Mercurial > crates > nonstick

annotate libpam-sys/src/helpers.rs @ 116:a12706e42c9d default tip

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Logging, macros, and building: - Changes logging API to accept the `Location` of the log statement. Fixes OpenPAM implementation. - Stops publicly exporting doc macros. - Uses dlopen to detect the PAM library rather than header jankery.
author Paul Fisher <paul@pfish.zone>
date Sun, 29 Jun 2025 18:27:51 -0400
parents 2346fd501b7a
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
106
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
1 //! This module contains a few non-required helpers to deal with some of the
109
bb465393621f Minor cleanup and reorg.
Paul Fisher <paul@pfish.zone>
parents: 106
diff changeset
2 //! more annoying memory management in the PAM API.
bb465393621f Minor cleanup and reorg.
Paul Fisher <paul@pfish.zone>
parents: 106
diff changeset
3 use crate::structs::BinaryPayload;
110
2346fd501b7a Add tests for constants and do other macro niceties.
Paul Fisher <paul@pfish.zone>
parents: 109
diff changeset
4 use std::error::Error;
109
bb465393621f Minor cleanup and reorg.
Paul Fisher <paul@pfish.zone>
parents: 106
diff changeset
5 use std::fmt;
110
2346fd501b7a Add tests for constants and do other macro niceties.
Paul Fisher <paul@pfish.zone>
parents: 109
diff changeset
6 use std::mem::ManuallyDrop;
109
bb465393621f Minor cleanup and reorg.
Paul Fisher <paul@pfish.zone>
parents: 106
diff changeset
7 use std::ptr::NonNull;
106
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
8
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
9 /// Error returned when attempting to allocate a buffer that is too big.
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
10 ///
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
11 /// This is specifically used in [`OwnedBinaryPayload`] when you try to allocate
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
12 /// a message larger than 2<sup>32</sup> bytes.
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
13 #[derive(Debug, PartialEq)]
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
14 pub struct TooBigError {
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
15 pub size: usize,
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
16 pub max: usize,
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
17 }
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
18
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
19 impl Error for TooBigError {}
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
20
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
21 impl fmt::Display for TooBigError {
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
22 fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
23 write!(
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
24 f,
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
25 "can't allocate a message of {size} bytes (max {max})",
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
26 size = self.size,
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
27 max = self.max
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
28 )
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
29 }
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
30 }
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
31
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
32 /// A trait wrapping memory management.
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
33 ///
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
34 /// This is intended to allow you to bring your own allocator for
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
35 /// [`OwnedBinaryPayload`]s.
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
36 ///
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
37 /// For an implementation example, see the implementation of this trait
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
38 /// for [`Vec`].
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
39 pub trait Buffer<T: Default> {
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
40 /// Allocates a buffer of `len` elements, filled with the default.
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
41 fn allocate(len: usize) -> Self;
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
42
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
43 fn as_ptr(&self) -> *const T;
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
44
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
45 /// Returns a slice view of `size` elements of the given memory.
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
46 ///
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
47 /// # Safety
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
48 ///
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
49 /// The caller must not request more elements than are allocated.
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
50 unsafe fn as_mut_slice(&mut self, len: usize) -> &mut [T];
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
51
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
52 /// Consumes this ownership and returns a pointer to the start of the arena.
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
53 fn into_ptr(self) -> NonNull<T>;
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
54
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
55 /// "Adopts" the memory at the given pointer, taking it under management.
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
56 ///
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
57 /// Running the operation:
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
58 ///
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
59 /// ```
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
60 /// # use libpam_sys::helpers::Buffer;
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
61 /// # fn test<T: Default, OwnerType: Buffer<T>>(bytes: usize) {
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
62 /// let owner = OwnerType::allocate(bytes);
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
63 /// let ptr = owner.into_ptr();
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
64 /// let owner = unsafe { OwnerType::from_ptr(ptr, bytes) };
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
65 /// # }
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
66 /// ```
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
67 ///
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
68 /// must be a no-op.
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
69 ///
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
70 /// # Safety
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
71 ///
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
72 /// The pointer must be valid, and the caller must provide the exact size
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
73 /// of the given arena.
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
74 unsafe fn from_ptr(ptr: NonNull<T>, bytes: usize) -> Self;
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
75 }
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
76
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
77 impl<T: Default> Buffer<T> for Vec<T> {
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
78 fn allocate(bytes: usize) -> Self {
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
79 (0..bytes).map(|_| Default::default()).collect()
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
80 }
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
81
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
82 fn as_ptr(&self) -> *const T {
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
83 Vec::as_ptr(self)
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
84 }
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
85
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
86 unsafe fn as_mut_slice(&mut self, bytes: usize) -> &mut [T] {
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
87 debug_assert!(bytes <= self.len());
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
88 Vec::as_mut(self)
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
89 }
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
90
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
91 fn into_ptr(self) -> NonNull<T> {
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
92 let mut me = ManuallyDrop::new(self);
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
93 // SAFETY: a Vec is guaranteed to have a nonzero pointer.
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
94 unsafe { NonNull::new_unchecked(me.as_mut_ptr()) }
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
95 }
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
96
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
97 unsafe fn from_ptr(ptr: NonNull<T>, bytes: usize) -> Self {
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
98 Vec::from_raw_parts(ptr.as_ptr(), bytes, bytes)
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
99 }
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
100 }
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
101
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
102 /// A binary message owned by some storage.
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
103 ///
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
104 /// This is an owned, memory-managed version of [`BinaryPayload`].
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
105 /// The `O` type manages the memory where the payload lives.
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
106 /// [`Vec<u8>`] is one such manager and can be used when ownership
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
107 /// of the data does not need to transit through PAM.
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
108 #[derive(Debug)]
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
109 pub struct OwnedBinaryPayload<Owner: Buffer<u8>>(Owner);
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
110
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
111 impl<O: Buffer<u8>> OwnedBinaryPayload<O> {
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
112 /// Allocates a new OwnedBinaryPayload.
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
113 ///
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
114 /// This will return a [`TooBigError`] if you try to allocate too much
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
115 /// (more than [`BinaryPayload::MAX_SIZE`]).
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
116 pub fn new(data_type: u8, data: &[u8]) -> Result<Self, TooBigError> {
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
117 let total_len: u32 = (data.len() + 5).try_into().map_err(|_| TooBigError {
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
118 size: data.len(),
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
119 max: BinaryPayload::MAX_SIZE,
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
120 })?;
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
121 let total_len = total_len as usize;
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
122 let mut buf = O::allocate(total_len);
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
123 // SAFETY: We just allocated this exact size.
109
bb465393621f Minor cleanup and reorg.
Paul Fisher <paul@pfish.zone>
parents: 106
diff changeset
124 BinaryPayload::fill(unsafe { buf.as_mut_slice(total_len) }, data_type, data);
106
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
125 Ok(Self(buf))
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
126 }
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
127
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
128 /// The contents of the buffer.
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
129 pub fn contents(&self) -> (u8, &[u8]) {
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
130 unsafe { BinaryPayload::contents(self.as_ptr()) }
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
131 }
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
132
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
133 /// The total bytes needed to store this, including the header.
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
134 pub fn total_bytes(&self) -> usize {
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
135 unsafe {
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
136 self.0
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
137 .as_ptr()
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
138 .cast::<BinaryPayload>()
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
139 .as_ref()
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
140 .unwrap_unchecked()
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
141 .total_bytes()
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
142 }
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
143 }
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
144
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
145 /// Unwraps this into the raw storage backing it.
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
146 pub fn into_inner(self) -> O {
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
147 self.0
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
148 }
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
149
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
150 /// Gets a const pointer to the start of the message's buffer.
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
151 pub fn as_ptr(&self) -> *const BinaryPayload {
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
152 self.0.as_ptr().cast()
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
153 }
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
154
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
155 /// Consumes ownership of this message and converts it to a raw pointer
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
156 /// to the start of the message.
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
157 ///
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
158 /// To clean this up, you should eventually pass it into [`Self::from_ptr`]
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
159 /// with the same `O` ownership type.
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
160 pub fn into_ptr(self) -> NonNull<BinaryPayload> {
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
161 self.0.into_ptr().cast()
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
162 }
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
163
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
164 /// Takes ownership of the given pointer.
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
165 ///
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
166 /// # Safety
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
167 ///
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
168 /// You must provide a valid pointer, allocated by (or equivalent to one
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
169 /// allocated by) [`Self::new`]. For instance, passing a pointer allocated
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
170 /// by `malloc` to `OwnedBinaryPayload::<Vec<u8>>::from_ptr` is not allowed.
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
171 pub unsafe fn from_ptr(ptr: NonNull<BinaryPayload>) -> Self {
109
bb465393621f Minor cleanup and reorg.
Paul Fisher <paul@pfish.zone>
parents: 106
diff changeset
172 Self(O::from_ptr(ptr.cast(), ptr.as_ref().total_bytes()))
106
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
173 }
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
174 }
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
175
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
176 #[cfg(test)]
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
177 mod tests {
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
178 use super::*;
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
179
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
180 type VecPayload = OwnedBinaryPayload<Vec<u8>>;
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
181
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
182 #[test]
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
183 fn test_binary_payload() {
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
184 let simple_message = &[0u8, 0, 0, 16, 0xff, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
185 let empty = &[0u8; 5];
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
186
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
187 assert_eq!((0xff, &[0u8, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10][..]), unsafe {
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
188 BinaryPayload::contents(simple_message.as_ptr().cast())
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
189 });
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
190 assert_eq!((0x00, &[][..]), unsafe {
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
191 BinaryPayload::contents(empty.as_ptr().cast())
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
192 });
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
193 }
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
194
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
195 #[test]
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
196 fn test_owned_binary_payload() {
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
197 let (typ, data) = (
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
198 112,
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
199 &[0, 1, 1, 8, 9, 9, 9, 8, 8, 1, 9, 9, 9, 1, 1, 9, 7, 2, 5, 3][..],
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
200 );
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
201 let payload = VecPayload::new(typ, data).unwrap();
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
202 assert_eq!((typ, data), payload.contents());
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
203 let ptr = payload.into_ptr();
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
204 let payload = unsafe { VecPayload::from_ptr(ptr) };
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
205 assert_eq!((typ, data), payload.contents());
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
206 }
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
207
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
208 #[test]
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
209 #[ignore]
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
210 fn test_owned_too_big() {
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
211 let data = vec![0xFFu8; 0x1_0000_0001];
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
212 assert_eq!(
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
213 TooBigError {
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
214 max: 0xffff_fffa,
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
215 size: 0x1_0000_0001
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
216 },
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
217 VecPayload::new(5, &data).unwrap_err()
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
218 )
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
219 }
49d9e2b5c189 An irresponsible mix of implementing libpam-sys and other stuff.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
220 }