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1 | /* | |
2 | * aim_login.c | |
3 | * | |
4 | * This contains all the functions needed to actually login. | |
5 | * | |
6 | */ | |
7 | ||
8 | #include <faim/aim.h> | |
9 | ||
10 | #include "md5.h" | |
11 | ||
12 | static int aim_encode_password_md5(const char *password, const char *key, md5_byte_t *digest); | |
13 | ||
14 | /* | |
15 | * FIXME: Reimplement the TIS stuff. | |
16 | */ | |
17 | #ifdef TIS_TELNET_PROXY | |
18 | #include "tis_telnet_proxy.h" | |
19 | #endif | |
20 | ||
21 | int aim_sendconnack(struct aim_session_t *sess, | |
22 | struct aim_conn_t *conn) | |
23 | { | |
24 | int curbyte=0; | |
25 | ||
26 | struct command_tx_struct *newpacket; | |
27 | ||
28 | if (!(newpacket = aim_tx_new(AIM_FRAMETYPE_OSCAR, 0x0001, conn, 4))) | |
29 | return -1; | |
30 | ||
31 | newpacket->lock = 1; | |
32 | ||
33 | curbyte += aimutil_put16(newpacket->data+curbyte, 0x0000); | |
34 | curbyte += aimutil_put16(newpacket->data+curbyte, 0x0001); | |
35 | ||
36 | newpacket->lock = 0; | |
37 | return aim_tx_enqueue(sess, newpacket); | |
38 | } | |
39 | ||
40 | /* | |
41 | * In AIM 3.5 protocol, the first stage of login is to request | |
42 | * login from the Authorizer, passing it the screen name | |
43 | * for verification. If the name is invalid, a 0017/0003 | |
44 | * is spit back, with the standard error contents. If valid, | |
45 | * a 0017/0007 comes back, which is the signal to send | |
46 | * it the main login command (0017/0002). | |
47 | */ | |
48 | int aim_request_login(struct aim_session_t *sess, | |
49 | struct aim_conn_t *conn, | |
50 | char *sn) | |
51 | { | |
52 | int curbyte=0; | |
53 | ||
54 | struct command_tx_struct *newpacket; | |
55 | ||
56 | if (!(newpacket = aim_tx_new(AIM_FRAMETYPE_OSCAR, 0x0002, conn, 10+2+2+strlen(sn)))) | |
57 | return -1; | |
58 | ||
59 | newpacket->lock = 1; | |
60 | ||
61 | curbyte += aim_putsnac(newpacket->data+curbyte, 0x0017, 0x0006, 0x0000, 0x00010000); | |
62 | curbyte += aim_puttlv_str(newpacket->data+curbyte, 0x0001, strlen(sn), sn); | |
63 | ||
64 | newpacket->lock = 0; | |
65 | return aim_tx_enqueue(sess, newpacket); | |
66 | } | |
67 | ||
68 | /* | |
69 | * send_login(int socket, char *sn, char *password) | |
70 | * | |
71 | * This is the initial login request packet. | |
72 | * | |
73 | * The password is encoded before transmition, as per | |
74 | * encode_password(). See that function for their | |
75 | * stupid method of doing it. | |
76 | * | |
77 | */ | |
78 | int aim_send_login (struct aim_session_t *sess, | |
79 | struct aim_conn_t *conn, | |
80 | char *sn, char *password, struct client_info_s *clientinfo, | |
81 | char *key) | |
82 | { | |
83 | int curbyte=0; | |
84 | md5_byte_t digest[16]; | |
85 | ||
86 | struct command_tx_struct *newpacket; | |
87 | ||
88 | if (!clientinfo || !sn || !password) | |
89 | return -1; | |
90 | ||
91 | if (!(newpacket = aim_tx_new(AIM_FRAMETYPE_OSCAR, 0x0002, conn, 1152))) | |
92 | return -1; | |
93 | ||
94 | newpacket->lock = 1; | |
95 | ||
96 | newpacket->hdr.oscar.type = 0x02; | |
97 | ||
98 | curbyte = aim_putsnac(newpacket->data+curbyte, 0x0017, 0x0002, 0x0000, 0x00010000); | |
99 | ||
100 | curbyte+= aim_puttlv_str(newpacket->data+curbyte, 0x0001, strlen(sn), sn); | |
101 | ||
102 | aim_encode_password_md5(password, key, digest); | |
103 | curbyte+= aim_puttlv_str(newpacket->data+curbyte, 0x0025, 16, digest); | |
104 | ||
105 | /* XXX is clientstring required by oscar? */ | |
106 | if (strlen(clientinfo->clientstring)) | |
107 | curbyte += aim_puttlv_str(newpacket->data+curbyte, 0x0003, strlen(clientinfo->clientstring), clientinfo->clientstring); | |
108 | ||
109 | curbyte += aim_puttlv_16(newpacket->data+curbyte, 0x0016, clientinfo->major2); | |
110 | curbyte += aim_puttlv_16(newpacket->data+curbyte, 0x0017, clientinfo->major); | |
111 | curbyte += aim_puttlv_16(newpacket->data+curbyte, 0x0018, clientinfo->minor); | |
112 | curbyte += aim_puttlv_16(newpacket->data+curbyte, 0x0019, clientinfo->minor2); | |
113 | curbyte += aim_puttlv_16(newpacket->data+curbyte, 0x001a, clientinfo->build); | |
114 | ||
115 | curbyte += aim_puttlv_32(newpacket->data+curbyte, 0x0014, clientinfo->unknown); | |
116 | curbyte += aim_puttlv_16(newpacket->data+curbyte, 0x0009, 0x0015); | |
117 | ||
118 | if (strlen(clientinfo->country)) | |
119 | curbyte += aim_puttlv_str(newpacket->data+curbyte, 0x000e, strlen(clientinfo->country), clientinfo->country); | |
120 | else | |
121 | curbyte += aim_puttlv_str(newpacket->data+curbyte, 0x000e, 2, "us"); | |
122 | ||
123 | if (strlen(clientinfo->lang)) | |
124 | curbyte += aim_puttlv_str(newpacket->data+curbyte, 0x000f, strlen(clientinfo->lang), clientinfo->lang); | |
125 | else | |
126 | curbyte += aim_puttlv_str(newpacket->data+curbyte, 0x000f, 2, "en"); | |
127 | ||
128 | newpacket->commandlen = curbyte; | |
129 | ||
130 | newpacket->lock = 0; | |
131 | return aim_tx_enqueue(sess, newpacket); | |
132 | } | |
133 | ||
134 | static int aim_encode_password_md5(const char *password, const char *key, md5_byte_t *digest) | |
135 | { | |
136 | md5_state_t state; | |
137 | ||
138 | md5_init(&state); | |
139 | md5_append(&state, (const md5_byte_t *)key, strlen(key)); | |
140 | md5_append(&state, (const md5_byte_t *)password, strlen(password)); | |
141 | md5_append(&state, (const md5_byte_t *)AIM_MD5_STRING, strlen(AIM_MD5_STRING)); | |
142 | md5_finish(&state, (md5_byte_t *)digest); | |
143 | ||
144 | return 0; | |
145 | } | |
146 | ||
147 | /* | |
148 | * int encode_password( | |
149 | * const char *password, | |
150 | * char *encoded | |
151 | * ); | |
152 | * | |
153 | * This takes a const pointer to a (null terminated) string | |
154 | * containing the unencoded password. It also gets passed | |
155 | * an already allocated buffer to store the encoded password. | |
156 | * This buffer should be the exact length of the password without | |
157 | * the null. The encoded password buffer IS NOT NULL TERMINATED. | |
158 | * | |
159 | * The encoding_table seems to be a fixed set of values. We'll | |
160 | * hope it doesn't change over time! | |
161 | * | |
162 | * NOTE: This is no longer used. Its here for historical reference. | |
163 | * | |
164 | */ | |
165 | #if 0 | |
166 | static int aim_encode_password(const char *password, unsigned char *encoded) | |
167 | { | |
168 | u_char encoding_table[] = { | |
169 | #if 0 /* old v1 table */ | |
170 | 0xf3, 0xb3, 0x6c, 0x99, | |
171 | 0x95, 0x3f, 0xac, 0xb6, | |
172 | 0xc5, 0xfa, 0x6b, 0x63, | |
173 | 0x69, 0x6c, 0xc3, 0x9f | |
174 | #else /* v2.1 table, also works for ICQ */ | |
175 | 0xf3, 0x26, 0x81, 0xc4, | |
176 | 0x39, 0x86, 0xdb, 0x92, | |
177 | 0x71, 0xa3, 0xb9, 0xe6, | |
178 | 0x53, 0x7a, 0x95, 0x7c | |
179 | #endif | |
180 | }; | |
181 | ||
182 | int i; | |
183 | ||
184 | for (i = 0; i < strlen(password); i++) | |
185 | encoded[i] = (password[i] ^ encoding_table[i]); | |
186 | ||
187 | return 0; | |
188 | } | |
189 | #endif | |
190 | ||
191 | /* | |
192 | * This is sent back as a general response to the login command. | |
193 | * It can be either an error or a success, depending on the | |
194 | * precense of certain TLVs. | |
195 | * | |
196 | * The client should check the value of logininfo->errorcode. If | |
197 | * its nonzero, there was an error. | |
198 | * | |
199 | */ | |
200 | int aim_authparse(struct aim_session_t *sess, | |
201 | struct command_rx_struct *command) | |
202 | { | |
203 | struct aim_tlvlist_t *tlvlist; | |
204 | int ret = 1; | |
205 | char *sn; | |
206 | rxcallback_t userfunc = NULL; | |
207 | ||
208 | memset(&sess->logininfo, 0x00, sizeof(sess->logininfo)); | |
209 | ||
210 | /* | |
211 | * Read block of TLVs. All further data is derived | |
212 | * from what is parsed here. | |
213 | * | |
214 | * For SNAC login, there's a 17/3 SNAC header in front. | |
215 | * | |
216 | */ | |
217 | tlvlist = aim_readtlvchain(command->data+10, command->commandlen-10); | |
218 | ||
219 | /* | |
220 | * No matter what, we should have a screen name. | |
221 | */ | |
222 | sn = aim_gettlv_str(tlvlist, 0x0001, 1); | |
223 | strncpy(sess->logininfo.screen_name, sn, strlen(sn)); | |
224 | free(sn); | |
225 | ||
226 | /* | |
227 | * Check for an error code. If so, we should also | |
228 | * have an error url. | |
229 | */ | |
230 | if (aim_gettlv(tlvlist, 0x0008, 1)) { | |
231 | struct aim_tlv_t *errtlv; | |
232 | errtlv = aim_gettlv(tlvlist, 0x0008, 1); | |
233 | sess->logininfo.errorcode = aimutil_get16(errtlv->value); | |
234 | sess->logininfo.errorurl = aim_gettlv_str(tlvlist, 0x0004, 1); | |
235 | } | |
236 | /* | |
237 | * If we have both an IP number (0x0005) and a cookie (0x0006), | |
238 | * then the login was successful. | |
239 | */ | |
240 | else if (aim_gettlv(tlvlist, 0x0005, 1) && aim_gettlv(tlvlist, 0x0006, 1) | |
241 | /*aim_gettlv(tlvlist, 0x0006, 1)->length*/) { | |
242 | struct aim_tlv_t *tmptlv; | |
243 | ||
244 | /* | |
245 | * IP address of BOS server. | |
246 | */ | |
247 | sess->logininfo.BOSIP = aim_gettlv_str(tlvlist, 0x0005, 1); | |
248 | ||
249 | /* | |
250 | * Authorization Cookie | |
251 | */ | |
252 | tmptlv = aim_gettlv(tlvlist, 0x0006, 1); | |
253 | memcpy(sess->logininfo.cookie, tmptlv->value, AIM_COOKIELEN); | |
254 | ||
255 | /* | |
256 | * The email address attached to this account | |
257 | * Not available for ICQ logins. | |
258 | */ | |
259 | if (aim_gettlv(tlvlist, 0x0011, 1)) | |
260 | sess->logininfo.email = aim_gettlv_str(tlvlist, 0x0011, 1); | |
261 | ||
262 | /* | |
263 | * The registration status. (Not real sure what it means.) | |
264 | * Not available for ICQ logins. | |
265 | */ | |
266 | if ((tmptlv = aim_gettlv(tlvlist, 0x0013, 1))) | |
267 | sess->logininfo.regstatus = aimutil_get16(tmptlv->value); | |
268 | ||
269 | } | |
270 | ||
271 | userfunc = aim_callhandler(command->conn, 0x0017, 0x0003); | |
272 | ||
273 | if (userfunc) | |
274 | ret = userfunc(sess, command); | |
275 | ||
276 | aim_freetlvchain(&tlvlist); | |
277 | ||
278 | if (sess->logininfo.BOSIP) { | |
279 | free(sess->logininfo.BOSIP); | |
280 | sess->logininfo.BOSIP = NULL; | |
281 | } | |
282 | if (sess->logininfo.email) { | |
283 | free(sess->logininfo.email); | |
284 | sess->logininfo.email = NULL; | |
285 | } | |
286 | if (sess->logininfo.errorurl) { | |
287 | free(sess->logininfo.errorurl); | |
288 | sess->logininfo.errorurl = NULL; | |
289 | } | |
290 | ||
291 | return ret; | |
292 | } | |
293 | ||
294 | /* | |
295 | * Middle handler for 0017/0007 SNACs. Contains the auth key prefixed | |
296 | * by only its length in a two byte word. | |
297 | * | |
298 | * Calls the client, which should then use the value to call aim_send_login. | |
299 | * | |
300 | */ | |
301 | int aim_authkeyparse(struct aim_session_t *sess, struct command_rx_struct *command) | |
302 | { | |
303 | unsigned char *key; | |
304 | int keylen; | |
305 | int ret = 1; | |
306 | rxcallback_t userfunc; | |
307 | ||
308 | keylen = aimutil_get16(command->data+10); | |
309 | if (!(key = malloc(keylen+1))) | |
310 | return ret; | |
311 | memcpy(key, command->data+12, keylen); | |
312 | key[keylen] = '\0'; | |
313 | ||
314 | if ((userfunc = aim_callhandler(command->conn, 0x0017, 0x0007))) | |
315 | ret = userfunc(sess, command, key); | |
316 | ||
317 | free(key); | |
318 | ||
319 | return ret; | |
320 | } | |
321 | ||
322 | /* | |
323 | * Generate an authorization response. | |
324 | * | |
325 | * You probably don't want this unless you're writing an AIM server. | |
326 | * | |
327 | */ | |
328 | unsigned long aim_sendauthresp(struct aim_session_t *sess, | |
329 | struct aim_conn_t *conn, | |
330 | char *sn, char *bosip, | |
331 | char *cookie, char *email, | |
332 | int regstatus) | |
333 | { | |
334 | struct command_tx_struct *tx; | |
335 | struct aim_tlvlist_t *tlvlist = NULL; | |
336 | ||
337 | if (!(tx = aim_tx_new(AIM_FRAMETYPE_OSCAR, 0x0004, conn, 1152))) | |
338 | return -1; | |
339 | ||
340 | tx->lock = 1; | |
341 | ||
342 | if (sn) | |
343 | aim_addtlvtochain_str(&tlvlist, 0x0001, sn, strlen(sn)); | |
344 | else | |
345 | aim_addtlvtochain_str(&tlvlist, 0x0001, sess->logininfo.screen_name, strlen(sess->logininfo.screen_name)); | |
346 | ||
347 | if (sess->logininfo.errorcode) { | |
348 | aim_addtlvtochain16(&tlvlist, 0x0008, sess->logininfo.errorcode); | |
349 | aim_addtlvtochain_str(&tlvlist, 0x0004, sess->logininfo.errorurl, strlen(sess->logininfo.errorurl)); | |
350 | } else { | |
351 | aim_addtlvtochain_str(&tlvlist, 0x0005, bosip, strlen(bosip)); | |
352 | aim_addtlvtochain_str(&tlvlist, 0x0006, cookie, AIM_COOKIELEN); | |
353 | aim_addtlvtochain_str(&tlvlist, 0x0011, email, strlen(email)); | |
354 | aim_addtlvtochain16(&tlvlist, 0x0013, regstatus); | |
355 | } | |
356 | ||
357 | tx->commandlen = aim_writetlvchain(tx->data, tx->commandlen, &tlvlist); | |
358 | tx->lock = 0; | |
359 | return aim_tx_enqueue(sess, tx); | |
360 | } | |
361 | ||
362 | /* | |
363 | * Generate a random cookie. (Non-client use only) | |
364 | */ | |
365 | int aim_gencookie(unsigned char *buf) | |
366 | { | |
367 | int i; | |
368 | ||
369 | srand(time(NULL)); | |
370 | ||
371 | for (i=0; i < AIM_COOKIELEN; i++) | |
372 | buf[i] = 1+(int) (256.0*rand()/(RAND_MAX+0.0)); | |
373 | ||
374 | return i; | |
375 | } | |
376 | ||
377 | /* | |
378 | * Send Server Ready. (Non-client) | |
379 | */ | |
380 | int aim_sendserverready(struct aim_session_t *sess, struct aim_conn_t *conn) | |
381 | { | |
382 | struct command_tx_struct *tx; | |
383 | int i = 0; | |
384 | ||
385 | if (!(tx = aim_tx_new(AIM_FRAMETYPE_OSCAR, 0x0002, conn, 10+0x22))) | |
386 | return -1; | |
387 | ||
388 | tx->lock = 1; | |
389 | ||
390 | i += aim_putsnac(tx->data, 0x0001, 0x0003, 0x0000, sess->snac_nextid++); | |
391 | ||
392 | i += aimutil_put16(tx->data+i, 0x0001); | |
393 | i += aimutil_put16(tx->data+i, 0x0002); | |
394 | i += aimutil_put16(tx->data+i, 0x0003); | |
395 | i += aimutil_put16(tx->data+i, 0x0004); | |
396 | i += aimutil_put16(tx->data+i, 0x0006); | |
397 | i += aimutil_put16(tx->data+i, 0x0008); | |
398 | i += aimutil_put16(tx->data+i, 0x0009); | |
399 | i += aimutil_put16(tx->data+i, 0x000a); | |
400 | i += aimutil_put16(tx->data+i, 0x000b); | |
401 | i += aimutil_put16(tx->data+i, 0x000c); | |
402 | i += aimutil_put16(tx->data+i, 0x0013); | |
403 | i += aimutil_put16(tx->data+i, 0x0015); | |
404 | ||
405 | tx->commandlen = i; | |
406 | tx->lock = 0; | |
407 | return aim_tx_enqueue(sess, tx); | |
408 | } | |
409 | ||
410 | ||
411 | /* | |
412 | * Send service redirect. (Non-Client) | |
413 | */ | |
414 | unsigned long aim_sendredirect(struct aim_session_t *sess, | |
415 | struct aim_conn_t *conn, | |
416 | unsigned short servid, | |
417 | char *ip, | |
418 | char *cookie) | |
419 | { | |
420 | struct command_tx_struct *tx; | |
421 | struct aim_tlvlist_t *tlvlist = NULL; | |
422 | int i = 0; | |
423 | ||
424 | if (!(tx = aim_tx_new(AIM_FRAMETYPE_OSCAR, 0x0002, conn, 1152))) | |
425 | return -1; | |
426 | ||
427 | tx->lock = 1; | |
428 | ||
429 | i += aim_putsnac(tx->data+i, 0x0001, 0x0005, 0x0000, 0x00000000); | |
430 | ||
431 | aim_addtlvtochain16(&tlvlist, 0x000d, servid); | |
432 | aim_addtlvtochain_str(&tlvlist, 0x0005, ip, strlen(ip)); | |
433 | aim_addtlvtochain_str(&tlvlist, 0x0006, cookie, AIM_COOKIELEN); | |
434 | ||
435 | tx->commandlen = aim_writetlvchain(tx->data+i, tx->commandlen-i, &tlvlist)+i; | |
436 | aim_freetlvchain(&tlvlist); | |
437 | ||
438 | tx->lock = 0; | |
439 | return aim_tx_enqueue(sess, tx); | |
440 | } |