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/* VAES/AVX2 accelerated AES for Libgcrypt
* Copyright (C) 2021 Jussi Kivilinna <jussi.kivilinna@iki.fi>
*
* This file is part of Libgcrypt.
*
* Libgcrypt is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* Libgcrypt is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, see <http://www.gnu.org/licenses/>.
*
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include "types.h" /* for byte and u32 typedefs */
#include "g10lib.h"
#include "cipher.h"
#include "bufhelp.h"
#include "rijndael-internal.h"
#include "./cipher-internal.h"
#ifdef USE_VAES
# ifdef HAVE_COMPATIBLE_GCC_WIN64_PLATFORM_AS
# define ASM_FUNC_ABI __attribute__((sysv_abi))
# else
# define ASM_FUNC_ABI
# endif
extern void _gcry_aes_aesni_prepare_decryption(RIJNDAEL_context *ctx);
extern void _gcry_vaes_avx2_cbc_dec_amd64 (const void *keysched,
unsigned char *iv,
void *outbuf_arg,
const void *inbuf_arg,
size_t nblocks,
unsigned int nrounds) ASM_FUNC_ABI;
extern void _gcry_vaes_avx2_cfb_dec_amd64 (const void *keysched,
unsigned char *iv,
void *outbuf_arg,
const void *inbuf_arg,
size_t nblocks,
unsigned int nrounds) ASM_FUNC_ABI;
extern void _gcry_vaes_avx2_ctr_enc_amd64 (const void *keysched,
unsigned char *ctr,
void *outbuf_arg,
const void *inbuf_arg,
size_t nblocks,
unsigned int nrounds) ASM_FUNC_ABI;
extern void _gcry_vaes_avx2_ctr32le_enc_amd64 (const void *keysched,
unsigned char *ctr,
void *outbuf_arg,
const void *inbuf_arg,
size_t nblocks,
unsigned int nrounds)
ASM_FUNC_ABI;
extern void _gcry_vaes_avx2_ocb_crypt_amd64 (const void *keysched,
unsigned int blkn,
void *outbuf_arg,
const void *inbuf_arg,
size_t nblocks,
unsigned int nrounds,
unsigned char *offset,
unsigned char *checksum,
unsigned char *L_table,
int encrypt) ASM_FUNC_ABI;
extern void _gcry_vaes_avx2_xts_crypt_amd64 (const void *keysched,
unsigned char *tweak,
void *outbuf_arg,
const void *inbuf_arg,
size_t nblocks,
unsigned int nrounds,
int encrypt) ASM_FUNC_ABI;
extern void _gcry_vaes_avx2_ecb_crypt_amd64 (const void *keysched,
int encrypt,
void *outbuf_arg,
const void *inbuf_arg,
size_t nblocks,
unsigned int nrounds) ASM_FUNC_ABI;
void
_gcry_aes_vaes_ecb_crypt (void *context, void *outbuf,
const void *inbuf, size_t nblocks,
int encrypt)
{
RIJNDAEL_context *ctx = context;
const void *keysched = encrypt ? ctx->keyschenc32 : ctx->keyschdec32;
unsigned int nrounds = ctx->rounds;
if (!encrypt && !ctx->decryption_prepared)
{
_gcry_aes_aesni_prepare_decryption (ctx);
ctx->decryption_prepared = 1;
}
_gcry_vaes_avx2_ecb_crypt_amd64 (keysched, encrypt, outbuf, inbuf,
nblocks, nrounds);
}
void
_gcry_aes_vaes_cbc_dec (void *context, unsigned char *iv,
void *outbuf, const void *inbuf,
size_t nblocks)
{
RIJNDAEL_context *ctx = context;
const void *keysched = ctx->keyschdec32;
unsigned int nrounds = ctx->rounds;
if (!ctx->decryption_prepared)
{
_gcry_aes_aesni_prepare_decryption (ctx);
ctx->decryption_prepared = 1;
}
_gcry_vaes_avx2_cbc_dec_amd64 (keysched, iv, outbuf, inbuf, nblocks, nrounds);
}
void
_gcry_aes_vaes_cfb_dec (void *context, unsigned char *iv,
void *outbuf, const void *inbuf,
size_t nblocks)
{
RIJNDAEL_context *ctx = context;
const void *keysched = ctx->keyschenc32;
unsigned int nrounds = ctx->rounds;
_gcry_vaes_avx2_cfb_dec_amd64 (keysched, iv, outbuf, inbuf, nblocks, nrounds);
}
void
_gcry_aes_vaes_ctr_enc (void *context, unsigned char *iv,
void *outbuf, const void *inbuf,
size_t nblocks)
{
RIJNDAEL_context *ctx = context;
const void *keysched = ctx->keyschenc32;
unsigned int nrounds = ctx->rounds;
_gcry_vaes_avx2_ctr_enc_amd64 (keysched, iv, outbuf, inbuf, nblocks, nrounds);
}
void
_gcry_aes_vaes_ctr32le_enc (void *context, unsigned char *iv,
void *outbuf, const void *inbuf,
size_t nblocks)
{
RIJNDAEL_context *ctx = context;
const void *keysched = ctx->keyschenc32;
unsigned int nrounds = ctx->rounds;
_gcry_vaes_avx2_ctr32le_enc_amd64 (keysched, iv, outbuf, inbuf, nblocks,
nrounds);
}
size_t
_gcry_aes_vaes_ocb_crypt (gcry_cipher_hd_t c, void *outbuf_arg,
const void *inbuf_arg, size_t nblocks,
int encrypt)
{
RIJNDAEL_context *ctx = (void *)&c->context.c;
const void *keysched = encrypt ? ctx->keyschenc32 : ctx->keyschdec32;
unsigned char *outbuf = outbuf_arg;
const unsigned char *inbuf = inbuf_arg;
unsigned int nrounds = ctx->rounds;
u64 blkn = c->u_mode.ocb.data_nblocks;
if (!encrypt && !ctx->decryption_prepared)
{
_gcry_aes_aesni_prepare_decryption (ctx);
ctx->decryption_prepared = 1;
}
c->u_mode.ocb.data_nblocks = blkn + nblocks;
_gcry_vaes_avx2_ocb_crypt_amd64 (keysched, (unsigned int)blkn, outbuf, inbuf,
nblocks, nrounds, c->u_iv.iv, c->u_ctr.ctr,
c->u_mode.ocb.L[0], encrypt);
return 0;
}
void
_gcry_aes_vaes_xts_crypt (void *context, unsigned char *tweak,
void *outbuf, const void *inbuf,
size_t nblocks, int encrypt)
{
RIJNDAEL_context *ctx = context;
const void *keysched = encrypt ? ctx->keyschenc32 : ctx->keyschdec32;
unsigned int nrounds = ctx->rounds;
if (!encrypt && !ctx->decryption_prepared)
{
_gcry_aes_aesni_prepare_decryption (ctx);
ctx->decryption_prepared = 1;
}
_gcry_vaes_avx2_xts_crypt_amd64 (keysched, tweak, outbuf, inbuf, nblocks,
nrounds, encrypt);
}
#endif /* USE_VAES */
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