146 void fb64_init(struct fb *fbp)  in fb64_init()  argument
148 	memset(fbp,0, sizeof(*fbp));  in fb64_init()
149 	fbp->state[0] = fbp->state[1] = FAILED;  in fb64_init()
150 	fbp->fb_feed[0] = IAC;  in fb64_init()
151 	fbp->fb_feed[1] = SB;  in fb64_init()
152 	fbp->fb_feed[2] = TELOPT_ENCRYPT;  in fb64_init()
153 	fbp->fb_feed[3] = ENCRYPT_IS;  in fb64_init()
174 static int fb64_start(struct fb *fbp, int dir, int server)  in fb64_start()  argument
187 		state = fbp->state[dir-1];  in fb64_start()
193 		state = fbp->state[dir-1];  in fb64_start()
200 		if (!VALIDKEY(fbp->krbdes_key)) {  in fb64_start()
201 		        fbp->need_start = 1;  in fb64_start()
213 		    if (RAND_bytes(fbp->temp_feed,  in fb64_start()
214 				   sizeof(*fbp->temp_feed)) != 1)  in fb64_start()
216 		    DES_set_odd_parity(&fbp->temp_feed);  in fb64_start()
217 		} while(DES_is_weak_key(&fbp->temp_feed));  in fb64_start()
219 		p = fbp->fb_feed + 3;  in fb64_start()
224 			if ((*p++ = fbp->temp_feed[x]) == IAC)  in fb64_start()
229 		printsub('>', &fbp->fb_feed[2], p - &fbp->fb_feed[2]);  in fb64_start()
230 		telnet_net_write(fbp->fb_feed, p - fbp->fb_feed);  in fb64_start()
235 	return(fbp->state[dir-1] = state);  in fb64_start()
256 int fb64_is(unsigned char *data, int cnt, struct fb *fbp)  in fb64_is()  argument
259 	int state = fbp->state[DIR_DECRYPT-1];  in fb64_is()
279 		fb64_stream_iv(data, &fbp->streams[DIR_DECRYPT-1]);  in fb64_is()
281 		p = fbp->fb_feed + 3;  in fb64_is()
287 		printsub('>', &fbp->fb_feed[2], p - &fbp->fb_feed[2]);  in fb64_is()
288 		telnet_net_write(fbp->fb_feed, p - fbp->fb_feed);  in fb64_is()
290 		state = fbp->state[DIR_DECRYPT-1] = IN_PROGRESS;  in fb64_is()
306 		p = fbp->fb_feed + 3;  in fb64_is()
312 		printsub('>', &fbp->fb_feed[2], p - &fbp->fb_feed[2]);  in fb64_is()
313 		telnet_net_write(fbp->fb_feed, p - fbp->fb_feed);  in fb64_is()
317 	return(fbp->state[DIR_DECRYPT-1] = state);  in fb64_is()
338 int fb64_reply(unsigned char *data, int cnt, struct fb *fbp)  in fb64_reply()  argument
340 	int state = fbp->state[DIR_ENCRYPT-1];  in fb64_reply()
347 		fb64_stream_iv(fbp->temp_feed, &fbp->streams[DIR_ENCRYPT-1]);  in fb64_reply()
355 		memset(fbp->temp_feed, 0, sizeof(DES_cblock));  in fb64_reply()
356 		fb64_stream_iv(fbp->temp_feed, &fbp->streams[DIR_ENCRYPT-1]);  in fb64_reply()
371 	return(fbp->state[DIR_ENCRYPT-1] = state);  in fb64_reply()
384 static void fb64_session(Session_Key *key, int server, struct fb *fbp)  in fb64_session()  argument
393 	memcpy(fbp->krbdes_key, key->data, sizeof(DES_cblock));  in fb64_session()
395 	fb64_stream_key(fbp->krbdes_key, &fbp->streams[DIR_ENCRYPT-1]);  in fb64_session()
396 	fb64_stream_key(fbp->krbdes_key, &fbp->streams[DIR_DECRYPT-1]);  in fb64_session()
400 	DES_set_key_checked((DES_cblock *)&fbp->krbdes_key,  in fb64_session()
401 			    &fbp->krbdes_sched);  in fb64_session()
406 	if (fbp->need_start) {  in fb64_session()
407 		fbp->need_start = 0;  in fb64_session()
408 		fb64_start(fbp, DIR_ENCRYPT, server);  in fb64_session()
427 int fb64_keyid(int dir, unsigned char *kp, int *lenp, struct fb *fbp)  in fb64_keyid()  argument
429 	int state = fbp->state[dir-1];  in fb64_keyid()
441 	return(fbp->state[dir-1] = state);  in fb64_keyid()