IETF ChaCha20 stream cipher. More...

#include <chacha.h>

Inheritance diagram for ChaChaTLS:

Public Types
typedef SymmetricCipherFinal< ConcretePolicyHolder< ChaChaTLS_Policy, AdditiveCipherTemplate<> >, ChaChaTLS_Info >	Encryption
	ChaCha-TLS Encryption.

typedef Encryption	Decryption
	ChaCha-TLS Decryption.

Public Types inherited from SymmetricCipherDocumentation
typedef SymmetricCipher	Encryption
	implements the SymmetricCipher interface

typedef SymmetricCipher	Decryption
	implements the SymmetricCipher interface

Additional Inherited Members
Static Public Member Functions inherited from ChaChaTLS_Info
static const char *	StaticAlgorithmName ()
	The algorithm name.

Static Public Member Functions inherited from FixedKeyLength< 32, SimpleKeyingInterface::UNIQUE_IV, 12 >
static size_t	StaticGetValidKeyLength (size_t keylength)
	The default key length for the algorithm provided by a static function.

Static Public Attributes inherited from FixedKeyLength< 32, SimpleKeyingInterface::UNIQUE_IV, 12 >
static const int	KEYLENGTH
	The default key length used by the algorithm provided as a constant.

static const int	MIN_KEYLENGTH
	The minimum key length used by the algorithm provided as a constant.

static const int	MAX_KEYLENGTH
	The maximum key length used by the algorithm provided as a constant.

static const int	DEFAULT_KEYLENGTH
	The default key length used by the algorithm provided as a constant.

static const int	IV_REQUIREMENT
	The default IV requirements for the algorithm provided as a constant.

static const int	IV_LENGTH
	The default IV length used by the algorithm provided as a constant.

Static Public Attributes inherited from FixedRounds< 20 >
static const int	ROUNDS
	The number of rounds for the algorithm provided as a constant.

Detailed Description

IETF ChaCha20 stream cipher.

This is the IETF's variant of Bernstein's ChaCha from RFC 8439. IETF ChaCha is called ChaChaTLS in the Crypto++ library. It is _slightly_ different from the Bernstein implementation. ChaCha-TLS can be used for cipher suites TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256, TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256, and TLS_DHE_RSA_WITH_CHACHA20_POLY1305_SHA256.