block_padding

Struct 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 Clone for NoPadding

Source§

fn clone(&self) -> NoPadding

Returns a copy of the value. Read more
1.0.0 · Source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
Source§

impl Debug for NoPadding

Source§

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
Source§

impl RawPadding for NoPadding

Source§

const TYPE: PadType = PadType::NoPadding

Padding type
Source§

fn raw_pad(block: &mut [u8], 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 more
Source§

fn raw_unpad(block: &[u8]) -> Result<&[u8], UnpadError>

Unpad data in the block. Read more
Source§

impl Copy for NoPadding

Auto Trait Implementations§

Blanket Implementations§

Source§

impl<T> Any for T
where T: 'static + ?Sized,

Source§

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
Source§

impl<T> Borrow<T> for T
where T: ?Sized,

Source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
Source§

impl<T> BorrowMut<T> for T
where T: ?Sized,

Source§

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
Source§

impl<T> CloneToUninit for T
where T: Clone,

Source§

unsafe fn clone_to_uninit(&self, dst: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
Source§

impl<T> From<T> for T

Source§

fn from(t: T) -> T

Returns the argument unchanged.

Source§

impl<T, U> Into<U> for T
where U: From<T>,

Source§

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

Source§

impl<T, B> Padding<B> for T
where B: ArrayLength<u8>, T: RawPadding,

Source§

const TYPE: PadType = const TYPE: PadType = T::TYPE;

Padding type
Source§

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 more
Source§

fn unpad(block: &GenericArray<u8, B>) -> Result<&[u8], UnpadError>

Unpad data in the block. Read more
Source§

fn unpad_blocks(blocks: &[Block<BlockSize>]) -> Result<&[u8], UnpadError>

Unpad data in the blocks. Read more
Source§

impl<T> Same for T

Source§

type Output = T

Should always be Self
Source§

impl<T> ToOwned for T
where T: Clone,

Source§

type Owned = T

The resulting type after obtaining ownership.
Source§

fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
Source§

fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
Source§

impl<T, U> TryFrom<U> for T
where U: Into<T>,

Source§

type Error = Infallible

The type returned in the event of a conversion error.
Source§

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
Source§

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

Source§

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
Source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.