Trait ExpandMsg

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

    // Required method
    fn expand_message(
        msgs: &[&[u8]],
        dsts: &'a [&'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]], dsts: &'a [&'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

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors

impl<'a, HashT> ExpandMsg<'a> for ExpandMsgXmd<HashT>

where HashT: BlockSizeUser + Default + FixedOutput + HashMarker, HashT::OutputSize: IsLess<U256> + 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>