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use std::ptr; use std::ffi::{CStr, CString}; use std::os::raw::{c_char, c_int, c_uint, c_void}; pub type PamHandleT = *const c_uint; pub type PamFlags = c_uint; pub type PamResult<T> = Result<T, PamResultCode>; pub const PAM_SILENT: PamFlags = 0x8000; pub fn get_user(pamh: PamHandleT) -> PamResult<String> { get_item(pamh, PamItemType::PAM_USER).map(|u| unsafe { CStr::from_ptr(u as *const i8) .to_string_lossy() .into_owned() }) } pub fn set_user(pamh: PamHandleT, username: String) -> PamResult<()> { let user_string = CString::new(username).unwrap(); let byte_string = user_string.as_bytes_with_nul(); set_item( pamh, PamItemType::PAM_USER, byte_string.as_ptr() as *const c_void, ) } fn set_item(pamh: PamHandleT, item_type: PamItemType, item: *const c_void) -> PamResult<()> { let r = unsafe { pam_set_item(pamh, item_type, item) }; match r { PamResultCode::PAM_SUCCESS => Ok(()), _ => Err(r), } } fn get_item(pamh: PamHandleT, item_type: PamItemType) -> PamResult<*const c_void> { let mut raw_item: *const c_void = ptr::null(); let r = unsafe { pam_get_item(pamh, item_type, &mut raw_item) }; if raw_item.is_null() { Err(r) } else { Ok(raw_item) } } fn extract_argv(argc: c_int, argv: *const *const c_char) -> Vec<String> { (0..argc) .map(|o| unsafe { CStr::from_ptr(*argv.offset(o as isize) as *const c_char) .to_string_lossy() .into_owned() }) .collect() } #[test] fn test_extract_argv() { let argc: c_int = 3; let argv: *const *const c_char = [ CString::new("one").unwrap().as_ptr(), CString::new("two").unwrap().as_ptr(), CString::new("three").unwrap().as_ptr(), ].as_ptr(); let expected = vec![ String::from("one"), String::from("two"), String::from("three"), ]; assert_eq!(extract_argv(argc, argv), expected); } #[link(name = "pam")] extern "C" { fn pam_set_item(pamh: PamHandleT, item_type: PamItemType, item: *const c_void) -> PamResultCode; fn pam_get_item( pamh: PamHandleT, item_type: PamItemType, item: *mut *const c_void, ) -> PamResultCode; } #[allow(non_camel_case_types, dead_code)] #[derive(Debug)] #[repr(C)] pub enum PamItemType { PAM_SERVICE = 1, PAM_USER = 2, PAM_TTY = 3, PAM_RHOST = 4, PAM_CONV = 5, PAM_AUTHTOK = 6, PAM_OLDAUTHTOK = 7, PAM_RUSER = 8, PAM_USER_PROMPT = 9, PAM_FAIL_DELAY = 10, PAM_XDISPLAY = 11, PAM_XAUTHDATA = 12, PAM_AUTHTOK_TYPE = 13, } #[allow(non_camel_case_types, dead_code)] #[derive(Debug)] #[repr(C)] pub enum PamResultCode { PAM_SUCCESS = 0, PAM_OPEN_ERR = 1, PAM_SYMBOL_ERR = 2, PAM_SERVICE_ERR = 3, PAM_SYSTEM_ERR = 4, PAM_BUF_ERR = 5, PAM_PERM_DENIED = 6, PAM_AUTH_ERR = 7, PAM_CRED_INSUFFICIENT = 8, PAM_AUTHINFO_UNAVAIL = 9, PAM_USER_UNKNOWN = 10, PAM_MAXTRIES = 11, PAM_NEW_AUTHTOK_REQD = 12, PAM_ACCT_EXPIRED = 13, PAM_SESSION_ERR = 14, PAM_CRED_UNAVAIL = 15, PAM_CRED_EXPIRED = 16, PAM_CRED_ERR = 17, PAM_NO_MODULE_DATA = 18, PAM_CONV_ERR = 19, PAM_AUTHTOK_ERR = 20, PAM_AUTHTOK_RECOVERY_ERR = 21, PAM_AUTHTOK_LOCK_BUSY = 22, PAM_AUTHTOK_DISABLE_AGING = 23, PAM_TRY_AGAIN = 24, PAM_IGNORE = 25, PAM_ABORT = 26, PAM_AUTHTOK_EXPIRED = 27, PAM_MODULE_UNKNOWN = 28, PAM_BAD_ITEM = 29, PAM_CONV_AGAIN = 30, PAM_INCOMPLETE = 31, } pub mod callbacks { use super::*; #[no_mangle] pub extern "C" fn pam_sm_acct_mgmt( pamh: PamHandleT, flags: PamFlags, argc: c_int, argv: *const *const c_char, ) -> PamResultCode { let args = extract_argv(argc, argv); let silent = (flags & PAM_SILENT) != 0; super::super::acct_mgmt(pamh, args, silent) } #[no_mangle] pub extern "C" fn pam_sm_authenticate( _: PamHandleT, _: PamFlags, _: c_int, _: *const *const c_char, ) -> PamResultCode { PamResultCode::PAM_IGNORE } #[no_mangle] pub extern "C" fn pam_sm_chauthtok( _: PamHandleT, _: PamFlags, _: c_int, _: *const *const c_char, ) -> PamResultCode { PamResultCode::PAM_IGNORE } #[no_mangle] pub extern "C" fn pam_sm_close_session( _: PamHandleT, _: PamFlags, _: c_int, _: *const *const c_char, ) -> PamResultCode { PamResultCode::PAM_IGNORE } #[no_mangle] pub extern "C" fn pam_sm_open_session( _: PamHandleT, _: PamFlags, _: c_int, _: *const *const c_char, ) -> PamResultCode { PamResultCode::PAM_IGNORE } #[no_mangle] pub extern "C" fn pam_sm_setcred( _: PamHandleT, _: PamFlags, _: c_int, _: *const *const c_char, ) -> PamResultCode { PamResultCode::PAM_IGNORE } }