diff options
Diffstat (limited to 'crypto/kerberosIV/lib/krb/krb_check_auth.c')
-rw-r--r-- | crypto/kerberosIV/lib/krb/krb_check_auth.c | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/crypto/kerberosIV/lib/krb/krb_check_auth.c b/crypto/kerberosIV/lib/krb/krb_check_auth.c new file mode 100644 index 0000000..f20b5c2 --- /dev/null +++ b/crypto/kerberosIV/lib/krb/krb_check_auth.c @@ -0,0 +1,71 @@ +/* + * 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. 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: krb_check_auth.c,v 1.5 1999/12/02 16:58:42 joda Exp $"); + +/* + * + * Receive an mutual-authenticator for a server in `packet', with + * `checksum', `session', and `schedule' having the appropriate values + * and return the data in `msg_data'. + * + * Return KSUCCESS if the received checksum is correct. + * + */ + +int +krb_check_auth(KTEXT packet, + u_int32_t checksum, + MSG_DAT *msg_data, + des_cblock *session, + struct des_ks_struct *schedule, + struct sockaddr_in *laddr, + struct sockaddr_in *faddr) +{ + int ret; + u_int32_t checksum2; + + ret = krb_rd_priv (packet->dat, packet->length, schedule, session, faddr, + laddr, msg_data); + if (ret != RD_AP_OK) + return ret; + if (msg_data->app_length != 4) + return KFAILURE; + krb_get_int (msg_data->app_data, &checksum2, 4, 0); + if (checksum2 == checksum + 1) + return KSUCCESS; + else + return KFAILURE; +} |