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// Copyright (c) 2015 Egor Tensin <Egor.Tensin@gmail.com>
// This file is part of the "AES tools" project.
// For details, see https://github.com/egor-tensin/aes-tools.
// Distributed under the MIT License.
#pragma once
#include <aes/all.h>
#include <type_traits>
namespace aes
{
typedef AES_Mode Mode;
template <Mode mode>
struct ModeRequiresInitVector : public std::true_type
{ };
template <>
struct ModeRequiresInitVector<AES_ECB> : public std::false_type
{ };
template <Mode mode>
struct ModeUsesEncryptionKeysOnly : public std::true_type
{ };
inline bool mode_requires_init_vector(Mode mode)
{
return mode != AES_ECB;
}
template <>
struct ModeUsesEncryptionKeysOnly<AES_ECB> : public std::false_type
{ };
template <>
struct ModeUsesEncryptionKeysOnly<AES_CBC> : public std::false_type
{ };
inline bool mode_uses_encryption_keys_only(Mode mode)
{
return mode != AES_ECB && mode != AES_CBC;
}
#define AESXX_ENCRYPT_BLOCK_ECB(prefix) \
template <> \
inline void encrypt_block<AES_## prefix, AES_ECB>( \
const typename Types<AES_## prefix>::Block& plaintext, \
const typename Types<AES_## prefix>::RoundKeys& encryption_keys, \
typename Types<AES_## prefix>::Block& ciphertext) \
{ \
ciphertext = aes_## prefix ##_encrypt_block_ECB(plaintext, &encryption_keys); \
}
#define AESXX_DECRYPT_BLOCK_ECB(prefix) \
template <> \
inline void decrypt_block<AES_## prefix, AES_ECB>( \
const typename Types<AES_## prefix>::Block& ciphertext, \
const typename Types<AES_## prefix>::RoundKeys& decryption_keys, \
typename Types<AES_## prefix>::Block& plaintext) \
{ \
plaintext = aes_## prefix ##_decrypt_block_ECB(ciphertext, &decryption_keys); \
}
#define AESXX_ENCRYPT_BLOCK_CBC(prefix) \
template <> \
inline void encrypt_block<AES_## prefix, AES_CBC>( \
const typename Types<AES_## prefix>::Block& plaintext, \
const typename Types<AES_## prefix>::RoundKeys& encryption_keys, \
typename Types<AES_## prefix>::Block& iv, \
typename Types<AES_## prefix>::Block& ciphertext) \
{ \
ciphertext = aes_## prefix ##_encrypt_block_CBC(plaintext, &encryption_keys, iv, &iv); \
}
#define AESXX_DECRYPT_BLOCK_CBC(prefix) \
template <> \
inline void decrypt_block<AES_## prefix, AES_CBC>( \
const typename Types<AES_## prefix>::Block& ciphertext, \
const typename Types<AES_## prefix>::RoundKeys& decryption_keys, \
typename Types<AES_## prefix>::Block& iv, \
typename Types<AES_## prefix>::Block& plaintext) \
{ \
plaintext = aes_## prefix ##_decrypt_block_CBC(ciphertext, &decryption_keys, iv, &iv); \
}
#define AESXX_ENCRYPT_BLOCK_CFB(prefix) \
template <> \
inline void encrypt_block<AES_## prefix, AES_CFB>( \
const typename Types<AES_## prefix>::Block& plaintext, \
const typename Types<AES_## prefix>::RoundKeys& encryption_keys, \
typename Types<AES_## prefix>::Block& iv, \
typename Types<AES_## prefix>::Block& ciphertext) \
{ \
ciphertext = aes_## prefix ##_encrypt_block_CFB(plaintext, &encryption_keys, iv, &iv); \
}
#define AESXX_DECRYPT_BLOCK_CFB(prefix) \
template <> \
inline void decrypt_block<AES_## prefix, AES_CFB>( \
const typename Types<AES_## prefix>::Block& ciphertext, \
const typename Types<AES_## prefix>::RoundKeys& encryption_keys, \
typename Types<AES_## prefix>::Block& iv, \
typename Types<AES_## prefix>::Block& plaintext) \
{ \
plaintext = aes_## prefix ##_decrypt_block_CFB(ciphertext, &encryption_keys, iv, &iv); \
}
#define AESXX_ENCRYPT_BLOCK_OFB(prefix) \
template <> \
inline void encrypt_block<AES_## prefix, AES_OFB>( \
const typename Types<AES_## prefix>::Block& plaintext, \
const typename Types<AES_## prefix>::RoundKeys& encryption_keys, \
typename Types<AES_## prefix>::Block& iv, \
typename Types<AES_## prefix>::Block& ciphertext) \
{ \
ciphertext = aes_## prefix ##_encrypt_block_OFB(plaintext, &encryption_keys, iv, &iv); \
}
#define AESXX_DECRYPT_BLOCK_OFB(prefix) \
template <> \
inline void decrypt_block<AES_## prefix, AES_OFB>( \
const typename Types<AES_## prefix>::Block& ciphertext, \
const typename Types<AES_## prefix>::RoundKeys& encryption_keys, \
typename Types<AES_## prefix>::Block& iv, \
typename Types<AES_## prefix>::Block& plaintext) \
{ \
plaintext = aes_## prefix ##_decrypt_block_OFB(ciphertext, &encryption_keys, iv, &iv); \
}
#define AESXX_ENCRYPT_BLOCK_CTR(prefix) \
template <> \
inline void encrypt_block<AES_## prefix, AES_CTR>( \
const typename Types<AES_## prefix>::Block& plaintext, \
const typename Types<AES_## prefix>::RoundKeys& encryption_keys, \
typename Types<AES_## prefix>::Block& iv, \
typename Types<AES_## prefix>::Block& ciphertext) \
{ \
ciphertext = aes_## prefix ##_encrypt_block_CTR(plaintext, &encryption_keys, iv, &iv); \
}
#define AESXX_DECRYPT_BLOCK_CTR(prefix) \
template <> \
inline void decrypt_block<AES_## prefix, AES_CTR>( \
const typename Types<AES_## prefix>::Block& ciphertext, \
const typename Types<AES_## prefix>::RoundKeys& encryption_keys, \
typename Types<AES_## prefix>::Block& iv, \
typename Types<AES_## prefix>::Block& plaintext) \
{ \
plaintext = aes_## prefix ##_decrypt_block_CTR(ciphertext, &encryption_keys, iv, &iv); \
}
}
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