move rand functions from util to new random.h/.cpp

1 files changed, 1 insertions, 108 deletions

diff --git a/src/util.cpp b/src/util.cpp
index 8f2a1bd73d..ce31619eca 100644
--- a/src/util.cpp
+++ b/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"
@@ -69,7 +70,6 @@
 #include <boost/program_options/detail/config_file.hpp>
 #include <boost/program_options/parsers.hpp>
 #include <openssl/crypto.h>
-#include <openssl/err.h>
 #include <openssl/rand.h>
 
 // Work around clang compilation problem in Boost 1.46:
@@ -142,92 +142,6 @@ public:
 }
 instance_of_cinit;
 
-bool GetRandBytes(unsigned char *buf, int num)
-{
-    if (RAND_bytes(buf, num) == 0) {
-        LogPrint("rand", "%s : OpenSSL RAND_bytes() failed with error: %s\n", __func__, ERR_error_string(ERR_get_error(), NULL));
-        return false;
-    }
-    return true;
-}
-
-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 {
-        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;
-}
-
 // 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.
@@ -1195,27 +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 {
-            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;
-    }
-}
-
 string FormatVersion(int nVersion)
 {
     if (nVersion%100 == 0)