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92 lines
2.4 KiB
92 lines
2.4 KiB
// SPDX-License-Identifier: GPL-2.0 OR MIT |
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/* |
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* Copyright (C) 2015-2019 Jason A. Donenfeld <[email protected]>. 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 <[email protected]>");
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