mirror of
https://github.com/transmission/transmission
synced 2025-02-20 21:26:53 +00:00
78 lines
2 KiB
C++
78 lines
2 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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// NB: crypto-test-ref.h needs this, so use it instead of #pragma once
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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 <array>
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#include <cinttypes> // uintX_t
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#include <cstddef>
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#include <optional>
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#include "crypto-utils.h"
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#include "tr-macros.h"
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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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struct tr_crypto
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{
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std::optional<tr_sha1_digest_t> torrent_hash;
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struct arc4_context* dec_key;
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struct arc4_context* 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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bool isIncoming;
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};
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/** @brief construct a new tr_crypto object */
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void tr_cryptoConstruct(tr_crypto* crypto, tr_sha1_digest_t const* torrent_hash, 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, tr_sha1_digest_t const& torrent_hash);
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std::optional<tr_sha1_digest_t> tr_cryptoGetTorrentHash(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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std::optional<tr_sha1_digest_t> tr_cryptoSecretKeySha1(
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tr_crypto const* crypto,
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void const* prepend_data,
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size_t prepend_data_size,
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void const* append_data,
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size_t append_data_size);
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/* @} */
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#endif // TR_ENCRYPTION_H
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