/**
* \file
* \author Egor Tensin <Egor.Tensin@gmail.com>
* \date 2015
* \copyright This file is licensed under the terms of the MIT License.
* See LICENSE.txt for details.
* \brief Declares 128-bit block encryption/decryption functions.
*/
#pragma once
/**
* \defgroup aesni_block_api Block API
* \brief 128-bit block encryption/decryption functions.
* \ingroup aesni
* \{
*
* For each of AES-128/192/256, two functions are defined:
*
* * a key schedule "expansion" function to prepare for encryption,
* * a key schedule "reversion" function to prepare for decryption.
*
* The functions, respectively, are:
*
* * `aesni_expand_key_scheduleNNN`,
* * `aesni_reverse_key_scheduleNNN`,
*
* where `NNN` is either `128`, `192` or `256`.
*
* For each of AES-128/192/256 and modes of operation ECB, CBC, CFB, OFB, and
* CTR, two functions are defined:
*
* * a 128-bit block encryption function,
* * a 128-bit block decryption function.
*
* The functions, respectively, are:
*
* * `aesni_encrypt_block_XXXNNN`,
* * `aesni_decrypt_block_XXXNNN`,
*
* where `XXX` is either `ecb`, `cbc`, `cfb`, `ofb` or `ctr`, and `NNN` is
* either `128`, `192` or `256`.
*/
#include "data.h"
#include "raw.h"
#include <assert.h>
#ifdef __cplusplus
extern "C"
{
#endif
/**
* Expands a key schedule for AES-128 encryption.
*
* \param[in] key The AES-128 key.
* \param[out] key_schedule The AES-128 encryption key schedule. Must not be `NULL`.
*/
static __inline void __fastcall aesni_expand_key_schedule128(
AesNI_Block128 key,
AesNI_KeySchedule128* key_schedule)
{
assert(key_schedule);
aesni_raw_expand_key_schedule128(key, key_schedule);
}
/**
* "Reverses" a key schedule for AES-128 "equivalent inverse cipher" decryption.
*
* \param[in] key_schedule The AES-128 encryption key schedule. Must not be `NULL`.
* \param[out] inverted_schedule The AES-128 decryption key schedule. Must not be `NULL`.
*/
static __inline void __fastcall aesni_invert_key_schedule128(
AesNI_KeySchedule128* key_schedule,
AesNI_KeySchedule128* inverted_schedule)
{
assert(key_schedule);
assert(inverted_schedule);
aesni_raw_invert_key_schedule128(key_schedule, inverted_schedule);
}
/**
* Encrypts a 128-bit block using AES-128 in ECB mode of operation.
*
* \param[in] plain The plaintext to be encrypted.
* \param[in] key_schedule The AES-128 encryption schedule. Must not be `NULL`.
* \return The encrypted 128-bit ciphertext.
*/
static __inline AesNI_Block128 __fastcall aesni_encrypt_block_ecb128(
AesNI_Block128 plain,
AesNI_KeySchedule128* key_schedule)
{
assert(key_schedule);
return aesni_raw_encrypt_block128(plain, key_schedule);
}
/**
* Decrypts a 128-bit block using AES-128 in ECB mode of operation.
*
* \param[in] cipher The ciphertext to be decrypted.
* \param[in] inverted_schedule The AES-128 decryption ("reversed") key schedule. Must not be `NULL`.
* \return The decrypted 128-bit plaintext.
*/
static __inline AesNI_Block128 __fastcall aesni_decrypt_block_ecb128(
AesNI_Block128 cipher,
AesNI_KeySchedule128* inverted_schedule)
{
assert(inverted_schedule);
return aesni_raw_decrypt_block128(cipher, inverted_schedule);
}
/**
* Encrypts a 128-bit block using AES-128 in CBC mode of operation.
*
* \param[in] plain The plaintext to be encrypted.
* \param[in] key_schedule The AES-128 encryption key schedule. Must not be `NULL`.
* \param[in] init_vector The CBC initialization vector.
* \param[out] next_init_vector The next CBC initialization vector to be used as the initialization vector for the next call. Must not be `NULL`.
* \return The encrypted 128-bit ciphertext.
*/
static __inline AesNI_Block128 __fastcall aesni_encrypt_block_cbc128(
AesNI_Block128 plain,
AesNI_KeySchedule128* key_schedule,
AesNI_Block128 init_vector,
AesNI_Block128* next_init_vector)
{
assert(key_schedule);
assert(next_init_vector);
AesNI_Block128 cipher = aesni_raw_encrypt_block128(_mm_xor_si128(plain, init_vector), key_schedule);
*next_init_vector = cipher;
return cipher;
}
/**
* Decrypts a 128-bit block using AES-128 in CBC mode of operation.
*
* \param[in] cipher The ciphertext to be decrypted.
* \param[in] inverted_schedule The AES-128 decryption (reversed) key schedule. Must not be `NULL`.
* \param[in] init_vector The CBC initialization vector.
* \param[out] next_init_vector The next CBC initialization vector to be used as the initialization vector for the next call. Must not be `NULL`.
* \return The decrypted 128-bit plaintext.
*/
static __inline AesNI_Block128 __fastcall aesni_decrypt_block_cbc128(
AesNI_Block128 cipher,
AesNI_KeySchedule128* inverted_schedule,
AesNI_Block128 init_vector,
AesNI_Block128* next_init_vector)
{
assert(inverted_schedule);
assert(next_init_vector);
AesNI_Block128 plain = _mm_xor_si128(aesni_raw_decrypt_block128(cipher, inverted_schedule), init_vector);
*next_init_vector = cipher;
return plain;
}
/**
* Encrypts a 128-bit block using AES-128 in CFB mode of operation.
*
* \param[in] plain The plaintext to be encrypted.
* \param[in] key_schedule The AES-128 encryption schedule. Must not be `NULL`.
* \param[in] init_vector The CFB initialization vector.
* \param[out] next_init_vector The next CFB initialization vector to be used as the initialization vector for the next call. Must not be `NULL`.
* \return The encrypted 128-bit ciphertext.
*/
static __inline AesNI_Block128 __fastcall aesni_encrypt_block_cfb128(
AesNI_Block128 plain,
AesNI_KeySchedule128* key_schedule,
AesNI_Block128 init_vector,
AesNI_Block128* next_init_vector)
{
assert(key_schedule);
assert(next_init_vector);
AesNI_Block128 cipher = _mm_xor_si128(aesni_raw_encrypt_block128(init_vector, key_schedule), plain);
*next_init_vector = cipher;
return cipher;
}
/**
* Decrypts a 128-bit block using AES-128 in CFB mode of operation.
*
* \param[in] cipher The ciphertext to be decrypted.
* \param[in] key_schedule The AES-128 **encryption** key schedule. Must not be `NULL`.
* \param[in] init_vector The CFB initialization vector.
* \param[out] next_init_vector The next CFB initialization vector to be used as the initialization vector for the next call. Must not be `NULL`.
* \return The decrypted 128-bit plaintext.
*/
static __inline AesNI_Block128 __fastcall aesni_decrypt_block_cfb128(
AesNI_Block128 cipher,
AesNI_KeySchedule128* key_schedule,
AesNI_Block128 init_vector,
AesNI_Block128* next_init_vector)
{
assert(key_schedule);
assert(next_init_vector);
AesNI_Block128 plain = _mm_xor_si128(aesni_raw_encrypt_block128(init_vector, key_schedule), cipher);
*next_init_vector = cipher;
return plain;
}
/**
* Encrypts a 128-bit block using AES-128 in OFB mode of operation.
*
* \param[in] plain The plaintext to be encrypted.
* \param[in] key_schedule The AES-128 encryption schedule. Must not be `NULL`.
* \param[in] init_vector The OFB initialization vector.
* \param[out] next_init_vector The next OFB initialization vector to be used as the initialization vector for the next call. Must not be `NULL`.
* \return The encrypted 128-bit ciphertext.
*/
static __inline AesNI_Block128 __fastcall aesni_encrypt_block_ofb128(
AesNI_Block128 plain,
AesNI_KeySchedule128* key_schedule,
AesNI_Block128 init_vector,
AesNI_Block128* next_init_vector)
{
assert(key_schedule);
assert(next_init_vector);
AesNI_Block128 tmp = aesni_raw_encrypt_block128(init_vector, key_schedule);
*next_init_vector = tmp;
return _mm_xor_si128(tmp, plain);
}
/**
* Decrypts a 128-bit block using AES-128 in OFB mode of operation.
*
* \param[in] cipher The ciphertext to be decrypted.
* \param[in] key_schedule The AES-128 **encryption** key schedule. Must not be `NULL`.
* \param[in] init_vector The OFB initialization vector.
* \param[out] next_init_vector The next OFB initialization vector to be used as the initialization vector for the next call. Must not be `NULL`.
* \return The decrypted 128-bit plaintext.
*/
static __inline AesNI_Block128 __fastcall aesni_decrypt_block_ofb128(
AesNI_Block128 cipher,
AesNI_KeySchedule128* key_schedule,
AesNI_Block128 init_vector,
AesNI_Block128* next_init_vector)
{
assert(key_schedule);
assert(next_init_vector);
AesNI_Block128 tmp = aesni_raw_encrypt_block128(init_vector, key_schedule);
*next_init_vector = tmp;
return _mm_xor_si128(tmp, cipher);
}
/**
* Encrypts a 128-bit block using AES-128 in CTR mode of operation.
*
* \param[in] plain The plaintext to be encrypted.
* \param[in] key_schedule The AES-128 encryption key schedule. Must not be `NULL`.
* \param[in] init_vector The CTR initialization vector.
* \param[in] counter The counter, typically incremented between consecutive calls.
* \return The encrypted 128-bit ciphertext.
*/
static __inline AesNI_Block128 __fastcall aesni_encrypt_block_ctr128(
AesNI_Block128 plain,
AesNI_KeySchedule128* key_schedule,
AesNI_Block128 init_vector,
int counter)
{
assert(key_schedule);
init_vector = aesni_le2be128(init_vector);
init_vector = _mm_add_epi32(init_vector, aesni_make_block128(0, 0, 0, counter));
init_vector = aesni_be2le128(init_vector);
return _mm_xor_si128(plain, aesni_raw_encrypt_block128(init_vector, key_schedule));
}
/**
* Decrypts a 128-bit block using AES-128 in CTR mode of operation.
*
* \param[in] cipher The ciphertext to be decrypted.
* \param[in] key_schedule The AES-128 **encryption** key schedule. Must not be `NULL`.
* \param[in] init_vector The CTR initialization vector.
* \param[in] counter The counter, typically incremented between consecutive calls.
* \return The decrypted 128-bit plaintext.
*/
static __inline AesNI_Block128 __fastcall aesni_decrypt_block_ctr128(
AesNI_Block128 cipher,
AesNI_KeySchedule128* key_schedule,
AesNI_Block128 init_vector,
int counter)
{
assert(key_schedule);
init_vector = aesni_le2be128(init_vector);
init_vector = _mm_add_epi32(init_vector, aesni_make_block128(0, 0, 0, counter));
init_vector = aesni_be2le128(init_vector);
return _mm_xor_si128(cipher, aesni_raw_encrypt_block128(init_vector, key_schedule));
}
/**
* Expands a key schedule for AES-192 encryption.
*
* \param[in] key The AES-192 key. Must not be `NULL`.
* \param[out] key_schedule The AES-192 encryption key schedule. Must not be `NULL`.
*/
static __inline void __fastcall aesni_expand_key_schedule192(
AesNI_Block192* key,
AesNI_KeySchedule192* key_schedule)
{
assert(key);
assert(key_schedule);
aesni_raw_expand_key_schedule192(key->lo, key->hi, key_schedule);
}
/**
* "Reverses" a key schedule for AES-192 "equivalent inverse cipher" decryption.
*
* \param[in] key_schedule The AES-192 encryption key schedule. Must not be `NULL`.
* \param[out] inverted_schedule The AES-192 decryption key schedule. Must not be `NULL`.
*/
static __inline void __fastcall aesni_invert_key_schedule192(
AesNI_KeySchedule192* key_schedule,
AesNI_KeySchedule192* inverted_schedule)
{
assert(key_schedule);
assert(inverted_schedule);
aesni_raw_invert_key_schedule192(key_schedule, inverted_schedule);
}
/**
* Encrypts a 128-bit block using AES-192 in ECB mode of operation.
*
* \param[in] plain The plaintext to be encrypted.
* \param[in] key_schedule The AES-192 encryption schedule. Must not be `NULL`.
* \return The encrypted 128-bit ciphertext.
*/
static __inline AesNI_Block128 __fastcall aesni_encrypt_block_ecb192(
AesNI_Block128 plain,
AesNI_KeySchedule192* key_schedule)
{
assert(key_schedule);
return aesni_raw_encrypt_block192(plain, key_schedule);
}
/**
* Decrypts a 128-bit block using AES-192 in ECB mode of operation.
*
* \param[in] cipher The ciphertext to be decrypted.
* \param[in] inverted_schedule The AES-192 decryption (reversed) key schedule. Must not be `NULL`.
* \return The decrypted 128-bit plaintext.
*/
static __inline AesNI_Block128 __fastcall aesni_decrypt_block_ecb192(
AesNI_Block128 cipher,
AesNI_KeySchedule192* inverted_schedule)
{
assert(inverted_schedule);
return aesni_raw_decrypt_block192(cipher, inverted_schedule);
}
/**
* Encrypts a 128-bit block using AES-192 in CBC mode of operation.
*
* \param[in] plain The plaintext to be encrypted.
* \param[in] key_schedule The AES-192 encryption schedule. Must not be `NULL`.
* \param[in] init_vector The CBC initialization vector.
* \param[out] next_init_vector The next CBC initialization vector to be used as the initialization vector for the next call. Must not be `NULL`.
* \return The encrypted 128-bit ciphertext.
*/
static __inline AesNI_Block128 __fastcall aesni_encrypt_block_cbc192(
AesNI_Block128 plain,
AesNI_KeySchedule192* key_schedule,
AesNI_Block128 init_vector,
AesNI_Block128* next_init_vector)
{
assert(key_schedule);
assert(next_init_vector);
AesNI_Block128 cipher = aesni_raw_encrypt_block192(_mm_xor_si128(plain, init_vector), key_schedule);
*next_init_vector = cipher;
return cipher;
}
/**
* Decrypts a 128-bit block using AES-192 in CBC mode of operation.
*
* \param[in] cipher The ciphertext to be decrypted.
* \param[in] inverted_schedule The AES-192 decryption (reversed) key schedule. Must not be `NULL`.
* \param[in] init_vector The CBC initialization vector.
* \param[out] next_init_vector The next CBC initialization vector to be used as the initialization vector for the next call. Must not be `NULL`.
* \return The decrypted 128-bit plaintext.
*/
static __inline AesNI_Block128 __fastcall aesni_decrypt_block_cbc192(
AesNI_Block128 cipher,
AesNI_KeySchedule192* inverted_schedule,
AesNI_Block128 init_vector,
AesNI_Block128* next_init_vector)
{
assert(inverted_schedule);
assert(next_init_vector);
AesNI_Block128 plain = _mm_xor_si128(aesni_raw_decrypt_block192(cipher, inverted_schedule), init_vector);
*next_init_vector = cipher;
return plain;
}
/**
* Encrypts a 128-bit block using AES-192 in CFB mode of operation.
*
* \param[in] plain The plaintext to be encrypted.
* \param[in] key_schedule The AES-192 encryption schedule. Must not be `NULL`.
* \param[in] init_vector The CFB initialization vector.
* \param[out] next_init_vector The next CFB initialization vector to be used as the initialization vector for the next call. Must not be `NULL`.
* \return The encrypted 128-bit ciphertext.
*/
static __inline AesNI_Block128 __fastcall aesni_encrypt_block_cfb192(
AesNI_Block128 plain,
AesNI_KeySchedule192* key_schedule,
AesNI_Block128 init_vector,
AesNI_Block128* next_init_vector)
{
assert(key_schedule);
assert(next_init_vector);
AesNI_Block128 cipher = _mm_xor_si128(aesni_raw_encrypt_block192(init_vector, key_schedule), plain);
*next_init_vector = cipher;
return cipher;
}
/**
* Decrypts a 128-bit block using AES-192 in CFB mode of operation.
*
* \param[in] cipher The ciphertext to be decrypted.
* \param[in] key_schedule The AES-192 **encryption** key schedule. Must not be `NULL`.
* \param[in] init_vector The CFB initialization vector.
* \param[out] next_init_vector The next CFB initialization vector to be used as the initialization vector for the next call. Must not be `NULL`.
* \return The decrypted 128-bit plaintext.
*/
static __inline AesNI_Block128 __fastcall aesni_decrypt_block_cfb192(
AesNI_Block128 cipher,
AesNI_KeySchedule192* key_schedule,
AesNI_Block128 init_vector,
AesNI_Block128* next_init_vector)
{
assert(key_schedule);
assert(next_init_vector);
AesNI_Block128 plain = _mm_xor_si128(aesni_raw_encrypt_block192(init_vector, key_schedule), cipher);
*next_init_vector = cipher;
return plain;
}
/**
* Encrypts a 128-bit block using AES-192 in OFB mode of operation.
*
* \param[in] plain The plaintext to be encrypted.
* \param[in] key_schedule The AES-192 encryption schedule. Must not be `NULL`.
* \param[in] init_vector The OFB initialization vector.
* \param[out] next_init_vector The next OFB initialization vector to be used as the initialization vector for the next call. Must not be `NULL`.
* \return The encrypted 128-bit ciphertext.
*/
static __inline AesNI_Block128 __fastcall aesni_encrypt_block_ofb192(
AesNI_Block128 plain,
AesNI_KeySchedule192* key_schedule,
AesNI_Block128 init_vector,
AesNI_Block128* next_init_vector)
{
assert(key_schedule);
assert(next_init_vector);
AesNI_Block128 tmp = aesni_raw_encrypt_block192(init_vector, key_schedule);
*next_init_vector = tmp;
return _mm_xor_si128(tmp, plain);
}
/**
* Decrypts a 128-bit block using AES-192 in OFB mode of operation.
*
* \param[in] cipher The ciphertext to be decrypted.
* \param[in] key_schedule The AES-192 **encryption** key schedule. Must not be `NULL`.
* \param[in] init_vector The OFB initialization vector.
* \param[out] next_init_vector The next OFB initialization vector to be used as the initialization vector for the next call. Must not be `NULL`.
* \return The decrypted 128-bit plaintext.
*/
static __inline AesNI_Block128 __fastcall aesni_decrypt_block_ofb192(
AesNI_Block128 cipher,
AesNI_KeySchedule192* key_schedule,
AesNI_Block128 init_vector,
AesNI_Block128* next_init_vector)
{
assert(key_schedule);
assert(next_init_vector);
AesNI_Block128 tmp = aesni_raw_encrypt_block192(init_vector, key_schedule);
*next_init_vector = tmp;
return _mm_xor_si128(tmp, cipher);
}
/**
* Encrypts a 128-bit block using AES-192 in CTR mode of operation.
*
* \param[in] plain The plaintext to be encrypted.
* \param[in] key_schedule The AES-192 encryption key schedule. Must not be `NULL`.
* \param[in] init_vector The CTR initialization vector.
* \param[in] counter The counter, typically incremented between consecutive calls.
* \return The encrypted 128-bit ciphertext.
*/
static __inline AesNI_Block128 __fastcall aesni_encrypt_block_ctr192(
AesNI_Block128 plain,
AesNI_KeySchedule192* key_schedule,
AesNI_Block128 init_vector,
int counter)
{
assert(key_schedule);
init_vector = aesni_le2be128(init_vector);
init_vector = _mm_add_epi32(init_vector, aesni_make_block128(0, 0, 0, counter));
init_vector = aesni_be2le128(init_vector);
return _mm_xor_si128(plain, aesni_raw_encrypt_block192(init_vector, key_schedule));
}
/**
* Decrypts a 128-bit block using AES-192 in CTR mode of operation.
*
* \param[in] cipher The ciphertext to be decrypted.
* \param[in] key_schedule The AES-192 **encryption** key schedule. Must not be `NULL`.
* \param[in] init_vector The CTR initialization vector.
* \param[in] counter The counter, typically incremented between consecutive calls.
* \return The decrypted 128-bit plaintext.
*/
static __inline AesNI_Block128 __fastcall aesni_decrypt_block_ctr192(
AesNI_Block128 cipher,
AesNI_KeySchedule192* key_schedule,
AesNI_Block128 init_vector,
int counter)
{
assert(key_schedule);
init_vector = aesni_le2be128(init_vector);
init_vector = _mm_add_epi32(init_vector, aesni_make_block128(0, 0, 0, counter));
init_vector = aesni_be2le128(init_vector);
return _mm_xor_si128(cipher, aesni_raw_encrypt_block192(init_vector, key_schedule));
}
/**
* Expands a key schedule for AES-256 encryption.
*
* \param[in] key The AES-256 key. Must not be `NULL`.
* \param[out] key_schedule The AES-256 encryption key schedule. Must not be `NULL`.
*/
static __inline void __fastcall aesni_expand_key_schedule256(
AesNI_Block256* key,
AesNI_KeySchedule256* key_schedule)
{
assert(key);
assert(key_schedule);
aesni_raw_expand_key_schedule256(key->lo, key->hi, key_schedule);
}
/**
* "Reverses" a key schedule for AES-256 "equivalent inverse cipher" decryption.
*
* \param[in] key_schedule The AES-256 encryption key schedule. Must not be `NULL`.
* \param[out] inverted_schedule The AES-256 decryption key schedule. Must not be `NULL`.
*/
static __inline void __fastcall aesni_invert_key_schedule256(
AesNI_KeySchedule256* key_schedule,
AesNI_KeySchedule256* inverted_schedule)
{
assert(key_schedule);
assert(inverted_schedule);
aesni_raw_invert_key_schedule256(key_schedule, inverted_schedule);
}
/**
* Encrypts a 128-bit block using AES-256 in ECB mode of operation.
*
* \param[in] plain The plaintext to be encrypted.
* \param[in] key_schedule The AES-256 encryption schedule. Must not be `NULL`.
* \return The encrypted 128-bit ciphertext.
*/
static __inline AesNI_Block128 __fastcall aesni_encrypt_block_ecb256(
AesNI_Block128 plain,
AesNI_KeySchedule256* key_schedule)
{
assert(key_schedule);
return aesni_raw_encrypt_block256(plain, key_schedule);
}
/**
* Decrypts a 128-bit block using AES-256 in ECB mode of operation.
*
* \param[in] cipher The ciphertext to be decrypted.
* \param[in] inverted_schedule The AES-256 decryption (reversed) key schedule. Must not be `NULL`.
* \return The decrypted 128-bit plaintext.
*/
static __inline AesNI_Block128 __fastcall aesni_decrypt_block_ecb256(
AesNI_Block128 cipher,
AesNI_KeySchedule256* inverted_schedule)
{
assert(inverted_schedule);
return aesni_raw_decrypt_block256(cipher, inverted_schedule);
}
/**
* Encrypts a 128-bit block using AES-256 in CBC mode of operation.
*
* \param[in] plain The plaintext to be encrypted.
* \param[in] key_schedule The AES-256 encryption schedule. Must not be `NULL`.
* \param[in] init_vector The CBC initialization vector.
* \param[out] next_init_vector The next CBC initialization vector to be used as the initialization vector for the next call. Must not be `NULL`.
* \return The encrypted 128-bit ciphertext.
*/
static __inline AesNI_Block128 __fastcall aesni_encrypt_block_cbc256(
AesNI_Block128 plain,
AesNI_KeySchedule256* key_schedule,
AesNI_Block128 init_vector,
AesNI_Block128* next_init_vector)
{
assert(key_schedule);
assert(next_init_vector);
AesNI_Block128 cipher = aesni_raw_encrypt_block256(_mm_xor_si128(plain, init_vector), key_schedule);
*next_init_vector = cipher;
return cipher;
}
/**
* Decrypts a 128-bit block using AES-256 in CBC mode of operation.
*
* \param[in] cipher The ciphertext to be decrypted.
* \param[in] inverted_schedule The AES-256 decryption (reversed) key schedule. Must not be `NULL`.
* \param[in] init_vector The CBC initialization vector.
* \param[out] next_init_vector The next CBC initialization vector to be used as the initialization vector for the next call. Must not be `NULL`.
* \return The decrypted 128-bit plaintext.
*/
static __inline AesNI_Block128 __fastcall aesni_decrypt_block_cbc256(
AesNI_Block128 cipher,
AesNI_KeySchedule256* inverted_schedule,
AesNI_Block128 init_vector,
AesNI_Block128* next_init_vector)
{
assert(inverted_schedule);
assert(next_init_vector);
AesNI_Block128 plain = _mm_xor_si128(aesni_raw_decrypt_block256(cipher, inverted_schedule), init_vector);
*next_init_vector = cipher;
return plain;
}
/**
* Encrypts a 128-bit block using AES-256 in CFB mode of operation.
*
* \param[in] plain The plaintext to be encrypted.
* \param[in] key_schedule The AES-256 encryption schedule. Must not be `NULL`.
* \param[in] init_vector The CFB initialization vector.
* \param[out] next_init_vector The next CFB initialization vector to be used as the initialization vector for the next call. Must not be `NULL`.
* \return The encrypted 128-bit ciphertext.
*/
static __inline AesNI_Block128 __fastcall aesni_encrypt_block_cfb256(
AesNI_Block128 plain,
AesNI_KeySchedule256* key_schedule,
AesNI_Block128 init_vector,
AesNI_Block128* next_init_vector)
{
assert(key_schedule);
assert(next_init_vector);
AesNI_Block128 cipher = _mm_xor_si128(aesni_raw_encrypt_block256(init_vector, key_schedule), plain);
*next_init_vector = cipher;
return cipher;
}
/**
* Decrypts a 128-bit block using AES-256 in CFB mode of operation.
*
* \param[in] cipher The ciphertext to be decrypted.
* \param[in] key_schedule The AES-256 **encryption** key schedule. Must not be `NULL`.
* \param[in] init_vector The CFB initialization vector.
* \param[out] next_init_vector The next CFB initialization vector to be used as the initialization vector for the next call. Must not be `NULL`.
* \return The decrypted 128-bit plaintext.
*/
static __inline AesNI_Block128 __fastcall aesni_decrypt_block_cfb256(
AesNI_Block128 cipher,
AesNI_KeySchedule256* key_schedule,
AesNI_Block128 init_vector,
AesNI_Block128* next_init_vector)
{
assert(key_schedule);
assert(next_init_vector);
AesNI_Block128 plain = _mm_xor_si128(aesni_raw_encrypt_block256(init_vector, key_schedule), cipher);
*next_init_vector = cipher;
return plain;
}
/**
* Encrypts a 128-bit block using AES-256 in OFB mode of operation.
*
* \param[in] plain The plaintext to be encrypted.
* \param[in] key_schedule The AES-256 encryption schedule. Must not be `NULL`.
* \param[in] init_vector The OFB initialization vector.
* \param[out] next_init_vector The next OFB initialization vector to be used as the initialization vector for the next call. Must not be `NULL`.
* \return The encrypted 128-bit ciphertext.
*/
static __inline AesNI_Block128 __fastcall aesni_encrypt_block_ofb256(
AesNI_Block128 plain,
AesNI_KeySchedule256* key_schedule,
AesNI_Block128 init_vector,
AesNI_Block128* next_init_vector)
{
assert(key_schedule);
assert(next_init_vector);
AesNI_Block128 tmp = aesni_raw_encrypt_block256(init_vector, key_schedule);
*next_init_vector = tmp;
return _mm_xor_si128(tmp, plain);
}
/**
* Decrypts a 128-bit block using AES-256 in OFB mode of operation.
*
* \param[in] cipher The ciphertext to be decrypted.
* \param[in] key_schedule The AES-256 **encryption** key schedule. Must not be `NULL`.
* \param[in] init_vector The OFB initialization vector.
* \param[out] next_init_vector The next OFB initialization vector to be used as the initialization vector for the next call. Must not be `NULL`.
* \return The decrypted 128-bit plaintext.
*/
static __inline AesNI_Block128 __fastcall aesni_decrypt_block_ofb256(
AesNI_Block128 cipher,
AesNI_KeySchedule256* key_schedule,
AesNI_Block128 init_vector,
AesNI_Block128* next_init_vector)
{
assert(key_schedule);
assert(next_init_vector);
AesNI_Block128 tmp = aesni_raw_encrypt_block256(init_vector, key_schedule);
*next_init_vector = tmp;
return _mm_xor_si128(tmp, cipher);
}
/**
* Encrypts a 128-bit block using AES-256 in CTR mode of operation.
*
* \param[in] plain The plaintext to be encrypted.
* \param[in] key_schedule The AES-256 encryption key schedule. Must not be `NULL`.
* \param[in] init_vector The CTR initialization vector.
* \param[in] counter The counter, typically incremented between consecutive calls.
* \return The encrypted 128-bit ciphertext.
*/
static __inline AesNI_Block128 __fastcall aesni_encrypt_block_ctr256(
AesNI_Block128 plain,
AesNI_KeySchedule256* key_schedule,
AesNI_Block128 init_vector,
int counter)
{
assert(key_schedule);
init_vector = aesni_le2be128(init_vector);
init_vector = _mm_add_epi32(init_vector, aesni_make_block128(0, 0, 0, counter));
init_vector = aesni_be2le128(init_vector);
return _mm_xor_si128(plain, aesni_raw_encrypt_block256(init_vector, key_schedule));
}
/**
* Decrypts a 128-bit block using AES-256 in CTR mode of operation.
*
* \param[in] cipher The ciphertext to be decrypted.
* \param[in] key_schedule The AES-256 **encryption** key schedule. Must not be `NULL`.
* \param[in] init_vector The CTR initialization vector.
* \param[in] counter The counter, typically incremented between consecutive calls.
* \return The decrypted 128-bit plaintext.
*/
static __inline AesNI_Block128 __fastcall aesni_decrypt_block_ctr256(
AesNI_Block128 cipher,
AesNI_KeySchedule256* key_schedule,
AesNI_Block128 init_vector,
int counter)
{
assert(key_schedule);
init_vector = aesni_le2be128(init_vector);
init_vector = _mm_add_epi32(init_vector, aesni_make_block128(0, 0, 0, counter));
init_vector = aesni_be2le128(init_vector);
return _mm_xor_si128(cipher, aesni_raw_encrypt_block256(init_vector, key_schedule));
}
#ifdef __cplusplus
}
#endif
/**
* \}
*/
