#include <u.h>#include <libc.h>#include <authsrv.h>#include <libsec.h> extern int form1B2M(char *ap, int n, uchar key[32]); intconvT2M(Ticket *f, char *ap, int n, Authkey *key){	uchar *p; 	if(n < 1+CHALLEN+2*ANAMELEN)		return 0; 	p = (uchar*)ap;	*p++ = f->num;	memmove(p, f->chal, CHALLEN), p += CHALLEN;	memmove(p, f->cuid, ANAMELEN), p += ANAMELEN;	memmove(p, f->suid, ANAMELEN), p += ANAMELEN;	switch(f->form){	case 0:		if(n < 1+CHALLEN+2*ANAMELEN+DESKEYLEN)			return 0; 		memmove(p, f->key, DESKEYLEN), p += DESKEYLEN;		n = p - (uchar*)ap;		encrypt(key->des, ap, n);		return n;	case 1:		if(n < 12+CHALLEN+2*ANAMELEN+NONCELEN+16)			return 0; 		memmove(p, f->key, NONCELEN), p += NONCELEN;		return form1B2M(ap, p - (uchar*)ap, key->pakkey);	} 	return 0;}