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107 lines
2.7 KiB
107 lines
2.7 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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#ifndef _CRYPTO_BLAKE2S_H |
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#define _CRYPTO_BLAKE2S_H |
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#include <linux/bug.h> |
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#include <linux/types.h> |
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#include <linux/kernel.h> |
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#include <linux/string.h> |
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enum blake2s_lengths { |
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BLAKE2S_BLOCK_SIZE = 64, |
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BLAKE2S_HASH_SIZE = 32, |
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BLAKE2S_KEY_SIZE = 32, |
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BLAKE2S_128_HASH_SIZE = 16, |
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BLAKE2S_160_HASH_SIZE = 20, |
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BLAKE2S_224_HASH_SIZE = 28, |
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BLAKE2S_256_HASH_SIZE = 32, |
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}; |
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struct blake2s_state { |
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/* 'h', 't', and 'f' are used in assembly code, so keep them as-is. */ |
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u32 h[8]; |
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u32 t[2]; |
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u32 f[2]; |
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u8 buf[BLAKE2S_BLOCK_SIZE]; |
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unsigned int buflen; |
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unsigned int outlen; |
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}; |
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enum blake2s_iv { |
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BLAKE2S_IV0 = 0x6A09E667UL, |
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BLAKE2S_IV1 = 0xBB67AE85UL, |
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BLAKE2S_IV2 = 0x3C6EF372UL, |
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BLAKE2S_IV3 = 0xA54FF53AUL, |
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BLAKE2S_IV4 = 0x510E527FUL, |
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BLAKE2S_IV5 = 0x9B05688CUL, |
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BLAKE2S_IV6 = 0x1F83D9ABUL, |
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BLAKE2S_IV7 = 0x5BE0CD19UL, |
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}; |
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static inline void __blake2s_init(struct blake2s_state *state, size_t outlen, |
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const void *key, size_t keylen) |
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{ |
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state->h[0] = BLAKE2S_IV0 ^ (0x01010000 | keylen << 8 | outlen); |
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state->h[1] = BLAKE2S_IV1; |
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state->h[2] = BLAKE2S_IV2; |
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state->h[3] = BLAKE2S_IV3; |
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state->h[4] = BLAKE2S_IV4; |
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state->h[5] = BLAKE2S_IV5; |
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state->h[6] = BLAKE2S_IV6; |
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state->h[7] = BLAKE2S_IV7; |
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state->t[0] = 0; |
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state->t[1] = 0; |
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state->f[0] = 0; |
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state->f[1] = 0; |
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state->buflen = 0; |
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state->outlen = outlen; |
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if (keylen) { |
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memcpy(state->buf, key, keylen); |
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memset(&state->buf[keylen], 0, BLAKE2S_BLOCK_SIZE - keylen); |
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state->buflen = BLAKE2S_BLOCK_SIZE; |
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} |
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} |
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static inline void blake2s_init(struct blake2s_state *state, |
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const size_t outlen) |
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{ |
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__blake2s_init(state, outlen, NULL, 0); |
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} |
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static inline void blake2s_init_key(struct blake2s_state *state, |
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const size_t outlen, const void *key, |
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const size_t keylen) |
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{ |
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WARN_ON(IS_ENABLED(DEBUG) && (!outlen || outlen > BLAKE2S_HASH_SIZE || |
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!key || !keylen || keylen > BLAKE2S_KEY_SIZE)); |
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__blake2s_init(state, outlen, key, keylen); |
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} |
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void blake2s_update(struct blake2s_state *state, const u8 *in, size_t inlen); |
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void blake2s_final(struct blake2s_state *state, u8 *out); |
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static inline void blake2s(u8 *out, const u8 *in, const u8 *key, |
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const size_t outlen, 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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WARN_ON(IS_ENABLED(DEBUG) && ((!in && inlen > 0) || !out || !outlen || |
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outlen > BLAKE2S_HASH_SIZE || keylen > BLAKE2S_KEY_SIZE || |
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(!key && keylen))); |
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__blake2s_init(&state, outlen, key, keylen); |
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blake2s_update(&state, in, inlen); |
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blake2s_final(&state, out); |
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} |
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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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#endif /* _CRYPTO_BLAKE2S_H */
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