ChaCha20 Class Reference

A PRNG class for ChaCha20. More...

#include <chacha20.h>

Inheritance diagram for ChaCha20:

Collaboration diagram for ChaCha20:

Public Types
typedef SymmetricCipherFinal< ConcretePolicyHolder< ChaCha_Policy< 20 >, AdditiveCipherTemplate<> >, ChaCha_Info< 20 > >	Encryption
typedef Encryption	Decryption
Public Types inherited from SymmetricCipherDocumentation
typedef SymmetricCipher	Encryption
	implements the SymmetricCipher interface More...
typedef SymmetricCipher	Decryption
	implements the SymmetricCipher interface More...

Public Member Functions
	ChaCha20 ()
	ChaCha20 (const unsigned char *key, size_t keylen)
void	SetKey (const unsigned char *key, size_t keylen)
void	SetIV (uint64_t iv)
void	Seek (uint64_t pos)
void	Output (unsigned char *output, size_t bytes)
Public Member Functions inherited from ChaCha_Info< 20 >
CRYPTOPP_STATIC_CONSTEXPR const char *	StaticAlgorithmName ()
Public Member Functions inherited from VariableKeyLength< 32, 16, 32, 16, SimpleKeyingInterface::UNIQUE_IV, 8 >
CRYPTOPP_STATIC_CONSTEXPR size_t CRYPTOPP_API	StaticGetValidKeyLength (size_t keylength)
	The minimum key length used by the algorithm provided as a constant. More...

Private Attributes
uint32_t	input [16]

Detailed Description

A PRNG class for ChaCha20.

ChaCha20 stream cipher.

See also

ChaCha, a variant of Salsa20 (2008.01.28).

Bernstein and ECRYPT's ChaCha is slightly different from the TLS working group's implementation 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.

Since

Crypto++ 5.6.4

Definition at line 12 of file chacha20.h.

Member Typedef Documentation

typedef Encryption ChaCha20::Decryption

Definition at line 86 of file chacha.h.

typedef SymmetricCipherFinal<ConcretePolicyHolder<ChaCha_Policy<20>, AdditiveCipherTemplate<> >, ChaCha_Info<20> > ChaCha20::Encryption

Definition at line 85 of file chacha.h.

Constructor & Destructor Documentation

ChaCha20::ChaCha20

(

)

Definition at line 52 of file chacha20.cpp.

ChaCha20::ChaCha20	(	const unsigned char *	key,
		size_t	keylen
	)

Definition at line 57 of file chacha20.cpp.

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Member Function Documentation

void ChaCha20::Output	(	unsigned char *	output,
		size_t	bytes
	)

Definition at line 74 of file chacha20.cpp.

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void ChaCha20::Seek

(

uint64_t

pos

)

Definition at line 68 of file chacha20.cpp.

void ChaCha20::SetIV

(

uint64_t

iv

)

Definition at line 62 of file chacha20.cpp.

void ChaCha20::SetKey	(	const unsigned char *	key,
		size_t	keylen
	)

Definition at line 24 of file chacha20.cpp.

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Member Data Documentation

uint32_t ChaCha20::input[16]

private

Definition at line 15 of file chacha20.h.

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The documentation for this class was generated from the following files:

• src/crypto/chacha20.h
• src/cryptopp/chacha.h
• src/crypto/chacha20.cpp