2 /* xbt_sha.c - SHA1 hash function */
4 /* Initial version part of iksemel (XML parser for Jabber)
5 * Copyright (C) 2000-2003 Gurer Ozen <madcat@e-kolay.net>. All right reserved. */
7 /* Adapted to fit into SimGrid by Martin Quinson.
8 Copyright (c) 2008 Martin Quinson. All rights reserved. */
10 /* This program is free software; you can redistribute it and/or modify it
11 * under the terms of the license (GNU LGPL) which comes with this package. */
13 #include "xbt/sysdep.h"
20 unsigned int lenhi, lenlo;
22 static void sha_calculate(xbt_sha_t sha);
28 /** @brief constructor */
29 xbt_sha_t xbt_sha_new(void)
33 sha = xbt_new(s_xbt_sha_t, 1);
39 /** @brief destructor */
40 void xbt_sha_free(xbt_sha_t sha)
45 void xbt_sha_reset(xbt_sha_t sha)
47 memset(sha, 0, sizeof(s_xbt_sha_t));
48 sha->hash[0] = 0x67452301;
49 sha->hash[1] = 0xefcdab89;
50 sha->hash[2] = 0x98badcfe;
51 sha->hash[3] = 0x10325476;
52 sha->hash[4] = 0xc3d2e1f0;
55 /* @brief Add some more data to the buffer */
56 void xbt_sha_feed(xbt_sha_t sha, const unsigned char *data, size_t len)
60 for (i = 0; i < len; i++) {
61 sha->buf[sha->blen / 4] <<= 8;
62 sha->buf[sha->blen / 4] |= (unsigned int) data[i];
63 if ((++sha->blen) % 64 == 0) {
68 sha->lenhi += (sha->lenlo < 8);
72 /* finalize computation before displaying the result */
73 static void xbt_sha_finalize(xbt_sha_t sha)
78 pad[0] = (unsigned char) ((sha->lenhi >> 24) & 0xff);
79 pad[1] = (unsigned char) ((sha->lenhi >> 16) & 0xff);
80 pad[2] = (unsigned char) ((sha->lenhi >> 8) & 0xff);
81 pad[3] = (unsigned char) (sha->lenhi & 0xff);
82 pad[4] = (unsigned char) ((sha->lenlo >> 24) & 0xff);
83 pad[5] = (unsigned char) ((sha->lenlo >> 16) & 0xff);
84 pad[6] = (unsigned char) ((sha->lenlo >> 8) & 0xff);
85 pad[7] = (unsigned char) (sha->lenlo & 255);
88 xbt_sha_feed(sha, &padc, 1);
91 while (sha->blen != 56)
92 xbt_sha_feed(sha, &padc, 1);
94 xbt_sha_feed(sha, pad, 8);
97 /** @brief returns the sha hash into a newly allocated buffer (+ reset sha object) */
98 char *xbt_sha_read(xbt_sha_t sha)
100 char *res = xbt_malloc(40);
101 xbt_sha_print(sha, res);
105 /** @brief copy the content sha hash into the @a hash pre-allocated string (and reset buffer) */
106 void xbt_sha_print(xbt_sha_t sha, char *hash)
110 xbt_sha_finalize(sha);
111 for (i = 0; i < 5; i++) {
112 sprintf(hash, "%08x", sha->hash[i]);
118 /** @brief simply compute a SHA1 hash and copy it to the provided buffer */
119 void xbt_sha(const char *data, char *hash)
124 xbt_sha_feed(&sha, (const unsigned char *) data, strlen(data));
126 xbt_sha_print(&sha, hash);
129 /* ********************* */
130 /* Core of the algorithm */
131 /* ********************* */
133 #define SRL(x,y) (((x) << (y)) | ((x) >> (32-(y))))
134 #define SHA(a,b,f,c) \
135 for (i= (a) ; i<= (b) ; i++) { \
136 TMP = SRL(A,5) + ( (f) ) + E + sha->buf[i] + (c) ; \
144 static void sha_calculate(xbt_sha_t sha)
147 unsigned int A, B, C, D, E, TMP;
149 for (i = 16; i < 80; i++)
151 SRL(sha->buf[i - 3] ^ sha->buf[i - 8] ^ sha->
152 buf[i - 14] ^ sha->buf[i - 16], 1);
160 SHA(0, 19, ((C ^ D) & B) ^ D, 0x5a827999);
161 SHA(20, 39, B ^ C ^ D, 0x6ed9eba1);
162 SHA(40, 59, (B & C) | (D & (B | C)), 0x8f1bbcdc);
163 SHA(60, 79, B ^ C ^ D, 0xca62c1d6);
176 #include "xbt/hash.h"
177 #include "portable.h" /* hexa_str */
179 static char *mycmp(const char *p1, const char *p2, size_t n)
183 for (i = 0; i < n; i++) {
184 if (p1[i] != p2[i]) {
185 return bprintf("Differs on %d -- Ox%x", i, p1[i]);
188 return xbt_strdup("");
191 static void test_sha(const char *clear, const char *hashed)
194 xbt_sha(clear, hash);
196 xbt_test_add1("==== Test with '%s'", clear);
197 xbt_test_assert3(!memcmp(hash, hashed, 40), "Wrong sha: %40s!=%40s (%s)",
198 hash, hashed, mycmp(hash, hashed, 40));
201 XBT_TEST_SUITE("hash", "Various hash functions");
203 XBT_LOG_NEW_DEFAULT_CATEGORY(hash, "Tests of various hash functions ");
206 XBT_TEST_UNIT("sha", test_crypto_sha, "Test of the sha algorithm")
208 /* Empty string as test vector */
209 test_sha("", "da39a3ee5e6b4b0d3255bfef95601890afd80709");
211 /* Some pangram as test vector */
212 test_sha("The quick brown fox jumps over the lazy dog",
213 "2fd4e1c67a2d28fced849ee1bb76e7391b93eb12");
214 test_sha("Woven silk pyjamas exchanged for blue quartz",
215 "da3aff337c810c6470db4dbf0f205c8afc31c442");
216 test_sha("Pack my box with five dozen liquor jugs",
217 "373ba8be29d4d95708bf7cd43038f4e409dcb439");
220 #endif /* SIMGRID_TEST */