Merge pull request #4400

4eedf4f make RandAddSeed() use OPENSSL_cleanse() (Philip Kaufmann)
6354935 move rand functions from util to new random.h/.cpp (Philip Kaufmann)
001a53d add GetRandBytes() as wrapper for RAND_bytes() (Philip Kaufmann)

src/Makefile.am

@@ -91,6 +91,7 @@ BITCOIN_CORE_H = \
   noui.h \
   pow.h \
   protocol.h \
+  random.h \
   rpcclient.h \
   rpcprotocol.h \
   rpcserver.h \
@@ -197,14 +198,15 @@ libbitcoin_common_a_SOURCES = \
 # backward-compatibility objects and their sanity checks are linked.
 libbitcoin_util_a_CPPFLAGS = $(BITCOIN_INCLUDES)
 libbitcoin_util_a_SOURCES = \
+  compat/glibc_sanity.cpp \
+  compat/glibcxx_sanity.cpp \
   chainparamsbase.cpp \
+  random.cpp \
   rpcprotocol.cpp \
   sync.cpp \
   uint256.cpp \
   util.cpp \
   version.cpp \
-  compat/glibc_sanity.cpp \
-  compat/glibcxx_sanity.cpp \
   $(BITCOIN_CORE_H)
 
 if GLIBC_BACK_COMPAT

src/addrman.h

@@ -7,6 +7,7 @@
 
 #include "netbase.h"
 #include "protocol.h"
+#include "random.h"
 #include "sync.h"
 #include "timedata.h"
 #include "util.h"
@@ -16,8 +17,6 @@
 #include <stdint.h>
 #include <vector>
 
-#include <openssl/rand.h>
-
 /** Extended statistics about a CAddress */
 class CAddrInfo : public CAddress
 {
@@ -384,7 +383,7 @@ public:
     CAddrMan() : vRandom(0), vvTried(ADDRMAN_TRIED_BUCKET_COUNT, std::vector<int>(0)), vvNew(ADDRMAN_NEW_BUCKET_COUNT, std::set<int>())
     {
          nKey.resize(32);
-         RAND_bytes(&nKey[0], 32);
+         GetRandBytes(&nKey[0], 32);
 
          nIdCount = 0;
          nTried = 0;

src/chainparams.cpp

@@ -6,6 +6,7 @@
 #include "chainparams.h"
 
 #include "assert.h"
+#include "random.h"
 #include "util.h"
 
 #include <boost/assign/list_of.hpp>

src/key.cpp

@@ -1,11 +1,11 @@
-// Copyright (c) 2009-2013 The Bitcoin developers
+// Copyright (c) 2009-2014 The Bitcoin developers
 // Distributed under the MIT/X11 software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 #include "key.h"
 
 #include "crypto/sha2.h"
-#include <openssl/rand.h>
+#include "random.h"
 
 #ifdef USE_SECP256K1
 #include <secp256k1.h>
@@ -412,7 +412,7 @@ bool CKey::CheckSignatureElement(const unsigned char *vch, int len, bool half) {
 
 void CKey::MakeNewKey(bool fCompressedIn) {
     do {
-        RAND_bytes(vch, sizeof(vch));
+        GetRandBytes(vch, sizeof(vch));
     } while (!Check(vch));
     fValid = true;
     fCompressed = fCompressedIn;
@@ -745,5 +745,3 @@ bool ECC_InitSanityCheck() {
     return true;
 #endif
 }
-
-

src/main.cpp

@@ -4381,7 +4381,7 @@ bool SendMessages(CNode* pto, bool fSendTrickle)
         if (pingSend) {
             uint64_t nonce = 0;
             while (nonce == 0) {
-                RAND_bytes((unsigned char*)&nonce, sizeof(nonce));
+                GetRandBytes((unsigned char*)&nonce, sizeof(nonce));
             }
             pto->fPingQueued = false;
             pto->nPingUsecStart = GetTimeMicros();

src/net.cpp

@@ -555,7 +555,7 @@ void CNode::PushVersion()
     int64_t nTime = (fInbound ? GetAdjustedTime() : GetTime());
     CAddress addrYou = (addr.IsRoutable() && !IsProxy(addr) ? addr : CAddress(CService("0.0.0.0",0)));
     CAddress addrMe = GetLocalAddress(&addr);
-    RAND_bytes((unsigned char*)&nLocalHostNonce, sizeof(nLocalHostNonce));
+    GetRandBytes((unsigned char*)&nLocalHostNonce, sizeof(nLocalHostNonce));
     if (fLogIPs)
         LogPrint("net", "send version message: version %d, blocks=%d, us=%s, them=%s, peer=%d\n", PROTOCOL_VERSION, nBestHeight, addrMe.ToString(), addrYou.ToString(), id);
     else
@@ -1961,7 +1961,7 @@ bool CAddrDB::Write(const CAddrMan& addr)
 {
     // Generate random temporary filename
     unsigned short randv = 0;
-    RAND_bytes((unsigned char *)&randv, sizeof(randv));
+    GetRandBytes((unsigned char*)&randv, sizeof(randv));
     std::string tmpfn = strprintf("peers.dat.%04x", randv);
 
     // serialize addresses, checksum data up to that point, then append csum

src/net.h

@@ -13,6 +13,7 @@
 #include "mruset.h"
 #include "netbase.h"
 #include "protocol.h"
+#include "random.h"
 #include "sync.h"
 #include "uint256.h"
 #include "util.h"
@@ -26,7 +27,6 @@
 
 #include <boost/foreach.hpp>
 #include <boost/signals2/signal.hpp>
-#include <openssl/rand.h>
 
 class CAddrMan;
 class CBlockIndex;

src/random.cpp

@@ -0,0 +1,139 @@
+// Copyright (c) 2009-2010 Satoshi Nakamoto
+// Copyright (c) 2009-2014 The Bitcoin developers
+// Distributed under the MIT/X11 software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include "random.h"
+
+#ifdef WIN32
+#include "compat.h" // for Windows API
+#endif
+#include "util.h" // for LogPrint()
+
+#ifndef WIN32
+#include <sys/time.h>
+#endif
+
+#include <openssl/crypto.h>
+#include <openssl/err.h>
+#include <openssl/rand.h>
+
+static inline int64_t GetPerformanceCounter()
+{
+    int64_t nCounter = 0;
+#ifdef WIN32
+    QueryPerformanceCounter((LARGE_INTEGER*)&nCounter);
+#else
+    timeval t;
+    gettimeofday(&t, NULL);
+    nCounter = (int64_t)(t.tv_sec * 1000000 + t.tv_usec);
+#endif
+    return nCounter;
+}
+
+void RandAddSeed()
+{
+    // Seed with CPU performance counter
+    int64_t nCounter = GetPerformanceCounter();
+    RAND_add(&nCounter, sizeof(nCounter), 1.5);
+    OPENSSL_cleanse((void*)&nCounter, sizeof(nCounter));
+}
+
+void RandAddSeedPerfmon()
+{
+    RandAddSeed();
+
+    // This can take up to 2 seconds, so only do it every 10 minutes
+    static int64_t nLastPerfmon;
+    if (GetTime() < nLastPerfmon + 10 * 60)
+        return;
+    nLastPerfmon = GetTime();
+
+#ifdef WIN32
+    // Don't need this on Linux, OpenSSL automatically uses /dev/urandom
+    // Seed with the entire set of perfmon data
+    std::vector <unsigned char> vData(250000,0);
+    long ret = 0;
+    unsigned long nSize = 0;
+    const size_t nMaxSize = 10000000; // Bail out at more than 10MB of performance data
+    while (true)
+    {
+        nSize = vData.size();
+        ret = RegQueryValueExA(HKEY_PERFORMANCE_DATA, "Global", NULL, NULL, begin_ptr(vData), &nSize);
+        if (ret != ERROR_MORE_DATA || vData.size() >= nMaxSize)
+            break;
+        vData.resize(std::max((vData.size()*3)/2, nMaxSize)); // Grow size of buffer exponentially
+    }
+    RegCloseKey(HKEY_PERFORMANCE_DATA);
+    if (ret == ERROR_SUCCESS)
+    {
+        RAND_add(begin_ptr(vData), nSize, nSize/100.0);
+        OPENSSL_cleanse(begin_ptr(vData), nSize);
+        LogPrint("rand", "%s: %lu bytes\n", __func__, nSize);
+    } else {
+        static bool warned = false; // Warn only once
+        if (!warned)
+        {
+            LogPrintf("%s: Warning: RegQueryValueExA(HKEY_PERFORMANCE_DATA) failed with code %i\n", __func__, ret);
+            warned = true;
+        }
+    }
+#endif
+}
+
+bool GetRandBytes(unsigned char *buf, int num)
+{
+    if (RAND_bytes(buf, num) != 1) {
+        LogPrintf("%s: OpenSSL RAND_bytes() failed with error: %s\n", __func__, ERR_error_string(ERR_get_error(), NULL));
+        return false;
+    }
+    return true;
+}
+
+uint64_t GetRand(uint64_t nMax)
+{
+    if (nMax == 0)
+        return 0;
+
+    // The range of the random source must be a multiple of the modulus
+    // to give every possible output value an equal possibility
+    uint64_t nRange = (std::numeric_limits<uint64_t>::max() / nMax) * nMax;
+    uint64_t nRand = 0;
+    do {
+        GetRandBytes((unsigned char*)&nRand, sizeof(nRand));
+    } while (nRand >= nRange);
+    return (nRand % nMax);
+}
+
+int GetRandInt(int nMax)
+{
+    return GetRand(nMax);
+}
+
+uint256 GetRandHash()
+{
+    uint256 hash;
+    GetRandBytes((unsigned char*)&hash, sizeof(hash));
+    return hash;
+}
+
+uint32_t insecure_rand_Rz = 11;
+uint32_t insecure_rand_Rw = 11;
+void seed_insecure_rand(bool fDeterministic)
+{
+    // The seed values have some unlikely fixed points which we avoid.
+    if(fDeterministic)
+    {
+        insecure_rand_Rz = insecure_rand_Rw = 11;
+    } else {
+        uint32_t tmp;
+        do {
+            GetRandBytes((unsigned char*)&tmp, 4);
+        } while(tmp == 0 || tmp == 0x9068ffffU);
+        insecure_rand_Rz = tmp;
+        do {
+            GetRandBytes((unsigned char*)&tmp, 4);
+        } while(tmp == 0 || tmp == 0x464fffffU);
+        insecure_rand_Rw = tmp;
+    }
+}

src/random.h

@@ -0,0 +1,49 @@
+// Copyright (c) 2009-2010 Satoshi Nakamoto
+// Copyright (c) 2009-2014 The Bitcoin developers
+// Distributed under the MIT/X11 software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#ifndef BITCOIN_RANDOM_H
+#define BITCOIN_RANDOM_H
+
+#include "uint256.h"
+
+#include <stdint.h>
+
+/**
+ * Seed OpenSSL PRNG with additional entropy data
+ */
+void RandAddSeed();
+void RandAddSeedPerfmon();
+
+/**
+ * Functions to gather random data via the OpenSSL PRNG
+ */
+bool GetRandBytes(unsigned char *buf, int num);
+uint64_t GetRand(uint64_t nMax);
+int GetRandInt(int nMax);
+uint256 GetRandHash();
+
+/**
+ * Seed insecure_rand using the random pool.
+ * @param Deterministic Use a determinstic seed
+ */
+void seed_insecure_rand(bool fDeterministic = false);
+
+/**
+ * MWC RNG of George Marsaglia
+ * This is intended to be fast. It has a period of 2^59.3, though the
+ * least significant 16 bits only have a period of about 2^30.1.
+ *
+ * @return random value
+ */
+extern uint32_t insecure_rand_Rz;
+extern uint32_t insecure_rand_Rw;
+static inline uint32_t insecure_rand(void)
+{
+    insecure_rand_Rz = 36969 * (insecure_rand_Rz & 65535) + (insecure_rand_Rz >> 16);
+    insecure_rand_Rw = 18000 * (insecure_rand_Rw & 65535) + (insecure_rand_Rw >> 16);
+    return (insecure_rand_Rw << 16) + insecure_rand_Rz;
+}
+
+#endif // BITCOIN_RANDOM_H

src/rpcserver.cpp

@@ -532,7 +532,7 @@ void StartRPCThreads()
          (mapArgs["-rpcuser"] == mapArgs["-rpcpassword"])) && Params().RequireRPCPassword())
     {
         unsigned char rand_pwd[32];
-        RAND_bytes(rand_pwd, 32);
+        GetRandBytes(rand_pwd, 32);
         string strWhatAmI = "To use bitcoind";
         if (mapArgs.count("-server"))
             strWhatAmI = strprintf(_("To use the %s option"), "\"-server\"");

src/script.cpp

@@ -5,13 +5,14 @@
 
 #include "script.h"
 
+#include "crypto/ripemd160.h"
+#include "crypto/sha1.h"
+#include "crypto/sha2.h"
 #include "core.h"
 #include "hash.h"
 #include "key.h"
 #include "keystore.h"
-#include "crypto/sha1.h"
+#include "random.h"
-#include "crypto/sha2.h"
-#include "crypto/ripemd160.h"
 #include "sync.h"
 #include "uint256.h"
 #include "util.h"
@@ -1097,7 +1098,6 @@ uint256 SignatureHash(const CScript &scriptCode, const CTransaction& txTo, unsig
 // Valid signature cache, to avoid doing expensive ECDSA signature checking
 // twice for every transaction (once when accepted into memory pool, and
 // again when accepted into the block chain)
-
 class CSignatureCache
 {
 private:

src/test/canonical_tests.cpp

@@ -6,12 +6,11 @@
 // Unit tests for canonical signatures
 //
 
-
-
-#include "script.h"
-#include "util.h"
 #include "data/sig_noncanonical.json.h"
 #include "data/sig_canonical.json.h"
+#include "random.h"
+#include "script.h"
+#include "util.h"
 
 #include <boost/foreach.hpp>
 #include <boost/test/unit_test.hpp>
@@ -21,7 +20,6 @@
 using namespace std;
 using namespace json_spirit;
 
-
 // In script_tests.cpp
 extern Array read_json(const std::string& jsondata);
 

src/test/crypto_tests.cpp

@@ -5,6 +5,7 @@
 #include "crypto/ripemd160.h"
 #include "crypto/sha1.h"
 #include "crypto/sha2.h"
+#include "random.h"
 #include "util.h"
 
 #include <vector>

src/test/mruset_tests.cpp

@@ -4,6 +4,7 @@
 
 #include "mruset.h"
 
+#include "random.h"
 #include "util.h"
 
 #include <set>

src/test/sighash_tests.cpp

@@ -2,15 +2,16 @@
 // Distributed under the MIT/X11 software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
-#include <boost/test/unit_test.hpp>
+#include "data/sighash.json.h"
+#include "main.h"
+#include "random.h"
+#include "serialize.h"
+#include "util.h"
+#include "version.h"
+
 #include <iostream>
 
-#include "main.h"
+#include <boost/test/unit_test.hpp>
-#include "util.h"
-#include "serialize.h"
-#include "version.h"
-#include "data/sighash.json.h"
-
 #include "json/json_spirit_reader_template.h"
 #include "json/json_spirit_utils.h"
 #include "json/json_spirit_writer_template.h"
@@ -211,4 +212,3 @@ BOOST_AUTO_TEST_CASE(sighash_from_data)
     }
 }
 BOOST_AUTO_TEST_SUITE_END()
-

src/test/skiplist_tests.cpp

@@ -2,11 +2,13 @@
 // Distributed under the MIT/X11 software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
-#include <boost/test/unit_test.hpp>
-#include <vector>
 #include "main.h"
+#include "random.h"
 #include "util.h"
 
+#include <vector>
+
+#include <boost/test/unit_test.hpp>
 
 #define SKIPLIST_LENGTH 300000
 
@@ -98,4 +100,3 @@ BOOST_AUTO_TEST_CASE(getlocator_test)
 }
 
 BOOST_AUTO_TEST_SUITE_END()
-

src/test/test_bitcoin.cpp

@@ -4,9 +4,8 @@
 
 #define BOOST_TEST_MODULE Bitcoin Test Suite
 
-
-
 #include "main.h"
+#include "random.h"
 #include "txdb.h"
 #include "ui_interface.h"
 #include "util.h"
@@ -89,4 +88,3 @@ bool ShutdownRequested()
 {
   return false;
 }
-

src/test/util_tests.cpp

@@ -4,6 +4,7 @@
 
 #include "util.h"
 
+#include "random.h"
 #include "sync.h"
 
 #include <stdint.h>

src/util.cpp

@@ -6,6 +6,7 @@
 #include "util.h"
 
 #include "chainparamsbase.h"
+#include "random.h"
 #include "sync.h"
 #include "uint256.h"
 #include "version.h"
@@ -141,90 +142,6 @@ public:
 }
 instance_of_cinit;
 
-
-
-
-
-
-
-
-void RandAddSeed()
-{
-    // Seed with CPU performance counter
-    int64_t nCounter = GetPerformanceCounter();
-    RAND_add(&nCounter, sizeof(nCounter), 1.5);
-    memset(&nCounter, 0, sizeof(nCounter));
-}
-
-void RandAddSeedPerfmon()
-{
-    RandAddSeed();
-
-    // This can take up to 2 seconds, so only do it every 10 minutes
-    static int64_t nLastPerfmon;
-    if (GetTime() < nLastPerfmon + 10 * 60)
-        return;
-    nLastPerfmon = GetTime();
-
-#ifdef WIN32
-    // Don't need this on Linux, OpenSSL automatically uses /dev/urandom
-    // Seed with the entire set of perfmon data
-    std::vector <unsigned char> vData(250000,0);
-    long ret = 0;
-    unsigned long nSize = 0;
-    const size_t nMaxSize = 10000000; // Bail out at more than 10MB of performance data
-    while (true)
-    {
-        nSize = vData.size();
-        ret = RegQueryValueExA(HKEY_PERFORMANCE_DATA, "Global", NULL, NULL, begin_ptr(vData), &nSize);
-        if (ret != ERROR_MORE_DATA || vData.size() >= nMaxSize)
-            break;
-        vData.resize(std::max((vData.size()*3)/2, nMaxSize)); // Grow size of buffer exponentially
-    }
-    RegCloseKey(HKEY_PERFORMANCE_DATA);
-    if (ret == ERROR_SUCCESS)
-    {
-        RAND_add(begin_ptr(vData), nSize, nSize/100.0);
-        OPENSSL_cleanse(begin_ptr(vData), nSize);
-        LogPrint("rand", "%s: %lu bytes\n", __func__, nSize);
-    } else {
-        static bool warned = false; // Warn only once
-        if (!warned)
-        {
-            LogPrintf("%s: Warning: RegQueryValueExA(HKEY_PERFORMANCE_DATA) failed with code %i\n", __func__, ret);
-            warned = true;
-        }
-    }
-#endif
-}
-
-uint64_t GetRand(uint64_t nMax)
-{
-    if (nMax == 0)
-        return 0;
-
-    // The range of the random source must be a multiple of the modulus
-    // to give every possible output value an equal possibility
-    uint64_t nRange = (std::numeric_limits<uint64_t>::max() / nMax) * nMax;
-    uint64_t nRand = 0;
-    do
-        RAND_bytes((unsigned char*)&nRand, sizeof(nRand));
-    while (nRand >= nRange);
-    return (nRand % nMax);
-}
-
-int GetRandInt(int nMax)
-{
-    return GetRand(nMax);
-}
-
-uint256 GetRandHash()
-{
-    uint256 hash;
-    RAND_bytes((unsigned char*)&hash, sizeof(hash));
-    return hash;
-}
-
 // LogPrintf() has been broken a couple of times now
 // by well-meaning people adding mutexes in the most straightforward way.
 // It breaks because it may be called by global destructors during shutdown.
@@ -1192,27 +1109,6 @@ void SetMockTime(int64_t nMockTimeIn)
     nMockTime = nMockTimeIn;
 }
 
-uint32_t insecure_rand_Rz = 11;
-uint32_t insecure_rand_Rw = 11;
-void seed_insecure_rand(bool fDeterministic)
-{
-    //The seed values have some unlikely fixed points which we avoid.
-    if(fDeterministic)
-    {
-        insecure_rand_Rz = insecure_rand_Rw = 11;
-    } else {
-        uint32_t tmp;
-        do {
-            RAND_bytes((unsigned char*)&tmp, 4);
-        } while(tmp == 0 || tmp == 0x9068ffffU);
-        insecure_rand_Rz = tmp;
-        do {
-            RAND_bytes((unsigned char*)&tmp, 4);
-        } while(tmp == 0 || tmp == 0x464fffffU);
-        insecure_rand_Rw = tmp;
-    }
-}
-
 string FormatVersion(int nVersion)
 {
     if (nVersion%100 == 0)

src/util.h

@@ -90,8 +90,6 @@ inline void MilliSleep(int64_t n)
 #endif
 }
 
-
-
 extern std::map<std::string, std::string> mapArgs;
 extern std::map<std::string, std::vector<std::string> > mapMultiArgs;
 extern bool fDebug;
@@ -103,8 +101,6 @@ extern bool fLogTimestamps;
 extern bool fLogIPs;
 extern volatile bool fReopenDebugLog;
 
-void RandAddSeed();
-void RandAddSeedPerfmon();
 void SetupEnvironment();
 
 /* Return true if log accepts specified category */
@@ -187,23 +183,12 @@ boost::filesystem::path GetSpecialFolderPath(int nFolder, bool fCreate = true);
 #endif
 boost::filesystem::path GetTempPath();
 void ShrinkDebugFile();
-int GetRandInt(int nMax);
-uint64_t GetRand(uint64_t nMax);
-uint256 GetRandHash();
 int64_t GetTime();
 void SetMockTime(int64_t nMockTimeIn);
 std::string FormatFullVersion();
 std::string FormatSubVersion(const std::string& name, int nClientVersion, const std::vector<std::string>& comments);
 void runCommand(std::string strCommand);
 
-
-
-
-
-
-
-
-
 inline std::string i64tostr(int64_t n)
 {
     return strprintf("%d", n);
@@ -289,19 +274,6 @@ inline std::string HexStr(const T& vch, bool fSpaces=false)
  */
 std::string FormatParagraph(const std::string in, size_t width=79, size_t indent=0);
 
-inline int64_t GetPerformanceCounter()
-{
-    int64_t nCounter = 0;
-#ifdef WIN32
-    QueryPerformanceCounter((LARGE_INTEGER*)&nCounter);
-#else
-    timeval t;
-    gettimeofday(&t, NULL);
-    nCounter = (int64_t) t.tv_sec * 1000000 + t.tv_usec;
-#endif
-    return nCounter;
-}
-
 inline int64_t GetTimeMillis()
 {
     return (boost::posix_time::ptime(boost::posix_time::microsec_clock::universal_time()) -
@@ -370,28 +342,6 @@ bool SoftSetArg(const std::string& strArg, const std::string& strValue);
  */
 bool SoftSetBoolArg(const std::string& strArg, bool fValue);
 
-/**
- * MWC RNG of George Marsaglia
- * This is intended to be fast. It has a period of 2^59.3, though the
- * least significant 16 bits only have a period of about 2^30.1.
- *
- * @return random value
- */
-extern uint32_t insecure_rand_Rz;
-extern uint32_t insecure_rand_Rw;
-static inline uint32_t insecure_rand(void)
-{
-    insecure_rand_Rz = 36969 * (insecure_rand_Rz & 65535) + (insecure_rand_Rz >> 16);
-    insecure_rand_Rw = 18000 * (insecure_rand_Rw & 65535) + (insecure_rand_Rw >> 16);
-    return (insecure_rand_Rw << 16) + insecure_rand_Rz;
-}
-
-/**
- * Seed insecure_rand using the random pool.
- * @param Deterministic Use a determinstic seed
- */
-void seed_insecure_rand(bool fDeterministic=false);
-
 /**
  * Timing-attack-resistant comparison.
  * Takes time proportional to length

src/wallet.cpp

@@ -12,7 +12,6 @@
 #include "timedata.h"
 
 #include <boost/algorithm/string/replace.hpp>
-#include <openssl/rand.h>
 
 using namespace std;
 
@@ -384,13 +383,15 @@ bool CWallet::EncryptWallet(const SecureString& strWalletPassphrase)
     RandAddSeedPerfmon();
 
     vMasterKey.resize(WALLET_CRYPTO_KEY_SIZE);
-    RAND_bytes(&vMasterKey[0], WALLET_CRYPTO_KEY_SIZE);
+    if (!GetRandBytes(&vMasterKey[0], WALLET_CRYPTO_KEY_SIZE))
+        return false;
 
     CMasterKey kMasterKey;
-
     RandAddSeedPerfmon();
+
     kMasterKey.vchSalt.resize(WALLET_CRYPTO_SALT_SIZE);
-    RAND_bytes(&kMasterKey.vchSalt[0], WALLET_CRYPTO_SALT_SIZE);
+    if (!GetRandBytes(&kMasterKey.vchSalt[0], WALLET_CRYPTO_SALT_SIZE))
+        return false;
 
     CCrypter crypter;
     int64_t nStartTime = GetTimeMillis();