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