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#ifndef __OPKELE_UTIL_H
#define __OPKELE_UTIL_H
#include <time.h>
#include <string>
#include <vector>
#include <openssl/bn.h>
#include <openssl/dh.h>
namespace opkele {
using std::string;
using std::vector;
/**
* @brief opkele utils namespace
*/
namespace util {
/**
* Convenience class encapsulating SSL BIGNUM object for the purpose of
* automatical freeing.
*/
class bignum_t {
public:
BIGNUM *_bn;
bignum_t() : _bn(0) { }
bignum_t(BIGNUM *bn) : _bn(bn) { }
~bignum_t() throw() { if(_bn) BN_free(_bn); }
bignum_t& operator=(BIGNUM *bn) { if(_bn) BN_free(_bn); _bn = bn; return *this; }
operator const BIGNUM*(void) const { return _bn; }
operator BIGNUM*(void) { return _bn; }
};
/**
* Convenience clas encapsulating SSL DH object for the purpose of
* automatic freeing.
*/
class dh_t {
public:
DH *_dh;
dh_t() : _dh(0) { }
dh_t(DH *dh) : _dh(dh) { }
~dh_t() throw() { if(_dh) DH_free(_dh); }
dh_t& operator=(DH *dh) { if(_dh) DH_free(_dh); _dh = dh; return *this; }
operator const DH*(void) const { return _dh; }
operator DH*(void) { return _dh; }
DH* operator->() { return _dh; }
const DH* operator->() const { return _dh; }
};
/**
* Convert base64-encoded SSL BIGNUM to internal representation.
* @param b64 base64-encoded number
* @return SSL BIGNUM
* @throw failed_conversion in case of error
*/
BIGNUM *base64_to_bignum(const string& b64);
/**
* Convert decimal representation to SSL BIGNUM.
* @param dec decimal representation
* @return resulting BIGNUM
* @throw failed_conversion in case of error
*/
BIGNUM *dec_to_bignum(const string& dec);
/**
* Convert SSL BIGNUM data to base64 encoded string.
* @param bn BIGNUM
* @return base64encoded string
*/
string bignum_to_base64(const BIGNUM *bn);
/**
* Convert internal time representation to w3c format
* @param t internal representation
* @return w3c time
* @throw failed_conversion in case of error
*/
string time_to_w3c(time_t t);
/**
* Convert W3C time representation to internal time_t
* @param w w3c representation
* @return converted time
* @throw failed_conversion in case of error
*/
time_t w3c_to_time(const string& w);
/**
* Encode string to the representation suitable for using in URL.
* @param str string to encode
* @return encoded string
* @throw failed_conversion in case of failure
*/
string url_encode(const string& str);
/**
* Convert number to string
* @param l number
* @return string representation
* @throw failed_conversion in case of failure
*/
string long_to_string(long l);
/**
* Convert string to number
* @param s string, containing the number
* @return the number
* @throw failed_conversion in case of failure
*/
long string_to_long(const string& s);
/**
* Encode binary data using base64.
* @param data pointer to binary data
* @param length length of data
* @return encoded data
*/
string encode_base64(const void *data,size_t length);
/**
* Decode binary data from base64 representation.
* @param data base64-encoded data
* @param rv container for decoded binary
*/
void decode_base64(const string& data,vector<unsigned char>& rv);
}
}
#endif /* __OPKELE_UTIL_H */
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