Initial Vexta Core v0.1.0 release
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25c454329d
2481 changed files with 689289 additions and 0 deletions
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src/randomenv.cpp
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src/randomenv.cpp
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// Copyright (c) 2009-2010 Satoshi Nakamoto
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// Copyright (c) 2009-2020 The DigiByte Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#if defined(HAVE_CONFIG_H)
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#include <config/vexta-config.h>
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#endif
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#include <randomenv.h>
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#include <clientversion.h>
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#include <compat/cpuid.h>
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#include <crypto/sha512.h>
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#include <support/cleanse.h>
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#include <util/time.h> // for GetTime()
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#ifdef WIN32
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#include <compat.h> // for Windows API
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#endif
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#include <algorithm>
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#include <atomic>
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#include <chrono>
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#include <climits>
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#include <thread>
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#include <vector>
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#include <stdint.h>
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#include <string.h>
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#ifndef WIN32
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#include <sys/types.h> // must go before a number of other headers
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#include <fcntl.h>
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#include <netinet/in.h>
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#include <sys/resource.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <sys/time.h>
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#include <sys/utsname.h>
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#include <unistd.h>
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#endif
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#if HAVE_DECL_GETIFADDRS && HAVE_DECL_FREEIFADDRS
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#include <ifaddrs.h>
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#endif
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#if HAVE_SYSCTL
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#include <sys/sysctl.h>
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#if HAVE_VM_VM_PARAM_H
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#include <vm/vm_param.h>
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#endif
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#if HAVE_SYS_RESOURCES_H
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#include <sys/resources.h>
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#endif
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#if HAVE_SYS_VMMETER_H
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#include <sys/vmmeter.h>
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#endif
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#endif
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#if defined(HAVE_STRONG_GETAUXVAL) || defined(HAVE_WEAK_GETAUXVAL)
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#include <sys/auxv.h>
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#endif
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//! Necessary on some platforms
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extern char** environ;
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namespace {
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void RandAddSeedPerfmon(CSHA512& hasher)
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{
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#ifdef WIN32
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// Seed with the entire set of perfmon data
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// This can take up to 2 seconds, so only do it every 10 minutes.
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// Initialize last_perfmon to 0 seconds, we don't skip the first call.
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static std::atomic<std::chrono::seconds> last_perfmon{0s};
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auto last_time = last_perfmon.load();
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auto current_time = GetTime<std::chrono::seconds>();
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if (current_time < last_time + std::chrono::minutes{10}) return;
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last_perfmon = current_time;
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std::vector<unsigned char> vData(250000, 0);
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long ret = 0;
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unsigned long nSize = 0;
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const size_t nMaxSize = 10000000; // Bail out at more than 10MB of performance data
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while (true) {
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nSize = vData.size();
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ret = RegQueryValueExA(HKEY_PERFORMANCE_DATA, "Global", nullptr, nullptr, vData.data(), &nSize);
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if (ret != ERROR_MORE_DATA || vData.size() >= nMaxSize)
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break;
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vData.resize(std::min((vData.size() * 3) / 2, nMaxSize)); // Grow size of buffer exponentially
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}
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RegCloseKey(HKEY_PERFORMANCE_DATA);
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if (ret == ERROR_SUCCESS) {
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hasher.Write(vData.data(), nSize);
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memory_cleanse(vData.data(), nSize);
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} else {
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// Performance data is only a best-effort attempt at improving the
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// situation when the OS randomness (and other sources) aren't
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// adequate. As a result, failure to read it is isn't considered critical,
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// so we don't call RandFailure().
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// TODO: Add logging when the logger is made functional before global
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// constructors have been invoked.
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}
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#endif
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}
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/** Helper to easily feed data into a CSHA512.
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*
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* Note that this does not serialize the passed object (like stream.h's << operators do).
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* Its raw memory representation is used directly.
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*/
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template<typename T>
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CSHA512& operator<<(CSHA512& hasher, const T& data) {
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static_assert(!std::is_same<typename std::decay<T>::type, char*>::value, "Calling operator<<(CSHA512, char*) is probably not what you want");
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static_assert(!std::is_same<typename std::decay<T>::type, unsigned char*>::value, "Calling operator<<(CSHA512, unsigned char*) is probably not what you want");
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static_assert(!std::is_same<typename std::decay<T>::type, const char*>::value, "Calling operator<<(CSHA512, const char*) is probably not what you want");
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static_assert(!std::is_same<typename std::decay<T>::type, const unsigned char*>::value, "Calling operator<<(CSHA512, const unsigned char*) is probably not what you want");
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hasher.Write((const unsigned char*)&data, sizeof(data));
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return hasher;
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}
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#ifndef WIN32
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void AddSockaddr(CSHA512& hasher, const struct sockaddr *addr)
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{
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if (addr == nullptr) return;
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switch (addr->sa_family) {
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case AF_INET:
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hasher.Write((const unsigned char*)addr, sizeof(sockaddr_in));
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break;
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case AF_INET6:
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hasher.Write((const unsigned char*)addr, sizeof(sockaddr_in6));
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break;
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default:
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hasher.Write((const unsigned char*)&addr->sa_family, sizeof(addr->sa_family));
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}
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}
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void AddFile(CSHA512& hasher, const char *path)
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{
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struct stat sb = {};
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int f = open(path, O_RDONLY);
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size_t total = 0;
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if (f != -1) {
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unsigned char fbuf[4096];
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int n;
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hasher.Write((const unsigned char*)&f, sizeof(f));
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if (fstat(f, &sb) == 0) hasher << sb;
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do {
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n = read(f, fbuf, sizeof(fbuf));
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if (n > 0) hasher.Write(fbuf, n);
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total += n;
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/* not bothering with EINTR handling. */
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} while (n == sizeof(fbuf) && total < 1048576); // Read only the first 1 Mbyte
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close(f);
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}
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}
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void AddPath(CSHA512& hasher, const char *path)
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{
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struct stat sb = {};
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if (stat(path, &sb) == 0) {
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hasher.Write((const unsigned char*)path, strlen(path) + 1);
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hasher << sb;
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}
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}
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#endif
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#if HAVE_SYSCTL
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template<int... S>
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void AddSysctl(CSHA512& hasher)
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{
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int CTL[sizeof...(S)] = {S...};
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unsigned char buffer[65536];
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size_t siz = 65536;
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int ret = sysctl(CTL, sizeof...(S), buffer, &siz, nullptr, 0);
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if (ret == 0 || (ret == -1 && errno == ENOMEM)) {
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hasher << sizeof(CTL);
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hasher.Write((const unsigned char*)CTL, sizeof(CTL));
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if (siz > sizeof(buffer)) siz = sizeof(buffer);
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hasher << siz;
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hasher.Write(buffer, siz);
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}
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}
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#endif
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#ifdef HAVE_GETCPUID
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void inline AddCPUID(CSHA512& hasher, uint32_t leaf, uint32_t subleaf, uint32_t& ax, uint32_t& bx, uint32_t& cx, uint32_t& dx)
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{
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GetCPUID(leaf, subleaf, ax, bx, cx, dx);
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hasher << leaf << subleaf << ax << bx << cx << dx;
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}
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void AddAllCPUID(CSHA512& hasher)
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{
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uint32_t ax, bx, cx, dx;
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// Iterate over all standard leaves
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AddCPUID(hasher, 0, 0, ax, bx, cx, dx); // Returns max leaf in ax
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uint32_t max = ax;
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for (uint32_t leaf = 1; leaf <= max && leaf <= 0xFF; ++leaf) {
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uint32_t maxsub = 0;
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for (uint32_t subleaf = 0; subleaf <= 0xFF; ++subleaf) {
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AddCPUID(hasher, leaf, subleaf, ax, bx, cx, dx);
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// Iterate subleafs for leaf values 4, 7, 11, 13
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if (leaf == 4) {
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if ((ax & 0x1f) == 0) break;
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} else if (leaf == 7) {
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if (subleaf == 0) maxsub = ax;
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if (subleaf == maxsub) break;
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} else if (leaf == 11) {
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if ((cx & 0xff00) == 0) break;
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} else if (leaf == 13) {
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if (ax == 0 && bx == 0 && cx == 0 && dx == 0) break;
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} else {
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// For any other leaf, stop after subleaf 0.
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break;
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}
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}
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}
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// Iterate over all extended leaves
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AddCPUID(hasher, 0x80000000, 0, ax, bx, cx, dx); // Returns max extended leaf in ax
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uint32_t ext_max = ax;
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for (uint32_t leaf = 0x80000001; leaf <= ext_max && leaf <= 0x800000FF; ++leaf) {
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AddCPUID(hasher, leaf, 0, ax, bx, cx, dx);
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}
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}
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#endif
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} // namespace
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void RandAddDynamicEnv(CSHA512& hasher)
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{
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RandAddSeedPerfmon(hasher);
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// Various clocks
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#ifdef WIN32
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FILETIME ftime;
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GetSystemTimeAsFileTime(&ftime);
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hasher << ftime;
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#else
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struct timespec ts = {};
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# ifdef CLOCK_MONOTONIC
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clock_gettime(CLOCK_MONOTONIC, &ts);
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hasher << ts;
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# endif
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# ifdef CLOCK_REALTIME
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clock_gettime(CLOCK_REALTIME, &ts);
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hasher << ts;
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# endif
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# ifdef CLOCK_BOOTTIME
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clock_gettime(CLOCK_BOOTTIME, &ts);
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hasher << ts;
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# endif
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// gettimeofday is available on all UNIX systems, but only has microsecond precision.
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struct timeval tv = {};
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gettimeofday(&tv, nullptr);
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hasher << tv;
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#endif
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// Probably redundant, but also use all the clocks C++11 provides:
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hasher << std::chrono::system_clock::now().time_since_epoch().count();
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hasher << std::chrono::steady_clock::now().time_since_epoch().count();
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hasher << std::chrono::high_resolution_clock::now().time_since_epoch().count();
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#ifndef WIN32
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// Current resource usage.
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struct rusage usage = {};
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if (getrusage(RUSAGE_SELF, &usage) == 0) hasher << usage;
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#endif
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#ifdef __linux__
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AddFile(hasher, "/proc/diskstats");
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AddFile(hasher, "/proc/vmstat");
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AddFile(hasher, "/proc/schedstat");
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AddFile(hasher, "/proc/zoneinfo");
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AddFile(hasher, "/proc/meminfo");
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AddFile(hasher, "/proc/softirqs");
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AddFile(hasher, "/proc/stat");
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AddFile(hasher, "/proc/self/schedstat");
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AddFile(hasher, "/proc/self/status");
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#endif
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#if HAVE_SYSCTL
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# ifdef CTL_KERN
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# if defined(KERN_PROC) && defined(KERN_PROC_ALL)
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AddSysctl<CTL_KERN, KERN_PROC, KERN_PROC_ALL>(hasher);
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# endif
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# endif
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# ifdef CTL_HW
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# ifdef HW_DISKSTATS
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AddSysctl<CTL_HW, HW_DISKSTATS>(hasher);
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# endif
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# endif
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# ifdef CTL_VM
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# ifdef VM_LOADAVG
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AddSysctl<CTL_VM, VM_LOADAVG>(hasher);
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# endif
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# ifdef VM_TOTAL
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AddSysctl<CTL_VM, VM_TOTAL>(hasher);
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# endif
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# ifdef VM_METER
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AddSysctl<CTL_VM, VM_METER>(hasher);
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# endif
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# endif
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#endif
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// Stack and heap location
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void* addr = malloc(4097);
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hasher << &addr << addr;
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free(addr);
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}
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void RandAddStaticEnv(CSHA512& hasher)
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{
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// Some compile-time static properties
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hasher << (CHAR_MIN < 0) << sizeof(void*) << sizeof(long) << sizeof(int);
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#if defined(__GNUC__) && defined(__GNUC_MINOR__) && defined(__GNUC_PATCHLEVEL__)
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hasher << __GNUC__ << __GNUC_MINOR__ << __GNUC_PATCHLEVEL__;
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#endif
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#ifdef _MSC_VER
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hasher << _MSC_VER;
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#endif
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hasher << __cplusplus;
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#ifdef _XOPEN_VERSION
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hasher << _XOPEN_VERSION;
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#endif
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#ifdef __VERSION__
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const char* COMPILER_VERSION = __VERSION__;
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hasher.Write((const unsigned char*)COMPILER_VERSION, strlen(COMPILER_VERSION) + 1);
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#endif
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// Vexta client version
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hasher << CLIENT_VERSION;
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#if defined(HAVE_STRONG_GETAUXVAL) || defined(HAVE_WEAK_GETAUXVAL)
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// Information available through getauxval()
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# ifdef AT_HWCAP
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hasher << getauxval(AT_HWCAP);
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# endif
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# ifdef AT_HWCAP2
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hasher << getauxval(AT_HWCAP2);
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# endif
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# ifdef AT_RANDOM
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const unsigned char* random_aux = (const unsigned char*)getauxval(AT_RANDOM);
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if (random_aux) hasher.Write(random_aux, 16);
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# endif
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# ifdef AT_PLATFORM
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const char* platform_str = (const char*)getauxval(AT_PLATFORM);
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if (platform_str) hasher.Write((const unsigned char*)platform_str, strlen(platform_str) + 1);
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# endif
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# ifdef AT_EXECFN
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const char* exec_str = (const char*)getauxval(AT_EXECFN);
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if (exec_str) hasher.Write((const unsigned char*)exec_str, strlen(exec_str) + 1);
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# endif
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#endif // HAVE_STRONG_GETAUXVAL || HAVE_WEAK_GETAUXVAL
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#ifdef HAVE_GETCPUID
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AddAllCPUID(hasher);
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#endif
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|
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// Memory locations
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hasher << &hasher << &RandAddStaticEnv << &malloc << &errno << &environ;
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||||
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||||
// Hostname
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char hname[256];
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if (gethostname(hname, 256) == 0) {
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hasher.Write((const unsigned char*)hname, strnlen(hname, 256));
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}
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#if HAVE_DECL_GETIFADDRS && HAVE_DECL_FREEIFADDRS
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// Network interfaces
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struct ifaddrs *ifad = NULL;
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getifaddrs(&ifad);
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struct ifaddrs *ifit = ifad;
|
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while (ifit != NULL) {
|
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hasher.Write((const unsigned char*)&ifit, sizeof(ifit));
|
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hasher.Write((const unsigned char*)ifit->ifa_name, strlen(ifit->ifa_name) + 1);
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hasher.Write((const unsigned char*)&ifit->ifa_flags, sizeof(ifit->ifa_flags));
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AddSockaddr(hasher, ifit->ifa_addr);
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AddSockaddr(hasher, ifit->ifa_netmask);
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AddSockaddr(hasher, ifit->ifa_dstaddr);
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||||
ifit = ifit->ifa_next;
|
||||
}
|
||||
freeifaddrs(ifad);
|
||||
#endif
|
||||
|
||||
#ifndef WIN32
|
||||
// UNIX kernel information
|
||||
struct utsname name;
|
||||
if (uname(&name) != -1) {
|
||||
hasher.Write((const unsigned char*)&name.sysname, strlen(name.sysname) + 1);
|
||||
hasher.Write((const unsigned char*)&name.nodename, strlen(name.nodename) + 1);
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||||
hasher.Write((const unsigned char*)&name.release, strlen(name.release) + 1);
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||||
hasher.Write((const unsigned char*)&name.version, strlen(name.version) + 1);
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hasher.Write((const unsigned char*)&name.machine, strlen(name.machine) + 1);
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}
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|
||||
/* Path and filesystem provided data */
|
||||
AddPath(hasher, "/");
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||||
AddPath(hasher, ".");
|
||||
AddPath(hasher, "/tmp");
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||||
AddPath(hasher, "/home");
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||||
AddPath(hasher, "/proc");
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#ifdef __linux__
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||||
AddFile(hasher, "/proc/cmdline");
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AddFile(hasher, "/proc/cpuinfo");
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||||
AddFile(hasher, "/proc/version");
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||||
#endif
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||||
AddFile(hasher, "/etc/passwd");
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||||
AddFile(hasher, "/etc/group");
|
||||
AddFile(hasher, "/etc/hosts");
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||||
AddFile(hasher, "/etc/resolv.conf");
|
||||
AddFile(hasher, "/etc/timezone");
|
||||
AddFile(hasher, "/etc/localtime");
|
||||
#endif
|
||||
|
||||
// For MacOS/BSDs, gather data through sysctl instead of /proc. Not all of these
|
||||
// will exist on every system.
|
||||
#if HAVE_SYSCTL
|
||||
# ifdef CTL_HW
|
||||
# ifdef HW_MACHINE
|
||||
AddSysctl<CTL_HW, HW_MACHINE>(hasher);
|
||||
# endif
|
||||
# ifdef HW_MODEL
|
||||
AddSysctl<CTL_HW, HW_MODEL>(hasher);
|
||||
# endif
|
||||
# ifdef HW_NCPU
|
||||
AddSysctl<CTL_HW, HW_NCPU>(hasher);
|
||||
# endif
|
||||
# ifdef HW_PHYSMEM
|
||||
AddSysctl<CTL_HW, HW_PHYSMEM>(hasher);
|
||||
# endif
|
||||
# ifdef HW_USERMEM
|
||||
AddSysctl<CTL_HW, HW_USERMEM>(hasher);
|
||||
# endif
|
||||
# ifdef HW_MACHINE_ARCH
|
||||
AddSysctl<CTL_HW, HW_MACHINE_ARCH>(hasher);
|
||||
# endif
|
||||
# ifdef HW_REALMEM
|
||||
AddSysctl<CTL_HW, HW_REALMEM>(hasher);
|
||||
# endif
|
||||
# ifdef HW_CPU_FREQ
|
||||
AddSysctl<CTL_HW, HW_CPU_FREQ>(hasher);
|
||||
# endif
|
||||
# ifdef HW_BUS_FREQ
|
||||
AddSysctl<CTL_HW, HW_BUS_FREQ>(hasher);
|
||||
# endif
|
||||
# ifdef HW_CACHELINE
|
||||
AddSysctl<CTL_HW, HW_CACHELINE>(hasher);
|
||||
# endif
|
||||
# endif
|
||||
# ifdef CTL_KERN
|
||||
# ifdef KERN_BOOTFILE
|
||||
AddSysctl<CTL_KERN, KERN_BOOTFILE>(hasher);
|
||||
# endif
|
||||
# ifdef KERN_BOOTTIME
|
||||
AddSysctl<CTL_KERN, KERN_BOOTTIME>(hasher);
|
||||
# endif
|
||||
# ifdef KERN_CLOCKRATE
|
||||
AddSysctl<CTL_KERN, KERN_CLOCKRATE>(hasher);
|
||||
# endif
|
||||
# ifdef KERN_HOSTID
|
||||
AddSysctl<CTL_KERN, KERN_HOSTID>(hasher);
|
||||
# endif
|
||||
# ifdef KERN_HOSTUUID
|
||||
AddSysctl<CTL_KERN, KERN_HOSTUUID>(hasher);
|
||||
# endif
|
||||
# ifdef KERN_HOSTNAME
|
||||
AddSysctl<CTL_KERN, KERN_HOSTNAME>(hasher);
|
||||
# endif
|
||||
# ifdef KERN_OSRELDATE
|
||||
AddSysctl<CTL_KERN, KERN_OSRELDATE>(hasher);
|
||||
# endif
|
||||
# ifdef KERN_OSRELEASE
|
||||
AddSysctl<CTL_KERN, KERN_OSRELEASE>(hasher);
|
||||
# endif
|
||||
# ifdef KERN_OSREV
|
||||
AddSysctl<CTL_KERN, KERN_OSREV>(hasher);
|
||||
# endif
|
||||
# ifdef KERN_OSTYPE
|
||||
AddSysctl<CTL_KERN, KERN_OSTYPE>(hasher);
|
||||
# endif
|
||||
# ifdef KERN_POSIX1
|
||||
AddSysctl<CTL_KERN, KERN_OSREV>(hasher);
|
||||
# endif
|
||||
# ifdef KERN_VERSION
|
||||
AddSysctl<CTL_KERN, KERN_VERSION>(hasher);
|
||||
# endif
|
||||
# endif
|
||||
#endif
|
||||
|
||||
// Env variables
|
||||
if (environ) {
|
||||
for (size_t i = 0; environ[i]; ++i) {
|
||||
hasher.Write((const unsigned char*)environ[i], strlen(environ[i]));
|
||||
}
|
||||
}
|
||||
|
||||
// Process, thread, user, session, group, ... ids.
|
||||
#ifdef WIN32
|
||||
hasher << GetCurrentProcessId() << GetCurrentThreadId();
|
||||
#else
|
||||
hasher << getpid() << getppid() << getsid(0) << getpgid(0) << getuid() << geteuid() << getgid() << getegid();
|
||||
#endif
|
||||
hasher << std::this_thread::get_id();
|
||||
}
|
||||
Loading…
Reference in a new issue