rotbase

#include <stdio.h>#include <stdlib.h>#include <cmath>#include <string>using namespace std;std::string RotN( char* szText, int N );std::string base64( const char *lpszData, unsigned long nDataLen );int main( int argc, char* argv[] ){	char* buffer = {0};	printf("argv[1] -> %s\n", argv[1]);			printf("RotN(base64(argv[1], strlen(argv[1])), N) -> %s%s",argv[2],RotN((char*)base64((const char*)argv[1], strlen(argv[1])).c_str(), atoi(argv[2])).c_str());		return 0;}std::string RotN( char* szText, int N ){	std::string szBuf;	char cap, byte;	for(int i = 0; i < (int)strlen(szText); i++)    {		byte = szText[i];		cap = byte & 32;		byte &= ~cap;		byte = ((byte >= 'A') && (byte <= 'Z') ? ((byte - 'A' + N) % 26 + 'A') : byte) | cap;		szBuf += byte;    }	szBuf += '\0';		return szBuf;}std::string base64( const char *lpszData, unsigned long nDataLen ){	static char Base64CharTable[] =	"ABCDEFGHIJKLMNOPQRSTUVWXYZ"	"abcdefghijklmnopqrstuvwxyz"	"0123456789+/";	// reserve memory	std::string sBase64;	sBase64.reserve( ( nDataLen ) );		// encode	unsigned long nLinePos = 0;	while( nDataLen > 0 )	{		unsigned long n;		// get 24 bits		// - get bytes available		unsigned long nBytesCount;		if( nDataLen >= 3 )			nBytesCount = 3;		else if( nDataLen == 2 )			nBytesCount	= 2;		else if( nDataLen == 1 )			nBytesCount	= 1;		unsigned long nBase64Blocks = ceil( ( nBytesCount * 8.0 / 6.0 ) );		// - read		char Bytes[ 3 ];		for( n = 0; n < nBytesCount; n++ )			Bytes[ n ] = lpszData[ n ];		lpszData += nBytesCount;		nDataLen -= nBytesCount;		// encode		char Base64TableIndex[ 4 ];		Base64TableIndex[ 0 ] = ( Bytes[0] & 0xfc ) >> 2;		Base64TableIndex[ 1 ] = ( ( Bytes[ 0 ] & 0x03 ) << 4 ) + ( ( Bytes[ 1 ] & 0xf0 ) >> 4 );		Base64TableIndex[ 2 ] = ( ( Bytes[ 1 ] & 0x0f ) << 2 ) + ( ( Bytes[ 2 ] & 0xc0 ) >> 6 );		Base64TableIndex[ 3 ] = Bytes[ 2 ] & 0x3f;		for( n = 0; n < nBase64Blocks; n++ )		{			sBase64.append( 1, Base64CharTable[ Base64TableIndex[ n ] ] );			nLinePos++;		}		// add padding		for( n = nBase64Blocks; n < 4; n++ )			sBase64.append( 1, '=' );	}	return sBase64;}