Trait cipher::StreamCipherCore

pub trait StreamCipherCore: BlockSizeUser + Sized {
    // Required methods
    fn remaining_blocks(&self) -> Option<usize>;
    fn process_with_backend(
        &mut self,
        f: impl StreamClosure<BlockSize = Self::BlockSize>
    );

    // Provided methods
    fn write_keystream_block(&mut self, block: &mut Block<Self>) { ... }
    fn write_keystream_blocks(&mut self, blocks: &mut [Block<Self>]) { ... }
    fn apply_keystream_block_inout(&mut self, block: InOut<'_, '_, Block<Self>>) { ... }
    fn apply_keystream_blocks(&mut self, blocks: &mut [Block<Self>]) { ... }
    fn apply_keystream_blocks_inout(
        &mut self,
        blocks: InOutBuf<'_, '_, Block<Self>>
    ) { ... }
    fn try_apply_keystream_partial(
        self,
        buf: InOutBuf<'_, '_, u8>
    ) -> Result<(), StreamCipherError> { ... }
    fn apply_keystream_partial(self, buf: InOutBuf<'_, '_, u8>) { ... }
}

Block-level synchronous stream ciphers.

Required Methods

fn remaining_blocks(&self) -> Option<usize>

Return number of remaining blocks before cipher wraps around.

Returns None if number of remaining blocks can not be computed (e.g. in ciphers based on the sponge construction) or it’s too big to fit into usize.

fn process_with_backend( &mut self, f: impl StreamClosure<BlockSize = Self::BlockSize> )

Process data using backend provided to the rank-2 closure.

Provided Methods

fn write_keystream_block(&mut self, block: &mut Block<Self>)

Write keystream block.

WARNING: this method does not check number of remaining blocks!

fn write_keystream_blocks(&mut self, blocks: &mut [Block<Self>])

Write keystream blocks.

WARNING: this method does not check number of remaining blocks!

fn apply_keystream_block_inout(&mut self, block: InOut<'_, '_, Block<Self>>)

Apply keystream block.

WARNING: this method does not check number of remaining blocks!

fn apply_keystream_blocks(&mut self, blocks: &mut [Block<Self>])

Apply keystream blocks.

WARNING: this method does not check number of remaining blocks!

fn apply_keystream_blocks_inout(&mut self, blocks: InOutBuf<'_, '_, Block<Self>>)

Apply keystream blocks.

WARNING: this method does not check number of remaining blocks!

fn try_apply_keystream_partial( self, buf: InOutBuf<'_, '_, u8> ) -> Result<(), StreamCipherError>

Try to apply keystream to data not divided into blocks.

Consumes cipher since it may consume final keystream block only partially.

Returns an error if number of remaining blocks is not sufficient for processing the input data.

fn apply_keystream_partial(self, buf: InOutBuf<'_, '_, u8>)

Try to apply keystream to data not divided into blocks.

Consumes cipher since it may consume final keystream block only partially.

Panics

If number of remaining blocks is not sufficient for processing the input data.

Implementors