diff options
Diffstat (limited to 'crypto/kerberosIV/lib/krb/decomp_ticket.c')
| -rw-r--r-- | crypto/kerberosIV/lib/krb/decomp_ticket.c | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/crypto/kerberosIV/lib/krb/decomp_ticket.c b/crypto/kerberosIV/lib/krb/decomp_ticket.c new file mode 100644 index 0000000..8e556a3 --- /dev/null +++ b/crypto/kerberosIV/lib/krb/decomp_ticket.c @@ -0,0 +1,119 @@ +/* + * Copyright (c) 1995, 1996, 1997 Kungliga Tekniska Högskolan + * (Royal Institute of Technology, Stockholm, Sweden). + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the Kungliga Tekniska + * Högskolan and its contributors. + * + * 4. Neither the name of the Institute nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include "krb_locl.h" + +RCSID("$Id: decomp_ticket.c,v 1.16 1997/04/01 08:18:22 joda Exp $"); + +/* + * This routine takes a ticket and pointers to the variables that + * should be filled in based on the information in the ticket. It + * fills in values for its arguments. + * + * The routine returns KFAILURE if any of the "pname", "pinstance", + * or "prealm" fields is too big, otherwise it returns KSUCCESS. + * + * The corresponding routine to generate tickets is create_ticket. + * When changes are made to this routine, the corresponding changes + * should also be made to that file. + * + * See create_ticket.c for the format of the ticket packet. + */ + +int +decomp_ticket(KTEXT tkt, /* The ticket to be decoded */ + unsigned char *flags, /* Kerberos ticket flags */ + char *pname, /* Authentication name */ + char *pinstance, /* Principal's instance */ + char *prealm, /* Principal's authentication domain */ + u_int32_t *paddress,/* Net address of entity requesting ticket */ + unsigned char *session, /* Session key inserted in ticket */ + int *life, /* Lifetime of the ticket */ + u_int32_t *time_sec, /* Issue time and date */ + char *sname, /* Service name */ + char *sinstance, /* Service instance */ + des_cblock *key, /* Service's secret key (to decrypt the ticket) */ + des_key_schedule schedule) /* The precomputed key schedule */ + +{ + unsigned char *p = tkt->dat; + + int little_endian; + + des_pcbc_encrypt((des_cblock *)tkt->dat, (des_cblock *)tkt->dat, + tkt->length, schedule, key, DES_DECRYPT); + + tkt->mbz = 0; + + *flags = *p++; + + little_endian = (*flags >> K_FLAG_ORDER) & 1; + + if(strlen((char*)p) > ANAME_SZ) + return KFAILURE; + p += krb_get_string(p, pname); + + if(strlen((char*)p) > INST_SZ) + return KFAILURE; + p += krb_get_string(p, pinstance); + + if(strlen((char*)p) > REALM_SZ) + return KFAILURE; + p += krb_get_string(p, prealm); + + if(tkt->length - (p - tkt->dat) < 8 + 1 + 4) + return KFAILURE; + p += krb_get_address(p, paddress); + + memcpy(session, p, 8); + p += 8; + + *life = *p++; + + p += krb_get_int(p, time_sec, 4, little_endian); + + if(strlen((char*)p) > SNAME_SZ) + return KFAILURE; + p += krb_get_string(p, sname); + + if(strlen((char*)p) > INST_SZ) + return KFAILURE; + p += krb_get_string(p, sinstance); + + return KSUCCESS; +} |
