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