Trait elliptic_curve::hash2curve::ExpandMsg

pub trait ExpandMsg<'a> {
    type Expander: Expander + Sized;

    fn expand_message(
        msgs: &[&[u8]],
        dst: &'a [u8],
        len_in_bytes: usize
    ) -> Result<Self::Expander>;
}

Available on crate feature hash2curve only.

Trait for types implementing expand_message interface for hash_to_field.

Errors

See implementors of ExpandMsg for errors.

Required Associated Types

type Expander: Expander + Sized

Type holding data for the Expander.

Required Methods

fn expand_message(
    msgs: &[&[u8]],
    dst: &'a [u8],
    len_in_bytes: usize
) -> Result<Self::Expander>

Expands msg to the required number of bytes.

Returns an expander that can be used to call read until enough bytes have been consumed

Implementors

impl<'a, HashT> ExpandMsg<'a> for ExpandMsgXmd<HashT> where
    HashT: Digest + BlockSizeUser,
    HashT::OutputSize: IsLess<U256>,
    HashT::OutputSize: IsLessOrEqual<HashT::BlockSize>, 

ExpandMsgXmd implements expand_message_xmd for the ExpandMsg trait

type Expander = ExpanderXmd<'a, HashT>

impl<'a, HashT> ExpandMsg<'a> for ExpandMsgXof<HashT> where
    HashT: Default + ExtendableOutput + Update, 

ExpandMsgXof implements expand_message_xof for the ExpandMsg trait

type Expander = ExpandMsgXof<HashT>