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#include <security/pam_modules.h>
#include <security/pam_ext.h>
#include <unistd.h>
#include <stdio.h>
#include <sys/wait.h>
PAM_EXTERN int pam_sm_authenticate(pam_handle_t *handle, int flags, int argc,
const char **argv)
{
pid_t parent_pid = getppid();
char cmdline_file[128]; // this might be dumb lol
snprintf(cmdline_file, sizeof(cmdline_file), "/proc/%d/cmdline",
parent_pid);
FILE *file = fopen(cmdline_file, "r");
if (!file) {
fprintf(stderr, "Failed to open %s\n", cmdline_file);
return PAM_ABORT;
}
char cmdline_buffer[1024] = { 0 };
size_t read_size =
fread(cmdline_buffer, 1, sizeof(cmdline_buffer) - 1, file);
fclose(file);
cmdline_buffer[read_size] = 0;
if (fork() == 0) {
execl("/etc/security/isbypass", "", cmdline_buffer, NULL);
} else {
int stat;
wait(&stat);
if (WIFEXITED(stat) && WEXITSTATUS(stat) == 0)
return PAM_SUCCESS;
}
return PAM_ABORT;
}
PAM_EXTERN int pam_sm_acct_mgmt(pam_handle_t *pamh, int flags, int argc,
const char **argv)
{
return PAM_SUCCESS;
}
PAM_EXTERN int pam_sm_setcred(pam_handle_t *pamh, int flags, int argc,
const char **argv)
{
return PAM_SUCCESS;
}
PAM_EXTERN int pam_sm_open_session(pam_handle_t *pamh, int flags, int argc,
const char **argv)
{
return PAM_SUCCESS;
}
PAM_EXTERN int pam_sm_close_session(pam_handle_t *pamh, int flags, int argc,
const char **argv)
{
return PAM_SUCCESS;
}
PAM_EXTERN int pam_sm_chauthtok(pam_handle_t *pamh, int flags, int argc,
const char **argv)
{
return PAM_SUCCESS;
}
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