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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef _RIJNDAEL_H_
#define _RIJNDAEL_H_ 1
#include "blapii.h"
#include <stdint.h>
#if defined(NSS_X86_OR_X64)
/* GCC <= 4.8 doesn't support including emmintrin.h without enabling SSE2 */
#if !defined(__clang__) && defined(__GNUC__) && defined(__GNUC_MINOR__) && \
(__GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ <= 8))
#pragma GCC push_options
#pragma GCC target("sse2")
#undef NSS_DISABLE_SSE2
#define NSS_DISABLE_SSE2 1
#endif /* GCC <= 4.8 */
#include <emmintrin.h> /* __m128i */
#ifdef NSS_DISABLE_SSE2
#undef NSS_DISABLE_SSE2
#pragma GCC pop_options
#endif /* NSS_DISABLE_SSE2 */
#endif
typedef void AESBlockFunc(AESContext *cx,
unsigned char *output,
const unsigned char *input);
/* RIJNDAEL_NUM_ROUNDS
*
* Number of rounds per execution
* Nk - number of key bytes
* Nb - blocksize (in bytes)
*/
#define RIJNDAEL_NUM_ROUNDS(Nk, Nb) \
(PR_MAX(Nk, Nb) + 6)
/*
* This magic number is (Nb_max * (Nr_max + 1))
* where Nb_max is the maximum block size in 32-bit words,
* Nr_max is the maximum number of rounds, which is Nb_max + 6
*/
#define RIJNDAEL_MAX_EXP_KEY_SIZE (4 * 15)
/* AESContextStr
*
* Values which maintain the state for Rijndael encryption/decryption.
*
* keySchedule - 128-bit registers for the key-schedule
* iv - initialization vector for CBC mode
* Nb - the number of bytes in a block, specified by user
* Nr - the number of rounds, specified by a table
* expandedKey - the round keys in 4-byte words, the length is Nr * Nb
* worker - the encryption/decryption function to use with worker_cx
* destroy - if not NULL, the destroy function to use with worker_cx
* worker_cx - the context for worker and destroy
* isBlock - is the mode of operation a block cipher or a stream cipher?
*/
struct AESContextStr {
/* NOTE: Offsets to members in this struct are hardcoded in assembly.
* Don't change the struct without updating intel-aes.s and intel-gcm.s. */
union {
#if defined(NSS_X86_OR_X64)
__m128i keySchedule[15];
#endif
PRUint32 expandedKey[RIJNDAEL_MAX_EXP_KEY_SIZE];
};
unsigned int Nb;
unsigned int Nr;
freeblCipherFunc worker;
unsigned char iv[AES_BLOCK_SIZE];
freeblDestroyFunc destroy;
void *worker_cx;
PRBool isBlock;
int mode;
void *mem; /* Start of the allocated memory to free. */
};
#endif /* _RIJNDAEL_H_ */
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