/*
The software in this package is distributed under the GNU General
Public License version 2 (with a special exception described below).

A copy of GNU General Public License (GPL) is included in this distribution,
in the file COPYING.GPL.

As a special exception, if other files instantiate templates or use macros
or inline functions from this file, or you compile this file and link it
with other works to produce a work based on this file, this file
does not by itself cause the resulting work to be covered
by the GNU General Public License.

However the source code for this file must still be made available
in accordance with section (3) of the GNU General Public License.

This exception does not invalidate any other reasons why a work based
on this file might be covered by the GNU General Public License.
*/
/**
   Hashing functions based upon openssl.

   @copyright Intra2net AG
*/

#ifndef CRYPTO_HXX
#define CRYPTO_HXX


#if (__GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96))
using namespace std;
#endif

#include <openssl/evp.h>
#include <boost/shared_array.hpp>
#include <boost/shared_ptr.hpp>

namespace I2n {

enum algorithm { NONE=0, MD5=1, SHA1=2, SHA256=8, SHA384=9, SHA512=10 };

// output: hex encoded hash
string hash_data(string data, algorithm algo);

// output: raw binary hash
string hash_data_raw(string data, algorithm algo);

// hash data in 64kB blocks
string hash_file(string filename, algorithm algo);

string encode_hex(string data);

string encode_hex(char *data, unsigned int size);

typedef boost::shared_array<char> char_arr;

typedef boost::shared_array<unsigned char> uchar_arr;

typedef boost::shared_ptr<EVP_MD_CTX> EVP_MD_CTX_Ptr;
}; // eo I2n namespace

#endif /* [CRYPTO_HXX] */