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Example.c
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Example.c
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//------------------------------------------------------------------------------
// INCLUDES
//------------------------------------------------------------------------------
#include <stdio.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdint.h>
#ifdef __APPLE__
#include <mach/mach.h>
#include <AudioToolbox/AudioUnit.h>
#include "SymbolResolve/Darwin/Macho.h"
#else
#include <sys/mman.h>
#include <unistd.h>
#include "SymbolResolve/Linux/Elf.h"
#endif
#include "utility/debug.h"
#include "utility/error.h"
#include "utility/utility.h"
#include "Hook/InlineHook.h"
#include "Memory/MemoryTracker.h"
#ifndef DEBUG_MODE
#ifdef BWSR_DEBUG
#undef BWSR_DEBUG
#endif
#define BWSR_DEBUG( LEVEL, ARGS... ) fprintf( stderr, ##ARGS );
#endif
//------------------------------------------------------------------------------
// HOOK FUNCTIONS AND HOOK TYPES
//------------------------------------------------------------------------------
#ifdef __APPLE__
typedef int32_t
( *AudioUnitProcess_t )
(
AudioUnit inUnit,
AudioUnitRenderActionFlags* __nullable ioActionFlags,
const AudioTimeStamp* inTimeStamp,
UInt32 inNumberFrames,
AudioBufferList* ioData
);
#endif
int hcreat( const char * files, mode_t modes )
{
BWSR_DEBUG( LOG_CRITICAL,
"SUCCESS! Caught creat()!: '%s'\n",
files );
__UNUSED( files, modes )
return -1;
}
int hprintf( const char* text, ... )
{
BWSR_DEBUG( LOG_CRITICAL,
"SUCCESS! Caught printf() with text: '%s'\n",
text );
__UNUSED( text )
return -1;
}
#ifdef __APPLE__
int32_t hAudioUnitProcess
(
AudioUnit inUnit,
AudioUnitRenderActionFlags* __nullable ioActionFlags,
const AudioTimeStamp* inTimeStamp,
UInt32 inNumberFrames,
AudioBufferList* ioData
)
{
BWSR_DEBUG( LOG_CRITICAL, "SUCCESS! Caught AudioUnitProcess()!\n" );
__UNUSED( inUnit,
ioActionFlags,
inTimeStamp,
inNumberFrames,
ioData )
return -1;
}
#endif
//------------------------------------------------------------------------------
// CODESIGN CALLBACKS
//------------------------------------------------------------------------------
void
BeforePageWriteCallbackFn
(
uintptr_t PageAddress
)
{
BWSR_DEBUG( LOG_CRITICAL, "PageAddress: %" PRIuPTR "\n", PageAddress );
__UNUSED( PageAddress )
// Uneeded for most people
}
void
AfterPageWriteCallbackFn
(
uintptr_t PageAddress
)
{
BWSR_DEBUG( LOG_ALERT, "PageAddress: %" PRIuPTR "\n", PageAddress );
__UNUSED( PageAddress )
// Rehash Code Page
// Rehash CDHash
// CodeDirectory stuff :)
}
//------------------------------------------------------------------------------
// EXAMPLES
//------------------------------------------------------------------------------
static
void
EXAMPLE_hooking_creat
(
void
)
{
BWSR_InlineHook( creat, hcreat, NULL, BeforePageWriteCallbackFn, AfterPageWriteCallbackFn );
BWSR_DEBUG( LOG_DEBUG, "Calling creat()\n" );
int fd = creat( "/var/mobile/creat_test_file1.txt", S_IRWXG | S_IRWXU | S_IRWXO );
if( 0 < fd )
{
BWSR_DEBUG( LOG_DEBUG, "FAILURE! creat() call went through!!!\n" );
close( fd );
}
BWSR_DEBUG( LOG_DEBUG, "Unhooking creat()\n" );
BWSR_DestroyHook( creat );
}
static
void
EXAMPLE_hooking_printf
(
void
)
{
void* oldprintf = NULL;
BWSR_InlineHook( printf, hprintf, &oldprintf, NULL, NULL );
printf( "Testing printf of an integer: %d", 1 );
if( NULL != oldprintf )
{
BWSR_DEBUG( LOG_CRITICAL, "Calling original printf(). Console should display!\n" );
if( EOF == ((__typeof(printf)*)oldprintf)( "Testing the original version of printf with integer: %d!\n", 1 ) )
{
BWSR_DEBUG( LOG_CRITICAL, "FAILURE: Original printf() did not write any bytes to console!\n" );
}
else {
BWSR_DEBUG( LOG_CRITICAL, "SUCCESS: Original printf() worked!\n" );
}
}
else {
BWSR_DEBUG( LOG_CRITICAL, "FAILURE: original printf() could not be called!\n" );
}
}
#if defined( __APPLE__ )
void
EXAMPLE_hooking_AudioUnitProcess
(
void
)
{
uintptr_t aup_address = 0;
AudioUnit inUnit = NULL;
AudioUnitRenderActionFlags* ioActionFlags = NULL;
const AudioTimeStamp* inTimeStamp = NULL;
UInt32 inNumberFrames = 0;
AudioBufferList* ioData = NULL;
BWSR_ResolveSymbol( "AudioUnitProcess", NULL, &aup_address );
BWSR_InlineHook( (void*)aup_address, hAudioUnitProcess, NULL, BeforePageWriteCallbackFn, AfterPageWriteCallbackFn );
AudioUnitProcess( inUnit, ioActionFlags, inTimeStamp, inNumberFrames, ioData );
}
#else
void
EXAMPLE_linux_SymbolResolve
(
void
)
{
uintptr_t open_address = 0;
BWSR_ResolveSymbol( "open", NULL, &open_address );
BWSR_DEBUG( LOG_CRITICAL, "open address: %p\n", open );
BWSR_DEBUG( LOG_CRITICAL, "resolved address: 0x%lx\n", open_address );
}
#endif
int main()
{
#ifndef DEBUG_MODE
fprintf( stderr, "Example was made without DEBUG printing. Output will be limited!\n" );
#endif
EXAMPLE_hooking_creat();
EXAMPLE_hooking_printf();
#if defined( __APPLE__ )
EXAMPLE_hooking_AudioUnitProcess();
#else
EXAMPLE_linux_SymbolResolve();
#endif
BWSR_DEBUG( LOG_CRITICAL, "Cleaning up all hooks\n" );
// Clean up all hooks
BWSR_DestroyAllHooks();
#if defined( DEBUG_MODE )
size_t leaks = MemoryTracker_CheckForMemoryLeaks();
BWSR_DEBUG( LOG_CRITICAL,
"%zu memory leaks found!\n",
leaks );
#endif
}