86 lines
3.4 KiB
C
86 lines
3.4 KiB
C
/*
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* This file is a part of Pcompress, a chunked parallel multi-
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* algorithm lossless compression and decompression program.
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*
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* Copyright (C) 2012-2013 Moinak Ghosh. All rights reserved.
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* Use is subject to license terms.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 3 of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this program.
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* If not, see <http://www.gnu.org/licenses/>.
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*
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* moinakg@belenix.org, http://moinakg.wordpress.com/
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*/
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/*-
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* Copyright 2009 Colin Percival
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file was originally written by Colin Percival as part of the Tarsnap
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* online backup system.
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*/
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#ifndef _CRYPTO_AESCTR_H_
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#define _CRYPTO_AESCTR_H_
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#include <stdint.h>
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#include <openssl/aes.h>
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typedef int (*setkey_func_ptr)(const unsigned char *userKey, const int bits, AES_KEY *key);
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typedef void (*encrypt_func_ptr)(const unsigned char *in, unsigned char *out, const AES_KEY *key);
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/**
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* crypto_aesctr_init(key, nonce):
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* Prepare to encrypt/decrypt data with AES in CTR mode, using the provided
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* expanded key and nonce. The key provided must remain valid for the
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* lifetime of the stream.
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*/
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struct crypto_aesctr * crypto_aesctr_init(AES_KEY *, uint64_t);
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/**
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* crypto_aesctr_stream(stream, inbuf, outbuf, buflen):
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* Generate the next ${buflen} bytes of the AES-CTR stream and xor them with
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* bytes from ${inbuf}, writing the result into ${outbuf}. If the buffers
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* ${inbuf} and ${outbuf} overlap, they must be identical.
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*/
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void crypto_aesctr_stream(struct crypto_aesctr *, const uint8_t *,
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uint8_t *, size_t);
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/**
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* crypto_aesctr_free(stream):
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* Free the provided stream object.
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*/
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void crypto_aesctr_free(struct crypto_aesctr *);
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#endif /* !_CRYPTO_AESCTR_H_ */
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