> bool {
switch (length) {
case CryptoKeyAES::s_length128:
return alg.isNull() || alg == ALG128;
case CryptoKeyAES::s_length192:
return alg.isNull() || alg == ALG192;
case CryptoKeyAES::s_length256:
return alg.isNull() || alg == ALG256;
}
return false;
};
result = CryptoKeyAES::importJwk(parameters->identifier, WTFMove(WTF::get<JsonWebKey>(data)), extractable, usages, WTFMove(checkAlgCallback));
break;
}
default:
exceptionCallback(NOT_SUPPORTED_ERR);
return;
}
if (!result) {
exceptionCallback(DataError);
return;
}
callback(*result);
}
void CryptoAlgorithmAES_CBC::exportKey(SubtleCrypto::KeyFormat format, Ref<CryptoKey>&& key, KeyDataCallback&& callback, ExceptionCallback&& exceptionCallback)
{
const auto& aesKey = downcast<CryptoKeyAES>(key.get());
if (aesKey.key().isEmpty()) {
exceptionCallback(OperationError);
return;
}
KeyData result;
switch (format) {
case SubtleCrypto::KeyFormat::Raw:
result = Vector<uint8_t>(aesKey.key());
break;
case SubtleCrypto::KeyFormat::Jwk: {
JsonWebKey jwk = aesKey.exportJwk();
switch (aesKey.key().size() * 8) {
case CryptoKeyAES::s_length128:
jwk.alg = String(ALG128);
break;
case CryptoKeyAES::s_length192:
jwk.alg = String(ALG192);
break;
case CryptoKeyAES::s_length256:
jwk.alg = String(ALG256);
break;
default:
ASSERT_NOT_REACHED();
}
result = WTFMove(jwk);
break;
}
default:
exceptionCallback(NOT_SUPPORTED_ERR);
return;
}
callback(format, WTFMove(result));
}
ExceptionOr<size_t> CryptoAlgorithmAES_CBC::getKeyLength(const CryptoAlgorithmParameters& parameters)
{
return CryptoKeyAES::getKeyLength(parameters);
}
ExceptionOr<void> CryptoAlgorithmAES_CBC::encrypt(const CryptoAlgorithmParametersDeprecated& parameters, const CryptoKey& key, const CryptoOperationData& data, VectorCallback&& callback, VoidCallback&& failureCallback)
{
auto& aesCBCParameters = downcast<CryptoAlgorithmAesCbcParamsDeprecated>(parameters);
if (!keyAlgorithmMatches(aesCBCParameters, key))
return Exception { NOT_SUPPORTED_ERR };
return platformEncrypt(aesCBCParameters, downcast<CryptoKeyAES>(key), data, WTFMove(callback), WTFMove(failureCallback));
}
ExceptionOr<void> CryptoAlgorithmAES_CBC::decrypt(const CryptoAlgorithmParametersDeprecated& parameters, const CryptoKey& key, const CryptoOperationData& data, VectorCallback&& callback, VoidCallback&& failureCallback)
{
auto& aesCBCParameters = downcast<CryptoAlgorithmAesCbcParamsDeprecated>(parameters);
if (!keyAlgorithmMatches(aesCBCParameters, key))
return Exception { NOT_SUPPORTED_ERR };
return platformDecrypt(aesCBCParameters, downcast<CryptoKeyAES>(key), data, WTFMove(callback), WTFMove(failureCallback));
}
ExceptionOr<void> CryptoAlgorithmAES_CBC::generateKey(const CryptoAlgorithmParametersDeprecated& parameters, bool extractable, CryptoKeyUsageBitmap usages, KeyOrKeyPairCallback&& callback, VoidCallback&& failureCallback, ScriptExecutionContext&)
{
auto& aesParameters = downcast<CryptoAlgorithmAesKeyGenParamsDeprecated>(parameters);
auto result = CryptoKeyAES::generate(CryptoAlgorithmIdentifier::AES_CBC, aesParameters.length, extractable, usages);
if (!result) {
failureCallback();
return { };
}
callback(WTFMove(result));
return { };
}
ExceptionOr<void> CryptoAlgorithmAES_CBC::importKey(const CryptoAlgorithmParametersDeprecated&, const CryptoKeyData& keyData, bool extractable, CryptoKeyUsageBitmap usage, KeyCallback&& callback, VoidCallback&&)
{
if (!is<CryptoKeyDataOctetSequence>(keyData))
return Exception { NOT_SUPPORTED_ERR };
auto& keyDataOctetSequence = downcast<CryptoKeyDataOctetSequence>(keyData);
callback(CryptoKeyAES::create(CryptoAlgorithmIdentifier::AES_CBC, keyDataOctetSequence.octetSequence(), extractable, usage));
return { };
}
}
#endif // ENABLE(SUBTLE_CRYPTO)