40 lines
798 B
C
40 lines
798 B
C
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#include <u.h>
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#include <libc.h>
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#include <authsrv.h>
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#include <libsec.h>
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extern int form1B2M(char *ap, int n, uint8_t key[32]);
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int
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convT2M(Ticket *f, char *ap, int n, Authkey *key)
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{
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uint8_t *p;
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if(n < 1+CHALLEN+2*ANAMELEN)
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return 0;
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p = (uint8_t*)ap;
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*p++ = f->num;
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memmove(p, f->chal, CHALLEN), p += CHALLEN;
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memmove(p, f->cuid, ANAMELEN), p += ANAMELEN;
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memmove(p, f->suid, ANAMELEN), p += ANAMELEN;
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switch(f->form){
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case 0:
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if(n < 1+CHALLEN+2*ANAMELEN+DESKEYLEN)
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return 0;
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memmove(p, f->key, DESKEYLEN), p += DESKEYLEN;
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n = p - (uint8_t*)ap;
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encrypt(key->des, ap, n);
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return n;
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case 1:
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if(n < 12+CHALLEN+2*ANAMELEN+NONCELEN+16)
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return 0;
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memmove(p, f->key, NONCELEN), p += NONCELEN;
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return form1B2M(ap, p - (uint8_t*)ap, key->pakkey);
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}
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return 0;
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}
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