You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
501 lines
15 KiB
501 lines
15 KiB
// Copyright (c) 2009-2010 Satoshi Nakamoto
|
|
// Copyright (c) 2009-2020 The Bitcoin Core developers
|
|
// Distributed under the MIT software license, see the accompanying
|
|
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
|
|
|
|
#if defined(HAVE_CONFIG_H)
|
|
#include <config/bitcoin-config.h>
|
|
#endif
|
|
|
|
#include <randomenv.h>
|
|
|
|
#include <clientversion.h>
|
|
#include <compat/cpuid.h>
|
|
#include <crypto/sha512.h>
|
|
#include <support/cleanse.h>
|
|
#include <util/time.h> // for GetTime()
|
|
#ifdef WIN32
|
|
#include <compat.h> // for Windows API
|
|
#endif
|
|
|
|
#include <algorithm>
|
|
#include <atomic>
|
|
#include <chrono>
|
|
#include <climits>
|
|
#include <thread>
|
|
#include <vector>
|
|
|
|
#include <stdint.h>
|
|
#include <string.h>
|
|
#ifndef WIN32
|
|
#include <sys/types.h> // must go before a number of other headers
|
|
#include <fcntl.h>
|
|
#include <netinet/in.h>
|
|
#include <sys/resource.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/time.h>
|
|
#include <sys/utsname.h>
|
|
#include <unistd.h>
|
|
#endif
|
|
#if HAVE_DECL_GETIFADDRS && HAVE_DECL_FREEIFADDRS
|
|
#include <ifaddrs.h>
|
|
#endif
|
|
#if HAVE_SYSCTL
|
|
#include <sys/sysctl.h>
|
|
#if HAVE_VM_VM_PARAM_H
|
|
#include <vm/vm_param.h>
|
|
#endif
|
|
#if HAVE_SYS_RESOURCES_H
|
|
#include <sys/resources.h>
|
|
#endif
|
|
#if HAVE_SYS_VMMETER_H
|
|
#include <sys/vmmeter.h>
|
|
#endif
|
|
#endif
|
|
#ifdef __linux__
|
|
#include <sys/auxv.h>
|
|
#endif
|
|
|
|
//! Necessary on some platforms
|
|
extern char** environ;
|
|
|
|
namespace {
|
|
|
|
void RandAddSeedPerfmon(CSHA512& hasher)
|
|
{
|
|
#ifdef WIN32
|
|
// Seed with the entire set of perfmon data
|
|
|
|
// This can take up to 2 seconds, so only do it every 10 minutes.
|
|
// Initialize last_perfmon to 0 seconds, we don't skip the first call.
|
|
static std::atomic<std::chrono::seconds> last_perfmon{std::chrono::seconds{0}};
|
|
auto last_time = last_perfmon.load();
|
|
auto current_time = GetTime<std::chrono::seconds>();
|
|
if (current_time < last_time + std::chrono::minutes{10}) return;
|
|
last_perfmon = current_time;
|
|
|
|
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", nullptr, nullptr, vData.data(), &nSize);
|
|
if (ret != ERROR_MORE_DATA || vData.size() >= nMaxSize)
|
|
break;
|
|
vData.resize(std::min((vData.size() * 3) / 2, nMaxSize)); // Grow size of buffer exponentially
|
|
}
|
|
RegCloseKey(HKEY_PERFORMANCE_DATA);
|
|
if (ret == ERROR_SUCCESS) {
|
|
hasher.Write(vData.data(), nSize);
|
|
memory_cleanse(vData.data(), nSize);
|
|
} else {
|
|
// Performance data is only a best-effort attempt at improving the
|
|
// situation when the OS randomness (and other sources) aren't
|
|
// adequate. As a result, failure to read it is isn't considered critical,
|
|
// so we don't call RandFailure().
|
|
// TODO: Add logging when the logger is made functional before global
|
|
// constructors have been invoked.
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/** Helper to easily feed data into a CSHA512.
|
|
*
|
|
* Note that this does not serialize the passed object (like stream.h's << operators do).
|
|
* Its raw memory representation is used directly.
|
|
*/
|
|
template<typename T>
|
|
CSHA512& operator<<(CSHA512& hasher, const T& data) {
|
|
static_assert(!std::is_same<typename std::decay<T>::type, char*>::value, "Calling operator<<(CSHA512, char*) is probably not what you want");
|
|
static_assert(!std::is_same<typename std::decay<T>::type, unsigned char*>::value, "Calling operator<<(CSHA512, unsigned char*) is probably not what you want");
|
|
static_assert(!std::is_same<typename std::decay<T>::type, const char*>::value, "Calling operator<<(CSHA512, const char*) is probably not what you want");
|
|
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");
|
|
hasher.Write((const unsigned char*)&data, sizeof(data));
|
|
return hasher;
|
|
}
|
|
|
|
#ifndef WIN32
|
|
void AddSockaddr(CSHA512& hasher, const struct sockaddr *addr)
|
|
{
|
|
if (addr == nullptr) return;
|
|
switch (addr->sa_family) {
|
|
case AF_INET:
|
|
hasher.Write((const unsigned char*)addr, sizeof(sockaddr_in));
|
|
break;
|
|
case AF_INET6:
|
|
hasher.Write((const unsigned char*)addr, sizeof(sockaddr_in6));
|
|
break;
|
|
default:
|
|
hasher.Write((const unsigned char*)&addr->sa_family, sizeof(addr->sa_family));
|
|
}
|
|
}
|
|
|
|
void AddFile(CSHA512& hasher, const char *path)
|
|
{
|
|
struct stat sb = {};
|
|
int f = open(path, O_RDONLY);
|
|
size_t total = 0;
|
|
if (f != -1) {
|
|
unsigned char fbuf[4096];
|
|
int n;
|
|
hasher.Write((const unsigned char*)&f, sizeof(f));
|
|
if (fstat(f, &sb) == 0) hasher << sb;
|
|
do {
|
|
n = read(f, fbuf, sizeof(fbuf));
|
|
if (n > 0) hasher.Write(fbuf, n);
|
|
total += n;
|
|
/* not bothering with EINTR handling. */
|
|
} while (n == sizeof(fbuf) && total < 1048576); // Read only the first 1 Mbyte
|
|
close(f);
|
|
}
|
|
}
|
|
|
|
void AddPath(CSHA512& hasher, const char *path)
|
|
{
|
|
struct stat sb = {};
|
|
if (stat(path, &sb) == 0) {
|
|
hasher.Write((const unsigned char*)path, strlen(path) + 1);
|
|
hasher << sb;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#if HAVE_SYSCTL
|
|
template<int... S>
|
|
void AddSysctl(CSHA512& hasher)
|
|
{
|
|
int CTL[sizeof...(S)] = {S...};
|
|
unsigned char buffer[65536];
|
|
size_t siz = 65536;
|
|
int ret = sysctl(CTL, sizeof...(S), buffer, &siz, nullptr, 0);
|
|
if (ret == 0 || (ret == -1 && errno == ENOMEM)) {
|
|
hasher << sizeof(CTL);
|
|
hasher.Write((const unsigned char*)CTL, sizeof(CTL));
|
|
if (siz > sizeof(buffer)) siz = sizeof(buffer);
|
|
hasher << siz;
|
|
hasher.Write(buffer, siz);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#ifdef HAVE_GETCPUID
|
|
void inline AddCPUID(CSHA512& hasher, uint32_t leaf, uint32_t subleaf, uint32_t& ax, uint32_t& bx, uint32_t& cx, uint32_t& dx)
|
|
{
|
|
GetCPUID(leaf, subleaf, ax, bx, cx, dx);
|
|
hasher << leaf << subleaf << ax << bx << cx << dx;
|
|
}
|
|
|
|
void AddAllCPUID(CSHA512& hasher)
|
|
{
|
|
uint32_t ax, bx, cx, dx;
|
|
// Iterate over all standard leaves
|
|
AddCPUID(hasher, 0, 0, ax, bx, cx, dx); // Returns max leaf in ax
|
|
uint32_t max = ax;
|
|
for (uint32_t leaf = 1; leaf <= max && leaf <= 0xFF; ++leaf) {
|
|
uint32_t maxsub = 0;
|
|
for (uint32_t subleaf = 0; subleaf <= 0xFF; ++subleaf) {
|
|
AddCPUID(hasher, leaf, subleaf, ax, bx, cx, dx);
|
|
// Iterate subleafs for leaf values 4, 7, 11, 13
|
|
if (leaf == 4) {
|
|
if ((ax & 0x1f) == 0) break;
|
|
} else if (leaf == 7) {
|
|
if (subleaf == 0) maxsub = ax;
|
|
if (subleaf == maxsub) break;
|
|
} else if (leaf == 11) {
|
|
if ((cx & 0xff00) == 0) break;
|
|
} else if (leaf == 13) {
|
|
if (ax == 0 && bx == 0 && cx == 0 && dx == 0) break;
|
|
} else {
|
|
// For any other leaf, stop after subleaf 0.
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
// Iterate over all extended leaves
|
|
AddCPUID(hasher, 0x80000000, 0, ax, bx, cx, dx); // Returns max extended leaf in ax
|
|
uint32_t ext_max = ax;
|
|
for (uint32_t leaf = 0x80000001; leaf <= ext_max && leaf <= 0x800000FF; ++leaf) {
|
|
AddCPUID(hasher, leaf, 0, ax, bx, cx, dx);
|
|
}
|
|
}
|
|
#endif
|
|
} // namespace
|
|
|
|
void RandAddDynamicEnv(CSHA512& hasher)
|
|
{
|
|
RandAddSeedPerfmon(hasher);
|
|
|
|
// Various clocks
|
|
#ifdef WIN32
|
|
FILETIME ftime;
|
|
GetSystemTimeAsFileTime(&ftime);
|
|
hasher << ftime;
|
|
#else
|
|
struct timespec ts = {};
|
|
# ifdef CLOCK_MONOTONIC
|
|
clock_gettime(CLOCK_MONOTONIC, &ts);
|
|
hasher << ts;
|
|
# endif
|
|
# ifdef CLOCK_REALTIME
|
|
clock_gettime(CLOCK_REALTIME, &ts);
|
|
hasher << ts;
|
|
# endif
|
|
# ifdef CLOCK_BOOTTIME
|
|
clock_gettime(CLOCK_BOOTTIME, &ts);
|
|
hasher << ts;
|
|
# endif
|
|
// gettimeofday is available on all UNIX systems, but only has microsecond precision.
|
|
struct timeval tv = {};
|
|
gettimeofday(&tv, nullptr);
|
|
hasher << tv;
|
|
#endif
|
|
// Probably redundant, but also use all the clocks C++11 provides:
|
|
hasher << std::chrono::system_clock::now().time_since_epoch().count();
|
|
hasher << std::chrono::steady_clock::now().time_since_epoch().count();
|
|
hasher << std::chrono::high_resolution_clock::now().time_since_epoch().count();
|
|
|
|
#ifndef WIN32
|
|
// Current resource usage.
|
|
struct rusage usage = {};
|
|
if (getrusage(RUSAGE_SELF, &usage) == 0) hasher << usage;
|
|
#endif
|
|
|
|
#ifdef __linux__
|
|
AddFile(hasher, "/proc/diskstats");
|
|
AddFile(hasher, "/proc/vmstat");
|
|
AddFile(hasher, "/proc/schedstat");
|
|
AddFile(hasher, "/proc/zoneinfo");
|
|
AddFile(hasher, "/proc/meminfo");
|
|
AddFile(hasher, "/proc/softirqs");
|
|
AddFile(hasher, "/proc/stat");
|
|
AddFile(hasher, "/proc/self/schedstat");
|
|
AddFile(hasher, "/proc/self/status");
|
|
#endif
|
|
|
|
#if HAVE_SYSCTL
|
|
# ifdef CTL_KERN
|
|
# if defined(KERN_PROC) && defined(KERN_PROC_ALL)
|
|
AddSysctl<CTL_KERN, KERN_PROC, KERN_PROC_ALL>(hasher);
|
|
# endif
|
|
# endif
|
|
# ifdef CTL_HW
|
|
# ifdef HW_DISKSTATS
|
|
AddSysctl<CTL_HW, HW_DISKSTATS>(hasher);
|
|
# endif
|
|
# endif
|
|
# ifdef CTL_VM
|
|
# ifdef VM_LOADAVG
|
|
AddSysctl<CTL_VM, VM_LOADAVG>(hasher);
|
|
# endif
|
|
# ifdef VM_TOTAL
|
|
AddSysctl<CTL_VM, VM_TOTAL>(hasher);
|
|
# endif
|
|
# ifdef VM_METER
|
|
AddSysctl<CTL_VM, VM_METER>(hasher);
|
|
# endif
|
|
# endif
|
|
#endif
|
|
|
|
// Stack and heap location
|
|
void* addr = malloc(4097);
|
|
hasher << &addr << addr;
|
|
free(addr);
|
|
}
|
|
|
|
void RandAddStaticEnv(CSHA512& hasher)
|
|
{
|
|
// Some compile-time static properties
|
|
hasher << (CHAR_MIN < 0) << sizeof(void*) << sizeof(long) << sizeof(int);
|
|
#if defined(__GNUC__) && defined(__GNUC_MINOR__) && defined(__GNUC_PATCHLEVEL__)
|
|
hasher << __GNUC__ << __GNUC_MINOR__ << __GNUC_PATCHLEVEL__;
|
|
#endif
|
|
#ifdef _MSC_VER
|
|
hasher << _MSC_VER;
|
|
#endif
|
|
hasher << __cplusplus;
|
|
#ifdef _XOPEN_VERSION
|
|
hasher << _XOPEN_VERSION;
|
|
#endif
|
|
#ifdef __VERSION__
|
|
const char* COMPILER_VERSION = __VERSION__;
|
|
hasher.Write((const unsigned char*)COMPILER_VERSION, strlen(COMPILER_VERSION) + 1);
|
|
#endif
|
|
|
|
// Bitcoin client version
|
|
hasher << CLIENT_VERSION;
|
|
|
|
#ifdef __linux__
|
|
// Information available through getauxval()
|
|
# ifdef AT_HWCAP
|
|
hasher << getauxval(AT_HWCAP);
|
|
# endif
|
|
# ifdef AT_HWCAP2
|
|
hasher << getauxval(AT_HWCAP2);
|
|
# endif
|
|
# ifdef AT_RANDOM
|
|
const unsigned char* random_aux = (const unsigned char*)getauxval(AT_RANDOM);
|
|
if (random_aux) hasher.Write(random_aux, 16);
|
|
# endif
|
|
# ifdef AT_PLATFORM
|
|
const char* platform_str = (const char*)getauxval(AT_PLATFORM);
|
|
if (platform_str) hasher.Write((const unsigned char*)platform_str, strlen(platform_str) + 1);
|
|
# endif
|
|
# ifdef AT_EXECFN
|
|
const char* exec_str = (const char*)getauxval(AT_EXECFN);
|
|
if (exec_str) hasher.Write((const unsigned char*)exec_str, strlen(exec_str) + 1);
|
|
# endif
|
|
#endif // __linux__
|
|
|
|
#ifdef HAVE_GETCPUID
|
|
AddAllCPUID(hasher);
|
|
#endif
|
|
|
|
// Memory locations
|
|
hasher << &hasher << &RandAddStaticEnv << &malloc << &errno << &environ;
|
|
|
|
// Hostname
|
|
char hname[256];
|
|
if (gethostname(hname, 256) == 0) {
|
|
hasher.Write((const unsigned char*)hname, strnlen(hname, 256));
|
|
}
|
|
|
|
#if HAVE_DECL_GETIFADDRS && HAVE_DECL_FREEIFADDRS
|
|
// Network interfaces
|
|
struct ifaddrs *ifad = NULL;
|
|
getifaddrs(&ifad);
|
|
struct ifaddrs *ifit = ifad;
|
|
while (ifit != NULL) {
|
|
hasher.Write((const unsigned char*)&ifit, sizeof(ifit));
|
|
hasher.Write((const unsigned char*)ifit->ifa_name, strlen(ifit->ifa_name) + 1);
|
|
hasher.Write((const unsigned char*)&ifit->ifa_flags, sizeof(ifit->ifa_flags));
|
|
AddSockaddr(hasher, ifit->ifa_addr);
|
|
AddSockaddr(hasher, ifit->ifa_netmask);
|
|
AddSockaddr(hasher, ifit->ifa_dstaddr);
|
|
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);
|
|
hasher.Write((const unsigned char*)&name.release, strlen(name.release) + 1);
|
|
hasher.Write((const unsigned char*)&name.version, strlen(name.version) + 1);
|
|
hasher.Write((const unsigned char*)&name.machine, strlen(name.machine) + 1);
|
|
}
|
|
|
|
/* Path and filesystem provided data */
|
|
AddPath(hasher, "/");
|
|
AddPath(hasher, ".");
|
|
AddPath(hasher, "/tmp");
|
|
AddPath(hasher, "/home");
|
|
AddPath(hasher, "/proc");
|
|
#ifdef __linux__
|
|
AddFile(hasher, "/proc/cmdline");
|
|
AddFile(hasher, "/proc/cpuinfo");
|
|
AddFile(hasher, "/proc/version");
|
|
#endif
|
|
AddFile(hasher, "/etc/passwd");
|
|
AddFile(hasher, "/etc/group");
|
|
AddFile(hasher, "/etc/hosts");
|
|
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();
|
|
}
|