ref: 3e0e77a8521331412c96b6371622aa2f76d7aefc
dir: /sys/src/libauthsrv/convM2T.c/
#include <u.h> #include <libc.h> #include <authsrv.h> extern int form1check(char *ap, int n); extern int form1M2B(char *ap, int n, uchar key[32]); int convM2T(char *ap, int n, Ticket *f, Authkey *k) { uchar buf[MAXTICKETLEN], *p; int m; if(f != nil) memset(f, 0, sizeof(Ticket)); if(n < 8) return -8; if(form1check(ap, n) < 0){ m = 1+CHALLEN+2*ANAMELEN+DESKEYLEN; if(n < m) return -m; if(f == nil || k == nil) return m; f->form = 0; memmove(buf, ap, m); decrypt(k->des, buf, m); } else { m = 12+CHALLEN+2*ANAMELEN+NONCELEN+16; if(n < m) return -m; if(f == nil || k == nil) return m; f->form = 1; memmove(buf, ap, m); if(form1M2B((char*)buf, m, k->pakkey) < 0) return m; } p = buf; f->num = *p++; memmove(f->chal, p, CHALLEN), p += CHALLEN; memmove(f->cuid, p, ANAMELEN), p += ANAMELEN; memmove(f->suid, p, ANAMELEN), p += ANAMELEN; memmove(f->key, p, f->form == 0 ? DESKEYLEN : NONCELEN); f->cuid[ANAMELEN-1] = 0; f->suid[ANAMELEN-1] = 0; return m; }