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#include <u.h>
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#include <libc.h>
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#include <authsrv.h>
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#include <bio.h>
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#include "authcmdlib.h"
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static char *pbmsg = "AS protocol botch";
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int
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asrdresp(int fd, char *buf, int len)
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{
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	char error[AERRLEN];
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	if(read(fd, buf, 1) != 1){
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		werrstr(pbmsg);
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		return -1;
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	}
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	switch(buf[0]){
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	case AuthOK:
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		if(readn(fd, buf, len) < 0){
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			werrstr(pbmsg);
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			return -1;
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		}
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		break;
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	case AuthErr:
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		if(readn(fd, error, AERRLEN) < 0){
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			werrstr(pbmsg);
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			return -1;
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		}
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		error[AERRLEN-1] = 0;
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		werrstr(error);
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		return -1;
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	default:
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		werrstr(pbmsg);
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		return -1;
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	}
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	return 0;
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}
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void
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main(int argc, char **argv)
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{
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	int fd;
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	Ticketreq tr;
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	Ticket t;
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	Passwordreq pr;
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	char tbuf[TICKETLEN];
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	char key[DESKEYLEN];
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	char buf[512];
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	char *s, *user;
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	user = getuser();
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	ARGBEGIN{
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	}ARGEND
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	s = nil;
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	if(argc > 0){
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		user = argv[0];
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		s = strchr(user, '@');
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		if(s != nil)
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			*s++ = 0;
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		if(*user == 0)
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			user = getuser();
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	}
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	fd = authdial(nil, s);
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	if(fd < 0)
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		error("protocol botch: %r");
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	/* send ticket request to AS */
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	memset(&tr, 0, sizeof(tr));
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	strcpy(tr.uid, user);
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	tr.type = AuthPass;
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	convTR2M(&tr, buf);
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	if(write(fd, buf, TICKREQLEN) != TICKREQLEN)
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		error("protocol botch: %r");
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	if(asrdresp(fd, buf, TICKETLEN) < 0)
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		error("%r");
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	memmove(tbuf, buf, TICKETLEN);
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	/*
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	 *  get a password from the user and try to decrypt the
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	 *  ticket.  If it doesn't work we've got a bad password,
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	 *  give up.
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	 */
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	readln("Plan 9 Password: ", pr.old, sizeof pr.old, 1);
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	passtokey(key, pr.old);
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	convM2T(tbuf, &t, key);
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	if(t.num != AuthTp || strcmp(t.cuid, tr.uid))
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		error("bad password");
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	/* loop trying new passwords */
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	for(;;){
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		pr.changesecret = 0;
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		*pr.new = 0;
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		readln("change Plan 9 Password? (y/n) ", buf, sizeof buf, 0);
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		if(*buf == 'y' || *buf == 'Y'){
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			readln("Password(8 to 31 characters): ", pr.new,
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				sizeof pr.new, 1);
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			readln("Confirm: ", buf, sizeof buf, 1);
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			if(strcmp(pr.new, buf)){
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				print("!mismatch\n");
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				continue;
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			}
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		}
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		readln("change Inferno/POP password? (y/n) ", buf, sizeof buf, 0);
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		if(*buf == 'y' || *buf == 'Y'){
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			pr.changesecret = 1;
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			readln("make it the same as your plan 9 password? (y/n) ",
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				buf, sizeof buf, 0);
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			if(*buf == 'y' || *buf == 'Y'){
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				if(*pr.new == 0)
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					strcpy(pr.secret, pr.old);
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				else
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					strcpy(pr.secret, pr.new);
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			} else {
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				readln("Secret(0 to 256 characters): ", pr.secret,
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					sizeof pr.secret, 1);
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				readln("Confirm: ", buf, sizeof buf, 1);
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				if(strcmp(pr.secret, buf)){
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					print("!mismatch\n");
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					continue;
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				}
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			}
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		}
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		pr.num = AuthPass;
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		convPR2M(&pr, buf, t.key);
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		if(write(fd, buf, PASSREQLEN) != PASSREQLEN)
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			error("AS protocol botch: %r");
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		if(asrdresp(fd, buf, 0) == 0)
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			break;
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		fprint(2, "passwd: refused: %r\n");
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	}
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	close(fd);
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	exits(0);
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}