2019-05-27 14:55:05 +08:00
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// SPDX-License-Identifier: GPL-2.0-or-later
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2012-06-12 16:47:43 +08:00
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/*
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* Glue Code for AVX assembler versions of Serpent 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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2013-04-09 02:50:55 +08:00
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* Copyright © 2011-2013 Jussi Kivilinna <jussi.kivilinna@iki.fi>
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2012-06-12 16:47:43 +08:00
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*/
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#include <linux/module.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/algapi.h>
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2018-02-20 15:48:06 +08:00
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#include <crypto/internal/simd.h>
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2012-06-12 16:47:43 +08:00
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#include <crypto/serpent.h>
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#include <crypto/xts.h>
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2012-06-18 19:07:24 +08:00
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#include <asm/crypto/glue_helper.h>
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#include <asm/crypto/serpent-avx.h>
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2012-06-12 16:47:43 +08:00
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2013-04-13 18:46:55 +08:00
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/* 8-way parallel cipher functions */
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2019-11-27 14:08:02 +08:00
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asmlinkage void serpent_ecb_enc_8way_avx(const void *ctx, u8 *dst,
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const u8 *src);
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EXPORT_SYMBOL_GPL(serpent_ecb_enc_8way_avx);
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2019-11-27 14:08:02 +08:00
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asmlinkage void serpent_ecb_dec_8way_avx(const void *ctx, u8 *dst,
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const u8 *src);
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EXPORT_SYMBOL_GPL(serpent_ecb_dec_8way_avx);
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asmlinkage void serpent_cbc_dec_8way_avx(const void *ctx, u8 *dst,
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const u8 *src);
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EXPORT_SYMBOL_GPL(serpent_cbc_dec_8way_avx);
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2019-11-27 14:08:02 +08:00
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asmlinkage void serpent_ctr_8way_avx(const void *ctx, u8 *dst, const u8 *src,
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le128 *iv);
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EXPORT_SYMBOL_GPL(serpent_ctr_8way_avx);
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asmlinkage void serpent_xts_enc_8way_avx(const void *ctx, u8 *dst,
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const u8 *src, le128 *iv);
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EXPORT_SYMBOL_GPL(serpent_xts_enc_8way_avx);
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asmlinkage void serpent_xts_dec_8way_avx(const void *ctx, u8 *dst,
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const u8 *src, le128 *iv);
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EXPORT_SYMBOL_GPL(serpent_xts_dec_8way_avx);
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void __serpent_crypt_ctr(const void *ctx, u8 *d, const u8 *s, le128 *iv)
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{
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be128 ctrblk;
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u128 *dst = (u128 *)d;
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const u128 *src = (const u128 *)s;
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2012-06-12 16:47:43 +08:00
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2012-10-20 20:06:36 +08:00
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le128_to_be128(&ctrblk, iv);
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le128_inc(iv);
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2012-06-12 16:47:43 +08:00
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2012-06-18 19:07:24 +08:00
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__serpent_encrypt(ctx, (u8 *)&ctrblk, (u8 *)&ctrblk);
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u128_xor(dst, src, (u128 *)&ctrblk);
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}
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EXPORT_SYMBOL_GPL(__serpent_crypt_ctr);
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void serpent_xts_enc(const void *ctx, u8 *dst, const u8 *src, le128 *iv)
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{
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glue_xts_crypt_128bit_one(ctx, dst, src, iv, __serpent_encrypt);
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}
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2013-04-13 18:46:55 +08:00
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EXPORT_SYMBOL_GPL(serpent_xts_enc);
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void serpent_xts_dec(const void *ctx, u8 *dst, const u8 *src, le128 *iv)
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{
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glue_xts_crypt_128bit_one(ctx, dst, src, iv, __serpent_decrypt);
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}
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2013-04-13 18:46:55 +08:00
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EXPORT_SYMBOL_GPL(serpent_xts_dec);
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2018-02-20 15:48:06 +08:00
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static int serpent_setkey_skcipher(struct crypto_skcipher *tfm,
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const u8 *key, unsigned int keylen)
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{
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return __serpent_setkey(crypto_skcipher_ctx(tfm), key, keylen);
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}
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int xts_serpent_setkey(struct crypto_skcipher *tfm, const u8 *key,
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unsigned int keylen)
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{
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struct serpent_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
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int err;
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err = xts_verify_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 = __serpent_setkey(&ctx->crypt_ctx, key, keylen / 2);
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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 __serpent_setkey(&ctx->tweak_ctx, key + keylen / 2, keylen / 2);
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}
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EXPORT_SYMBOL_GPL(xts_serpent_setkey);
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2013-04-09 02:50:55 +08:00
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2012-06-18 19:07:24 +08:00
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static const struct common_glue_ctx serpent_enc = {
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.num_funcs = 2,
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.fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS,
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2012-06-12 16:47:43 +08:00
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2012-06-18 19:07:24 +08:00
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.funcs = { {
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.num_blocks = SERPENT_PARALLEL_BLOCKS,
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.fn_u = { .ecb = serpent_ecb_enc_8way_avx }
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}, {
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.num_blocks = 1,
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.fn_u = { .ecb = __serpent_encrypt }
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} }
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};
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2012-06-12 16:47:43 +08:00
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2012-06-18 19:07:24 +08:00
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static const struct common_glue_ctx serpent_ctr = {
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.num_funcs = 2,
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.fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS,
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.funcs = { {
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.num_blocks = SERPENT_PARALLEL_BLOCKS,
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.fn_u = { .ctr = serpent_ctr_8way_avx }
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}, {
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.num_blocks = 1,
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.fn_u = { .ctr = __serpent_crypt_ctr }
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2012-06-18 19:07:24 +08:00
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} }
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};
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2012-06-12 16:47:43 +08:00
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2013-04-09 02:50:55 +08:00
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static const struct common_glue_ctx serpent_enc_xts = {
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.num_funcs = 2,
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.fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS,
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.funcs = { {
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.num_blocks = SERPENT_PARALLEL_BLOCKS,
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.fn_u = { .xts = serpent_xts_enc_8way_avx }
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}, {
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.num_blocks = 1,
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.fn_u = { .xts = serpent_xts_enc }
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} }
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};
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2012-06-18 19:07:24 +08:00
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static const struct common_glue_ctx serpent_dec = {
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.num_funcs = 2,
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.fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS,
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.funcs = { {
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.num_blocks = SERPENT_PARALLEL_BLOCKS,
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.fn_u = { .ecb = serpent_ecb_dec_8way_avx }
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}, {
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.num_blocks = 1,
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.fn_u = { .ecb = __serpent_decrypt }
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} }
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};
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2012-06-18 19:07:24 +08:00
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static const struct common_glue_ctx serpent_dec_cbc = {
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.num_funcs = 2,
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.fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS,
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.funcs = { {
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.num_blocks = SERPENT_PARALLEL_BLOCKS,
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.fn_u = { .cbc = serpent_cbc_dec_8way_avx }
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2012-06-18 19:07:24 +08:00
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}, {
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.num_blocks = 1,
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.fn_u = { .cbc = __serpent_decrypt }
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2012-06-18 19:07:24 +08:00
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} }
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};
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2012-06-12 16:47:43 +08:00
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2013-04-09 02:50:55 +08:00
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static const struct common_glue_ctx serpent_dec_xts = {
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.num_funcs = 2,
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.fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS,
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.funcs = { {
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.num_blocks = SERPENT_PARALLEL_BLOCKS,
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.fn_u = { .xts = serpent_xts_dec_8way_avx }
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2013-04-09 02:50:55 +08:00
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}, {
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.num_blocks = 1,
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2019-11-27 14:08:02 +08:00
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.fn_u = { .xts = serpent_xts_dec }
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2013-04-09 02:50:55 +08:00
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} }
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};
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2018-02-20 15:48:06 +08:00
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static int ecb_encrypt(struct skcipher_request *req)
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{
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2018-02-20 15:48:06 +08:00
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return glue_ecb_req_128bit(&serpent_enc, req);
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2012-06-12 16:47:43 +08:00
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}
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2018-02-20 15:48:06 +08:00
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static int ecb_decrypt(struct skcipher_request *req)
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{
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2018-02-20 15:48:06 +08:00
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return glue_ecb_req_128bit(&serpent_dec, req);
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2012-06-12 16:47:43 +08:00
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}
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2018-02-20 15:48:06 +08:00
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static int cbc_encrypt(struct skcipher_request *req)
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{
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return glue_cbc_encrypt_req_128bit(__serpent_encrypt, req);
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2012-06-12 16:47:43 +08:00
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}
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2018-02-20 15:48:06 +08:00
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static int cbc_decrypt(struct skcipher_request *req)
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{
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2018-02-20 15:48:06 +08:00
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return glue_cbc_decrypt_req_128bit(&serpent_dec_cbc, req);
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2012-06-12 16:47:43 +08:00
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}
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2018-02-20 15:48:06 +08:00
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static int ctr_crypt(struct skcipher_request *req)
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{
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return glue_ctr_req_128bit(&serpent_ctr, req);
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}
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2018-02-20 15:48:06 +08:00
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static int xts_encrypt(struct skcipher_request *req)
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{
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
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struct serpent_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
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2012-06-12 16:47:43 +08:00
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2018-02-20 15:48:06 +08:00
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return glue_xts_req_128bit(&serpent_enc_xts, req,
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__serpent_encrypt, &ctx->tweak_ctx,
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&ctx->crypt_ctx, false);
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2012-06-12 16:47:43 +08:00
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}
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2018-02-20 15:48:06 +08:00
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static int xts_decrypt(struct skcipher_request *req)
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2012-06-12 16:47:43 +08:00
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{
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
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struct serpent_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
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2012-06-12 16:47:43 +08:00
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2018-02-20 15:48:06 +08:00
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return glue_xts_req_128bit(&serpent_dec_xts, req,
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2019-11-27 14:08:02 +08:00
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__serpent_encrypt, &ctx->tweak_ctx,
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&ctx->crypt_ctx, true);
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2012-06-12 16:47:43 +08:00
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}
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2018-02-20 15:48:06 +08:00
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static struct skcipher_alg serpent_algs[] = {
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{
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.base.cra_name = "__ecb(serpent)",
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.base.cra_driver_name = "__ecb-serpent-avx",
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.base.cra_priority = 500,
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.base.cra_flags = CRYPTO_ALG_INTERNAL,
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.base.cra_blocksize = SERPENT_BLOCK_SIZE,
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.base.cra_ctxsize = sizeof(struct serpent_ctx),
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.base.cra_module = THIS_MODULE,
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.min_keysize = SERPENT_MIN_KEY_SIZE,
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.max_keysize = SERPENT_MAX_KEY_SIZE,
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.setkey = serpent_setkey_skcipher,
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.encrypt = ecb_encrypt,
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.decrypt = ecb_decrypt,
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}, {
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.base.cra_name = "__cbc(serpent)",
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.base.cra_driver_name = "__cbc-serpent-avx",
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.base.cra_priority = 500,
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.base.cra_flags = CRYPTO_ALG_INTERNAL,
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.base.cra_blocksize = SERPENT_BLOCK_SIZE,
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.base.cra_ctxsize = sizeof(struct serpent_ctx),
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.base.cra_module = THIS_MODULE,
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.min_keysize = SERPENT_MIN_KEY_SIZE,
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.max_keysize = SERPENT_MAX_KEY_SIZE,
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.ivsize = SERPENT_BLOCK_SIZE,
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.setkey = serpent_setkey_skcipher,
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.encrypt = cbc_encrypt,
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.decrypt = cbc_decrypt,
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}, {
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.base.cra_name = "__ctr(serpent)",
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.base.cra_driver_name = "__ctr-serpent-avx",
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.base.cra_priority = 500,
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.base.cra_flags = CRYPTO_ALG_INTERNAL,
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.base.cra_blocksize = 1,
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.base.cra_ctxsize = sizeof(struct serpent_ctx),
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.base.cra_module = THIS_MODULE,
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.min_keysize = SERPENT_MIN_KEY_SIZE,
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.max_keysize = SERPENT_MAX_KEY_SIZE,
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.ivsize = SERPENT_BLOCK_SIZE,
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.chunksize = SERPENT_BLOCK_SIZE,
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.setkey = serpent_setkey_skcipher,
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.encrypt = ctr_crypt,
|
|
|
|
.decrypt = ctr_crypt,
|
|
|
|
}, {
|
|
|
|
.base.cra_name = "__xts(serpent)",
|
|
|
|
.base.cra_driver_name = "__xts-serpent-avx",
|
|
|
|
.base.cra_priority = 500,
|
|
|
|
.base.cra_flags = CRYPTO_ALG_INTERNAL,
|
|
|
|
.base.cra_blocksize = SERPENT_BLOCK_SIZE,
|
|
|
|
.base.cra_ctxsize = sizeof(struct serpent_xts_ctx),
|
|
|
|
.base.cra_module = THIS_MODULE,
|
|
|
|
.min_keysize = 2 * SERPENT_MIN_KEY_SIZE,
|
|
|
|
.max_keysize = 2 * SERPENT_MAX_KEY_SIZE,
|
|
|
|
.ivsize = SERPENT_BLOCK_SIZE,
|
|
|
|
.setkey = xts_serpent_setkey,
|
|
|
|
.encrypt = xts_encrypt,
|
|
|
|
.decrypt = xts_decrypt,
|
2012-06-12 16:47:43 +08:00
|
|
|
},
|
2018-02-20 15:48:06 +08:00
|
|
|
};
|
|
|
|
|
|
|
|
static struct simd_skcipher_alg *serpent_simd_algs[ARRAY_SIZE(serpent_algs)];
|
2012-06-12 16:47:43 +08:00
|
|
|
|
|
|
|
static int __init serpent_init(void)
|
|
|
|
{
|
2015-04-28 16:11:24 +08:00
|
|
|
const char *feature_name;
|
2012-06-12 16:47:43 +08:00
|
|
|
|
2015-09-03 07:31:26 +08:00
|
|
|
if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM,
|
|
|
|
&feature_name)) {
|
2015-04-28 16:11:24 +08:00
|
|
|
pr_info("CPU feature '%s' is not supported.\n", feature_name);
|
2012-06-12 16:47:43 +08:00
|
|
|
return -ENODEV;
|
|
|
|
}
|
|
|
|
|
2018-02-20 15:48:06 +08:00
|
|
|
return simd_register_skciphers_compat(serpent_algs,
|
|
|
|
ARRAY_SIZE(serpent_algs),
|
|
|
|
serpent_simd_algs);
|
2012-06-12 16:47:43 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
static void __exit serpent_exit(void)
|
|
|
|
{
|
2018-02-20 15:48:06 +08:00
|
|
|
simd_unregister_skciphers(serpent_algs, ARRAY_SIZE(serpent_algs),
|
|
|
|
serpent_simd_algs);
|
2012-06-12 16:47:43 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
module_init(serpent_init);
|
|
|
|
module_exit(serpent_exit);
|
|
|
|
|
|
|
|
MODULE_DESCRIPTION("Serpent Cipher Algorithm, AVX optimized");
|
|
|
|
MODULE_LICENSE("GPL");
|
2014-11-21 09:05:53 +08:00
|
|
|
MODULE_ALIAS_CRYPTO("serpent");
|