diff options
Diffstat (limited to 'arch/x86/crypto/blake2s-glue.c')
| -rw-r--r-- | arch/x86/crypto/blake2s-glue.c | 235 |
1 files changed, 235 insertions, 0 deletions
diff --git a/arch/x86/crypto/blake2s-glue.c b/arch/x86/crypto/blake2s-glue.c new file mode 100644 index 000000000000..1d9ff8a45e1f --- /dev/null +++ b/arch/x86/crypto/blake2s-glue.c @@ -0,0 +1,235 @@ +// 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 <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(PAGE_SIZE / BLAKE2S_BLOCK_SIZE < 8); + + if (!static_branch_likely(&blake2s_use_ssse3) || !crypto_simd_usable()) { + blake2s_compress_generic(state, block, nblocks, inc); + return; + } + + for (;;) { + const size_t blocks = min_t(size_t, nblocks, + PAGE_SIZE / 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; + if (!nblocks) + break; + block += blocks * BLAKE2S_BLOCK_SIZE; + } +} +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) { + crypto_shash_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN); + 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"); |