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https://github.com/edk2-porting/linux-next.git
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057edc9c8b
Move most of blake2s_update() and blake2s_final() into new inline functions __blake2s_update() and __blake2s_final() in include/crypto/internal/blake2s.h so that this logic can be shared by the shash helper functions. This will avoid duplicating this logic between the library and shash implementations. Signed-off-by: Eric Biggers <ebiggers@google.com> Acked-by: Ard Biesheuvel <ardb@kernel.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
93 lines
2.4 KiB
C
93 lines
2.4 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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* This is an implementation of the BLAKE2s hash and PRF functions.
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*
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* Information: https://blake2.net/
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*
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*/
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#include <crypto/internal/blake2s.h>
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#include <linux/types.h>
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#include <linux/string.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/bug.h>
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#if IS_ENABLED(CONFIG_CRYPTO_ARCH_HAVE_LIB_BLAKE2S)
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# define blake2s_compress blake2s_compress_arch
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#else
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# define blake2s_compress blake2s_compress_generic
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#endif
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void blake2s_update(struct blake2s_state *state, const u8 *in, size_t inlen)
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{
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__blake2s_update(state, in, inlen, blake2s_compress);
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}
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EXPORT_SYMBOL(blake2s_update);
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void blake2s_final(struct blake2s_state *state, u8 *out)
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{
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WARN_ON(IS_ENABLED(DEBUG) && !out);
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__blake2s_final(state, out, blake2s_compress);
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memzero_explicit(state, sizeof(*state));
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}
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EXPORT_SYMBOL(blake2s_final);
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void blake2s256_hmac(u8 *out, const u8 *in, const u8 *key, const size_t inlen,
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const size_t keylen)
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{
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struct blake2s_state state;
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u8 x_key[BLAKE2S_BLOCK_SIZE] __aligned(__alignof__(u32)) = { 0 };
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u8 i_hash[BLAKE2S_HASH_SIZE] __aligned(__alignof__(u32));
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int i;
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if (keylen > BLAKE2S_BLOCK_SIZE) {
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blake2s_init(&state, BLAKE2S_HASH_SIZE);
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blake2s_update(&state, key, keylen);
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blake2s_final(&state, x_key);
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} else
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memcpy(x_key, key, keylen);
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for (i = 0; i < BLAKE2S_BLOCK_SIZE; ++i)
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x_key[i] ^= 0x36;
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blake2s_init(&state, BLAKE2S_HASH_SIZE);
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blake2s_update(&state, x_key, BLAKE2S_BLOCK_SIZE);
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blake2s_update(&state, in, inlen);
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blake2s_final(&state, i_hash);
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for (i = 0; i < BLAKE2S_BLOCK_SIZE; ++i)
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x_key[i] ^= 0x5c ^ 0x36;
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blake2s_init(&state, BLAKE2S_HASH_SIZE);
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blake2s_update(&state, x_key, BLAKE2S_BLOCK_SIZE);
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blake2s_update(&state, i_hash, BLAKE2S_HASH_SIZE);
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blake2s_final(&state, i_hash);
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memcpy(out, i_hash, BLAKE2S_HASH_SIZE);
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memzero_explicit(x_key, BLAKE2S_BLOCK_SIZE);
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memzero_explicit(i_hash, BLAKE2S_HASH_SIZE);
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}
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EXPORT_SYMBOL(blake2s256_hmac);
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static int __init mod_init(void)
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{
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if (!IS_ENABLED(CONFIG_CRYPTO_MANAGER_DISABLE_TESTS) &&
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WARN_ON(!blake2s_selftest()))
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return -ENODEV;
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return 0;
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}
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static void __exit mod_exit(void)
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{
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}
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module_init(mod_init);
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module_exit(mod_exit);
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MODULE_LICENSE("GPL v2");
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MODULE_DESCRIPTION("BLAKE2s hash function");
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MODULE_AUTHOR("Jason A. Donenfeld <Jason@zx2c4.com>");
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