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annotate src/libpam/handle.rs @ 136:efbc235f01d3

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Separate libpam-sys-helpers from libpam-sys. This separates the parts of libpam-sys that don't need linking against libpam from the parts that do need to link against libpam.
author Paul Fisher <paul@pfish.zone>
date Thu, 03 Jul 2025 14:28:04 -0400
parents 6c1e1bdb4164
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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 std::ptr;
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18 use std::ptr::NonNull;
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19
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20 /// Owner for a PAM handle.
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21 pub struct LibPamHandle(pub NonNull<libpam_sys::pam_handle>);
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22
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23 impl AsRef<libpam_sys::pam_handle> for LibPamHandle {
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24 fn as_ref(&self) -> &libpam_sys::pam_handle {
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25 unsafe { self.0.as_ref() }
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26 }
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27 }
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28
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29 impl AsMut<libpam_sys::pam_handle> for LibPamHandle {
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30 fn as_mut(&mut self) -> &mut libpam_sys::pam_handle {
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31 unsafe { self.0.as_mut() }
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32 }
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33 }
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34
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35 /// An owned PAM handle.
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36 pub struct OwnedLibPamHandle<'a> {
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37 /// The handle itself.
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38 handle: LibPamHandle,
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39 /// The last return value from the handle.
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40 last_return: Cell<Result<()>>,
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41 /// If set, the Conversation that this PAM handle owns.
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42 ///
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43 /// We have to hold on to this because the PAM specification doesn't
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44 /// actually say what the PAM library should do with a passed-in
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45 /// conversation. Linux-PAM copies the contents of the `pam_conv` struct
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46 /// that you pass in to `pam_start`, but OpenPAM uses the pointer itself,
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47 /// so you have to keep it in one place.
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48 conversation: Option<Box<LibPamConversation<'a>>>,
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49 }
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50
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51 #[derive(Debug, PartialEq)]
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52 pub struct HandleBuilder {
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53 service_name: String,
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54 username: Option<String>,
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55 }
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56
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57 impl HandleBuilder {
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58 /// Updates the service name.
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59 pub fn service_name(mut self, service_name: String) -> Self {
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60 self.service_name = service_name;
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61 self
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62 }
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63 /// Sets the username. Setting this will avoid the need for an extra
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64 /// round trip through the conversation and may otherwise improve
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65 /// the login experience.
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66 pub fn username(mut self, username: String) -> Self {
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67 self.username = Some(username);
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68 self
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69 }
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70 /// Builds a PAM handle and starts the transaction.
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71 pub fn build(self, conv: &impl Conversation) -> Result<OwnedLibPamHandle> {
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72 OwnedLibPamHandle::start(self.service_name, self.username, conv)
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73 }
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74 }
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75
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76 impl OwnedLibPamHandle<'_> {
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77 /// Creates a builder to start a PAM transaction for the given service.
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78 ///
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79 /// The service name is what controls the steps and checks PAM goes through
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80 /// when authenticating a user. This corresponds to the configuration file
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81 /// named <code>/etc/pam.d/<var>service_name</var></code>.
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82 ///
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83 /// # References
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84 #[doc = linklist!(pam_start: adg, _std)]
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85 ///
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86 #[doc = stdlinks!(3 pam_start)]
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87 #[doc = guide!(adg: "adg-interface-by-app-expected.html#adg-pam_start")]
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88 pub fn build_with_service(service_name: String) -> HandleBuilder {
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89 HandleBuilder {
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90 service_name,
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91 username: None,
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92 }
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93 }
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94
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95 fn start(
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96 service_name: String,
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97 username: Option<String>,
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98 conversation: &impl Conversation,
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99 ) -> Result<Self> {
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100 let conv = Box::new(LibPamConversation::wrap(conversation));
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101 let service_cstr = CString::new(service_name).map_err(|_| ErrorCode::ConversationError)?;
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102 let username_cstr = memory::prompt_ptr(memory::option_cstr(username.as_deref())?.as_ref());
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103
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104 let mut handle: *mut libpam_sys::pam_handle = ptr::null_mut();
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105 // SAFETY: We've set everything up properly to call `pam_start`.
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106 // The returned value will be a valid pointer provided the result is OK.
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107 let result = unsafe {
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108 libpam_sys::pam_start(
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109 service_cstr.as_ptr(),
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110 username_cstr,
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111 (conv.as_ref() as *const LibPamConversation)
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112 .cast_mut()
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113 .cast(),
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114 &mut handle,
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115 )
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116 };
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117 ErrorCode::result_from(result)?;
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118 let handle = NonNull::new(handle).ok_or(ErrorCode::BufferError)?;
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119 Ok(Self {
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120 handle: LibPamHandle(handle),
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121 last_return: Cell::new(Ok(())),
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122 conversation: Some(conv),
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123 })
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124 }
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125 }
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126
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127 impl PamHandleApplication for OwnedLibPamHandle<'_> {
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128 fn authenticate(&mut self, flags: Flags) -> Result<()> {
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129 let ret =
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130 unsafe { libpam_sys::pam_authenticate(self.handle.as_mut(), flags.bits() as c_int) };
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131 let result = ErrorCode::result_from(ret);
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132 self.last_return.set(result);
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133 result
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134 }
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135
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136 fn account_management(&mut self, flags: Flags) -> Result<()> {
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137 let ret = unsafe { libpam_sys::pam_acct_mgmt(self.handle.as_mut(), flags.bits() as c_int) };
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138 let result = ErrorCode::result_from(ret);
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139 self.last_return.set(result);
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140 result
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141 }
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142
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143 fn change_authtok(&mut self, flags: Flags) -> Result<()> {
130
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144 let ret = unsafe { libpam_sys::pam_chauthtok(self.handle.as_mut(), flags.bits() as c_int) };
97
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145 let result = ErrorCode::result_from(ret);
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146 self.last_return.set(result);
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147 result
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148 }
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149 }
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150
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151 // TODO: pam_authenticate - app
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152 // pam_setcred - app
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153 // pam_acct_mgmt - app
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154 // pam_chauthtok - app
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155 // pam_open_session - app
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156 // pam_close_session - app
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157 // pam_putenv - shared
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158 // pam_getenv - shared
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159 // pam_getenvlist - shared
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160
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161 impl Drop for OwnedLibPamHandle<'_> {
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162 /// Closes the PAM session on an owned PAM handle.
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163 ///
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164 /// This internally calls `pam_end` with the appropriate error code.
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165 ///
103
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166 /// # References
116
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167 #[doc = linklist!(pam_end: adg, _std)]
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168 ///
116
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169 #[doc = guide!(adg: "adg-interface-by-app-expected.html#adg-pam_end")]
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170 #[doc = stdlinks!(3 pam_end)]
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171 fn drop(&mut self) {
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172 unsafe {
130
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173 libpam_sys::pam_end(
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174 self.handle.as_mut(),
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175 ErrorCode::result_to_c(self.last_return.get()),
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176 );
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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 /// Macro to implement getting/setting a CStr-based item.
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182 macro_rules! cstr_item {
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183 (get = $getter:ident, item = $item_type:path) => {
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184 fn $getter(&self) -> Result<Option<String>> {
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185 unsafe { self.get_cstr_item($item_type) }
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186 }
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187 };
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188 (set = $setter:ident, item = $item_type:path) => {
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189 fn $setter(&mut self, value: Option<&str>) -> Result<()> {
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190 unsafe { self.set_cstr_item($item_type, value) }
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191 }
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192 };
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193 }
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194
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195 impl PamShared for LibPamHandle {
130
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196 #[cfg(any())]
116
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197 fn log(&self, level: Level, loc: Location<'_>, entry: &str) {
92
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198 let entry = match CString::new(entry).or_else(|_| CString::new(dbg!(entry))) {
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199 Ok(cstr) => cstr,
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200 _ => return,
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201 };
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202 #[cfg(pam_impl = "linux-pam")]
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203 {
116
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204 _ = loc;
92
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205 // SAFETY: We're calling this function with a known value.
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206 unsafe {
130
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207 libpam_sys::pam_syslog(self, level as c_int, "%s\0".as_ptr().cast(), entry.as_ptr())
92
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208 }
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209 }
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210 #[cfg(pam_impl = "openpam")]
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211 {
116
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212 let func = CString::new(loc.function).unwrap_or(CString::default());
92
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213 // SAFETY: We're calling this function with a known value.
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214 unsafe {
130
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215 libpam_sys::_openpam_log(
118
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diff changeset
216 level as c_int,
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217 func.as_ptr(),
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218 "%s\0".as_ptr().cast(),
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diff changeset
219 entry.as_ptr(),
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220 )
92
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221 }
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222 }
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223 }
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224
130
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diff changeset
225 fn log(&self, _level: Level, _loc: Location<'_>, _entry: &str) {}
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226
95
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diff changeset
227 fn username(&mut self, prompt: Option<&str>) -> Result<String> {
73
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228 let prompt = memory::option_cstr(prompt)?;
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229 let mut output: *const c_char = ptr::null();
80
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diff changeset
230 let ret = unsafe {
130
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diff changeset
231 libpam_sys::pam_get_user(
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diff changeset
232 self.as_mut(),
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diff changeset
233 &mut output,
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diff changeset
234 memory::prompt_ptr(prompt.as_ref()),
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diff changeset
235 )
80
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diff changeset
236 };
73
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237 ErrorCode::result_from(ret)?;
95
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diff changeset
238 unsafe { memory::copy_pam_string(output) }
73
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239 .transpose()
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240 .unwrap_or(Err(ErrorCode::ConversationError))
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241 }
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242
98
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diff changeset
243 fn environ(&self) -> impl EnvironMap {
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244 LibPamEnviron::new(self)
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245 }
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246
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247 fn environ_mut(&mut self) -> impl EnvironMapMut {
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248 LibPamEnvironMut::new(self)
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249 }
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diff changeset
250
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251 cstr_item!(get = user_item, item = ItemType::User);
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252 cstr_item!(set = set_user_item, item = ItemType::User);
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253 cstr_item!(get = service, item = ItemType::Service);
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254 cstr_item!(set = set_service, item = ItemType::Service);
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255 cstr_item!(get = user_prompt, item = ItemType::UserPrompt);
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256 cstr_item!(set = set_user_prompt, item = ItemType::UserPrompt);
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257 cstr_item!(get = tty_name, item = ItemType::Tty);
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258 cstr_item!(set = set_tty_name, item = ItemType::Tty);
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259 cstr_item!(get = remote_user, item = ItemType::RemoteUser);
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260 cstr_item!(set = set_remote_user, item = ItemType::RemoteUser);
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261 cstr_item!(get = remote_host, item = ItemType::RemoteHost);
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262 cstr_item!(set = set_remote_host, item = ItemType::RemoteHost);
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263 cstr_item!(set = set_authtok_item, item = ItemType::AuthTok);
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264 cstr_item!(set = set_old_authtok_item, item = ItemType::OldAuthTok);
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265 }
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266
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267 impl Conversation for LibPamHandle {
130
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diff changeset
268 fn communicate(&self, messages: &[Exchange]) {
77
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diff changeset
269 match self.conversation_item() {
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270 Ok(conv) => conv.communicate(messages),
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diff changeset
271 Err(e) => {
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diff changeset
272 for msg in messages {
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diff changeset
273 msg.set_error(e)
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diff changeset
274 }
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parents: 75
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275 }
351bdc13005e Update the libpam module to work with the new structure.
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parents: 75
diff changeset
276 }
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277 }
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278 }
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279
80
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diff changeset
280 impl PamHandleModule for LibPamHandle {
134
6c1e1bdb4164 Use standard #[cfg] directives rather than custom proc macros.
Paul Fisher <paul@pfish.zone>
parents: 131
diff changeset
281 #[cfg(any(pam_impl = "LinuxPam", pam_impl = "OpenPam"))]
95
51c9d7e8261a Return owned strings rather than borrowed strings.
Paul Fisher <paul@pfish.zone>
parents: 92
diff changeset
282 fn authtok(&mut self, prompt: Option<&str>) -> Result<String> {
73
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Paul Fisher <paul@pfish.zone>
parents:
diff changeset
283 let prompt = memory::option_cstr(prompt)?;
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Paul Fisher <paul@pfish.zone>
parents:
diff changeset
284 let mut output: *const c_char = ptr::null_mut();
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Paul Fisher <paul@pfish.zone>
parents:
diff changeset
285 // SAFETY: We're calling this with known-good values.
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Paul Fisher <paul@pfish.zone>
parents:
diff changeset
286 let res = unsafe {
130
80c07e5ab22f Transfer over (almost) completely to using libpam-sys.
Paul Fisher <paul@pfish.zone>
parents: 118
diff changeset
287 libpam_sys::pam_get_authtok(
80c07e5ab22f Transfer over (almost) completely to using libpam-sys.
Paul Fisher <paul@pfish.zone>
parents: 118
diff changeset
288 self.as_mut(),
73
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Paul Fisher <paul@pfish.zone>
parents:
diff changeset
289 ItemType::AuthTok.into(),
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
290 &mut output,
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Paul Fisher <paul@pfish.zone>
parents:
diff changeset
291 memory::prompt_ptr(prompt.as_ref()),
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
292 )
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 ErrorCode::result_from(res)?;
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Paul Fisher <paul@pfish.zone>
parents:
diff changeset
295 // 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
296 unsafe { memory::copy_pam_string(output) }
73
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Paul Fisher <paul@pfish.zone>
parents:
diff changeset
297 .transpose()
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents:
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298 .unwrap_or(Err(ErrorCode::ConversationError))
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
299 }
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
300
134
6c1e1bdb4164 Use standard #[cfg] directives rather than custom proc macros.
Paul Fisher <paul@pfish.zone>
parents: 131
diff changeset
301 #[cfg(not(any(pam_impl = "LinuxPam", pam_impl = "OpenPam")))]
130
80c07e5ab22f Transfer over (almost) completely to using libpam-sys.
Paul Fisher <paul@pfish.zone>
parents: 118
diff changeset
302 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
303 Err(ErrorCode::ConversationError)
80c07e5ab22f Transfer over (almost) completely to using libpam-sys.
Paul Fisher <paul@pfish.zone>
parents: 118
diff changeset
304 }
80c07e5ab22f Transfer over (almost) completely to using libpam-sys.
Paul Fisher <paul@pfish.zone>
parents: 118
diff changeset
305
73
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
306 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
307 cstr_item!(get = old_authtok_item, item = ItemType::OldAuthTok);
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
308 }
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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 /// 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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311 /// a value previously provided to PAM in a `pam_set_data` call.
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Paul Fisher <paul@pfish.zone>
parents:
diff changeset
312 ///
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Paul Fisher <paul@pfish.zone>
parents:
diff changeset
313 /// You should never call this yourself.
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
314 extern "C" fn set_data_cleanup<T>(_: *const libc::c_void, c_data: *mut libc::c_void, _: c_int) {
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
315 unsafe {
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
316 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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317 }
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
318 }
ac6881304c78 Do conversations, along with way too much stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
319
80
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
320 impl LibPamHandle {
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Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
321 /// Gets a C string item.
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Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
322 ///
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
323 /// # Safety
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
324 ///
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
325 /// 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
326 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
327 let mut output = ptr::null();
130
80c07e5ab22f Transfer over (almost) completely to using libpam-sys.
Paul Fisher <paul@pfish.zone>
parents: 118
diff changeset
328 let ret =
80c07e5ab22f Transfer over (almost) completely to using libpam-sys.
Paul Fisher <paul@pfish.zone>
parents: 118
diff changeset
329 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
330 ErrorCode::result_from(ret)?;
95
51c9d7e8261a Return owned strings rather than borrowed strings.
Paul Fisher <paul@pfish.zone>
parents: 92
diff changeset
331 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
332 }
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 /// Sets a C string item.
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
335 ///
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
336 /// # Safety
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
337 ///
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
338 /// 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
339 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
340 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
341 let ret = unsafe {
130
80c07e5ab22f Transfer over (almost) completely to using libpam-sys.
Paul Fisher <paul@pfish.zone>
parents: 118
diff changeset
342 libpam_sys::pam_set_item(
80c07e5ab22f Transfer over (almost) completely to using libpam-sys.
Paul Fisher <paul@pfish.zone>
parents: 118
diff changeset
343 self.as_mut(),
80
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
344 item_type as c_int,
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
345 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
346 )
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 ErrorCode::result_from(ret)
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
349 }
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 /// 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
352 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
353 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
354 let result = unsafe {
130
80c07e5ab22f Transfer over (almost) completely to using libpam-sys.
Paul Fisher <paul@pfish.zone>
parents: 118
diff changeset
355 libpam_sys::pam_get_item(
80c07e5ab22f Transfer over (almost) completely to using libpam-sys.
Paul Fisher <paul@pfish.zone>
parents: 118
diff changeset
356 self.as_ref(),
80
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
357 ItemType::Conversation.into(),
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
358 &mut output.cast_const().cast(),
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
359 )
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 ErrorCode::result_from(result)?;
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
362 // 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
363 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
364 }
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 macro_rules! delegate {
98
b87100c5eed4 Start on environment variables, and make pointers nicer.
Paul Fisher <paul@pfish.zone>
parents: 97
diff changeset
368 // 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
369 (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
370 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
371 let result = self.handle.$meth($($param),*);
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
372 self.last_return.set(split(&result));
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
373 result
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
374 }
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 (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
377 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
378 let result = self.handle.$meth($($param),*);
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
379 self.last_return.set(split(&result));
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
380 result
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
381 }
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
382 };
98
b87100c5eed4 Start on environment variables, and make pointers nicer.
Paul Fisher <paul@pfish.zone>
parents: 97
diff changeset
383 // 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
384 (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
385 fn $meth(&self $(, $param: $typ)*) -> $ret {
b87100c5eed4 Start on environment variables, and make pointers nicer.
Paul Fisher <paul@pfish.zone>
parents: 97
diff changeset
386 self.handle.$meth($($param),*)
b87100c5eed4 Start on environment variables, and make pointers nicer.
Paul Fisher <paul@pfish.zone>
parents: 97
diff changeset
387 }
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 (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
390 fn $meth(&mut self $(, $param: $typ)*) -> $ret {
b87100c5eed4 Start on environment variables, and make pointers nicer.
Paul Fisher <paul@pfish.zone>
parents: 97
diff changeset
391 self.handle.$meth($($param),*)
b87100c5eed4 Start on environment variables, and make pointers nicer.
Paul Fisher <paul@pfish.zone>
parents: 97
diff changeset
392 }
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 // Then have item getters / setters
80
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
395 (get = $get:ident$(, set = $set:ident)?) => {
95
51c9d7e8261a Return owned strings rather than borrowed strings.
Paul Fisher <paul@pfish.zone>
parents: 92
diff changeset
396 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
397 $(delegate!(set = $set);)?
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
398 };
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
399 (set = $set:ident) => {
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
400 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
401 };
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 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
405 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
406 }
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
407
90
f6186e41399b Miscellaneous fixes and cleanup:
Paul Fisher <paul@pfish.zone>
parents: 80
diff changeset
408 impl PamShared for OwnedLibPamHandle<'_> {
116
a12706e42c9d Logging, macros, and building:
Paul Fisher <paul@pfish.zone>
parents: 105
diff changeset
409 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
410 delegate!(fn environ(&self) -> impl EnvironMap);
b87100c5eed4 Start on environment variables, and make pointers nicer.
Paul Fisher <paul@pfish.zone>
parents: 97
diff changeset
411 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
412 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
413 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
414 delegate!(get = service, set = set_service);
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
415 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
416 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
417 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
418 delegate!(get = remote_host, set = set_remote_host);
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
parents: 78
diff changeset
419 delegate!(set = set_authtok_item);
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420 delegate!(set = set_old_authtok_item);
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421 }
5aa1a010f1e8 Start using PAM headers; improve owned/borrowed distinction.
Paul Fisher <paul@pfish.zone>
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422
73
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Paul Fisher <paul@pfish.zone>
parents:
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423 /// 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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424 /// or `pam_set_item`.
80
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425 #[derive(TryFromPrimitive, IntoPrimitive)]
73
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Paul Fisher <paul@pfish.zone>
parents:
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426 #[repr(i32)]
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Paul Fisher <paul@pfish.zone>
parents:
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427 #[non_exhaustive] // because C could give us anything!
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Paul Fisher <paul@pfish.zone>
parents:
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428 pub enum ItemType {
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Paul Fisher <paul@pfish.zone>
parents:
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429 /// The PAM service name.
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Paul Fisher <paul@pfish.zone>
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430 Service = 1,
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Paul Fisher <paul@pfish.zone>
parents:
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431 /// The user's login name.
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Paul Fisher <paul@pfish.zone>
parents:
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432 User = 2,
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Paul Fisher <paul@pfish.zone>
parents:
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433 /// The TTY name.
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Paul Fisher <paul@pfish.zone>
parents:
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434 Tty = 3,
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Paul Fisher <paul@pfish.zone>
parents:
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435 /// The remote host (if applicable).
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Paul Fisher <paul@pfish.zone>
parents:
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436 RemoteHost = 4,
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Paul Fisher <paul@pfish.zone>
parents:
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437 /// The conversation struct (not a CStr-based item).
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Paul Fisher <paul@pfish.zone>
parents:
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438 Conversation = 5,
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Paul Fisher <paul@pfish.zone>
parents:
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439 /// The authentication token (password).
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Paul Fisher <paul@pfish.zone>
parents:
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440 AuthTok = 6,
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Paul Fisher <paul@pfish.zone>
parents:
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441 /// The old authentication token (when changing passwords).
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Paul Fisher <paul@pfish.zone>
parents:
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442 OldAuthTok = 7,
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Paul Fisher <paul@pfish.zone>
parents:
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443 /// The remote user's name.
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Paul Fisher <paul@pfish.zone>
parents:
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444 RemoteUser = 8,
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Paul Fisher <paul@pfish.zone>
parents:
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445 /// The prompt shown when requesting a username.
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Paul Fisher <paul@pfish.zone>
parents:
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446 UserPrompt = 9,
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Paul Fisher <paul@pfish.zone>
parents:
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447 /// App-supplied function to override failure delays.
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Paul Fisher <paul@pfish.zone>
parents:
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448 FailDelay = 10,
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Paul Fisher <paul@pfish.zone>
parents:
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449 /// X display name.
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Paul Fisher <paul@pfish.zone>
parents:
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450 XDisplay = 11,
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Paul Fisher <paul@pfish.zone>
parents:
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451 /// X server authentication data.
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Paul Fisher <paul@pfish.zone>
parents:
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452 XAuthData = 12,
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Paul Fisher <paul@pfish.zone>
parents:
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453 /// The type of `pam_get_authtok`.
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Paul Fisher <paul@pfish.zone>
parents:
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454 AuthTokType = 13,
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Paul Fisher <paul@pfish.zone>
parents:
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455 }