cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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serpent_avx_glue.c (3793B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/*
      3 * Glue Code for AVX assembler versions of Serpent Cipher
      4 *
      5 * Copyright (C) 2012 Johannes Goetzfried
      6 *     <Johannes.Goetzfried@informatik.stud.uni-erlangen.de>
      7 *
      8 * Copyright © 2011-2013 Jussi Kivilinna <jussi.kivilinna@iki.fi>
      9 */
     10
     11#include <linux/module.h>
     12#include <linux/types.h>
     13#include <linux/crypto.h>
     14#include <linux/err.h>
     15#include <crypto/algapi.h>
     16#include <crypto/internal/simd.h>
     17#include <crypto/serpent.h>
     18
     19#include "serpent-avx.h"
     20#include "ecb_cbc_helpers.h"
     21
     22/* 8-way parallel cipher functions */
     23asmlinkage void serpent_ecb_enc_8way_avx(const void *ctx, u8 *dst,
     24					 const u8 *src);
     25EXPORT_SYMBOL_GPL(serpent_ecb_enc_8way_avx);
     26
     27asmlinkage void serpent_ecb_dec_8way_avx(const void *ctx, u8 *dst,
     28					 const u8 *src);
     29EXPORT_SYMBOL_GPL(serpent_ecb_dec_8way_avx);
     30
     31asmlinkage void serpent_cbc_dec_8way_avx(const void *ctx, u8 *dst,
     32					 const u8 *src);
     33EXPORT_SYMBOL_GPL(serpent_cbc_dec_8way_avx);
     34
     35static int serpent_setkey_skcipher(struct crypto_skcipher *tfm,
     36				   const u8 *key, unsigned int keylen)
     37{
     38	return __serpent_setkey(crypto_skcipher_ctx(tfm), key, keylen);
     39}
     40
     41static int ecb_encrypt(struct skcipher_request *req)
     42{
     43	ECB_WALK_START(req, SERPENT_BLOCK_SIZE, SERPENT_PARALLEL_BLOCKS);
     44	ECB_BLOCK(SERPENT_PARALLEL_BLOCKS, serpent_ecb_enc_8way_avx);
     45	ECB_BLOCK(1, __serpent_encrypt);
     46	ECB_WALK_END();
     47}
     48
     49static int ecb_decrypt(struct skcipher_request *req)
     50{
     51	ECB_WALK_START(req, SERPENT_BLOCK_SIZE, SERPENT_PARALLEL_BLOCKS);
     52	ECB_BLOCK(SERPENT_PARALLEL_BLOCKS, serpent_ecb_dec_8way_avx);
     53	ECB_BLOCK(1, __serpent_decrypt);
     54	ECB_WALK_END();
     55}
     56
     57static int cbc_encrypt(struct skcipher_request *req)
     58{
     59	CBC_WALK_START(req, SERPENT_BLOCK_SIZE, -1);
     60	CBC_ENC_BLOCK(__serpent_encrypt);
     61	CBC_WALK_END();
     62}
     63
     64static int cbc_decrypt(struct skcipher_request *req)
     65{
     66	CBC_WALK_START(req, SERPENT_BLOCK_SIZE, SERPENT_PARALLEL_BLOCKS);
     67	CBC_DEC_BLOCK(SERPENT_PARALLEL_BLOCKS, serpent_cbc_dec_8way_avx);
     68	CBC_DEC_BLOCK(1, __serpent_decrypt);
     69	CBC_WALK_END();
     70}
     71
     72static struct skcipher_alg serpent_algs[] = {
     73	{
     74		.base.cra_name		= "__ecb(serpent)",
     75		.base.cra_driver_name	= "__ecb-serpent-avx",
     76		.base.cra_priority	= 500,
     77		.base.cra_flags		= CRYPTO_ALG_INTERNAL,
     78		.base.cra_blocksize	= SERPENT_BLOCK_SIZE,
     79		.base.cra_ctxsize	= sizeof(struct serpent_ctx),
     80		.base.cra_module	= THIS_MODULE,
     81		.min_keysize		= SERPENT_MIN_KEY_SIZE,
     82		.max_keysize		= SERPENT_MAX_KEY_SIZE,
     83		.setkey			= serpent_setkey_skcipher,
     84		.encrypt		= ecb_encrypt,
     85		.decrypt		= ecb_decrypt,
     86	}, {
     87		.base.cra_name		= "__cbc(serpent)",
     88		.base.cra_driver_name	= "__cbc-serpent-avx",
     89		.base.cra_priority	= 500,
     90		.base.cra_flags		= CRYPTO_ALG_INTERNAL,
     91		.base.cra_blocksize	= SERPENT_BLOCK_SIZE,
     92		.base.cra_ctxsize	= sizeof(struct serpent_ctx),
     93		.base.cra_module	= THIS_MODULE,
     94		.min_keysize		= SERPENT_MIN_KEY_SIZE,
     95		.max_keysize		= SERPENT_MAX_KEY_SIZE,
     96		.ivsize			= SERPENT_BLOCK_SIZE,
     97		.setkey			= serpent_setkey_skcipher,
     98		.encrypt		= cbc_encrypt,
     99		.decrypt		= cbc_decrypt,
    100	},
    101};
    102
    103static struct simd_skcipher_alg *serpent_simd_algs[ARRAY_SIZE(serpent_algs)];
    104
    105static int __init serpent_init(void)
    106{
    107	const char *feature_name;
    108
    109	if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM,
    110				&feature_name)) {
    111		pr_info("CPU feature '%s' is not supported.\n", feature_name);
    112		return -ENODEV;
    113	}
    114
    115	return simd_register_skciphers_compat(serpent_algs,
    116					      ARRAY_SIZE(serpent_algs),
    117					      serpent_simd_algs);
    118}
    119
    120static void __exit serpent_exit(void)
    121{
    122	simd_unregister_skciphers(serpent_algs, ARRAY_SIZE(serpent_algs),
    123				  serpent_simd_algs);
    124}
    125
    126module_init(serpent_init);
    127module_exit(serpent_exit);
    128
    129MODULE_DESCRIPTION("Serpent Cipher Algorithm, AVX optimized");
    130MODULE_LICENSE("GPL");
    131MODULE_ALIAS_CRYPTO("serpent");