Cipher.hpp File Reference

#include "common.hpp"
#include "NetBuffer.hpp"
#include <openssl/evp.h>

Include dependency graph for Cipher.hpp:

This graph shows which files directly or indirectly include this file:

Namespaces
	EPS
	EPS::Cipher
	Cipher takes care of calling OpenSSL to encrypt and decrypt NetBuffer objects.

Macros
#define	ENC_MODE_UNCHANGED   -1
	Definition needed when calling OpenSSL functions such as EVP_CipherInit_ex() More...
#define	ENC_MODE_DECRYPT   0
	Definition needed when calling OpenSSL functions such as EVP_CipherInit_ex() More...
#define	ENC_MODE_ENCRYPT   1
	Definition needed when calling OpenSSL functions such as EVP_CipherInit_ex() More...

Functions
void	EPS::Cipher::reset (void)
	Reset OpenSSL. More...
void	EPS::Cipher::initialize (EPS::StrMap &configuration)
	Initialize OpenSSL ciphers. More...
void	EPS::Cipher::get_cipher_key_and_iv (EPS::StrMap &configuration)
	Get and parse the key and iv from configuration. More...
EPS::NetBuffer *	EPS::Cipher::encrypt (EPS::NetBuffer &buffer)
	Encrypt a network buffer. Return a pointer to the newly-encrypted buffer. The original buffer remains untouched. More...
EPS::NetBuffer *	EPS::Cipher::decrypt (EPS::NetBuffer &buffer)
	Decrypt a network buffer. Return a pointer to the newly-decrypted buffer. The original buffer remains untouched. More...
EPS::NetBuffer *	EPS::Cipher::decrypt_header (EPS::NetBuffer &buffer)
	Decrypt only the first few bytes ("header") of a network buffer. Return a pointer to the newly-decrypted buffer. The original buffer remains untouched. More...

Variables
std::array< uint8_t, 32 >	EPS::Cipher::key
	OpenSSL: 256-bit encryption/decryption key. More...
std::array< uint8_t, 16 >	EPS::Cipher::iv
	OpenSSL: 128-bit encryption/decryption iv. More...
const EVP_CIPHER *	EPS::Cipher::cipher = nullptr
	OpenSSL: cipher to use for encryption/decryption. More...
EVP_CIPHER_CTX *	EPS::Cipher::decrypt_ctx = nullptr
	OpenSSL: ctx needed for decryption. More...
EVP_CIPHER_CTX *	EPS::Cipher::encrypt_ctx = nullptr
	OpenSSL: ctx needed for encryption. More...
size_t	EPS::Cipher::size_of_keys_in_bytes = 0
	OpenSSL: size of the cipher key. More...
size_t	EPS::Cipher::size_of_iv_in_bytes = 0
	OpenSSL: size of the cipher initialization vector. More...
std::string	EPS::Cipher::name = "<invalid>"
	OpenSSL: text name of the cipher in use. More...
std::string	EPS::Cipher::hash = "<invalid>"
	nonsense text string to help validate encryption key and iv More...

Macro Definition Documentation

ENC_MODE_DECRYPT

#define ENC_MODE_DECRYPT   0

Definition needed when calling OpenSSL functions such as EVP_CipherInit_ex()

ENC_MODE_ENCRYPT

#define ENC_MODE_ENCRYPT   1

Definition needed when calling OpenSSL functions such as EVP_CipherInit_ex()

ENC_MODE_UNCHANGED

#define ENC_MODE_UNCHANGED   -1

Definition needed when calling OpenSSL functions such as EVP_CipherInit_ex()