121 static void chap_generate_challenge(struct chap_server_state *ss);
122 static void chap_handle_response(struct chap_server_state *ss, int code,
172 	struct chap_server_state *ss = &server;  in chap_lowerup()  local
175 	ss->flags |= LOWERUP;  in chap_lowerup()
176 	if (ss->flags & AUTH_STARTED)  in chap_lowerup()
177 		chap_timeout(ss);  in chap_lowerup()
184 	struct chap_server_state *ss = &server;  in chap_lowerdown()  local
187 	if (ss->flags & TIMEOUT_PENDING)  in chap_lowerdown()
188 		UNTIMEOUT(chap_timeout, ss);  in chap_lowerdown()
189 	ss->flags = 0;  in chap_lowerdown()
200 	struct chap_server_state *ss = &server;  in chap_auth_peer()  local
203 	if (ss->flags & AUTH_STARTED) {  in chap_auth_peer()
214 	ss->digest = dp;  in chap_auth_peer()
215 	ss->name = our_name;  in chap_auth_peer()
217 	ss->id = (unsigned char)(drand48() * 256);  in chap_auth_peer()
218 	ss->flags |= AUTH_STARTED;  in chap_auth_peer()
219 	if (ss->flags & LOWERUP)  in chap_auth_peer()
220 		chap_timeout(ss);  in chap_auth_peer()
257 	struct chap_server_state *ss = arg;  in chap_timeout()  local
259 	ss->flags &= ~TIMEOUT_PENDING;  in chap_timeout()
260 	if ((ss->flags & CHALLENGE_VALID) == 0) {  in chap_timeout()
261 		ss->challenge_xmits = 0;  in chap_timeout()
262 		chap_generate_challenge(ss);  in chap_timeout()
263 		ss->flags |= CHALLENGE_VALID;  in chap_timeout()
264 	} else if (ss->challenge_xmits >= chap_max_transmits) {  in chap_timeout()
265 		ss->flags &= ~CHALLENGE_VALID;  in chap_timeout()
266 		ss->flags |= AUTH_DONE | AUTH_FAILED;  in chap_timeout()
271 	output(0, ss->challenge, ss->challenge_pktlen);  in chap_timeout()
272 	++ss->challenge_xmits;  in chap_timeout()
273 	ss->flags |= TIMEOUT_PENDING;  in chap_timeout()
282 chap_generate_challenge(struct chap_server_state *ss)  in chap_generate_challenge()  argument
287 	p = ss->challenge;  in chap_generate_challenge()
290 	ss->digest->generate_challenge(p);  in chap_generate_challenge()
292 	nlen = strlen(ss->name);  in chap_generate_challenge()
293 	memcpy(p + 1 + clen, ss->name, nlen);  in chap_generate_challenge()
296 	ss->challenge_pktlen = PPP_HDRLEN + len;  in chap_generate_challenge()
298 	p = ss->challenge + PPP_HDRLEN;  in chap_generate_challenge()
300 	p[1] = ++ss->id;  in chap_generate_challenge()
309 chap_handle_response(struct chap_server_state *ss, int id,  in chap_handle_response()  argument
319 	if ((ss->flags & LOWERUP) == 0)  in chap_handle_response()
321 	if (id != ss->challenge[PPP_HDRLEN+1] || len < 2)  in chap_handle_response()
323 	if (ss->flags & CHALLENGE_VALID) {  in chap_handle_response()
331 		if (ss->flags & TIMEOUT_PENDING) {  in chap_handle_response()
332 			ss->flags &= ~TIMEOUT_PENDING;  in chap_handle_response()
333 			UNTIMEOUT(chap_timeout, ss);  in chap_handle_response()
348 		ok = (*verifier)(name, ss->name, id, ss->digest,  in chap_handle_response()
349 				 ss->challenge + PPP_HDRLEN + CHAP_HDRLEN,  in chap_handle_response()
350 				 response, ss->message, sizeof(ss->message));  in chap_handle_response()
352 			ss->flags |= AUTH_FAILED;  in chap_handle_response()
355 	} else if ((ss->flags & AUTH_DONE) == 0)  in chap_handle_response()
361 	mlen = strlen(ss->message);  in chap_handle_response()
363 	p[0] = (ss->flags & AUTH_FAILED)? CHAP_FAILURE: CHAP_SUCCESS;  in chap_handle_response()
368 		memcpy(p + CHAP_HDRLEN, ss->message, mlen);  in chap_handle_response()
371 	if (ss->flags & CHALLENGE_VALID) {  in chap_handle_response()
372 		ss->flags &= ~CHALLENGE_VALID;  in chap_handle_response()
373 		if (!(ss->flags & AUTH_DONE) && !(ss->flags & AUTH_FAILED)) {  in chap_handle_response()
385 			ss->flags |= AUTH_FAILED;  in chap_handle_response()
389 		if (ss->flags & AUTH_FAILED) {  in chap_handle_response()
392 			if ((ss->flags & AUTH_DONE) == 0)  in chap_handle_response()
394 						  ss->digest->code,  in chap_handle_response()
397 				ss->flags |= TIMEOUT_PENDING;  in chap_handle_response()
398 				TIMEOUT(chap_timeout, ss,  in chap_handle_response()
402 		ss->flags |= AUTH_DONE;  in chap_handle_response()
533 	struct chap_server_state *ss = &server;  in chap_input()  local
551 		chap_handle_response(ss, id, pkt, len);  in chap_input()
564 	struct chap_server_state *ss = &server;  in chap_protrej()  local
566 	if (ss->flags & TIMEOUT_PENDING) {  in chap_protrej()
567 		ss->flags &= ~TIMEOUT_PENDING;  in chap_protrej()
568 		UNTIMEOUT(chap_timeout, ss);  in chap_protrej()
570 	if (ss->flags & AUTH_STARTED) {  in chap_protrej()
571 		ss->flags = 0;  in chap_protrej()