Add support for newer CPU models.
[dragonfly.git] / usr.sbin / pppd / chap_ms.c
bloba7e5b0fba3963a08f2bb018eec1ae1edaa354c90
1 /*
2 * chap_ms.c - Microsoft MS-CHAP compatible implementation.
4 * Copyright (c) 1995 Eric Rosenquist, Strata Software Limited.
5 * http://www.strataware.com/
7 * All rights reserved.
9 * Redistribution and use in source and binary forms are permitted
10 * provided that the above copyright notice and this paragraph are
11 * duplicated in all such forms and that any documentation,
12 * advertising materials, and other materials related to such
13 * distribution and use acknowledge that the software was developed
14 * by Eric Rosenquist. The name of the author may not be used to
15 * endorse or promote products derived from this software without
16 * specific prior written permission.
18 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
20 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
22 * $FreeBSD: src/usr.sbin/pppd/chap_ms.c,v 1.8 2000/02/24 21:10:28 markm Exp $
23 * $DragonFly: src/usr.sbin/pppd/chap_ms.c,v 1.5 2005/11/24 23:42:54 swildner Exp $
27 * Modifications by Lauri Pesonen / lpesonen@clinet.fi, april 1997
29 * Implemented LANManager type password response to MS-CHAP challenges.
30 * Now pppd provides both NT style and LANMan style blocks, and the
31 * prefered is set by option "ms-lanman". Default is to use NT.
32 * The hash text (StdText) was taken from Win95 RASAPI32.DLL.
34 * You should also use DOMAIN\\USERNAME as described in README.MSCHAP80
37 #ifdef CHAPMS
39 #include <stdio.h>
40 #include <string.h>
41 #include <ctype.h>
42 #include <sys/types.h>
43 #include <sys/time.h>
44 #include <syslog.h>
45 #include <unistd.h>
46 #ifdef HAVE_CRYPT_H
47 #include <crypt.h>
48 #endif
50 #include "pppd.h"
51 #include "chap.h"
52 #include "chap_ms.h"
53 #include "md4.h"
55 #ifndef USE_CRYPT
56 #include <openssl/des.h>
57 #endif
59 typedef struct {
60 u_char LANManResp[24];
61 u_char NTResp[24];
62 u_char UseNT; /* If 1, ignore the LANMan response field */
63 } MS_ChapResponse;
64 /* We use MS_CHAP_RESPONSE_LEN, rather than sizeof(MS_ChapResponse),
65 in case this struct gets padded. */
68 static void ChallengeResponse(u_char *, u_char *, u_char *);
69 static void DesEncrypt(u_char *, u_char *, u_char *);
70 static void MakeKey(u_char *, u_char *);
71 static u_char Get7Bits(u_char *, int);
72 static void ChapMS_NT(char *, int, char *, int, MS_ChapResponse *);
73 #ifdef MSLANMAN
74 static void ChapMS_LANMan(char *, int, char *, int, MS_ChapResponse *);
75 #endif
77 #ifdef USE_CRYPT
78 static void Expand(u_char *, u_char *);
79 static void Collapse(u_char *, u_char *);
80 #endif
83 * Parameters:
84 * challenge: IN 8 octets
85 * pwHash: IN 16 octets
86 * response: OUT 24 octets
88 static void
89 ChallengeResponse(u_char *challenge, u_char *pwHash, u_char *response)
91 char ZPasswordHash[21];
93 BZERO(ZPasswordHash, sizeof(ZPasswordHash));
94 BCOPY(pwHash, ZPasswordHash, MD4_SIGNATURE_SIZE);
96 #if 0
97 log_packet(ZPasswordHash, sizeof(ZPasswordHash), "ChallengeResponse - ZPasswordHash", LOG_DEBUG);
98 #endif
100 DesEncrypt(challenge, ZPasswordHash + 0, response + 0);
101 DesEncrypt(challenge, ZPasswordHash + 7, response + 8);
102 DesEncrypt(challenge, ZPasswordHash + 14, response + 16);
104 #if 0
105 log_packet(response, 24, "ChallengeResponse - response", LOG_DEBUG);
106 #endif
110 #ifdef USE_CRYPT
112 * Parameters:
113 * clear: IN 8 octets
114 * key: IN 7 octets
115 * cipher: OUT 8 octets
117 static void
118 DesEncrypt(u_char *clear, u_char *key, u_char *cipher)
120 u_char des_key[8];
121 u_char crypt_key[66];
122 u_char des_input[66];
124 MakeKey(key, des_key);
126 Expand(des_key, crypt_key);
127 setkey(crypt_key);
129 #if 0
130 CHAPDEBUG((LOG_INFO, "DesEncrypt: 8 octet input : %02X%02X%02X%02X%02X%02X%02X%02X",
131 clear[0], clear[1], clear[2], clear[3], clear[4], clear[5], clear[6], clear[7]));
132 #endif
134 Expand(clear, des_input);
135 encrypt(des_input, 0);
136 Collapse(des_input, cipher);
138 #if 0
139 CHAPDEBUG((LOG_INFO, "DesEncrypt: 8 octet output: %02X%02X%02X%02X%02X%02X%02X%02X",
140 cipher[0], cipher[1], cipher[2], cipher[3], cipher[4], cipher[5], cipher[6], cipher[7]));
141 #endif
144 #else /* USE_CRYPT */
147 * Parameters:
148 * clear: IN 8 octets
149 * key: IN 7 octets
150 * cipher: OUT 8 octets
152 static void
153 DesEncrypt(u_char *clear, u_char *key, u_char *cipher)
155 des_cblock des_key;
156 des_key_schedule key_schedule;
158 MakeKey(key, des_key);
160 des_set_key(&des_key, key_schedule);
162 #if 0
163 CHAPDEBUG((LOG_INFO, "DesEncrypt: 8 octet input : %02X%02X%02X%02X%02X%02X%02X%02X",
164 clear[0], clear[1], clear[2], clear[3], clear[4], clear[5], clear[6], clear[7]));
165 #endif
167 des_ecb_encrypt((des_cblock *)clear, (des_cblock *)cipher, key_schedule, 1);
169 #if 0
170 CHAPDEBUG((LOG_INFO, "DesEncrypt: 8 octet output: %02X%02X%02X%02X%02X%02X%02X%02X",
171 cipher[0], cipher[1], cipher[2], cipher[3], cipher[4], cipher[5], cipher[6], cipher[7]));
172 #endif
175 #endif /* USE_CRYPT */
178 static u_char
179 Get7Bits(u_char *input, int startBit)
181 unsigned int word;
183 word = (unsigned)input[startBit / 8] << 8;
184 word |= (unsigned)input[startBit / 8 + 1];
186 word >>= 15 - (startBit % 8 + 7);
188 return word & 0xFE;
191 #ifdef USE_CRYPT
193 /* in == 8-byte string (expanded version of the 56-bit key)
194 * out == 64-byte string where each byte is either 1 or 0
195 * Note that the low-order "bit" is always ignored by by setkey()
197 static void
198 Expand(u_char *in, u_char *out)
200 int j, c;
201 int i;
203 for(i = 0; i < 64; in++){
204 c = *in;
205 for(j = 7; j >= 0; j--)
206 *out++ = (c >> j) & 01;
207 i += 8;
211 /* The inverse of Expand
213 static void
214 Collapse(u_char *in, u_char *out)
216 int j;
217 int i;
218 unsigned int c;
220 for (i = 0; i < 64; i += 8, out++) {
221 c = 0;
222 for (j = 7; j >= 0; j--, in++)
223 c |= *in << j;
224 *out = c & 0xff;
227 #endif
230 * Parameters:
231 * IN 56 bit DES key missing parity bits
232 * OUT 64 bit DES key with parity bits added
234 static void
235 MakeKey(u_char *key, u_char *des_key)
237 des_key[0] = Get7Bits(key, 0);
238 des_key[1] = Get7Bits(key, 7);
239 des_key[2] = Get7Bits(key, 14);
240 des_key[3] = Get7Bits(key, 21);
241 des_key[4] = Get7Bits(key, 28);
242 des_key[5] = Get7Bits(key, 35);
243 des_key[6] = Get7Bits(key, 42);
244 des_key[7] = Get7Bits(key, 49);
246 #ifndef USE_CRYPT
247 des_set_odd_parity((des_cblock *)des_key);
248 #endif
250 #if 0
251 CHAPDEBUG((LOG_INFO, "MakeKey: 56-bit input : %02X%02X%02X%02X%02X%02X%02X",
252 key[0], key[1], key[2], key[3], key[4], key[5], key[6]));
253 CHAPDEBUG((LOG_INFO, "MakeKey: 64-bit output: %02X%02X%02X%02X%02X%02X%02X%02X",
254 des_key[0], des_key[1], des_key[2], des_key[3], des_key[4], des_key[5], des_key[6], des_key[7]));
255 #endif
258 static void
259 ChapMS_NT(char *rchallenge, int rchallenge_len, char *secret, int secret_len,
260 MS_ChapResponse *response)
262 int i;
263 MD4_CTX md4Context;
264 u_char hash[MD4_SIGNATURE_SIZE];
265 u_char unicodePassword[MAX_NT_PASSWORD * 2];
267 /* Initialize the Unicode version of the secret (== password). */
268 /* This implicitly supports 8-bit ISO8859/1 characters. */
269 BZERO(unicodePassword, sizeof(unicodePassword));
270 for (i = 0; i < secret_len; i++)
271 unicodePassword[i * 2] = (u_char)secret[i];
273 MD4Init(&md4Context);
274 MD4Update(&md4Context, unicodePassword, secret_len * 2); /* Unicode is 2 bytes/char */
276 MD4Final(hash, &md4Context); /* Tell MD4 we're done */
278 ChallengeResponse(rchallenge, hash, response->NTResp);
281 #ifdef MSLANMAN
282 static u_char *StdText = (u_char *)"KGS!@#$%"; /* key from rasapi32.dll */
284 static void
285 ChapMS_LANMan(char *rchallenge, int rchallenge_len, char *secret,
286 int secret_len, MS_ChapResponse *response)
288 int i;
289 u_char UcasePassword[MAX_NT_PASSWORD]; /* max is actually 14 */
290 u_char PasswordHash[MD4_SIGNATURE_SIZE];
292 /* LANMan password is case insensitive */
293 BZERO(UcasePassword, sizeof(UcasePassword));
294 for (i = 0; i < secret_len; i++)
295 UcasePassword[i] = (u_char)toupper(secret[i]);
296 DesEncrypt( StdText, UcasePassword + 0, PasswordHash + 0 );
297 DesEncrypt( StdText, UcasePassword + 7, PasswordHash + 8 );
298 ChallengeResponse(rchallenge, PasswordHash, response->LANManResp);
300 #endif
302 void
303 ChapMS(chap_state *cstate, char *rchallenge, int rchallenge_len, char *secret,
304 int secret_len)
306 MS_ChapResponse response;
307 #ifdef MSLANMAN
308 extern int ms_lanman;
309 #endif
311 #if 0
312 CHAPDEBUG((LOG_INFO, "ChapMS: secret is '%.*s'", secret_len, secret));
313 #endif
314 BZERO(&response, sizeof(response));
316 /* Calculate both always */
317 ChapMS_NT(rchallenge, rchallenge_len, secret, secret_len, &response);
319 #ifdef MSLANMAN
320 ChapMS_LANMan(rchallenge, rchallenge_len, secret, secret_len, &response);
322 /* prefered method is set by option */
323 response.UseNT = !ms_lanman;
324 #else
325 response.UseNT = 1;
326 #endif
328 BCOPY(&response, cstate->response, MS_CHAP_RESPONSE_LEN);
329 cstate->resp_length = MS_CHAP_RESPONSE_LEN;
332 #endif /* CHAPMS */