Streamline subdirectories for ripple_basics

modules/ripple_basics/utility/ripple_RandomNumbers.cpp

@@ -0,0 +1,108 @@
+//------------------------------------------------------------------------------
+/*
+	Copyright (c) 2011-2013, OpenCoin, Inc.
+
+	Permission to use, copy, modify, and/or distribute this software for any
+	purpose with  or without fee is hereby granted,  provided that the above
+	copyright notice and this permission notice appear in all copies.
+
+	THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+	WITH  REGARD  TO  THIS  SOFTWARE  INCLUDING  ALL  IMPLIED  WARRANTIES OF
+	MERCHANTABILITY  AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+	ANY SPECIAL,  DIRECT, INDIRECT,  OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+	WHATSOEVER  RESULTING  FROM LOSS OF USE, DATA OR PROFITS,  WHETHER IN AN
+	ACTION OF CONTRACT, NEGLIGENCE  OR OTHER TORTIOUS ACTION, ARISING OUT OF
+	OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+//==============================================================================
+
+void getRand(unsigned char *buf, int num)
+{
+#ifdef PURIFY
+	memset(buf, 0, num);
+#endif
+	if (RAND_bytes(buf, num) != 1)
+	{
+		assert(false);
+		throw std::runtime_error("Entropy pool not seeded");
+	}
+}
+
+//------------------------------------------------------------------------------
+
+// VFALCO: TODO replace WIN32 macro with VFLIB_WIN32
+
+#ifdef WIN32
+
+bool AddSystemEntropy()
+{ // Get entropy from the Windows crypto provider
+	char name[512], rand[128];
+	DWORD count = 500;
+	HCRYPTPROV cryptoHandle;
+
+	if (!CryptGetDefaultProvider(PROV_RSA_FULL, NULL, CRYPT_MACHINE_DEFAULT, name, &count))
+	{
+#ifdef DEBUG
+		std::cerr << "Unable to get default crypto provider" << std::endl;
+#endif
+		return false;
+	}
+
+	if (!CryptAcquireContext(&cryptoHandle, NULL, name, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT | CRYPT_SILENT))
+	{
+#ifdef DEBUG
+		std::cerr << "Unable to acquire crypto provider" << std::endl;
+#endif
+		return false;
+	}
+
+	if(!CryptGenRandom(cryptoHandle, 128, reinterpret_cast<BYTE*>(rand)))
+	{
+#ifdef DEBUG
+		std::cerr << "Unable to get entropy from crypto provider" << std::endl;
+#endif
+		CryptReleaseContext(cryptoHandle, 0);
+		return false;
+	}
+
+	CryptReleaseContext(cryptoHandle, 0);
+	RAND_seed(rand, 128);
+
+	return true;
+}
+
+#else
+
+#include <iostream>
+#include <fstream>
+
+#include <openssl/rand.h>
+
+bool AddSystemEntropy()
+{
+	char rand[128];
+	std::ifstream reader;
+
+	reader.open("/dev/urandom", std::ios::in | std::ios::binary);
+	if (!reader.is_open())
+	{
+#ifdef DEBUG
+		std::cerr << "Unable to open random source" << std::endl;
+#endif
+		return false;
+	}
+	reader.read(rand, 128);
+
+	int bytesRead = reader.gcount();
+	if (bytesRead == 0)
+	{
+#ifdef DEBUG
+		std::cerr << "Unable to read from random source" << std::endl;
+#endif
+		return false;
+	}
+	RAND_seed(rand, bytesRead);
+	return bytesRead >= 64;
+}
+
+#endif