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Annotation of 43BSDReno/kerberosIV/krb/pkt_clen.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * $Source: /usr/src/kerberosIV/krb/RCS/pkt_clen.c,v $
                      3:  * $Author: kfall $
                      4:  *
                      5:  * Copyright 1985, 1986, 1987, 1988 by the Massachusetts Institute
                      6:  * of Technology.
                      7:  *
                      8:  * For copying and distribution information, please see the file
                      9:  * <mit-copyright.h>.
                     10:  */
                     11: 
                     12: #ifndef lint
                     13: static char *rcsid_pkt_clen_c =
                     14: "$Header: /usr/src/kerberosIV/krb/RCS/pkt_clen.c,v 4.8 90/06/25 20:57:05 kfall Exp $";
                     15: #endif /* lint */
                     16: 
                     17: #include <mit-copyright.h>
                     18: #include <des.h>
                     19: #include <krb.h>
                     20: #include <prot.h>
                     21: 
                     22: extern int krb_debug;
                     23: extern int swap_bytes;
                     24: 
                     25: /*
                     26:  * Given a pointer to an AUTH_MSG_KDC_REPLY packet, return the length of
                     27:  * its ciphertext portion.  The external variable "swap_bytes" is assumed
                     28:  * to have been set to indicate whether or not the packet is in local
                     29:  * byte order.  pkt_clen() takes this into account when reading the
                     30:  * ciphertext length out of the packet.
                     31:  */
                     32: 
                     33: pkt_clen(pkt)
                     34:     KTEXT pkt;
                     35: {
                     36:     static unsigned short temp,temp2;
                     37:     int clen = 0;
                     38: 
                     39:     /* Start of ticket list */
                     40:     unsigned char *ptr = pkt_a_realm(pkt) + 10
                     41:        + strlen((char *)pkt_a_realm(pkt));
                     42: 
                     43:     /* Finally the length */
                     44:     bcopy((char *)(++ptr),(char *)&temp,2); /* alignment */
                     45:     if (swap_bytes) {
                     46:         /* assume a short is 2 bytes?? */
                     47:         swab((char *)&temp,(char *)&temp2,2);
                     48:         temp = temp2;
                     49:     }
                     50: 
                     51:     clen = (int) temp;
                     52: 
                     53:     if (krb_debug)
                     54:        printf("Clen is %d\n",clen);
                     55:     return(clen);
                     56: }

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