125 lines
3.4 KiB
C
125 lines
3.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Glue Code for the AVX assembler implementation of the Cast5 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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#include <crypto/algapi.h>
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#include <crypto/cast5.h>
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#include <crypto/internal/simd.h>
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#include <linux/crypto.h>
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#include <linux/err.h>
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#include <linux/module.h>
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#include <linux/types.h>
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#include "ecb_cbc_helpers.h"
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#define CAST5_PARALLEL_BLOCKS 16
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asmlinkage void cast5_ecb_enc_16way(struct cast5_ctx *ctx, u8 *dst,
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const u8 *src);
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asmlinkage void cast5_ecb_dec_16way(struct cast5_ctx *ctx, u8 *dst,
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const u8 *src);
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asmlinkage void cast5_cbc_dec_16way(struct cast5_ctx *ctx, u8 *dst,
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const u8 *src);
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static int cast5_setkey_skcipher(struct crypto_skcipher *tfm, const u8 *key,
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unsigned int keylen)
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{
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return cast5_setkey(&tfm->base, key, keylen);
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}
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static int ecb_encrypt(struct skcipher_request *req)
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{
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ECB_WALK_START(req, CAST5_BLOCK_SIZE, CAST5_PARALLEL_BLOCKS);
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ECB_BLOCK(CAST5_PARALLEL_BLOCKS, cast5_ecb_enc_16way);
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ECB_BLOCK(1, __cast5_encrypt);
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ECB_WALK_END();
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}
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static int ecb_decrypt(struct skcipher_request *req)
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{
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ECB_WALK_START(req, CAST5_BLOCK_SIZE, CAST5_PARALLEL_BLOCKS);
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ECB_BLOCK(CAST5_PARALLEL_BLOCKS, cast5_ecb_dec_16way);
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ECB_BLOCK(1, __cast5_decrypt);
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ECB_WALK_END();
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}
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static int cbc_encrypt(struct skcipher_request *req)
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{
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CBC_WALK_START(req, CAST5_BLOCK_SIZE, -1);
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CBC_ENC_BLOCK(__cast5_encrypt);
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CBC_WALK_END();
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}
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static int cbc_decrypt(struct skcipher_request *req)
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{
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CBC_WALK_START(req, CAST5_BLOCK_SIZE, CAST5_PARALLEL_BLOCKS);
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CBC_DEC_BLOCK(CAST5_PARALLEL_BLOCKS, cast5_cbc_dec_16way);
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CBC_DEC_BLOCK(1, __cast5_decrypt);
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CBC_WALK_END();
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}
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static struct skcipher_alg cast5_algs[] = {
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{
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.base.cra_name = "__ecb(cast5)",
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.base.cra_driver_name = "__ecb-cast5-avx",
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.base.cra_priority = 200,
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.base.cra_flags = CRYPTO_ALG_INTERNAL,
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.base.cra_blocksize = CAST5_BLOCK_SIZE,
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.base.cra_ctxsize = sizeof(struct cast5_ctx),
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.base.cra_module = THIS_MODULE,
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.min_keysize = CAST5_MIN_KEY_SIZE,
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.max_keysize = CAST5_MAX_KEY_SIZE,
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.setkey = cast5_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(cast5)",
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.base.cra_driver_name = "__cbc-cast5-avx",
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.base.cra_priority = 200,
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.base.cra_flags = CRYPTO_ALG_INTERNAL,
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.base.cra_blocksize = CAST5_BLOCK_SIZE,
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.base.cra_ctxsize = sizeof(struct cast5_ctx),
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.base.cra_module = THIS_MODULE,
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.min_keysize = CAST5_MIN_KEY_SIZE,
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.max_keysize = CAST5_MAX_KEY_SIZE,
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.ivsize = CAST5_BLOCK_SIZE,
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.setkey = cast5_setkey_skcipher,
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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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static struct simd_skcipher_alg *cast5_simd_algs[ARRAY_SIZE(cast5_algs)];
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static int __init cast5_init(void)
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{
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const char *feature_name;
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if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM,
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&feature_name)) {
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pr_info("CPU feature '%s' is not supported.\n", feature_name);
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return -ENODEV;
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}
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return simd_register_skciphers_compat(cast5_algs,
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ARRAY_SIZE(cast5_algs),
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cast5_simd_algs);
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}
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static void __exit cast5_exit(void)
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{
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simd_unregister_skciphers(cast5_algs, ARRAY_SIZE(cast5_algs),
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cast5_simd_algs);
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}
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module_init(cast5_init);
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module_exit(cast5_exit);
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MODULE_DESCRIPTION("Cast5 Cipher Algorithm, AVX optimized");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS_CRYPTO("cast5");
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