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d79d4a7ced
- Get all functions prototyped or at least defined before use.
- Make code compile (Mostly) clean with -Wall set
- Start to reduce the degree to which DES aka libdes is built in.
- get all functions to the same uniform standard of definition:
int
foo(a, b)
int a;
int *b;
{
:
}
- fix numerous bugs exposed by above processes.
Note - this replaces the previous work which used an unpopular function
definition style.
113 lines
2.9 KiB
C
113 lines
2.9 KiB
C
/*
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* Copyright 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: create_ciph.c,v 4.8 89/05/18 21:24:26 jis Exp $
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* $Id: create_ciph.c,v 1.3 1995/07/18 16:38:07 mark Exp $
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*/
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#if 0
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#ifndef lint
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static char *rcsid =
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"$Id: create_ciph.c,v 1.3 1995/07/18 16:38:07 mark Exp $";
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#endif /* lint */
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#endif
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#include <krb.h>
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#include <des.h>
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#include <strings.h>
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/*
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* This routine is used by the authentication server to create
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* a packet for its client, containing a ticket for the requested
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* service (given in "tkt"), and some information about the ticket,
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*
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* Returns KSUCCESS no matter what.
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*
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* The length of the cipher is stored in c->length; the format of
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* c->dat is as follows:
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*
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* variable
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* type or constant data
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* ---- ----------- ----
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*
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*
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* 8 bytes session session key for client, service
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*
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* string service service name
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*
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* string instance service instance
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*
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* string realm KDC realm
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*
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* unsigned char life ticket lifetime
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*
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* unsigned char kvno service key version number
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*
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* unsigned char tkt->length length of following ticket
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*
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* data tkt->dat ticket for service
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*
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* 4 bytes kdc_time KDC's timestamp
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*
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* <=7 bytes null null pad to 8 byte multiple
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*
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*/
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int
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create_ciph(c, session, service, instance, realm, life, kvno, tkt,
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kdc_time, key)
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KTEXT c; /* Text block to hold ciphertext */
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C_Block session; /* Session key to send to user */
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char *service; /* Service name on ticket */
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char *instance; /* Instance name on ticket */
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char *realm; /* Realm of this KDC */
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unsigned long life; /* Lifetime of the ticket */
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int kvno; /* Key version number for service */
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KTEXT tkt; /* The ticket for the service */
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unsigned long kdc_time; /* KDC time */
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C_Block key; /* Key to encrypt ciphertext with */
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{
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char *ptr;
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Key_schedule key_s;
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ptr = (char *) c->dat;
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bcopy((char *) session, ptr, 8);
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ptr += 8;
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(void) strcpy(ptr,service);
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ptr += strlen(service) + 1;
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(void) strcpy(ptr,instance);
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ptr += strlen(instance) + 1;
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(void) strcpy(ptr,realm);
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ptr += strlen(realm) + 1;
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*(ptr++) = (unsigned char) life;
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*(ptr++) = (unsigned char) kvno;
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*(ptr++) = (unsigned char) tkt->length;
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bcopy((char *)(tkt->dat),ptr,tkt->length);
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ptr += tkt->length;
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bcopy((char *) &kdc_time,ptr,4);
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ptr += 4;
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/* guarantee null padded encrypted data to multiple of 8 bytes */
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bzero(ptr, 7);
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c->length = (((ptr - (char *) c->dat) + 7) / 8) * 8;
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#ifndef NOENCRYPTION
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key_sched((C_Block *)key,key_s);
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pcbc_encrypt((C_Block *)c->dat,(C_Block *)c->dat,(long) c->length,key_s,
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(C_Block *)key,ENCRYPT);
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#endif /* NOENCRYPTION */
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return(KSUCCESS);
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}
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