75 lines
1.8 KiB
C
75 lines
1.8 KiB
C
/*
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* This file Copyright (C) 2007-2014 Mnemosyne LLC
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*
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* It may be used under the GNU GPL versions 2 or 3
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* or any future license endorsed by Mnemosyne LLC.
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*
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*/
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#ifndef TR_ENCRYPTION_H
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#define TR_ENCRYPTION_H
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#ifndef __TRANSMISSION__
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#error only libtransmission should #include this header.
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#endif
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#include <inttypes.h>
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#include "crypto-utils.h"
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#include "utils.h" /* TR_GNUC_NULL_TERMINATED */
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/**
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*** @addtogroup peers
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*** @{
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**/
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enum
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{
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KEY_LEN = 96
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};
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/** @brief Holds state information for encrypted peer communications */
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typedef struct
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{
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tr_rc4_ctx_t dec_key;
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tr_rc4_ctx_t enc_key;
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tr_dh_ctx_t dh;
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uint8_t myPublicKey[KEY_LEN];
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tr_dh_secret_t mySecret;
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uint8_t torrentHash[SHA_DIGEST_LENGTH];
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bool isIncoming;
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bool torrentHashIsSet;
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}
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tr_crypto;
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/** @brief construct a new tr_crypto object */
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void tr_cryptoConstruct(tr_crypto* crypto, uint8_t const* torrentHash, bool isIncoming);
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/** @brief destruct an existing tr_crypto object */
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void tr_cryptoDestruct(tr_crypto* crypto);
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void tr_cryptoSetTorrentHash(tr_crypto* crypto, uint8_t const* torrentHash);
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uint8_t const* tr_cryptoGetTorrentHash(tr_crypto const* crypto);
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bool tr_cryptoHasTorrentHash(tr_crypto const* crypto);
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bool tr_cryptoComputeSecret(tr_crypto* crypto, uint8_t const* peerPublicKey);
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uint8_t const* tr_cryptoGetMyPublicKey(tr_crypto const* crypto, int* setme_len);
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void tr_cryptoDecryptInit(tr_crypto* crypto);
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void tr_cryptoDecrypt(tr_crypto* crypto, size_t buflen, void const* buf_in, void* buf_out);
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void tr_cryptoEncryptInit(tr_crypto* crypto);
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void tr_cryptoEncrypt(tr_crypto* crypto, size_t buflen, void const* buf_in, void* buf_out);
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bool tr_cryptoSecretKeySha1(tr_crypto const* crypto, void const* prepend_data, size_t prepend_data_size,
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void const* append_data, size_t append_data_size, uint8_t* hash);
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/* @} */
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#endif
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