mirror of https://github.com/torvalds/linux.git
crypto: blake2b - Reimplement using library API
Replace blake2b_generic.c with a new file blake2b.c which implements the
BLAKE2b crypto_shash algorithms on top of the BLAKE2b library API.
Change the driver name suffix from "-generic" to "-lib" to reflect that
these algorithms now just use the (possibly arch-optimized) library.
This closely mirrors crypto/{md5,sha1,sha256,sha512}.c.
Remove include/crypto/internal/blake2b.h since it is no longer used.
Likewise, remove struct blake2b_state from include/crypto/blake2b.h.
Omit support for import_core and export_core, since there are no legacy
drivers that need these for these algorithms.
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20251018043106.375964-10-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
This commit is contained in:
Eric Biggers
parent
ba6617bd47
commit
fa3ca9bfe3
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@ -881,6 +881,7 @@ menu "Hashes, digests, and MACs"
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config CRYPTO_BLAKE2B
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tristate "BLAKE2b"
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select CRYPTO_HASH
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select CRYPTO_LIB_BLAKE2B
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help
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BLAKE2b cryptographic hash function (RFC 7693)
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@ -83,8 +83,7 @@ obj-$(CONFIG_CRYPTO_SM3_GENERIC) += sm3_generic.o
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obj-$(CONFIG_CRYPTO_STREEBOG) += streebog_generic.o
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obj-$(CONFIG_CRYPTO_WP512) += wp512.o
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CFLAGS_wp512.o := $(call cc-option,-fno-schedule-insns) # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79149
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obj-$(CONFIG_CRYPTO_BLAKE2B) += blake2b_generic.o
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CFLAGS_blake2b_generic.o := -Wframe-larger-than=4096 # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105930
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obj-$(CONFIG_CRYPTO_BLAKE2B) += blake2b.o
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obj-$(CONFIG_CRYPTO_ECB) += ecb.o
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obj-$(CONFIG_CRYPTO_CBC) += cbc.o
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obj-$(CONFIG_CRYPTO_PCBC) += pcbc.o
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@ -0,0 +1,111 @@
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Crypto API support for BLAKE2b
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*
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* Copyright 2025 Google LLC
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*/
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#include <crypto/blake2b.h>
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#include <crypto/internal/hash.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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struct blake2b_tfm_ctx {
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unsigned int keylen;
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u8 key[BLAKE2B_KEY_SIZE];
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};
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static int crypto_blake2b_setkey(struct crypto_shash *tfm,
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const u8 *key, unsigned int keylen)
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{
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struct blake2b_tfm_ctx *tctx = crypto_shash_ctx(tfm);
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if (keylen > BLAKE2B_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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#define BLAKE2B_CTX(desc) ((struct blake2b_ctx *)shash_desc_ctx(desc))
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static int crypto_blake2b_init(struct shash_desc *desc)
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{
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const struct blake2b_tfm_ctx *tctx = crypto_shash_ctx(desc->tfm);
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unsigned int digestsize = crypto_shash_digestsize(desc->tfm);
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blake2b_init_key(BLAKE2B_CTX(desc), digestsize,
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tctx->key, tctx->keylen);
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return 0;
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}
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static int crypto_blake2b_update(struct shash_desc *desc,
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const u8 *data, unsigned int len)
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{
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blake2b_update(BLAKE2B_CTX(desc), data, len);
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return 0;
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}
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static int crypto_blake2b_final(struct shash_desc *desc, u8 *out)
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{
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blake2b_final(BLAKE2B_CTX(desc), out);
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return 0;
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}
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static int crypto_blake2b_digest(struct shash_desc *desc,
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const u8 *data, unsigned int len, u8 *out)
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{
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const struct blake2b_tfm_ctx *tctx = crypto_shash_ctx(desc->tfm);
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unsigned int digestsize = crypto_shash_digestsize(desc->tfm);
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blake2b(tctx->key, tctx->keylen, data, len, out, digestsize);
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return 0;
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}
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#define BLAKE2B_ALG(name, digest_size) \
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{ \
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.base.cra_name = name, \
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.base.cra_driver_name = name "-lib", \
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.base.cra_priority = 300, \
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.base.cra_flags = CRYPTO_ALG_OPTIONAL_KEY, \
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.base.cra_blocksize = BLAKE2B_BLOCK_SIZE, \
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.base.cra_ctxsize = sizeof(struct blake2b_tfm_ctx), \
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.base.cra_module = THIS_MODULE, \
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.digestsize = digest_size, \
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.setkey = crypto_blake2b_setkey, \
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.init = crypto_blake2b_init, \
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.update = crypto_blake2b_update, \
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.final = crypto_blake2b_final, \
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.digest = crypto_blake2b_digest, \
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.descsize = sizeof(struct blake2b_ctx), \
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}
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static struct shash_alg algs[] = {
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BLAKE2B_ALG("blake2b-160", BLAKE2B_160_HASH_SIZE),
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BLAKE2B_ALG("blake2b-256", BLAKE2B_256_HASH_SIZE),
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BLAKE2B_ALG("blake2b-384", BLAKE2B_384_HASH_SIZE),
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BLAKE2B_ALG("blake2b-512", BLAKE2B_512_HASH_SIZE),
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};
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static int __init crypto_blake2b_mod_init(void)
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{
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return crypto_register_shashes(algs, ARRAY_SIZE(algs));
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}
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module_init(crypto_blake2b_mod_init);
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static void __exit crypto_blake2b_mod_exit(void)
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{
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crypto_unregister_shashes(algs, ARRAY_SIZE(algs));
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}
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module_exit(crypto_blake2b_mod_exit);
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("Crypto API support for BLAKE2b");
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MODULE_ALIAS_CRYPTO("blake2b-160");
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MODULE_ALIAS_CRYPTO("blake2b-160-lib");
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MODULE_ALIAS_CRYPTO("blake2b-256");
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MODULE_ALIAS_CRYPTO("blake2b-256-lib");
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MODULE_ALIAS_CRYPTO("blake2b-384");
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MODULE_ALIAS_CRYPTO("blake2b-384-lib");
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MODULE_ALIAS_CRYPTO("blake2b-512");
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MODULE_ALIAS_CRYPTO("blake2b-512-lib");
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@ -1,192 +0,0 @@
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// SPDX-License-Identifier: (GPL-2.0-only OR Apache-2.0)
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/*
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* Generic implementation of the BLAKE2b digest algorithm. Based on the BLAKE2b
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* reference implementation, but it has been heavily modified for use in the
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* kernel. The reference implementation was:
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*
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* Copyright 2012, Samuel Neves <sneves@dei.uc.pt>. You may use this under
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* the terms of the CC0, the OpenSSL Licence, or the Apache Public License
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* 2.0, at your option. The terms of these licenses can be found at:
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*
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* - CC0 1.0 Universal : http://creativecommons.org/publicdomain/zero/1.0
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* - OpenSSL license : https://www.openssl.org/source/license.html
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* - Apache 2.0 : https://www.apache.org/licenses/LICENSE-2.0
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*
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* More information about BLAKE2 can be found at https://blake2.net.
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*/
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#include <crypto/internal/blake2b.h>
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#include <crypto/internal/hash.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/string.h>
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#include <linux/unaligned.h>
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static const u8 blake2b_sigma[12][16] = {
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{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },
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{ 14, 10, 4, 8, 9, 15, 13, 6, 1, 12, 0, 2, 11, 7, 5, 3 },
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{ 11, 8, 12, 0, 5, 2, 15, 13, 10, 14, 3, 6, 7, 1, 9, 4 },
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{ 7, 9, 3, 1, 13, 12, 11, 14, 2, 6, 5, 10, 4, 0, 15, 8 },
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{ 9, 0, 5, 7, 2, 4, 10, 15, 14, 1, 11, 12, 6, 8, 3, 13 },
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{ 2, 12, 6, 10, 0, 11, 8, 3, 4, 13, 7, 5, 15, 14, 1, 9 },
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{ 12, 5, 1, 15, 14, 13, 4, 10, 0, 7, 6, 3, 9, 2, 8, 11 },
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{ 13, 11, 7, 14, 12, 1, 3, 9, 5, 0, 15, 4, 8, 6, 2, 10 },
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{ 6, 15, 14, 9, 11, 3, 0, 8, 12, 2, 13, 7, 1, 4, 10, 5 },
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{ 10, 2, 8, 4, 7, 6, 1, 5, 15, 11, 9, 14, 3, 12, 13, 0 },
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{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },
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{ 14, 10, 4, 8, 9, 15, 13, 6, 1, 12, 0, 2, 11, 7, 5, 3 }
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};
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static void blake2b_increment_counter(struct blake2b_state *S, const u64 inc)
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{
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S->t[0] += inc;
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S->t[1] += (S->t[0] < inc);
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}
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#define G(r,i,a,b,c,d) \
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do { \
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a = a + b + m[blake2b_sigma[r][2*i+0]]; \
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d = ror64(d ^ a, 32); \
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c = c + d; \
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b = ror64(b ^ c, 24); \
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a = a + b + m[blake2b_sigma[r][2*i+1]]; \
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d = ror64(d ^ a, 16); \
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c = c + d; \
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b = ror64(b ^ c, 63); \
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} while (0)
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#define ROUND(r) \
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do { \
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G(r,0,v[ 0],v[ 4],v[ 8],v[12]); \
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G(r,1,v[ 1],v[ 5],v[ 9],v[13]); \
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G(r,2,v[ 2],v[ 6],v[10],v[14]); \
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G(r,3,v[ 3],v[ 7],v[11],v[15]); \
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G(r,4,v[ 0],v[ 5],v[10],v[15]); \
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G(r,5,v[ 1],v[ 6],v[11],v[12]); \
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G(r,6,v[ 2],v[ 7],v[ 8],v[13]); \
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G(r,7,v[ 3],v[ 4],v[ 9],v[14]); \
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} while (0)
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static void blake2b_compress_one_generic(struct blake2b_state *S,
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const u8 block[BLAKE2B_BLOCK_SIZE])
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{
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u64 m[16];
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u64 v[16];
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size_t i;
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for (i = 0; i < 16; ++i)
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m[i] = get_unaligned_le64(block + i * sizeof(m[i]));
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for (i = 0; i < 8; ++i)
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v[i] = S->h[i];
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v[ 8] = BLAKE2B_IV0;
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v[ 9] = BLAKE2B_IV1;
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v[10] = BLAKE2B_IV2;
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v[11] = BLAKE2B_IV3;
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v[12] = BLAKE2B_IV4 ^ S->t[0];
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v[13] = BLAKE2B_IV5 ^ S->t[1];
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v[14] = BLAKE2B_IV6 ^ S->f[0];
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v[15] = BLAKE2B_IV7 ^ S->f[1];
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ROUND(0);
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ROUND(1);
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ROUND(2);
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ROUND(3);
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ROUND(4);
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ROUND(5);
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ROUND(6);
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ROUND(7);
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ROUND(8);
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ROUND(9);
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ROUND(10);
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ROUND(11);
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#ifdef CONFIG_CC_IS_CLANG
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#pragma nounroll /* https://llvm.org/pr45803 */
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#endif
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for (i = 0; i < 8; ++i)
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S->h[i] = S->h[i] ^ v[i] ^ v[i + 8];
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}
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#undef G
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#undef ROUND
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static void blake2b_compress_generic(struct blake2b_state *state,
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const u8 *block, size_t nblocks, u32 inc)
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{
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do {
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blake2b_increment_counter(state, inc);
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blake2b_compress_one_generic(state, block);
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block += BLAKE2B_BLOCK_SIZE;
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} while (--nblocks);
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}
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static int crypto_blake2b_update_generic(struct shash_desc *desc,
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const u8 *in, unsigned int inlen)
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{
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return crypto_blake2b_update_bo(desc, in, inlen,
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blake2b_compress_generic);
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}
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static int crypto_blake2b_finup_generic(struct shash_desc *desc, const u8 *in,
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unsigned int inlen, u8 *out)
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{
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return crypto_blake2b_finup(desc, in, inlen, out,
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blake2b_compress_generic);
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}
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#define BLAKE2B_ALG(name, driver_name, digest_size) \
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{ \
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.base.cra_name = name, \
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.base.cra_driver_name = driver_name, \
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.base.cra_priority = 100, \
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.base.cra_flags = CRYPTO_ALG_OPTIONAL_KEY | \
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CRYPTO_AHASH_ALG_BLOCK_ONLY | \
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CRYPTO_AHASH_ALG_FINAL_NONZERO, \
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.base.cra_blocksize = BLAKE2B_BLOCK_SIZE, \
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.base.cra_ctxsize = sizeof(struct blake2b_tfm_ctx), \
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.base.cra_module = THIS_MODULE, \
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.digestsize = digest_size, \
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.setkey = crypto_blake2b_setkey, \
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.init = crypto_blake2b_init, \
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.update = crypto_blake2b_update_generic, \
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.finup = crypto_blake2b_finup_generic, \
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.descsize = BLAKE2B_DESC_SIZE, \
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.statesize = BLAKE2B_STATE_SIZE, \
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}
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static struct shash_alg blake2b_algs[] = {
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BLAKE2B_ALG("blake2b-160", "blake2b-160-generic",
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BLAKE2B_160_HASH_SIZE),
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BLAKE2B_ALG("blake2b-256", "blake2b-256-generic",
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BLAKE2B_256_HASH_SIZE),
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BLAKE2B_ALG("blake2b-384", "blake2b-384-generic",
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BLAKE2B_384_HASH_SIZE),
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BLAKE2B_ALG("blake2b-512", "blake2b-512-generic",
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BLAKE2B_512_HASH_SIZE),
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};
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static int __init blake2b_mod_init(void)
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{
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return crypto_register_shashes(blake2b_algs, ARRAY_SIZE(blake2b_algs));
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}
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static void __exit blake2b_mod_fini(void)
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{
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crypto_unregister_shashes(blake2b_algs, ARRAY_SIZE(blake2b_algs));
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}
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module_init(blake2b_mod_init);
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module_exit(blake2b_mod_fini);
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MODULE_AUTHOR("David Sterba <kdave@kernel.org>");
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MODULE_DESCRIPTION("BLAKE2b generic implementation");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS_CRYPTO("blake2b-160");
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MODULE_ALIAS_CRYPTO("blake2b-160-generic");
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MODULE_ALIAS_CRYPTO("blake2b-256");
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MODULE_ALIAS_CRYPTO("blake2b-256-generic");
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MODULE_ALIAS_CRYPTO("blake2b-384");
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MODULE_ALIAS_CRYPTO("blake2b-384-generic");
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MODULE_ALIAS_CRYPTO("blake2b-512");
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MODULE_ALIAS_CRYPTO("blake2b-512-generic");
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@ -4332,6 +4332,7 @@ static const struct alg_test_desc alg_test_descs[] = {
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.fips_allowed = 1,
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}, {
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.alg = "blake2b-160",
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.generic_driver = "blake2b-160-lib",
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.test = alg_test_hash,
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.fips_allowed = 0,
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.suite = {
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@ -4339,6 +4340,7 @@ static const struct alg_test_desc alg_test_descs[] = {
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}
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}, {
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.alg = "blake2b-256",
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.generic_driver = "blake2b-256-lib",
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.test = alg_test_hash,
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.fips_allowed = 0,
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.suite = {
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@ -4346,6 +4348,7 @@ static const struct alg_test_desc alg_test_descs[] = {
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}
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}, {
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.alg = "blake2b-384",
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.generic_driver = "blake2b-384-lib",
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.test = alg_test_hash,
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.fips_allowed = 0,
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.suite = {
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@ -4353,6 +4356,7 @@ static const struct alg_test_desc alg_test_descs[] = {
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}
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}, {
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.alg = "blake2b-512",
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.generic_driver = "blake2b-512-lib",
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.test = alg_test_hash,
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.fips_allowed = 0,
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.suite = {
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@ -7,20 +7,10 @@
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#include <linux/types.h>
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#include <linux/string.h>
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struct blake2b_state {
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/* 'h', 't', and 'f' are used in assembly code, so keep them as-is. */
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u64 h[8];
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u64 t[2];
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/* The true state ends here. The rest is temporary storage. */
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u64 f[2];
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};
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enum blake2b_lengths {
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BLAKE2B_BLOCK_SIZE = 128,
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BLAKE2B_HASH_SIZE = 64,
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BLAKE2B_KEY_SIZE = 64,
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BLAKE2B_STATE_SIZE = offsetof(struct blake2b_state, f),
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BLAKE2B_DESC_SIZE = sizeof(struct blake2b_state),
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BLAKE2B_160_HASH_SIZE = 20,
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BLAKE2B_256_HASH_SIZE = 32,
|
||||
|
|
|
|||
|
|
@ -1,116 +0,0 @@
|
|||
/* SPDX-License-Identifier: GPL-2.0 OR MIT */
|
||||
/*
|
||||
* Helper functions for BLAKE2b implementations.
|
||||
* Keep this in sync with the corresponding BLAKE2s header.
|
||||
*/
|
||||
|
||||
#ifndef _CRYPTO_INTERNAL_BLAKE2B_H
|
||||
#define _CRYPTO_INTERNAL_BLAKE2B_H
|
||||
|
||||
#include <asm/byteorder.h>
|
||||
#include <crypto/blake2b.h>
|
||||
#include <crypto/internal/hash.h>
|
||||
#include <linux/array_size.h>
|
||||
#include <linux/compiler.h>
|
||||
#include <linux/build_bug.h>
|
||||
#include <linux/errno.h>
|
||||
#include <linux/math.h>
|
||||
#include <linux/string.h>
|
||||
#include <linux/types.h>
|
||||
|
||||
static inline void blake2b_set_lastblock(struct blake2b_state *state)
|
||||
{
|
||||
state->f[0] = -1;
|
||||
state->f[1] = 0;
|
||||
}
|
||||
|
||||
static inline void blake2b_set_nonlast(struct blake2b_state *state)
|
||||
{
|
||||
state->f[0] = 0;
|
||||
state->f[1] = 0;
|
||||
}
|
||||
|
||||
typedef void (*blake2b_compress_t)(struct blake2b_state *state,
|
||||
const u8 *block, size_t nblocks, u32 inc);
|
||||
|
||||
/* Helper functions for shash implementations of BLAKE2b */
|
||||
|
||||
struct blake2b_tfm_ctx {
|
||||
u8 key[BLAKE2B_BLOCK_SIZE];
|
||||
unsigned int keylen;
|
||||
};
|
||||
|
||||
static inline int crypto_blake2b_setkey(struct crypto_shash *tfm,
|
||||
const u8 *key, unsigned int keylen)
|
||||
{
|
||||
struct blake2b_tfm_ctx *tctx = crypto_shash_ctx(tfm);
|
||||
|
||||
if (keylen > BLAKE2B_KEY_SIZE)
|
||||
return -EINVAL;
|
||||
|
||||
BUILD_BUG_ON(BLAKE2B_KEY_SIZE > BLAKE2B_BLOCK_SIZE);
|
||||
|
||||
memcpy(tctx->key, key, keylen);
|
||||
memset(tctx->key + keylen, 0, BLAKE2B_BLOCK_SIZE - keylen);
|
||||
tctx->keylen = keylen;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline void __crypto_blake2b_init(struct blake2b_state *state,
|
||||
size_t outlen, size_t keylen)
|
||||
{
|
||||
state->h[0] = BLAKE2B_IV0 ^ (0x01010000 | keylen << 8 | outlen);
|
||||
state->h[1] = BLAKE2B_IV1;
|
||||
state->h[2] = BLAKE2B_IV2;
|
||||
state->h[3] = BLAKE2B_IV3;
|
||||
state->h[4] = BLAKE2B_IV4;
|
||||
state->h[5] = BLAKE2B_IV5;
|
||||
state->h[6] = BLAKE2B_IV6;
|
||||
state->h[7] = BLAKE2B_IV7;
|
||||
state->t[0] = 0;
|
||||
state->t[1] = 0;
|
||||
}
|
||||
|
||||
static inline int crypto_blake2b_init(struct shash_desc *desc)
|
||||
{
|
||||
const struct blake2b_tfm_ctx *tctx = crypto_shash_ctx(desc->tfm);
|
||||
struct blake2b_state *state = shash_desc_ctx(desc);
|
||||
unsigned int outlen = crypto_shash_digestsize(desc->tfm);
|
||||
|
||||
__crypto_blake2b_init(state, outlen, tctx->keylen);
|
||||
return tctx->keylen ?
|
||||
crypto_shash_update(desc, tctx->key, BLAKE2B_BLOCK_SIZE) : 0;
|
||||
}
|
||||
|
||||
static inline int crypto_blake2b_update_bo(struct shash_desc *desc,
|
||||
const u8 *in, unsigned int inlen,
|
||||
blake2b_compress_t compress)
|
||||
{
|
||||
struct blake2b_state *state = shash_desc_ctx(desc);
|
||||
|
||||
blake2b_set_nonlast(state);
|
||||
compress(state, in, inlen / BLAKE2B_BLOCK_SIZE, BLAKE2B_BLOCK_SIZE);
|
||||
return inlen - round_down(inlen, BLAKE2B_BLOCK_SIZE);
|
||||
}
|
||||
|
||||
static inline int crypto_blake2b_finup(struct shash_desc *desc, const u8 *in,
|
||||
unsigned int inlen, u8 *out,
|
||||
blake2b_compress_t compress)
|
||||
{
|
||||
struct blake2b_state *state = shash_desc_ctx(desc);
|
||||
u8 buf[BLAKE2B_BLOCK_SIZE];
|
||||
int i;
|
||||
|
||||
memcpy(buf, in, inlen);
|
||||
memset(buf + inlen, 0, BLAKE2B_BLOCK_SIZE - inlen);
|
||||
blake2b_set_lastblock(state);
|
||||
compress(state, buf, 1, inlen);
|
||||
for (i = 0; i < ARRAY_SIZE(state->h); i++)
|
||||
__cpu_to_le64s(&state->h[i]);
|
||||
memcpy(out, state->h, crypto_shash_digestsize(desc->tfm));
|
||||
memzero_explicit(buf, sizeof(buf));
|
||||
return 0;
|
||||
}
|
||||
|
||||
#endif /* _CRYPTO_INTERNAL_BLAKE2B_H */
|
||||
Loading…
Reference in New Issue