diff options
Diffstat (limited to 'arch/x86/crypto/cast5_avx_glue.c')
| -rw-r--r-- | arch/x86/crypto/cast5_avx_glue.c | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/arch/x86/crypto/cast5_avx_glue.c b/arch/x86/crypto/cast5_avx_glue.c new file mode 100644 index 000000000..3976a87f9 --- /dev/null +++ b/arch/x86/crypto/cast5_avx_glue.c @@ -0,0 +1,124 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Glue Code for the AVX assembler implementation of the Cast5 Cipher + * + * Copyright (C) 2012 Johannes Goetzfried + * <Johannes.Goetzfried@informatik.stud.uni-erlangen.de> + */ + +#include <crypto/algapi.h> +#include <crypto/cast5.h> +#include <crypto/internal/simd.h> +#include <linux/crypto.h> +#include <linux/err.h> +#include <linux/module.h> +#include <linux/types.h> + +#include "ecb_cbc_helpers.h" + +#define CAST5_PARALLEL_BLOCKS 16 + +asmlinkage void cast5_ecb_enc_16way(struct cast5_ctx *ctx, u8 *dst, + const u8 *src); +asmlinkage void cast5_ecb_dec_16way(struct cast5_ctx *ctx, u8 *dst, + const u8 *src); +asmlinkage void cast5_cbc_dec_16way(struct cast5_ctx *ctx, u8 *dst, + const u8 *src); + +static int cast5_setkey_skcipher(struct crypto_skcipher *tfm, const u8 *key, + unsigned int keylen) +{ + return cast5_setkey(&tfm->base, key, keylen); +} + +static int ecb_encrypt(struct skcipher_request *req) +{ + ECB_WALK_START(req, CAST5_BLOCK_SIZE, CAST5_PARALLEL_BLOCKS); + ECB_BLOCK(CAST5_PARALLEL_BLOCKS, cast5_ecb_enc_16way); + ECB_BLOCK(1, __cast5_encrypt); + ECB_WALK_END(); +} + +static int ecb_decrypt(struct skcipher_request *req) +{ + ECB_WALK_START(req, CAST5_BLOCK_SIZE, CAST5_PARALLEL_BLOCKS); + ECB_BLOCK(CAST5_PARALLEL_BLOCKS, cast5_ecb_dec_16way); + ECB_BLOCK(1, __cast5_decrypt); + ECB_WALK_END(); +} + +static int cbc_encrypt(struct skcipher_request *req) +{ + CBC_WALK_START(req, CAST5_BLOCK_SIZE, -1); + CBC_ENC_BLOCK(__cast5_encrypt); + CBC_WALK_END(); +} + +static int cbc_decrypt(struct skcipher_request *req) +{ + CBC_WALK_START(req, CAST5_BLOCK_SIZE, CAST5_PARALLEL_BLOCKS); + CBC_DEC_BLOCK(CAST5_PARALLEL_BLOCKS, cast5_cbc_dec_16way); + CBC_DEC_BLOCK(1, __cast5_decrypt); + CBC_WALK_END(); +} + +static struct skcipher_alg cast5_algs[] = { + { + .base.cra_name = "__ecb(cast5)", + .base.cra_driver_name = "__ecb-cast5-avx", + .base.cra_priority = 200, + .base.cra_flags = CRYPTO_ALG_INTERNAL, + .base.cra_blocksize = CAST5_BLOCK_SIZE, + .base.cra_ctxsize = sizeof(struct cast5_ctx), + .base.cra_module = THIS_MODULE, + .min_keysize = CAST5_MIN_KEY_SIZE, + .max_keysize = CAST5_MAX_KEY_SIZE, + .setkey = cast5_setkey_skcipher, + .encrypt = ecb_encrypt, + .decrypt = ecb_decrypt, + }, { + .base.cra_name = "__cbc(cast5)", + .base.cra_driver_name = "__cbc-cast5-avx", + .base.cra_priority = 200, + .base.cra_flags = CRYPTO_ALG_INTERNAL, + .base.cra_blocksize = CAST5_BLOCK_SIZE, + .base.cra_ctxsize = sizeof(struct cast5_ctx), + .base.cra_module = THIS_MODULE, + .min_keysize = CAST5_MIN_KEY_SIZE, + .max_keysize = CAST5_MAX_KEY_SIZE, + .ivsize = CAST5_BLOCK_SIZE, + .setkey = cast5_setkey_skcipher, + .encrypt = cbc_encrypt, + .decrypt = cbc_decrypt, + } +}; + +static struct simd_skcipher_alg *cast5_simd_algs[ARRAY_SIZE(cast5_algs)]; + +static int __init cast5_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 simd_register_skciphers_compat(cast5_algs, + ARRAY_SIZE(cast5_algs), + cast5_simd_algs); +} + +static void __exit cast5_exit(void) +{ + simd_unregister_skciphers(cast5_algs, ARRAY_SIZE(cast5_algs), + cast5_simd_algs); +} + +module_init(cast5_init); +module_exit(cast5_exit); + +MODULE_DESCRIPTION("Cast5 Cipher Algorithm, AVX optimized"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS_CRYPTO("cast5"); |