ref: e71d63cae5e8311ba172328b992b3e4ca8f47fb5
dir: /libauthsrv/convA2M.c/
#include <u.h> #include <libc.h> #include <authsrv.h> extern int form1B2M(char *ap, int n, uchar key[32]); int convA2M(Authenticator *f, char *ap, int n, Ticket *t) { uchar *p; if(n < 1+CHALLEN) return 0; p = (uchar*)ap; *p++ = f->num; memmove(p, f->chal, CHALLEN), p += CHALLEN; switch(t->form){ case 0: if(n < 1+CHALLEN+4) return 0; memset(p, 0, 4), p += 4; /* unused id field */ n = p - (uchar*)ap; encrypt(t->key, ap, n); return n; case 1: if(n < 12+CHALLEN+NONCELEN+16) return 0; memmove(p, f->rand, NONCELEN), p += NONCELEN; return form1B2M(ap, (char*)p - ap, t->key); } return 0; }