1 /* 2 * SHA-512 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 "sha512_i.h" 13 #include "crypto.h" 14 15 16 /** 17 * sha512_vector - SHA512 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 sha512_vector(size_t num_elem, const u8 *addr[], const size_t *len, 25 u8 *mac) 26 { 27 struct sha512_state ctx; 28 size_t i; 29 30 sha512_init(&ctx); 31 for (i = 0; i < num_elem; i++) 32 if (sha512_process(&ctx, addr[i], len[i])) 33 return -1; 34 if (sha512_done(&ctx, mac)) 35 return -1; 36 return 0; 37 } 38 39 40 /* ===== start - public domain SHA512 implementation ===== */ 41 42 /* This is based on SHA512 implementation in LibTomCrypt that was released into 43 * public domain by Tom St Denis. */ 44 45 #define CONST64(n) n ## ULL 46 47 /* the K array */ 48 static const u64 K[80] = { 49 CONST64(0x428a2f98d728ae22), CONST64(0x7137449123ef65cd), 50 CONST64(0xb5c0fbcfec4d3b2f), CONST64(0xe9b5dba58189dbbc), 51 CONST64(0x3956c25bf348b538), CONST64(0x59f111f1b605d019), 52 CONST64(0x923f82a4af194f9b), CONST64(0xab1c5ed5da6d8118), 53 CONST64(0xd807aa98a3030242), CONST64(0x12835b0145706fbe), 54 CONST64(0x243185be4ee4b28c), CONST64(0x550c7dc3d5ffb4e2), 55 CONST64(0x72be5d74f27b896f), CONST64(0x80deb1fe3b1696b1), 56 CONST64(0x9bdc06a725c71235), CONST64(0xc19bf174cf692694), 57 CONST64(0xe49b69c19ef14ad2), CONST64(0xefbe4786384f25e3), 58 CONST64(0x0fc19dc68b8cd5b5), CONST64(0x240ca1cc77ac9c65), 59 CONST64(0x2de92c6f592b0275), CONST64(0x4a7484aa6ea6e483), 60 CONST64(0x5cb0a9dcbd41fbd4), CONST64(0x76f988da831153b5), 61 CONST64(0x983e5152ee66dfab), CONST64(0xa831c66d2db43210), 62 CONST64(0xb00327c898fb213f), CONST64(0xbf597fc7beef0ee4), 63 CONST64(0xc6e00bf33da88fc2), CONST64(0xd5a79147930aa725), 64 CONST64(0x06ca6351e003826f), CONST64(0x142929670a0e6e70), 65 CONST64(0x27b70a8546d22ffc), CONST64(0x2e1b21385c26c926), 66 CONST64(0x4d2c6dfc5ac42aed), CONST64(0x53380d139d95b3df), 67 CONST64(0x650a73548baf63de), CONST64(0x766a0abb3c77b2a8), 68 CONST64(0x81c2c92e47edaee6), CONST64(0x92722c851482353b), 69 CONST64(0xa2bfe8a14cf10364), CONST64(0xa81a664bbc423001), 70 CONST64(0xc24b8b70d0f89791), CONST64(0xc76c51a30654be30), 71 CONST64(0xd192e819d6ef5218), CONST64(0xd69906245565a910), 72 CONST64(0xf40e35855771202a), CONST64(0x106aa07032bbd1b8), 73 CONST64(0x19a4c116b8d2d0c8), CONST64(0x1e376c085141ab53), 74 CONST64(0x2748774cdf8eeb99), CONST64(0x34b0bcb5e19b48a8), 75 CONST64(0x391c0cb3c5c95a63), CONST64(0x4ed8aa4ae3418acb), 76 CONST64(0x5b9cca4f7763e373), CONST64(0x682e6ff3d6b2b8a3), 77 CONST64(0x748f82ee5defb2fc), CONST64(0x78a5636f43172f60), 78 CONST64(0x84c87814a1f0ab72), CONST64(0x8cc702081a6439ec), 79 CONST64(0x90befffa23631e28), CONST64(0xa4506cebde82bde9), 80 CONST64(0xbef9a3f7b2c67915), CONST64(0xc67178f2e372532b), 81 CONST64(0xca273eceea26619c), CONST64(0xd186b8c721c0c207), 82 CONST64(0xeada7dd6cde0eb1e), CONST64(0xf57d4f7fee6ed178), 83 CONST64(0x06f067aa72176fba), CONST64(0x0a637dc5a2c898a6), 84 CONST64(0x113f9804bef90dae), CONST64(0x1b710b35131c471b), 85 CONST64(0x28db77f523047d84), CONST64(0x32caab7b40c72493), 86 CONST64(0x3c9ebe0a15c9bebc), CONST64(0x431d67c49c100d4c), 87 CONST64(0x4cc5d4becb3e42b6), CONST64(0x597f299cfc657e2a), 88 CONST64(0x5fcb6fab3ad6faec), CONST64(0x6c44198c4a475817) 89 }; 90 91 /* Various logical functions */ 92 #define Ch(x,y,z) (z ^ (x & (y ^ z))) 93 #define Maj(x,y,z) (((x | y) & z) | (x & y)) 94 #define S(x, n) ROR64c(x, n) 95 #define R(x, n) (((x) & CONST64(0xFFFFFFFFFFFFFFFF)) >> ((u64) n)) 96 #define Sigma0(x) (S(x, 28) ^ S(x, 34) ^ S(x, 39)) 97 #define Sigma1(x) (S(x, 14) ^ S(x, 18) ^ S(x, 41)) 98 #define Gamma0(x) (S(x, 1) ^ S(x, 8) ^ R(x, 7)) 99 #define Gamma1(x) (S(x, 19) ^ S(x, 61) ^ R(x, 6)) 100 #ifndef MIN 101 #define MIN(x, y) (((x) < (y)) ? (x) : (y)) 102 #endif 103 104 #define ROR64c(x, y) \ 105 ( ((((x) & CONST64(0xFFFFFFFFFFFFFFFF)) >> ((u64) (y) & CONST64(63))) | \ 106 ((x) << ((u64) (64 - ((y) & CONST64(63)))))) & \ 107 CONST64(0xFFFFFFFFFFFFFFFF)) 108 109 /* compress 1024-bits */ 110 static int sha512_compress(struct sha512_state *md, unsigned char *buf) 111 { 112 u64 S[8], W[80], t0, t1; 113 int i; 114 115 /* copy state into S */ 116 for (i = 0; i < 8; i++) { 117 S[i] = md->state[i]; 118 } 119 120 /* copy the state into 1024-bits into W[0..15] */ 121 for (i = 0; i < 16; i++) 122 W[i] = WPA_GET_BE64(buf + (8 * i)); 123 124 /* fill W[16..79] */ 125 for (i = 16; i < 80; i++) { 126 W[i] = Gamma1(W[i - 2]) + W[i - 7] + Gamma0(W[i - 15]) + 127 W[i - 16]; 128 } 129 130 /* Compress */ 131 for (i = 0; i < 80; i++) { 132 t0 = S[7] + Sigma1(S[4]) + Ch(S[4], S[5], S[6]) + K[i] + W[i]; 133 t1 = Sigma0(S[0]) + Maj(S[0], S[1], S[2]); 134 S[7] = S[6]; 135 S[6] = S[5]; 136 S[5] = S[4]; 137 S[4] = S[3] + t0; 138 S[3] = S[2]; 139 S[2] = S[1]; 140 S[1] = S[0]; 141 S[0] = t0 + t1; 142 } 143 144 /* feedback */ 145 for (i = 0; i < 8; i++) { 146 md->state[i] = md->state[i] + S[i]; 147 } 148 149 return 0; 150 } 151 152 153 /** 154 Initialize the hash state 155 @param md The hash state you wish to initialize 156 @return CRYPT_OK if successful 157 */ 158 void sha512_init(struct sha512_state *md) 159 { 160 md->curlen = 0; 161 md->length = 0; 162 md->state[0] = CONST64(0x6a09e667f3bcc908); 163 md->state[1] = CONST64(0xbb67ae8584caa73b); 164 md->state[2] = CONST64(0x3c6ef372fe94f82b); 165 md->state[3] = CONST64(0xa54ff53a5f1d36f1); 166 md->state[4] = CONST64(0x510e527fade682d1); 167 md->state[5] = CONST64(0x9b05688c2b3e6c1f); 168 md->state[6] = CONST64(0x1f83d9abfb41bd6b); 169 md->state[7] = CONST64(0x5be0cd19137e2179); 170 } 171 172 173 /** 174 Process a block of memory though the hash 175 @param md The hash state 176 @param in The data to hash 177 @param inlen The length of the data (octets) 178 @return CRYPT_OK if successful 179 */ 180 int sha512_process(struct sha512_state *md, const unsigned char *in, 181 unsigned long inlen) 182 { 183 unsigned long n; 184 185 if (md->curlen >= sizeof(md->buf)) 186 return -1; 187 188 while (inlen > 0) { 189 if (md->curlen == 0 && inlen >= SHA512_BLOCK_SIZE) { 190 if (sha512_compress(md, (unsigned char *) in) < 0) 191 return -1; 192 md->length += SHA512_BLOCK_SIZE * 8; 193 in += SHA512_BLOCK_SIZE; 194 inlen -= SHA512_BLOCK_SIZE; 195 } else { 196 n = MIN(inlen, (SHA512_BLOCK_SIZE - md->curlen)); 197 os_memcpy(md->buf + md->curlen, in, n); 198 md->curlen += n; 199 in += n; 200 inlen -= n; 201 if (md->curlen == SHA512_BLOCK_SIZE) { 202 if (sha512_compress(md, md->buf) < 0) 203 return -1; 204 md->length += 8 * SHA512_BLOCK_SIZE; 205 md->curlen = 0; 206 } 207 } 208 } 209 210 return 0; 211 } 212 213 214 /** 215 Terminate the hash to get the digest 216 @param md The hash state 217 @param out [out] The destination of the hash (64 bytes) 218 @return CRYPT_OK if successful 219 */ 220 int sha512_done(struct sha512_state *md, unsigned char *out) 221 { 222 int i; 223 224 if (md->curlen >= sizeof(md->buf)) 225 return -1; 226 227 /* increase the length of the message */ 228 md->length += md->curlen * CONST64(8); 229 230 /* append the '1' bit */ 231 md->buf[md->curlen++] = (unsigned char) 0x80; 232 233 /* if the length is currently above 112 bytes we append zeros 234 * then compress. Then we can fall back to padding zeros and length 235 * encoding like normal. 236 */ 237 if (md->curlen > 112) { 238 while (md->curlen < 128) { 239 md->buf[md->curlen++] = (unsigned char) 0; 240 } 241 sha512_compress(md, md->buf); 242 md->curlen = 0; 243 } 244 245 /* pad up to 120 bytes of zeroes 246 * note: that from 112 to 120 is the 64 MSB of the length. We assume 247 * that you won't hash > 2^64 bits of data... :-) 248 */ 249 while (md->curlen < 120) { 250 md->buf[md->curlen++] = (unsigned char) 0; 251 } 252 253 /* store length */ 254 WPA_PUT_BE64(md->buf + 120, md->length); 255 sha512_compress(md, md->buf); 256 257 /* copy output */ 258 for (i = 0; i < 8; i++) 259 WPA_PUT_BE64(out + (8 * i), md->state[i]); 260 261 return 0; 262 } 263 264 /* ===== end - public domain SHA512 implementation ===== */ 265