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579 lines
16 KiB
579 lines
16 KiB
/* |
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* Glue Code for AVX assembler version of Twofish 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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|
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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/twofish.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/twofish.h> |
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#include <asm/crypto/glue_helper.h> |
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#include <crypto/scatterwalk.h> |
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#include <linux/workqueue.h> |
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#include <linux/spinlock.h> |
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|
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#define TWOFISH_PARALLEL_BLOCKS 8 |
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|
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/* 8-way parallel cipher functions */ |
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asmlinkage void twofish_ecb_enc_8way(struct twofish_ctx *ctx, u8 *dst, |
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const u8 *src); |
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asmlinkage void twofish_ecb_dec_8way(struct twofish_ctx *ctx, u8 *dst, |
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const u8 *src); |
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|
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asmlinkage void twofish_cbc_dec_8way(struct twofish_ctx *ctx, u8 *dst, |
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const u8 *src); |
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asmlinkage void twofish_ctr_8way(struct twofish_ctx *ctx, u8 *dst, |
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const u8 *src, le128 *iv); |
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|
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asmlinkage void twofish_xts_enc_8way(struct twofish_ctx *ctx, u8 *dst, |
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const u8 *src, le128 *iv); |
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asmlinkage void twofish_xts_dec_8way(struct twofish_ctx *ctx, u8 *dst, |
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const u8 *src, le128 *iv); |
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|
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static inline void twofish_enc_blk_3way(struct twofish_ctx *ctx, u8 *dst, |
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const u8 *src) |
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{ |
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__twofish_enc_blk_3way(ctx, dst, src, false); |
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} |
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|
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static void twofish_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(twofish_enc_blk)); |
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} |
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|
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static void twofish_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(twofish_dec_blk)); |
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} |
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static const struct common_glue_ctx twofish_enc = { |
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.num_funcs = 3, |
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.fpu_blocks_limit = TWOFISH_PARALLEL_BLOCKS, |
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|
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.funcs = { { |
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.num_blocks = TWOFISH_PARALLEL_BLOCKS, |
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.fn_u = { .ecb = GLUE_FUNC_CAST(twofish_ecb_enc_8way) } |
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}, { |
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.num_blocks = 3, |
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.fn_u = { .ecb = GLUE_FUNC_CAST(twofish_enc_blk_3way) } |
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}, { |
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.num_blocks = 1, |
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.fn_u = { .ecb = GLUE_FUNC_CAST(twofish_enc_blk) } |
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} } |
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}; |
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static const struct common_glue_ctx twofish_ctr = { |
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.num_funcs = 3, |
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.fpu_blocks_limit = TWOFISH_PARALLEL_BLOCKS, |
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|
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.funcs = { { |
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.num_blocks = TWOFISH_PARALLEL_BLOCKS, |
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.fn_u = { .ctr = GLUE_CTR_FUNC_CAST(twofish_ctr_8way) } |
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}, { |
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.num_blocks = 3, |
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.fn_u = { .ctr = GLUE_CTR_FUNC_CAST(twofish_enc_blk_ctr_3way) } |
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}, { |
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.num_blocks = 1, |
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.fn_u = { .ctr = GLUE_CTR_FUNC_CAST(twofish_enc_blk_ctr) } |
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} } |
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}; |
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static const struct common_glue_ctx twofish_enc_xts = { |
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.num_funcs = 2, |
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.fpu_blocks_limit = TWOFISH_PARALLEL_BLOCKS, |
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|
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.funcs = { { |
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.num_blocks = TWOFISH_PARALLEL_BLOCKS, |
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.fn_u = { .xts = GLUE_XTS_FUNC_CAST(twofish_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(twofish_xts_enc) } |
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} } |
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}; |
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static const struct common_glue_ctx twofish_dec = { |
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.num_funcs = 3, |
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.fpu_blocks_limit = TWOFISH_PARALLEL_BLOCKS, |
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.funcs = { { |
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.num_blocks = TWOFISH_PARALLEL_BLOCKS, |
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.fn_u = { .ecb = GLUE_FUNC_CAST(twofish_ecb_dec_8way) } |
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}, { |
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.num_blocks = 3, |
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.fn_u = { .ecb = GLUE_FUNC_CAST(twofish_dec_blk_3way) } |
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}, { |
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.num_blocks = 1, |
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.fn_u = { .ecb = GLUE_FUNC_CAST(twofish_dec_blk) } |
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} } |
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}; |
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static const struct common_glue_ctx twofish_dec_cbc = { |
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.num_funcs = 3, |
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.fpu_blocks_limit = TWOFISH_PARALLEL_BLOCKS, |
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.funcs = { { |
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.num_blocks = TWOFISH_PARALLEL_BLOCKS, |
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.fn_u = { .cbc = GLUE_CBC_FUNC_CAST(twofish_cbc_dec_8way) } |
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}, { |
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.num_blocks = 3, |
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.fn_u = { .cbc = GLUE_CBC_FUNC_CAST(twofish_dec_blk_cbc_3way) } |
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}, { |
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.num_blocks = 1, |
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.fn_u = { .cbc = GLUE_CBC_FUNC_CAST(twofish_dec_blk) } |
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} } |
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}; |
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static const struct common_glue_ctx twofish_dec_xts = { |
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.num_funcs = 2, |
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.fpu_blocks_limit = TWOFISH_PARALLEL_BLOCKS, |
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.funcs = { { |
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.num_blocks = TWOFISH_PARALLEL_BLOCKS, |
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.fn_u = { .xts = GLUE_XTS_FUNC_CAST(twofish_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(twofish_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(&twofish_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(&twofish_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(twofish_enc_blk), 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(&twofish_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(&twofish_ctr, desc, dst, src, nbytes); |
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} |
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static inline bool twofish_fpu_begin(bool fpu_enabled, unsigned int nbytes) |
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{ |
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return glue_fpu_begin(TF_BLOCK_SIZE, TWOFISH_PARALLEL_BLOCKS, NULL, |
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fpu_enabled, nbytes); |
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} |
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static inline void twofish_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 twofish_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 = TF_BLOCK_SIZE; |
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struct crypt_priv *ctx = priv; |
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int i; |
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ctx->fpu_enabled = twofish_fpu_begin(ctx->fpu_enabled, nbytes); |
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if (nbytes == bsize * TWOFISH_PARALLEL_BLOCKS) { |
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twofish_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 * 3); i++, srcdst += bsize * 3) |
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twofish_enc_blk_3way(ctx->ctx, srcdst, srcdst); |
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nbytes %= bsize * 3; |
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for (i = 0; i < nbytes / bsize; i++, srcdst += bsize) |
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twofish_enc_blk(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 = TF_BLOCK_SIZE; |
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struct crypt_priv *ctx = priv; |
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int i; |
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ctx->fpu_enabled = twofish_fpu_begin(ctx->fpu_enabled, nbytes); |
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if (nbytes == bsize * TWOFISH_PARALLEL_BLOCKS) { |
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twofish_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 * 3); i++, srcdst += bsize * 3) |
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twofish_dec_blk_3way(ctx->ctx, srcdst, srcdst); |
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nbytes %= bsize * 3; |
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for (i = 0; i < nbytes / bsize; i++, srcdst += bsize) |
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twofish_dec_blk(ctx->ctx, srcdst, srcdst); |
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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 twofish_lrw_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); |
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be128 buf[TWOFISH_PARALLEL_BLOCKS]; |
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struct crypt_priv crypt_ctx = { |
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.ctx = &ctx->twofish_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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twofish_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 twofish_lrw_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); |
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be128 buf[TWOFISH_PARALLEL_BLOCKS]; |
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struct crypt_priv crypt_ctx = { |
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.ctx = &ctx->twofish_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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twofish_fpu_end(crypt_ctx.fpu_enabled); |
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return ret; |
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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 twofish_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); |
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return glue_xts_crypt_128bit(&twofish_enc_xts, desc, dst, src, nbytes, |
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XTS_TWEAK_CAST(twofish_enc_blk), |
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&ctx->tweak_ctx, &ctx->crypt_ctx); |
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} |
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static int xts_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 twofish_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); |
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return glue_xts_crypt_128bit(&twofish_dec_xts, desc, dst, src, nbytes, |
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XTS_TWEAK_CAST(twofish_enc_blk), |
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&ctx->tweak_ctx, &ctx->crypt_ctx); |
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} |
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static struct crypto_alg twofish_algs[10] = { { |
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.cra_name = "__ecb-twofish-avx", |
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.cra_driver_name = "__driver-ecb-twofish-avx", |
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.cra_priority = 0, |
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.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER | |
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CRYPTO_ALG_INTERNAL, |
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.cra_blocksize = TF_BLOCK_SIZE, |
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.cra_ctxsize = sizeof(struct twofish_ctx), |
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.cra_alignmask = 0, |
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.cra_type = &crypto_blkcipher_type, |
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.cra_module = THIS_MODULE, |
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.cra_u = { |
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.blkcipher = { |
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.min_keysize = TF_MIN_KEY_SIZE, |
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.max_keysize = TF_MAX_KEY_SIZE, |
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.setkey = twofish_setkey, |
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.encrypt = ecb_encrypt, |
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.decrypt = ecb_decrypt, |
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}, |
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}, |
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}, { |
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.cra_name = "__cbc-twofish-avx", |
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.cra_driver_name = "__driver-cbc-twofish-avx", |
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.cra_priority = 0, |
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.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER | |
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CRYPTO_ALG_INTERNAL, |
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.cra_blocksize = TF_BLOCK_SIZE, |
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.cra_ctxsize = sizeof(struct twofish_ctx), |
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.cra_alignmask = 0, |
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.cra_type = &crypto_blkcipher_type, |
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.cra_module = THIS_MODULE, |
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.cra_u = { |
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.blkcipher = { |
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.min_keysize = TF_MIN_KEY_SIZE, |
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.max_keysize = TF_MAX_KEY_SIZE, |
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.setkey = twofish_setkey, |
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.encrypt = cbc_encrypt, |
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.decrypt = cbc_decrypt, |
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}, |
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}, |
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}, { |
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.cra_name = "__ctr-twofish-avx", |
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.cra_driver_name = "__driver-ctr-twofish-avx", |
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.cra_priority = 0, |
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.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER | |
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CRYPTO_ALG_INTERNAL, |
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.cra_blocksize = 1, |
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.cra_ctxsize = sizeof(struct twofish_ctx), |
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.cra_alignmask = 0, |
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.cra_type = &crypto_blkcipher_type, |
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.cra_module = THIS_MODULE, |
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.cra_u = { |
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.blkcipher = { |
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.min_keysize = TF_MIN_KEY_SIZE, |
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.max_keysize = TF_MAX_KEY_SIZE, |
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.ivsize = TF_BLOCK_SIZE, |
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.setkey = twofish_setkey, |
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.encrypt = ctr_crypt, |
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.decrypt = ctr_crypt, |
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}, |
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}, |
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}, { |
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.cra_name = "__lrw-twofish-avx", |
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.cra_driver_name = "__driver-lrw-twofish-avx", |
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.cra_priority = 0, |
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.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER | |
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CRYPTO_ALG_INTERNAL, |
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.cra_blocksize = TF_BLOCK_SIZE, |
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.cra_ctxsize = sizeof(struct twofish_lrw_ctx), |
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.cra_alignmask = 0, |
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.cra_type = &crypto_blkcipher_type, |
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.cra_module = THIS_MODULE, |
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.cra_exit = lrw_twofish_exit_tfm, |
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.cra_u = { |
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.blkcipher = { |
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.min_keysize = TF_MIN_KEY_SIZE + |
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TF_BLOCK_SIZE, |
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.max_keysize = TF_MAX_KEY_SIZE + |
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TF_BLOCK_SIZE, |
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.ivsize = TF_BLOCK_SIZE, |
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.setkey = lrw_twofish_setkey, |
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.encrypt = lrw_encrypt, |
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.decrypt = lrw_decrypt, |
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}, |
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}, |
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}, { |
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.cra_name = "__xts-twofish-avx", |
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.cra_driver_name = "__driver-xts-twofish-avx", |
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.cra_priority = 0, |
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.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER | |
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CRYPTO_ALG_INTERNAL, |
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.cra_blocksize = TF_BLOCK_SIZE, |
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.cra_ctxsize = sizeof(struct twofish_xts_ctx), |
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.cra_alignmask = 0, |
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.cra_type = &crypto_blkcipher_type, |
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.cra_module = THIS_MODULE, |
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.cra_u = { |
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.blkcipher = { |
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.min_keysize = TF_MIN_KEY_SIZE * 2, |
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.max_keysize = TF_MAX_KEY_SIZE * 2, |
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.ivsize = TF_BLOCK_SIZE, |
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.setkey = xts_twofish_setkey, |
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.encrypt = xts_encrypt, |
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.decrypt = xts_decrypt, |
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}, |
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}, |
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}, { |
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.cra_name = "ecb(twofish)", |
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.cra_driver_name = "ecb-twofish-avx", |
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.cra_priority = 400, |
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.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, |
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.cra_blocksize = TF_BLOCK_SIZE, |
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.cra_ctxsize = sizeof(struct async_helper_ctx), |
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.cra_alignmask = 0, |
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.cra_type = &crypto_ablkcipher_type, |
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.cra_module = THIS_MODULE, |
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.cra_init = ablk_init, |
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.cra_exit = ablk_exit, |
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.cra_u = { |
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.ablkcipher = { |
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.min_keysize = TF_MIN_KEY_SIZE, |
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.max_keysize = TF_MAX_KEY_SIZE, |
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.setkey = ablk_set_key, |
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.encrypt = ablk_encrypt, |
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.decrypt = ablk_decrypt, |
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}, |
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}, |
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}, { |
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.cra_name = "cbc(twofish)", |
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.cra_driver_name = "cbc-twofish-avx", |
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.cra_priority = 400, |
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.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, |
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.cra_blocksize = TF_BLOCK_SIZE, |
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.cra_ctxsize = sizeof(struct async_helper_ctx), |
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.cra_alignmask = 0, |
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.cra_type = &crypto_ablkcipher_type, |
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.cra_module = THIS_MODULE, |
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.cra_init = ablk_init, |
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.cra_exit = ablk_exit, |
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.cra_u = { |
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.ablkcipher = { |
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.min_keysize = TF_MIN_KEY_SIZE, |
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.max_keysize = TF_MAX_KEY_SIZE, |
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.ivsize = TF_BLOCK_SIZE, |
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.setkey = ablk_set_key, |
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.encrypt = __ablk_encrypt, |
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.decrypt = ablk_decrypt, |
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}, |
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}, |
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}, { |
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.cra_name = "ctr(twofish)", |
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.cra_driver_name = "ctr-twofish-avx", |
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.cra_priority = 400, |
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.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, |
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.cra_blocksize = 1, |
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.cra_ctxsize = sizeof(struct async_helper_ctx), |
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.cra_alignmask = 0, |
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.cra_type = &crypto_ablkcipher_type, |
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.cra_module = THIS_MODULE, |
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.cra_init = ablk_init, |
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.cra_exit = ablk_exit, |
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.cra_u = { |
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.ablkcipher = { |
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.min_keysize = TF_MIN_KEY_SIZE, |
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.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) |
|
{ |
|
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(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_CRYPTO("twofish");
|
|
|