3 * Copyright 2005,2007,2009 Colin Percival
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 #include "crypto_auth_hmacsha512.h"
31 #include "crypto_hash_sha512.h"
34 #include <sys/types.h>
40 crypto_auth_hmacsha512_init(crypto_auth_hmacsha512_state *state,
41 const unsigned char *key,
44 unsigned char pad[128];
45 unsigned char khash[64];
49 crypto_hash_sha512_init(&state->ictx);
50 crypto_hash_sha512_update(&state->ictx, key, keylen);
51 crypto_hash_sha512_final(&state->ictx, khash);
55 crypto_hash_sha512_init(&state->ictx);
56 memset(pad, 0x36, 128);
57 for (i = 0; i < keylen; i++) {
60 crypto_hash_sha512_update(&state->ictx, pad, 128);
62 crypto_hash_sha512_init(&state->octx);
63 memset(pad, 0x5c, 128);
64 for (i = 0; i < keylen; i++) {
67 crypto_hash_sha512_update(&state->octx, pad, 128);
69 sodium_memzero((void *) khash, sizeof khash);
75 crypto_auth_hmacsha512_update(crypto_auth_hmacsha512_state *state,
76 const unsigned char *in,
77 unsigned long long inlen)
79 crypto_hash_sha512_update(&state->ictx, in, inlen);
85 crypto_auth_hmacsha512_final(crypto_auth_hmacsha512_state *state,
88 unsigned char ihash[64];
90 crypto_hash_sha512_final(&state->ictx, ihash);
91 crypto_hash_sha512_update(&state->octx, ihash, 64);
92 crypto_hash_sha512_final(&state->octx, out);
94 sodium_memzero((void *) ihash, sizeof ihash);
100 crypto_auth(unsigned char *out, const unsigned char *in,
101 unsigned long long inlen, const unsigned char *k)
103 crypto_auth_hmacsha512_state state;
105 crypto_auth_hmacsha512_init(&state, k, crypto_auth_KEYBYTES);
106 crypto_auth_hmacsha512_update(&state, in, inlen);
107 crypto_auth_hmacsha512_final(&state, out);