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extern crate pam_sys;
mod authenticator;
mod env;
mod ffi;
use pam_sys::PamReturnCode;
use std::ffi::{CStr, CString};
pub use crate::authenticator::*;
pub struct PamError(PamReturnCode);
pub type PamResult<T> = std::result::Result<T, PamError>;
impl std::fmt::Debug for PamError {
fn fmt(&self, fmt: &mut std::fmt::Formatter) -> std::fmt::Result {
self.0.fmt(fmt)
}
}
impl std::fmt::Display for PamError {
fn fmt(&self, fmt: &mut std::fmt::Formatter) -> std::fmt::Result {
self.0.fmt(fmt)
}
}
impl std::error::Error for PamError {
fn description(&self) -> &str {
"PAM returned an error code"
}
}
impl From<PamReturnCode> for PamError {
fn from(err: PamReturnCode) -> PamError {
PamError(err)
}
}
pub trait Converse {
fn prompt_echo(&mut self, msg: &CStr) -> ::std::result::Result<CString, ()>;
fn prompt_blind(&mut self, msg: &CStr) -> ::std::result::Result<CString, ()>;
fn info(&mut self, msg: &CStr);
fn error(&mut self, msg: &CStr);
fn username(&self) -> &str;
}
pub struct PasswordConv {
login: String,
passwd: String,
}
impl PasswordConv {
fn new() -> PasswordConv {
PasswordConv {
login: String::new(),
passwd: String::new(),
}
}
pub fn set_credentials<U: Into<String>, V: Into<String>>(&mut self, login: U, password: V) {
self.login = login.into();
self.passwd = password.into();
}
}
impl Converse for PasswordConv {
fn prompt_echo(&mut self, _msg: &CStr) -> Result<CString, ()> {
CString::new(self.login.clone()).map_err(|_| ())
}
fn prompt_blind(&mut self, _msg: &CStr) -> Result<CString, ()> {
CString::new(self.passwd.clone()).map_err(|_| ())
}
fn info(&mut self, _msg: &CStr) {}
fn error(&mut self, msg: &CStr) {
eprintln!("[PAM ERROR] {}", msg.to_string_lossy());
}
fn username(&self) -> &str {
&self.login
}
}