ASCON Algorithms More...

Typedefs
typedef hasher< detail::ascon_provider< detail::ascon_type::hash > >	digestpp::ascon_hash
	ASCON-HASH (Ascon-Hash) hash function.

typedef hasher< detail::ascon_provider< detail::ascon_type::xof > >	digestpp::ascon_xof
	ASCON-XOF128 extendable output function.

typedef hasher< detail::ascon_provider< detail::ascon_type::cxof >, mixin::ascon_cxof_mixin >	digestpp::ascon_cxof
	ASCON-CXOF128 customizable extendable output function.

Detailed Description

ASCON Algorithms

Typedef Documentation

◆ ascon_cxof

typedef hasher<detail::ascon_provider<detail::ascon_type::cxof>, mixin::ascon_cxof_mixin> digestpp::ascon_cxof

ASCON-CXOF128 customizable extendable output function.

A variant of ASCON-XOF128 that accepts a customization string. This allows for domain separation: different customization strings produce completely unrelated output streams for the same input message.

Part of the NIST Lightweight Cryptography standard.

When used without customization, output differs from Ascon-XOF128.

Standardized in NIST SP 800-232 (August 2025). Provides 128-bit security level.

Type:: Extendable output function (XOF).

Optional parameters:

set_customization() - Customization string for domain separation

Optional parameters:: customization

See mixin::ascon_cxof_mixin for the description of optional parameters.

Example:: // Absorb a string and squeeze 32 bytes of output

digestpp::ascon_cxof hasher;

hasher.set_customization("My Custom ASCON");

hasher.absorb("The quick brown fox jumps over the lazy dog");

std::cout << hasher.hexsqueeze(32) << '\n';

digestpp::hasher
Main class template implementing the public API for hashing.
Definition hasher.hpp:38

digestpp::hasher::absorb
hasher & absorb(const T *data, size_t len)
Absorbs bytes from a C-style pointer to character buffer.
Definition hasher.hpp:86

digestpp::hasher::hexsqueeze
std::string hexsqueeze(size_t len)
Squeeze bytes and return them as a hex string.
Definition hasher.hpp:296

Example output:: 73910abcd1ffbbd7685947734b964c516bff020c372d6a7b684ce23c69960598

See also: hasher, mixin::ascon_cxof_mixin, ascon_xof

◆ ascon_hash

typedef hasher<detail::ascon_provider<detail::ascon_type::hash> > digestpp::ascon_hash

ASCON-HASH (Ascon-Hash) hash function.

Winner of the NIST Lightweight Cryptography (LWC) competition (2023). Designed by Christoph Dobraunig, Maria Eichlseder, Florian Mendel, and Martin Schläffer.

Ascon-Hash uses a sponge construction with a 320-bit permutation and is designed to provide excellent performance on both software and hardware platforms with minimal resource requirements.

Standardized in NIST SP 800-232 (August 2025).

See also: https://csrc.nist.gov/pubs/sp/800/232/ipd

Type:: Cryptographic hash function.

Output size:: 256 bits

Example:: // Output a 256-bit Ascon-Hash digest of a string

digestpp::ascon_hash hasher(256);

hasher.absorb("The quick brown fox jumps over the lazy dog");

std::cout << hasher.hexdigest() << '\n';

digestpp::hasher::hexdigest
std::string hexdigest() const
Return hex digest of absorbed data.
Definition hasher.hpp:372

Example output:: 23414503bf4bde7ad0e85aec94c22ae2d7cd807996b537f9564fc2974053f139

See also: hasher, ascon_xof

◆ ascon_xof

typedef hasher<detail::ascon_provider<detail::ascon_type::xof> > digestpp::ascon_xof

ASCON-XOF128 extendable output function.

Extendable output function from the Ascon family. Part of the NIST Lightweight Cryptography standard.

Ascon-XOF provides 128-bit security and can generate arbitrary-length output, making it suitable for key derivation, random number generation, and other applications in resource-constrained environments.