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annotate src/libpam/handle.rs @ 132:0b6a17f8c894 default tip

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Get constant test working again with OpenPAM.
author Paul Fisher <paul@pfish.zone>
date Wed, 02 Jul 2025 02:34:29 -0400
parents a632a8874131
children
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1 use super::conversation::LibPamConversation;
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2 use crate::constants::{ErrorCode, Result};
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3 use crate::conv::Exchange;
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4 use crate::environ::EnvironMapMut;
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5 use crate::handle::PamShared;
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6 use crate::libpam::environ::{LibPamEnviron, LibPamEnvironMut};
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7 use crate::libpam::memory;
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8 use crate::logging::{Level, Location};
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9 use crate::{
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10 guide, linklist, stdlinks, Conversation, EnvironMap, Flags, PamHandleApplication,
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11 PamHandleModule,
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12 };
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13 use num_enum::{IntoPrimitive, TryFromPrimitive};
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14 use std::cell::Cell;
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15 use std::ffi::{c_char, c_int, CString};
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16
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17 use libpam_sys::cfg_pam_impl;
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18 use std::ptr;
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19 use std::ptr::NonNull;
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20
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21 /// Owner for a PAM handle.
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22 pub struct LibPamHandle(pub NonNull<libpam_sys::pam_handle>);
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23
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24 impl AsRef<libpam_sys::pam_handle> for LibPamHandle {
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25 fn as_ref(&self) -> &libpam_sys::pam_handle {
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26 unsafe { self.0.as_ref() }
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27 }
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28 }
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29
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30 impl AsMut<libpam_sys::pam_handle> for LibPamHandle {
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31 fn as_mut(&mut self) -> &mut libpam_sys::pam_handle {
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32 unsafe { self.0.as_mut() }
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33 }
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34 }
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35
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36 /// An owned PAM handle.
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37 pub struct OwnedLibPamHandle<'a> {
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38 /// The handle itself.
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39 handle: LibPamHandle,
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40 /// The last return value from the handle.
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41 last_return: Cell<Result<()>>,
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42 /// If set, the Conversation that this PAM handle owns.
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43 ///
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44 /// We have to hold on to this because the PAM specification doesn't
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45 /// actually say what the PAM library should do with a passed-in
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46 /// conversation. Linux-PAM copies the contents of the `pam_conv` struct
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47 /// that you pass in to `pam_start`, but OpenPAM uses the pointer itself,
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48 /// so you have to keep it in one place.
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49 conversation: Option<Box<LibPamConversation<'a>>>,
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50 }
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51
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52 #[derive(Debug, PartialEq)]
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53 pub struct HandleBuilder {
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54 service_name: String,
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55 username: Option<String>,
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56 }
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57
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58 impl HandleBuilder {
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59 /// Updates the service name.
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60 pub fn service_name(mut self, service_name: String) -> Self {
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61 self.service_name = service_name;
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62 self
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63 }
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64 /// Sets the username. Setting this will avoid the need for an extra
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65 /// round trip through the conversation and may otherwise improve
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66 /// the login experience.
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67 pub fn username(mut self, username: String) -> Self {
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68 self.username = Some(username);
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69 self
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70 }
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71 /// Builds a PAM handle and starts the transaction.
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72 pub fn build(self, conv: &impl Conversation) -> Result<OwnedLibPamHandle> {
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73 OwnedLibPamHandle::start(self.service_name, self.username, conv)
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74 }
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75 }
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76
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77 impl OwnedLibPamHandle<'_> {
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78 /// Creates a builder to start a PAM transaction for the given service.
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79 ///
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80 /// The service name is what controls the steps and checks PAM goes through
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81 /// when authenticating a user. This corresponds to the configuration file
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82 /// named <code>/etc/pam.d/<var>service_name</var></code>.
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83 ///
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84 /// # References
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85 #[doc = linklist!(pam_start: adg, _std)]
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86 ///
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87 #[doc = stdlinks!(3 pam_start)]
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88 #[doc = guide!(adg: "adg-interface-by-app-expected.html#adg-pam_start")]
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89 pub fn build_with_service(service_name: String) -> HandleBuilder {
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90 HandleBuilder {
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91 service_name,
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92 username: None,
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93 }
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94 }
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95
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96 fn start(
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97 service_name: String,
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98 username: Option<String>,
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99 conversation: &impl Conversation,
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100 ) -> Result<Self> {
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101 let conv = Box::new(LibPamConversation::wrap(conversation));
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102 let service_cstr = CString::new(service_name).map_err(|_| ErrorCode::ConversationError)?;
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103 let username_cstr = memory::prompt_ptr(memory::option_cstr(username.as_deref())?.as_ref());
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104
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105 let mut handle: *mut libpam_sys::pam_handle = ptr::null_mut();
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106 // SAFETY: We've set everything up properly to call `pam_start`.
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107 // The returned value will be a valid pointer provided the result is OK.
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108 let result = unsafe {
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109 libpam_sys::pam_start(
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110 service_cstr.as_ptr(),
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111 username_cstr,
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112 (conv.as_ref() as *const LibPamConversation)
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113 .cast_mut()
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114 .cast(),
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115 &mut handle,
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116 )
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117 };
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118 ErrorCode::result_from(result)?;
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119 let handle = NonNull::new(handle).ok_or(ErrorCode::BufferError)?;
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120 Ok(Self {
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121 handle: LibPamHandle(handle),
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122 last_return: Cell::new(Ok(())),
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123 conversation: Some(conv),
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124 })
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125 }
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126 }
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127
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128 impl PamHandleApplication for OwnedLibPamHandle<'_> {
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129 fn authenticate(&mut self, flags: Flags) -> Result<()> {
130
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130 let ret =
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131 unsafe { libpam_sys::pam_authenticate(self.handle.as_mut(), flags.bits() as c_int) };
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132 let result = ErrorCode::result_from(ret);
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133 self.last_return.set(result);
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134 result
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135 }
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136
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137 fn account_management(&mut self, flags: Flags) -> Result<()> {
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138 let ret = unsafe { libpam_sys::pam_acct_mgmt(self.handle.as_mut(), flags.bits() as c_int) };
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139 let result = ErrorCode::result_from(ret);
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140 self.last_return.set(result);
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141 result
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142 }
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143
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144 fn change_authtok(&mut self, flags: Flags) -> Result<()> {
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145 let ret = unsafe { libpam_sys::pam_chauthtok(self.handle.as_mut(), flags.bits() as c_int) };
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146 let result = ErrorCode::result_from(ret);
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147 self.last_return.set(result);
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148 result
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149 }
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150 }
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151
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152 // TODO: pam_authenticate - app
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153 // pam_setcred - app
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154 // pam_acct_mgmt - app
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155 // pam_chauthtok - app
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156 // pam_open_session - app
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157 // pam_close_session - app
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158 // pam_putenv - shared
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159 // pam_getenv - shared
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160 // pam_getenvlist - shared
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161
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162 impl Drop for OwnedLibPamHandle<'_> {
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163 /// Closes the PAM session on an owned PAM handle.
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164 ///
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165 /// This internally calls `pam_end` with the appropriate error code.
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166 ///
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167 /// # References
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168 #[doc = linklist!(pam_end: adg, _std)]
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169 ///
116
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170 #[doc = guide!(adg: "adg-interface-by-app-expected.html#adg-pam_end")]
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171 #[doc = stdlinks!(3 pam_end)]
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172 fn drop(&mut self) {
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173 unsafe {
130
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174 libpam_sys::pam_end(
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175 self.handle.as_mut(),
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176 ErrorCode::result_to_c(self.last_return.get()),
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177 );
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178 }
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179 }
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180 }
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181
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182 /// Macro to implement getting/setting a CStr-based item.
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183 macro_rules! cstr_item {
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184 (get = $getter:ident, item = $item_type:path) => {
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185 fn $getter(&self) -> Result<Option<String>> {
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186 unsafe { self.get_cstr_item($item_type) }
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187 }
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188 };
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189 (set = $setter:ident, item = $item_type:path) => {
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190 fn $setter(&mut self, value: Option<&str>) -> Result<()> {
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191 unsafe { self.set_cstr_item($item_type, value) }
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192 }
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193 };
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194 }
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195
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196 impl PamShared for LibPamHandle {
130
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197 #[cfg(any())]
116
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198 fn log(&self, level: Level, loc: Location<'_>, entry: &str) {
92
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199 let entry = match CString::new(entry).or_else(|_| CString::new(dbg!(entry))) {
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200 Ok(cstr) => cstr,
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201 _ => return,
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202 };
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203 #[cfg(pam_impl = "linux-pam")]
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204 {
116
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205 _ = loc;
92
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206 // SAFETY: We're calling this function with a known value.
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207 unsafe {
130
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208 libpam_sys::pam_syslog(self, level as c_int, "%s\0".as_ptr().cast(), entry.as_ptr())
92
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209 }
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210 }
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211 #[cfg(pam_impl = "openpam")]
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212 {
116
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213 let func = CString::new(loc.function).unwrap_or(CString::default());
92
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214 // SAFETY: We're calling this function with a known value.
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215 unsafe {
130
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216 libpam_sys::_openpam_log(
118
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diff changeset
217 level as c_int,
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218 func.as_ptr(),
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219 "%s\0".as_ptr().cast(),
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220 entry.as_ptr(),
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221 )
92
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222 }
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223 }
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224 }
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225
130
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226 fn log(&self, _level: Level, _loc: Location<'_>, _entry: &str) {}
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227
95
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228 fn username(&mut self, prompt: Option<&str>) -> Result<String> {
73
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229 let prompt = memory::option_cstr(prompt)?;
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230 let mut output: *const c_char = ptr::null();
80
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diff changeset
231 let ret = unsafe {
130
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diff changeset
232 libpam_sys::pam_get_user(
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diff changeset
233 self.as_mut(),
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diff changeset
234 &mut output,
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235 memory::prompt_ptr(prompt.as_ref()),
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diff changeset
236 )
80
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diff changeset
237 };
73
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238 ErrorCode::result_from(ret)?;
95
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diff changeset
239 unsafe { memory::copy_pam_string(output) }
73
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240 .transpose()
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241 .unwrap_or(Err(ErrorCode::ConversationError))
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242 }
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243
98
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244 fn environ(&self) -> impl EnvironMap {
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245 LibPamEnviron::new(self)
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246 }
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247
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248 fn environ_mut(&mut self) -> impl EnvironMapMut {
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249 LibPamEnvironMut::new(self)
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250 }
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251
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252 cstr_item!(get = user_item, item = ItemType::User);
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253 cstr_item!(set = set_user_item, item = ItemType::User);
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254 cstr_item!(get = service, item = ItemType::Service);
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255 cstr_item!(set = set_service, item = ItemType::Service);
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256 cstr_item!(get = user_prompt, item = ItemType::UserPrompt);
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257 cstr_item!(set = set_user_prompt, item = ItemType::UserPrompt);
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258 cstr_item!(get = tty_name, item = ItemType::Tty);
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259 cstr_item!(set = set_tty_name, item = ItemType::Tty);
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260 cstr_item!(get = remote_user, item = ItemType::RemoteUser);
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261 cstr_item!(set = set_remote_user, item = ItemType::RemoteUser);
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262 cstr_item!(get = remote_host, item = ItemType::RemoteHost);
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263 cstr_item!(set = set_remote_host, item = ItemType::RemoteHost);
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264 cstr_item!(set = set_authtok_item, item = ItemType::AuthTok);
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265 cstr_item!(set = set_old_authtok_item, item = ItemType::OldAuthTok);
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266 }
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267
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268 impl Conversation for LibPamHandle {
130
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269 fn communicate(&self, messages: &[Exchange]) {
77
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diff changeset
270 match self.conversation_item() {
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271 Ok(conv) => conv.communicate(messages),
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diff changeset
272 Err(e) => {
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diff changeset
273 for msg in messages {
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diff changeset
274 msg.set_error(e)
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275 }
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parents: 75
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276 }
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parents: 75
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277 }
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278 }
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279 }
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280
80
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diff changeset
281 impl PamHandleModule for LibPamHandle {
130
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Paul Fisher <paul@pfish.zone>
parents: 118
diff changeset
282 #[cfg_pam_impl(any("LinuxPam", "OpenPam"))]
95
51c9d7e8261a Return owned strings rather than borrowed strings.
Paul Fisher <paul@pfish.zone>
parents: 92
diff changeset
283 fn authtok(&mut self, prompt: Option<&str>) -> Result<String> {
73
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Paul Fisher <paul@pfish.zone>
parents:
diff changeset
284 let prompt = memory::option_cstr(prompt)?;
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Paul Fisher <paul@pfish.zone>
parents:
diff changeset
285 let mut output: *const c_char = ptr::null_mut();
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Paul Fisher <paul@pfish.zone>
parents:
diff changeset
286 // SAFETY: We're calling this with known-good values.
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Paul Fisher <paul@pfish.zone>
parents:
diff changeset
287 let res = unsafe {
130
80c07e5ab22f Transfer over (almost) completely to using libpam-sys.
Paul Fisher <paul@pfish.zone>
parents: 118
diff changeset
288 libpam_sys::pam_get_authtok(
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Paul Fisher <paul@pfish.zone>
parents: 118
diff changeset
289 self.as_mut(),
73
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Paul Fisher <paul@pfish.zone>
parents:
diff changeset
290 ItemType::AuthTok.into(),
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
291 &mut output,
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Paul Fisher <paul@pfish.zone>
parents:
diff changeset
292 memory::prompt_ptr(prompt.as_ref()),
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
293 )
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
294 };
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
295 ErrorCode::result_from(res)?;
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Paul Fisher <paul@pfish.zone>
parents:
diff changeset
296 // SAFETY: We got this string from PAM.
95
51c9d7e8261a Return owned strings rather than borrowed strings.
Paul Fisher <paul@pfish.zone>
parents: 92
diff changeset
297 unsafe { memory::copy_pam_string(output) }
73
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Paul Fisher <paul@pfish.zone>
parents:
diff changeset
298 .transpose()
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Paul Fisher <paul@pfish.zone>
parents:
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299 .unwrap_or(Err(ErrorCode::ConversationError))
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Paul Fisher <paul@pfish.zone>
parents:
diff changeset
300 }
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Paul Fisher <paul@pfish.zone>
parents:
diff changeset
301
130
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Paul Fisher <paul@pfish.zone>
parents: 118
diff changeset
302 #[cfg_pam_impl(not(any("LinuxPam", "OpenPam")))]
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Paul Fisher <paul@pfish.zone>
parents: 118
diff changeset
303 fn authtok(&mut self, prompt: Option<&str>) -> Result<String> {
80c07e5ab22f Transfer over (almost) completely to using libpam-sys.
Paul Fisher <paul@pfish.zone>
parents: 118
diff changeset
304 Err(ErrorCode::ConversationError)
80c07e5ab22f Transfer over (almost) completely to using libpam-sys.
Paul Fisher <paul@pfish.zone>
parents: 118
diff changeset
305 }
80c07e5ab22f Transfer over (almost) completely to using libpam-sys.
Paul Fisher <paul@pfish.zone>
parents: 118
diff changeset
306
73
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Paul Fisher <paul@pfish.zone>
parents:
diff changeset
307 cstr_item!(get = authtok_item, item = ItemType::AuthTok);
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
308 cstr_item!(get = old_authtok_item, item = ItemType::OldAuthTok);
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Paul Fisher <paul@pfish.zone>
parents:
diff changeset
309 }
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Paul Fisher <paul@pfish.zone>
parents:
diff changeset
310
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Paul Fisher <paul@pfish.zone>
parents:
diff changeset
311 /// Function called at the end of a PAM session that is called to clean up
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Paul Fisher <paul@pfish.zone>
parents:
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312 /// a value previously provided to PAM in a `pam_set_data` call.
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Paul Fisher <paul@pfish.zone>
parents:
diff changeset
313 ///
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Paul Fisher <paul@pfish.zone>
parents:
diff changeset
314 /// You should never call this yourself.
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Paul Fisher <paul@pfish.zone>
parents:
diff changeset
315 extern "C" fn set_data_cleanup<T>(_: *const libc::c_void, c_data: *mut libc::c_void, _: c_int) {
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Paul Fisher <paul@pfish.zone>
parents:
diff changeset
316 unsafe {
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Paul Fisher <paul@pfish.zone>
parents:
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317 let _data: Box<T> = Box::from_raw(c_data.cast());
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents:
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318 }
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents:
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319 }
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
320
80
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
321 impl LibPamHandle {
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Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
322 /// Gets a C string item.
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Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
323 ///
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Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
324 /// # Safety
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
325 ///
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
326 /// You better be requesting an item which is a C string.
95
51c9d7e8261a Return owned strings rather than borrowed strings.
Paul Fisher <paul@pfish.zone>
parents: 92
diff changeset
327 unsafe fn get_cstr_item(&self, item_type: ItemType) -> Result<Option<String>> {
80
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
328 let mut output = ptr::null();
130
80c07e5ab22f Transfer over (almost) completely to using libpam-sys.
Paul Fisher <paul@pfish.zone>
parents: 118
diff changeset
329 let ret =
80c07e5ab22f Transfer over (almost) completely to using libpam-sys.
Paul Fisher <paul@pfish.zone>
parents: 118
diff changeset
330 unsafe { libpam_sys::pam_get_item(self.as_ref(), item_type as c_int, &mut output) };
80
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
331 ErrorCode::result_from(ret)?;
95
51c9d7e8261a Return owned strings rather than borrowed strings.
Paul Fisher <paul@pfish.zone>
parents: 92
diff changeset
332 memory::copy_pam_string(output.cast())
80
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
333 }
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
334
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
335 /// Sets a C string item.
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
336 ///
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
337 /// # Safety
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
338 ///
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
339 /// You better be setting an item which is a C string.
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
340 unsafe fn set_cstr_item(&mut self, item_type: ItemType, data: Option<&str>) -> Result<()> {
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
341 let data_str = memory::option_cstr(data)?;
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
342 let ret = unsafe {
130
80c07e5ab22f Transfer over (almost) completely to using libpam-sys.
Paul Fisher <paul@pfish.zone>
parents: 118
diff changeset
343 libpam_sys::pam_set_item(
80c07e5ab22f Transfer over (almost) completely to using libpam-sys.
Paul Fisher <paul@pfish.zone>
parents: 118
diff changeset
344 self.as_mut(),
80
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
345 item_type as c_int,
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
346 memory::prompt_ptr(data_str.as_ref()).cast(),
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
347 )
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
348 };
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
349 ErrorCode::result_from(ret)
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
350 }
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
351
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
352 /// Gets the `PAM_CONV` item from the handle.
96
f3e260f9ddcb Make conversation trait use immutable references.
Paul Fisher <paul@pfish.zone>
parents: 95
diff changeset
353 fn conversation_item(&self) -> Result<&mut LibPamConversation<'_>> {
80
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
354 let output: *mut LibPamConversation = ptr::null_mut();
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
355 let result = unsafe {
130
80c07e5ab22f Transfer over (almost) completely to using libpam-sys.
Paul Fisher <paul@pfish.zone>
parents: 118
diff changeset
356 libpam_sys::pam_get_item(
80c07e5ab22f Transfer over (almost) completely to using libpam-sys.
Paul Fisher <paul@pfish.zone>
parents: 118
diff changeset
357 self.as_ref(),
80
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
358 ItemType::Conversation.into(),
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
359 &mut output.cast_const().cast(),
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
360 )
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
361 };
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
362 ErrorCode::result_from(result)?;
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
363 // SAFETY: We got this result from PAM, and we're checking if it's null.
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
364 unsafe { output.as_mut() }.ok_or(ErrorCode::ConversationError)
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
365 }
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
366 }
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
367
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
368 macro_rules! delegate {
98
b87100c5eed4 Start on environment variables, and make pointers nicer.
Paul Fisher <paul@pfish.zone>
parents: 97
diff changeset
369 // First have the kind that save the result after delegation.
80
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
370 (fn $meth:ident(&self $(, $param:ident: $typ:ty)*) -> Result<$ret:ty>) => {
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
371 fn $meth(&self $(, $param: $typ)*) -> Result<$ret> {
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
372 let result = self.handle.$meth($($param),*);
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
373 self.last_return.set(split(&result));
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
374 result
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
375 }
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
376 };
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
377 (fn $meth:ident(&mut self $(, $param:ident: $typ:ty)*) -> Result<$ret:ty>) => {
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
378 fn $meth(&mut self $(, $param: $typ)*) -> Result<$ret> {
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
379 let result = self.handle.$meth($($param),*);
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
380 self.last_return.set(split(&result));
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
381 result
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
382 }
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
383 };
98
b87100c5eed4 Start on environment variables, and make pointers nicer.
Paul Fisher <paul@pfish.zone>
parents: 97
diff changeset
384 // Then have the kind that are just raw delegates
b87100c5eed4 Start on environment variables, and make pointers nicer.
Paul Fisher <paul@pfish.zone>
parents: 97
diff changeset
385 (fn $meth:ident(&self $(, $param:ident: $typ:ty)*) -> $ret:ty) => {
b87100c5eed4 Start on environment variables, and make pointers nicer.
Paul Fisher <paul@pfish.zone>
parents: 97
diff changeset
386 fn $meth(&self $(, $param: $typ)*) -> $ret {
b87100c5eed4 Start on environment variables, and make pointers nicer.
Paul Fisher <paul@pfish.zone>
parents: 97
diff changeset
387 self.handle.$meth($($param),*)
b87100c5eed4 Start on environment variables, and make pointers nicer.
Paul Fisher <paul@pfish.zone>
parents: 97
diff changeset
388 }
b87100c5eed4 Start on environment variables, and make pointers nicer.
Paul Fisher <paul@pfish.zone>
parents: 97
diff changeset
389 };
b87100c5eed4 Start on environment variables, and make pointers nicer.
Paul Fisher <paul@pfish.zone>
parents: 97
diff changeset
390 (fn $meth:ident(&mut self $(, $param:ident: $typ:ty)*) -> $ret:ty) => {
b87100c5eed4 Start on environment variables, and make pointers nicer.
Paul Fisher <paul@pfish.zone>
parents: 97
diff changeset
391 fn $meth(&mut self $(, $param: $typ)*) -> $ret {
b87100c5eed4 Start on environment variables, and make pointers nicer.
Paul Fisher <paul@pfish.zone>
parents: 97
diff changeset
392 self.handle.$meth($($param),*)
b87100c5eed4 Start on environment variables, and make pointers nicer.
Paul Fisher <paul@pfish.zone>
parents: 97
diff changeset
393 }
b87100c5eed4 Start on environment variables, and make pointers nicer.
Paul Fisher <paul@pfish.zone>
parents: 97
diff changeset
394 };
b87100c5eed4 Start on environment variables, and make pointers nicer.
Paul Fisher <paul@pfish.zone>
parents: 97
diff changeset
395 // Then have item getters / setters
80
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
396 (get = $get:ident$(, set = $set:ident)?) => {
95
51c9d7e8261a Return owned strings rather than borrowed strings.
Paul Fisher <paul@pfish.zone>
parents: 92
diff changeset
397 delegate!(fn $get(&self) -> Result<Option<String>>);
80
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
398 $(delegate!(set = $set);)?
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
399 };
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
400 (set = $set:ident) => {
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
401 delegate!(fn $set(&mut self, value: Option<&str>) -> Result<()>);
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
402 };
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
403 }
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
404
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
405 fn split<T>(result: &Result<T>) -> Result<()> {
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
406 result.as_ref().map(drop).map_err(|&e| e)
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
407 }
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
408
90
f6186e41399b Miscellaneous fixes and cleanup:
Paul Fisher <paul@pfish.zone>
parents: 80
diff changeset
409 impl PamShared for OwnedLibPamHandle<'_> {
116
a12706e42c9d Logging, macros, and building:
Paul Fisher <paul@pfish.zone>
parents: 105
diff changeset
410 delegate!(fn log(&self, level: Level, location: Location<'_>, entry: &str) -> ());
98
b87100c5eed4 Start on environment variables, and make pointers nicer.
Paul Fisher <paul@pfish.zone>
parents: 97
diff changeset
411 delegate!(fn environ(&self) -> impl EnvironMap);
b87100c5eed4 Start on environment variables, and make pointers nicer.
Paul Fisher <paul@pfish.zone>
parents: 97
diff changeset
412 delegate!(fn environ_mut(&mut self) -> impl EnvironMapMut);
95
51c9d7e8261a Return owned strings rather than borrowed strings.
Paul Fisher <paul@pfish.zone>
parents: 92
diff changeset
413 delegate!(fn username(&mut self, prompt: Option<&str>) -> Result<String>);
80
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
414 delegate!(get = user_item, set = set_user_item);
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
415 delegate!(get = service, set = set_service);
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
416 delegate!(get = user_prompt, set = set_user_prompt);
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
417 delegate!(get = tty_name, set = set_tty_name);
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
418 delegate!(get = remote_user, set = set_remote_user);
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
419 delegate!(get = remote_host, set = set_remote_host);
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420 delegate!(set = set_authtok_item);
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421 delegate!(set = set_old_authtok_item);
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422 }
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423
73
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Paul Fisher <paul@pfish.zone>
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424 /// Identifies what is being gotten or set with `pam_get_item`
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Paul Fisher <paul@pfish.zone>
parents:
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425 /// or `pam_set_item`.
80
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426 #[derive(TryFromPrimitive, IntoPrimitive)]
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Paul Fisher <paul@pfish.zone>
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427 #[repr(i32)]
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Paul Fisher <paul@pfish.zone>
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428 #[non_exhaustive] // because C could give us anything!
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Paul Fisher <paul@pfish.zone>
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429 pub enum ItemType {
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Paul Fisher <paul@pfish.zone>
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430 /// The PAM service name.
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Paul Fisher <paul@pfish.zone>
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431 Service = 1,
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Paul Fisher <paul@pfish.zone>
parents:
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432 /// The user's login name.
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Paul Fisher <paul@pfish.zone>
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433 User = 2,
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Paul Fisher <paul@pfish.zone>
parents:
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434 /// The TTY name.
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Paul Fisher <paul@pfish.zone>
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435 Tty = 3,
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Paul Fisher <paul@pfish.zone>
parents:
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436 /// The remote host (if applicable).
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Paul Fisher <paul@pfish.zone>
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437 RemoteHost = 4,
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Paul Fisher <paul@pfish.zone>
parents:
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438 /// The conversation struct (not a CStr-based item).
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Paul Fisher <paul@pfish.zone>
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439 Conversation = 5,
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Paul Fisher <paul@pfish.zone>
parents:
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440 /// The authentication token (password).
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Paul Fisher <paul@pfish.zone>
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441 AuthTok = 6,
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Paul Fisher <paul@pfish.zone>
parents:
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442 /// The old authentication token (when changing passwords).
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Paul Fisher <paul@pfish.zone>
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443 OldAuthTok = 7,
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Paul Fisher <paul@pfish.zone>
parents:
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444 /// The remote user's name.
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Paul Fisher <paul@pfish.zone>
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445 RemoteUser = 8,
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Paul Fisher <paul@pfish.zone>
parents:
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446 /// The prompt shown when requesting a username.
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Paul Fisher <paul@pfish.zone>
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447 UserPrompt = 9,
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Paul Fisher <paul@pfish.zone>
parents:
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448 /// App-supplied function to override failure delays.
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Paul Fisher <paul@pfish.zone>
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449 FailDelay = 10,
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Paul Fisher <paul@pfish.zone>
parents:
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450 /// X display name.
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Paul Fisher <paul@pfish.zone>
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451 XDisplay = 11,
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Paul Fisher <paul@pfish.zone>
parents:
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452 /// X server authentication data.
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Paul Fisher <paul@pfish.zone>
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453 XAuthData = 12,
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Paul Fisher <paul@pfish.zone>
parents:
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454 /// The type of `pam_get_authtok`.
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Paul Fisher <paul@pfish.zone>
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455 AuthTokType = 13,
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Paul Fisher <paul@pfish.zone>
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456 }