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40 lines
993 B
C
40 lines
993 B
C
// keccak.h
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// 19-Nov-11 Markku-Juhani O. Saarinen <mjos@iki.fi>
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#ifndef KECCAK_H
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#define KECCAK_H
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#include <stdint.h>
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#include <string.h>
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#ifndef KECCAK_ROUNDS
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#define KECCAK_ROUNDS 24
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#endif
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#ifndef ROTL64
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#define ROTL64(x, y) (((x) << (y)) | ((x) >> (64 - (y))))
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#endif
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// SHA3 Algorithm context.
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typedef struct KECCAK_CTX
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{
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// 1600 bits algorithm hashing state
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uint64_t hash[25];
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// 1088-bit buffer for leftovers, block size = 136 B for 256-bit keccak
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uint64_t message[17];
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// count of bytes in the message[] buffer
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size_t rest;
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} KECCAK_CTX;
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// compute a keccak hash (md) of given byte length from "in"
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void keccak(const uint8_t *in, size_t inlen, uint8_t *md, int mdlen);
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// update the state
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void keccakf(uint64_t st[25], int norounds);
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void keccak1600(const uint8_t *in, size_t inlen, uint8_t *md);
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void keccak_init(KECCAK_CTX * ctx);
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void keccak_update(KECCAK_CTX * ctx, const uint8_t *in, size_t inlen);
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void keccak_finish(KECCAK_CTX * ctx, uint8_t *md);
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#endif
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