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/*
* Copyright (C) 2021 Sony Interactive Entertainment Inc.
*
* 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 "CryptoAlgorithmRsaOaepParams.h"
#include "CryptoKeyRSA.h"
#include "OpenSSLUtilities.h"
namespace WebCore {
ExceptionOr<Vector<uint8_t>> CryptoAlgorithmRSA_OAEP::platformEncrypt(const CryptoAlgorithmRsaOaepParams& parameters, const CryptoKeyRSA& key, const Vector<uint8_t>& plainText)
{
#if defined(EVP_PKEY_CTX_set_rsa_oaep_md) && defined(EVP_PKEY_CTX_set_rsa_mgf1_md) && defined(EVP_PKEY_CTX_set0_rsa_oaep_label)
const EVP_MD* md = digestAlgorithm(key.hashAlgorithmIdentifier());
if (!md)
return Exception { ExceptionCode::NotSupportedError };
auto ctx = EvpPKeyCtxPtr(EVP_PKEY_CTX_new(key.platformKey(), nullptr));
if (!ctx)
return Exception { ExceptionCode::OperationError };
if (EVP_PKEY_encrypt_init(ctx.get()) <= 0)
return Exception { ExceptionCode::OperationError };
if (EVP_PKEY_CTX_set_rsa_padding(ctx.get(), RSA_PKCS1_OAEP_PADDING) <= 0)
return Exception { ExceptionCode::OperationError };
if (EVP_PKEY_CTX_set_rsa_oaep_md(ctx.get(), md) <= 0)
return Exception { ExceptionCode::OperationError };
if (EVP_PKEY_CTX_set_rsa_mgf1_md(ctx.get(), md) <= 0)
return Exception { ExceptionCode::OperationError };
if (!parameters.labelVector().isEmpty()) {
size_t labelSize = parameters.labelVector().size();
// The library takes ownership of the label so the caller should not free the original memory pointed to by label.
auto label = OPENSSL_malloc(labelSize);
memcpy(label, parameters.labelVector().data(), labelSize);
if (EVP_PKEY_CTX_set0_rsa_oaep_label(ctx.get(), label, labelSize) <= 0) {
OPENSSL_free(label);
return Exception { ExceptionCode::OperationError };
}
}
size_t cipherTextLen;
if (EVP_PKEY_encrypt(ctx.get(), nullptr, &cipherTextLen, plainText.data(), plainText.size()) <= 0)
return Exception { ExceptionCode::OperationError };
Vector<uint8_t> cipherText(cipherTextLen);
if (EVP_PKEY_encrypt(ctx.get(), cipherText.data(), &cipherTextLen, plainText.data(), plainText.size()) <= 0)
return Exception { ExceptionCode::OperationError };
cipherText.shrink(cipherTextLen);
return cipherText;
#else
return Exception { ExceptionCode::NotSupportedError };
#endif
}
ExceptionOr<Vector<uint8_t>> CryptoAlgorithmRSA_OAEP::platformDecrypt(const CryptoAlgorithmRsaOaepParams& parameters, const CryptoKeyRSA& key, const Vector<uint8_t>& cipherText)
{
#if defined(EVP_PKEY_CTX_set_rsa_oaep_md) && defined(EVP_PKEY_CTX_set_rsa_mgf1_md) && defined(EVP_PKEY_CTX_set0_rsa_oaep_label)
const EVP_MD* md = digestAlgorithm(key.hashAlgorithmIdentifier());
if (!md)
return Exception { ExceptionCode::NotSupportedError };
auto ctx = EvpPKeyCtxPtr(EVP_PKEY_CTX_new(key.platformKey(), nullptr));
if (!ctx)
return Exception { ExceptionCode::OperationError };
if (EVP_PKEY_decrypt_init(ctx.get()) <= 0)
return Exception { ExceptionCode::OperationError };
if (EVP_PKEY_CTX_set_rsa_padding(ctx.get(), RSA_PKCS1_OAEP_PADDING) <= 0)
return Exception { ExceptionCode::OperationError };
if (EVP_PKEY_CTX_set_rsa_oaep_md(ctx.get(), md) <= 0)
return Exception { ExceptionCode::OperationError };
if (EVP_PKEY_CTX_set_rsa_mgf1_md(ctx.get(), md) <= 0)
return Exception { ExceptionCode::OperationError };
if (!parameters.labelVector().isEmpty()) {
size_t labelSize = parameters.labelVector().size();
// The library takes ownership of the label so the caller should not free the original memory pointed to by label.
auto label = OPENSSL_malloc(labelSize);
memcpy(label, parameters.labelVector().data(), labelSize);
if (EVP_PKEY_CTX_set0_rsa_oaep_label(ctx.get(), label, labelSize) <= 0) {
OPENSSL_free(label);
return Exception { ExceptionCode::OperationError };
}
}
size_t plainTextLen;
if (EVP_PKEY_decrypt(ctx.get(), nullptr, &plainTextLen, cipherText.data(), cipherText.size()) <= 0)
return Exception { ExceptionCode::OperationError };
Vector<uint8_t> plainText(plainTextLen);
if (EVP_PKEY_decrypt(ctx.get(), plainText.data(), &plainTextLen, cipherText.data(), cipherText.size()) <= 0)
return Exception { ExceptionCode::OperationError };
plainText.shrink(plainTextLen);
return plainText;
#else
return Exception { ExceptionCode::NotSupportedError };
#endif
}
} // namespace WebCore
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