libdar::crypto_sym Class Reference

symetrical strong encryption, interface to grypt library More...

#include <crypto_sym.hpp>

Inherits libdar::crypto_module.

Collaboration diagram for libdar::crypto_sym:

Public Member Functions
	crypto_sym (const secu_string &password, const archive_version &reading_ver, crypto_algo algo, const std::string &salt, const infinint &iteration_count, hash_algo kdf_hash, bool use_pkcs5)
	crypto_sym (const crypto_sym &ref)
	crypto_sym (crypto_sym &&ref) noexcept
crypto_sym &	operator= (const crypto_sym &ref)
crypto_sym &	operator= (crypto_sym &&ref) noexcept
virtual U_32	encrypted_block_size_for (U_32 clear_block_size) override
virtual U_32	clear_block_allocated_size_for (U_32 clear_block_size) override
virtual U_32	encrypt_data (const infinint &block_num, const char *clear_buf, const U_32 clear_size, const U_32 clear_allocated, char *crypt_buf, U_32 crypt_size) override
virtual U_32	decrypt_data (const infinint &block_num, const char *crypt_buf, const U_32 crypt_size, char *clear_buf, U_32 clear_size) override
virtual std::unique_ptr< crypto_module >	clone () const override
const std::string &	get_salt () const
	give access to the calculated or provided salt

Static Public Member Functions
static size_t	max_key_len (crypto_algo algo)
	returns the max key length in octets for the given algorithm
static size_t	max_key_len_libdar (crypto_algo algo)
	returns the max key length in octets to use to compute a key from a user provided password
static bool	is_a_strong_password (crypto_algo algo, const secu_string &password)
	check whether the given password is reported as strong in regard to the given cipher

Private Member Functions
void	detruit ()
void	copy_from (const crypto_sym &ref)
void	move_from (crypto_sym &&ref)

Private Attributes
std::string	sel
	the salt

Detailed Description

symetrical strong encryption, interface to grypt library

Definition at line 66 of file crypto_sym.hpp.

Constructor & Destructor Documentation

crypto_sym()

libdar::crypto_sym::crypto_sym	(	const secu_string &	password,
		const archive_version &	reading_ver,
		crypto_algo	algo,
		const std::string &	salt,
		const infinint &	iteration_count,
		hash_algo	kdf_hash,
		bool	use_pkcs5
	)

Parameters

password	cipher password
reading_ver	archive format version
algo	ciphering algorithm to use
salt	if set empty, the salt is generated by the crypto_sym when use_pkcs5 is set to true, else it is not used
iteration_count	not used if use_pkcs5 is not set
kdf_hash	not used if use_pkcs5 is not set
use_pkcs5	must be set to true when password is human defined to add a key derivation

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

• crypto_sym.hpp