Struct block_padding::Pkcs7

pub struct Pkcs7;

Pad block with bytes with value equal to the number of bytes added.

PKCS#7 described in the RFC 5652.

use block_padding::{Pkcs7, 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);
Pkcs7::pad(&mut block, pos);
assert_eq!(&block[..], b"test\x04\x04\x04\x04");
let res = Pkcs7::unpad(&block).unwrap();
assert_eq!(res, msg);

Implementations

impl Pkcs7

pub(crate) fn unpad(block: &[u8], strict: bool) -> Result<&[u8], UnpadError>

Trait Implementations

impl Clone for Pkcs7

fn clone(&self) -> Pkcs7

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Pkcs7

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

Formats the value using the given formatter.

impl RawPadding for Pkcs7

const TYPE: PadType = PadType::Reversible

Padding type

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).

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

Unpad data in the block.

impl Copy for Pkcs7