#include <freeradius-devel/ident.h>
RCSID("$Id$")
#include <freeradius-devel/radiusd.h>
#include <freeradius-devel/modules.h>
#include <freeradius-devel/rad_assert.h>
#include <ctype.h>
char *auth_name(char *buf, size_t buflen, REQUEST *request, int do_cli)
{
VALUE_PAIR *cli;
VALUE_PAIR *pair;
int port = 0;
const char *tls = "";
if ((cli = pairfind(request->packet->vps, PW_CALLING_STATION_ID)) == NULL)
do_cli = 0;
if ((pair = pairfind(request->packet->vps, PW_NAS_PORT)) != NULL)
port = pair->vp_integer;
if (request->packet->dst_port == 0) {
if (pairfind(request->packet->vps, PW_FREERADIUS_PROXIED_TO)) {
tls = " via TLS tunnel";
} else {
tls = " via proxy to virtual server";
}
}
snprintf(buf, buflen, "from client %.128s port %u%s%.128s%s",
request->client->shortname, port,
(do_cli ? " cli " : ""), (do_cli ? (char *)cli->vp_strvalue : ""),
tls);
return buf;
}
static int rad_authlog(const char *msg, REQUEST *request, int goodpass)
{
int logit;
const char *extra_msg = NULL;
char clean_password[1024];
char clean_username[1024];
char buf[1024];
char extra[1024];
VALUE_PAIR *username = NULL;
if (!request->root->log_auth) {
return 0;
}
if (log_stripped_names == 0) {
username = pairfind(request->packet->vps, PW_USER_NAME);
} else {
username = request->username;
}
if (username == NULL) {
strcpy(clean_username, "<no User-Name attribute>");
} else {
fr_print_string((char *)username->vp_strvalue,
username->length,
clean_username, sizeof(clean_username));
}
if (request->root->log_auth_badpass || request->root->log_auth_goodpass) {
if (!request->password) {
VALUE_PAIR *auth_type;
auth_type = pairfind(request->config_items,
PW_AUTH_TYPE);
if (auth_type && (auth_type->vp_strvalue[0] != '\0')) {
snprintf(clean_password, sizeof(clean_password),
"<via Auth-Type = %s>",
auth_type->vp_strvalue);
} else {
strcpy(clean_password, "<no User-Password attribute>");
}
} else if (pairfind(request->packet->vps, PW_CHAP_PASSWORD)) {
strcpy(clean_password, "<CHAP-Password>");
} else {
fr_print_string((char *)request->password->vp_strvalue,
request->password->length,
clean_password, sizeof(clean_password));
}
}
if (goodpass) {
logit = request->root->log_auth_goodpass;
extra_msg = request->root->auth_goodpass_msg;
} else {
logit = request->root->log_auth_badpass;
extra_msg = request->root->auth_badpass_msg;
}
if (extra_msg) {
extra[0] = ' ';
radius_xlat(extra + 1, sizeof(extra) - 1, extra_msg, request,
NULL);
} else {
*extra = '\0';
}
radlog_request(L_AUTH, 0, request, "%s: [%s%s%s] (%s)%s",
msg,
clean_username,
logit ? "/" : "",
logit ? clean_password : "",
auth_name(buf, sizeof(buf), request, 1),
extra);
return 0;
}
static int rad_check_password(REQUEST *request)
{
VALUE_PAIR *auth_type_pair;
VALUE_PAIR *cur_config_item;
VALUE_PAIR *password_pair;
VALUE_PAIR *auth_item;
uint8_t my_chap[MAX_STRING_LEN];
int auth_type = -1;
int result;
int auth_type_count = 0;
result = 0;
cur_config_item = request->config_items;
while(((auth_type_pair = pairfind(cur_config_item, PW_AUTH_TYPE))) != NULL) {
DICT_VALUE *dv;
auth_type = auth_type_pair->vp_integer;
auth_type_count++;
dv = dict_valbyattr(auth_type_pair->attribute,
auth_type_pair->vp_integer);
RDEBUG2("Found Auth-Type = %s",
(dv != NULL) ? dv->name : "?");
cur_config_item = auth_type_pair->next;
if (auth_type == PW_AUTHTYPE_REJECT) {
RDEBUG2("Auth-Type = Reject, rejecting user");
return -2;
}
}
if (( auth_type_count > 1) && (debug_flag)) {
radlog_request(L_ERR, 0, request, "Warning: Found %d auth-types on request for user '%s'",
auth_type_count, request->username->vp_strvalue);
}
if ((auth_type == PW_AUTHTYPE_ACCEPT)
#ifdef WITH_PROXY
|| (request->proxy)
#endif
) {
RDEBUG2("Auth-Type = Accept, accepting the user");
return 0;
}
password_pair = pairfind(request->config_items, PW_USER_PASSWORD);
if (password_pair &&
pairfind(request->config_items, PW_CLEARTEXT_PASSWORD)) {
pairdelete(&request->config_items, PW_USER_PASSWORD);
password_pair = NULL;
}
if (password_pair) {
DICT_ATTR *da;
RDEBUG("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
RDEBUG("!!! Replacing User-Password in config items with Cleartext-Password. !!!");
RDEBUG("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
RDEBUG("!!! Please update your configuration so that the \"known good\" !!!");
RDEBUG("!!! clear text password is in Cleartext-Password, and not in User-Password. !!!");
RDEBUG("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
password_pair->attribute = PW_CLEARTEXT_PASSWORD;
da = dict_attrbyvalue(PW_CLEARTEXT_PASSWORD);
if (!da) {
radlog_request(L_ERR, 0, request, "FATAL: You broke the dictionaries. Please use the default dictionaries!");
_exit(1);
}
password_pair->name = da->name;
}
if ((password_pair = pairfind(request->config_items, PW_CRYPT_PASSWORD)) != NULL) {
if (auth_type == -1) auth_type = PW_AUTHTYPE_CRYPT;
} else {
password_pair = pairfind(request->config_items, PW_CLEARTEXT_PASSWORD);
}
if (auth_type < 0) {
if (password_pair) {
auth_type = PW_AUTHTYPE_LOCAL;
} else {
RDEBUG2("ERROR: No authenticate method (Auth-Type) found for the request: Rejecting the user");
return -2;
}
}
switch(auth_type) {
case PW_AUTHTYPE_CRYPT:
RDEBUG2("WARNING: Please update your configuration, and remove 'Auth-Type = Crypt'");
RDEBUG2("WARNING: Use the PAP module instead.");
auth_item = request->password;
if (auth_item == NULL) {
RDEBUG2("No User-Password or CHAP-Password attribute in the request");
return -1;
}
if (password_pair == NULL) {
RDEBUG2("No Crypt-Password configured for the user");
rad_authlog("Login incorrect "
"(No Crypt-Password configured for the user)", request, 0);
return -1;
}
switch (fr_crypt_check((char *)auth_item->vp_strvalue,
(char *)password_pair->vp_strvalue)) {
case -1:
rad_authlog("Login incorrect "
"(system failed to supply an encrypted password for comparison)", request, 0);
case 1:
return -1;
}
break;
case PW_AUTHTYPE_LOCAL:
RDEBUG2("WARNING: Please update your configuration, and remove 'Auth-Type = Local'");
RDEBUG2("WARNING: Use the PAP or CHAP modules instead.");
auth_item = request->password;
if (!auth_item)
auth_item = pairfind(request->packet->vps,
PW_CHAP_PASSWORD);
if (!auth_item) {
RDEBUG2("No User-Password or CHAP-Password attribute in the request.");
RDEBUG2("Cannot perform authentication.");
return -1;
}
if (password_pair == NULL) {
RDEBUG2("No \"known good\" password was configured for the user.");
RDEBUG2("As a result, we cannot authenticate the user.");
rad_authlog("Login incorrect "
"(No password configured for the user)", request, 0);
return -1;
}
if (auth_item->attribute == PW_USER_PASSWORD) {
if (strcmp((char *)password_pair->vp_strvalue,
(char *)auth_item->vp_strvalue) != 0) {
RDEBUG2("User-Password in the request does NOT match \"known good\" password.");
return -1;
}
RDEBUG2("User-Password in the request is correct.");
break;
} else if (auth_item->attribute != PW_CHAP_PASSWORD) {
RDEBUG2("The user did not supply a User-Password or a CHAP-Password attribute");
rad_authlog("Login incorrect "
"(no User-Password or CHAP-Password attribute)", request, 0);
return -1;
}
rad_chap_encode(request->packet, my_chap,
auth_item->vp_octets[0], password_pair);
if (memcmp(my_chap + 1, auth_item->vp_strvalue + 1,
CHAP_VALUE_LENGTH) != 0) {
RDEBUG2("CHAP-Password is incorrect.");
return -1;
}
RDEBUG2("CHAP-Password is correct.");
break;
default:
result = module_authenticate(auth_type, request);
switch (result) {
case RLM_MODULE_FAIL:
case RLM_MODULE_INVALID:
case RLM_MODULE_NOOP:
case RLM_MODULE_NOTFOUND:
case RLM_MODULE_REJECT:
case RLM_MODULE_UPDATED:
case RLM_MODULE_USERLOCK:
default:
result = -1;
break;
case RLM_MODULE_OK:
result = 0;
break;
case RLM_MODULE_HANDLED:
result = 1;
break;
}
break;
}
return result;
}
int rad_postauth(REQUEST *request)
{
int result;
int postauth_type = 0;
VALUE_PAIR *vp;
vp = pairfind(request->config_items, PW_POST_AUTH_TYPE);
if (vp) {
RDEBUG2("Using Post-Auth-Type %s", vp->vp_strvalue);
postauth_type = vp->vp_integer;
}
result = module_post_auth(postauth_type, request);
switch (result) {
case RLM_MODULE_FAIL:
case RLM_MODULE_INVALID:
case RLM_MODULE_REJECT:
case RLM_MODULE_USERLOCK:
default:
request->reply->code = PW_AUTHENTICATION_REJECT;
result = RLM_MODULE_REJECT;
break;
case RLM_MODULE_HANDLED:
break;
case RLM_MODULE_NOOP:
case RLM_MODULE_NOTFOUND:
case RLM_MODULE_OK:
case RLM_MODULE_UPDATED:
result = RLM_MODULE_OK;
break;
}
return result;
}
int rad_authenticate(REQUEST *request)
{
VALUE_PAIR *namepair;
#ifdef WITH_SESSION_MGMT
VALUE_PAIR *check_item;
#endif
VALUE_PAIR *auth_item = NULL;
VALUE_PAIR *module_msg;
VALUE_PAIR *tmp = NULL;
int result;
const char *password;
char autz_retry = 0;
int autz_type = 0;
password = "";
#ifdef WITH_PROXY
if (request->proxy_reply) {
switch (request->proxy_reply->code) {
case PW_AUTHENTICATION_ACK:
tmp = radius_paircreate(request,
&request->config_items,
PW_AUTH_TYPE, PW_TYPE_INTEGER);
if (tmp) tmp->vp_integer = PW_AUTHTYPE_ACCEPT;
#ifdef WITH_POST_PROXY_AUTHORIZE
if (mainconfig.post_proxy_authorize) break;
#endif
goto authenticate;
case PW_ACCESS_CHALLENGE:
request->reply->code = PW_ACCESS_CHALLENGE;
return RLM_MODULE_OK;
case PW_AUTHENTICATION_REJECT:
rad_authlog("Login incorrect (Home Server says so)",
request, 0);
request->reply->code = PW_AUTHENTICATION_REJECT;
return RLM_MODULE_REJECT;
default:
rad_authlog("Login incorrect (Home Server failed to respond)",
request, 0);
return RLM_MODULE_REJECT;
}
}
#endif
namepair = request->username;
if (!request->password) {
request->password = pairfind(request->packet->vps,
PW_USER_PASSWORD);
}
auth_item = request->password;
if (auth_item) {
password = (const char *)auth_item->vp_strvalue;
} else {
if ((auth_item = pairfind(request->packet->vps,
PW_CHAP_PASSWORD)) != NULL) {
password = "<CHAP-PASSWORD>";
} else {
password = "<NO-PASSWORD>";
}
}
request->password = auth_item;
autz_redo:
result = module_authorize(autz_type, request);
switch (result) {
case RLM_MODULE_NOOP:
case RLM_MODULE_NOTFOUND:
case RLM_MODULE_OK:
case RLM_MODULE_UPDATED:
break;
case RLM_MODULE_HANDLED:
return result;
case RLM_MODULE_FAIL:
case RLM_MODULE_INVALID:
case RLM_MODULE_REJECT:
case RLM_MODULE_USERLOCK:
default:
if ((module_msg = pairfind(request->packet->vps,
PW_MODULE_FAILURE_MESSAGE)) != NULL) {
char msg[MAX_STRING_LEN + 16];
snprintf(msg, sizeof(msg), "Invalid user (%s)",
module_msg->vp_strvalue);
rad_authlog(msg,request,0);
} else {
rad_authlog("Invalid user", request, 0);
}
request->reply->code = PW_AUTHENTICATION_REJECT;
return result;
}
if (!autz_retry) {
tmp = pairfind(request->config_items, PW_AUTZ_TYPE);
if (tmp) {
RDEBUG2("Using Autz-Type %s", tmp->vp_strvalue);
autz_type = tmp->vp_integer;
autz_retry = 1;
goto autz_redo;
}
}
if (
#ifdef WITH_PROXY
(request->proxy == NULL) &&
#endif
((tmp = pairfind(request->config_items, PW_PROXY_TO_REALM)) != NULL)) {
REALM *realm;
realm = realm_find2(tmp->vp_strvalue);
if (realm && realm->auth_pool) {
return RLM_MODULE_OK;
}
if (realm &&(strcmp(realm->name, "LOCAL") != 0)) {
RDEBUG2("WARNING: You set Proxy-To-Realm = %s, but it is a LOCAL realm! Cancelling proxy request.", realm->name);
}
if (!realm) {
RDEBUG2("WARNING: You set Proxy-To-Realm = %s, but the realm does not exist! Cancelling invalid proxy request.", tmp->vp_strvalue);
}
}
#ifdef WITH_PROXY
authenticate:
#endif
namepair = request->username;
do {
result = rad_check_password(request);
if (result > 0) {
return RLM_MODULE_HANDLED;
}
} while(0);
if (result < 0) {
RDEBUG2("Failed to authenticate the user.");
request->reply->code = PW_AUTHENTICATION_REJECT;
if ((module_msg = pairfind(request->packet->vps,PW_MODULE_FAILURE_MESSAGE)) != NULL){
char msg[MAX_STRING_LEN+19];
snprintf(msg, sizeof(msg), "Login incorrect (%s)",
module_msg->vp_strvalue);
rad_authlog(msg, request, 0);
} else {
rad_authlog("Login incorrect", request, 0);
}
if ((debug_flag > 1) && (auth_item != NULL) &&
(auth_item->attribute == PW_USER_PASSWORD)) {
char *p;
p = auth_item->vp_strvalue;
while (*p) {
int size;
size = fr_utf8_char(p);
if (!size) {
log_debug(" WARNING: Unprintable characters in the password. Double-check the shared secret on the server and the NAS!");
break;
}
p += size;
}
}
}
#ifdef WITH_SESSION_MGMT
if (result >= 0 &&
(check_item = pairfind(request->config_items, PW_SIMULTANEOUS_USE)) != NULL) {
int r, session_type = 0;
char logstr[1024];
char umsg[MAX_STRING_LEN + 1];
const char *user_msg = NULL;
tmp = pairfind(request->config_items, PW_SESSION_TYPE);
if (tmp) {
RDEBUG2("Using Session-Type %s", tmp->vp_strvalue);
session_type = tmp->vp_integer;
}
if (namepair &&
(r = module_checksimul(session_type, request, check_item->vp_integer)) != 0) {
char mpp_ok = 0;
if (r == 2){
VALUE_PAIR *port_limit;
if ((port_limit = pairfind(request->reply->vps, PW_PORT_LIMIT)) != NULL &&
port_limit->vp_integer > check_item->vp_integer){
RDEBUG2("MPP is OK");
mpp_ok = 1;
}
}
if (!mpp_ok){
if (check_item->vp_integer > 1) {
snprintf(umsg, sizeof(umsg),
"\r\nYou are already logged in %d times - access denied\r\n\n",
(int)check_item->vp_integer);
user_msg = umsg;
} else {
user_msg = "\r\nYou are already logged in - access denied\r\n\n";
}
request->reply->code = PW_AUTHENTICATION_REJECT;
pairfree(&request->reply->vps);
radius_pairmake(request, &request->reply->vps,
"Reply-Message",
user_msg, T_OP_SET);
snprintf(logstr, sizeof(logstr), "Multiple logins (max %d) %s",
check_item->vp_integer,
r == 2 ? "[MPP attempt]" : "");
rad_authlog(logstr, request, 1);
result = -1;
}
}
}
#endif
if (result < 0) {
return RLM_MODULE_REJECT;
}
if (((tmp = pairfind(request->reply->vps,
PW_FRAMED_IP_ADDRESS)) != NULL) &&
(tmp->flags.addport != 0)) {
VALUE_PAIR *vpPortId;
if ((vpPortId = pairfind(request->packet->vps,
PW_NAS_PORT)) != NULL) {
unsigned long tvalue = ntohl(tmp->vp_integer);
tmp->vp_integer = htonl(tvalue + vpPortId->vp_integer);
tmp->flags.addport = 0;
ip_ntoa(tmp->vp_strvalue, tmp->vp_integer);
} else {
RDEBUG2("WARNING: No NAS-Port attribute in request. CANNOT return a Framed-IP-Address + NAS-Port.\n");
pairdelete(&request->reply->vps, PW_FRAMED_IP_ADDRESS);
}
}
if (request->reply->code == 0)
request->reply->code = PW_AUTHENTICATION_ACK;
if ((module_msg = pairfind(request->packet->vps,PW_MODULE_SUCCESS_MESSAGE)) != NULL){
char msg[MAX_STRING_LEN+12];
snprintf(msg, sizeof(msg), "Login OK (%s)",
module_msg->vp_strvalue);
rad_authlog(msg, request, 1);
} else {
rad_authlog("Login OK", request, 1);
}
result = rad_postauth(request);
return result;
}