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https://github.com/outbackdingo/UltraGrid.git
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eabc29d956
* implemented CFB + switched to it because Debian currently does not include CTR mode * use CFB by default (decoder should still be able to decompress CTR if support is compiled in)
87 lines
3.2 KiB
C
87 lines
3.2 KiB
C
/**
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* @file crypto/openssl_decrypt.h
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* @author Martin Pulec <pulec@cesnet.cz>
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*/
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/*
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* Copyright (c) 2013-2014 CESNET, z. s. p. o.
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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, is permitted provided that the following conditions
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* are met:
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*
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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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*
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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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* 3. Neither the name of CESNET nor the names of its contributors may be
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* used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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* EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef OPENSSL_DECRYPT_H_
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#define OPENSSL_DECRYPT_H_
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#ifdef __cplusplus
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#include "crypto/openssl_encrypt.h" // enum openssl_mode
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#define OPENSSL_DECRYPT_ABI_VERSION 1
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struct openssl_decrypt;
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struct openssl_decrypt_info {
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/**
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* Creates decryption state
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*
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* @param[out] state state pointer
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* @param[in] passphrase key material (NULL-terminated)
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* @param[in] mode mode
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* @retval 0 ok
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* @retval <0 failure
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* @retval >0 state was not created
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*/
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int (*init)(struct openssl_decrypt **state,
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const char *passphrase);
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/**
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* Destroys decryption state
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*/
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void (*destroy)(struct openssl_decrypt *state);
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/**
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* Decrypts block of data
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*
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* @param[in] decrypt decrypt state
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* @param[in] ciphertext encrypted text
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* @param[in] ciphertext_len lenght of encrypted text
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* @param[in] aad Aditional Authenticated Data (see openssl_encrypt documentation)
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* @param[in] aad_len length of aad block
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* @param[out] plaintext otput plaintext
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* @retval 0 if checksum doesn't match
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* @retval >0 length of output plaintext
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*/
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int (*decrypt)(struct openssl_decrypt *decrypt,
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const char *ciphertext, int ciphertext_len,
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const char *aad, int aad_len,
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char *plaintext, enum openssl_mode mode);
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};
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#endif // __cplusplus
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#endif // OPENSSL_DECRYPT_H_
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