diff options
Diffstat (limited to 'crypto/kerberosIV/lib/krb/create_ciph.c')
| -rw-r--r-- | crypto/kerberosIV/lib/krb/create_ciph.c | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/crypto/kerberosIV/lib/krb/create_ciph.c b/crypto/kerberosIV/lib/krb/create_ciph.c new file mode 100644 index 000000000000..27d27ff604ea --- /dev/null +++ b/crypto/kerberosIV/lib/krb/create_ciph.c @@ -0,0 +1,117 @@ +/* + * 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: create_ciph.c,v 1.9 1997/04/01 08:18:20 joda Exp $"); + +/* + * This routine is used by the authentication server to create + * a packet for its client, containing a ticket for the requested + * service (given in "tkt"), and some information about the ticket, + * + * Returns KSUCCESS no matter what. + * + * The length of the cipher is stored in c->length; the format of + * c->dat is as follows: + * + * variable + * type or constant data + * ---- ----------- ---- + * + * + * 8 bytes session session key for client, service + * + * string service service name + * + * string instance service instance + * + * string realm KDC realm + * + * unsigned char life ticket lifetime + * + * unsigned char kvno service key version number + * + * unsigned char tkt->length length of following ticket + * + * data tkt->dat ticket for service + * + * 4 bytes kdc_time KDC's timestamp + * + * <=7 bytes null null pad to 8 byte multiple + * + */ + +int +create_ciph(KTEXT c, /* Text block to hold ciphertext */ + unsigned char *session, /* Session key to send to user */ + char *service, /* Service name on ticket */ + char *instance, /* Instance name on ticket */ + char *realm, /* Realm of this KDC */ + u_int32_t life, /* Lifetime of the ticket */ + int kvno, /* Key version number for service */ + KTEXT tkt, /* The ticket for the service */ + u_int32_t kdc_time, /* KDC time */ + des_cblock *key) /* Key to encrypt ciphertext with */ + +{ + unsigned char *p = c->dat; + + memset(c, 0, sizeof(KTEXT_ST)); + + memcpy(p, session, 8); + p += 8; + + p += krb_put_nir(service, instance, realm, p); + + p += krb_put_int(life, p, 1); + p += krb_put_int(kvno, p, 1); + + p += krb_put_int(tkt->length, p, 1); + + memcpy(p, tkt->dat, tkt->length); + p += tkt->length; + + p += krb_put_int(kdc_time, p, 4); + + /* multiple of eight bytes */ + c->length = (p - c->dat + 7) & ~7; + + encrypt_ktext(c, key, DES_ENCRYPT); + return KSUCCESS; +} |