67 lines
1.6 KiB
C
67 lines
1.6 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 OR MIT */
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#ifndef _CRYPTO_BLAKE2B_H
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#define _CRYPTO_BLAKE2B_H
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#include <linux/bug.h>
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#include <linux/types.h>
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#include <linux/string.h>
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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_160_HASH_SIZE = 20,
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BLAKE2B_256_HASH_SIZE = 32,
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BLAKE2B_384_HASH_SIZE = 48,
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BLAKE2B_512_HASH_SIZE = 64,
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};
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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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u64 f[2];
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u8 buf[BLAKE2B_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 blake2b_iv {
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BLAKE2B_IV0 = 0x6A09E667F3BCC908ULL,
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BLAKE2B_IV1 = 0xBB67AE8584CAA73BULL,
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BLAKE2B_IV2 = 0x3C6EF372FE94F82BULL,
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BLAKE2B_IV3 = 0xA54FF53A5F1D36F1ULL,
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BLAKE2B_IV4 = 0x510E527FADE682D1ULL,
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BLAKE2B_IV5 = 0x9B05688C2B3E6C1FULL,
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BLAKE2B_IV6 = 0x1F83D9ABFB41BD6BULL,
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BLAKE2B_IV7 = 0x5BE0CD19137E2179ULL,
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};
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static inline void __blake2b_init(struct blake2b_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] = BLAKE2B_IV0 ^ (0x01010000 | keylen << 8 | outlen);
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state->h[1] = BLAKE2B_IV1;
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state->h[2] = BLAKE2B_IV2;
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state->h[3] = BLAKE2B_IV3;
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state->h[4] = BLAKE2B_IV4;
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state->h[5] = BLAKE2B_IV5;
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state->h[6] = BLAKE2B_IV6;
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state->h[7] = BLAKE2B_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, BLAKE2B_BLOCK_SIZE - keylen);
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state->buflen = BLAKE2B_BLOCK_SIZE;
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}
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}
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#endif /* _CRYPTO_BLAKE2B_H */
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