52 lines
1021 B
C
52 lines
1021 B
C
#include <u.h>
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#include <lib9.h>
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#include <authsrv.h>
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extern int form1check(char *ap, int n);
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extern int form1M2B(char *ap, int n, uint8_t key[32]);
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int
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convM2T(char *ap, int n, Ticket *f, Authkey *k)
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{
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uint8_t buf[MAXTICKETLEN], *p;
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int m;
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if(f != nil)
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memset(f, 0, sizeof(Ticket));
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if(n < 8)
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return -8;
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if(form1check(ap, n) < 0){
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m = 1+CHALLEN+2*ANAMELEN+DESKEYLEN;
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if(n < m)
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return -m;
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if(f == nil || k == nil)
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return m;
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f->form = 0;
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memmove(buf, ap, m);
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decrypt(k->des, buf, m);
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} else {
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m = 12+CHALLEN+2*ANAMELEN+NONCELEN+16;
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if(n < m)
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return -m;
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if(f == nil || k == nil)
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return m;
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f->form = 1;
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memmove(buf, ap, m);
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if(form1M2B((char*)buf, m, k->pakkey) < 0)
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return m;
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}
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p = buf;
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f->num = *p++;
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memmove(f->chal, p, CHALLEN), p += CHALLEN;
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memmove(f->cuid, p, ANAMELEN), p += ANAMELEN;
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memmove(f->suid, p, ANAMELEN), p += ANAMELEN;
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memmove(f->key, p, f->form == 0 ? DESKEYLEN : NONCELEN);
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f->cuid[ANAMELEN-1] = 0;
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f->suid[ANAMELEN-1] = 0;
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return m;
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}
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