keepass::Salsa20Cipher Class Reference

Salsa20 stream cipher implementation. More...

#include <cipher.hh>

Public Member Functions
	Salsa20Cipher (const uint8_t *key)
	Constructs a Salsa20 cipher with a zero nonce.
	Salsa20Cipher (const uint8_t *key, const std::array< uint8_t, 8 > &init_vec)
	Constructs a Salsa20 cipher with a given 64-bit nonce.
	~Salsa20Cipher ()
	Zeroizes the cipher state holding the key.
void	Process (const std::array< uint8_t, 64 > &src, std::array< uint8_t, 64 > &dst)
	Encrypts or decrypts a single 64-byte block.

Detailed Description

Salsa20 stream cipher implementation.

Constructor & Destructor Documentation

Salsa20Cipher() [1/2]

keepass::Salsa20Cipher::Salsa20Cipher ( const uint8_t *  key )

inlineexplicit

Constructs a Salsa20 cipher with a zero nonce.

Parameters

key	The 256-bit (32-byte) encryption key.

Salsa20Cipher() [2/2]

keepass::Salsa20Cipher::Salsa20Cipher	(	const uint8_t *	key,
		const std::array< uint8_t, 8 > &	init_vec
	)

Constructs a Salsa20 cipher with a given 64-bit nonce.

Parameters

key	The 256-bit (32-byte) encryption key.
init_vec	The 8-byte nonce (initialization vector).

Member Function Documentation

Process()

void keepass::Salsa20Cipher::Process	(	const std::array< uint8_t, 64 > &	src,
		std::array< uint8_t, 64 > &	dst
	)

Encrypts or decrypts a single 64-byte block.

Because Salsa20 is a stream cipher, encryption and decryption are the same XOR operation. The internal counter is advanced after each call.

Parameters

src	The 64-byte input block (plaintext or ciphertext).
dst	The 64-byte output block (ciphertext or plaintext).

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

• cipher.hh