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#include <u.h>
#include <libc.h>
#include <authsrv.h>
extern int form1B2M(char *ap, int n, uchar key[32]);
int
convPR2M(Passwordreq *f, char *ap, int n, Ticket *t)
{
uchar *p;
if(n < 1+2*PASSWDLEN+1+SECRETLEN)
return 0;
p = (uchar*)ap;
*p++ = f->num;
memmove(p, f->old, PASSWDLEN), p += PASSWDLEN;
memmove(p, f->new, PASSWDLEN), p += PASSWDLEN;
*p++ = f->changesecret;
memmove(p, f->secret, SECRETLEN), p += SECRETLEN;
switch(t->form){
case 0:
n = p - (uchar*)ap;
encrypt(t->key, ap, n);
return n;
case 1:
if(n < 12+2*PASSWDLEN+1+SECRETLEN+16)
return 0;
return form1B2M(ap, p - (uchar*)ap, t->key);
}
return 0;
}
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