mirror of https://gitee.com/openkylin/linux.git
232 lines
6.8 KiB
C
232 lines
6.8 KiB
C
// SPDX-License-Identifier: GPL-2.0 OR MIT
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/*
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* Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
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*/
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#include <crypto/internal/blake2s.h>
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#include <crypto/internal/simd.h>
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#include <crypto/internal/hash.h>
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#include <linux/types.h>
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#include <linux/jump_label.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <asm/cpufeature.h>
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#include <asm/fpu/api.h>
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#include <asm/processor.h>
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#include <asm/simd.h>
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asmlinkage void blake2s_compress_ssse3(struct blake2s_state *state,
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const u8 *block, const size_t nblocks,
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const u32 inc);
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asmlinkage void blake2s_compress_avx512(struct blake2s_state *state,
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const u8 *block, const size_t nblocks,
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const u32 inc);
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static __ro_after_init DEFINE_STATIC_KEY_FALSE(blake2s_use_ssse3);
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static __ro_after_init DEFINE_STATIC_KEY_FALSE(blake2s_use_avx512);
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void blake2s_compress_arch(struct blake2s_state *state,
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const u8 *block, size_t nblocks,
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const u32 inc)
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{
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/* SIMD disables preemption, so relax after processing each page. */
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BUILD_BUG_ON(SZ_4K / BLAKE2S_BLOCK_SIZE < 8);
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if (!static_branch_likely(&blake2s_use_ssse3) || !crypto_simd_usable()) {
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blake2s_compress_generic(state, block, nblocks, inc);
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return;
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}
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do {
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const size_t blocks = min_t(size_t, nblocks,
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SZ_4K / BLAKE2S_BLOCK_SIZE);
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kernel_fpu_begin();
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if (IS_ENABLED(CONFIG_AS_AVX512) &&
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static_branch_likely(&blake2s_use_avx512))
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blake2s_compress_avx512(state, block, blocks, inc);
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else
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blake2s_compress_ssse3(state, block, blocks, inc);
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kernel_fpu_end();
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nblocks -= blocks;
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block += blocks * BLAKE2S_BLOCK_SIZE;
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} while (nblocks);
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}
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EXPORT_SYMBOL(blake2s_compress_arch);
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static int crypto_blake2s_setkey(struct crypto_shash *tfm, const u8 *key,
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unsigned int keylen)
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{
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struct blake2s_tfm_ctx *tctx = crypto_shash_ctx(tfm);
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if (keylen == 0 || keylen > BLAKE2S_KEY_SIZE)
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return -EINVAL;
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memcpy(tctx->key, key, keylen);
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tctx->keylen = keylen;
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return 0;
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}
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static int crypto_blake2s_init(struct shash_desc *desc)
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{
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struct blake2s_tfm_ctx *tctx = crypto_shash_ctx(desc->tfm);
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struct blake2s_state *state = shash_desc_ctx(desc);
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const int outlen = crypto_shash_digestsize(desc->tfm);
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if (tctx->keylen)
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blake2s_init_key(state, outlen, tctx->key, tctx->keylen);
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else
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blake2s_init(state, outlen);
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return 0;
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}
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static int crypto_blake2s_update(struct shash_desc *desc, const u8 *in,
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unsigned int inlen)
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{
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struct blake2s_state *state = shash_desc_ctx(desc);
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const size_t fill = BLAKE2S_BLOCK_SIZE - state->buflen;
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if (unlikely(!inlen))
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return 0;
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if (inlen > fill) {
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memcpy(state->buf + state->buflen, in, fill);
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blake2s_compress_arch(state, state->buf, 1, BLAKE2S_BLOCK_SIZE);
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state->buflen = 0;
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in += fill;
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inlen -= fill;
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}
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if (inlen > BLAKE2S_BLOCK_SIZE) {
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const size_t nblocks = DIV_ROUND_UP(inlen, BLAKE2S_BLOCK_SIZE);
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/* Hash one less (full) block than strictly possible */
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blake2s_compress_arch(state, in, nblocks - 1, BLAKE2S_BLOCK_SIZE);
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in += BLAKE2S_BLOCK_SIZE * (nblocks - 1);
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inlen -= BLAKE2S_BLOCK_SIZE * (nblocks - 1);
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}
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memcpy(state->buf + state->buflen, in, inlen);
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state->buflen += inlen;
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return 0;
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}
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static int crypto_blake2s_final(struct shash_desc *desc, u8 *out)
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{
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struct blake2s_state *state = shash_desc_ctx(desc);
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blake2s_set_lastblock(state);
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memset(state->buf + state->buflen, 0,
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BLAKE2S_BLOCK_SIZE - state->buflen); /* Padding */
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blake2s_compress_arch(state, state->buf, 1, state->buflen);
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cpu_to_le32_array(state->h, ARRAY_SIZE(state->h));
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memcpy(out, state->h, state->outlen);
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memzero_explicit(state, sizeof(*state));
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return 0;
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}
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static struct shash_alg blake2s_algs[] = {{
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.base.cra_name = "blake2s-128",
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.base.cra_driver_name = "blake2s-128-x86",
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.base.cra_flags = CRYPTO_ALG_OPTIONAL_KEY,
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.base.cra_ctxsize = sizeof(struct blake2s_tfm_ctx),
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.base.cra_priority = 200,
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.base.cra_blocksize = BLAKE2S_BLOCK_SIZE,
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.base.cra_module = THIS_MODULE,
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.digestsize = BLAKE2S_128_HASH_SIZE,
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.setkey = crypto_blake2s_setkey,
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.init = crypto_blake2s_init,
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.update = crypto_blake2s_update,
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.final = crypto_blake2s_final,
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.descsize = sizeof(struct blake2s_state),
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}, {
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.base.cra_name = "blake2s-160",
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.base.cra_driver_name = "blake2s-160-x86",
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.base.cra_flags = CRYPTO_ALG_OPTIONAL_KEY,
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.base.cra_ctxsize = sizeof(struct blake2s_tfm_ctx),
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.base.cra_priority = 200,
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.base.cra_blocksize = BLAKE2S_BLOCK_SIZE,
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.base.cra_module = THIS_MODULE,
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.digestsize = BLAKE2S_160_HASH_SIZE,
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.setkey = crypto_blake2s_setkey,
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.init = crypto_blake2s_init,
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.update = crypto_blake2s_update,
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.final = crypto_blake2s_final,
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.descsize = sizeof(struct blake2s_state),
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}, {
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.base.cra_name = "blake2s-224",
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.base.cra_driver_name = "blake2s-224-x86",
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.base.cra_flags = CRYPTO_ALG_OPTIONAL_KEY,
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.base.cra_ctxsize = sizeof(struct blake2s_tfm_ctx),
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.base.cra_priority = 200,
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.base.cra_blocksize = BLAKE2S_BLOCK_SIZE,
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.base.cra_module = THIS_MODULE,
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.digestsize = BLAKE2S_224_HASH_SIZE,
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.setkey = crypto_blake2s_setkey,
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.init = crypto_blake2s_init,
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.update = crypto_blake2s_update,
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.final = crypto_blake2s_final,
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.descsize = sizeof(struct blake2s_state),
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}, {
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.base.cra_name = "blake2s-256",
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.base.cra_driver_name = "blake2s-256-x86",
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.base.cra_flags = CRYPTO_ALG_OPTIONAL_KEY,
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.base.cra_ctxsize = sizeof(struct blake2s_tfm_ctx),
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.base.cra_priority = 200,
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.base.cra_blocksize = BLAKE2S_BLOCK_SIZE,
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.base.cra_module = THIS_MODULE,
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.digestsize = BLAKE2S_256_HASH_SIZE,
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.setkey = crypto_blake2s_setkey,
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.init = crypto_blake2s_init,
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.update = crypto_blake2s_update,
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.final = crypto_blake2s_final,
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.descsize = sizeof(struct blake2s_state),
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}};
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static int __init blake2s_mod_init(void)
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{
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if (!boot_cpu_has(X86_FEATURE_SSSE3))
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return 0;
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static_branch_enable(&blake2s_use_ssse3);
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if (IS_ENABLED(CONFIG_AS_AVX512) &&
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boot_cpu_has(X86_FEATURE_AVX) &&
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boot_cpu_has(X86_FEATURE_AVX2) &&
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boot_cpu_has(X86_FEATURE_AVX512F) &&
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boot_cpu_has(X86_FEATURE_AVX512VL) &&
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cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM |
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XFEATURE_MASK_AVX512, NULL))
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static_branch_enable(&blake2s_use_avx512);
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return IS_REACHABLE(CONFIG_CRYPTO_HASH) ?
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crypto_register_shashes(blake2s_algs,
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ARRAY_SIZE(blake2s_algs)) : 0;
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}
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static void __exit blake2s_mod_exit(void)
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{
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if (IS_REACHABLE(CONFIG_CRYPTO_HASH) && boot_cpu_has(X86_FEATURE_SSSE3))
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crypto_unregister_shashes(blake2s_algs, ARRAY_SIZE(blake2s_algs));
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}
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module_init(blake2s_mod_init);
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module_exit(blake2s_mod_exit);
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MODULE_ALIAS_CRYPTO("blake2s-128");
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MODULE_ALIAS_CRYPTO("blake2s-128-x86");
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MODULE_ALIAS_CRYPTO("blake2s-160");
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MODULE_ALIAS_CRYPTO("blake2s-160-x86");
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MODULE_ALIAS_CRYPTO("blake2s-224");
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MODULE_ALIAS_CRYPTO("blake2s-224-x86");
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MODULE_ALIAS_CRYPTO("blake2s-256");
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MODULE_ALIAS_CRYPTO("blake2s-256-x86");
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MODULE_LICENSE("GPL v2");
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