block_padding

Struct ZeroPadding

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pub struct ZeroPadding;
Expand description

Pad block with zeros.

use block_padding::{ZeroPadding, 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);
ZeroPadding::pad(&mut block, pos);
assert_eq!(&block[..], b"test\x00\x00\x00\x00");
let res = ZeroPadding::unpad(&mut block).unwrap();
assert_eq!(res, msg);

Note that zero padding is not reversible for messages which end with one or more zero bytes.

Trait Implementations§

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impl Clone for ZeroPadding

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fn clone(&self) -> ZeroPadding

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for ZeroPadding

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

Formats the value using the given formatter. Read more
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impl RawPadding for ZeroPadding

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const TYPE: PadType = PadType::Ambiguous

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

Unpad data in the block. Read more
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impl Copy for ZeroPadding

Auto Trait Implementations§

Blanket Implementations§

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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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
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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

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fn into(self) -> U

Calls U::from(self).

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

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

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

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

Unpad data in the block. Read more
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fn unpad_blocks(blocks: &[Block<BlockSize>]) -> Result<&[u8], UnpadError>

Unpad data in the blocks. Read more
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impl<T> Same for T

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type Output = T

Should always be Self
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.