ChaCha20Aligned Class Reference

ChaCha20 cipher that only operates on multiples of 64 bytes. More...

#include <chacha20.h>

Public Member Functions
	ChaCha20Aligned ()
	ChaCha20Aligned (const unsigned char *key32)
	Initialize a cipher with specified 32-byte key. More...
void	SetKey32 (const unsigned char *key32)
	set 32-byte key. More...
void	SetIV (uint64_t iv)
	set the 64-bit nonce. More...
void	Seek64 (uint64_t pos)
	set the 64bit block counter (pos seeks to byte position 64*pos). More...
void	Keystream64 (unsigned char *c, size_t blocks)
	outputs the keystream of size <64*blocks> into More...
void	Crypt64 (const unsigned char *input, unsigned char *output, size_t blocks)
	enciphers the message <input> of length <64*blocks> and write the enciphered representation into <output> Used for encryption and decryption (XOR) More...

Private Attributes
uint32_t	input [12]

Detailed Description

ChaCha20 cipher that only operates on multiples of 64 bytes.

Definition at line 15 of file chacha20.h.

Constructor & Destructor Documentation

ChaCha20Aligned() [1/2]

ChaCha20Aligned::ChaCha20Aligned

(

)

Definition at line 40 of file chacha20.cpp.

ChaCha20Aligned() [2/2]

ChaCha20Aligned::ChaCha20Aligned

(

const unsigned char *

key32

)

Initialize a cipher with specified 32-byte key.

Definition at line 45 of file chacha20.cpp.

Here is the call graph for this function:

Member Function Documentation

Crypt64()

void ChaCha20Aligned::Crypt64 ( const unsigned char *  input, unsigned char *  output, size_t  blocks  )

inline

enciphers the message <input> of length <64*blocks> and write the enciphered representation into <output> Used for encryption and decryption (XOR)

Definition at line 159 of file chacha20.cpp.

Here is the call graph for this function:

Here is the caller graph for this function:

Keystream64()

void ChaCha20Aligned::Keystream64 ( unsigned char *  c, size_t  blocks  )

inline

outputs the keystream of size <64*blocks> into

Definition at line 62 of file chacha20.cpp.

Here is the call graph for this function:

Here is the caller graph for this function:

Seek64()

void ChaCha20Aligned::Seek64

(

uint64_t

pos

)

set the 64bit block counter (pos seeks to byte position 64*pos).

Definition at line 56 of file chacha20.cpp.

Here is the caller graph for this function:

SetIV()

void ChaCha20Aligned::SetIV

(

uint64_t

iv

)

set the 64-bit nonce.

Definition at line 50 of file chacha20.cpp.

Here is the caller graph for this function:

SetKey32()

void ChaCha20Aligned::SetKey32

(

const unsigned char *

key32

)

set 32-byte key.

Definition at line 24 of file chacha20.cpp.

Here is the call graph for this function:

Here is the caller graph for this function:

Member Data Documentation

input

uint32_t ChaCha20Aligned::input[12]

private

Definition at line 18 of file chacha20.h.

---

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

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