117 lines
3.7 KiB
C
117 lines
3.7 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: create_auth_reply.c,v 4.10 89/01/13 17:47:38 steiner Exp $
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* $Id: create_auth_reply.c,v 1.1.1.1 1994/09/30 14:49:59 csgr Exp $
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*/
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#ifndef lint
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static char *rcsid =
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"$Id: create_auth_reply.c,v 1.1.1.1 1994/09/30 14:49:59 csgr Exp $";
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#endif /* lint */
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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 is called by the Kerberos authentication server
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* to create a reply to an authentication request. The routine
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* takes the user's name, instance, and realm, the client's
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* timestamp, the number of tickets, the user's key version
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* number and the ciphertext containing the tickets themselves.
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* It constructs a packet and returns a pointer to it.
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*
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* Notes: The packet returned by this routine is static. Thus, if you
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* intend to keep the result beyond the next call to this routine, you
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* must copy it elsewhere.
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*
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* The packet is built in the following format:
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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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* unsigned char KRB_PROT_VERSION protocol version number
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*
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* unsigned char AUTH_MSG_KDC_REPLY protocol message type
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*
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* [least significant HOST_BYTE_ORDER sender's (server's) byte
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* bit of above field] order
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*
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* string pname principal's name
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*
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* string pinst principal's instance
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*
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* string prealm principal's realm
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*
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* unsigned long time_ws client's timestamp
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*
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* unsigned char n number of tickets
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*
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* unsigned long x_date expiration date
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*
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* unsigned char kvno master key version
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*
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* short w_1 cipher length
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*
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* --- cipher->dat cipher data
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*/
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KTEXT
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create_auth_reply(pname,pinst,prealm,time_ws,n,x_date,kvno,cipher)
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char *pname; /* Principal's name */
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char *pinst; /* Principal's instance */
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char *prealm; /* Principal's authentication domain */
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long time_ws; /* Workstation time */
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int n; /* Number of tickets */
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unsigned long x_date; /* Principal's expiration date */
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int kvno; /* Principal's key version number */
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KTEXT cipher; /* Cipher text with tickets and
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* session keys */
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{
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static KTEXT_ST pkt_st;
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KTEXT pkt = &pkt_st;
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unsigned char *v = pkt->dat; /* Prot vers number */
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unsigned char *t = (pkt->dat+1); /* Prot message type */
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short w_l; /* Cipher length */
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/* Create fixed part of packet */
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*v = (unsigned char) KRB_PROT_VERSION;
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*t = (unsigned char) AUTH_MSG_KDC_REPLY;
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*t |= HOST_BYTE_ORDER;
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if (n != 0)
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*v = 3;
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/* Add the basic info */
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(void) strcpy((char *) (pkt->dat+2), pname);
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pkt->length = 3 + strlen(pname);
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(void) strcpy((char *) (pkt->dat+pkt->length),pinst);
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pkt->length += 1 + strlen(pinst);
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(void) strcpy((char *) (pkt->dat+pkt->length),prealm);
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pkt->length += 1 + strlen(prealm);
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/* Workstation timestamp */
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bcopy((char *) &time_ws, (char *) (pkt->dat+pkt->length), 4);
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pkt->length += 4;
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*(pkt->dat+(pkt->length)++) = (unsigned char) n;
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/* Expiration date */
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bcopy((char *) &x_date, (char *) (pkt->dat+pkt->length),4);
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pkt->length += 4;
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/* Now send the ciphertext and info to help decode it */
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*(pkt->dat+(pkt->length)++) = (unsigned char) kvno;
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w_l = (short) cipher->length;
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bcopy((char *) &w_l,(char *) (pkt->dat+pkt->length),2);
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pkt->length += 2;
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bcopy((char *) (cipher->dat), (char *) (pkt->dat+pkt->length),
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cipher->length);
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pkt->length += cipher->length;
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/* And return the packet */
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return pkt;
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}
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