Trait block_padding::Padding [−][src]
pub trait Padding {
fn pad_block(block: &mut [u8], pos: usize) -> Result<(), PadError>;
fn unpad(data: &[u8]) -> Result<&[u8], UnpadError>;
fn pad(
buf: &mut [u8],
pos: usize,
block_size: usize
) -> Result<&mut [u8], PadError> { ... }
}Trait for padding messages divided into blocks
Required methods
fn pad_block(block: &mut [u8], pos: usize) -> Result<(), PadError>[src]
Pads block filled with data up to pos.
pos should be inside of the block and block must not be full, i.e.
pos < block.len() must be true. Otherwise method will return
PadError. Some potentially irreversible padding schemes can allow
padding of the full block, in this case aforementioned condition is
relaxed to pos <= block.len().
fn unpad(data: &[u8]) -> Result<&[u8], UnpadError>[src]
Unpad given data by truncating it according to the used padding.
In case of the malformed padding will return UnpadError
Provided methods
fn pad(
buf: &mut [u8],
pos: usize,
block_size: usize
) -> Result<&mut [u8], PadError>[src]
buf: &mut [u8],
pos: usize,
block_size: usize
) -> Result<&mut [u8], PadError>
Pads message with length pos in the provided buffer.
&buf[..pos] is perceived as the message, the buffer must contain
enough leftover space for padding: block_size - (pos % block_size)
extra bytes must be available. Otherwise method will return
PadError.
Implementors
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