transmission/libtransmission/crypto.h

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/*
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* This file Copyright (C) 2007-2008 Charles Kerr <charles@rebelbase.com>
*
* This file is licensed by the GPL version 2. Works owned by the
* Transmission project are granted a special exemption to clause 2(b)
* so that the bulk of its code can remain under the MIT license.
* This exemption does not extend to derived works not owned by
* the Transmission project.
*
* $Id$
*/
#ifndef TR_ENCRYPTION_H
#define TR_ENCRYPTION_H
#include <inttypes.h>
/**
***
**/
struct evbuffer;
typedef struct tr_crypto tr_crypto;
/**
***
**/
tr_crypto* tr_cryptoNew( const uint8_t * torrentHash,
int isIncoming );
void tr_cryptoFree( tr_crypto * crypto );
/**
***
**/
void tr_cryptoSetTorrentHash( tr_crypto * crypto,
const uint8_t * torrentHash );
const uint8_t* tr_cryptoGetTorrentHash( const tr_crypto * crypto );
int tr_cryptoHasTorrentHash( const tr_crypto * crypto );
/**
***
**/
const uint8_t* tr_cryptoComputeSecret( tr_crypto * crypto,
const uint8_t * peerPublicKey );
const uint8_t* tr_cryptoGetMyPublicKey( const tr_crypto * crypto,
int * setme_len );
void tr_cryptoDecryptInit( tr_crypto * crypto );
void tr_cryptoDecrypt( tr_crypto * crypto,
size_t buflen,
const void * buf_in,
void * buf_out );
/**
***
**/
void tr_cryptoEncryptInit( tr_crypto * crypto );
void tr_cryptoEncrypt( tr_crypto * crypto,
size_t buflen,
const void * buf_in,
void * buf_out );
void tr_sha1( uint8_t * setme,
const void * content1,
int content1_len,
... );
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/** Returns a random number in the range of [0...n) */
int tr_cryptoRandInt( int n );
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/** Returns a vaguely random number in the range of [0...n).
This is faster -- BUT WEAKER -- than tr_cryptoRandInt()
and should only be used when tr_cryptoRandInt() is too
slow, and NEVER in sensitive cases */
int tr_cryptoWeakRandInt( int n );
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/** Fills a buffer with random bytes */
void tr_cryptoRandBuf( unsigned char *buf,
size_t len );
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#endif