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libdar::crypto_sym Class Reference
Private

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

`#include <crypto_sym.hpp>`

Inherits libdar::crypto_module.

## 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() [1/3]

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

## crypto_sym() [2/3]

libdar::crypto_sym::crypto_sym | ( | const crypto_sym & | ref | ) |

inline

Definition at line 77 of file crypto_sym.hpp.

## crypto_sym() [3/3]

libdar::crypto_sym::crypto_sym | ( | crypto_sym && | ref | ) |

inlinenoexcept

Definition at line 78 of file crypto_sym.hpp.

## ~crypto_sym()

virtual libdar::crypto_sym::~crypto_sym | ( |  | ) |

inlinevirtualnoexcept

Definition at line 81 of file crypto_sym.hpp.

## Member Function Documentation

## copy_from()

void libdar::crypto_sym::copy_from | ( | const crypto_sym & | ref | ) |

inlineprivate

Definition at line 189 of file crypto_sym.hpp.

## detruit()

void libdar::crypto_sym::detruit | ( |  | ) |

inlineprivate

Definition at line 188 of file crypto_sym.hpp.

## get_salt()

const std::string & libdar::crypto_sym::get_salt | ( |  | ) | const

inline

give access to the calculated or provided salt

Definition at line 100 of file crypto_sym.hpp.

References sel.

## move_from()

void libdar::crypto_sym::move_from | ( | crypto_sym && | ref | ) |

inlineprivate

Definition at line 190 of file crypto_sym.hpp.

## operator=() [1/2]

crypto_sym & libdar::crypto_sym::operator= | ( | const crypto_sym & | ref | ) |

inline

Definition at line 79 of file crypto_sym.hpp.

## operator=() [2/2]

crypto_sym & libdar::crypto_sym::operator= | ( | crypto_sym && | ref | ) |

inlinenoexcept

Definition at line 80 of file crypto_sym.hpp.

## Member Data Documentation

## sel

std::string libdar::crypto_sym::sel

private

the salt

Definition at line 113 of file crypto_sym.hpp.

Referenced by get_salt().

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

- crypto_sym.hpp