60643d379b
(Including all changes for FreeBSD - importing the original eBones distribution would be too complex at this stage, since I don't have access to Piero's CVS.) (If you want to include eBones in your system, don't forget to include MAKE_EBONES in /etc/make.conf.) (This stuff is now also suppable from braae.ru.ac.za.) Bones originally from MIT SIPB. Original port to FreeBSD 1.x by Piero Serini. Moved to FreeBSD 2.0 by Doug Rabson and Geoff Rehmet. Nice bug fixes from Doug Rabson.
124 lines
4.0 KiB
C
124 lines
4.0 KiB
C
/*
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* Copyright 1985, 1986, 1987, 1988 by the Massachusetts Institute
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* of Technology.
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* For copying and distribution information, please see the file
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* <Copyright.MIT>.
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*
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* from: decomp_ticket.c,v 4.12 89/05/16 18:44:46 jtkohl Exp $
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* $Id: decomp_ticket.c,v 1.2 1994/07/19 19:25:05 g89r4222 Exp $
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*/
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#ifndef lint
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static char *rcsid =
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"$Id: decomp_ticket.c,v 1.2 1994/07/19 19:25:05 g89r4222 Exp $";
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#endif /* lint */
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#include <stdio.h>
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#include <des.h>
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#include <krb.h>
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#include <prot.h>
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#include <strings.h>
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/*
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* This routine takes a ticket and pointers to the variables that
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* should be filled in based on the information in the ticket. It
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* fills in values for its arguments.
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*
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* Note: if the client realm field in the ticket is the null string,
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* then the "prealm" variable is filled in with the local realm (as
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* defined by KRB_REALM).
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*
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* If the ticket byte order is different than the host's byte order
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* (as indicated by the byte order bit of the "flags" field), then
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* the KDC timestamp "time_sec" is byte-swapped. The other fields
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* potentially affected by byte order, "paddress" and "session" are
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* not byte-swapped.
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*
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* The routine returns KFAILURE if any of the "pname", "pinstance",
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* or "prealm" fields is too big, otherwise it returns KSUCCESS.
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*
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* The corresponding routine to generate tickets is create_ticket.
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* When changes are made to this routine, the corresponding changes
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* should also be made to that file.
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*
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* See create_ticket.c for the format of the ticket packet.
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*/
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decomp_ticket(tkt, flags, pname, pinstance, prealm, paddress, session,
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life, time_sec, sname, sinstance, key, key_s)
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KTEXT tkt; /* The ticket to be decoded */
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unsigned char *flags; /* Kerberos ticket flags */
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char *pname; /* Authentication name */
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char *pinstance; /* Principal's instance */
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char *prealm; /* Principal's authentication domain */
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unsigned long *paddress; /* Net address of entity
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* requesting ticket */
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C_Block session; /* Session key inserted in ticket */
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int *life; /* Lifetime of the ticket */
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unsigned long *time_sec; /* Issue time and date */
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char *sname; /* Service name */
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char *sinstance; /* Service instance */
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C_Block key; /* Service's secret key
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* (to decrypt the ticket) */
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Key_schedule key_s; /* The precomputed key schedule */
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{
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static int tkt_swap_bytes;
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unsigned char *uptr;
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char *ptr = (char *)tkt->dat;
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#ifndef NOENCRYPTION
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pcbc_encrypt((C_Block *)tkt->dat,(C_Block *)tkt->dat,(long)tkt->length,
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key_s,key,DECRYPT);
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#endif /* ! NOENCRYPTION */
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*flags = *ptr; /* get flags byte */
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ptr += sizeof(*flags);
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tkt_swap_bytes = 0;
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if (HOST_BYTE_ORDER != ((*flags >> K_FLAG_ORDER)& 1))
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tkt_swap_bytes++;
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if (strlen(ptr) > ANAME_SZ)
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return(KFAILURE);
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(void) strcpy(pname,ptr); /* pname */
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ptr += strlen(pname) + 1;
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if (strlen(ptr) > INST_SZ)
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return(KFAILURE);
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(void) strcpy(pinstance,ptr); /* instance */
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ptr += strlen(pinstance) + 1;
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if (strlen(ptr) > REALM_SZ)
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return(KFAILURE);
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(void) strcpy(prealm,ptr); /* realm */
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ptr += strlen(prealm) + 1;
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/* temporary hack until realms are dealt with properly */
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if (*prealm == 0)
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(void) strcpy(prealm,KRB_REALM);
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bcopy(ptr,(char *)paddress,4); /* net address */
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ptr += 4;
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bcopy(ptr,(char *)session,8); /* session key */
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ptr+= 8;
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#ifdef notdef /* DONT SWAP SESSION KEY spm 10/22/86 */
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if (tkt_swap_bytes)
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swap_C_Block(session);
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#endif
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/* get lifetime, being certain we don't get negative lifetimes */
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uptr = (unsigned char *) ptr++;
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*life = (int) *uptr;
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bcopy(ptr,(char *) time_sec,4); /* issue time */
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ptr += 4;
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if (tkt_swap_bytes)
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swap_u_long(*time_sec);
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(void) strcpy(sname,ptr); /* service name */
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ptr += 1 + strlen(sname);
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(void) strcpy(sinstance,ptr); /* instance */
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ptr += 1 + strlen(sinstance);
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return(KSUCCESS);
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}
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