md5wrapper.cpp

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/*
 *      This is part of my wrapper-class to create
 *      a MD5 Hash from a string and a file.
 *
 *      This code is completly free, you 
 *      can copy it, modify it, or do 
 *      what ever you want with it.
 *
 *      Feb. 2005
 *      Benjamin Gr¨¹delbach
 */

//---------------------------------------------------------------------- 
//basic includes
#include <iostream>
#include <sstream>
using namespace std;

//my includes
#include "md5wrapper.h"
#include "md5.h"
#include <iomanip>


//---------privates--------------------------

/*
 * internal hash function, calling
 * the basic methods from md5.h
 */     
std::string md5wrapper::hashit(std::string text)
{
        MD5_CTX ctx;
        
        //init md5
        md5->MD5Init(&ctx);
        //update with our string
        md5->MD5Update(&ctx,
                 (unsigned char*)text.c_str(),
                 text.length());
        
        //create the hash
        unsigned char buff[16] = "";    
        md5->MD5Final((unsigned char*)buff,&ctx);

        //converte the hash to a string and return it
        return convToString(buff);      
}

/*
 * converts the numeric hash to
 * a valid std::string.
 * (based on Jim Howard's code;
 * http://www.codeproject.com/cpp/cmd5.asp)
 */
std::string md5wrapper::convToString(unsigned char *bytes)
{
        stringstream out;

        //out.setf ( ios::hex, ios::basefield );       // set hex as the basefield
        //out.width(2);

        for(int i=0; i<16; i++)
        {
                out << setfill('0') << setw(2) << hex << bytes[i];
        }       
        
        return out.str();
}

//---------publics--------------------------

//constructor
md5wrapper::md5wrapper()
{
        md5 = new MD5();
}


//destructor
md5wrapper::~md5wrapper()
{
        delete md5;
}

/*
 * creates a MD5 hash from
 * "text" and returns it as
 * string
 */     
std::string md5wrapper::getHashFromString(std::string text)
{
        return this->hashit(text); 
}




/*
 * EOF
 */