void CryptoAlgorithmRSASSA_PKCS1_v1_5::platformSign(const CryptoAlgorithmRsaSsaParams& parameters, const CryptoKeyRSA& key, const CryptoOperationData& data, VectorCallback callback, VoidCallback failureCallback, ExceptionCode& ec)
{
CCDigestAlgorithm digestAlgorithm;
if (!getCommonCryptoDigestAlgorithm(parameters.hash, digestAlgorithm)) {
ec = NOT_SUPPORTED_ERR;
return;
}
std::unique_ptr<CryptoDigest> digest = CryptoDigest::create(parameters.hash);
if (!digest) {
ec = NOT_SUPPORTED_ERR;
return;
}
digest->addBytes(data.first, data.second);
Vector<uint8_t> digestData = digest->computeHash();
Vector<uint8_t> signature(512);
size_t signatureSize = signature.size();
CCCryptorStatus status = CCRSACryptorSign(key.platformKey(), ccPKCS1Padding, digestData.data(), digestData.size(), digestAlgorithm, 0, signature.data(), &signatureSize);
if (status) {
failureCallback();
return;
}
signature.resize(signatureSize);
callback(signature);
}
void CryptoAlgorithmRSASSA_PKCS1_v1_5::platformVerify(const CryptoAlgorithmRsaSsaParams& parameters, const CryptoKeyRSA& key, const CryptoOperationData& signature, const CryptoOperationData& data, BoolCallback callback, VoidCallback failureCallback, ExceptionCode& ec)
{
CCDigestAlgorithm digestAlgorithm;
if (!getCommonCryptoDigestAlgorithm(parameters.hash, digestAlgorithm)) {
ec = NOT_SUPPORTED_ERR;
return;
}
std::unique_ptr<CryptoDigest> digest = CryptoDigest::create(parameters.hash);
if (!digest) {
ec = NOT_SUPPORTED_ERR;
return;
}
digest->addBytes(data.first, data.second);
Vector<uint8_t> digestData = digest->computeHash();
CCCryptorStatus status = CCRSACryptorVerify(key.platformKey(), ccPKCS1Padding, digestData.data(), digestData.size(), digestAlgorithm, 0, signature.first, signature.second);
if (!status)
callback(true);
else if (status == kCCNotVerified || kCCDecodeError) // <rdar://problem/15464982> CCRSACryptorVerify returns kCCDecodeError instead of kCCNotVerified sometimes
callback(false);
else
failureCallback();
}
ExceptionOr<void> CryptoAlgorithmRSA_OAEP::platformDecrypt(const CryptoAlgorithmRsaOaepParamsDeprecated& parameters, const CryptoKeyRSA& key, const CryptoOperationData& data, VectorCallback&& callback, VoidCallback&& failureCallback)
{
ASSERT(parameters.hasLabel || parameters.label.isEmpty());
auto result = decryptRSA_OAEP(parameters.hash, parameters.label, key.platformKey(), key.keySizeInBits(), data.first, data.second);
if (result.hasException()) {
failureCallback();
return { };
}
callback(result.releaseReturnValue());
return { };
}
void CryptoAlgorithmRSA_OAEP::platformDecrypt(const CryptoAlgorithmRsaOaepParams& parameters, const CryptoKeyRSA& key, const CryptoOperationData& data, VectorCallback&& callback, VoidCallback&& failureCallback, ExceptionCode& ec)
{
CCDigestAlgorithm digestAlgorithm;
if (!getCommonCryptoDigestAlgorithm(parameters.hash, digestAlgorithm)) {
ec = NOT_SUPPORTED_ERR;
return;
}
Vector<uint8_t> plainText(1024);
size_t plainTextLength = plainText.size();
CCCryptorStatus status = CCRSACryptorDecrypt(key.platformKey(), ccOAEPPadding, data.first, data.second, plainText.data(), &plainTextLength, parameters.label.data(), parameters.label.size(), digestAlgorithm);
if (status) {
failureCallback();
return;
}
plainText.resize(plainTextLength);
callback(plainText);
}
