61 lines
1.2 KiB
C++
61 lines
1.2 KiB
C++
|
#include "opensslrandomdevice.h"
|
||
|
|
#include "io/cryptoexception.h"
|
||
|
|
|
||
|
|
#include <c++utilities/conversion/binaryconversion.h>
|
||
|
|
|
||
|
|
#include <openssl/rand.h>
|
||
|
|
#include <openssl/err.h>
|
||
|
|
|
||
|
|
#include <string>
|
||
|
|
|
||
|
|
using namespace std;
|
||
|
|
|
||
|
|
namespace Util {
|
||
|
|
|
||
|
|
/*!
|
||
|
|
* \namespace QtGui
|
||
|
|
* \brief Contains all miscellaneous utility functions.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*!
|
||
|
|
* \class OpenSslRandomDevice
|
||
|
|
* \brief Provides a random device using the OpenSSL function RAND_bytes().
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*!
|
||
|
|
* \brief Constructs a new random device.
|
||
|
|
*/
|
||
|
|
OpenSslRandomDevice::OpenSslRandomDevice()
|
||
|
|
{}
|
||
|
|
|
||
|
|
/*!
|
||
|
|
* \brief Generates a new random number.
|
||
|
|
*/
|
||
|
|
uint32 OpenSslRandomDevice::operator ()() const {
|
||
|
|
unsigned char buf[4];
|
||
|
|
if(RAND_bytes(buf, sizeof(buf))) {
|
||
|
|
return ConversionUtilities::LE::toUInt32(reinterpret_cast<char *>(buf));
|
||
|
|
} else {
|
||
|
|
string msg;
|
||
|
|
unsigned long errorCode = ERR_get_error();
|
||
|
|
while(errorCode != 0) {
|
||
|
|
if(!msg.empty()) {
|
||
|
|
msg += "\n";
|
||
|
|
}
|
||
|
|
msg += ERR_error_string(errorCode, 0);
|
||
|
|
errorCode = ERR_get_error();
|
||
|
|
}
|
||
|
|
throw Io::CryptoException(msg);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/*!
|
||
|
|
* \brief Returns the status.
|
||
|
|
*/
|
||
|
|
bool OpenSslRandomDevice::status() const
|
||
|
|
{
|
||
|
|
return RAND_status();
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|