Annotation of parser3/src/lib/md5/pa_md5c.c, revision 1.8
1.4 paf 1: /** @file
2: Parser: copied from apache 1.3.20 sources.
1.8 ! paf 3: Replaced ap_ to PA_ prefixes. linked into all targets but Apache-module target,
! 4: where linked targets/apache/PA_md5c.c stub instead.
1.4 paf 5:
1.6 paf 6: Copyright (c) 2001, 2003 ArtLebedev Group (http://www.artlebedev.com)
1.4 paf 7: */
8:
1.1 paf 9: /*
10: * This is work is derived from material Copyright RSA Data Security, Inc.
11: *
12: * The RSA copyright statement and Licence for that original material is
13: * included below. This is followed by the Apache copyright statement and
14: * licence for the modifications made to that material.
15: */
16:
17: /* MD5C.C - RSA Data Security, Inc., MD5 message-digest algorithm
18: */
19:
20: /* Copyright (C) 1991-2, RSA Data Security, Inc. Created 1991. All
21: rights reserved.
22:
23: License to copy and use this software is granted provided that it
24: is identified as the "RSA Data Security, Inc. MD5 Message-Digest
25: Algorithm" in all material mentioning or referencing this software
26: or this function.
27:
28: License is also granted to make and use derivative works provided
29: that such works are identified as "derived from the RSA Data
30: Security, Inc. MD5 Message-Digest Algorithm" in all material
31: mentioning or referencing the derived work.
32:
33: RSA Data Security, Inc. makes no representations concerning either
34: the merchantability of this software or the suitability of this
35: software for any particular purpose. It is provided "as is"
36: without express or implied warranty of any kind.
37:
38: These notices must be retained in any copies of any part of this
39: documentation and/or software.
40: */
41:
42: /* ====================================================================
43: * Copyright (c) 1996-1999 The Apache Group. All rights reserved.
44: *
45: * Redistribution and use in source and binary forms, with or without
46: * modification, are permitted provided that the following conditions
47: * are met:
48: *
49: * 1. Redistributions of source code must retain the above copyright
50: * notice, this list of conditions and the following disclaimer.
51: *
52: * 2. Redistributions in binary form must reproduce the above copyright
53: * notice, this list of conditions and the following disclaimer in
54: * the documentation and/or other materials provided with the
55: * distribution.
56: *
57: * 3. All advertising materials mentioning features or use of this
58: * software must display the following acknowledgment:
59: * "This product includes software developed by the Apache Group
60: * for use in the Apache HTTP server project (http://www.apache.org/)."
61: *
62: * 4. The names "Apache Server" and "Apache Group" must not be used to
63: * endorse or promote products derived from this software without
64: * prior written permission. For written permission, please contact
65: * apache@apache.org.
66: *
67: * 5. Products derived from this software may not be called "Apache"
68: * nor may "Apache" appear in their names without prior written
69: * permission of the Apache Group.
70: *
71: * 6. Redistributions of any form whatsoever must retain the following
72: * acknowledgment:
73: * "This product includes software developed by the Apache Group
74: * for use in the Apache HTTP server project (http://www.apache.org/)."
75: *
76: * THIS SOFTWARE IS PROVIDED BY THE APACHE GROUP ``AS IS'' AND ANY
77: * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
78: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
79: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE APACHE GROUP OR
80: * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
81: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
82: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
83: * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
84: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
85: * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
86: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
87: * OF THE POSSIBILITY OF SUCH DAMAGE.
88: * ====================================================================
89: *
90: * This software consists of voluntary contributions made by many
91: * individuals on behalf of the Apache Group and was originally based
92: * on public domain software written at the National Center for
93: * Supercomputing Applications, University of Illinois, Urbana-Champaign.
94: * For more information on the Apache Group and the Apache HTTP server
95: * project, please see <http://www.apache.org/>.
96: *
97: */
98:
99: /*
1.8 ! paf 100: * The PA_MD5Encode() routine uses much code obtained from the FreeBSD 3.0
1.1 paf 101: * MD5 crypt() function, which is licenced as follows:
102: * ----------------------------------------------------------------------------
103: * "THE BEER-WARE LICENSE" (Revision 42):
104: * <phk@login.dknet.dk> wrote this file. As long as you retain this notice you
105: * can do whatever you want with this stuff. If we meet some day, and you think
106: * this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
107: * ----------------------------------------------------------------------------
108: */
1.4 paf 109:
1.8 ! paf 110: static const char* IDENT_MD5_C="$Date: 2003/04/14 14:59:29 $";
1.1 paf 111:
1.3 paf 112: #include <string.h>
1.2 paf 113:
1.8 ! paf 114: #include "PA_md5.h"
1.1 paf 115: //#include "ap.h"
116: //#ifdef CHARSET_EBCDIC
117: //#include "ebcdic.h"
118: //#endif /*CHARSET_EBCDIC*/
119: //#if HAVE_CRYPT_H
120: //#include <crypt.h>
121: //#endif
122:
1.8 ! paf 123: #define PA_cpystrn(strDest, strSource, count) strncpy(strDest, strSource, count)
1.1 paf 124:
125: /* Constants for MD5Transform routine.
126: */
127:
128: #define S11 7
129: #define S12 12
130: #define S13 17
131: #define S14 22
132: #define S21 5
133: #define S22 9
134: #define S23 14
135: #define S24 20
136: #define S31 4
137: #define S32 11
138: #define S33 16
139: #define S34 23
140: #define S41 6
141: #define S42 10
142: #define S43 15
143: #define S44 21
144:
145: static void MD5Transform(UINT4 state[4], const unsigned char block[64]);
146: static void Encode(unsigned char *output, const UINT4 *input,
147: unsigned int len);
148: static void Decode(UINT4 *output, const unsigned char *input,
149: unsigned int len);
150:
151: static unsigned char PADDING[64] =
152: {
153: 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
154: 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
155: 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
156: };
157:
158: /* F, G, H and I are basic MD5 functions.
159: */
160: #define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
161: #define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
162: #define H(x, y, z) ((x) ^ (y) ^ (z))
163: #define I(x, y, z) ((y) ^ ((x) | (~z)))
164:
165: /* ROTATE_LEFT rotates x left n bits.
166: */
167: #define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
168:
169: /* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
170: Rotation is separate from addition to prevent recomputation.
171: */
172: #define FF(a, b, c, d, x, s, ac) { \
173: (a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
174: (a) = ROTATE_LEFT ((a), (s)); \
175: (a) += (b); \
176: }
177: #define GG(a, b, c, d, x, s, ac) { \
178: (a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
179: (a) = ROTATE_LEFT ((a), (s)); \
180: (a) += (b); \
181: }
182: #define HH(a, b, c, d, x, s, ac) { \
183: (a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
184: (a) = ROTATE_LEFT ((a), (s)); \
185: (a) += (b); \
186: }
187: #define II(a, b, c, d, x, s, ac) { \
188: (a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
189: (a) = ROTATE_LEFT ((a), (s)); \
190: (a) += (b); \
191: }
192:
193: /* MD5 initialization. Begins an MD5 operation, writing a new context.
194: */
1.8 ! paf 195: PA_API_EXPORT(void) PA_MD5Init(PA_MD5_CTX *context)
1.1 paf 196: {
197: context->count[0] = context->count[1] = 0;
198: /* Load magic initialization constants. */
199: context->state[0] = 0x67452301;
200: context->state[1] = 0xefcdab89;
201: context->state[2] = 0x98badcfe;
202: context->state[3] = 0x10325476;
203: }
204:
205: /* MD5 block update operation. Continues an MD5 message-digest
206: operation, processing another message block, and updating the
207: context.
208: */
1.8 ! paf 209: PA_API_EXPORT(void) PA_MD5Update(PA_MD5_CTX *context, const unsigned char *input,
1.1 paf 210: unsigned int inputLen)
211: {
212: unsigned int i, idx, partLen;
213:
214: /* Compute number of bytes mod 64 */
215: idx = (unsigned int) ((context->count[0] >> 3) & 0x3F);
216:
217: /* Update number of bits */
218: if ((context->count[0] += ((UINT4) inputLen << 3))
219: < ((UINT4) inputLen << 3)) {
220: context->count[1]++;
221: }
222: context->count[1] += (UINT4) inputLen >> 29;
223:
224: partLen = 64 - idx;
225:
226: /* Transform as many times as possible. */
227: #ifndef CHARSET_EBCDIC
228: if (inputLen >= partLen) {
229: memcpy(&context->buffer[idx], input, partLen);
230: MD5Transform(context->state, context->buffer);
231:
232: for (i = partLen; i + 63 < inputLen; i += 64) {
233: MD5Transform(context->state, &input[i]);
234: }
235:
236: idx = 0;
237: }
238: else {
239: i = 0;
240: }
241:
242: /* Buffer remaining input */
243: memcpy(&context->buffer[idx], &input[i], inputLen - i);
244: #else /*CHARSET_EBCDIC*/
245: if (inputLen >= partLen) {
246: ebcdic2ascii(&context->buffer[idx], input, partLen);
247: MD5Transform(context->state, context->buffer);
248:
249: for (i = partLen; i + 63 < inputLen; i += 64) {
250: unsigned char inp_tmp[64];
251: ebcdic2ascii(inp_tmp, &input[i], 64);
252: MD5Transform(context->state, inp_tmp);
253: }
254:
255: idx = 0;
256: }
257: else {
258: i = 0;
259: }
260:
261: /* Buffer remaining input */
262: ebcdic2ascii(&context->buffer[idx], &input[i], inputLen - i);
263: #endif /*CHARSET_EBCDIC*/
264: }
265:
266: /* MD5 finalization. Ends an MD5 message-digest operation, writing the
267: the message digest and zeroizing the context.
268: */
1.8 ! paf 269: PA_API_EXPORT(void) PA_MD5Final(unsigned char digest[16], PA_MD5_CTX *context)
1.1 paf 270: {
271: unsigned char bits[8];
272: unsigned int idx, padLen;
273:
274:
275: /* Save number of bits */
276: Encode(bits, context->count, 8);
277:
278: #ifdef CHARSET_EBCDIC
279: /* XXX: @@@: In order to make this no more complex than necessary,
280: * this kludge converts the bits[] array using the ascii-to-ebcdic
1.8 ! paf 281: * table, because the following PA_MD5Update() re-translates
1.1 paf 282: * its input (ebcdic-to-ascii).
1.8 ! paf 283: * Otherwise, we would have to pass a "conversion" flag to PA_MD5Update()
1.1 paf 284: */
285: ascii2ebcdic(bits,bits,8);
286:
1.8 ! paf 287: /* Since everything is converted to ascii within PA_MD5Update(),
1.1 paf 288: * the initial 0x80 (PADDING[0]) must be stored as 0x20
289: */
290: PADDING[0] = os_toebcdic[0x80];
291: #endif /*CHARSET_EBCDIC*/
292:
293: /* Pad out to 56 mod 64. */
294: idx = (unsigned int) ((context->count[0] >> 3) & 0x3f);
295: padLen = (idx < 56) ? (56 - idx) : (120 - idx);
1.8 ! paf 296: PA_MD5Update(context, (const unsigned char *)PADDING, padLen);
1.1 paf 297:
298: /* Append length (before padding) */
1.8 ! paf 299: PA_MD5Update(context, (const unsigned char *)bits, 8);
1.1 paf 300:
301: /* Store state in digest */
302: Encode(digest, context->state, 16);
303:
304: /* Zeroize sensitive information. */
305: memset(context, 0, sizeof(*context));
306: }
307:
308: /* MD5 basic transformation. Transforms state based on block. */
309: static void MD5Transform(UINT4 state[4], const unsigned char block[64])
310: {
311: UINT4 a = state[0], b = state[1], c = state[2], d = state[3], x[16];
312:
313: Decode(x, block, 64);
314:
315: /* Round 1 */
316: FF(a, b, c, d, x[0], S11, 0xd76aa478); /* 1 */
317: FF(d, a, b, c, x[1], S12, 0xe8c7b756); /* 2 */
318: FF(c, d, a, b, x[2], S13, 0x242070db); /* 3 */
319: FF(b, c, d, a, x[3], S14, 0xc1bdceee); /* 4 */
320: FF(a, b, c, d, x[4], S11, 0xf57c0faf); /* 5 */
321: FF(d, a, b, c, x[5], S12, 0x4787c62a); /* 6 */
322: FF(c, d, a, b, x[6], S13, 0xa8304613); /* 7 */
323: FF(b, c, d, a, x[7], S14, 0xfd469501); /* 8 */
324: FF(a, b, c, d, x[8], S11, 0x698098d8); /* 9 */
325: FF(d, a, b, c, x[9], S12, 0x8b44f7af); /* 10 */
326: FF(c, d, a, b, x[10], S13, 0xffff5bb1); /* 11 */
327: FF(b, c, d, a, x[11], S14, 0x895cd7be); /* 12 */
328: FF(a, b, c, d, x[12], S11, 0x6b901122); /* 13 */
329: FF(d, a, b, c, x[13], S12, 0xfd987193); /* 14 */
330: FF(c, d, a, b, x[14], S13, 0xa679438e); /* 15 */
331: FF(b, c, d, a, x[15], S14, 0x49b40821); /* 16 */
332:
333: /* Round 2 */
334: GG(a, b, c, d, x[1], S21, 0xf61e2562); /* 17 */
335: GG(d, a, b, c, x[6], S22, 0xc040b340); /* 18 */
336: GG(c, d, a, b, x[11], S23, 0x265e5a51); /* 19 */
337: GG(b, c, d, a, x[0], S24, 0xe9b6c7aa); /* 20 */
338: GG(a, b, c, d, x[5], S21, 0xd62f105d); /* 21 */
339: GG(d, a, b, c, x[10], S22, 0x2441453); /* 22 */
340: GG(c, d, a, b, x[15], S23, 0xd8a1e681); /* 23 */
341: GG(b, c, d, a, x[4], S24, 0xe7d3fbc8); /* 24 */
342: GG(a, b, c, d, x[9], S21, 0x21e1cde6); /* 25 */
343: GG(d, a, b, c, x[14], S22, 0xc33707d6); /* 26 */
344: GG(c, d, a, b, x[3], S23, 0xf4d50d87); /* 27 */
345: GG(b, c, d, a, x[8], S24, 0x455a14ed); /* 28 */
346: GG(a, b, c, d, x[13], S21, 0xa9e3e905); /* 29 */
347: GG(d, a, b, c, x[2], S22, 0xfcefa3f8); /* 30 */
348: GG(c, d, a, b, x[7], S23, 0x676f02d9); /* 31 */
349: GG(b, c, d, a, x[12], S24, 0x8d2a4c8a); /* 32 */
350:
351: /* Round 3 */
352: HH(a, b, c, d, x[5], S31, 0xfffa3942); /* 33 */
353: HH(d, a, b, c, x[8], S32, 0x8771f681); /* 34 */
354: HH(c, d, a, b, x[11], S33, 0x6d9d6122); /* 35 */
355: HH(b, c, d, a, x[14], S34, 0xfde5380c); /* 36 */
356: HH(a, b, c, d, x[1], S31, 0xa4beea44); /* 37 */
357: HH(d, a, b, c, x[4], S32, 0x4bdecfa9); /* 38 */
358: HH(c, d, a, b, x[7], S33, 0xf6bb4b60); /* 39 */
359: HH(b, c, d, a, x[10], S34, 0xbebfbc70); /* 40 */
360: HH(a, b, c, d, x[13], S31, 0x289b7ec6); /* 41 */
361: HH(d, a, b, c, x[0], S32, 0xeaa127fa); /* 42 */
362: HH(c, d, a, b, x[3], S33, 0xd4ef3085); /* 43 */
363: HH(b, c, d, a, x[6], S34, 0x4881d05); /* 44 */
364: HH(a, b, c, d, x[9], S31, 0xd9d4d039); /* 45 */
365: HH(d, a, b, c, x[12], S32, 0xe6db99e5); /* 46 */
366: HH(c, d, a, b, x[15], S33, 0x1fa27cf8); /* 47 */
367: HH(b, c, d, a, x[2], S34, 0xc4ac5665); /* 48 */
368:
369: /* Round 4 */
370: II(a, b, c, d, x[0], S41, 0xf4292244); /* 49 */
371: II(d, a, b, c, x[7], S42, 0x432aff97); /* 50 */
372: II(c, d, a, b, x[14], S43, 0xab9423a7); /* 51 */
373: II(b, c, d, a, x[5], S44, 0xfc93a039); /* 52 */
374: II(a, b, c, d, x[12], S41, 0x655b59c3); /* 53 */
375: II(d, a, b, c, x[3], S42, 0x8f0ccc92); /* 54 */
376: II(c, d, a, b, x[10], S43, 0xffeff47d); /* 55 */
377: II(b, c, d, a, x[1], S44, 0x85845dd1); /* 56 */
378: II(a, b, c, d, x[8], S41, 0x6fa87e4f); /* 57 */
379: II(d, a, b, c, x[15], S42, 0xfe2ce6e0); /* 58 */
380: II(c, d, a, b, x[6], S43, 0xa3014314); /* 59 */
381: II(b, c, d, a, x[13], S44, 0x4e0811a1); /* 60 */
382: II(a, b, c, d, x[4], S41, 0xf7537e82); /* 61 */
383: II(d, a, b, c, x[11], S42, 0xbd3af235); /* 62 */
384: II(c, d, a, b, x[2], S43, 0x2ad7d2bb); /* 63 */
385: II(b, c, d, a, x[9], S44, 0xeb86d391); /* 64 */
386:
387: state[0] += a;
388: state[1] += b;
389: state[2] += c;
390: state[3] += d;
391:
392: /* Zeroize sensitive information. */
393: memset(x, 0, sizeof(x));
394: }
395:
396: /* Encodes input (UINT4) into output (unsigned char). Assumes len is
397: a multiple of 4.
398: */
399: static void Encode(unsigned char *output, const UINT4 *input, unsigned int len)
400: {
401: unsigned int i, j;
402: UINT4 k;
403:
404: for (i = 0, j = 0; j < len; i++, j += 4) {
405: k = input[i];
406: output[j] = (unsigned char) (k & 0xff);
407: output[j + 1] = (unsigned char) ((k >> 8) & 0xff);
408: output[j + 2] = (unsigned char) ((k >> 16) & 0xff);
409: output[j + 3] = (unsigned char) ((k >> 24) & 0xff);
410: }
411: }
412:
413: /* Decodes input (unsigned char) into output (UINT4). Assumes len is
414: * a multiple of 4.
415: */
416: static void Decode(UINT4 *output, const unsigned char *input, unsigned int len)
417: {
418: unsigned int i, j;
419:
420: for (i = 0, j = 0; j < len; i++, j += 4)
421: output[i] = ((UINT4) input[j]) | (((UINT4) input[j + 1]) << 8) |
422: (((UINT4) input[j + 2]) << 16) | (((UINT4) input[j + 3]) << 24);
423: }
424:
425: /*
426: * The following MD5 password encryption code was largely borrowed from
427: * the FreeBSD 3.0 /usr/src/lib/libcrypt/crypt.c file, which is
428: * licenced as stated at the top of this file.
429: */
1.8 ! paf 430: PA_API_EXPORT(void) PA_to64(char *s, unsigned long v, int n)
1.1 paf 431: {
432: static unsigned char itoa64[] = /* 0 ... 63 => ASCII - 64 */
433: "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
434:
435: while (--n >= 0) {
436: *s++ = itoa64[v&0x3f];
437: v >>= 6;
438: }
439: }
440:
1.8 ! paf 441: PA_API_EXPORT(void) PA_MD5Encode(const unsigned char *pw,
1.7 paf 442: const unsigned char *salt, int mix_in_magic_string,
1.8 ! paf 443: char* result_base64, size_t result_base64_size)
1.1 paf 444: {
445: /*
446: * Minimum size is 8 bytes for salt, plus 1 for the trailing NUL,
447: * plus 4 for the '$' separators, plus the password hash itself.
448: * Let's leave a goodly amount of leeway.
449: */
450:
451: char passwd[120], *p;
452: const unsigned char *sp, *ep;
453: unsigned char final[16];
454: int i;
455: unsigned int sl;
456: int pl;
457: unsigned int pwlen;
458: PA_MD5_CTX ctx, ctx1;
459: unsigned long l;
460:
461: /*
462: * Refine the salt first. It's possible we were given an already-hashed
463: * string as the salt argument, so extract the actual salt value from it
464: * if so. Otherwise just use the string up to the first '$' as the salt.
465: */
466: sp = salt;
467:
468: /*
469: * If it starts with the magic string, then skip that.
470: */
471: if (strncmp((char *)sp, PA_MD5PW_ID, PA_MD5PW_IDLEN) == 0) {
472: sp += PA_MD5PW_IDLEN;
473: }
474:
475: /*
476: * It stops at the first '$' or 8 chars, whichever comes first
477: */
478: for (ep = sp; (*ep != '\0') && (*ep != '$') && (ep < (sp + 8)); ep++) {
479: continue;
480: }
481:
482: /*
483: * Get the length of the true salt
484: */
485: sl = ep - sp;
486:
487: /*
488: * 'Time to make the doughnuts..'
489: */
1.8 ! paf 490: PA_MD5Init(&ctx);
1.1 paf 491:
492: pwlen = strlen((char *)pw);
493: /*
494: * The password first, since that is what is most unknown
495: */
1.8 ! paf 496: PA_MD5Update(&ctx, pw, pwlen);
1.1 paf 497:
1.7 paf 498: if(mix_in_magic_string) {
499: /*
500: * Then our magic string
501: */
1.8 ! paf 502: PA_MD5Update(&ctx, (const unsigned char *) PA_MD5PW_ID, PA_MD5PW_IDLEN);
1.7 paf 503: }
1.1 paf 504:
505: /*
506: * Then the raw salt
507: */
1.8 ! paf 508: PA_MD5Update(&ctx, sp, sl);
1.1 paf 509:
510: /*
511: * Then just as many characters of the MD5(pw, salt, pw)
512: */
1.8 ! paf 513: PA_MD5Init(&ctx1);
! 514: PA_MD5Update(&ctx1, pw, pwlen);
! 515: PA_MD5Update(&ctx1, sp, sl);
! 516: PA_MD5Update(&ctx1, pw, pwlen);
! 517: PA_MD5Final(final, &ctx1);
1.1 paf 518: for(pl = pwlen; pl > 0; pl -= 16) {
1.8 ! paf 519: PA_MD5Update(&ctx, final, (pl > 16) ? 16 : (unsigned int) pl);
1.1 paf 520: }
521:
522: /*
523: * Don't leave anything around in vm they could use.
524: */
525: memset(final, 0, sizeof(final));
526:
527: /*
528: * Then something really weird...
529: */
530: for (i = pwlen; i != 0; i >>= 1) {
531: if (i & 1) {
1.8 ! paf 532: PA_MD5Update(&ctx, final, 1);
1.1 paf 533: }
534: else {
1.8 ! paf 535: PA_MD5Update(&ctx, pw, 1);
1.1 paf 536: }
537: }
538:
539: /*
540: * Now make the output string. We know our limitations, so we
541: * can use the string routines without bounds checking.
542: */
1.8 ! paf 543: PA_cpystrn(passwd, PA_MD5PW_ID, PA_MD5PW_IDLEN + 1);
! 544: PA_cpystrn(passwd + PA_MD5PW_IDLEN, (char *)sp, sl + 1);
1.1 paf 545: passwd[PA_MD5PW_IDLEN + sl] = '$';
546: passwd[PA_MD5PW_IDLEN + sl + 1] = '\0';
547:
1.8 ! paf 548: PA_MD5Final(final, &ctx);
1.1 paf 549:
550: /*
551: * And now, just to make sure things don't run too fast..
552: * On a 60 Mhz Pentium this takes 34 msec, so you would
553: * need 30 seconds to build a 1000 entry dictionary...
554: */
555: for (i = 0; i < 1000; i++) {
1.8 ! paf 556: PA_MD5Init(&ctx1);
1.1 paf 557: if (i & 1) {
1.8 ! paf 558: PA_MD5Update(&ctx1, pw, pwlen);
1.1 paf 559: }
560: else {
1.8 ! paf 561: PA_MD5Update(&ctx1, final, 16);
1.1 paf 562: }
563: if (i % 3) {
1.8 ! paf 564: PA_MD5Update(&ctx1, sp, sl);
1.1 paf 565: }
566:
567: if (i % 7) {
1.8 ! paf 568: PA_MD5Update(&ctx1, pw, pwlen);
1.1 paf 569: }
570:
571: if (i & 1) {
1.8 ! paf 572: PA_MD5Update(&ctx1, final, 16);
1.1 paf 573: }
574: else {
1.8 ! paf 575: PA_MD5Update(&ctx1, pw, pwlen);
1.1 paf 576: }
1.8 ! paf 577: PA_MD5Final(final,&ctx1);
1.1 paf 578: }
579:
580: p = passwd + strlen(passwd);
581:
1.8 ! paf 582: l = (final[ 0]<<16) | (final[ 6]<<8) | final[12]; PA_to64(p, l, 4); p += 4;
! 583: l = (final[ 1]<<16) | (final[ 7]<<8) | final[13]; PA_to64(p, l, 4); p += 4;
! 584: l = (final[ 2]<<16) | (final[ 8]<<8) | final[14]; PA_to64(p, l, 4); p += 4;
! 585: l = (final[ 3]<<16) | (final[ 9]<<8) | final[15]; PA_to64(p, l, 4); p += 4;
! 586: l = (final[ 4]<<16) | (final[10]<<8) | final[ 5]; PA_to64(p, l, 4); p += 4;
! 587: l = final[11] ; PA_to64(p, l, 2); p += 2;
1.1 paf 588: *p = '\0';
589:
590: /*
591: * Don't leave anything around in vm they could use.
592: */
593: memset(final, 0, sizeof(final));
1.7 paf 594:
1.8 ! paf 595:
! 596: PA_cpystrn(result_base64, passwd, result_base64_size - 1);
1.1 paf 597: }
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