1 /* A tribute to arc :) */
2
3
4 /*
5 ** SQLite uses this code for testing only. It is not a part of
6 ** the SQLite library. This file implements two new TCL commands
7 ** "md5" and "md5file" that compute md5 checksums on arbitrary text
8 ** and on complete files. These commands are used by the "testfixture"
9 ** program to help verify the correct operation of the SQLite library.
10 **
11 ** The original use of these TCL commands was to test the ROLLBACK
12 ** feature of SQLite. First compute the MD5-checksum of the database.
13 ** Then make some changes but rollback the changes rather than commit
14 ** them. Compute a second MD5-checksum of the file and verify that the
15 ** two checksums are the same. Such is the original use of this code.
16 ** New uses may have been added since this comment was written.
17 */
18 /*
19 * This code implements the MD5 message-digest algorithm.
20 * The algorithm is due to Ron Rivest. This code was
21 * written by Colin Plumb in 1993, no copyright is claimed.
22 * This code is in the public domain; do with it what you wish.
23 *
24 * Equivalent code is available from RSA Data Security, Inc.
25 * This code has been tested against that, and is equivalent,
26 * except that you don't need to include two pages of legalese
27 * with every copy.
28 *
29 * To compute the message digest of a chunk of bytes, declare an
30 * MD5Context structure, pass it to MD5Init, call MD5Update as
31 * needed on buffers full of bytes, and then call MD5Final, which
32 * will fill a supplied 16-byte array with the digest.
33 */
34
35 /*
36 * If compiled on a machine that doesn't have a 32-bit integer,
37 * you just set "uint32" to the appropriate datatype for an
38 * unsigned 32-bit integer. For example:
39 *
40 * cc -Duint32='unsigned long' md5.c
41 *
42 */
43 #ifndef uint32
44 # define uint32 unsigned int
45 #endif
46
47 struct Context {
48 uint32 buf[4];
49 uint32 bits[2];
50 unsigned char in[64];
51 };
52 typedef char MD5Context[88];
53
54 /*
55 * Note: this code is harmless on little-endian machines.
56 */
57 static void byteReverse (unsigned char *buf, unsigned longs){
58 uint32 t;
59 do {
60 t = (uint32)((unsigned)buf[3]<<8 | buf[2]) << 16 |
61 ((unsigned)buf[1]<<8 | buf[0]);
62 *(uint32 *)buf = t;
63 buf += 4;
64 } while (--longs);
65 }
66 /* The four core functions - F1 is optimized somewhat */
67
68 /* #define F1(x, y, z) (x & y | ~x & z) */
69 #define F1(x, y, z) (z ^ (x & (y ^ z)))
70 #define F2(x, y, z) F1(z, x, y)
71 #define F3(x, y, z) (x ^ y ^ z)
72 #define F4(x, y, z) (y ^ (x | ~z))
73
74 /* This is the central step in the MD5 algorithm. */
75 #define MD5STEP(f, w, x, y, z, data, s) \
76 ( w += f(x, y, z) + data, w = w<<s | w>>(32-s), w += x )
77
78 /*
79 * The core of the MD5 algorithm, this alters an existing MD5 hash to
80 * reflect the addition of 16 longwords of new data. MD5Update blocks
81 * the data and converts bytes into longwords for this routine.
82 */
83 static void MD5Transform(uint32 buf[4], const uint32 in[16]){
84 register uint32 a, b, c, d;
85
86 a = buf[0];
87 b = buf[1];
88 c = buf[2];
89 d = buf[3];
90
91 MD5STEP(F1, a, b, c, d, in[ 0]+0xd76aa478, 7);
92 MD5STEP(F1, d, a, b, c, in[ 1]+0xe8c7b756, 12);
93 MD5STEP(F1, c, d, a, b, in[ 2]+0x242070db, 17);
94 MD5STEP(F1, b, c, d, a, in[ 3]+0xc1bdceee, 22);
95 MD5STEP(F1, a, b, c, d, in[ 4]+0xf57c0faf, 7);
96 MD5STEP(F1, d, a, b, c, in[ 5]+0x4787c62a, 12);
97 MD5STEP(F1, c, d, a, b, in[ 6]+0xa8304613, 17);
98 MD5STEP(F1, b, c, d, a, in[ 7]+0xfd469501, 22);
99 MD5STEP(F1, a, b, c, d, in[ 8]+0x698098d8, 7);
100 MD5STEP(F1, d, a, b, c, in[ 9]+0x8b44f7af, 12);
101 MD5STEP(F1, c, d, a, b, in[10]+0xffff5bb1, 17);
102 MD5STEP(F1, b, c, d, a, in[11]+0x895cd7be, 22);
103 MD5STEP(F1, a, b, c, d, in[12]+0x6b901122, 7);
104 MD5STEP(F1, d, a, b, c, in[13]+0xfd987193, 12);
105 MD5STEP(F1, c, d, a, b, in[14]+0xa679438e, 17);
106 MD5STEP(F1, b, c, d, a, in[15]+0x49b40821, 22);
107
108 MD5STEP(F2, a, b, c, d, in[ 1]+0xf61e2562, 5);
109 MD5STEP(F2, d, a, b, c, in[ 6]+0xc040b340, 9);
110 MD5STEP(F2, c, d, a, b, in[11]+0x265e5a51, 14);
111 MD5STEP(F2, b, c, d, a, in[ 0]+0xe9b6c7aa, 20);
112 MD5STEP(F2, a, b, c, d, in[ 5]+0xd62f105d, 5);
113 MD5STEP(F2, d, a, b, c, in[10]+0x02441453, 9);
114 MD5STEP(F2, c, d, a, b, in[15]+0xd8a1e681, 14);
115 MD5STEP(F2, b, c, d, a, in[ 4]+0xe7d3fbc8, 20);
116 MD5STEP(F2, a, b, c, d, in[ 9]+0x21e1cde6, 5);
117 MD5STEP(F2, d, a, b, c, in[14]+0xc33707d6, 9);
118 MD5STEP(F2, c, d, a, b, in[ 3]+0xf4d50d87, 14);
119 MD5STEP(F2, b, c, d, a, in[ 8]+0x455a14ed, 20);
120 MD5STEP(F2, a, b, c, d, in[13]+0xa9e3e905, 5);
121 MD5STEP(F2, d, a, b, c, in[ 2]+0xfcefa3f8, 9);
122 MD5STEP(F2, c, d, a, b, in[ 7]+0x676f02d9, 14);
123 MD5STEP(F2, b, c, d, a, in[12]+0x8d2a4c8a, 20);
124
125 MD5STEP(F3, a, b, c, d, in[ 5]+0xfffa3942, 4);
126 MD5STEP(F3, d, a, b, c, in[ 8]+0x8771f681, 11);
127 MD5STEP(F3, c, d, a, b, in[11]+0x6d9d6122, 16);
128 MD5STEP(F3, b, c, d, a, in[14]+0xfde5380c, 23);
129 MD5STEP(F3, a, b, c, d, in[ 1]+0xa4beea44, 4);
130 MD5STEP(F3, d, a, b, c, in[ 4]+0x4bdecfa9, 11);
131 MD5STEP(F3, c, d, a, b, in[ 7]+0xf6bb4b60, 16);
132 MD5STEP(F3, b, c, d, a, in[10]+0xbebfbc70, 23);
133 MD5STEP(F3, a, b, c, d, in[13]+0x289b7ec6, 4);
134 MD5STEP(F3, d, a, b, c, in[ 0]+0xeaa127fa, 11);
135 MD5STEP(F3, c, d, a, b, in[ 3]+0xd4ef3085, 16);
136 MD5STEP(F3, b, c, d, a, in[ 6]+0x04881d05, 23);
137 MD5STEP(F3, a, b, c, d, in[ 9]+0xd9d4d039, 4);
138 MD5STEP(F3, d, a, b, c, in[12]+0xe6db99e5, 11);
139 MD5STEP(F3, c, d, a, b, in[15]+0x1fa27cf8, 16);
140 MD5STEP(F3, b, c, d, a, in[ 2]+0xc4ac5665, 23);
141
142 MD5STEP(F4, a, b, c, d, in[ 0]+0xf4292244, 6);
143 MD5STEP(F4, d, a, b, c, in[ 7]+0x432aff97, 10);
144 MD5STEP(F4, c, d, a, b, in[14]+0xab9423a7, 15);
145 MD5STEP(F4, b, c, d, a, in[ 5]+0xfc93a039, 21);
146 MD5STEP(F4, a, b, c, d, in[12]+0x655b59c3, 6);
147 MD5STEP(F4, d, a, b, c, in[ 3]+0x8f0ccc92, 10);
148 MD5STEP(F4, c, d, a, b, in[10]+0xffeff47d, 15);
149 MD5STEP(F4, b, c, d, a, in[ 1]+0x85845dd1, 21);
150 MD5STEP(F4, a, b, c, d, in[ 8]+0x6fa87e4f, 6);
151 MD5STEP(F4, d, a, b, c, in[15]+0xfe2ce6e0, 10);
152 MD5STEP(F4, c, d, a, b, in[ 6]+0xa3014314, 15);
153 MD5STEP(F4, b, c, d, a, in[13]+0x4e0811a1, 21);
154 MD5STEP(F4, a, b, c, d, in[ 4]+0xf7537e82, 6);
155 MD5STEP(F4, d, a, b, c, in[11]+0xbd3af235, 10);
156 MD5STEP(F4, c, d, a, b, in[ 2]+0x2ad7d2bb, 15);
157 MD5STEP(F4, b, c, d, a, in[ 9]+0xeb86d391, 21);
158
159 buf[0] += a;
160 buf[1] += b;
161 buf[2] += c;
162 buf[3] += d;
163 }
164
165 /*
166 * Start MD5 accumulation. Set bit count to 0 and buffer to mysterious
167 * initialization constants.
168 */
169 static void MD5Init(MD5Context *pCtx){
170 struct Context *ctx = (struct Context *)pCtx;
171 ctx->buf[0] = 0x67452301;
172 ctx->buf[1] = 0xefcdab89;
173 ctx->buf[2] = 0x98badcfe;
174 ctx->buf[3] = 0x10325476;
175 ctx->bits[0] = 0;
176 ctx->bits[1] = 0;
177 }
178
179 /*
180 * Update context to reflect the concatenation of another buffer full
181 * of bytes.
182 */
183 static
184 void MD5Update(MD5Context *pCtx, const unsigned char *buf, unsigned int len){
185 struct Context *ctx = (struct Context *)pCtx;
186 uint32 t;
187
188 /* Update bitcount */
189
190 t = ctx->bits[0];
191 if ((ctx->bits[0] = t + ((uint32)len << 3)) < t)
192 ctx->bits[1]++; /* Carry from low to high */
193 ctx->bits[1] += len >> 29;
194
195 t = (t >> 3) & 0x3f; /* Bytes already in shsInfo->data */
196
197 /* Handle any leading odd-sized chunks */
198
199 if ( t ) {
200 unsigned char *p = (unsigned char *)ctx->in + t;
201
202 t = 64-t;
203 if (len < t) {
204 memcpy(p, buf, len);
205 return;
206 }
207 memcpy(p, buf, t);
208 byteReverse(ctx->in, 16);
209 MD5Transform(ctx->buf, (uint32 *)ctx->in);
210 buf += t;
211 len -= t;
212 }
213
214 /* Process data in 64-byte chunks */
215
216 while (len >= 64) {
217 memcpy(ctx->in, buf, 64);
218 byteReverse(ctx->in, 16);
219 MD5Transform(ctx->buf, (uint32 *)ctx->in);
220 buf += 64;
221 len -= 64;
222 }
223
224 /* Handle any remaining bytes of data. */
225
226 memcpy(ctx->in, buf, len);
227 }
228
229 /*
230 * Final wrapup - pad to 64-byte boundary with the bit pattern
231 * 1 0* (64-bit count of bits processed, MSB-first)
232 */
233 static void MD5Final(unsigned char digest[16], MD5Context *pCtx){
234 struct Context *ctx = (struct Context *)pCtx;
235 unsigned count;
236 unsigned char *p;
237
238 /* Compute number of bytes mod 64 */
239 count = (ctx->bits[0] >> 3) & 0x3F;
240
241 /* Set the first char of padding to 0x80. This is safe since there is
242 always at least one byte free */
243 p = ctx->in + count;
244 *p++ = 0x80;
245
246 /* Bytes of padding needed to make 64 bytes */
247 count = 64 - 1 - count;
248
249 /* Pad out to 56 mod 64 */
250 if (count < 8) {
251 /* Two lots of padding: Pad the first block to 64 bytes */
252 memset(p, 0, count);
253 byteReverse(ctx->in, 16);
254 MD5Transform(ctx->buf, (uint32 *)ctx->in);
255
256 /* Now fill the next block with 56 bytes */
257 memset(ctx->in, 0, 56);
258 } else {
259 /* Pad block to 56 bytes */
260 memset(p, 0, count-8);
261 }
262 byteReverse(ctx->in, 14);
263
264 /* Append length in bits and transform */
265 ((uint32 *)ctx->in)[ 14 ] = ctx->bits[0];
266 ((uint32 *)ctx->in)[ 15 ] = ctx->bits[1];
267
268 MD5Transform(ctx->buf, (uint32 *)ctx->in);
269 byteReverse((unsigned char *)ctx->buf, 4);
270 memcpy(digest, ctx->buf, 16);
271 memset(ctx, 0, sizeof(ctx)); /* In case it's sensitive */
272 }
273
274 /*
275 ** Convert a digest into base-16. digest should be declared as
276 ** "unsigned char digest[16]" in the calling function. The MD5
277 ** digest is stored in the first 16 bytes. zBuf should
278 ** be "char zBuf[33]".
279 */
280 static void DigestToBase16(unsigned char *digest, char *zBuf){
281 static char const zEncode[] = "0123456789abcdef";
282 int i, j;
283
284 for(j=i=0; i<16; i++){
285 int a = digest[i];
286 zBuf[j++] = zEncode[(a>>4)&0xf];
287 zBuf[j++] = zEncode[a & 0xf];
288 }
289 zBuf[j] = 0;
290 }
291
292 int main(int argc, char **argv)
293 {
294 unsigned char buf[16];
295 MD5Context a;
296
297 char *x;
298 x = getpass("Password: ");
299 printf("%c:%02x\n", x[strlen(x)-1], x[strlen(x) -1]);
300 MD5Init(a);
301 MD5Update(a, x, strlen(x));
302 MD5Final(buf, a);
303
304 if(memcmp(buf, "\x15\x5f\xb9\x5d\x04\x28\x7b\x75\x7c\x99\x6d\x77\xb5\xea\x51\xf7", 16) == 0){
305 printf("You got the right password, congrats!\n");
306 setresgid(getegid(), getegid(), getegid());
307 setresuid(geteuid(), geteuid(), geteuid());
308 system("/bin/sh");
309 } else {
310 usleep(500);
311 printf("Incorrect password\n");
312 }
313 exit(0);
314 }
