///////////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2008-2010 Artyom Beilis (Tonkikh) <artyomtnk@yahoo.com>
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 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 Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
///////////////////////////////////////////////////////////////////////////////
#define CPPCMS_SOURCE
#include "base_encryptor.h"
#include <cppcms/base64.h>
#include <cppcms/cppcms_error.h>
#include <stdio.h>
#include <stdlib.h>
using namespace std;
namespace cppcms {
namespace sessions {
namespace impl {
base_encryptor::~base_encryptor()
{
}
std::string base_encryptor::to_binary(std::string const &k)
{
if(k.size() % 2 != 0) {
throw cppcms_error("Cipher should be encoded as hexadecimal number with even number of digits");
}
std::string key(k.size()/2,0);
for(unsigned i=0;i<k.size();i+=2) {
char buf[3];
if(!isxdigit(k[i]) || !isxdigit(k[i+1])) {
throw cppcms_error("Cipher should be encoded as hexadecimal 32 digits number");
}
buf[0]=k[i];
buf[1]=k[i+1];
buf[2]=0;
unsigned v;
sscanf(buf,"%x",&v);
key[i/2]=v;
}
return key;
}
string base_encryptor::base64_enc(vector<unsigned char> const &data)
{
size_t size=b64url::encoded_size(data.size());
vector<unsigned char> result(size,0);
if(data.size() > 0) {
b64url::encode(&data.front(),&data.front()+data.size(),&result.front());
}
return string(result.begin(),result.end());
}
void base_encryptor::base64_dec(std::string const &in,std::vector<unsigned char> &data)
{
int size=b64url::decoded_size(in.size());
if(size<=0) return;
data.resize(size);
unsigned char const *ptr=(unsigned char const *)in.data();
b64url::decode((unsigned char const *)ptr,ptr+in.size(),&data.front());
}
} // impl
} // sessions
} // cppcms
