home *** CD-ROM | disk | FTP | other *** search
- /*
- * $Source: /usr/src/kerberosIV/krb/RCS/create_auth_reply.c,v $
- * $Author: kfall $
- *
- * Copyright 1985, 1986, 1987, 1988 by the Massachusetts Institute
- * of Technology.
- *
- * For copying and distribution information, please see the file
- * <mit-copyright.h>.
- */
-
- #ifndef lint
- static char *rcsid_create_auth_reply_c =
- "$Header: /usr/src/kerberosIV/krb/RCS/create_auth_reply.c,v 4.11 90/06/25 20:55:20 kfall Exp $";
- #endif /* lint */
-
- #include <mit-copyright.h>
- #include <des.h>
- #include <krb.h>
- #include <prot.h>
- #include <strings.h>
-
- /*
- * This routine is called by the Kerberos authentication server
- * to create a reply to an authentication request. The routine
- * takes the user's name, instance, and realm, the client's
- * timestamp, the number of tickets, the user's key version
- * number and the ciphertext containing the tickets themselves.
- * It constructs a packet and returns a pointer to it.
- *
- * Notes: The packet returned by this routine is static. Thus, if you
- * intend to keep the result beyond the next call to this routine, you
- * must copy it elsewhere.
- *
- * The packet is built in the following format:
- *
- * variable
- * type or constant data
- * ---- ----------- ----
- *
- * unsigned char KRB_PROT_VERSION protocol version number
- *
- * unsigned char AUTH_MSG_KDC_REPLY protocol message type
- *
- * [least significant HOST_BYTE_ORDER sender's (server's) byte
- * bit of above field] order
- *
- * string pname principal's name
- *
- * string pinst principal's instance
- *
- * string prealm principal's realm
- *
- * unsigned long time_ws client's timestamp
- *
- * unsigned char n number of tickets
- *
- * unsigned long x_date expiration date
- *
- * unsigned char kvno master key version
- *
- * short w_1 cipher length
- *
- * --- cipher->dat cipher data
- */
-
- KTEXT
- create_auth_reply(pname,pinst,prealm,time_ws,n,x_date,kvno,cipher)
- char *pname; /* Principal's name */
- char *pinst; /* Principal's instance */
- char *prealm; /* Principal's authentication domain */
- long time_ws; /* Workstation time */
- int n; /* Number of tickets */
- unsigned long x_date; /* Principal's expiration date */
- int kvno; /* Principal's key version number */
- KTEXT cipher; /* Cipher text with tickets and
- * session keys */
- {
- static KTEXT_ST pkt_st;
- KTEXT pkt = &pkt_st;
- unsigned char *v = pkt->dat; /* Prot vers number */
- unsigned char *t = (pkt->dat+1); /* Prot message type */
- short w_l; /* Cipher length */
-
- /* Create fixed part of packet */
- *v = (unsigned char) KRB_PROT_VERSION;
- *t = (unsigned char) AUTH_MSG_KDC_REPLY;
- *t |= HOST_BYTE_ORDER;
-
- if (n != 0)
- *v = 3;
-
- /* Add the basic info */
- (void) strcpy((char *) (pkt->dat+2), pname);
- pkt->length = 3 + strlen(pname);
- (void) strcpy((char *) (pkt->dat+pkt->length),pinst);
- pkt->length += 1 + strlen(pinst);
- (void) strcpy((char *) (pkt->dat+pkt->length),prealm);
- pkt->length += 1 + strlen(prealm);
- /* Workstation timestamp */
- bcopy((char *) &time_ws, (char *) (pkt->dat+pkt->length), 4);
- pkt->length += 4;
- *(pkt->dat+(pkt->length)++) = (unsigned char) n;
- /* Expiration date */
- bcopy((char *) &x_date, (char *) (pkt->dat+pkt->length),4);
- pkt->length += 4;
-
- /* Now send the ciphertext and info to help decode it */
- *(pkt->dat+(pkt->length)++) = (unsigned char) kvno;
- w_l = (short) cipher->length;
- bcopy((char *) &w_l,(char *) (pkt->dat+pkt->length),2);
- pkt->length += 2;
- bcopy((char *) (cipher->dat), (char *) (pkt->dat+pkt->length),
- cipher->length);
- pkt->length += cipher->length;
-
- /* And return the packet */
- return pkt;
- }
-