/*
* radeapclient.c EAP specific radius packet debug tool.
*
* Version: $Id: radeapclient.c,v 1.7.4.6 2007/03/05 14:09:10 aland Exp $
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Copyright 2000 The FreeRADIUS server project
* Copyright 2000 Miquel van Smoorenburg <miquels@cistron.nl>
* Copyright 2000 Alan DeKok <aland@ox.org>
*/
static const char rcsid[] = "$Id: radeapclient.c,v 1.7.4.6 2007/03/05 14:09:10 aland Exp $";
#include "autoconf.h"
#include <stdio.h>
#include <stdlib.h>
#if HAVE_UNISTD_H
# include <unistd.h>
#endif
#include <string.h>
#include <ctype.h>
#include <netdb.h>
#include <sys/socket.h>
#if HAVE_NETINET_IN_H
# include <netinet/in.h>
#endif
#if HAVE_SYS_SELECT_H
# include <sys/select.h>
#endif
#if HAVE_GETOPT_H
# include <getopt.h>
#endif
#include "conf.h"
#include "radpaths.h"
#include "missing.h"
#include "../../include/md5.h"
#include "eap_types.h"
#include "eap_sim.h"
extern int sha1_data_problems;
static int retries = 10;
static float timeout = 3;
static const char *secret = NULL;
static int do_output = 1;
static int do_summary = 0;
static int filedone = 0;
static int totalapp = 0;
static int totaldeny = 0;
static char filesecret[256];
const char *radius_dir = RADDBDIR;
const char *progname = "radeapclient";
/* lrad_randctx randctx; */
radlog_dest_t radlog_dest = RADLOG_STDERR;
const char *radlog_dir = NULL;
int debug_flag = 0;
struct main_config_t mainconfig;
char password[256];
struct eapsim_keys eapsim_mk;
static void NEVER_RETURNS usage(void)
{
fprintf(stderr, "Usage: radeapclient [options] server[:port] <command> [<secret>]\n");
fprintf(stderr, " <command> One of auth, acct, status, or disconnect.\n");
fprintf(stderr, " -c count Send each packet 'count' times.\n");
fprintf(stderr, " -d raddb Set dictionary directory.\n");
fprintf(stderr, " -f file Read packets from file, not stdin.\n");
fprintf(stderr, " -r retries If timeout, retry sending the packet 'retries' times.\n");
fprintf(stderr, " -t timeout Wait 'timeout' seconds before retrying (may be a floating point number).\n");
fprintf(stderr, " -i id Set request id to 'id'. Values may be 0..255\n");
fprintf(stderr, " -S file read secret from file, not command line.\n");
fprintf(stderr, " -q Do not print anything out.\n");
fprintf(stderr, " -s Print out summary information of auth results.\n");
fprintf(stderr, " -v Show program version information.\n");
fprintf(stderr, " -x Debugging mode.\n");
exit(1);
}
int radlog(int lvl, const char *msg, ...)
{
va_list ap;
int r;
r = lvl; /* shut up compiler */
va_start(ap, msg);
r = vfprintf(stderr, msg, ap);
va_end(ap);
fputc('\n', stderr);
return r;
}
int log_debug(const char *msg, ...)
{
va_list ap;
int r;
va_start(ap, msg);
r = vfprintf(stderr, msg, ap);
va_end(ap);
fputc('\n', stderr);
return r;
}
static int getport(const char *name)
{
struct servent *svp;
svp = getservbyname (name, "udp");
if (!svp) {
return 0;
}
return ntohs(svp->s_port);
}
static int send_packet(RADIUS_PACKET *req, RADIUS_PACKET **rep)
{
int i;
struct timeval tv;
for (i = 0; i < retries; i++) {
fd_set rdfdesc;
rad_send(req, NULL, secret);
/* And wait for reply, timing out as necessary */
FD_ZERO(&rdfdesc);
FD_SET(req->sockfd, &rdfdesc);
tv.tv_sec = (int)timeout;
tv.tv_usec = 1000000 * (timeout - (int) timeout);
/* Something's wrong if we don't get exactly one fd. */
if (select(req->sockfd + 1, &rdfdesc, NULL, NULL, &tv) != 1) {
continue;
}
*rep = rad_recv(req->sockfd);
if (*rep != NULL) {
/*
* If we get a response from a machine
* which we did NOT send a request to,
* then complain.
*/
if (((*rep)->src_ipaddr != req->dst_ipaddr) ||
((*rep)->src_port != req->dst_port)) {
char src[64], dst[64];
ip_ntoa(src, (*rep)->src_ipaddr);
ip_ntoa(dst, req->dst_ipaddr);
fprintf(stderr, "radclient: ERROR: Sent request to host %s port %d, got response from host %s port %d\n!",
dst, req->dst_port,
src, (*rep)->src_port);
exit(1);
}
break;
} else { /* NULL: couldn't receive the packet */
librad_perror("radclient:");
exit(1);
}
}
/* No response or no data read (?) */
if (i == retries) {
fprintf(stderr, "radclient: no response from server\n");
exit(1);
}
/*
* FIXME: Discard the packet & listen for another.
*
* Hmm... we should really be using eapol_test, which does
* a lot more than radeapclient.
*/
if (rad_verify(*rep, req, secret) != 0) {
librad_perror("rad_verify");
exit(1);
}
if (rad_decode(*rep, req, secret) != 0) {
librad_perror("rad_decode");
exit(1);
}
/* libradius debug already prints out the value pairs for us */
if (!librad_debug && do_output) {
printf("Received response ID %d, code %d, length = %d\n",
(*rep)->id, (*rep)->code, (*rep)->data_len);
vp_printlist(stdout, (*rep)->vps);
}
if((*rep)->code == PW_AUTHENTICATION_ACK) {
totalapp++;
} else {
totaldeny++;
}
return 0;
}
static void cleanresp(RADIUS_PACKET *resp)
{
VALUE_PAIR *vpnext, *vp, **last;
/*
* maybe should just copy things we care about, or keep
* a copy of the original input and start from there again?
*/
pairdelete(&resp->vps, PW_EAP_MESSAGE);
pairdelete(&resp->vps, ATTRIBUTE_EAP_BASE+PW_EAP_IDENTITY);
last = &resp->vps;
for(vp = *last; vp != NULL; vp = vpnext)
{
vpnext = vp->next;
if((vp->attribute > ATTRIBUTE_EAP_BASE &&
vp->attribute <= ATTRIBUTE_EAP_BASE+256) ||
(vp->attribute > ATTRIBUTE_EAP_SIM_BASE &&
vp->attribute <= ATTRIBUTE_EAP_SIM_BASE+256))
{
*last = vpnext;
pairbasicfree(vp);
} else {
last = &vp->next;
}
}
}
/*
* we got an EAP-Request/Sim/Start message in a legal state.
*
* pick a supported version, put it into the reply, and insert a nonce.
*/
static int process_eap_start(RADIUS_PACKET *req,
RADIUS_PACKET *rep)
{
VALUE_PAIR *vp, *newvp;
VALUE_PAIR *anyidreq_vp, *fullauthidreq_vp, *permanentidreq_vp;
uint16_t *versions, selectedversion;
unsigned int i,versioncount;
/* form new response clear of any EAP stuff */
cleanresp(rep);
if((vp = pairfind(req->vps, ATTRIBUTE_EAP_SIM_BASE+PW_EAP_SIM_VERSION_LIST)) == NULL) {
fprintf(stderr, "illegal start message has no VERSION_LIST\n");
return 0;
}
versions = (uint16_t *)vp->strvalue;
/* verify that the attribute length is big enough for a length field */
if(vp->length < 4)
{
fprintf(stderr, "start message has illegal VERSION_LIST. Too short: %d\n", vp->length);
return 0;
}
versioncount = ntohs(versions[0])/2;
/* verify that the attribute length is big enough for the given number
* of versions present.
*/
if((unsigned)vp->length <= (versioncount*2 + 2))
{
fprintf(stderr, "start message is too short. Claimed %d versions does not fit in %d bytes\n", versioncount, vp->length);
return 0;
}
/*
* record the versionlist for the MK calculation.
*/
eapsim_mk.versionlistlen = versioncount*2;
memcpy(eapsim_mk.versionlist, (unsigned char *)(versions+1),
eapsim_mk.versionlistlen);
/* walk the version list, and pick the one we support, which
* at present, is 1, EAP_SIM_VERSION.
*/
selectedversion=0;
for(i=0; i < versioncount; i++)
{
if(ntohs(versions[i+1]) == EAP_SIM_VERSION)
{
selectedversion=EAP_SIM_VERSION;
break;
}
}
if(selectedversion == 0)
{
fprintf(stderr, "eap-sim start message. No compatible version found. We need %d\n", EAP_SIM_VERSION);
for(i=0; i < versioncount; i++)
{
fprintf(stderr, "\tfound version %d\n",
ntohs(versions[i+1]));
}
}
/*
* now make sure that we have only FULLAUTH_ID_REQ.
* I think that it actually might not matter - we can answer in
* anyway we like, but it is illegal to have more than one
* present.
*/
anyidreq_vp = pairfind(req->vps, ATTRIBUTE_EAP_SIM_BASE+PW_EAP_SIM_ANY_ID_REQ);
fullauthidreq_vp = pairfind(req->vps, ATTRIBUTE_EAP_SIM_BASE+PW_EAP_SIM_FULLAUTH_ID_REQ);
permanentidreq_vp = pairfind(req->vps, ATTRIBUTE_EAP_SIM_BASE+PW_EAP_SIM_PERMANENT_ID_REQ);
if(fullauthidreq_vp == NULL ||
anyidreq_vp != NULL ||
permanentidreq_vp != NULL) {
fprintf(stderr, "start message has %sanyidreq, %sfullauthid and %spermanentid. Illegal combination.\n",
(anyidreq_vp != NULL ? "a " : "no "),
(fullauthidreq_vp != NULL ? "a " : "no "),
(permanentidreq_vp != NULL ? "a " : "no "));
return 0;
}
/* okay, we have just any_id_req there, so fill in response */
/* mark the subtype as being EAP-SIM/Response/Start */
newvp = paircreate(ATTRIBUTE_EAP_SIM_SUBTYPE, PW_TYPE_INTEGER);
newvp->lvalue = eapsim_start;
pairreplace(&(rep->vps), newvp);
/* insert selected version into response. */
newvp = paircreate(ATTRIBUTE_EAP_SIM_BASE+PW_EAP_SIM_SELECTED_VERSION,
PW_TYPE_OCTETS);
versions = (uint16_t *)newvp->strvalue;
versions[0] = htons(selectedversion);
newvp->length = 2;
pairreplace(&(rep->vps), newvp);
/* record the selected version */
memcpy(eapsim_mk.versionselect, (unsigned char *)versions, 2);
vp = newvp = NULL;
{
uint32_t nonce[4];
/*
* insert a nonce_mt that we make up.
*/
newvp = paircreate(ATTRIBUTE_EAP_SIM_BASE+PW_EAP_SIM_NONCE_MT,
PW_TYPE_OCTETS);
newvp->strvalue[0]=0;
newvp->strvalue[1]=0;
newvp->length = 18; /* 16 bytes of nonce + padding */
nonce[0]=lrad_rand();
nonce[1]=lrad_rand();
nonce[2]=lrad_rand();
nonce[3]=lrad_rand();
memcpy(&newvp->strvalue[2], nonce, 16);
pairreplace(&(rep->vps), newvp);
/* also keep a copy of the nonce! */
memcpy(eapsim_mk.nonce_mt, nonce, 16);
}
{
uint16_t *pidlen, idlen;
/*
* insert the identity here.
*/
vp = pairfind(rep->vps, PW_USER_NAME);
if(vp == NULL)
{
fprintf(stderr, "eap-sim: We need to have a User-Name attribute!\n");
return 0;
}
newvp = paircreate(ATTRIBUTE_EAP_SIM_BASE+PW_EAP_SIM_IDENTITY,
PW_TYPE_OCTETS);
idlen = strlen(vp->strvalue);
pidlen = (uint16_t *)newvp->strvalue;
*pidlen = htons(idlen);
newvp->length = idlen + 2;
memcpy(&newvp->strvalue[2], vp->strvalue, idlen);
pairreplace(&(rep->vps), newvp);
/* record it */
memcpy(eapsim_mk.identity, vp->strvalue, idlen);
eapsim_mk.identitylen = idlen;
}
return 1;
}
/*
* we got an EAP-Request/Sim/Challenge message in a legal state.
*
* use the RAND challenge to produce the SRES result, and then
* use that to generate a new MAC.
*
* for the moment, we ignore the RANDs, then just plug in the SRES
* values.
*
*/
static int process_eap_challenge(RADIUS_PACKET *req,
RADIUS_PACKET *rep)
{
VALUE_PAIR *newvp;
VALUE_PAIR *mac, *randvp;
VALUE_PAIR *sres1,*sres2,*sres3;
VALUE_PAIR *Kc1, *Kc2, *Kc3;
uint8_t calcmac[20];
/* look for the AT_MAC and the challenge data */
mac = pairfind(req->vps, ATTRIBUTE_EAP_SIM_BASE+PW_EAP_SIM_MAC);
randvp= pairfind(req->vps, ATTRIBUTE_EAP_SIM_BASE+PW_EAP_SIM_RAND);
if(mac == NULL || randvp == NULL) {
fprintf(stderr, "radeapclient: challenge message needs to contain RAND and MAC\n");
return 0;
}
/*
* compare RAND with randX, to verify this is the right response
* to this challenge.
*/
{
VALUE_PAIR *randcfgvp[3];
unsigned char *randcfg[3];
randcfg[0] = &randvp->strvalue[2];
randcfg[1] = &randvp->strvalue[2+EAPSIM_RAND_SIZE];
randcfg[2] = &randvp->strvalue[2+EAPSIM_RAND_SIZE*2];
randcfgvp[0] = pairfind(rep->vps, ATTRIBUTE_EAP_SIM_RAND1);
randcfgvp[1] = pairfind(rep->vps, ATTRIBUTE_EAP_SIM_RAND2);
randcfgvp[2] = pairfind(rep->vps, ATTRIBUTE_EAP_SIM_RAND3);
if(randcfgvp[0] == NULL ||
randcfgvp[1] == NULL ||
randcfgvp[2] == NULL) {
fprintf(stderr, "radeapclient: needs to have rand1, 2 and 3 set.\n");
return 0;
}
if(memcmp(randcfg[0], randcfgvp[0]->strvalue, EAPSIM_RAND_SIZE)!=0 ||
memcmp(randcfg[1], randcfgvp[1]->strvalue, EAPSIM_RAND_SIZE)!=0 ||
memcmp(randcfg[2], randcfgvp[2]->strvalue, EAPSIM_RAND_SIZE)!=0) {
int rnum,i,j;
fprintf(stderr, "radeapclient: one of rand 1,2,3 didn't match\n");
for(rnum = 0; rnum < 3; rnum++) {
fprintf(stderr, "received rand %d: ", rnum);
j=0;
for (i = 0; i < EAPSIM_RAND_SIZE; i++) {
if(j==4) {
printf("_");
j=0;
}
j++;
fprintf(stderr, "%02x", randcfg[rnum][i]);
}
fprintf(stderr, "\nconfigured rand %d: ", rnum);
j=0;
for (i = 0; i < EAPSIM_RAND_SIZE; i++) {
if(j==4) {
printf("_");
j=0;
}
j++;
fprintf(stderr, "%02x", randcfgvp[rnum]->strvalue[i]);
}
fprintf(stderr, "\n");
}
return 0;
}
}
/*
* now dig up the sres values from the response packet,
* which were put there when we read things in.
*
* Really, they should be calculated from the RAND!
*
*/
sres1 = pairfind(rep->vps, ATTRIBUTE_EAP_SIM_SRES1);
sres2 = pairfind(rep->vps, ATTRIBUTE_EAP_SIM_SRES2);
sres3 = pairfind(rep->vps, ATTRIBUTE_EAP_SIM_SRES3);
if(sres1 == NULL ||
sres2 == NULL ||
sres3 == NULL) {
fprintf(stderr, "radeapclient: needs to have sres1, 2 and 3 set.\n");
return 0;
}
memcpy(eapsim_mk.sres[0], sres1->strvalue, sizeof(eapsim_mk.sres[0]));
memcpy(eapsim_mk.sres[1], sres2->strvalue, sizeof(eapsim_mk.sres[1]));
memcpy(eapsim_mk.sres[2], sres3->strvalue, sizeof(eapsim_mk.sres[2]));
Kc1 = pairfind(rep->vps, ATTRIBUTE_EAP_SIM_KC1);
Kc2 = pairfind(rep->vps, ATTRIBUTE_EAP_SIM_KC2);
Kc3 = pairfind(rep->vps, ATTRIBUTE_EAP_SIM_KC3);
if(Kc1 == NULL ||
Kc2 == NULL ||
Kc3 == NULL) {
fprintf(stderr, "radeapclient: needs to have Kc1, 2 and 3 set.\n");
return 0;
}
memcpy(eapsim_mk.Kc[0], Kc1->strvalue, sizeof(eapsim_mk.Kc[0]));
memcpy(eapsim_mk.Kc[1], Kc2->strvalue, sizeof(eapsim_mk.Kc[1]));
memcpy(eapsim_mk.Kc[2], Kc3->strvalue, sizeof(eapsim_mk.Kc[2]));
/* all set, calculate keys */
eapsim_calculate_keys(&eapsim_mk);
if(debug_flag) {
eapsim_dump_mk(&eapsim_mk);
}
/* verify the MAC, now that we have all the keys. */
if(eapsim_checkmac(req->vps, eapsim_mk.K_aut,
eapsim_mk.nonce_mt, sizeof(eapsim_mk.nonce_mt),
calcmac)) {
printf("MAC check succeed\n");
} else {
int i, j;
j=0;
printf("calculated MAC (");
for (i = 0; i < 20; i++) {
if(j==4) {
printf("_");
j=0;
}
j++;
printf("%02x", calcmac[i]);
}
printf(" did not match\n");
return 0;
}
/* form new response clear of any EAP stuff */
cleanresp(rep);
/* mark the subtype as being EAP-SIM/Response/Start */
newvp = paircreate(ATTRIBUTE_EAP_SIM_SUBTYPE, PW_TYPE_INTEGER);
newvp->lvalue = eapsim_challenge;
pairreplace(&(rep->vps), newvp);
/*
* fill the SIM_MAC with a field that will in fact get appended
* to the packet before the MAC is calculated
*/
newvp = paircreate(ATTRIBUTE_EAP_SIM_BASE+PW_EAP_SIM_MAC,
PW_TYPE_OCTETS);
memcpy(newvp->strvalue+EAPSIM_SRES_SIZE*0, sres1->strvalue, EAPSIM_SRES_SIZE);
memcpy(newvp->strvalue+EAPSIM_SRES_SIZE*1, sres2->strvalue, EAPSIM_SRES_SIZE);
memcpy(newvp->strvalue+EAPSIM_SRES_SIZE*2, sres3->strvalue, EAPSIM_SRES_SIZE);
newvp->length = EAPSIM_SRES_SIZE*3;
pairreplace(&(rep->vps), newvp);
newvp = paircreate(ATTRIBUTE_EAP_SIM_KEY, PW_TYPE_OCTETS);
memcpy(newvp->strvalue, eapsim_mk.K_aut, EAPSIM_AUTH_SIZE);
newvp->length = EAPSIM_AUTH_SIZE;
pairreplace(&(rep->vps), newvp);
return 1;
}
/*
* this code runs the EAP-SIM client state machine.
* the *request* is from the server.
* the *reponse* is to the server.
*
*/
static int respond_eap_sim(RADIUS_PACKET *req,
RADIUS_PACKET *resp)
{
enum eapsim_clientstates state, newstate;
enum eapsim_subtype subtype;
VALUE_PAIR *vp, *statevp, *radstate, *eapid;
char statenamebuf[32], subtypenamebuf[32];
if ((radstate = paircopy2(req->vps, PW_STATE)) == NULL)
{
return 0;
}
if ((eapid = paircopy2(req->vps, ATTRIBUTE_EAP_ID)) == NULL)
{
return 0;
}
/* first, dig up the state from the request packet, setting
* outselves to be in EAP-SIM-Start state if there is none.
*/
if((statevp = pairfind(resp->vps, ATTRIBUTE_EAP_SIM_STATE)) == NULL)
{
/* must be initial request */
statevp = paircreate(ATTRIBUTE_EAP_SIM_STATE, PW_TYPE_INTEGER);
statevp->lvalue = eapsim_client_init;
pairreplace(&(resp->vps), statevp);
}
state = statevp->lvalue;
/*
* map the attributes, and authenticate them.
*/
unmap_eapsim_types(req);
printf("<+++ EAP-sim decoded packet:\n");
vp_printlist(stdout, req->vps);
if((vp = pairfind(req->vps, ATTRIBUTE_EAP_SIM_SUBTYPE)) == NULL)
{
return 0;
}
subtype = vp->lvalue;
/*
* look for the appropriate state, and process incoming message
*/
switch(state) {
case eapsim_client_init:
switch(subtype) {
case eapsim_start:
newstate = process_eap_start(req, resp);
break;
case eapsim_challenge:
case eapsim_notification:
case eapsim_reauth:
default:
fprintf(stderr, "radeapclient: sim in state %s message %s is illegal. Reply dropped.\n",
sim_state2name(state, statenamebuf, sizeof(statenamebuf)),
sim_subtype2name(subtype, subtypenamebuf, sizeof(subtypenamebuf)));
/* invalid state, drop message */
return 0;
}
break;
case eapsim_client_start:
switch(subtype) {
case eapsim_start:
/* NOT SURE ABOUT THIS ONE, retransmit, I guess */
newstate = process_eap_start(req, resp);
break;
case eapsim_challenge:
newstate = process_eap_challenge(req, resp);
break;
default:
fprintf(stderr, "radeapclient: sim in state %s message %s is illegal. Reply dropped.\n",
sim_state2name(state, statenamebuf, sizeof(statenamebuf)),
sim_subtype2name(subtype, subtypenamebuf, sizeof(subtypenamebuf)));
/* invalid state, drop message */
return 0;
}
break;
default:
fprintf(stderr, "radeapclient: sim in illegal state %s\n",
sim_state2name(state, statenamebuf, sizeof(statenamebuf)));
return 0;
}
/* copy the eap state object in */
pairreplace(&(resp->vps), eapid);
/* update stete info, and send new packet */
map_eapsim_types(resp);
/* copy the radius state object in */
pairreplace(&(resp->vps), radstate);
statevp->lvalue = newstate;
return 1;
}
static int respond_eap_md5(RADIUS_PACKET *req,
RADIUS_PACKET *rep)
{
VALUE_PAIR *vp, *id, *state;
int valuesize, namesize;
unsigned char identifier;
unsigned char *value;
unsigned char *name;
MD5_CTX context;
char response[16];
cleanresp(rep);
if ((state = paircopy2(req->vps, PW_STATE)) == NULL)
{
fprintf(stderr, "radeapclient: no state attribute found\n");
return 0;
}
if ((id = paircopy2(req->vps, ATTRIBUTE_EAP_ID)) == NULL)
{
fprintf(stderr, "radeapclient: no EAP-ID attribute found\n");
return 0;
}
identifier = id->lvalue;
if ((vp = pairfind(req->vps, ATTRIBUTE_EAP_BASE+PW_EAP_MD5)) == NULL)
{
fprintf(stderr, "radeapclient: no EAP-MD5 attribute found\n");
return 0;
}
/* got the details of the MD5 challenge */
valuesize = vp->strvalue[0];
value = &vp->strvalue[1];
name = &vp->strvalue[valuesize+1];
namesize = vp->length - (valuesize + 1);
/* sanitize items */
if(valuesize > vp->length)
{
fprintf(stderr, "radeapclient: md5 valuesize if too big (%d > %d)\n",
valuesize, vp->length);
return 0;
}
/* now do the CHAP operation ourself, rather than build the
* buffer. We could also call rad_chap_encode, but it wants
* a CHAP-Challenge, which we don't want to bother with.
*/
librad_MD5Init(&context);
librad_MD5Update(&context, &identifier, 1);
librad_MD5Update(&context, password, strlen(password));
librad_MD5Update(&context, value, valuesize);
librad_MD5Final(response, &context);
vp = paircreate(ATTRIBUTE_EAP_BASE+PW_EAP_MD5, PW_TYPE_OCTETS);
vp->strvalue[0]=16;
memcpy(&vp->strvalue[1], response, 16);
vp->length = 17;
pairreplace(&(rep->vps), vp);
pairreplace(&(rep->vps), id);
/* copy the state object in */
pairreplace(&(rep->vps), state);
return 1;
}
static int sendrecv_eap(RADIUS_PACKET *rep)
{
RADIUS_PACKET *req = NULL;
VALUE_PAIR *vp, *vpnext;
int tried_eap_md5 = 0;
/*
* Keep a copy of the the User-Password attribute.
*/
if ((vp = pairfind(rep->vps, ATTRIBUTE_EAP_MD5_PASSWORD)) != NULL) {
strNcpy(password, (char *)vp->strvalue, sizeof(vp->strvalue));
} else if ((vp = pairfind(rep->vps, PW_PASSWORD)) != NULL) {
strNcpy(password, (char *)vp->strvalue, sizeof(vp->strvalue));
/*
* Otherwise keep a copy of the CHAP-Password attribute.
*/
} else if ((vp = pairfind(rep->vps, PW_CHAP_PASSWORD)) != NULL) {
strNcpy(password, (char *)vp->strvalue, sizeof(vp->strvalue));
} else {
*password = '\0';
}
again:
rep->id++;
printf("\n+++> About to send encoded packet:\n");
vp_printlist(stdout, rep->vps);
/*
* if there are EAP types, encode them into an EAP-Message
*
*/
map_eap_types(rep);
/*
* Fix up Digest-Attributes issues
*/
for (vp = rep->vps; vp != NULL; vp = vp->next) {
switch (vp->attribute) {
default:
break;
case PW_DIGEST_REALM:
case PW_DIGEST_NONCE:
case PW_DIGEST_METHOD:
case PW_DIGEST_URI:
case PW_DIGEST_QOP:
case PW_DIGEST_ALGORITHM:
case PW_DIGEST_BODY_DIGEST:
case PW_DIGEST_CNONCE:
case PW_DIGEST_NONCE_COUNT:
case PW_DIGEST_USER_NAME:
/* overlapping! */
memmove(&vp->strvalue[2], &vp->strvalue[0], vp->length);
vp->strvalue[0] = vp->attribute - PW_DIGEST_REALM + 1;
vp->length += 2;
vp->strvalue[1] = vp->length;
vp->attribute = PW_DIGEST_ATTRIBUTES;
break;
}
}
/*
* If we've already sent a packet, free up the old
* one, and ensure that the next packet has a unique
* ID and authentication vector.
*/
if (rep->data) {
free(rep->data);
rep->data = NULL;
}
librad_md5_calc(rep->vector, rep->vector,
sizeof(rep->vector));
if (*password != '\0') {
if ((vp = pairfind(rep->vps, PW_PASSWORD)) != NULL) {
strNcpy((char *)vp->strvalue, password, strlen(password) + 1);
vp->length = strlen(password);
} else if ((vp = pairfind(rep->vps, PW_CHAP_PASSWORD)) != NULL) {
strNcpy((char *)vp->strvalue, password, strlen(password) + 1);
vp->length = strlen(password);
rad_chap_encode(rep, (char *) vp->strvalue, rep->id, vp);
vp->length = 17;
}
} /* there WAS a password */
/* send the response, wait for the next request */
send_packet(rep, &req);
/* okay got back the packet, go and decode the EAP-Message. */
unmap_eap_types(req);
printf("<+++ EAP decoded packet:\n");
vp_printlist(stdout, req->vps);
/* now look for the code type. */
for (vp = req->vps; vp != NULL; vp = vpnext) {
vpnext = vp->next;
switch (vp->attribute) {
default:
break;
case ATTRIBUTE_EAP_BASE+PW_EAP_MD5:
if(respond_eap_md5(req, rep) && tried_eap_md5 < 3)
{
tried_eap_md5++;
goto again;
}
break;
case ATTRIBUTE_EAP_BASE+PW_EAP_SIM:
if(respond_eap_sim(req, rep))
{
goto again;
}
break;
}
}
return 1;
}
int main(int argc, char **argv)
{
RADIUS_PACKET *req;
char *p;
int c;
int port = 0;
char *filename = NULL;
FILE *fp;
int count = 1;
int id;
id = ((int)getpid() & 0xff);
librad_debug = 0;
radlog_dest = RADLOG_STDERR;
while ((c = getopt(argc, argv, "c:d:f:hi:qst:r:S:xXv")) != EOF)
{
switch(c) {
case 'c':
if (!isdigit((int) *optarg))
usage();
count = atoi(optarg);
break;
case 'd':
radius_dir = optarg;
break;
case 'f':
filename = optarg;
break;
case 'q':
do_output = 0;
break;
case 'x':
debug_flag++;
librad_debug++;
break;
case 'X':
#if 0
sha1_data_problems = 1; /* for debugging only */
#endif
break;
case 'r':
if (!isdigit((int) *optarg))
usage();
retries = atoi(optarg);
break;
case 'i':
if (!isdigit((int) *optarg))
usage();
id = atoi(optarg);
if ((id < 0) || (id > 255)) {
usage();
}
break;
case 's':
do_summary = 1;
break;
case 't':
if (!isdigit((int) *optarg))
usage();
timeout = atof(optarg);
break;
case 'v':
printf("radclient: $Id: radeapclient.c,v 1.7.4.6 2007/03/05 14:09:10 aland Exp $ built on " __DATE__ " at " __TIME__ "\n");
exit(0);
break;
case 'S':
fp = fopen(optarg, "r");
if (!fp) {
fprintf(stderr, "radclient: Error opening %s: %s\n",
optarg, strerror(errno));
exit(1);
}
if (fgets(filesecret, sizeof(filesecret), fp) == NULL) {
fprintf(stderr, "radclient: Error reading %s: %s\n",
optarg, strerror(errno));
exit(1);
}
fclose(fp);
/* truncate newline */
p = filesecret + strlen(filesecret) - 1;
while ((p >= filesecret) &&
(*p < ' ')) {
*p = '\0';
--p;
}
if (strlen(filesecret) < 2) {
fprintf(stderr, "radclient: Secret in %s is too short\n", optarg);
exit(1);
}
secret = filesecret;
break;
case 'h':
default:
usage();
break;
}
}
argc -= (optind - 1);
argv += (optind - 1);
if ((argc < 3) ||
((secret == NULL) && (argc < 4))) {
usage();
}
if (dict_init(radius_dir, RADIUS_DICTIONARY) < 0) {
librad_perror("radclient");
return 1;
}
if ((req = rad_alloc(1)) == NULL) {
librad_perror("radclient");
exit(1);
}
#if 0
{
FILE *randinit;
if((randinit = fopen("/dev/urandom", "r")) == NULL)
{
perror("/dev/urandom");
} else {
fread(randctx.randrsl, 256, 1, randinit);
fclose(randinit);
}
}
lrad_randinit(&randctx, 1);
#endif
req->id = id;
/*
* Strip port from hostname if needed.
*/
if ((p = strchr(argv[1], ':')) != NULL) {
*p++ = 0;
port = atoi(p);
}
/*
* See what kind of request we want to send.
*/
if (strcmp(argv[2], "auth") == 0) {
if (port == 0) port = getport("radius");
if (port == 0) port = PW_AUTH_UDP_PORT;
req->code = PW_AUTHENTICATION_REQUEST;
} else if (strcmp(argv[2], "acct") == 0) {
if (port == 0) port = getport("radacct");
if (port == 0) port = PW_ACCT_UDP_PORT;
req->code = PW_ACCOUNTING_REQUEST;
do_summary = 0;
} else if (strcmp(argv[2], "status") == 0) {
if (port == 0) port = getport("radius");
if (port == 0) port = PW_AUTH_UDP_PORT;
req->code = PW_STATUS_SERVER;
} else if (strcmp(argv[2], "disconnect") == 0) {
if (port == 0) port = PW_POD_UDP_PORT;
req->code = PW_DISCONNECT_REQUEST;
} else if (isdigit((int) argv[2][0])) {
if (port == 0) port = getport("radius");
if (port == 0) port = PW_AUTH_UDP_PORT;
req->code = atoi(argv[2]);
} else {
usage();
}
/*
* Ensure that the configuration is initialized.
*/
memset(&mainconfig, 0, sizeof(mainconfig));
/*
* Resolve hostname.
*/
req->dst_port = port;
req->dst_ipaddr = ip_getaddr(argv[1]);
if (req->dst_ipaddr == INADDR_NONE) {
fprintf(stderr, "radclient: Failed to find IP address for host %s\n", argv[1]);
exit(1);
}
/*
* Add the secret.
*/
if (argv[3]) secret = argv[3];
/*
* Read valuepairs.
* Maybe read them, from stdin, if there's no
* filename, or if the filename is '-'.
*/
if (filename && (strcmp(filename, "-") != 0)) {
fp = fopen(filename, "r");
if (!fp) {
fprintf(stderr, "radclient: Error opening %s: %s\n",
filename, strerror(errno));
exit(1);
}
} else {
fp = stdin;
}
/*
* Send request.
*/
if ((req->sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
perror("radclient: socket: ");
exit(1);
}
while(!filedone) {
if(req->vps) pairfree(&req->vps);
if ((req->vps = readvp2(fp, &filedone, "radeapclient:"))
== NULL) {
break;
}
sendrecv_eap(req);
}
if(do_summary) {
printf("\n\t Total approved auths: %d\n", totalapp);
printf("\t Total denied auths: %d\n", totaldeny);
}
return 0;
}
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