| Dmitry Shmidt | d7ff03d | 2015-12-04 14:49:35 -0800 | [diff] [blame] | 1 | /* |
| 2 | * SHA-384 hash implementation and interface functions |
| 3 | * Copyright (c) 2015, Pali Rohár <pali.rohar@gmail.com> |
| 4 | * |
| 5 | * This software may be distributed under the terms of the BSD license. |
| 6 | * See README for more details. |
| 7 | */ |
| 8 | |
| 9 | #include "includes.h" |
| 10 | |
| 11 | #include "common.h" |
| 12 | #include "sha384_i.h" |
| 13 | #include "crypto.h" |
| 14 | |
| 15 | |
| 16 | /** |
| 17 | * sha384_vector - SHA384 hash for data vector |
| 18 | * @num_elem: Number of elements in the data vector |
| 19 | * @addr: Pointers to the data areas |
| 20 | * @len: Lengths of the data blocks |
| 21 | * @mac: Buffer for the hash |
| 22 | * Returns: 0 on success, -1 of failure |
| 23 | */ |
| 24 | int sha384_vector(size_t num_elem, const u8 *addr[], const size_t *len, |
| 25 | u8 *mac) |
| 26 | { |
| 27 | struct sha384_state ctx; |
| 28 | size_t i; |
| 29 | |
| 30 | sha384_init(&ctx); |
| 31 | for (i = 0; i < num_elem; i++) |
| 32 | if (sha384_process(&ctx, addr[i], len[i])) |
| 33 | return -1; |
| 34 | if (sha384_done(&ctx, mac)) |
| 35 | return -1; |
| 36 | return 0; |
| 37 | } |
| 38 | |
| 39 | |
| 40 | /* ===== start - public domain SHA384 implementation ===== */ |
| 41 | |
| 42 | /* This is based on SHA384 implementation in LibTomCrypt that was released into |
| 43 | * public domain by Tom St Denis. */ |
| 44 | |
| 45 | #define CONST64(n) n ## ULL |
| 46 | |
| 47 | /** |
| 48 | Initialize the hash state |
| 49 | @param md The hash state you wish to initialize |
| 50 | @return CRYPT_OK if successful |
| 51 | */ |
| 52 | void sha384_init(struct sha384_state *md) |
| 53 | { |
| 54 | md->curlen = 0; |
| 55 | md->length = 0; |
| 56 | md->state[0] = CONST64(0xcbbb9d5dc1059ed8); |
| 57 | md->state[1] = CONST64(0x629a292a367cd507); |
| 58 | md->state[2] = CONST64(0x9159015a3070dd17); |
| 59 | md->state[3] = CONST64(0x152fecd8f70e5939); |
| 60 | md->state[4] = CONST64(0x67332667ffc00b31); |
| 61 | md->state[5] = CONST64(0x8eb44a8768581511); |
| 62 | md->state[6] = CONST64(0xdb0c2e0d64f98fa7); |
| 63 | md->state[7] = CONST64(0x47b5481dbefa4fa4); |
| 64 | } |
| 65 | |
| 66 | int sha384_process(struct sha384_state *md, const unsigned char *in, |
| 67 | unsigned long inlen) |
| 68 | { |
| 69 | return sha512_process(md, in, inlen); |
| 70 | } |
| 71 | |
| 72 | /** |
| 73 | Terminate the hash to get the digest |
| 74 | @param md The hash state |
| 75 | @param out [out] The destination of the hash (48 bytes) |
| 76 | @return CRYPT_OK if successful |
| 77 | */ |
| 78 | int sha384_done(struct sha384_state *md, unsigned char *out) |
| 79 | { |
| 80 | unsigned char buf[64]; |
| 81 | |
| 82 | if (md->curlen >= sizeof(md->buf)) |
| 83 | return -1; |
| 84 | |
| 85 | if (sha512_done(md, buf) != 0) |
| 86 | return -1; |
| 87 | |
| 88 | os_memcpy(out, buf, 48); |
| 89 | return 0; |
| 90 | } |
| 91 | |
| 92 | /* ===== end - public domain SHA384 implementation ===== */ |