615 lines
16 KiB
C
615 lines
16 KiB
C
/*
|
|
* Glue Code for AVX assembler version of Twofish Cipher
|
|
*
|
|
* Copyright (C) 2012 Johannes Goetzfried
|
|
* <Johannes.Goetzfried@informatik.stud.uni-erlangen.de>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program 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 General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
|
|
* USA
|
|
*
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/hardirq.h>
|
|
#include <linux/types.h>
|
|
#include <linux/crypto.h>
|
|
#include <linux/err.h>
|
|
#include <crypto/algapi.h>
|
|
#include <crypto/twofish.h>
|
|
#include <crypto/cryptd.h>
|
|
#include <crypto/b128ops.h>
|
|
#include <crypto/ctr.h>
|
|
#include <crypto/lrw.h>
|
|
#include <crypto/xts.h>
|
|
#include <asm/i387.h>
|
|
#include <asm/xcr.h>
|
|
#include <asm/xsave.h>
|
|
#include <asm/crypto/twofish.h>
|
|
#include <asm/crypto/ablk_helper.h>
|
|
#include <asm/crypto/glue_helper.h>
|
|
#include <crypto/scatterwalk.h>
|
|
#include <linux/workqueue.h>
|
|
#include <linux/spinlock.h>
|
|
|
|
#define TWOFISH_PARALLEL_BLOCKS 8
|
|
|
|
static inline void twofish_enc_blk_3way(struct twofish_ctx *ctx, u8 *dst,
|
|
const u8 *src)
|
|
{
|
|
__twofish_enc_blk_3way(ctx, dst, src, false);
|
|
}
|
|
|
|
/* 8-way parallel cipher functions */
|
|
asmlinkage void __twofish_enc_blk_8way(struct twofish_ctx *ctx, u8 *dst,
|
|
const u8 *src, bool xor);
|
|
asmlinkage void twofish_dec_blk_8way(struct twofish_ctx *ctx, u8 *dst,
|
|
const u8 *src);
|
|
|
|
static inline void twofish_enc_blk_xway(struct twofish_ctx *ctx, u8 *dst,
|
|
const u8 *src)
|
|
{
|
|
__twofish_enc_blk_8way(ctx, dst, src, false);
|
|
}
|
|
|
|
static inline void twofish_enc_blk_xway_xor(struct twofish_ctx *ctx, u8 *dst,
|
|
const u8 *src)
|
|
{
|
|
__twofish_enc_blk_8way(ctx, dst, src, true);
|
|
}
|
|
|
|
static inline void twofish_dec_blk_xway(struct twofish_ctx *ctx, u8 *dst,
|
|
const u8 *src)
|
|
{
|
|
twofish_dec_blk_8way(ctx, dst, src);
|
|
}
|
|
|
|
static void twofish_dec_blk_cbc_xway(void *ctx, u128 *dst, const u128 *src)
|
|
{
|
|
u128 ivs[TWOFISH_PARALLEL_BLOCKS - 1];
|
|
unsigned int j;
|
|
|
|
for (j = 0; j < TWOFISH_PARALLEL_BLOCKS - 1; j++)
|
|
ivs[j] = src[j];
|
|
|
|
twofish_dec_blk_xway(ctx, (u8 *)dst, (u8 *)src);
|
|
|
|
for (j = 0; j < TWOFISH_PARALLEL_BLOCKS - 1; j++)
|
|
u128_xor(dst + (j + 1), dst + (j + 1), ivs + j);
|
|
}
|
|
|
|
static void twofish_enc_blk_ctr_xway(void *ctx, u128 *dst, const u128 *src,
|
|
u128 *iv)
|
|
{
|
|
be128 ctrblks[TWOFISH_PARALLEL_BLOCKS];
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < TWOFISH_PARALLEL_BLOCKS; i++) {
|
|
if (dst != src)
|
|
dst[i] = src[i];
|
|
|
|
u128_to_be128(&ctrblks[i], iv);
|
|
u128_inc(iv);
|
|
}
|
|
|
|
twofish_enc_blk_xway_xor(ctx, (u8 *)dst, (u8 *)ctrblks);
|
|
}
|
|
|
|
static const struct common_glue_ctx twofish_enc = {
|
|
.num_funcs = 3,
|
|
.fpu_blocks_limit = TWOFISH_PARALLEL_BLOCKS,
|
|
|
|
.funcs = { {
|
|
.num_blocks = TWOFISH_PARALLEL_BLOCKS,
|
|
.fn_u = { .ecb = GLUE_FUNC_CAST(twofish_enc_blk_xway) }
|
|
}, {
|
|
.num_blocks = 3,
|
|
.fn_u = { .ecb = GLUE_FUNC_CAST(twofish_enc_blk_3way) }
|
|
}, {
|
|
.num_blocks = 1,
|
|
.fn_u = { .ecb = GLUE_FUNC_CAST(twofish_enc_blk) }
|
|
} }
|
|
};
|
|
|
|
static const struct common_glue_ctx twofish_ctr = {
|
|
.num_funcs = 3,
|
|
.fpu_blocks_limit = TWOFISH_PARALLEL_BLOCKS,
|
|
|
|
.funcs = { {
|
|
.num_blocks = TWOFISH_PARALLEL_BLOCKS,
|
|
.fn_u = { .ctr = GLUE_CTR_FUNC_CAST(twofish_enc_blk_ctr_xway) }
|
|
}, {
|
|
.num_blocks = 3,
|
|
.fn_u = { .ctr = GLUE_CTR_FUNC_CAST(twofish_enc_blk_ctr_3way) }
|
|
}, {
|
|
.num_blocks = 1,
|
|
.fn_u = { .ctr = GLUE_CTR_FUNC_CAST(twofish_enc_blk_ctr) }
|
|
} }
|
|
};
|
|
|
|
static const struct common_glue_ctx twofish_dec = {
|
|
.num_funcs = 3,
|
|
.fpu_blocks_limit = TWOFISH_PARALLEL_BLOCKS,
|
|
|
|
.funcs = { {
|
|
.num_blocks = TWOFISH_PARALLEL_BLOCKS,
|
|
.fn_u = { .ecb = GLUE_FUNC_CAST(twofish_dec_blk_xway) }
|
|
}, {
|
|
.num_blocks = 3,
|
|
.fn_u = { .ecb = GLUE_FUNC_CAST(twofish_dec_blk_3way) }
|
|
}, {
|
|
.num_blocks = 1,
|
|
.fn_u = { .ecb = GLUE_FUNC_CAST(twofish_dec_blk) }
|
|
} }
|
|
};
|
|
|
|
static const struct common_glue_ctx twofish_dec_cbc = {
|
|
.num_funcs = 3,
|
|
.fpu_blocks_limit = TWOFISH_PARALLEL_BLOCKS,
|
|
|
|
.funcs = { {
|
|
.num_blocks = TWOFISH_PARALLEL_BLOCKS,
|
|
.fn_u = { .cbc = GLUE_CBC_FUNC_CAST(twofish_dec_blk_cbc_xway) }
|
|
}, {
|
|
.num_blocks = 3,
|
|
.fn_u = { .cbc = GLUE_CBC_FUNC_CAST(twofish_dec_blk_cbc_3way) }
|
|
}, {
|
|
.num_blocks = 1,
|
|
.fn_u = { .cbc = GLUE_CBC_FUNC_CAST(twofish_dec_blk) }
|
|
} }
|
|
};
|
|
|
|
static int ecb_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
|
|
struct scatterlist *src, unsigned int nbytes)
|
|
{
|
|
return glue_ecb_crypt_128bit(&twofish_enc, desc, dst, src, nbytes);
|
|
}
|
|
|
|
static int ecb_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
|
|
struct scatterlist *src, unsigned int nbytes)
|
|
{
|
|
return glue_ecb_crypt_128bit(&twofish_dec, desc, dst, src, nbytes);
|
|
}
|
|
|
|
static int cbc_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
|
|
struct scatterlist *src, unsigned int nbytes)
|
|
{
|
|
return glue_cbc_encrypt_128bit(GLUE_FUNC_CAST(twofish_enc_blk), desc,
|
|
dst, src, nbytes);
|
|
}
|
|
|
|
static int cbc_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
|
|
struct scatterlist *src, unsigned int nbytes)
|
|
{
|
|
return glue_cbc_decrypt_128bit(&twofish_dec_cbc, desc, dst, src,
|
|
nbytes);
|
|
}
|
|
|
|
static int ctr_crypt(struct blkcipher_desc *desc, struct scatterlist *dst,
|
|
struct scatterlist *src, unsigned int nbytes)
|
|
{
|
|
return glue_ctr_crypt_128bit(&twofish_ctr, desc, dst, src, nbytes);
|
|
}
|
|
|
|
static inline bool twofish_fpu_begin(bool fpu_enabled, unsigned int nbytes)
|
|
{
|
|
return glue_fpu_begin(TF_BLOCK_SIZE, TWOFISH_PARALLEL_BLOCKS, NULL,
|
|
fpu_enabled, nbytes);
|
|
}
|
|
|
|
static inline void twofish_fpu_end(bool fpu_enabled)
|
|
{
|
|
glue_fpu_end(fpu_enabled);
|
|
}
|
|
|
|
struct crypt_priv {
|
|
struct twofish_ctx *ctx;
|
|
bool fpu_enabled;
|
|
};
|
|
|
|
static void encrypt_callback(void *priv, u8 *srcdst, unsigned int nbytes)
|
|
{
|
|
const unsigned int bsize = TF_BLOCK_SIZE;
|
|
struct crypt_priv *ctx = priv;
|
|
int i;
|
|
|
|
ctx->fpu_enabled = twofish_fpu_begin(ctx->fpu_enabled, nbytes);
|
|
|
|
if (nbytes == bsize * TWOFISH_PARALLEL_BLOCKS) {
|
|
twofish_enc_blk_xway(ctx->ctx, srcdst, srcdst);
|
|
return;
|
|
}
|
|
|
|
for (i = 0; i < nbytes / (bsize * 3); i++, srcdst += bsize * 3)
|
|
twofish_enc_blk_3way(ctx->ctx, srcdst, srcdst);
|
|
|
|
nbytes %= bsize * 3;
|
|
|
|
for (i = 0; i < nbytes / bsize; i++, srcdst += bsize)
|
|
twofish_enc_blk(ctx->ctx, srcdst, srcdst);
|
|
}
|
|
|
|
static void decrypt_callback(void *priv, u8 *srcdst, unsigned int nbytes)
|
|
{
|
|
const unsigned int bsize = TF_BLOCK_SIZE;
|
|
struct crypt_priv *ctx = priv;
|
|
int i;
|
|
|
|
ctx->fpu_enabled = twofish_fpu_begin(ctx->fpu_enabled, nbytes);
|
|
|
|
if (nbytes == bsize * TWOFISH_PARALLEL_BLOCKS) {
|
|
twofish_dec_blk_xway(ctx->ctx, srcdst, srcdst);
|
|
return;
|
|
}
|
|
|
|
for (i = 0; i < nbytes / (bsize * 3); i++, srcdst += bsize * 3)
|
|
twofish_dec_blk_3way(ctx->ctx, srcdst, srcdst);
|
|
|
|
nbytes %= bsize * 3;
|
|
|
|
for (i = 0; i < nbytes / bsize; i++, srcdst += bsize)
|
|
twofish_dec_blk(ctx->ctx, srcdst, srcdst);
|
|
}
|
|
|
|
static int lrw_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
|
|
struct scatterlist *src, unsigned int nbytes)
|
|
{
|
|
struct twofish_lrw_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
|
|
be128 buf[TWOFISH_PARALLEL_BLOCKS];
|
|
struct crypt_priv crypt_ctx = {
|
|
.ctx = &ctx->twofish_ctx,
|
|
.fpu_enabled = false,
|
|
};
|
|
struct lrw_crypt_req req = {
|
|
.tbuf = buf,
|
|
.tbuflen = sizeof(buf),
|
|
|
|
.table_ctx = &ctx->lrw_table,
|
|
.crypt_ctx = &crypt_ctx,
|
|
.crypt_fn = encrypt_callback,
|
|
};
|
|
int ret;
|
|
|
|
desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
|
|
ret = lrw_crypt(desc, dst, src, nbytes, &req);
|
|
twofish_fpu_end(crypt_ctx.fpu_enabled);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int lrw_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
|
|
struct scatterlist *src, unsigned int nbytes)
|
|
{
|
|
struct twofish_lrw_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
|
|
be128 buf[TWOFISH_PARALLEL_BLOCKS];
|
|
struct crypt_priv crypt_ctx = {
|
|
.ctx = &ctx->twofish_ctx,
|
|
.fpu_enabled = false,
|
|
};
|
|
struct lrw_crypt_req req = {
|
|
.tbuf = buf,
|
|
.tbuflen = sizeof(buf),
|
|
|
|
.table_ctx = &ctx->lrw_table,
|
|
.crypt_ctx = &crypt_ctx,
|
|
.crypt_fn = decrypt_callback,
|
|
};
|
|
int ret;
|
|
|
|
desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
|
|
ret = lrw_crypt(desc, dst, src, nbytes, &req);
|
|
twofish_fpu_end(crypt_ctx.fpu_enabled);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int xts_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
|
|
struct scatterlist *src, unsigned int nbytes)
|
|
{
|
|
struct twofish_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
|
|
be128 buf[TWOFISH_PARALLEL_BLOCKS];
|
|
struct crypt_priv crypt_ctx = {
|
|
.ctx = &ctx->crypt_ctx,
|
|
.fpu_enabled = false,
|
|
};
|
|
struct xts_crypt_req req = {
|
|
.tbuf = buf,
|
|
.tbuflen = sizeof(buf),
|
|
|
|
.tweak_ctx = &ctx->tweak_ctx,
|
|
.tweak_fn = XTS_TWEAK_CAST(twofish_enc_blk),
|
|
.crypt_ctx = &crypt_ctx,
|
|
.crypt_fn = encrypt_callback,
|
|
};
|
|
int ret;
|
|
|
|
desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
|
|
ret = xts_crypt(desc, dst, src, nbytes, &req);
|
|
twofish_fpu_end(crypt_ctx.fpu_enabled);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int xts_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
|
|
struct scatterlist *src, unsigned int nbytes)
|
|
{
|
|
struct twofish_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
|
|
be128 buf[TWOFISH_PARALLEL_BLOCKS];
|
|
struct crypt_priv crypt_ctx = {
|
|
.ctx = &ctx->crypt_ctx,
|
|
.fpu_enabled = false,
|
|
};
|
|
struct xts_crypt_req req = {
|
|
.tbuf = buf,
|
|
.tbuflen = sizeof(buf),
|
|
|
|
.tweak_ctx = &ctx->tweak_ctx,
|
|
.tweak_fn = XTS_TWEAK_CAST(twofish_enc_blk),
|
|
.crypt_ctx = &crypt_ctx,
|
|
.crypt_fn = decrypt_callback,
|
|
};
|
|
int ret;
|
|
|
|
desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
|
|
ret = xts_crypt(desc, dst, src, nbytes, &req);
|
|
twofish_fpu_end(crypt_ctx.fpu_enabled);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static struct crypto_alg twofish_algs[10] = { {
|
|
.cra_name = "__ecb-twofish-avx",
|
|
.cra_driver_name = "__driver-ecb-twofish-avx",
|
|
.cra_priority = 0,
|
|
.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
|
|
.cra_blocksize = TF_BLOCK_SIZE,
|
|
.cra_ctxsize = sizeof(struct twofish_ctx),
|
|
.cra_alignmask = 0,
|
|
.cra_type = &crypto_blkcipher_type,
|
|
.cra_module = THIS_MODULE,
|
|
.cra_u = {
|
|
.blkcipher = {
|
|
.min_keysize = TF_MIN_KEY_SIZE,
|
|
.max_keysize = TF_MAX_KEY_SIZE,
|
|
.setkey = twofish_setkey,
|
|
.encrypt = ecb_encrypt,
|
|
.decrypt = ecb_decrypt,
|
|
},
|
|
},
|
|
}, {
|
|
.cra_name = "__cbc-twofish-avx",
|
|
.cra_driver_name = "__driver-cbc-twofish-avx",
|
|
.cra_priority = 0,
|
|
.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
|
|
.cra_blocksize = TF_BLOCK_SIZE,
|
|
.cra_ctxsize = sizeof(struct twofish_ctx),
|
|
.cra_alignmask = 0,
|
|
.cra_type = &crypto_blkcipher_type,
|
|
.cra_module = THIS_MODULE,
|
|
.cra_u = {
|
|
.blkcipher = {
|
|
.min_keysize = TF_MIN_KEY_SIZE,
|
|
.max_keysize = TF_MAX_KEY_SIZE,
|
|
.setkey = twofish_setkey,
|
|
.encrypt = cbc_encrypt,
|
|
.decrypt = cbc_decrypt,
|
|
},
|
|
},
|
|
}, {
|
|
.cra_name = "__ctr-twofish-avx",
|
|
.cra_driver_name = "__driver-ctr-twofish-avx",
|
|
.cra_priority = 0,
|
|
.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
|
|
.cra_blocksize = 1,
|
|
.cra_ctxsize = sizeof(struct twofish_ctx),
|
|
.cra_alignmask = 0,
|
|
.cra_type = &crypto_blkcipher_type,
|
|
.cra_module = THIS_MODULE,
|
|
.cra_u = {
|
|
.blkcipher = {
|
|
.min_keysize = TF_MIN_KEY_SIZE,
|
|
.max_keysize = TF_MAX_KEY_SIZE,
|
|
.ivsize = TF_BLOCK_SIZE,
|
|
.setkey = twofish_setkey,
|
|
.encrypt = ctr_crypt,
|
|
.decrypt = ctr_crypt,
|
|
},
|
|
},
|
|
}, {
|
|
.cra_name = "__lrw-twofish-avx",
|
|
.cra_driver_name = "__driver-lrw-twofish-avx",
|
|
.cra_priority = 0,
|
|
.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
|
|
.cra_blocksize = TF_BLOCK_SIZE,
|
|
.cra_ctxsize = sizeof(struct twofish_lrw_ctx),
|
|
.cra_alignmask = 0,
|
|
.cra_type = &crypto_blkcipher_type,
|
|
.cra_module = THIS_MODULE,
|
|
.cra_exit = lrw_twofish_exit_tfm,
|
|
.cra_u = {
|
|
.blkcipher = {
|
|
.min_keysize = TF_MIN_KEY_SIZE +
|
|
TF_BLOCK_SIZE,
|
|
.max_keysize = TF_MAX_KEY_SIZE +
|
|
TF_BLOCK_SIZE,
|
|
.ivsize = TF_BLOCK_SIZE,
|
|
.setkey = lrw_twofish_setkey,
|
|
.encrypt = lrw_encrypt,
|
|
.decrypt = lrw_decrypt,
|
|
},
|
|
},
|
|
}, {
|
|
.cra_name = "__xts-twofish-avx",
|
|
.cra_driver_name = "__driver-xts-twofish-avx",
|
|
.cra_priority = 0,
|
|
.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
|
|
.cra_blocksize = TF_BLOCK_SIZE,
|
|
.cra_ctxsize = sizeof(struct twofish_xts_ctx),
|
|
.cra_alignmask = 0,
|
|
.cra_type = &crypto_blkcipher_type,
|
|
.cra_module = THIS_MODULE,
|
|
.cra_u = {
|
|
.blkcipher = {
|
|
.min_keysize = TF_MIN_KEY_SIZE * 2,
|
|
.max_keysize = TF_MAX_KEY_SIZE * 2,
|
|
.ivsize = TF_BLOCK_SIZE,
|
|
.setkey = xts_twofish_setkey,
|
|
.encrypt = xts_encrypt,
|
|
.decrypt = xts_decrypt,
|
|
},
|
|
},
|
|
}, {
|
|
.cra_name = "ecb(twofish)",
|
|
.cra_driver_name = "ecb-twofish-avx",
|
|
.cra_priority = 400,
|
|
.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
|
|
.cra_blocksize = TF_BLOCK_SIZE,
|
|
.cra_ctxsize = sizeof(struct async_helper_ctx),
|
|
.cra_alignmask = 0,
|
|
.cra_type = &crypto_ablkcipher_type,
|
|
.cra_module = THIS_MODULE,
|
|
.cra_init = ablk_init,
|
|
.cra_exit = ablk_exit,
|
|
.cra_u = {
|
|
.ablkcipher = {
|
|
.min_keysize = TF_MIN_KEY_SIZE,
|
|
.max_keysize = TF_MAX_KEY_SIZE,
|
|
.setkey = ablk_set_key,
|
|
.encrypt = ablk_encrypt,
|
|
.decrypt = ablk_decrypt,
|
|
},
|
|
},
|
|
}, {
|
|
.cra_name = "cbc(twofish)",
|
|
.cra_driver_name = "cbc-twofish-avx",
|
|
.cra_priority = 400,
|
|
.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
|
|
.cra_blocksize = TF_BLOCK_SIZE,
|
|
.cra_ctxsize = sizeof(struct async_helper_ctx),
|
|
.cra_alignmask = 0,
|
|
.cra_type = &crypto_ablkcipher_type,
|
|
.cra_module = THIS_MODULE,
|
|
.cra_init = ablk_init,
|
|
.cra_exit = ablk_exit,
|
|
.cra_u = {
|
|
.ablkcipher = {
|
|
.min_keysize = TF_MIN_KEY_SIZE,
|
|
.max_keysize = TF_MAX_KEY_SIZE,
|
|
.ivsize = TF_BLOCK_SIZE,
|
|
.setkey = ablk_set_key,
|
|
.encrypt = __ablk_encrypt,
|
|
.decrypt = ablk_decrypt,
|
|
},
|
|
},
|
|
}, {
|
|
.cra_name = "ctr(twofish)",
|
|
.cra_driver_name = "ctr-twofish-avx",
|
|
.cra_priority = 400,
|
|
.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
|
|
.cra_blocksize = 1,
|
|
.cra_ctxsize = sizeof(struct async_helper_ctx),
|
|
.cra_alignmask = 0,
|
|
.cra_type = &crypto_ablkcipher_type,
|
|
.cra_module = THIS_MODULE,
|
|
.cra_init = ablk_init,
|
|
.cra_exit = ablk_exit,
|
|
.cra_u = {
|
|
.ablkcipher = {
|
|
.min_keysize = TF_MIN_KEY_SIZE,
|
|
.max_keysize = TF_MAX_KEY_SIZE,
|
|
.ivsize = TF_BLOCK_SIZE,
|
|
.setkey = ablk_set_key,
|
|
.encrypt = ablk_encrypt,
|
|
.decrypt = ablk_encrypt,
|
|
.geniv = "chainiv",
|
|
},
|
|
},
|
|
}, {
|
|
.cra_name = "lrw(twofish)",
|
|
.cra_driver_name = "lrw-twofish-avx",
|
|
.cra_priority = 400,
|
|
.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
|
|
.cra_blocksize = TF_BLOCK_SIZE,
|
|
.cra_ctxsize = sizeof(struct async_helper_ctx),
|
|
.cra_alignmask = 0,
|
|
.cra_type = &crypto_ablkcipher_type,
|
|
.cra_module = THIS_MODULE,
|
|
.cra_init = ablk_init,
|
|
.cra_exit = ablk_exit,
|
|
.cra_u = {
|
|
.ablkcipher = {
|
|
.min_keysize = TF_MIN_KEY_SIZE +
|
|
TF_BLOCK_SIZE,
|
|
.max_keysize = TF_MAX_KEY_SIZE +
|
|
TF_BLOCK_SIZE,
|
|
.ivsize = TF_BLOCK_SIZE,
|
|
.setkey = ablk_set_key,
|
|
.encrypt = ablk_encrypt,
|
|
.decrypt = ablk_decrypt,
|
|
},
|
|
},
|
|
}, {
|
|
.cra_name = "xts(twofish)",
|
|
.cra_driver_name = "xts-twofish-avx",
|
|
.cra_priority = 400,
|
|
.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
|
|
.cra_blocksize = TF_BLOCK_SIZE,
|
|
.cra_ctxsize = sizeof(struct async_helper_ctx),
|
|
.cra_alignmask = 0,
|
|
.cra_type = &crypto_ablkcipher_type,
|
|
.cra_module = THIS_MODULE,
|
|
.cra_init = ablk_init,
|
|
.cra_exit = ablk_exit,
|
|
.cra_u = {
|
|
.ablkcipher = {
|
|
.min_keysize = TF_MIN_KEY_SIZE * 2,
|
|
.max_keysize = TF_MAX_KEY_SIZE * 2,
|
|
.ivsize = TF_BLOCK_SIZE,
|
|
.setkey = ablk_set_key,
|
|
.encrypt = ablk_encrypt,
|
|
.decrypt = ablk_decrypt,
|
|
},
|
|
},
|
|
} };
|
|
|
|
static int __init twofish_init(void)
|
|
{
|
|
u64 xcr0;
|
|
|
|
if (!cpu_has_avx || !cpu_has_osxsave) {
|
|
printk(KERN_INFO "AVX instructions are not detected.\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
xcr0 = xgetbv(XCR_XFEATURE_ENABLED_MASK);
|
|
if ((xcr0 & (XSTATE_SSE | XSTATE_YMM)) != (XSTATE_SSE | XSTATE_YMM)) {
|
|
printk(KERN_INFO "AVX detected but unusable.\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
return crypto_register_algs(twofish_algs, ARRAY_SIZE(twofish_algs));
|
|
}
|
|
|
|
static void __exit twofish_exit(void)
|
|
{
|
|
crypto_unregister_algs(twofish_algs, ARRAY_SIZE(twofish_algs));
|
|
}
|
|
|
|
module_init(twofish_init);
|
|
module_exit(twofish_exit);
|
|
|
|
MODULE_DESCRIPTION("Twofish Cipher Algorithm, AVX optimized");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("twofish");
|