mirror of
https://github.com/transmission/transmission
synced 2024-12-28 02:27:41 +00:00
d424ed143e
On a way to factoring out OpenSSL support to a standalone file to ease
addition of other crypto libraries support in the future, move helpers
providing RC4 ciphering to crypto-utils.{c,h}. OpenSSL-related
functionality (RC4 context management) is moved to crypto-utils-openssl.c.
Add new tr_rc4_ctx_t type and functions to be implemented by crypto
backends:
* tr_rc4_new - allocate RC4 context,
* tr_rc4_free - free the context,
* tr_rc4_set_key - set cipher key,
* tr_rc4_process - cipher memory block.
97 lines
2.5 KiB
C
97 lines
2.5 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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* $Id$
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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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#include <openssl/dh.h> /* DH */
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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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DH * dh;
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uint8_t myPublicKey[KEY_LEN];
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uint8_t mySecret[KEY_LEN];
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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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bool mySecretIsSet;
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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, const uint8_t * 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, const uint8_t * torrentHash);
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const uint8_t* tr_cryptoGetTorrentHash (const tr_crypto * crypto);
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bool tr_cryptoHasTorrentHash (const tr_crypto * crypto);
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const uint8_t* tr_cryptoComputeSecret (tr_crypto * crypto,
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const uint8_t * peerPublicKey);
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const uint8_t* tr_cryptoGetMyPublicKey (const tr_crypto * crypto,
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int * setme_len);
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void tr_cryptoDecryptInit (tr_crypto * crypto);
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void tr_cryptoDecrypt (tr_crypto * crypto,
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size_t buflen,
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const void * buf_in,
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void * buf_out);
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void tr_cryptoEncryptInit (tr_crypto * crypto);
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void tr_cryptoEncrypt (tr_crypto * crypto,
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size_t buflen,
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const void * buf_in,
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void * buf_out);
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/* @} */
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/**
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*** @addtogroup utils Utilities
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*** @{
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**/
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/** @brief generate a SSHA password from its plaintext source */
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char* tr_ssha1 (const void * plaintext);
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/** @brief Validate a test password against the a ssha1 password */
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bool tr_ssha1_matches (const char * ssha1, const char * pass);
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/* @} */
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#endif
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