#include <freeradius-devel/ident.h>
RCSID("$Id$")
#include <freeradius-devel/radiusd.h>
#include <freeradius-devel/modules.h>
#include "config.h"
#ifdef HAVE_SECURITY_PAM_APPL_H
#include <security/pam_appl.h>
#endif
#ifdef HAVE_PAM_PAM_APPL_H
#include <pam/pam_appl.h>
#endif
#ifdef HAVE_SYSLOG_H
#include <syslog.h>
#endif
typedef struct rlm_pam_t {
const char *pam_auth_name;
} rlm_pam_t;
static const CONF_PARSER module_config[] = {
{ "pam_auth", PW_TYPE_STRING_PTR, offsetof(rlm_pam_t,pam_auth_name),
NULL, "radiusd" },
{ NULL, -1, 0, NULL, NULL }
};
static int pam_instantiate(CONF_SECTION *conf, void **instance)
{
rlm_pam_t *data;
data = rad_malloc(sizeof(*data));
if (!data) {
return -1;
}
memset(data, 0, sizeof(*data));
if (cf_section_parse(conf, data, module_config) < 0) {
free(data);
return -1;
}
*instance = data;
return 0;
}
static int pam_detach(void *instance)
{
rlm_pam_t *data = (rlm_pam_t *) instance;
free((char *) data);
return 0;
}
typedef struct my_PAM {
const char *username;
const char *password;
int error;
} my_PAM;
static int PAM_conv (int num_msg,
const struct pam_message **msg,
struct pam_response **resp,
void *appdata_ptr) {
int count;
struct pam_response *reply;
my_PAM *pam_config = (my_PAM *) appdata_ptr;
#define COPY_STRING(s) ((s) ? strdup(s) : NULL)
reply = rad_malloc(num_msg * sizeof(struct pam_response));
memset(reply, 0, num_msg * sizeof(struct pam_response));
for (count = 0; count < num_msg; count++) {
switch (msg[count]->msg_style) {
case PAM_PROMPT_ECHO_ON:
reply[count].resp_retcode = PAM_SUCCESS;
reply[count].resp = COPY_STRING(pam_config->username);
break;
case PAM_PROMPT_ECHO_OFF:
reply[count].resp_retcode = PAM_SUCCESS;
reply[count].resp = COPY_STRING(pam_config->password);
break;
case PAM_TEXT_INFO:
break;
case PAM_ERROR_MSG:
default:
for (count = 0; count < num_msg; count++) {
if (reply[count].resp) {
memset(reply[count].resp, 0, strlen(reply[count].resp));
free(reply[count].resp);
}
}
free(reply);
pam_config->error = 1;
return PAM_CONV_ERR;
}
}
*resp = reply;
return PAM_SUCCESS;
}
static int pam_pass(const char *name, const char *passwd, const char *pamauth)
{
pam_handle_t *pamh=NULL;
int retval;
my_PAM pam_config;
struct pam_conv conv;
conv.conv = PAM_conv;
conv.appdata_ptr = &pam_config;
pam_config.username = name;
pam_config.password = passwd;
pam_config.error = 0;
DEBUG("pam_pass: using pamauth string <%s> for pam.conf lookup", pamauth);
retval = pam_start(pamauth, name, &conv, &pamh);
if (retval != PAM_SUCCESS) {
DEBUG("pam_pass: function pam_start FAILED for <%s>. Reason: %s",
name, pam_strerror(pamh, retval));
return -1;
}
retval = pam_authenticate(pamh, 0);
if (retval != PAM_SUCCESS) {
DEBUG("pam_pass: function pam_authenticate FAILED for <%s>. Reason: %s",
name, pam_strerror(pamh, retval));
pam_end(pamh, retval);
return -1;
}
#if !defined(__FreeBSD_version) || (__FreeBSD_version >= 400000)
retval = pam_acct_mgmt(pamh, 0);
if (retval != PAM_SUCCESS) {
DEBUG("pam_pass: function pam_acct_mgmt FAILED for <%s>. Reason: %s",
name, pam_strerror(pamh, retval));
pam_end(pamh, retval);
return -1;
}
#endif
DEBUG("pam_pass: authentication succeeded for <%s>", name);
pam_end(pamh, retval);
return 0;
}
static int pam_auth(void *instance, REQUEST *request)
{
int r;
VALUE_PAIR *pair;
rlm_pam_t *data = (rlm_pam_t *) instance;
const char *pam_auth_string = data->pam_auth_name;
if (!request->username) {
radlog(L_AUTH, "rlm_pam: Attribute \"User-Name\" is required for authentication.");
return RLM_MODULE_INVALID;
}
if (!request->password) {
radlog(L_AUTH, "rlm_pam: Attribute \"User-Password\" is required for authentication.");
return RLM_MODULE_INVALID;
}
if (request->password->attribute != PW_USER_PASSWORD) {
radlog(L_AUTH, "rlm_pam: Attribute \"User-Password\" is required for authentication. Cannot use \"%s\".", request->password->name);
return RLM_MODULE_INVALID;
}
pair = pairfind(request->config_items, PAM_AUTH_ATTR);
if (pair) pam_auth_string = (char *)pair->vp_strvalue;
r = pam_pass((char *)request->username->vp_strvalue,
(char *)request->password->vp_strvalue,
pam_auth_string);
if (r == 0) {
return RLM_MODULE_OK;
}
return RLM_MODULE_REJECT;
}
module_t rlm_pam = {
RLM_MODULE_INIT,
"pam",
RLM_TYPE_THREAD_UNSAFE,
pam_instantiate,
pam_detach,
{
pam_auth,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL
},
};