This publication will enable investigative journalists, forensic experts and the general public to better identify and understand covert CIA infrastructure components.
Source code published in this series contains software designed to run on servers controlled by the CIA. Like WikiLeaks' earlier Vault7 series, the material published by WikiLeaks does not contain 0-days or similar security vulnerabilities which could be repurposed by others.
/** * @file * Encryption/decryption module documentation file. */ /** * @addtogroup encdec_module Encryption/decryption module * * The Encryption/decryption module provides encryption/decryption functions. * One can differtiate between symmetric and asymetric algorithms; the * symmetric ones are mostly used for message confidentiality and the asymmetric * ones for key exchange and message integrity. * Some symmetric algorithms provide different block cipher modes, mainly * Electronic Code Book (ECB) which is used for short (64-bit) messages and * Cipher Block Chaining (CBC) which provides the structure needed for longer * messages. In addition the Cipher Feedback Mode (CFB-128) stream cipher mode * is implemented for specific algorithms. * * Sometimes the same functions are used for encryption and decryption. * The following algorithms are provided: * - Symmetric: * - AES (see \c aes_crypt_ecb(), \c aes_crypt_cbc() and \c aes_crypt_cfb128()). * - ARCFOUR (see \c arc4_crypt()). * - Camellia (see \c camellia_crypt_ecb(), \c camellia_crypt_cbc() and \c camellia_crypt_cfb128()). * - DES/3DES (see \c des_crypt_ecb(), \c des_crypt_cbc(), \c des3_crypt_ecb() * and \c des3_crypt_cbc()). * - XTEA (see \c xtea_crypt_ecb()). * - Asymmetric: * - Diffie-Hellman-Merkle (see \c dhm_read_public(), \c dhm_make_public() * and \c dhm_calc_secret()). * - RSA (see \c rsa_public() and \c rsa_private()). * * This module provides encryption/decryption which can be used to provide * secrecy. * It also provides asymmetric key functions which can be used for * confidentiality, integrity, authentication and non-repudiation. */