LXR linux/arch/x86/crypto/cast5_avx

   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * Glue Code for the AVX assembler implementation of the Cast5 Cipher
   4 *
   5 * Copyright (C) 2012 Johannes Goetzfried
   6 *     <Johannes.Goetzfried@informatik.stud.uni-erlangen.de>
   7 */
   8
   9#include <crypto/algapi.h>
  10#include <crypto/cast5.h>
  11#include <crypto/internal/simd.h>
  12#include <linux/crypto.h>
  13#include <linux/err.h>
  14#include <linux/module.h>
  15#include <linux/types.h>
  16
  17#include "ecb_cbc_helpers.h"
  18
  19#define CAST5_PARALLEL_BLOCKS 16
  20
  21asmlinkage void cast5_ecb_enc_16way(struct cast5_ctx *ctx, u8 *dst,
  22                                    const u8 *src);
  23asmlinkage void cast5_ecb_dec_16way(struct cast5_ctx *ctx, u8 *dst,
  24                                    const u8 *src);
  25asmlinkage void cast5_cbc_dec_16way(struct cast5_ctx *ctx, u8 *dst,
  26                                    const u8 *src);
  27
  28static int cast5_setkey_skcipher(struct crypto_skcipher *tfm, const u8 *key,
  29                                 unsigned int keylen)
  30{
  31        return cast5_setkey(&tfm->base, key, keylen);
  32}
  33
  34static int ecb_encrypt(struct skcipher_request *req)
  35{
  36        ECB_WALK_START(req, CAST5_BLOCK_SIZE, CAST5_PARALLEL_BLOCKS);
  37        ECB_BLOCK(CAST5_PARALLEL_BLOCKS, cast5_ecb_enc_16way);
  38        ECB_BLOCK(1, __cast5_encrypt);
  39        ECB_WALK_END();
  40}
  41
  42static int ecb_decrypt(struct skcipher_request *req)
  43{
  44        ECB_WALK_START(req, CAST5_BLOCK_SIZE, CAST5_PARALLEL_BLOCKS);
  45        ECB_BLOCK(CAST5_PARALLEL_BLOCKS, cast5_ecb_dec_16way);
  46        ECB_BLOCK(1, __cast5_decrypt);
  47        ECB_WALK_END();
  48}
  49
  50static int cbc_encrypt(struct skcipher_request *req)
  51{
  52        CBC_WALK_START(req, CAST5_BLOCK_SIZE, -1);
  53        CBC_ENC_BLOCK(__cast5_encrypt);
  54        CBC_WALK_END();
  55}
  56
  57static int cbc_decrypt(struct skcipher_request *req)
  58{
  59        CBC_WALK_START(req, CAST5_BLOCK_SIZE, CAST5_PARALLEL_BLOCKS);
  60        CBC_DEC_BLOCK(CAST5_PARALLEL_BLOCKS, cast5_cbc_dec_16way);
  61        CBC_DEC_BLOCK(1, __cast5_decrypt);
  62        CBC_WALK_END();
  63}
  64
  65static struct skcipher_alg cast5_algs[] = {
  66        {
  67                .base.cra_name          = "__ecb(cast5)",
  68                .base.cra_driver_name   = "__ecb-cast5-avx",
  69                .base.cra_priority      = 200,
  70                .base.cra_flags         = CRYPTO_ALG_INTERNAL,
  71                .base.cra_blocksize     = CAST5_BLOCK_SIZE,
  72                .base.cra_ctxsize       = sizeof(struct cast5_ctx),
  73                .base.cra_module        = THIS_MODULE,
  74                .min_keysize            = CAST5_MIN_KEY_SIZE,
  75                .max_keysize            = CAST5_MAX_KEY_SIZE,
  76                .setkey                 = cast5_setkey_skcipher,
  77                .encrypt                = ecb_encrypt,
  78                .decrypt                = ecb_decrypt,
  79        }, {
  80                .base.cra_name          = "__cbc(cast5)",
  81                .base.cra_driver_name   = "__cbc-cast5-avx",
  82                .base.cra_priority      = 200,
  83                .base.cra_flags         = CRYPTO_ALG_INTERNAL,
  84                .base.cra_blocksize     = CAST5_BLOCK_SIZE,
  85                .base.cra_ctxsize       = sizeof(struct cast5_ctx),
  86                .base.cra_module        = THIS_MODULE,
  87                .min_keysize            = CAST5_MIN_KEY_SIZE,
  88                .max_keysize            = CAST5_MAX_KEY_SIZE,
  89                .ivsize                 = CAST5_BLOCK_SIZE,
  90                .setkey                 = cast5_setkey_skcipher,
  91                .encrypt                = cbc_encrypt,
  92                .decrypt                = cbc_decrypt,
  93        }
  94};
  95
  96static struct simd_skcipher_alg *cast5_simd_algs[ARRAY_SIZE(cast5_algs)];
  97
  98static int __init cast5_init(void)
  99{
 100        const char *feature_name;
 101
 102        if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM,
 103                                &feature_name)) {
 104                pr_info("CPU feature '%s' is not supported.\n", feature_name);
 105                return -ENODEV;
 106        }
 107
 108        return simd_register_skciphers_compat(cast5_algs,
 109                                              ARRAY_SIZE(cast5_algs),
 110                                              cast5_simd_algs);
 111}
 112
 113static void __exit cast5_exit(void)
 114{
 115        simd_unregister_skciphers(cast5_algs, ARRAY_SIZE(cast5_algs),
 116                                  cast5_simd_algs);
 117}
 118
 119module_init(cast5_init);
 120module_exit(cast5_exit);
 121
 122MODULE_DESCRIPTION("Cast5 Cipher Algorithm, AVX optimized");
 123MODULE_LICENSE("GPL");
 124MODULE_ALIAS_CRYPTO("cast5");
 125