610 lines
16 KiB
C
610 lines
16 KiB
C
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/*
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* Glue Code for the AVX assembler implemention of the Cast6 Cipher
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*
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* Copyright (C) 2012 Johannes Goetzfried
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* <Johannes.Goetzfried@informatik.stud.uni-erlangen.de>
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*
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* Copyright © 2013 Jussi Kivilinna <jussi.kivilinna@iki.fi>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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* USA
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*
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*/
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#include <linux/module.h>
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#include <linux/hardirq.h>
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#include <linux/types.h>
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#include <linux/crypto.h>
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#include <linux/err.h>
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#include <crypto/ablk_helper.h>
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#include <crypto/algapi.h>
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#include <crypto/cast6.h>
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#include <crypto/cryptd.h>
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#include <crypto/b128ops.h>
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#include <crypto/ctr.h>
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#include <crypto/lrw.h>
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#include <crypto/xts.h>
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#include <asm/fpu/api.h>
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#include <asm/crypto/glue_helper.h>
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#define CAST6_PARALLEL_BLOCKS 8
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asmlinkage void cast6_ecb_enc_8way(struct cast6_ctx *ctx, u8 *dst,
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const u8 *src);
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asmlinkage void cast6_ecb_dec_8way(struct cast6_ctx *ctx, u8 *dst,
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const u8 *src);
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asmlinkage void cast6_cbc_dec_8way(struct cast6_ctx *ctx, u8 *dst,
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const u8 *src);
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asmlinkage void cast6_ctr_8way(struct cast6_ctx *ctx, u8 *dst, const u8 *src,
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le128 *iv);
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asmlinkage void cast6_xts_enc_8way(struct cast6_ctx *ctx, u8 *dst,
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const u8 *src, le128 *iv);
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asmlinkage void cast6_xts_dec_8way(struct cast6_ctx *ctx, u8 *dst,
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const u8 *src, le128 *iv);
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static void cast6_xts_enc(void *ctx, u128 *dst, const u128 *src, le128 *iv)
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{
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glue_xts_crypt_128bit_one(ctx, dst, src, iv,
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GLUE_FUNC_CAST(__cast6_encrypt));
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}
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static void cast6_xts_dec(void *ctx, u128 *dst, const u128 *src, le128 *iv)
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{
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glue_xts_crypt_128bit_one(ctx, dst, src, iv,
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GLUE_FUNC_CAST(__cast6_decrypt));
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}
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static void cast6_crypt_ctr(void *ctx, u128 *dst, const u128 *src, le128 *iv)
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{
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be128 ctrblk;
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le128_to_be128(&ctrblk, iv);
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le128_inc(iv);
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__cast6_encrypt(ctx, (u8 *)&ctrblk, (u8 *)&ctrblk);
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u128_xor(dst, src, (u128 *)&ctrblk);
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}
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static const struct common_glue_ctx cast6_enc = {
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.num_funcs = 2,
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.fpu_blocks_limit = CAST6_PARALLEL_BLOCKS,
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.funcs = { {
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.num_blocks = CAST6_PARALLEL_BLOCKS,
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.fn_u = { .ecb = GLUE_FUNC_CAST(cast6_ecb_enc_8way) }
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}, {
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.num_blocks = 1,
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.fn_u = { .ecb = GLUE_FUNC_CAST(__cast6_encrypt) }
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} }
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};
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static const struct common_glue_ctx cast6_ctr = {
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.num_funcs = 2,
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.fpu_blocks_limit = CAST6_PARALLEL_BLOCKS,
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.funcs = { {
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.num_blocks = CAST6_PARALLEL_BLOCKS,
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.fn_u = { .ctr = GLUE_CTR_FUNC_CAST(cast6_ctr_8way) }
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}, {
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.num_blocks = 1,
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.fn_u = { .ctr = GLUE_CTR_FUNC_CAST(cast6_crypt_ctr) }
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} }
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};
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static const struct common_glue_ctx cast6_enc_xts = {
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.num_funcs = 2,
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.fpu_blocks_limit = CAST6_PARALLEL_BLOCKS,
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.funcs = { {
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.num_blocks = CAST6_PARALLEL_BLOCKS,
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.fn_u = { .xts = GLUE_XTS_FUNC_CAST(cast6_xts_enc_8way) }
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}, {
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.num_blocks = 1,
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.fn_u = { .xts = GLUE_XTS_FUNC_CAST(cast6_xts_enc) }
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} }
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};
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static const struct common_glue_ctx cast6_dec = {
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.num_funcs = 2,
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.fpu_blocks_limit = CAST6_PARALLEL_BLOCKS,
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.funcs = { {
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.num_blocks = CAST6_PARALLEL_BLOCKS,
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.fn_u = { .ecb = GLUE_FUNC_CAST(cast6_ecb_dec_8way) }
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}, {
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.num_blocks = 1,
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.fn_u = { .ecb = GLUE_FUNC_CAST(__cast6_decrypt) }
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} }
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};
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static const struct common_glue_ctx cast6_dec_cbc = {
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.num_funcs = 2,
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.fpu_blocks_limit = CAST6_PARALLEL_BLOCKS,
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.funcs = { {
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.num_blocks = CAST6_PARALLEL_BLOCKS,
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.fn_u = { .cbc = GLUE_CBC_FUNC_CAST(cast6_cbc_dec_8way) }
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}, {
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.num_blocks = 1,
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.fn_u = { .cbc = GLUE_CBC_FUNC_CAST(__cast6_decrypt) }
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} }
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};
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static const struct common_glue_ctx cast6_dec_xts = {
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.num_funcs = 2,
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.fpu_blocks_limit = CAST6_PARALLEL_BLOCKS,
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.funcs = { {
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.num_blocks = CAST6_PARALLEL_BLOCKS,
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.fn_u = { .xts = GLUE_XTS_FUNC_CAST(cast6_xts_dec_8way) }
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}, {
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.num_blocks = 1,
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.fn_u = { .xts = GLUE_XTS_FUNC_CAST(cast6_xts_dec) }
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} }
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};
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static int ecb_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
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struct scatterlist *src, unsigned int nbytes)
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{
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return glue_ecb_crypt_128bit(&cast6_enc, desc, dst, src, nbytes);
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}
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static int ecb_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
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struct scatterlist *src, unsigned int nbytes)
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{
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return glue_ecb_crypt_128bit(&cast6_dec, desc, dst, src, nbytes);
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}
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static int cbc_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
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struct scatterlist *src, unsigned int nbytes)
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{
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return glue_cbc_encrypt_128bit(GLUE_FUNC_CAST(__cast6_encrypt), desc,
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dst, src, nbytes);
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}
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static int cbc_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
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struct scatterlist *src, unsigned int nbytes)
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{
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return glue_cbc_decrypt_128bit(&cast6_dec_cbc, desc, dst, src,
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nbytes);
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}
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static int ctr_crypt(struct blkcipher_desc *desc, struct scatterlist *dst,
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struct scatterlist *src, unsigned int nbytes)
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{
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return glue_ctr_crypt_128bit(&cast6_ctr, desc, dst, src, nbytes);
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}
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static inline bool cast6_fpu_begin(bool fpu_enabled, unsigned int nbytes)
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{
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return glue_fpu_begin(CAST6_BLOCK_SIZE, CAST6_PARALLEL_BLOCKS,
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NULL, fpu_enabled, nbytes);
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}
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static inline void cast6_fpu_end(bool fpu_enabled)
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{
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glue_fpu_end(fpu_enabled);
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}
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struct crypt_priv {
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struct cast6_ctx *ctx;
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bool fpu_enabled;
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};
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static void encrypt_callback(void *priv, u8 *srcdst, unsigned int nbytes)
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{
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const unsigned int bsize = CAST6_BLOCK_SIZE;
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struct crypt_priv *ctx = priv;
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int i;
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ctx->fpu_enabled = cast6_fpu_begin(ctx->fpu_enabled, nbytes);
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if (nbytes == bsize * CAST6_PARALLEL_BLOCKS) {
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cast6_ecb_enc_8way(ctx->ctx, srcdst, srcdst);
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return;
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}
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for (i = 0; i < nbytes / bsize; i++, srcdst += bsize)
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__cast6_encrypt(ctx->ctx, srcdst, srcdst);
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}
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static void decrypt_callback(void *priv, u8 *srcdst, unsigned int nbytes)
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{
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const unsigned int bsize = CAST6_BLOCK_SIZE;
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struct crypt_priv *ctx = priv;
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int i;
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ctx->fpu_enabled = cast6_fpu_begin(ctx->fpu_enabled, nbytes);
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if (nbytes == bsize * CAST6_PARALLEL_BLOCKS) {
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cast6_ecb_dec_8way(ctx->ctx, srcdst, srcdst);
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return;
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}
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for (i = 0; i < nbytes / bsize; i++, srcdst += bsize)
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__cast6_decrypt(ctx->ctx, srcdst, srcdst);
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}
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struct cast6_lrw_ctx {
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struct lrw_table_ctx lrw_table;
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struct cast6_ctx cast6_ctx;
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};
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static int lrw_cast6_setkey(struct crypto_tfm *tfm, const u8 *key,
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unsigned int keylen)
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{
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struct cast6_lrw_ctx *ctx = crypto_tfm_ctx(tfm);
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int err;
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err = __cast6_setkey(&ctx->cast6_ctx, key, keylen - CAST6_BLOCK_SIZE,
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&tfm->crt_flags);
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if (err)
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return err;
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return lrw_init_table(&ctx->lrw_table, key + keylen - CAST6_BLOCK_SIZE);
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}
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static int lrw_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
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struct scatterlist *src, unsigned int nbytes)
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{
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struct cast6_lrw_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
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be128 buf[CAST6_PARALLEL_BLOCKS];
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struct crypt_priv crypt_ctx = {
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.ctx = &ctx->cast6_ctx,
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.fpu_enabled = false,
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};
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struct lrw_crypt_req req = {
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.tbuf = buf,
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.tbuflen = sizeof(buf),
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.table_ctx = &ctx->lrw_table,
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.crypt_ctx = &crypt_ctx,
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.crypt_fn = encrypt_callback,
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};
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int ret;
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desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
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ret = lrw_crypt(desc, dst, src, nbytes, &req);
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cast6_fpu_end(crypt_ctx.fpu_enabled);
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return ret;
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}
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static int lrw_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
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struct scatterlist *src, unsigned int nbytes)
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{
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struct cast6_lrw_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
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be128 buf[CAST6_PARALLEL_BLOCKS];
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struct crypt_priv crypt_ctx = {
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.ctx = &ctx->cast6_ctx,
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.fpu_enabled = false,
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};
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struct lrw_crypt_req req = {
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.tbuf = buf,
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.tbuflen = sizeof(buf),
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.table_ctx = &ctx->lrw_table,
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.crypt_ctx = &crypt_ctx,
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.crypt_fn = decrypt_callback,
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};
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int ret;
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desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
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ret = lrw_crypt(desc, dst, src, nbytes, &req);
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cast6_fpu_end(crypt_ctx.fpu_enabled);
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return ret;
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}
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static void lrw_exit_tfm(struct crypto_tfm *tfm)
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{
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struct cast6_lrw_ctx *ctx = crypto_tfm_ctx(tfm);
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lrw_free_table(&ctx->lrw_table);
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}
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struct cast6_xts_ctx {
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struct cast6_ctx tweak_ctx;
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struct cast6_ctx crypt_ctx;
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};
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static int xts_cast6_setkey(struct crypto_tfm *tfm, const u8 *key,
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unsigned int keylen)
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{
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struct cast6_xts_ctx *ctx = crypto_tfm_ctx(tfm);
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u32 *flags = &tfm->crt_flags;
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int err;
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err = xts_check_key(tfm, key, keylen);
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if (err)
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return err;
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/* first half of xts-key is for crypt */
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err = __cast6_setkey(&ctx->crypt_ctx, key, keylen / 2, flags);
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if (err)
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return err;
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/* second half of xts-key is for tweak */
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return __cast6_setkey(&ctx->tweak_ctx, key + keylen / 2, keylen / 2,
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flags);
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}
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static int xts_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
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struct scatterlist *src, unsigned int nbytes)
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{
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struct cast6_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
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|
|
return glue_xts_crypt_128bit(&cast6_enc_xts, desc, dst, src, nbytes,
|
||
|
|
XTS_TWEAK_CAST(__cast6_encrypt),
|
||
|
|
&ctx->tweak_ctx, &ctx->crypt_ctx);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int xts_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
|
||
|
|
struct scatterlist *src, unsigned int nbytes)
|
||
|
|
{
|
||
|
|
struct cast6_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
|
||
|
|
|
||
|
|
return glue_xts_crypt_128bit(&cast6_dec_xts, desc, dst, src, nbytes,
|
||
|
|
XTS_TWEAK_CAST(__cast6_encrypt),
|
||
|
|
&ctx->tweak_ctx, &ctx->crypt_ctx);
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct crypto_alg cast6_algs[10] = { {
|
||
|
|
.cra_name = "__ecb-cast6-avx",
|
||
|
|
.cra_driver_name = "__driver-ecb-cast6-avx",
|
||
|
|
.cra_priority = 0,
|
||
|
|
.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER |
|
||
|
|
CRYPTO_ALG_INTERNAL,
|
||
|
|
.cra_blocksize = CAST6_BLOCK_SIZE,
|
||
|
|
.cra_ctxsize = sizeof(struct cast6_ctx),
|
||
|
|
.cra_alignmask = 0,
|
||
|
|
.cra_type = &crypto_blkcipher_type,
|
||
|
|
.cra_module = THIS_MODULE,
|
||
|
|
.cra_u = {
|
||
|
|
.blkcipher = {
|
||
|
|
.min_keysize = CAST6_MIN_KEY_SIZE,
|
||
|
|
.max_keysize = CAST6_MAX_KEY_SIZE,
|
||
|
|
.setkey = cast6_setkey,
|
||
|
|
.encrypt = ecb_encrypt,
|
||
|
|
.decrypt = ecb_decrypt,
|
||
|
|
},
|
||
|
|
},
|
||
|
|
}, {
|
||
|
|
.cra_name = "__cbc-cast6-avx",
|
||
|
|
.cra_driver_name = "__driver-cbc-cast6-avx",
|
||
|
|
.cra_priority = 0,
|
||
|
|
.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER |
|
||
|
|
CRYPTO_ALG_INTERNAL,
|
||
|
|
.cra_blocksize = CAST6_BLOCK_SIZE,
|
||
|
|
.cra_ctxsize = sizeof(struct cast6_ctx),
|
||
|
|
.cra_alignmask = 0,
|
||
|
|
.cra_type = &crypto_blkcipher_type,
|
||
|
|
.cra_module = THIS_MODULE,
|
||
|
|
.cra_u = {
|
||
|
|
.blkcipher = {
|
||
|
|
.min_keysize = CAST6_MIN_KEY_SIZE,
|
||
|
|
.max_keysize = CAST6_MAX_KEY_SIZE,
|
||
|
|
.setkey = cast6_setkey,
|
||
|
|
.encrypt = cbc_encrypt,
|
||
|
|
.decrypt = cbc_decrypt,
|
||
|
|
},
|
||
|
|
},
|
||
|
|
}, {
|
||
|
|
.cra_name = "__ctr-cast6-avx",
|
||
|
|
.cra_driver_name = "__driver-ctr-cast6-avx",
|
||
|
|
.cra_priority = 0,
|
||
|
|
.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER |
|
||
|
|
CRYPTO_ALG_INTERNAL,
|
||
|
|
.cra_blocksize = 1,
|
||
|
|
.cra_ctxsize = sizeof(struct cast6_ctx),
|
||
|
|
.cra_alignmask = 0,
|
||
|
|
.cra_type = &crypto_blkcipher_type,
|
||
|
|
.cra_module = THIS_MODULE,
|
||
|
|
.cra_u = {
|
||
|
|
.blkcipher = {
|
||
|
|
.min_keysize = CAST6_MIN_KEY_SIZE,
|
||
|
|
.max_keysize = CAST6_MAX_KEY_SIZE,
|
||
|
|
.ivsize = CAST6_BLOCK_SIZE,
|
||
|
|
.setkey = cast6_setkey,
|
||
|
|
.encrypt = ctr_crypt,
|
||
|
|
.decrypt = ctr_crypt,
|
||
|
|
},
|
||
|
|
},
|
||
|
|
}, {
|
||
|
|
.cra_name = "__lrw-cast6-avx",
|
||
|
|
.cra_driver_name = "__driver-lrw-cast6-avx",
|
||
|
|
.cra_priority = 0,
|
||
|
|
.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER |
|
||
|
|
CRYPTO_ALG_INTERNAL,
|
||
|
|
.cra_blocksize = CAST6_BLOCK_SIZE,
|
||
|
|
.cra_ctxsize = sizeof(struct cast6_lrw_ctx),
|
||
|
|
.cra_alignmask = 0,
|
||
|
|
.cra_type = &crypto_blkcipher_type,
|
||
|
|
.cra_module = THIS_MODULE,
|
||
|
|
.cra_exit = lrw_exit_tfm,
|
||
|
|
.cra_u = {
|
||
|
|
.blkcipher = {
|
||
|
|
.min_keysize = CAST6_MIN_KEY_SIZE +
|
||
|
|
CAST6_BLOCK_SIZE,
|
||
|
|
.max_keysize = CAST6_MAX_KEY_SIZE +
|
||
|
|
CAST6_BLOCK_SIZE,
|
||
|
|
.ivsize = CAST6_BLOCK_SIZE,
|
||
|
|
.setkey = lrw_cast6_setkey,
|
||
|
|
.encrypt = lrw_encrypt,
|
||
|
|
.decrypt = lrw_decrypt,
|
||
|
|
},
|
||
|
|
},
|
||
|
|
}, {
|
||
|
|
.cra_name = "__xts-cast6-avx",
|
||
|
|
.cra_driver_name = "__driver-xts-cast6-avx",
|
||
|
|
.cra_priority = 0,
|
||
|
|
.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER |
|
||
|
|
CRYPTO_ALG_INTERNAL,
|
||
|
|
.cra_blocksize = CAST6_BLOCK_SIZE,
|
||
|
|
.cra_ctxsize = sizeof(struct cast6_xts_ctx),
|
||
|
|
.cra_alignmask = 0,
|
||
|
|
.cra_type = &crypto_blkcipher_type,
|
||
|
|
.cra_module = THIS_MODULE,
|
||
|
|
.cra_u = {
|
||
|
|
.blkcipher = {
|
||
|
|
.min_keysize = CAST6_MIN_KEY_SIZE * 2,
|
||
|
|
.max_keysize = CAST6_MAX_KEY_SIZE * 2,
|
||
|
|
.ivsize = CAST6_BLOCK_SIZE,
|
||
|
|
.setkey = xts_cast6_setkey,
|
||
|
|
.encrypt = xts_encrypt,
|
||
|
|
.decrypt = xts_decrypt,
|
||
|
|
},
|
||
|
|
},
|
||
|
|
}, {
|
||
|
|
.cra_name = "ecb(cast6)",
|
||
|
|
.cra_driver_name = "ecb-cast6-avx",
|
||
|
|
.cra_priority = 200,
|
||
|
|
.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
|
||
|
|
.cra_blocksize = CAST6_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 = CAST6_MIN_KEY_SIZE,
|
||
|
|
.max_keysize = CAST6_MAX_KEY_SIZE,
|
||
|
|
.setkey = ablk_set_key,
|
||
|
|
.encrypt = ablk_encrypt,
|
||
|
|
.decrypt = ablk_decrypt,
|
||
|
|
},
|
||
|
|
},
|
||
|
|
}, {
|
||
|
|
.cra_name = "cbc(cast6)",
|
||
|
|
.cra_driver_name = "cbc-cast6-avx",
|
||
|
|
.cra_priority = 200,
|
||
|
|
.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
|
||
|
|
.cra_blocksize = CAST6_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 = CAST6_MIN_KEY_SIZE,
|
||
|
|
.max_keysize = CAST6_MAX_KEY_SIZE,
|
||
|
|
.ivsize = CAST6_BLOCK_SIZE,
|
||
|
|
.setkey = ablk_set_key,
|
||
|
|
.encrypt = __ablk_encrypt,
|
||
|
|
.decrypt = ablk_decrypt,
|
||
|
|
},
|
||
|
|
},
|
||
|
|
}, {
|
||
|
|
.cra_name = "ctr(cast6)",
|
||
|
|
.cra_driver_name = "ctr-cast6-avx",
|
||
|
|
.cra_priority = 200,
|
||
|
|
.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 = CAST6_MIN_KEY_SIZE,
|
||
|
|
.max_keysize = CAST6_MAX_KEY_SIZE,
|
||
|
|
.ivsize = CAST6_BLOCK_SIZE,
|
||
|
|
.setkey = ablk_set_key,
|
||
|
|
.encrypt = ablk_encrypt,
|
||
|
|
.decrypt = ablk_encrypt,
|
||
|
|
.geniv = "chainiv",
|
||
|
|
},
|
||
|
|
},
|
||
|
|
}, {
|
||
|
|
.cra_name = "lrw(cast6)",
|
||
|
|
.cra_driver_name = "lrw-cast6-avx",
|
||
|
|
.cra_priority = 200,
|
||
|
|
.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
|
||
|
|
.cra_blocksize = CAST6_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 = CAST6_MIN_KEY_SIZE +
|
||
|
|
CAST6_BLOCK_SIZE,
|
||
|
|
.max_keysize = CAST6_MAX_KEY_SIZE +
|
||
|
|
CAST6_BLOCK_SIZE,
|
||
|
|
.ivsize = CAST6_BLOCK_SIZE,
|
||
|
|
.setkey = ablk_set_key,
|
||
|
|
.encrypt = ablk_encrypt,
|
||
|
|
.decrypt = ablk_decrypt,
|
||
|
|
},
|
||
|
|
},
|
||
|
|
}, {
|
||
|
|
.cra_name = "xts(cast6)",
|
||
|
|
.cra_driver_name = "xts-cast6-avx",
|
||
|
|
.cra_priority = 200,
|
||
|
|
.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
|
||
|
|
.cra_blocksize = CAST6_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 = CAST6_MIN_KEY_SIZE * 2,
|
||
|
|
.max_keysize = CAST6_MAX_KEY_SIZE * 2,
|
||
|
|
.ivsize = CAST6_BLOCK_SIZE,
|
||
|
|
.setkey = ablk_set_key,
|
||
|
|
.encrypt = ablk_encrypt,
|
||
|
|
.decrypt = ablk_decrypt,
|
||
|
|
},
|
||
|
|
},
|
||
|
|
} };
|
||
|
|
|
||
|
|
static int __init cast6_init(void)
|
||
|
|
{
|
||
|
|
const char *feature_name;
|
||
|
|
|
||
|
|
if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM,
|
||
|
|
&feature_name)) {
|
||
|
|
pr_info("CPU feature '%s' is not supported.\n", feature_name);
|
||
|
|
return -ENODEV;
|
||
|
|
}
|
||
|
|
|
||
|
|
return crypto_register_algs(cast6_algs, ARRAY_SIZE(cast6_algs));
|
||
|
|
}
|
||
|
|
|
||
|
|
static void __exit cast6_exit(void)
|
||
|
|
{
|
||
|
|
crypto_unregister_algs(cast6_algs, ARRAY_SIZE(cast6_algs));
|
||
|
|
}
|
||
|
|
|
||
|
|
module_init(cast6_init);
|
||
|
|
module_exit(cast6_exit);
|
||
|
|
|
||
|
|
MODULE_DESCRIPTION("Cast6 Cipher Algorithm, AVX optimized");
|
||
|
|
MODULE_LICENSE("GPL");
|
||
|
|
MODULE_ALIAS_CRYPTO("cast6");
|