Mercurial > crates > nonstick

annotate pam/src/conv.rs @ 15:27730595f1ea

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Adding pam-http module
author Anthony Nowell <anthony@algorithmia.com>
date Sun, 24 Sep 2017 00:22:29 -0600
parents
children 0ceeffe67ec4
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
15
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
1 use libc::{c_char, c_int};
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
2 use std::ptr;
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
3 use std::ffi::{CStr, CString};
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
4
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
5 use constants::PamResultCode;
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
6 use constants::*;
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
7 use module::{PamItem, PamResult};
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 #[allow(missing_copy_implementations)]
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
10 pub enum AppDataPtr {}
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
11
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
12 #[repr(C)]
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
13 struct PamMessage {
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
14 msg_style: PamMessageStyle,
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
15 msg: *const c_char,
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
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
18 #[repr(C)]
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
19 struct PamResponse {
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
20 resp: *const c_char,
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
21 resp_retcode: AlwaysZero,
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
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
24 /// `PamConv` acts as a channel for communicating with user.
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
25 ///
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
26 /// Communication is mediated by the pam client (the application that invoked
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
27 /// pam). Messages sent will be relayed to the user by the client, and response
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
28 /// will be relayed back.
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
29 #[repr(C)]
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
30 pub struct PamConv {
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
31 conv: extern "C" fn(num_msg: c_int,
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
32 pam_message: &&PamMessage,
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
33 pam_response: &mut *const PamResponse,
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
34 appdata_ptr: *const AppDataPtr)
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
35 -> PamResultCode,
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
36 appdata_ptr: *const AppDataPtr,
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
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
39 impl PamConv {
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
40 /// Sends a message to the pam client.
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
41 ///
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
42 /// This will typically result in the user seeing a message or a prompt.
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
43 /// There are several message styles available:
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
44 ///
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
45 /// - PAM_PROMPT_ECHO_OFF
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
46 /// - PAM_PROMPT_ECHO_ON
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
47 /// - PAM_ERROR_MSG
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
48 /// - PAM_TEXT_INFO
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
49 /// - PAM_RADIO_TYPE
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
50 /// - PAM_BINARY_PROMPT
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
51 ///
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
52 /// Note that the user experience will depend on how the client implements
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
53 /// these message styles - and not all applications implement all message
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
54 /// styles.
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
55 pub fn send(&self, style: PamMessageStyle, msg: &str) -> PamResult<Option<String>> {
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
56 let mut resp_ptr: *const PamResponse = ptr::null();
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
57 let msg = PamMessage {
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
58 msg_style: style,
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
59 msg: CString::new(msg).unwrap().as_ptr(),
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
60 };
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
61
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
62 let ret = (self.conv)(1, &&msg, &mut resp_ptr, self.appdata_ptr);
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
63
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
64 if PamResultCode::PAM_SUCCESS == ret {
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
65 if resp_ptr.is_null() {
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
66 Ok(None)
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
67 } else {
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
68 let bytes = unsafe { CStr::from_ptr((*resp_ptr).resp).to_bytes() };
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
69 Ok(String::from_utf8(bytes.to_vec()).ok())
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
70 }
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
71 } else {
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
72 Err(ret)
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
73 }
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
74 }
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
75 }
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
76
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
77 impl PamItem for PamConv {
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
78 fn item_type() -> PamItemType {
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
79 PAM_CONV
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
80 }
27730595f1ea Adding pam-http module
Anthony Nowell <anthony@algorithmia.com>
parents:
diff changeset
81 }