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/* Copyright (c) 2000 - 2013 Samsung Electronics Co., Ltd All Rights Reserved
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License
*
*
* @file crypto.h
* @author Bartlomiej Grzelewski (b.grzelewski@samsung.com)
* @version 1.0
* @brief Crypto module implementation.
*/
#pragma once
#include <vector>
#include <openssl/evp.h>
#include <dpl/log/log.h>
#include <dpl/raw-buffer.h>
#include <generic-backend/exception.h>
namespace CKM {
namespace Crypto {
namespace SW {
namespace Cipher {
template<class T>
struct Base {
Base() : m_ctx(EVP_CIPHER_CTX_new())
{
static_assert(sizeof(typename T::value_type) == 1,
"Unsupported type inside conatainer.");
}
Base(const Base &) = delete;
Base(Base &&) = delete;
Base<T> &operator=(const Base &) = delete;
Base<T> &operator=(Base &&) = delete;
// Low level api.
// Allows various cipher specific parameters to be determined and set.
int Control(int type, int arg, void *ptr)
{
return EVP_CIPHER_CTX_ctrl(m_ctx, type, arg, ptr);
}
virtual void AppendAAD(const T &) = 0;
virtual T Append(const T &) = 0;
virtual T Finalize() = 0;
virtual ~Base()
{
EVP_CIPHER_CTX_free(m_ctx);
}
protected:
EVP_CIPHER_CTX *m_ctx;
};
template<class T>
class EvpCipherWrapper : public Base<T> {
public:
using Base<T>::m_ctx;
EvpCipherWrapper(const EVP_CIPHER *type, const T &key, const T &iv,
bool encryption)
{
if (static_cast<int>(key.size()) != EVP_CIPHER_key_length(type))
ThrowErr(Exc::Crypto::InternalError, "Wrong key size! Expected: ",
EVP_CIPHER_key_length(type), " Get: ", key.size());
if (static_cast<int>(iv.size()) < EVP_CIPHER_iv_length(type))
ThrowErr(Exc::Crypto::InternalError, "Wrong iv size! Expected: ",
EVP_CIPHER_iv_length(type), " Get: ", iv.size());
if (1 != EVP_CipherInit_ex(m_ctx, type, NULL, key.data(), iv.data(),
encryption ? 1 : 0))
ThrowErr(Exc::Crypto::InternalError, "Failed in EVP_CipherInit");
EVP_CIPHER_CTX_set_padding(m_ctx, 1);
}
void AppendAAD(const T &data)
{
static_assert(sizeof(typename T::value_type) == 1,
"Unsupported type inside container.");
int bytesLen;
if (1 != EVP_CipherUpdate(m_ctx, NULL, &bytesLen, data.data(), data.size()))
ThrowErr(Exc::Crypto::InternalError, "AppendAAD(): Failed in EVP_CipherUpdate");
}
T Append(const T &data)
{
static_assert(sizeof(typename T::value_type) == 1,
"Unsupported type inside container.");
int bytesLen = static_cast<int>(data.size() + EVP_CIPHER_CTX_block_size(m_ctx));
T output(bytesLen);
if (1 != EVP_CipherUpdate(m_ctx, output.data(), &bytesLen, data.data(),
data.size()))
ThrowErr(Exc::Crypto::InternalError, "Append(): Failed in EVP_CipherUpdate");
output.resize(bytesLen);
return output;
}
T Finalize()
{
int bytesLen = EVP_CIPHER_CTX_block_size(m_ctx);
T output(bytesLen);
if (1 != EVP_CipherFinal_ex(m_ctx, output.data(), &bytesLen))
ThrowErr(Exc::Crypto::InternalError, "Failed in EVP_CipherFinal");
output.resize(bytesLen);
return output;
}
};
#define DEFINE_CIPHER(__classname, __type, __evpcipher, __encryption) \
class __classname : public EvpCipherWrapper<__type> { \
public: \
__classname(const __type &key, const __type &iv) : \
EvpCipherWrapper(__evpcipher, key, iv, __encryption) {} \
}
DEFINE_CIPHER(AesCbcEncryption128, RawBuffer, EVP_aes_128_cbc(), true);
DEFINE_CIPHER(AesCbcDecryption128, RawBuffer, EVP_aes_128_cbc(), false);
DEFINE_CIPHER(AesCbcEncryption192, RawBuffer, EVP_aes_192_cbc(), true);
DEFINE_CIPHER(AesCbcDecryption192, RawBuffer, EVP_aes_192_cbc(), false);
DEFINE_CIPHER(AesCbcEncryption256, RawBuffer, EVP_aes_256_cbc(), true);
DEFINE_CIPHER(AesCbcDecryption256, RawBuffer, EVP_aes_256_cbc(), false);
DEFINE_CIPHER(AesGcmEncryption128, RawBuffer, EVP_aes_128_gcm(), true);
DEFINE_CIPHER(AesGcmDecryption128, RawBuffer, EVP_aes_128_gcm(), false);
DEFINE_CIPHER(AesGcmEncryption192, RawBuffer, EVP_aes_192_gcm(), true);
DEFINE_CIPHER(AesGcmDecryption192, RawBuffer, EVP_aes_192_gcm(), false);
DEFINE_CIPHER(AesGcmEncryption256, RawBuffer, EVP_aes_256_gcm(), true);
DEFINE_CIPHER(AesGcmDecryption256, RawBuffer, EVP_aes_256_gcm(), false);
DEFINE_CIPHER(AesCtrEncryption128, RawBuffer, EVP_aes_128_ctr(), true);
DEFINE_CIPHER(AesCtrDecryption128, RawBuffer, EVP_aes_128_ctr(), false);
DEFINE_CIPHER(AesCtrEncryption192, RawBuffer, EVP_aes_192_ctr(), true);
DEFINE_CIPHER(AesCtrDecryption192, RawBuffer, EVP_aes_192_ctr(), false);
DEFINE_CIPHER(AesCtrEncryption256, RawBuffer, EVP_aes_256_ctr(), true);
DEFINE_CIPHER(AesCtrDecryption256, RawBuffer, EVP_aes_256_ctr(), false);
DEFINE_CIPHER(AesCfbEncryption128, RawBuffer, EVP_aes_128_cfb(), true);
DEFINE_CIPHER(AesCfbDecryption128, RawBuffer, EVP_aes_128_cfb(), false);
DEFINE_CIPHER(AesCfbEncryption192, RawBuffer, EVP_aes_192_cfb(), true);
DEFINE_CIPHER(AesCfbDecryption192, RawBuffer, EVP_aes_192_cfb(), false);
DEFINE_CIPHER(AesCfbEncryption256, RawBuffer, EVP_aes_256_cfb(), true);
DEFINE_CIPHER(AesCfbDecryption256, RawBuffer, EVP_aes_256_cfb(), false);
#undef DEFINE_CIPHER
} // namespace Cipher
} // namespace SW
} // namespace Crypto
} // namespace CKM
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