ChaCha20 Class Reference

#include <chacha20.h>

Public Member Functions
	ChaCha20 ()
	ChaCha20 (const unsigned char *key, size_t keylen)
void	SetKey (const unsigned char *key, size_t keylen)
	set key with flexible keylength; 256bit recommended */ More...
void	SetIV (uint64_t iv)
void	Seek (uint64_t pos)
void	Keystream (unsigned char *c, size_t bytes)
void	Crypt (const unsigned char *input, unsigned char *output, size_t bytes)

Private Attributes
uint32_t	input [16]

Detailed Description

A class for ChaCha20 256-bit stream cipher developed by Daniel J. Bernstein https://cr.yp.to/chacha/chacha-20080128.pdf

Constructor & Destructor Documentation

ChaCha20() [1/2]

ChaCha20::ChaCha20

(

)

ChaCha20() [2/2]

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

Member Function Documentation

Crypt()

void ChaCha20::Crypt	(	const unsigned char *	input,
		unsigned char *	output,
		size_t	bytes
	)

enciphers the message <input> of length <bytes> and write the enciphered representation into <output> Used for encryption and decryption (XOR)

Keystream()

void ChaCha20::Keystream	(	unsigned char *	c,
		size_t	bytes
	)

outputs the keystream of size <bytes> into

Seek()

void ChaCha20::Seek

(

uint64_t

pos

)

SetIV()

void ChaCha20::SetIV

(

uint64_t

iv

)

SetKey()

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

set key with flexible keylength; 256bit recommended */

Member Data Documentation

input

uint32_t ChaCha20::input[16]

private

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

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