4 * SHA-3, as specified in
5 * http://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.202.pdf
7 * SHA-3 code by Jeff Garzik <jeff@garzik.org>
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the Free
11 * Software Foundation; either version 2 of the License, or (at your option)•
22 #define KECCAK_ROUNDS 24
24 #define ROTL64(x, y) (((x) << (y)) | ((x) >> (64 - (y))))
26 static const uint64_t keccakf_rndc[24] = {
27 0x0000000000000001ULL, 0x0000000000008082ULL, 0x800000000000808aULL,
28 0x8000000080008000ULL, 0x000000000000808bULL, 0x0000000080000001ULL,
29 0x8000000080008081ULL, 0x8000000000008009ULL, 0x000000000000008aULL,
30 0x0000000000000088ULL, 0x0000000080008009ULL, 0x000000008000000aULL,
31 0x000000008000808bULL, 0x800000000000008bULL, 0x8000000000008089ULL,
32 0x8000000000008003ULL, 0x8000000000008002ULL, 0x8000000000000080ULL,
33 0x000000000000800aULL, 0x800000008000000aULL, 0x8000000080008081ULL,
34 0x8000000000008080ULL, 0x0000000080000001ULL, 0x8000000080008008ULL
37 static const int keccakf_rotc[24] = {
38 1, 3, 6, 10, 15, 21, 28, 36, 45, 55, 2, 14,
39 27, 41, 56, 8, 25, 43, 62, 18, 39, 61, 20, 44
42 static const int keccakf_piln[24] = {
43 10, 7, 11, 17, 18, 3, 5, 16, 8, 21, 24, 4,
44 15, 23, 19, 13, 12, 2, 20, 14, 22, 9, 6, 1
47 /* update the state with given number of rounds */
49 static void keccakf(uint64_t st[25])
54 for (round = 0; round < KECCAK_ROUNDS; round++) {
57 for (i = 0; i < 5; i++)
58 bc[i] = st[i] ^ st[i + 5] ^ st[i + 10] ^ st[i + 15]
61 for (i = 0; i < 5; i++) {
62 t = bc[(i + 4) % 5] ^ ROTL64(bc[(i + 1) % 5], 1);
63 for (j = 0; j < 25; j += 5)
69 for (i = 0; i < 24; i++) {
72 st[j] = ROTL64(t, keccakf_rotc[i]);
77 for (j = 0; j < 25; j += 5) {
78 for (i = 0; i < 5; i++)
80 for (i = 0; i < 5; i++)
81 st[j + i] ^= (~bc[(i + 1) % 5]) &
86 st[0] ^= keccakf_rndc[round];
90 static void fio_sha3_init(struct fio_sha3_ctx *sctx, unsigned int digest_sz)
92 memset(sctx->st, 0, sizeof(sctx->st));
93 sctx->md_len = digest_sz;
94 sctx->rsiz = 200 - 2 * digest_sz;
95 sctx->rsizw = sctx->rsiz / 8;
97 memset(sctx->buf, 0, sizeof(sctx->buf));
100 void fio_sha3_224_init(struct fio_sha3_ctx *sctx)
102 fio_sha3_init(sctx, SHA3_224_DIGEST_SIZE);
105 void fio_sha3_256_init(struct fio_sha3_ctx *sctx)
107 fio_sha3_init(sctx, SHA3_256_DIGEST_SIZE);
110 void fio_sha3_384_init(struct fio_sha3_ctx *sctx)
112 fio_sha3_init(sctx, SHA3_384_DIGEST_SIZE);
115 void fio_sha3_512_init(struct fio_sha3_ctx *sctx)
117 fio_sha3_init(sctx, SHA3_512_DIGEST_SIZE);
120 int fio_sha3_update(struct fio_sha3_ctx *sctx, const uint8_t *data,
129 if ((sctx->partial + len) > (sctx->rsiz - 1)) {
131 done = -sctx->partial;
132 memcpy(sctx->buf + sctx->partial, data,
140 for (i = 0; i < sctx->rsizw; i++)
141 sctx->st[i] ^= ((uint64_t *) src)[i];
146 } while (done + (sctx->rsiz - 1) < len);
150 memcpy(sctx->buf + sctx->partial, src, len - done);
151 sctx->partial += (len - done);
156 void fio_sha3_final(struct fio_sha3_ctx *sctx)
158 unsigned int i, inlen = sctx->partial;
160 sctx->buf[inlen++] = 0x06;
161 memset(sctx->buf + inlen, 0, sctx->rsiz - inlen);
162 sctx->buf[sctx->rsiz - 1] |= 0x80;
164 for (i = 0; i < sctx->rsizw; i++)
165 sctx->st[i] ^= ((uint64_t *) sctx->buf)[i];
169 for (i = 0; i < sctx->rsizw; i++)
170 sctx->st[i] = cpu_to_le64(sctx->st[i]);
172 memcpy(sctx->sha, sctx->st, sctx->md_len);