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56 lines
1.3 KiB
C
56 lines
1.3 KiB
C
// sha3.h
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// 19-Nov-11 Markku-Juhani O. Saarinen <mjos@iki.fi>
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#ifndef SHA3_H
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#define SHA3_H
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#include <stddef.h>
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#include <stdint.h>
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#if defined(__cplusplus)
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extern "C" {
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#endif
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#ifndef KECCAKF_ROUNDS
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#define KECCAKF_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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// state context
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typedef struct {
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union { // state:
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uint8_t b[200]; // 8-bit bytes
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uint64_t q[25]; // 64-bit words
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} st;
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int pt, rsiz, mdlen; // these don't overflow
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} sha3_ctx_t;
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// Compression function.
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void sha3_keccakf(uint64_t st[25]);
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// OpenSSL - like interfece
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int sha3_init(sha3_ctx_t *c, int mdlen); // mdlen = hash output in bytes
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int sha3_update(sha3_ctx_t *c, const void *data, size_t len);
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int sha3_final(void *md, sha3_ctx_t *c); // digest goes to md
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// compute a sha3 hash (md) of given byte length from "in"
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void *sha3(const void *in, size_t inlen, void *md, int mdlen);
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// SHAKE128 and SHAKE256 extensible-output functions
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#define shake128_init(c) sha3_init(c, 16)
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#define shake256_init(c) sha3_init(c, 32)
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#define shake_update sha3_update
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void shake_xof(sha3_ctx_t *c);
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void shake_out(sha3_ctx_t *c, void *out, size_t len);
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#if defined(__cplusplus)
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}
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#endif
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#endif
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