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62 lines
1.8 KiB
C
62 lines
1.8 KiB
C
/*
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* Copyright (C) 2015 Freie Universität Berlin
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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/**
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* @ingroup sys_crypto
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* @{
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*
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* @file cbc.h
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* @brief Cipher block chaining mode of operation for block ciphers
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*
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* @author Freie Universitaet Berlin, Computer Systems & Telematics
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* @author Nico von Geyso <nico.geyso@fu-berlin.de>
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*/
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#ifndef CRYPTO_MODES_CBC_H
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#define CRYPTO_MODES_CBC_H
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#include "crypto/ciphers.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @brief Encrypt data of arbitrary length in cipher block chaining mode.
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*
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* @param cipher Already initialized cipher struct
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* @param iv 16 octet initialization vector. Must never be used more
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* than once for a given key.
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* @param input pointer to input data to encrypt
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* @param input_len length of the input data
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* @param output pointer to allocated memory for encrypted data. It has to
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* be of size data_len + BLOCK_SIZE - data_len % BLOCK_SIZE.
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*/
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int cipher_encrypt_cbc(cipher_t* cipher, uint8_t iv[16], uint8_t* input,
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size_t input_len, uint8_t* output);
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/**
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* @brief Decrypt encrypted data in cipher block chaining mode.
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*
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* @param cipher Already initialized cipher struct
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* @param iv 16 octet initialization vector.
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* @param input pointer to input data to decrypt
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* @param input_len length of the input data
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* @param output pointer to allocated memory for plaintext data. It has to
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* be of size input_len.
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*/
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int cipher_decrypt_cbc(cipher_t* cipher, uint8_t iv[16], uint8_t* input,
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size_t input_len, uint8_t* output);
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#ifdef __cplusplus
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}
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#endif
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#endif /* CRYPTO_MODES_CBC_H */
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