235 lines
6.9 KiB
C
235 lines
6.9 KiB
C
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/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Glue Code for the AVX/AES-NI/GFNI assembler implementation of the ARIA Cipher
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*
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* Copyright (c) 2022 Taehee Yoo <ap420073@gmail.com>
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*/
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#include <crypto/algapi.h>
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#include <crypto/internal/simd.h>
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#include <crypto/aria.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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#include "aria-avx.h"
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asmlinkage void aria_aesni_avx_encrypt_16way(const void *ctx, u8 *dst,
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const u8 *src);
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EXPORT_SYMBOL_GPL(aria_aesni_avx_encrypt_16way);
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asmlinkage void aria_aesni_avx_decrypt_16way(const void *ctx, u8 *dst,
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const u8 *src);
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EXPORT_SYMBOL_GPL(aria_aesni_avx_decrypt_16way);
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asmlinkage void aria_aesni_avx_ctr_crypt_16way(const void *ctx, u8 *dst,
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const u8 *src,
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u8 *keystream, u8 *iv);
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EXPORT_SYMBOL_GPL(aria_aesni_avx_ctr_crypt_16way);
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#ifdef CONFIG_AS_GFNI
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asmlinkage void aria_aesni_avx_gfni_encrypt_16way(const void *ctx, u8 *dst,
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const u8 *src);
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EXPORT_SYMBOL_GPL(aria_aesni_avx_gfni_encrypt_16way);
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asmlinkage void aria_aesni_avx_gfni_decrypt_16way(const void *ctx, u8 *dst,
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const u8 *src);
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EXPORT_SYMBOL_GPL(aria_aesni_avx_gfni_decrypt_16way);
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asmlinkage void aria_aesni_avx_gfni_ctr_crypt_16way(const void *ctx, u8 *dst,
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const u8 *src,
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u8 *keystream, u8 *iv);
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EXPORT_SYMBOL_GPL(aria_aesni_avx_gfni_ctr_crypt_16way);
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#endif /* CONFIG_AS_GFNI */
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static struct aria_avx_ops aria_ops;
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struct aria_avx_request_ctx {
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u8 keystream[ARIA_AESNI_PARALLEL_BLOCK_SIZE];
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};
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static int ecb_do_encrypt(struct skcipher_request *req, const u32 *rkey)
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{
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ECB_WALK_START(req, ARIA_BLOCK_SIZE, ARIA_AESNI_PARALLEL_BLOCKS);
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ECB_BLOCK(ARIA_AESNI_PARALLEL_BLOCKS, aria_ops.aria_encrypt_16way);
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ECB_BLOCK(1, aria_encrypt);
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ECB_WALK_END();
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}
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static int ecb_do_decrypt(struct skcipher_request *req, const u32 *rkey)
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{
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ECB_WALK_START(req, ARIA_BLOCK_SIZE, ARIA_AESNI_PARALLEL_BLOCKS);
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ECB_BLOCK(ARIA_AESNI_PARALLEL_BLOCKS, aria_ops.aria_decrypt_16way);
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ECB_BLOCK(1, aria_decrypt);
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ECB_WALK_END();
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}
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static int aria_avx_ecb_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 aria_ctx *ctx = crypto_skcipher_ctx(tfm);
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return ecb_do_encrypt(req, ctx->enc_key[0]);
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}
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static int aria_avx_ecb_decrypt(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 aria_ctx *ctx = crypto_skcipher_ctx(tfm);
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return ecb_do_decrypt(req, ctx->dec_key[0]);
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}
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static int aria_avx_set_key(struct crypto_skcipher *tfm, const u8 *key,
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unsigned int keylen)
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{
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return aria_set_key(&tfm->base, key, keylen);
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}
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static int aria_avx_ctr_encrypt(struct skcipher_request *req)
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{
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struct aria_avx_request_ctx *req_ctx = skcipher_request_ctx(req);
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
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struct aria_ctx *ctx = crypto_skcipher_ctx(tfm);
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struct skcipher_walk walk;
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unsigned int nbytes;
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int err;
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err = skcipher_walk_virt(&walk, req, false);
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while ((nbytes = walk.nbytes) > 0) {
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const u8 *src = walk.src.virt.addr;
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u8 *dst = walk.dst.virt.addr;
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while (nbytes >= ARIA_AESNI_PARALLEL_BLOCK_SIZE) {
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kernel_fpu_begin();
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aria_ops.aria_ctr_crypt_16way(ctx, dst, src,
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&req_ctx->keystream[0],
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walk.iv);
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kernel_fpu_end();
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dst += ARIA_AESNI_PARALLEL_BLOCK_SIZE;
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src += ARIA_AESNI_PARALLEL_BLOCK_SIZE;
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nbytes -= ARIA_AESNI_PARALLEL_BLOCK_SIZE;
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}
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while (nbytes >= ARIA_BLOCK_SIZE) {
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memcpy(&req_ctx->keystream[0], walk.iv, ARIA_BLOCK_SIZE);
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crypto_inc(walk.iv, ARIA_BLOCK_SIZE);
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aria_encrypt(ctx, &req_ctx->keystream[0],
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&req_ctx->keystream[0]);
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crypto_xor_cpy(dst, src, &req_ctx->keystream[0],
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ARIA_BLOCK_SIZE);
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dst += ARIA_BLOCK_SIZE;
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src += ARIA_BLOCK_SIZE;
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nbytes -= ARIA_BLOCK_SIZE;
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}
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if (walk.nbytes == walk.total && nbytes > 0) {
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memcpy(&req_ctx->keystream[0], walk.iv,
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ARIA_BLOCK_SIZE);
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crypto_inc(walk.iv, ARIA_BLOCK_SIZE);
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aria_encrypt(ctx, &req_ctx->keystream[0],
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&req_ctx->keystream[0]);
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crypto_xor_cpy(dst, src, &req_ctx->keystream[0],
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nbytes);
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dst += nbytes;
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src += nbytes;
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nbytes = 0;
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}
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err = skcipher_walk_done(&walk, nbytes);
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}
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return err;
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}
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static int aria_avx_init_tfm(struct crypto_skcipher *tfm)
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{
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crypto_skcipher_set_reqsize(tfm, sizeof(struct aria_avx_request_ctx));
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return 0;
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}
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static struct skcipher_alg aria_algs[] = {
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{
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.base.cra_name = "__ecb(aria)",
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.base.cra_driver_name = "__ecb-aria-avx",
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.base.cra_priority = 400,
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.base.cra_flags = CRYPTO_ALG_INTERNAL,
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.base.cra_blocksize = ARIA_BLOCK_SIZE,
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.base.cra_ctxsize = sizeof(struct aria_ctx),
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.base.cra_module = THIS_MODULE,
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.min_keysize = ARIA_MIN_KEY_SIZE,
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.max_keysize = ARIA_MAX_KEY_SIZE,
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.setkey = aria_avx_set_key,
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.encrypt = aria_avx_ecb_encrypt,
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.decrypt = aria_avx_ecb_decrypt,
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}, {
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.base.cra_name = "__ctr(aria)",
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.base.cra_driver_name = "__ctr-aria-avx",
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.base.cra_priority = 400,
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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 aria_ctx),
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.base.cra_module = THIS_MODULE,
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.min_keysize = ARIA_MIN_KEY_SIZE,
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.max_keysize = ARIA_MAX_KEY_SIZE,
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.ivsize = ARIA_BLOCK_SIZE,
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.chunksize = ARIA_BLOCK_SIZE,
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.walksize = 16 * ARIA_BLOCK_SIZE,
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.setkey = aria_avx_set_key,
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.encrypt = aria_avx_ctr_encrypt,
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.decrypt = aria_avx_ctr_encrypt,
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.init = aria_avx_init_tfm,
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}
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};
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static struct simd_skcipher_alg *aria_simd_algs[ARRAY_SIZE(aria_algs)];
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static int __init aria_avx_init(void)
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{
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const char *feature_name;
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if (!boot_cpu_has(X86_FEATURE_AVX) ||
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!boot_cpu_has(X86_FEATURE_AES) ||
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!boot_cpu_has(X86_FEATURE_OSXSAVE)) {
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pr_info("AVX or AES-NI instructions are not detected.\n");
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return -ENODEV;
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}
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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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if (boot_cpu_has(X86_FEATURE_GFNI) && IS_ENABLED(CONFIG_AS_GFNI)) {
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aria_ops.aria_encrypt_16way = aria_aesni_avx_gfni_encrypt_16way;
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aria_ops.aria_decrypt_16way = aria_aesni_avx_gfni_decrypt_16way;
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aria_ops.aria_ctr_crypt_16way = aria_aesni_avx_gfni_ctr_crypt_16way;
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} else {
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aria_ops.aria_encrypt_16way = aria_aesni_avx_encrypt_16way;
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aria_ops.aria_decrypt_16way = aria_aesni_avx_decrypt_16way;
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aria_ops.aria_ctr_crypt_16way = aria_aesni_avx_ctr_crypt_16way;
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}
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return simd_register_skciphers_compat(aria_algs,
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ARRAY_SIZE(aria_algs),
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aria_simd_algs);
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}
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static void __exit aria_avx_exit(void)
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{
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simd_unregister_skciphers(aria_algs, ARRAY_SIZE(aria_algs),
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aria_simd_algs);
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}
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module_init(aria_avx_init);
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module_exit(aria_avx_exit);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Taehee Yoo <ap420073@gmail.com>");
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MODULE_DESCRIPTION("ARIA Cipher Algorithm, AVX/AES-NI/GFNI optimized");
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MODULE_ALIAS_CRYPTO("aria");
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MODULE_ALIAS_CRYPTO("aria-aesni-avx");
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