From 7ccb819f867493f8ec202ea3b39c94c198c64584 Mon Sep 17 00:00:00 2001 From: JustSomePwner Date: Thu, 30 Aug 2018 14:01:54 +0200 Subject: first --- enc_file/source.cpp | 40 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 enc_file/source.cpp (limited to 'enc_file/source.cpp') diff --git a/enc_file/source.cpp b/enc_file/source.cpp new file mode 100644 index 0000000..9056764 --- /dev/null +++ b/enc_file/source.cpp @@ -0,0 +1,40 @@ +#include +#include + +int main( ) { + uint8_t key{ }; + std::cin >> key; + printf( "key: %d", key ); + + auto file = CreateFileA( "./enc.dll", GENERIC_READ, 0, 0, OPEN_ALWAYS, 0, 0 ); + if( !file ) return 0; + + auto size = GetFileSize( file, 0 ); + if( !size ) { + CloseHandle( file ); + return 0; + } + + uint8_t* data = ( uint8_t* )( malloc( size ) ); + if( !ReadFile( file, data, size, 0, 0 ) ) { + CloseHandle( file ); + free( data ); + return 0; + } + + CloseHandle( file ); + + for( size_t i{ }; i < size; ++i ) { + data[ i ] ^= key; + } + + data[ 0 ] = 'c'; + data[ 1 ] = 'd'; + + FILE* f; + fopen_s( &f, "./out.dll", "wb" ); + fwrite( data, 1, size, f ); + fclose( f ); + + return 0; +} \ No newline at end of file -- cgit v1.2.3