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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:06:37 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:06:37 +0000
commit246f239d9f40f633160f0c18f87a20922d4e77bb (patch)
tree5a88572663584b3d4d28e5a20e10abab1be40884 /vendor/block-buffer-0.7.3/src/lib.rs
parentReleasing progress-linux version 1.64.0+dfsg1-1~progress7.99u1. (diff)
downloadrustc-246f239d9f40f633160f0c18f87a20922d4e77bb.tar.xz
rustc-246f239d9f40f633160f0c18f87a20922d4e77bb.zip
Merging debian version 1.65.0+dfsg1-2.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'vendor/block-buffer-0.7.3/src/lib.rs')
-rw-r--r--vendor/block-buffer-0.7.3/src/lib.rs210
1 files changed, 0 insertions, 210 deletions
diff --git a/vendor/block-buffer-0.7.3/src/lib.rs b/vendor/block-buffer-0.7.3/src/lib.rs
deleted file mode 100644
index d3b691655..000000000
--- a/vendor/block-buffer-0.7.3/src/lib.rs
+++ /dev/null
@@ -1,210 +0,0 @@
-#![no_std]
-pub extern crate byteorder;
-pub extern crate block_padding;
-pub extern crate generic_array;
-extern crate byte_tools;
-
-use byteorder::{ByteOrder, BE};
-use byte_tools::zero;
-use block_padding::{Padding, PadError};
-use generic_array::{GenericArray, ArrayLength};
-use core::slice;
-
-/// Buffer for block processing of data
-#[derive(Clone, Default)]
-pub struct BlockBuffer<BlockSize: ArrayLength<u8>> {
- buffer: GenericArray<u8, BlockSize>,
- pos: usize,
-}
-
-#[inline(always)]
-unsafe fn cast<N: ArrayLength<u8>>(block: &[u8]) -> &GenericArray<u8, N> {
- debug_assert_eq!(block.len(), N::to_usize());
- &*(block.as_ptr() as *const GenericArray<u8, N>)
-}
-
-
-
-impl<BlockSize: ArrayLength<u8>> BlockBuffer<BlockSize> {
- /// Process data in `input` in blocks of size `BlockSize` using function `f`.
- #[inline]
- pub fn input<F>(&mut self, mut input: &[u8], mut f: F)
- where F: FnMut(&GenericArray<u8, BlockSize>)
- {
- // If there is already data in the buffer, process it if we have
- // enough to complete the chunk.
- let rem = self.remaining();
- if self.pos != 0 && input.len() >= rem {
- let (l, r) = input.split_at(rem);
- input = r;
- self.buffer[self.pos..].copy_from_slice(l);
- self.pos = 0;
- f(&self.buffer);
- }
-
- // While we have at least a full buffer size chunks's worth of data,
- // process that data without copying it into the buffer
- while input.len() >= self.size() {
- let (block, r) = input.split_at(self.size());
- input = r;
- f(unsafe { cast(block) });
- }
-
- // Copy any remaining data into the buffer.
- self.buffer[self.pos..self.pos+input.len()].copy_from_slice(input);
- self.pos += input.len();
- }
-
- /*
- /// Process data in `input` in blocks of size `BlockSize` using function `f`, which accepts
- /// slice of blocks.
- #[inline]
- pub fn input2<F>(&mut self, mut input: &[u8], mut f: F)
- where F: FnMut(&[GenericArray<u8, BlockSize>])
- {
- // If there is already data in the buffer, process it if we have
- // enough to complete the chunk.
- let rem = self.remaining();
- if self.pos != 0 && input.len() >= rem {
- let (l, r) = input.split_at(rem);
- input = r;
- self.buffer[self.pos..].copy_from_slice(l);
- self.pos = 0;
- f(slice::from_ref(&self.buffer));
- }
-
- // While we have at least a full buffer size chunks's worth of data,
- // process it data without copying into the buffer
- let n_blocks = input.len()/self.size();
- let (left, right) = input.split_at(n_blocks*self.size());
- // safe because we guarantee that `blocks` does not point outside of `input`
- let blocks = unsafe {
- slice::from_raw_parts(
- left.as_ptr() as *const GenericArray<u8, BlockSize>,
- n_blocks,
- )
- };
- f(blocks);
-
- // Copy remaining data into the buffer.
- self.buffer[self.pos..self.pos+right.len()].copy_from_slice(right);
- self.pos += right.len();
- }
- */
-
- /// Variant that doesn't flush the buffer until there's additional
- /// data to be processed. Suitable for tweakable block ciphers
- /// like Threefish that need to know whether a block is the *last*
- /// data block before processing it.
- #[inline]
- pub fn input_lazy<F>(&mut self, mut input: &[u8], mut f: F)
- where F: FnMut(&GenericArray<u8, BlockSize>)
- {
- let rem = self.remaining();
- if self.pos != 0 && input.len() > rem {
- let (l, r) = input.split_at(rem);
- input = r;
- self.buffer[self.pos..].copy_from_slice(l);
- self.pos = 0;
- f(&self.buffer);
- }
-
- while input.len() > self.size() {
- let (block, r) = input.split_at(self.size());
- input = r;
- f(unsafe { cast(block) });
- }
-
- self.buffer[self.pos..self.pos+input.len()].copy_from_slice(input);
- self.pos += input.len();
- }
-
- /// Pad buffer with `prefix` and make sure that internall buffer
- /// has at least `up_to` free bytes. All remaining bytes get
- /// zeroed-out.
- #[inline]
- fn digest_pad<F>(&mut self, up_to: usize, f: &mut F)
- where F: FnMut(&GenericArray<u8, BlockSize>)
- {
- if self.pos == self.size() {
- f(&self.buffer);
- self.pos = 0;
- }
- self.buffer[self.pos] = 0x80;
- self.pos += 1;
-
- zero(&mut self.buffer[self.pos..]);
-
- if self.remaining() < up_to {
- f(&self.buffer);
- zero(&mut self.buffer[..self.pos]);
- }
- }
-
- /// Pad message with 0x80, zeros and 64-bit message length
- /// in a byte order specified by `B`
- #[inline]
- pub fn len64_padding<B, F>(&mut self, data_len: u64, mut f: F)
- where B: ByteOrder, F: FnMut(&GenericArray<u8, BlockSize>)
- {
- // TODO: replace `F` with `impl Trait` on MSRV bump
- self.digest_pad(8, &mut f);
- let s = self.size();
- B::write_u64(&mut self.buffer[s-8..], data_len);
- f(&self.buffer);
- self.pos = 0;
- }
-
-
- /// Pad message with 0x80, zeros and 128-bit message length
- /// in the big-endian byte order
- #[inline]
- pub fn len128_padding_be<F>(&mut self, hi: u64, lo: u64, mut f: F)
- where F: FnMut(&GenericArray<u8, BlockSize>)
- {
- // TODO: on MSRV bump replace `F` with `impl Trait`, use `u128`, add `B`
- self.digest_pad(16, &mut f);
- let s = self.size();
- BE::write_u64(&mut self.buffer[s-16..s-8], hi);
- BE::write_u64(&mut self.buffer[s-8..], lo);
- f(&self.buffer);
- self.pos = 0;
- }
-
- /// Pad message with a given padding `P`
- ///
- /// Returns `PadError` if internall buffer is full, which can only happen if
- /// `input_lazy` was used.
- #[inline]
- pub fn pad_with<P: Padding>(&mut self)
- -> Result<&mut GenericArray<u8, BlockSize>, PadError>
- {
- P::pad_block(&mut self.buffer[..], self.pos)?;
- self.pos = 0;
- Ok(&mut self.buffer)
- }
-
- /// Return size of the internall buffer in bytes
- #[inline]
- pub fn size(&self) -> usize {
- BlockSize::to_usize()
- }
-
- /// Return current cursor position
- #[inline]
- pub fn position(&self) -> usize {
- self.pos
- }
-
- /// Return number of remaining bytes in the internall buffer
- #[inline]
- pub fn remaining(&self) -> usize {
- self.size() - self.pos
- }
-
- /// Reset buffer by setting cursor position to zero
- #[inline]
- pub fn reset(&mut self) {
- self.pos = 0
- }
-}