crates/nonstick: pam/src/module.rs annotate

author	Anthony Nowell <anthony@algorithmia.com>
date	Sun, 24 Sep 2017 00:22:29 -0600
parents
children	d654aa0655e5

rev	line source
15 27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	1 //! Functions for use in pam modules.
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	2
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	3 use libc::c_char;
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	4 use std::{mem, ptr};
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	5 use std::ffi::{CStr, CString};
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	6
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	7 use constants::{PamResultCode, PamItemType};
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	8
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	9 /// Opaque type, used as a pointer when making pam API calls.
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	10 ///
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	11 /// A module is invoked via an external function such as `pam_sm_authenticate`.
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	12 /// Such a call provides a pam handle pointer. The same pointer should be given
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	13 /// as an argument when making API calls.
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	14 #[allow(missing_copy_implementations)]
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	15 pub enum PamHandleT {}
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	16
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	17 #[allow(missing_copy_implementations)]
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	18 enum PamItemT {}
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	19
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	20 #[allow(missing_copy_implementations)]
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	21 pub enum PamDataT {}
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	22
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	23 #[link(name = "pam")]
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	24 extern "C" {
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	25 fn pam_get_data(pamh: *const PamHandleT,
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	26 module_data_name: *const c_char,
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	27 data: &mut *const PamDataT)
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	28 -> PamResultCode;
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	29
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	30 fn pam_set_data(pamh: *const PamHandleT,
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	31 module_data_name: *const c_char,
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	32 data: Box<PamDataT>,
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	33 cleanup: extern "C" fn(pamh: *const PamHandleT,
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	34 data: Box<PamDataT>,
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	35 error_status: PamResultCode))
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	36 -> PamResultCode;
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	37
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	38 fn pam_get_item(pamh: *const PamHandleT,
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	39 item_type: PamItemType,
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	40 item: &mut *const PamItemT)
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	41 -> PamResultCode;
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	42
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	43 fn pam_set_item(pamh: *mut PamHandleT,
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	44 item_type: PamItemType,
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	45 item: &PamItemT)
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	46 -> PamResultCode;
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	47
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	48 fn pam_get_user(pamh: *const PamHandleT,
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	49 user: &*mut c_char,
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	50 prompt: *const c_char)
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	51 -> PamResultCode;
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	52 }
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	53
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	54 pub type PamResult<T> = Result<T, PamResultCode>;
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	55
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	56 /// Type-level mapping for safely retrieving values with `get_item`.
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	57 ///
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	58 /// See `pam_get_item` in
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	59 /// http://www.linux-pam.org/Linux-PAM-html/mwg-expected-by-module-item.html
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	60 pub trait PamItem {
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	61 /// Maps a Rust type to a pam constant.
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	62 ///
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	63 /// For example, the type PamConv maps to the constant PAM_CONV. The pam
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	64 /// API contract specifies that when the API function `pam_get_item` is
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	65 /// called with the constant PAM_CONV, it will return a value of type
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	66 /// `PamConv`.
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	67 fn item_type() -> PamItemType;
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	68 }
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	69
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	70 /// Gets some value, identified by `key`, that has been set by the module
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	71 /// previously.
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	72 ///
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	73 /// See `pam_get_data` in
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	74 /// http://www.linux-pam.org/Linux-PAM-html/mwg-expected-by-module-item.html
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	75 pub unsafe fn get_data<'a, T>(pamh: &'a PamHandleT, key: &str) -> PamResult<&'a T> {
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	76 let c_key = CString::new(key).unwrap().as_ptr();
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	77 let mut ptr: *const PamDataT = ptr::null();
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	78 let res = pam_get_data(pamh, c_key, &mut ptr);
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	79 if PamResultCode::PAM_SUCCESS == res && !ptr.is_null() {
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	80 let typed_ptr: *const T = mem::transmute(ptr);
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	81 let data: &T = &*typed_ptr;
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	82 Ok(data)
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	83 } else {
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	84 Err(res)
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	85 }
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	86 }
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	87
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	88 /// Stores a value that can be retrieved later with `get_data`. The value lives
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	89 /// as long as the current pam cycle.
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	90 ///
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	91 /// See `pam_set_data` in
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	92 /// http://www.linux-pam.org/Linux-PAM-html/mwg-expected-by-module-item.html
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	93 pub fn set_data<T>(pamh: &PamHandleT, key: &str, data: Box<T>) -> PamResult<()> {
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	94 let c_key = CString::new(key).unwrap().as_ptr();
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	95 let res = unsafe {
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	96 let c_data: Box<PamDataT> = mem::transmute(data);
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	97 pam_set_data(pamh, c_key, c_data, cleanup::<T>)
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	98 };
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	99 if PamResultCode::PAM_SUCCESS == res {
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	100 Ok(())
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	101 } else {
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	102 Err(res)
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	103 }
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	104 }
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	105
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	106 #[no_mangle]
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	107 pub extern "C" fn cleanup<T>(_: *const PamHandleT, c_data: Box<PamDataT>, _: PamResultCode) {
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	108 unsafe {
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	109 let data: Box<T> = mem::transmute(c_data);
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	110 mem::drop(data);
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	111 }
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	112 }
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	113
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	114 /// Retrieves a value that has been set, possibly by the pam client. This is
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	115 /// particularly useful for getting a `PamConv` reference.
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	116 ///
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	117 /// See `pam_get_item` in
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	118 /// http://www.linux-pam.org/Linux-PAM-html/mwg-expected-by-module-item.html
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	119 pub fn get_item<'a, T: PamItem>(pamh: &'a PamHandleT) -> PamResult<&'a T> {
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	120 let mut ptr: *const PamItemT = ptr::null();
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	121 let (res, item) = unsafe {
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	122 let r = pam_get_item(pamh, T::item_type(), &mut ptr);
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	123 let typed_ptr: *const T = mem::transmute(ptr);
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	124 let t: &T = &*typed_ptr;
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	125 (r, t)
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	126 };
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	127 if PamResultCode::PAM_SUCCESS == res {
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	128 Ok(item)
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	129 } else {
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	130 Err(res)
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	131 }
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	132 }
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	133
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	134 /// Sets a value in the pam context. The value can be retrieved using
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	135 /// `get_item`.
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	136 ///
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	137 /// Note that all items are strings, except `PAM_CONV` and `PAM_FAIL_DELAY`.
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	138 ///
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	139 /// See `pam_set_item` in
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	140 /// http://www.linux-pam.org/Linux-PAM-html/mwg-expected-by-module-item.html
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	141 pub fn set_item_str<'a, T: PamItem>(pamh: &'a mut PamHandleT, item: &str) -> PamResult<()> {
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	142 let c_item = CString::new(item).unwrap().as_ptr();
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	143
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	144 let res = unsafe {
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	145 pam_set_item(pamh,
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	146 T::item_type(),
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	147
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	148 // unwrapping is okay here, as c_item will not be a NULL
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	149 // pointer
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	150 (c_item as *const PamItemT).as_ref().unwrap())
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	151 };
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	152 if PamResultCode::PAM_SUCCESS == res {
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	153 Ok(())
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	154 } else {
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	155 Err(res)
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	156 }
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	157 }
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	158
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	159 /// Retrieves the name of the user who is authenticating or logging in.
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	160 ///
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	161 /// This is really a specialization of `get_item`.
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	162 ///
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	163 /// See `pam_get_user` in
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	164 /// http://www.linux-pam.org/Linux-PAM-html/mwg-expected-by-module-item.html
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	165 pub fn get_user<'a>(pamh: &'a PamHandleT, prompt: Option<&str>) -> PamResult<String> {
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	166 let ptr: *mut c_char = ptr::null_mut();
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	167 let c_prompt = match prompt {
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	168 Some(p) => CString::new(p).unwrap().as_ptr(),
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	169 None => ptr::null(),
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	170 };
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	171 let res = unsafe { pam_get_user(pamh, &ptr, c_prompt) };
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	172 if PamResultCode::PAM_SUCCESS == res && !ptr.is_null() {
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	173 let const_ptr = ptr as *const c_char;
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	174 let bytes = unsafe { CStr::from_ptr(const_ptr).to_bytes() };
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	175 String::from_utf8(bytes.to_vec()).map_err(\|_\| PamResultCode::PAM_CONV_ERR)
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	176 } else {
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	177 Err(res)
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	178 }
27730595f1ea Adding pam-http module Anthony Nowell <anthony@algorithmia.com> parents: diff changeset	179 }

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27730595f1ea Adding pam-http module