1 /* 2 * SHA-384 hash implementation and interface functions 3 * Copyright (c) 2015, Pali Rohr <pali.rohar (at) 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 ===== */ 93
