Return to ppp_auth_chap_md5.c CVS log

Up to [ELWIX - Embedded LightWeight unIX -] / embedaddon / libpdel / ppp

Annotation of embedaddon/libpdel/ppp/ppp_auth_chap_md5.c, revision 1.1.1.1

1.1       misho       1: 
                      2: /*
                      3:  * Copyright (c) 2001-2002 Packet Design, LLC.
                      4:  * All rights reserved.
                      5:  * 
                      6:  * Subject to the following obligations and disclaimer of warranty,
                      7:  * use and redistribution of this software, in source or object code
                      8:  * forms, with or without modifications are expressly permitted by
                      9:  * Packet Design; provided, however, that:
                     10:  * 
                     11:  *    (i)  Any and all reproductions of the source or object code
                     12:  *         must include the copyright notice above and the following
                     13:  *         disclaimer of warranties; and
                     14:  *    (ii) No rights are granted, in any manner or form, to use
                     15:  *         Packet Design trademarks, including the mark "PACKET DESIGN"
                     16:  *         on advertising, endorsements, or otherwise except as such
                     17:  *         appears in the above copyright notice or in the software.
                     18:  * 
                     19:  * THIS SOFTWARE IS BEING PROVIDED BY PACKET DESIGN "AS IS", AND
                     20:  * TO THE MAXIMUM EXTENT PERMITTED BY LAW, PACKET DESIGN MAKES NO
                     21:  * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING
                     22:  * THIS SOFTWARE, INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED
                     23:  * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE,
                     24:  * OR NON-INFRINGEMENT.  PACKET DESIGN DOES NOT WARRANT, GUARANTEE,
                     25:  * OR MAKE ANY REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS
                     26:  * OF THE USE OF THIS SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY,
                     27:  * RELIABILITY OR OTHERWISE.  IN NO EVENT SHALL PACKET DESIGN BE
                     28:  * LIABLE FOR ANY DAMAGES RESULTING FROM OR ARISING OUT OF ANY USE
                     29:  * OF THIS SOFTWARE, INCLUDING WITHOUT LIMITATION, ANY DIRECT,
                     30:  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, PUNITIVE, OR CONSEQUENTIAL
                     31:  * DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, LOSS OF
                     32:  * USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY THEORY OF
                     33:  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
                     34:  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
                     35:  * THE USE OF THIS SOFTWARE, EVEN IF PACKET DESIGN IS ADVISED OF
                     36:  * THE POSSIBILITY OF SUCH DAMAGE.
                     37:  *
                     38:  * Author: Archie Cobbs <archie@freebsd.org>
                     39:  */
                     40: 
                     41: #include "ppp/ppp_defs.h"
                     42: #include "ppp/ppp_log.h"
                     43: #include "ppp/ppp_util.h"
                     44: #include "ppp/ppp_fsm_option.h"
                     45: #include "ppp/ppp_auth.h"
                     46: #include "ppp/ppp_auth_chap.h"
                     47: 
                     48: #include <openssl/md5.h>
                     49: 
                     50: #define CHAP_MD5_CHALLENGE_LEN 16
                     51: 
                     52: static ppp_auth_chap_set_id_t  ppp_auth_chap_md5_set_id;
                     53: static ppp_auth_chap_hash_t    ppp_auth_chap_md5_hash;
                     54: static ppp_auth_chap_equal_t   ppp_auth_chap_md5_equal;
                     55: static ppp_auth_chap_final_t   ppp_auth_chap_md5_final;
                     56: 
                     57: const struct ppp_auth_chap_type ppp_auth_chap_md5 = {
                     58:        ppp_auth_chap_md5_set_id,
                     59:        ppp_auth_chap_md5_hash,
                     60:        ppp_auth_chap_md5_equal,
                     61:        ppp_auth_chap_md5_final,
                     62:        0,
                     63:        CHAP_MD5_CHALLENGE_LEN,
                     64:        offsetof(struct ppp_auth_cred_chap_md5, hash),
                     65:        MD5_DIGEST_LENGTH
                     66: };
                     67: 
                     68: static void
                     69: ppp_auth_chap_md5_set_id(struct ppp_auth_cred_chap *cred, u_char id)
                     70: {
                     71:        cred->u.md5.id = id;
                     72: }
                     73: 
                     74: static void
                     75: ppp_auth_chap_md5_hash(struct ppp_auth_cred_chap *chap,
                     76:        const void *secret, size_t slen)
                     77: {
                     78:        struct ppp_auth_cred_chap_md5 *const md5 = &chap->u.md5;
                     79:        MD5_CTX ctx;
                     80: 
                     81:        MD5_Init(&ctx);
                     82:        MD5_Update(&ctx, &md5->id, 1);
                     83:        MD5_Update(&ctx, secret, slen);
                     84:        MD5_Update(&ctx, &chap->chal_data, chap->chal_len);
                     85:        MD5_Final(md5->hash, &ctx);
                     86: }
                     87: 
                     88: static int
                     89: ppp_auth_chap_md5_equal(struct ppp_auth_cred_chap *chap1,
                     90:        struct ppp_auth_cred_chap *chap2)
                     91: {
                     92:        struct ppp_auth_cred_chap_md5 *const md5_1 = &chap1->u.md5;
                     93:        struct ppp_auth_cred_chap_md5 *const md5_2 = &chap2->u.md5;
                     94: 
                     95:        return (memcmp(md5_1->hash, md5_2->hash, MD5_DIGEST_LENGTH) == 0);
                     96: }
                     97: 
                     98: static int
                     99: ppp_auth_chap_md5_final(struct ppp_auth_cred_chap *cred, struct ppp_log *log,
                    100:        int valid, const u_char *payload, size_t len, const u_char *authresp)
                    101: {
                    102:        char buf[256];
                    103: 
                    104:        /* Display message */
                    105:        ppp_util_ascify(buf, sizeof(buf), payload, len);
                    106:        ppp_log_put(log, LOG_INFO, "message: %s", buf);
                    107:        return (0);
                    108: }
                    109: