telnet/libtelnet/enc_des.c

492 fb64_stream_iv(Block seed, struct stinfo *stp)
495 	memmove((void *)stp->str_iv, (void *)seed, sizeof(Block));
496 	memmove((void *)stp->str_output, (void *)seed, sizeof(Block));
498 	des_key_sched((Block *)stp->str_ikey, stp->str_sched);
500 	stp->str_index = sizeof(Block);
504 fb64_stream_key(Block key, struct stinfo *stp)
506 	memmove((void *)stp->str_ikey, (void *)key, sizeof(Block));
507 	des_key_sched((Block *)key, stp->str_sched);
509 	memmove((void *)stp->str_output, (void *)stp->str_iv, sizeof(Block));
511 	stp->str_index = sizeof(Block);
539 	struct stinfo *stp = &fb[CFB].streams[DIR_ENCRYPT-1];
542 	idx = stp->str_index;
546 			des_ecb_encrypt((Block *)stp->str_output, (Block *)b, stp->str_sched, 1);
547 			memmove((void *)stp->str_feed, (void *)b, sizeof(Block));
552 		*s = stp->str_output[idx] = (stp->str_feed[idx] ^ *s);
556 	stp->str_index = idx;
562 	struct stinfo *stp = &fb[CFB].streams[DIR_DECRYPT-1];
571 		if (stp->str_index)
572 			--stp->str_index;
576 	idx = stp->str_index++;
579 		des_ecb_encrypt((Block *)stp->str_output, (Block *)b, stp->str_sched, 1);
580 		memmove((void *)stp->str_feed, (void *)b, sizeof(Block));
581 		stp->str_index = 1;	/* Next time will be 1 */
586 	stp->str_output[idx] = data;
587 	return(data ^ stp->str_feed[idx]);
612 	struct stinfo *stp = &fb[OFB].streams[DIR_ENCRYPT-1];
615 	idx = stp->str_index;
619 			des_ecb_encrypt((Block *)stp->str_feed, (Block *)b, stp->str_sched, 1);
620 			memmove((void *)stp->str_feed, (void *)b, sizeof(Block));
623 		*s++ ^= stp->str_feed[idx];
626 	stp->str_index = idx;
632 	struct stinfo *stp = &fb[OFB].streams[DIR_DECRYPT-1];
641 		if (stp->str_index)
642 			--stp->str_index;
646 	idx = stp->str_index++;
649 		des_ecb_encrypt((Block *)stp->str_feed, (Block *)b, stp->str_sched, 1);
650 		memmove((void *)stp->str_feed, (void *)b, sizeof(Block));
651 		stp->str_index = 1;	/* Next time will be 1 */
655 	return(data ^ stp->str_feed[idx]);