/* * Copyright 1997 Niels Provos * 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 Niels Provos. * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. */ /* * photuris_cookie_response: * create a COOKIE_RESPONSE packet; return -1 on failure, 0 on success * */ #ifndef lint static char rcsid[] = "$Id: photuris_cookie_response.c,v 1.1 1998/11/14 23:37:26 deraadt Exp $"; #endif #include #include #include "config.h" #include "photuris.h" #include "packets.h" #include "state.h" #include "cookie.h" #include "server.h" /* XXX - on value_request receive we need to set the responder schemes */ int photuris_cookie_response(struct stateob *st, u_char *buffer, int *size, u_int8_t *icookie, u_int8_t counter, u_int8_t *address, u_int16_t port, u_int8_t *schemes, u_int16_t ssize) { struct cookie_response *header; struct stateob tempst; if (*size < COOKIE_RESPONSE_MIN + ssize) return -1; /* buffer not large enough */ header = (struct cookie_response *) buffer; /* Copy list of schemes */ bcopy(schemes, COOKIE_RESPONSE_SCHEMES(header), ssize); /* XXX - There are no state information at this phase */ bzero((char *)&tempst, sizeof(tempst)); /* Set up temp. state */ tempst.initiator = 0; /* We are the Responder */ bcopy(icookie, tempst.icookie, COOKIE_SIZE); strncpy(tempst.address, address, 15); tempst.port = global_port; bcopy(tempst.icookie, header->icookie, COOKIE_SIZE); if (st == NULL) tempst.counter = counter + 1; else tempst.counter = st->counter + 1; if (tempst.counter == 0) tempst.counter = 1; cookie_generate(&tempst, header->rcookie, COOKIE_SIZE, schemes, ssize); header->counter = tempst.counter; header->type = COOKIE_RESPONSE; *size = COOKIE_RESPONSE_MIN + ssize; return 0; }