1 /* xbt_sha.c - SHA1 hash function */
3 /* Copyright (c) 2008-2014. The SimGrid Team.
4 * All rights reserved. */
6 /* This program is free software; you can redistribute it and/or modify it
7 * under the terms of the license (GNU LGPL) which comes with this package. */
9 /* Initial version part of iksemel (XML parser for Jabber)
10 * Copyright (C) 2000-2003 Gurer Ozen <madcat@e-kolay.net>. All right reserved.
11 * Distributed under LGPL v2.1, February 1999.
14 /* Later adapted to fit into SimGrid. Distributed under LGPL v2.1, Feb 1999.*/
16 #include "xbt/sysdep.h"
18 #include <stdio.h> /* sprintf */
24 unsigned int lenhi, lenlo;
26 static void sha_calculate(xbt_sha_t sha);
32 /** @brief constructor */
33 xbt_sha_t xbt_sha_new(void)
37 sha = xbt_new(s_xbt_sha_t, 1);
43 /** @brief destructor */
44 void xbt_sha_free(xbt_sha_t sha)
49 void xbt_sha_reset(xbt_sha_t sha)
51 memset(sha, 0, sizeof(s_xbt_sha_t));
52 sha->hash[0] = 0x67452301;
53 sha->hash[1] = 0xefcdab89;
54 sha->hash[2] = 0x98badcfe;
55 sha->hash[3] = 0x10325476;
56 sha->hash[4] = 0xc3d2e1f0;
59 /* @brief Add some more data to the buffer */
60 void xbt_sha_feed(xbt_sha_t sha, const unsigned char *data, size_t len)
64 for (i = 0; i < len; i++) {
65 sha->buf[sha->blen / 4] <<= 8;
66 sha->buf[sha->blen / 4] |= (unsigned int) data[i];
67 if ((++sha->blen) % 64 == 0) {
72 sha->lenhi += (sha->lenlo < 8);
76 /* finalize computation before displaying the result */
77 static void xbt_sha_finalize(xbt_sha_t sha)
82 pad[0] = (unsigned char) ((sha->lenhi >> 24) & 0xff);
83 pad[1] = (unsigned char) ((sha->lenhi >> 16) & 0xff);
84 pad[2] = (unsigned char) ((sha->lenhi >> 8) & 0xff);
85 pad[3] = (unsigned char) (sha->lenhi & 0xff);
86 pad[4] = (unsigned char) ((sha->lenlo >> 24) & 0xff);
87 pad[5] = (unsigned char) ((sha->lenlo >> 16) & 0xff);
88 pad[6] = (unsigned char) ((sha->lenlo >> 8) & 0xff);
89 pad[7] = (unsigned char) (sha->lenlo & 255);
92 xbt_sha_feed(sha, &padc, 1);
95 while (sha->blen != 56)
96 xbt_sha_feed(sha, &padc, 1);
98 xbt_sha_feed(sha, pad, 8);
101 /** @brief returns the sha hash into a newly allocated buffer (+ reset sha object) */
102 char *xbt_sha_read(xbt_sha_t sha)
104 char *res = xbt_malloc(41);
105 xbt_sha_print(sha, res);
109 /** @brief copy the content sha hash into the @a hash pre-allocated string (and reset buffer) */
110 void xbt_sha_print(xbt_sha_t sha, char *hash)
114 xbt_sha_finalize(sha);
115 for (i = 0; i < 5; i++) {
116 sprintf(hash, "%08x", sha->hash[i]);
122 /** @brief simply compute a SHA1 hash and copy it to the provided buffer */
123 void xbt_sha(const char *data, char *hash)
128 xbt_sha_feed(&sha, (const unsigned char *) data, strlen(data));
130 xbt_sha_print(&sha, hash);
133 /* ********************* */
134 /* Core of the algorithm */
135 /* ********************* */
137 #define SRL(x,y) (((x) << (y)) | ((x) >> (32-(y))))
138 #define SHA(a,b,f,c) \
139 for (i= (a) ; i<= (b) ; i++) { \
140 TMP = SRL(A,5) + ( (f) ) + E + sha->buf[i] + (c) ; \
148 static void sha_calculate(xbt_sha_t sha)
151 unsigned int A, B, C, D, E, TMP;
153 for (i = 16; i < 80; i++)
155 SRL(sha->buf[i - 3] ^ sha->buf[i - 8] ^ sha->
156 buf[i - 14] ^ sha->buf[i - 16], 1);
164 SHA(0, 19, ((C ^ D) & B) ^ D, 0x5a827999);
165 SHA(20, 39, B ^ C ^ D, 0x6ed9eba1);
166 SHA(40, 59, (B & C) | (D & (B | C)), 0x8f1bbcdc);
167 SHA(60, 79, B ^ C ^ D, 0xca62c1d6);
180 #include "xbt/hash.h"
181 #include "src/portable.h" /* hexa_str */
183 static char *mycmp(const char *p1, const char *p2, size_t n)
187 for (i = 0; i < n; i++) {
188 if (p1[i] != p2[i]) {
189 return bprintf("Differs on %d -- Ox%x", i, p1[i]);
192 return xbt_strdup("");
195 static void test_sha(const char *clear, const char *hashed)
198 xbt_sha(clear, hash);
200 xbt_test_add("==== Test with '%s'", clear);
201 xbt_test_assert(!memcmp(hash, hashed, 40), "Wrong sha: %40s!=%40s (%s)",
202 hash, hashed, mycmp(hash, hashed, 40));
205 XBT_TEST_SUITE("hash", "Various hash functions");
207 XBT_TEST_UNIT("sha", test_crypto_sha, "Test of the sha algorithm")
209 /* Empty string as test vector */
210 test_sha("", "da39a3ee5e6b4b0d3255bfef95601890afd80709");
212 /* Some pangram as test vector */
213 test_sha("The quick brown fox jumps over the lazy dog",
214 "2fd4e1c67a2d28fced849ee1bb76e7391b93eb12");
215 test_sha("Woven silk pyjamas exchanged for blue quartz",
216 "da3aff337c810c6470db4dbf0f205c8afc31c442");
217 test_sha("Pack my box with five dozen liquor jugs",
218 "373ba8be29d4d95708bf7cd43038f4e409dcb439");
221 #endif /* SIMGRID_TEST */