Function RandomString

lib/base/tlsutility.cpp:1013–1046

}

String RandomString(int length)
{
	auto *bytes = new unsigned char[length];

	/* Ensure that password generation is atomic. RAND_bytes is not thread-safe
	 * in OpenSSL < 1.1.0.
	 */
	std::unique_lock<std::mutex> lock(l_RandomMutex);

	if (!RAND_bytes(bytes, length)) {
		delete [] bytes;

		char errbuf[256];
		ERR_error_string_n(ERR_peek_error(), errbuf, sizeof errbuf);

		Log(LogCritical, "SSL")
			<< "Error for RAND_bytes: " << ERR_peek_error() << ", \"" << errbuf << "\"";
		BOOST_THROW_EXCEPTION(openssl_error()
			<< boost::errinfo_api_function("RAND_bytes")
			<< errinfo_openssl_error(ERR_peek_error()));
	}

	lock.unlock();

	auto *output = new char[length * 2 + 1];
	for (int i = 0; i < length; i++)
		sprintf(output + 2 * i, "%02x", bytes[i]);

	String result = output;
	delete [] bytes;
	delete [] output;

	return result;
}

String BinaryToHex(const unsigned char* data, size_t length) {
	static const char hexdigits[] = "0123456789abcdef";