// md5.hpp

/*    Copyright 2009 10gen Inc.
 *
 *    This program is free software: you can redistribute it and/or  modify
 *    it under the terms of the GNU Affero General Public License, version 3,
 *    as published by the Free Software Foundation.
 *
 *    This program is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *    GNU Affero General Public License for more details.
 *
 *    You should have received a copy of the GNU Affero General Public License
 *    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 *    As a special exception, the copyright holders give permission to link the
 *    code of portions of this program with the OpenSSL library under certain
 *    conditions as described in each individual source file and distribute
 *    linked combinations including the program with the OpenSSL library. You
 *    must comply with the GNU Affero General Public License in all respects
 *    for all of the code used other than as permitted herein. If you modify
 *    file(s) with this exception, you may extend this exception to your
 *    version of the file(s), but you are not obligated to do so. If you do not
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 */

#pragma once

#include "mongo/util/md5.h"

#include <sstream>
#include <string>
#include <string.h>

namespace mongo {

    typedef unsigned char md5digest[16];

    inline void md5(const void *buf, int nbytes, md5digest digest) {
        md5_state_t st;
        md5_init(&st);
        md5_append(&st, (const md5_byte_t *) buf, nbytes);
        md5_finish(&st, digest);
    }

    inline void md5(const char *str, md5digest digest) {
        md5(str, strlen(str), digest);
    }
    
    inline std::string digestToString( md5digest digest ){
        static const char * letters = "0123456789abcdef";
        std::stringstream ss;
        for ( int i=0; i<16; i++){
            unsigned char c = digest[i];
            ss << letters[ ( c >> 4 ) & 0xf ] << letters[ c & 0xf ];
        }
        return ss.str();
    }

    inline std::string md5simpledigest( const void* buf, int nbytes){
        md5digest d;
        md5( buf, nbytes , d );
        return digestToString( d );
    }

    inline std::string md5simpledigest( const std::string& s ){
        return md5simpledigest(s.data(), s.size());
    }


} // namespace mongo