84 lines
2.4 KiB
C
84 lines
2.4 KiB
C
/*
|
|
* Copyright (c) 2020 Nicholas Sica
|
|
*
|
|
* Permission to use, copy, modify, and/or distribute this software for any
|
|
* purpose with or without fee is hereby granted, provided that the above
|
|
* copyright notice and this permission notice appear in all copies.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
|
|
* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
|
|
* AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
|
|
* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
|
|
* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
|
|
* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
|
|
* PERFORMANCE OF THIS SOFTWARE.
|
|
*/
|
|
|
|
#include "pam_auth.h"
|
|
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <security/pam_appl.h>
|
|
#include <neatvnc.h>
|
|
|
|
struct credentials {
|
|
const char* user;
|
|
const char* password;
|
|
};
|
|
|
|
static int pam_return_pwd(int num_msg, const struct pam_message** msgm,
|
|
struct pam_response** response, void* appdata_ptr)
|
|
{
|
|
struct credentials* cred = appdata_ptr;
|
|
struct pam_response* resp = calloc(sizeof(*response), num_msg);
|
|
for (int i = 0; i < num_msg; i++) {
|
|
resp[i].resp_retcode = PAM_SUCCESS;
|
|
switch(msgm[i]->msg_style) {
|
|
case PAM_PROMPT_ECHO_OFF:
|
|
resp[i].resp = strdup(cred->password);
|
|
break;
|
|
default:
|
|
goto error;
|
|
}
|
|
}
|
|
|
|
*response = resp;
|
|
return PAM_SUCCESS;
|
|
|
|
error:
|
|
for (int i = 0; i < num_msg; i++) {
|
|
free(resp[i].resp);
|
|
}
|
|
free(resp);
|
|
return PAM_CONV_ERR;
|
|
}
|
|
|
|
bool pam_auth(const char* username, const char* password)
|
|
{
|
|
struct credentials cred = { username, password };
|
|
struct pam_conv conv = { &pam_return_pwd, &cred };
|
|
const char* service = "wayvnc";
|
|
pam_handle_t* pamh;
|
|
int result = pam_start(service, username, &conv, &pamh);
|
|
if (result != PAM_SUCCESS) {
|
|
nvnc_log(NVNC_LOG_ERROR, "ERROR: PAM start failed: %s", pam_strerror(pamh, result));
|
|
return false;
|
|
}
|
|
|
|
result = pam_authenticate(pamh, PAM_SILENT|PAM_DISALLOW_NULL_AUTHTOK);
|
|
if (result != PAM_SUCCESS) {
|
|
nvnc_log(NVNC_LOG_ERROR, "PAM authenticate failed: %s", pam_strerror(pamh, result));
|
|
goto error;
|
|
}
|
|
|
|
result = pam_acct_mgmt(pamh, 0);
|
|
if (result != PAM_SUCCESS) {
|
|
nvnc_log(NVNC_LOG_ERROR, "PAM account management failed: %s", pam_strerror(pamh, result));
|
|
goto error;
|
|
}
|
|
|
|
error:
|
|
pam_end(pamh, result);
|
|
return result == PAM_SUCCESS;
|
|
}
|