Mercurial > crates > nonstick

annotate src/constants.rs @ 57:2a5c83d04b93 v0.0.4

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Update some docs; bump to v0.0.4.
author Paul Fisher <paul@pfish.zone>
date Mon, 05 May 2025 00:16:00 -0400
parents daa2cde64601
children 3f4a77aa88be
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
56
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diff changeset
1 use bitflags::bitflags;
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2 use libc::{c_int, c_uint};
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3 use num_derive::{FromPrimitive, ToPrimitive};
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4 use num_traits::{FromPrimitive, ToPrimitive};
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5 // TODO: Import constants from C header file at compile time.
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6
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7 // The Linux-PAM flags
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8 // see /usr/include/security/_pam_types.h
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9 bitflags! {
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10 #[derive(Debug, PartialEq)]
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11 #[repr(transparent)]
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12 pub struct Flags: c_uint {
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13 const SILENT = 0x8000;
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14 const DISALLOW_NULL_AUTHTOK = 0x0001;
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15 const ESTABLISH_CRED = 0x0002;
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16 const DELETE_CRED = 0x0004;
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17 const REINITIALIZE_CRED = 0x0008;
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18 const REFRESH_CRED = 0x0010;
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19 const CHANGE_EXPIRED_AUTHTOK= 0x0020;
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20 }
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21 }
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22
56
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23 /// Styles of message that are shown to the user.
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24 #[derive(Debug, PartialEq, FromPrimitive, ToPrimitive)]
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25 #[non_exhaustive] // non-exhaustive because C might give us back anything!
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26 pub enum MessageStyle {
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27 /// Requests information from the user; will be masked when typing.
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28 PromptEchoOff = 1,
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29 /// Requests information from the user; will not be masked.
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30 PromptEchoOn = 2,
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31 /// An error message.
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32 ErrorMsg = 3,
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33 /// An informational message.
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34 TextInfo = 4,
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35 /// Yes/No/Maybe conditionals. Linux-PAM specific.
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36 RadioType = 5,
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37 /// For server–client non-human interaction.
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38 /// NOT part of the X/Open PAM specification.
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39 BinaryPrompt = 7,
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40 }
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41
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42 impl From<MessageStyle> for c_int {
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43 fn from(val: MessageStyle) -> Self {
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44 val.to_i32().unwrap_or(0)
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45 }
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46 }
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47
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48 /// The Linux-PAM error return values.
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49 /// Success is instead represented by the `Ok` entry of a `Result`.
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50 /// Most abbreviations (except `AuthTok` and `Max`) are now full words.
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51 /// For more detailed information, see
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52 /// `/usr/include/security/_pam_types.h`.
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53 #[allow(non_camel_case_types, dead_code)]
56
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54 #[derive(Copy, Clone, Debug, PartialEq, thiserror::Error, FromPrimitive, ToPrimitive)]
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55 #[non_exhaustive] // C might give us anything!
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56 pub enum ErrorCode {
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57 #[error("dlopen() failure when dynamically loading a service module")]
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58 OpenError = 1,
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59 #[error("symbol not found")]
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60 SymbolError = 2,
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61 #[error("error in service module")]
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62 ServiceError = 3,
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63 #[error("system error")]
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64 SystemError = 4,
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65 #[error("memory buffer error")]
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66 BufferError = 5,
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67 #[error("permission denied")]
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68 PermissionDenied = 6,
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69 #[error("authentication failure")]
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70 AuthenticationError = 7,
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71 #[error("cannot access authentication data due to insufficient credentials")]
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72 CredentialsInsufficient = 8,
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73 #[error("underlying authentication service cannot retrieve authentication information")]
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74 AuthInfoUnavailable = 9,
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75 #[error("user not known to the underlying authentication module")]
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76 UserUnknown = 10,
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77 #[error("retry limit reached; do not attempt further")]
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78 MaxTries = 11,
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79 #[error("new authentication token required")]
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80 NewAuthTokRequired = 12,
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81 #[error("user account has expired")]
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82 AccountExpired = 13,
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83 #[error("cannot make/remove an entry for the specified session")]
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84 SessionError = 14,
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85 #[error("underlying authentication service cannot retrieve user credentials")]
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86 CredentialsUnavailable = 15,
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87 #[error("user credentials expired")]
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88 CredentialsExpired = 16,
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89 #[error("failure setting user credentials")]
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90 CredentialsError = 17,
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91 #[error("no module-specific data is present")]
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92 NoModuleData = 18,
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93 #[error("conversation error")]
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94 ConversationError = 19,
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95 #[error("authentication token manipulation error")]
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96 AuthTokError = 20,
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97 #[error("authentication information cannot be recovered")]
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98 AuthTokRecoveryError = 21,
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99 #[error("authentication token lock busy")]
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100 AuthTokLockBusy = 22,
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101 #[error("authentication token aging disabled")]
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102 AuthTokDisableAging = 23,
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103 #[error("preliminary check by password service")]
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104 TryAgain = 24,
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105 #[error("ignore underlying account module, regardless of control flag")]
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106 Ignore = 25,
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107 #[error("critical error; this module should fail now")]
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108 Abort = 26,
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109 #[error("authentication token has expired")]
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110 AuthTokExpired = 27,
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111 #[error("module is not known")]
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112 ModuleUnknown = 28,
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113 #[error("bad item passed to pam_[whatever]_item")]
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114 BadItem = 29,
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115 #[error("conversation function is event-driven and data is not available yet")]
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116 ConversationAgain = 30,
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117 #[error("call this function again to complete authentication stack")]
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118 Incomplete = 31,
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119 }
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120
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121 pub type PamResult<T> = Result<T, ErrorCode>;
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122 impl ErrorCode {
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123 /// Converts a PamResult into the result code that C wants.
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124 pub fn result_to_c(value: PamResult<()>) -> c_int {
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125 match value {
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126 Ok(_) => 0, // PAM_SUCCESS
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127 Err(otherwise) => otherwise.into(),
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128 }
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129 }
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130
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131 /// Converts a C result code into a PamResult, with success as Ok.
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132 pub fn result_from(value: c_int) -> PamResult<()> {
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133 match value {
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134 0 => Ok(()),
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135 value => Err(Self::from_i64(value as i64).unwrap_or(Self::ConversationError))
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136 }
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137 }
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138 }
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139
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140 impl From<ErrorCode> for c_int {
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141 fn from(val: ErrorCode) -> Self {
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142 val.to_i32().unwrap_or(0)
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143 }
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Paul Fisher <paul@pfish.zone>
parents: 55
diff changeset
144 }