#include <u.h>#include <libc.h>#include <authsrv.h> extern int form1M2B(char *ap, int n, uchar key[32]); intconvM2PR(char *ap, int n, Passwordreq *f, Ticket *t){	uchar *p, buf[MAXPASSREQLEN];	int m; 	memset(f, 0, sizeof(Passwordreq));	if(t->form == 0){		m = 1+2*PASSWDLEN+1+SECRETLEN;		if(n < m)			return -m;		memmove(buf, ap, m);		decrypt(t->key, buf, m);	} else {		m = 12+2*PASSWDLEN+1+SECRETLEN+16;		if(n < m)			return -m;		memmove(buf, ap, m);		if(form1M2B((char*)buf, m, t->key) < 0)			return m;	}	p = buf;	f->num = *p++;	memmove(f->old, p, PASSWDLEN), p += PASSWDLEN;	memmove(f->new, p, PASSWDLEN), p += PASSWDLEN;	f->changesecret = *p++;	memmove(f->secret, p, SECRETLEN);	f->old[PASSWDLEN-1] = 0;	f->new[PASSWDLEN-1] = 0;	f->secret[SECRETLEN-1] = 0; 	return m;}