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/*
Copyright (C) 2014 Carl Hetherington <cth@carlh.net>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <iomanip>
#include <openssl/md5.h>
#include "md5_digester.h"
#include "safe_stringstream.h"
using std::string;
using std::hex;
using std::setfill;
using std::setw;
MD5Digester::MD5Digester ()
{
MD5_Init (&_context);
}
MD5Digester::~MD5Digester ()
{
get ();
}
void
MD5Digester::add (void const * data, size_t size)
{
MD5_Update (&_context, data, size);
}
void
MD5Digester::add (string const & s)
{
add (s.c_str (), s.length ());
}
string
MD5Digester::get () const
{
if (!_digest) {
unsigned char digest[MD5_DIGEST_LENGTH];
MD5_Final (digest, &_context);
SafeStringStream s;
for (int i = 0; i < MD5_DIGEST_LENGTH; ++i) {
s << hex << setfill('0') << setw(2) << ((int) digest[i]);
}
_digest = s.str ();
}
return _digest.get ();
}
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