source: source/ariba/utility/misc/sha1.cpp@ 2439

Last change on this file since 2439 was 2439, checked in by Christoph Mayer, 15 years ago

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1// [licence]
2// 100% free public domain implementation of the SHA-1 algorithm
3// by Dominik Reichl <dominik.reichl@t-online.de>
4// [licence]
5/*
6 Version 1.5 - 2005-01-01
7 - 64-bit compiler compatibility added
8 - Made variable wiping optional (define SHA1_WIPE_VARIABLES)
9 - Removed unnecessary variable initializations
10 - ROL32 improvement for the Microsoft compiler (using _rotl)
11
12 ======== Test Vectors (from FIPS PUB 180-1) ========
13
14 SHA1("abc") =
15 A9993E36 4706816A BA3E2571 7850C26C 9CD0D89D
16
17 SHA1("abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq") =
18 84983E44 1C3BD26E BAAE4AA1 F95129E5 E54670F1
19
20 SHA1(A million repetitions of "a") =
21 34AA973C D4C4DAA4 F61EEB2B DBAD2731 6534016F
22*/
23
24
25/**
26 * @file SHA1.cc
27 */
28
29#include "sha1.h"
30
31#ifdef SHA1_UTILITY_FUNCTIONS
32#define SHA1_MAX_FILE_BUFFER 8000
33#endif
34
35// Rotate x bits to the left
36#ifndef ROL32
37#ifdef _MSC_VER
38#define ROL32(_val32, _nBits) _rotl(_val32, _nBits)
39#else
40#define ROL32(_val32, _nBits) (((_val32)<<(_nBits))|((_val32)>>(32-(_nBits))))
41#endif
42#endif
43
44#ifdef SHA1_LITTLE_ENDIAN
45#define SHABLK0(i) (m_block->l[i] = \
46 (ROL32(m_block->l[i],24) & 0xFF00FF00) | (ROL32(m_block->l[i],8) & 0x00FF00FF))
47#else
48#define SHABLK0(i) (m_block->l[i])
49#endif
50
51#define SHABLK(i) (m_block->l[i&15] = ROL32(m_block->l[(i+13)&15] ^ m_block->l[(i+8)&15] \
52 ^ m_block->l[(i+2)&15] ^ m_block->l[i&15],1))
53
54// SHA-1 rounds
55#define _R0(v,w,x,y,z,i) { z+=((w&(x^y))^y)+SHABLK0(i)+0x5A827999+ROL32(v,5); w=ROL32(w,30); }
56#define _R1(v,w,x,y,z,i) { z+=((w&(x^y))^y)+SHABLK(i)+0x5A827999+ROL32(v,5); w=ROL32(w,30); }
57#define _R2(v,w,x,y,z,i) { z+=(w^x^y)+SHABLK(i)+0x6ED9EBA1+ROL32(v,5); w=ROL32(w,30); }
58#define _R3(v,w,x,y,z,i) { z+=(((w|x)&y)|(w&x))+SHABLK(i)+0x8F1BBCDC+ROL32(v,5); w=ROL32(w,30); }
59#define _R4(v,w,x,y,z,i) { z+=(w^x^y)+SHABLK(i)+0xCA62C1D6+ROL32(v,5); w=ROL32(w,30); }
60
61CSHA1::CSHA1()
62{
63 m_block = (SHA1_WORKSPACE_BLOCK *)m_workspace;
64
65 Reset();
66}
67
68CSHA1::~CSHA1()
69{
70 Reset();
71}
72
73void CSHA1::Reset()
74{
75 // SHA1 initialization constants
76 m_state[0] = 0x67452301;
77 m_state[1] = 0xEFCDAB89;
78 m_state[2] = 0x98BADCFE;
79 m_state[3] = 0x10325476;
80 m_state[4] = 0xC3D2E1F0;
81
82 m_count[0] = 0;
83 m_count[1] = 0;
84}
85
86void CSHA1::Transform(UINT_32 *state, UINT_8 *buffer)
87{
88 // Copy state[] to working vars
89 UINT_32 a = state[0], b = state[1], c = state[2], d = state[3], e = state[4];
90
91 memcpy(m_block, buffer, 64);
92
93 // 4 rounds of 20 operations each. Loop unrolled.
94 _R0(a,b,c,d,e, 0);
95 _R0(e,a,b,c,d, 1);
96 _R0(d,e,a,b,c, 2);
97 _R0(c,d,e,a,b, 3);
98 _R0(b,c,d,e,a, 4);
99 _R0(a,b,c,d,e, 5);
100 _R0(e,a,b,c,d, 6);
101 _R0(d,e,a,b,c, 7);
102 _R0(c,d,e,a,b, 8);
103 _R0(b,c,d,e,a, 9);
104 _R0(a,b,c,d,e,10);
105 _R0(e,a,b,c,d,11);
106 _R0(d,e,a,b,c,12);
107 _R0(c,d,e,a,b,13);
108 _R0(b,c,d,e,a,14);
109 _R0(a,b,c,d,e,15);
110 _R1(e,a,b,c,d,16);
111 _R1(d,e,a,b,c,17);
112 _R1(c,d,e,a,b,18);
113 _R1(b,c,d,e,a,19);
114 _R2(a,b,c,d,e,20);
115 _R2(e,a,b,c,d,21);
116 _R2(d,e,a,b,c,22);
117 _R2(c,d,e,a,b,23);
118 _R2(b,c,d,e,a,24);
119 _R2(a,b,c,d,e,25);
120 _R2(e,a,b,c,d,26);
121 _R2(d,e,a,b,c,27);
122 _R2(c,d,e,a,b,28);
123 _R2(b,c,d,e,a,29);
124 _R2(a,b,c,d,e,30);
125 _R2(e,a,b,c,d,31);
126 _R2(d,e,a,b,c,32);
127 _R2(c,d,e,a,b,33);
128 _R2(b,c,d,e,a,34);
129 _R2(a,b,c,d,e,35);
130 _R2(e,a,b,c,d,36);
131 _R2(d,e,a,b,c,37);
132 _R2(c,d,e,a,b,38);
133 _R2(b,c,d,e,a,39);
134 _R3(a,b,c,d,e,40);
135 _R3(e,a,b,c,d,41);
136 _R3(d,e,a,b,c,42);
137 _R3(c,d,e,a,b,43);
138 _R3(b,c,d,e,a,44);
139 _R3(a,b,c,d,e,45);
140 _R3(e,a,b,c,d,46);
141 _R3(d,e,a,b,c,47);
142 _R3(c,d,e,a,b,48);
143 _R3(b,c,d,e,a,49);
144 _R3(a,b,c,d,e,50);
145 _R3(e,a,b,c,d,51);
146 _R3(d,e,a,b,c,52);
147 _R3(c,d,e,a,b,53);
148 _R3(b,c,d,e,a,54);
149 _R3(a,b,c,d,e,55);
150 _R3(e,a,b,c,d,56);
151 _R3(d,e,a,b,c,57);
152 _R3(c,d,e,a,b,58);
153 _R3(b,c,d,e,a,59);
154 _R4(a,b,c,d,e,60);
155 _R4(e,a,b,c,d,61);
156 _R4(d,e,a,b,c,62);
157 _R4(c,d,e,a,b,63);
158 _R4(b,c,d,e,a,64);
159 _R4(a,b,c,d,e,65);
160 _R4(e,a,b,c,d,66);
161 _R4(d,e,a,b,c,67);
162 _R4(c,d,e,a,b,68);
163 _R4(b,c,d,e,a,69);
164 _R4(a,b,c,d,e,70);
165 _R4(e,a,b,c,d,71);
166 _R4(d,e,a,b,c,72);
167 _R4(c,d,e,a,b,73);
168 _R4(b,c,d,e,a,74);
169 _R4(a,b,c,d,e,75);
170 _R4(e,a,b,c,d,76);
171 _R4(d,e,a,b,c,77);
172 _R4(c,d,e,a,b,78);
173 _R4(b,c,d,e,a,79);
174
175 // Add the working vars back into state
176 state[0] += a;
177 state[1] += b;
178 state[2] += c;
179 state[3] += d;
180 state[4] += e;
181
182 // Wipe variables
183#ifdef SHA1_WIPE_VARIABLES
184
185 a = b = c = d = e = 0;
186#endif
187}
188
189// Use this function to hash in binary data and strings
190void CSHA1::Update(UINT_8 *data, UINT_32 len)
191{
192 UINT_32 i, j;
193
194 j = (m_count[0] >> 3) & 63;
195
196 if((m_count[0] += len << 3) < (len << 3))
197 m_count[1]++;
198
199 m_count[1] += (len >> 29);
200
201 if((j + len) > 63) {
202 i = 64 - j;
203 memcpy(&m_buffer[j], data, i);
204 Transform(m_state, m_buffer);
205
206 for( ; i + 63 < len; i += 64)
207 Transform(m_state, &data[i]);
208
209 j = 0;
210 } else
211 i = 0;
212
213 memcpy(&m_buffer[j], &data[i], len - i);
214}
215
216#ifdef SHA1_UTILITY_FUNCTIONS
217// Hash in file contents
218bool CSHA1::HashFile(char *szFileName)
219{
220 unsigned long ulFileSize, ulRest, ulBlocks;
221 unsigned long i;
222 UINT_8 uData[SHA1_MAX_FILE_BUFFER];
223 FILE *fIn;
224
225 if(szFileName == NULL)
226 return false;
227
228 fIn = fopen(szFileName, "rb");
229 if(fIn == NULL)
230 return false;
231
232 fseek(fIn, 0, SEEK_END);
233 ulFileSize = (unsigned long)ftell(fIn);
234 fseek(fIn, 0, SEEK_SET);
235
236 if(ulFileSize != 0) {
237 ulBlocks = ulFileSize / SHA1_MAX_FILE_BUFFER;
238 ulRest = ulFileSize % SHA1_MAX_FILE_BUFFER;
239 } else {
240 ulBlocks = 0;
241 ulRest = 0;
242 }
243
244 for(i = 0; i < ulBlocks; i++) {
245 fread(uData, 1, SHA1_MAX_FILE_BUFFER, fIn);
246 Update((UINT_8 *)uData, SHA1_MAX_FILE_BUFFER);
247 }
248
249 if(ulRest != 0) {
250 fread(uData, 1, ulRest, fIn);
251 Update((UINT_8 *)uData, ulRest);
252 }
253
254 fclose(fIn);
255 fIn = NULL;
256 return true;
257}
258#endif
259
260void CSHA1::Final()
261{
262 UINT_32 i;
263 UINT_8 finalcount[8];
264
265 for(i = 0; i < 8; i++)
266 finalcount[i] = (UINT_8)((m_count[((i >= 4) ? 0 : 1)]
267 >> ((3 - (i & 3)) * 8) ) & 255); // Endian independent
268
269 Update((UINT_8 *)"\200", 1);
270
271 while ((m_count[0] & 504) != 448)
272 Update((UINT_8 *)"\0", 1);
273
274 Update(finalcount, 8); // Cause a SHA1Transform()
275
276 for(i = 0; i < 20; i++) {
277 m_digest[i] = (UINT_8)((m_state[i >> 2] >> ((3 - (i & 3)) * 8) ) & 255);
278 }
279
280 // Wipe variables for security reasons
281#ifdef SHA1_WIPE_VARIABLES
282 i = 0;
283 memset(m_buffer, 0, 64);
284 memset(m_state, 0, 20);
285 memset(m_count, 0, 8);
286 memset(finalcount, 0, 8);
287 Transform(m_state, m_buffer);
288#endif
289}
290
291#ifdef SHA1_UTILITY_FUNCTIONS
292// Get the final hash as a pre-formatted string
293void CSHA1::ReportHash(char *szReport, unsigned char uReportType)
294{
295 unsigned char i;
296 char szTemp[16];
297
298 if(szReport == NULL)
299 return;
300
301 if(uReportType == REPORT_HEX) {
302 //sprintf(szTemp, "%02x", m_digest[0]);
303 //strcat(szReport, szTemp);
304
305 for(i = 0; i < 20; i++) {
306 sprintf(szTemp, "%02x", m_digest[i]);
307 strcat(szReport, szTemp);
308 }
309 } else if(uReportType == REPORT_DIGIT) {
310 sprintf(szTemp, "%u", m_digest[0]);
311 strcat(szReport, szTemp);
312
313 for(i = 1; i < 20; i++) {
314 sprintf(szTemp, " %u", m_digest[i]);
315 strcat(szReport, szTemp);
316 }
317 } else
318 strcpy(szReport, "Error: Unknown report type!");
319}
320#endif
321
322// Get the raw message digest
323void CSHA1::GetHash(UINT_8 *puDest)
324{
325 memcpy(puDest, m_digest, 20);
326}
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