Files
jehanne/sys/src/lib/authsrv/convM2A.c
Giacomo Tesio e70feee4a3 libc: introduce "jehanne_" namespace
With this commit all functions declared in libc.h have been renamed
with the "jehanne_" prefix. This is done for several reason:

- it removes conflicts during symbol resolution when linking
  standard C libraries like newlib or musl
- it allows programs depending on a standard C library to directly
  link to a library depending on our non standard libc (eg libsec).

To ease transiction two files are provided:

- sys/include/lib9.h that can be included instead of <libc.h> to use
  the old names (via a simple set of macros)
- sys/src/lib/c/lib9.c that can be compiled with a program where the
  macro provided by lib9.h are too dumb (see for example rc or grep).

In the kernel port/lib.h has been modified accordingly and some of
the functions it directly provides has been renamed too (eg malloc
in qmalloc.c and print in devcons.c).
2017-04-19 23:48:21 +02:00

37 lines
649 B
C

#include <u.h>
#include <lib9.h>
#include <authsrv.h>
extern int form1M2B(char *ap, int n, uint8_t key[32]);
int
convM2A(char *ap, int n, Authenticator *f, Ticket *t)
{
uint8_t 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;
}