Exemplo n.º 1
0
	OsslRandom::OsslRandom() :
		initOk(false)
	{
		FILE *fp = 0;
		unsigned char buff[128];

		// TODO: make Windows Random Generator here
#ifdef WIN32
		HCRYPTPROV hCryptProv;
		if(!CryptAcquireContext(&hCryptProv, NULL, NULL, PROV_RSA_FULL, 0))
		{   
			return;
		}
		
		if(!CryptGenRandom(hCryptProv, sizeof(buff), buff))
		{
			return;
		}
		CryptReleaseContext(hCryptProv, 0);
#else
		fp = fopen("/dev/urandom", "r");
        
		if (fp)
		{
			size_t count = fread(buff, sizeof(unsigned char), sizeof(buff), fp);
			if (count != sizeof(buff)) throw DsrpException("Could not initialize random number generator - small seed");
			fclose(fp);
		}
		else throw DsrpException("Could not initialize random number generator");
#endif
		RAND_seed(buff, sizeof(buff));
		initOk = true;
	}
	bytes SrpClientAuthenticator::getSessionKey(bytes M2_from_server)
	{
		if (M2_from_server.size() == 0) throw DsrpException("SrpClientAuthenticator::getSessionKey: M2_from_server.size() == 0");
		if (M2_calculated.size() == 0) throw DsrpException("SrpClientAuthenticator::getSessionKey: M2_calculated.size() == 0");
		if (M2_from_server != M2_calculated) throw DsrpException("Authentification failed, bad password");
		return K;
	}
Exemplo n.º 3
0
	DatagramEncryptor::DatagramEncryptor(const bytes &encryptionKey, const bytes &IV, const bytes &macKey) :
		aesCtr(&IV[0], IV.size(), &encryptionKey[0], encryptionKey.size()),
		hmac(sha1, macKey)
	{
		if (macKey.size() < sha1.outputLen()) throw DsrpException("DatagramEncryptor::DatagramEncryptor: macKey not long enough");
		
	}
Exemplo n.º 4
0
	bytes OsslRandom::getRandom(unsigned int lenBytes)
	{
		if (!initOk) throw DsrpException("Could not get random number - PRNG not initialized");
		if (lenBytes <= 0) throw DsrpException("Could not get random number - size is zero or negative");
		unsigned char *r = (unsigned char *) malloc(lenBytes);
		if (r == NULL) throw DsrpException("Could not get random number - malloc() failed");
		int rval = RAND_bytes(r, lenBytes);
		
		if (rval != 1)
		{
			free(r);
			throw DsrpException("Could not get random number");
		}
		
		bytes out = Conversion::array2bytes(r, lenBytes);
		free(r);
		return out;
	}