xrpl::HardenedHash< HashAlgorithm > Class Template Reference

Seed functor once per construction. More...

#include <hardened_hash.h>

Collaboration diagram for xrpl::HardenedHash< HashAlgorithm >:

Public Types
using	result_type = HashAlgorithm::result_type

Public Member Functions
	HardenedHash ()=default
template<class T>
result_type	operator() (T const &t) const noexcept

Private Attributes
detail::seed_pair	seeds_ {detail::makeSeedPair<>()}

Detailed Description

template<class HashAlgorithm = beast::Xxhasher>
class xrpl::HardenedHash< HashAlgorithm >

Seed functor once per construction.

A std compatible hash adapter that resists adversarial inputs. For this to work, T must implement in its own namespace:

template <class Hasher>
void
hash_append (Hasher& h, T const& t) noexcept
{
    // hash_append each base and member that should
    //  participate in forming the hash
    using beast::hash_append;
    hash_append (h, static_cast<T::base1 const&>(t));
    hash_append (h, static_cast<T::base2 const&>(t));
    // ...
    hash_append (h, t.member1);
    hash_append (h, t.member2);
    // ...
}

Do not use any version of Murmur or CityHash for the Hasher template parameter (the hashing algorithm). For details see https://131002.net/siphash/#at

Definition at line 72 of file hardened_hash.h.

Member Typedef Documentation

result_type

template<class HashAlgorithm = beast::Xxhasher>

using xrpl::HardenedHash< HashAlgorithm >::result_type = HashAlgorithm::result_type

Definition at line 78 of file hardened_hash.h.

Constructor & Destructor Documentation

HardenedHash()

template<class HashAlgorithm = beast::Xxhasher>

xrpl::HardenedHash< HashAlgorithm >::HardenedHash ( )

default

Member Function Documentation

operator()()

template<class HashAlgorithm = beast::Xxhasher>

template<class T>

result_type xrpl::HardenedHash< HashAlgorithm >::operator() ( T const & t ) const

noexcept

Definition at line 84 of file hardened_hash.h.

Member Data Documentation

seeds_

template<class HashAlgorithm = beast::Xxhasher>

detail::seed_pair xrpl::HardenedHash< HashAlgorithm >::seeds_ {detail::makeSeedPair<>()}

private

Definition at line 75 of file hardened_hash.h.