Struct block_padding::NoPadding
source · pub struct NoPadding;
Expand description
Don’t pad the data. Useful for key wrapping.
use block_padding::{NoPadding, Padding};
use generic_array::{GenericArray, typenum::U8};
let msg = b"test";
let pos = msg.len();
let mut block: GenericArray::<u8, U8> = [0xff; 8].into();
block[..pos].copy_from_slice(msg);
NoPadding::pad(&mut block, pos);
assert_eq!(&block[..], b"test\xff\xff\xff\xff");
let res = NoPadding::unpad(&block).unwrap();
assert_eq!(res, b"test\xff\xff\xff\xff");
Note that even though the passed length of the message is equal to 4,
the size of unpadded message is equal to the block size of 8 bytes.
Also padded message contains “garbage” bytes stored in the block buffer.
Thus NoPadding
generally should not be used with data length of which
is not multiple of block size.
Trait Implementations§
source§impl RawPadding for NoPadding
impl RawPadding for NoPadding
impl Copy for NoPadding
Auto Trait Implementations§
impl Freeze for NoPadding
impl RefUnwindSafe for NoPadding
impl Send for NoPadding
impl Sync for NoPadding
impl Unpin for NoPadding
impl UnwindSafe for NoPadding
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
source§impl<T> CloneToUninit for Twhere
T: Clone,
impl<T> CloneToUninit for Twhere
T: Clone,
source§default unsafe fn clone_to_uninit(&self, dst: *mut T)
default unsafe fn clone_to_uninit(&self, dst: *mut T)
🔬This is a nightly-only experimental API. (
clone_to_uninit
)source§impl<T> CloneToUninit for Twhere
T: Copy,
impl<T> CloneToUninit for Twhere
T: Copy,
source§unsafe fn clone_to_uninit(&self, dst: *mut T)
unsafe fn clone_to_uninit(&self, dst: *mut T)
🔬This is a nightly-only experimental API. (
clone_to_uninit
)source§impl<T, B> Padding<B> for T
impl<T, B> Padding<B> for T
source§fn pad(block: &mut GenericArray<u8, B>, pos: usize)
fn pad(block: &mut GenericArray<u8, B>, pos: usize)
Pads
block
filled with data up to pos
(i.e length of a message
stored in the block is equal to pos
). Read moresource§fn unpad(block: &GenericArray<u8, B>) -> Result<&[u8], UnpadError>
fn unpad(block: &GenericArray<u8, B>) -> Result<&[u8], UnpadError>
Unpad data in the
block
. Read moresource§fn unpad_blocks(blocks: &[Block<BlockSize>]) -> Result<&[u8], UnpadError>
fn unpad_blocks(blocks: &[Block<BlockSize>]) -> Result<&[u8], UnpadError>
Unpad data in the
blocks
. Read more