ref: 728cb9011f9612e969ec8747aa1de2a30959c38a
dir: /sys/src/libauthsrv/convM2A.c/
#include <u.h> #include <libc.h> #include <authsrv.h> extern int form1M2B(char *ap, int n, uchar key[32]); int convM2A(char *ap, int n, Authenticator *f, Ticket *t) { uchar buf[MAXAUTHENTLEN], *p; int m; memset(f, 0, sizeof(Authenticator)); if(t->form == 0){ m = 1+CHALLEN+4; if(n < m) return -m; memmove(buf, ap, m); decrypt(t->key, buf, m); } else { m = 12+CHALLEN+NONCELEN+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->chal, p, CHALLEN); p += CHALLEN; if(t->form == 1) memmove(f->rand, p, NONCELEN); return m; }