tsha512.c - synk - synchronize files between hosts
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tsha512.c (9743B)
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1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis
2 *
3 * LibTomCrypt is a library that provides various cryptographic
4 * algorithms in a highly modular and flexible manner.
5 *
6 * The library is free for all purposes without any express
7 * guarantee it works.
8 *
9 * Tom St Denis, tomstdenis@gmail.com, http://libtom.org
10 */
11 #include <stdint.h>
12
13 #include "sha512.h"
14
15 /* the K array */
16 static const uint64_t K[80] = {
17 UINT64_C(0x428a2f98d728ae22), UINT64_C(0x7137449123ef65cd),
18 UINT64_C(0xb5c0fbcfec4d3b2f), UINT64_C(0xe9b5dba58189dbbc),
19 UINT64_C(0x3956c25bf348b538), UINT64_C(0x59f111f1b605d019),
20 UINT64_C(0x923f82a4af194f9b), UINT64_C(0xab1c5ed5da6d8118),
21 UINT64_C(0xd807aa98a3030242), UINT64_C(0x12835b0145706fbe),
22 UINT64_C(0x243185be4ee4b28c), UINT64_C(0x550c7dc3d5ffb4e2),
23 UINT64_C(0x72be5d74f27b896f), UINT64_C(0x80deb1fe3b1696b1),
24 UINT64_C(0x9bdc06a725c71235), UINT64_C(0xc19bf174cf692694),
25 UINT64_C(0xe49b69c19ef14ad2), UINT64_C(0xefbe4786384f25e3),
26 UINT64_C(0x0fc19dc68b8cd5b5), UINT64_C(0x240ca1cc77ac9c65),
27 UINT64_C(0x2de92c6f592b0275), UINT64_C(0x4a7484aa6ea6e483),
28 UINT64_C(0x5cb0a9dcbd41fbd4), UINT64_C(0x76f988da831153b5),
29 UINT64_C(0x983e5152ee66dfab), UINT64_C(0xa831c66d2db43210),
30 UINT64_C(0xb00327c898fb213f), UINT64_C(0xbf597fc7beef0ee4),
31 UINT64_C(0xc6e00bf33da88fc2), UINT64_C(0xd5a79147930aa725),
32 UINT64_C(0x06ca6351e003826f), UINT64_C(0x142929670a0e6e70),
33 UINT64_C(0x27b70a8546d22ffc), UINT64_C(0x2e1b21385c26c926),
34 UINT64_C(0x4d2c6dfc5ac42aed), UINT64_C(0x53380d139d95b3df),
35 UINT64_C(0x650a73548baf63de), UINT64_C(0x766a0abb3c77b2a8),
36 UINT64_C(0x81c2c92e47edaee6), UINT64_C(0x92722c851482353b),
37 UINT64_C(0xa2bfe8a14cf10364), UINT64_C(0xa81a664bbc423001),
38 UINT64_C(0xc24b8b70d0f89791), UINT64_C(0xc76c51a30654be30),
39 UINT64_C(0xd192e819d6ef5218), UINT64_C(0xd69906245565a910),
40 UINT64_C(0xf40e35855771202a), UINT64_C(0x106aa07032bbd1b8),
41 UINT64_C(0x19a4c116b8d2d0c8), UINT64_C(0x1e376c085141ab53),
42 UINT64_C(0x2748774cdf8eeb99), UINT64_C(0x34b0bcb5e19b48a8),
43 UINT64_C(0x391c0cb3c5c95a63), UINT64_C(0x4ed8aa4ae3418acb),
44 UINT64_C(0x5b9cca4f7763e373), UINT64_C(0x682e6ff3d6b2b8a3),
45 UINT64_C(0x748f82ee5defb2fc), UINT64_C(0x78a5636f43172f60),
46 UINT64_C(0x84c87814a1f0ab72), UINT64_C(0x8cc702081a6439ec),
47 UINT64_C(0x90befffa23631e28), UINT64_C(0xa4506cebde82bde9),
48 UINT64_C(0xbef9a3f7b2c67915), UINT64_C(0xc67178f2e372532b),
49 UINT64_C(0xca273eceea26619c), UINT64_C(0xd186b8c721c0c207),
50 UINT64_C(0xeada7dd6cde0eb1e), UINT64_C(0xf57d4f7fee6ed178),
51 UINT64_C(0x06f067aa72176fba), UINT64_C(0x0a637dc5a2c898a6),
52 UINT64_C(0x113f9804bef90dae), UINT64_C(0x1b710b35131c471b),
53 UINT64_C(0x28db77f523047d84), UINT64_C(0x32caab7b40c72493),
54 UINT64_C(0x3c9ebe0a15c9bebc), UINT64_C(0x431d67c49c100d4c),
55 UINT64_C(0x4cc5d4becb3e42b6), UINT64_C(0x597f299cfc657e2a),
56 UINT64_C(0x5fcb6fab3ad6faec), UINT64_C(0x6c44198c4a475817)
57 };
58
59 /* Various logical functions */
60 #define STORE64H(x, y) \
61 { (y)[0] = (unsigned char)(((x)>>56)&255); (y)[1] = (unsigned char)(((x)>>48)&255); \
62 (y)[2] = (unsigned char)(((x)>>40)&255); (y)[3] = (unsigned char)(((x)>>32)&255); \
63 (y)[4] = (unsigned char)(((x)>>24)&255); (y)[5] = (unsigned char)(((x)>>16)&255); \
64 (y)[6] = (unsigned char)(((x)>>8)&255); (y)[7] = (unsigned char)((x)&255); }
65
66 #define LOAD64H(x, y) \
67 { x = (((uint64_t)((y)[0] & 255))<<56)|(((uint64_t)((y)[1] & 255))<<48) | \
68 (((uint64_t)((y)[2] & 255))<<40)|(((uint64_t)((y)[3] & 255))<<32) | \
69 (((uint64_t)((y)[4] & 255))<<24)|(((uint64_t)((y)[5] & 255))<<16) | \
70 (((uint64_t)((y)[6] & 255))<<8)|(((uint64_t)((y)[7] & 255))); }
71
72 #define ROR64c(x, y) \
73 ( ((((x)&UINT64_C(0xFFFFFFFFFFFFFFFF))>>((uint64_t)(y)&UINT64_C(63))) | \
74 ((x)<<((uint64_t)(64-((y)&UINT64_C(63)))))) & UINT64_C(0xFFFFFFFFFFFFFFFF))
75
76 #define Ch(x,y,z) (z ^ (x & (y ^ z)))
77 #define Maj(x,y,z) (((x | y) & z) | (x & y))
78 #define S(x, n) ROR64c(x, n)
79 #define R(x, n) (((x)&UINT64_C(0xFFFFFFFFFFFFFFFF))>>((uint64_t)n))
80 #define Sigma0(x) (S(x, 28) ^ S(x, 34) ^ S(x, 39))
81 #define Sigma1(x) (S(x, 14) ^ S(x, 18) ^ S(x, 41))
82 #define Gamma0(x) (S(x, 1) ^ S(x, 8) ^ R(x, 7))
83 #define Gamma1(x) (S(x, 19) ^ S(x, 61) ^ R(x, 6))
84 #ifndef MIN
85 #define MIN(x, y) ( ((x)<(y))?(x):(y) )
86 #endif
87
88 /* compress 1024-bits */
89 static int sha512_compress(sha512_state * md, unsigned char *buf)
90 {
91 uint64_t S[8], W[80], t0, t1;
92 int i;
93
94 /* copy state into S */
95 for (i = 0; i < 8; i++) {
96 S[i] = md->state[i];
97 }
98
99 /* copy the state into 1024-bits into W[0..15] */
100 for (i = 0; i < 16; i++) {
101 LOAD64H(W[i], buf + (8*i));
102 }
103
104 /* fill W[16..79] */
105 for (i = 16; i < 80; i++) {
106 W[i] = Gamma1(W[i - 2]) + W[i - 7] + Gamma0(W[i - 15]) + W[i - 16];
107 }
108
109 /* Compress */
110 for (i = 0; i < 80; i++) {
111 t0 = S[7] + Sigma1(S[4]) + Ch(S[4], S[5], S[6]) + K[i] + W[i];
112 t1 = Sigma0(S[0]) + Maj(S[0], S[1], S[2]);
113 S[7] = S[6];
114 S[6] = S[5];
115 S[5] = S[4];
116 S[4] = S[3] + t0;
117 S[3] = S[2];
118 S[2] = S[1];
119 S[1] = S[0];
120 S[0] = t0 + t1;
121 }
122
123 /* feedback */
124 for (i = 0; i < 8; i++) {
125 md->state[i] = md->state[i] + S[i];
126 }
127
128 return 0;
129 }
130
131
132 /**
133 Initialize the hash state
134 @param md The hash state you wish to initialize
135 @return 0 if successful
136 */
137 int sha512_init(sha512_state * md)
138 {
139 if (md == NULL) return 1;
140 md->curlen = 0;
141 md->length = 0;
142 md->state[0] = UINT64_C(0x6a09e667f3bcc908);
143 md->state[1] = UINT64_C(0xbb67ae8584caa73b);
144 md->state[2] = UINT64_C(0x3c6ef372fe94f82b);
145 md->state[3] = UINT64_C(0xa54ff53a5f1d36f1);
146 md->state[4] = UINT64_C(0x510e527fade682d1);
147 md->state[5] = UINT64_C(0x9b05688c2b3e6c1f);
148 md->state[6] = UINT64_C(0x1f83d9abfb41bd6b);
149 md->state[7] = UINT64_C(0x5be0cd19137e2179);
150 return 0;
151 }
152
153
154 int sha512_process(sha512_state * md, const unsigned char *in, unsigned long inlen)
155 {
156 size_t i;
157 size_t n;
158
159 int err;
160 if (md == NULL) return 1;
161 if (in == NULL) return 1;
162 if (md->curlen > sizeof(md->buf)) {
163 return 1;
164 }
165
166 while (inlen > 0) {
167 if (md->curlen == 0 && inlen >= 128) {
168 if ((err = sha512_compress(md, (unsigned char *)in)) != 0) {
169 return err;
170 }
171 md->length += 128 * 8;
172 in += 128;
173 inlen -= 128;
174 } else {
175 n = MIN(inlen, (128 - md->curlen));
176 for (i = 0; i < n; i++) {
177 md->buf[i + md->curlen] = in[i];
178 }
179 md->curlen += n;
180 in += n;
181 inlen -= n;
182 if (md->curlen == 128) {
183 if ((err = sha512_compress(md, md->buf)) != 0) {
184 return err;
185 }
186 md->length += 8*128;
187 md->curlen = 0;
188 }
189 }
190 }
191 return 0;
192 }
193
194 /**
195 Terminate the hash to get the digest
196 @param md The hash state
197 @param out [out] The destination of the hash (64 bytes)
198 @return 0 if successful
199 */
200 int sha512_done(sha512_state * md, unsigned char *out)
201 {
202 int i;
203
204 if (md == NULL) return 1;
205 if (out == NULL) return 1;
206
207 if (md->curlen >= sizeof(md->buf)) {
208 return 1;
209 }
210
211 /* increase the length of the message */
212 md->length += md->curlen * UINT64_C(8);
213
214 /* append the '1' bit */
215 md->buf[md->curlen++] = (unsigned char)0x80;
216
217 /* if the length is currently above 112 bytes we append zeros
218 * then compress. Then we can fall back to padding zeros and length
219 * encoding like normal.
220 */
221 if (md->curlen > 112) {
222 while (md->curlen < 128) {
223 md->buf[md->curlen++] = (unsigned char)0;
224 }
225 sha512_compress(md, md->buf);
226 md->curlen = 0;
227 }
228
229 /* pad upto 120 bytes of zeroes
230 * note: that from 112 to 120 is the 64 MSB of the length. We assume that you won't hash
231 * > 2^64 bits of data... :-)
232 */
233 while (md->curlen < 120) {
234 md->buf[md->curlen++] = (unsigned char)0;
235 }
236
237 /* store length */
238 STORE64H(md->length, md->buf+120);
239 sha512_compress(md, md->buf);
240
241 /* copy output */
242 for (i = 0; i < 8; i++) {
243 STORE64H(md->state[i], out+(8*i));
244 }
245 return 0;
246 }
247
248 /*
249 * Return 0 is two sha512 hashes match together, 1 otherwise.
250 * Hashes MUST be 64 byte long, and not NULL.
251 */
252 int
253 sha512_compare(unsigned char *h1, unsigned char *h2)
254 {
255 int i;
256 for (i=0; i<64; i++) {
257 if (h1[i] != h2[i])
258 return 1;
259 }
260
261 return 0;
262 }
263
264 /*
265 * Format a sha512 hash (64 bits long) as an hexadecimal string (128 char)
266 * A pointer to this char is statically allocated, so multiple calls to this
267 * function will overwrite the converted value.
268 */
269 char *
270 sha512_format(unsigned char *hash)
271 {
272 int i;
273 static char fmt[128] = "";
274
275 for (i=0; i<64; i++) {
276 snprintf(fmt+i, 2, "%02x\n", hash[i]);
277 }
278
279 return fmt;
280 }
281
282 /*
283 * Generate sha512 hash from stream, and store it in hash, which must
284 * be able to store 64 bytes.
285 */
286 int
287 sha512(FILE *stream, unsigned char *hash)
288 {
289 sha512_state md;
290 ssize_t len = 0;
291 unsigned char buf[127];
292
293 if (sha512_init(&md) != 0) {
294 perror("sha512_init");
295 return 1;
296 }
297
298 while ((len = fread(buf, 1, 127, stream)) > 0) {
299 if (sha512_process(&md, buf, len) != 0) {
300 return 1;
301 }
302 }
303
304 return sha512_done(&md, hash);
305 }
306
307
308 /* $Source: /cvs/libtom/libtomcrypt/src/hashes/sha2/sha512.c,v $ */
309 /* $Revision: 1.10 $ */
310 /* $Date: 2007/05/12 14:25:28 $ */