diff options
Diffstat (limited to 'crypto/kerberosIV/lib/krb/rd_safe.c')
| -rw-r--r-- | crypto/kerberosIV/lib/krb/rd_safe.c | 183 |
1 files changed, 0 insertions, 183 deletions
diff --git a/crypto/kerberosIV/lib/krb/rd_safe.c b/crypto/kerberosIV/lib/krb/rd_safe.c deleted file mode 100644 index 1d536ab..0000000 --- a/crypto/kerberosIV/lib/krb/rd_safe.c +++ /dev/null @@ -1,183 +0,0 @@ -/* - * Copyright (c) 1995 - 2000 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: rd_safe.c,v 1.26.2.1 2000/10/10 13:20:36 assar Exp $"); - -/* application include files */ -#include "krb-archaeology.h" - -#ifndef DES_QUAD_GUESS -/* Temporary fixes for krb_{rd,mk}_safe */ -#define DES_QUAD_GUESS 0 -#define DES_QUAD_NEW 1 -#define DES_QUAD_OLD 2 - -#define DES_QUAD_DEFAULT DES_QUAD_GUESS - -#endif /* DES_QUAD_GUESS */ - -/* Generate two checksums in the given byteorder of the data, one - * new-form and one old-form. It has to be done this way to be - * compatible with the old version of des_quad_cksum. - */ - -/* des_quad_chsum-type; 0 == unknown, 1 == new PL10++, 2 == old */ -int dqc_type = DES_QUAD_DEFAULT; - -void -fixup_quad_cksum(void *start, size_t len, des_cblock *key, - void *new_checksum, void *old_checksum, int little) -{ - des_quad_cksum((des_cblock*)start, (des_cblock*)new_checksum, len, 2, key); - if(HOST_BYTE_ORDER){ - if(little){ - memcpy(old_checksum, new_checksum, 16); - }else{ - u_int32_t *tmp = (u_int32_t*)new_checksum; - memcpy(old_checksum, new_checksum, 16); - swap_u_16(old_checksum); - swap_u_long(tmp[0]); - swap_u_long(tmp[1]); - swap_u_long(tmp[2]); - swap_u_long(tmp[3]); - } - }else{ - if(little){ - u_int32_t *tmp = (u_int32_t*)new_checksum; - swap_u_long(tmp[0]); - swap_u_long(tmp[1]); - swap_u_long(tmp[2]); - swap_u_long(tmp[3]); - memcpy(old_checksum, new_checksum, 16); - }else{ - u_int32_t tmp[4]; - tmp[0] = ((u_int32_t*)new_checksum)[3]; - tmp[1] = ((u_int32_t*)new_checksum)[2]; - tmp[2] = ((u_int32_t*)new_checksum)[1]; - tmp[3] = ((u_int32_t*)new_checksum)[0]; - memcpy(old_checksum, tmp, 16); - } - } -} - -/* - * krb_rd_safe() checks the integrity of an AUTH_MSG_SAFE message. - * Given the message received, "in", the length of that message, - * "in_length", the "key" to compute the checksum with, and the - * network addresses of the "sender" and "receiver" of the message, - * krb_rd_safe() returns RD_AP_OK if message is okay, otherwise - * some error code. - * - * The message data retrieved from "in" is returned in the structure - * "m_data". The pointer to the application data (m_data->app_data) - * refers back to the appropriate place in "in". - * - * See the file "mk_safe.c" for the format of the AUTH_MSG_SAFE - * message. The structure containing the extracted message - * information, MSG_DAT, is defined in "krb.h". - */ - -int32_t -krb_rd_safe(void *in, u_int32_t in_length, des_cblock *key, - struct sockaddr_in *sender, struct sockaddr_in *receiver, - MSG_DAT *m_data) -{ - unsigned char *p = (unsigned char*)in, *start; - - unsigned char pvno, type; - int little_endian; - struct timeval tv; - u_int32_t src_addr; - int delta_t; - - - pvno = *p++; - if(pvno != KRB_PROT_VERSION) - return RD_AP_VERSION; - - type = *p++; - little_endian = type & 1; - type &= ~1; - if(type != AUTH_MSG_SAFE) - return RD_AP_MSG_TYPE; - - start = p; - - p += krb_get_int(p, &m_data->app_length, 4, little_endian); - - if(m_data->app_length + 31 > in_length) - return RD_AP_MODIFIED; - - m_data->app_data = p; - - p += m_data->app_length; - - m_data->time_5ms = *p++; - - p += krb_get_address(p, &src_addr); - - if (!krb_equiv(src_addr, sender->sin_addr.s_addr)) - return RD_AP_BADD; - - p += krb_get_int(p, (u_int32_t *)&m_data->time_sec, 4, little_endian); - m_data->time_sec = lsb_time(m_data->time_sec, sender, receiver); - - gettimeofday(&tv, NULL); - - delta_t = abs((int)((long) tv.tv_sec - m_data->time_sec)); - if (delta_t > CLOCK_SKEW) return RD_AP_TIME; - - /* - * caller must check timestamps for proper order and replays, since - * server might have multiple clients each with its own timestamps - * and we don't assume tightly synchronized clocks. - */ - - { - unsigned char new_checksum[16]; - unsigned char old_checksum[16]; - fixup_quad_cksum(start, p - start, key, - new_checksum, old_checksum, little_endian); - if((dqc_type == DES_QUAD_GUESS || dqc_type == DES_QUAD_NEW) && - memcmp(new_checksum, p, 16) == 0) - dqc_type = DES_QUAD_NEW; - else if((dqc_type == DES_QUAD_GUESS || dqc_type == DES_QUAD_OLD) && - memcmp(old_checksum, p, 16) == 0) - dqc_type = DES_QUAD_OLD; - else - return RD_AP_MODIFIED; - } - return KSUCCESS; -} |
