/root/bitcoin/src/randomenv.cpp

Source (jump to first uncovered line)
// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2022 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#include <bitcoin-build-config.h> // IWYU pragma: keep

#include <randomenv.h>

#include <clientversion.h>
#include <compat/compat.h>
#include <compat/cpuid.h>
#include <crypto/sha512.h>
#include <span.h>
#include <support/cleanse.h>
#include <util/time.h>

#include <algorithm>
#include <atomic>
#include <cstdint>
#include <cstring>
#include <chrono>
#include <climits>
#include <thread>
#include <vector>

#include <sys/types.h> // must go before a number of other headers

#ifdef WIN32
#include <windows.h>
#else
#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
#ifdef HAVE_SYSCTL
#include <sys/sysctl.h>
#ifdef HAVE_VM_VM_PARAM_H
#include <vm/vm_param.h>
#endif
#ifdef HAVE_SYS_RESOURCES_H
#include <sys/resources.h>
#endif
#ifdef HAVE_SYS_VMMETER_H
#include <sys/vmmeter.h>
#endif
#endif
#if defined(HAVE_STRONG_GETAUXVAL)
#include <sys/auxv.h>
#endif

#ifndef _MSC_VER
extern char** environ; // NOLINT(readability-redundant-declaration): Necessary on some platforms
#endif

namespace {

/** 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_v<std::decay_t<T>, char*>, "Calling operator<<(CSHA512, char*) is probably not what you want");
    static_assert(!std::is_same_v<std::decay_t<T>, unsigned char*>, "Calling operator<<(CSHA512, unsigned char*) is probably not what you want");
    static_assert(!std::is_same_v<std::decay_t<T>, const char*>, "Calling operator<<(CSHA512, const char*) is probably not what you want");
    static_assert(!std::is_same_v<std::decay_t<T>, const unsigned char*>, "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

#ifdef 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)
{
    // 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 standard library clocks:
    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

#ifdef 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;

#if defined(HAVE_STRONG_GETAUXVAL)
    // 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 // HAVE_STRONG_GETAUXVAL

#ifdef HAVE_GETCPUID
    AddAllCPUID(hasher);
#endif

    // Memory locations
    hasher << &hasher << &RandAddStaticEnv << &malloc << &errno << &environ;

    // Hostname
#ifdef WIN32
    constexpr DWORD max_size = MAX_COMPUTERNAME_LENGTH + 1;
    char hname[max_size];
    DWORD size = max_size;
    if (GetComputerNameA(hname, &size) != 0) {
        hasher.Write(UCharCast(hname), size);
    }
#else
    char hname[256];
    if (gethostname(hname, 256) == 0) {
        hasher.Write((const unsigned char*)hname, strnlen(hname, 256));
    }
#endif

#if HAVE_DECL_GETIFADDRS && HAVE_DECL_FREEIFADDRS
    // Network interfaces
    struct ifaddrs *ifad = nullptr;
    getifaddrs(&ifad);
    struct ifaddrs *ifit = ifad;
    while (ifit != nullptr) {
        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.
#ifdef 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();
}

Coverage Report

Created: 2025-03-18 19:34

Line	Count	Source (jump to first uncovered line)
1		// Copyright (c) 2009-2010 Satoshi Nakamoto
2		// Copyright (c) 2009-2022 The Bitcoin Core developers
3		// Distributed under the MIT software license, see the accompanying
4		// file COPYING or http://www.opensource.org/licenses/mit-license.php.
5
6		#include <bitcoin-build-config.h> // IWYU pragma: keep
7
8		#include <randomenv.h>
9
10		#include <clientversion.h>
11		#include <compat/compat.h>
12		#include <compat/cpuid.h>
13		#include <crypto/sha512.h>
14		#include <span.h>
15		#include <support/cleanse.h>
16		#include <util/time.h>
17
18		#include <algorithm>
19		#include <atomic>
20		#include <cstdint>
21		#include <cstring>
22		#include <chrono>
23		#include <climits>
24		#include <thread>
25		#include <vector>
26
27		#include <sys/types.h> // must go before a number of other headers
28
29		#ifdef WIN32
30		#include <windows.h>
31		#else
32		#include <fcntl.h>
33		#include <netinet/in.h>
34		#include <sys/resource.h>
35		#include <sys/socket.h>
36		#include <sys/stat.h>
37		#include <sys/time.h>
38		#include <sys/utsname.h>
39		#include <unistd.h>
40		#endif
41		#if HAVE_DECL_GETIFADDRS && HAVE_DECL_FREEIFADDRS
42		#include <ifaddrs.h>
43		#endif
44		#ifdef HAVE_SYSCTL
45		#include <sys/sysctl.h>
46		#ifdef HAVE_VM_VM_PARAM_H
47		#include <vm/vm_param.h>
48		#endif
49		#ifdef HAVE_SYS_RESOURCES_H
50		#include <sys/resources.h>
51		#endif
52		#ifdef HAVE_SYS_VMMETER_H
53		#include <sys/vmmeter.h>
54		#endif
55		#endif
56		#if defined(HAVE_STRONG_GETAUXVAL)
57		#include <sys/auxv.h>
58		#endif
59
60		#ifndef _MSC_VER
61		extern char** environ; // NOLINT(readability-redundant-declaration): Necessary on some platforms
62		#endif
63
64		namespace {
65
66		/** Helper to easily feed data into a CSHA512.
67		*
68		* Note that this does not serialize the passed object (like stream.h's << operators do).
69		* Its raw memory representation is used directly.
70		*/
71		template<typename T>
72	0	CSHA512& operator<<(CSHA512& hasher, const T& data) {
73	0	static_assert(!std::is_same_v<std::decay_t<T>, char>, "Calling operator<<(CSHA512, char) is probably not what you want");
74	0	static_assert(!std::is_same_v<std::decay_t<T>, unsigned char>, "Calling operator<<(CSHA512, unsigned char) is probably not what you want");
75	0	static_assert(!std::is_same_v<std::decay_t<T>, const char>, "Calling operator<<(CSHA512, const char) is probably not what you want");
76	0	static_assert(!std::is_same_v<std::decay_t<T>, const unsigned char>, "Calling operator<<(CSHA512, const unsigned char) is probably not what you want");
77	0	hasher.Write((const unsigned char*)&data, sizeof(data));
78	0	return hasher;
79	0	} Unexecuted instantiation: randomenv.cpp:CSHA512& (anonymous namespace)::operator<< <stat>(CSHA512&, stat const&) Unexecuted instantiation: randomenv.cpp:CSHA512& (anonymous namespace)::operator<< <unsigned int>(CSHA512&, unsigned int const&) Unexecuted instantiation: randomenv.cpp:CSHA512& (anonymous namespace)::operator<< <timespec>(CSHA512&, timespec const&) Unexecuted instantiation: randomenv.cpp:CSHA512& (anonymous namespace)::operator<< <timeval>(CSHA512&, timeval const&) Unexecuted instantiation: randomenv.cpp:CSHA512& (anonymous namespace)::operator<< <long>(CSHA512&, long const&) Unexecuted instantiation: randomenv.cpp:CSHA512& (anonymous namespace)::operator<< <rusage>(CSHA512&, rusage const&) Unexecuted instantiation: randomenv.cpp:CSHA512& (anonymous namespace)::operator<< <void>(CSHA512&, void const&) Unexecuted instantiation: randomenv.cpp:CSHA512& (anonymous namespace)::operator<< <void>(CSHA512&, void const&) Unexecuted instantiation: randomenv.cpp:CSHA512& (anonymous namespace)::operator<< <bool>(CSHA512&, bool const&) Unexecuted instantiation: randomenv.cpp:CSHA512& (anonymous namespace)::operator<< <unsigned long>(CSHA512&, unsigned long const&) Unexecuted instantiation: randomenv.cpp:CSHA512& (anonymous namespace)::operator<< <int>(CSHA512&, int const&) Unexecuted instantiation: randomenv.cpp:CSHA512& (anonymous namespace)::operator<< <CSHA512>(CSHA512&, CSHA512 const&) Unexecuted instantiation: randomenv.cpp:CSHA512& (anonymous namespace)::operator<< <void ()(CSHA512&)>(CSHA512&, void ( const&)(CSHA512&)) Unexecuted instantiation: randomenv.cpp:CSHA512& (anonymous namespace)::operator<< <void* ()(unsigned long) noexcept>(CSHA512&, void (* const&)(unsigned long) noexcept) Unexecuted instantiation: randomenv.cpp:CSHA512& (anonymous namespace)::operator<< <int>(CSHA512&, int const&) Unexecuted instantiation: randomenv.cpp:CSHA512& (anonymous namespace)::operator<< <char*>(CSHA512&, char* const&) Unexecuted instantiation: randomenv.cpp:CSHA512& (anonymous namespace)::operator<< <std::thread::id>(CSHA512&, std::thread::id const&)
80
81		#ifndef WIN32
82		void AddSockaddr(CSHA512& hasher, const struct sockaddr *addr)
83	0	{
84	0	if (addr == nullptr) return; Branch (84:9): [True: 0, False: 0]
85	0	switch (addr->sa_family) {
86	0	case AF_INET: Branch (86:5): [True: 0, False: 0]
87	0	hasher.Write((const unsigned char*)addr, sizeof(sockaddr_in));
88	0	break;
89	0	case AF_INET6: Branch (89:5): [True: 0, False: 0]
90	0	hasher.Write((const unsigned char*)addr, sizeof(sockaddr_in6));
91	0	break;
92	0	default: Branch (92:5): [True: 0, False: 0]
93	0	hasher.Write((const unsigned char*)&addr->sa_family, sizeof(addr->sa_family));
94	0	}
95	0	}
96
97		void AddFile(CSHA512& hasher, const char *path)
98	0	{
99	0	struct stat sb = {};
100	0	int f = open(path, O_RDONLY);
101	0	size_t total = 0;
102	0	if (f != -1) { Branch (102:9): [True: 0, False: 0]
103	0	unsigned char fbuf[4096];
104	0	int n;
105	0	hasher.Write((const unsigned char*)&f, sizeof(f));
106	0	if (fstat(f, &sb) == 0) hasher << sb; Branch (106:13): [True: 0, False: 0]
107	0	do {
108	0	n = read(f, fbuf, sizeof(fbuf));
109	0	if (n > 0) hasher.Write(fbuf, n); Branch (109:17): [True: 0, False: 0]
110	0	total += n;
111		/* not bothering with EINTR handling. */
112	0	} while (n == sizeof(fbuf) && total < 1048576); // Read only the first 1 Mbyte Branch (112:18): [True: 0, False: 0] Branch (112:39): [True: 0, False: 0]
113	0	close(f);
114	0	}
115	0	}
116
117		void AddPath(CSHA512& hasher, const char *path)
118	0	{
119	0	struct stat sb = {};
120	0	if (stat(path, &sb) == 0) { Branch (120:9): [True: 0, False: 0]
121	0	hasher.Write((const unsigned char*)path, strlen(path) + 1);
122	0	hasher << sb;
123	0	}
124	0	}
125		#endif
126
127		#ifdef HAVE_SYSCTL
128		template<int... S>
129		void AddSysctl(CSHA512& hasher)
130		{
131		int CTL[sizeof...(S)] = {S...};
132		unsigned char buffer[65536];
133		size_t siz = 65536;
134		int ret = sysctl(CTL, sizeof...(S), buffer, &siz, nullptr, 0);
135		if (ret == 0 \|\| (ret == -1 && errno == ENOMEM)) {
136		hasher << sizeof(CTL);
137		hasher.Write((const unsigned char*)CTL, sizeof(CTL));
138		if (siz > sizeof(buffer)) siz = sizeof(buffer);
139		hasher << siz;
140		hasher.Write(buffer, siz);
141		}
142		}
143		#endif
144
145		#ifdef HAVE_GETCPUID
146		void inline AddCPUID(CSHA512& hasher, uint32_t leaf, uint32_t subleaf, uint32_t& ax, uint32_t& bx, uint32_t& cx, uint32_t& dx)
147	0	{
148	0	GetCPUID(leaf, subleaf, ax, bx, cx, dx);
149	0	hasher << leaf << subleaf << ax << bx << cx << dx;
150	0	}
151
152		void AddAllCPUID(CSHA512& hasher)
153	0	{
154	0	uint32_t ax, bx, cx, dx;
155		// Iterate over all standard leaves
156	0	AddCPUID(hasher, 0, 0, ax, bx, cx, dx); // Returns max leaf in ax
157	0	uint32_t max = ax;
158	0	for (uint32_t leaf = 1; leaf <= max && leaf <= 0xFF; ++leaf) { Branch (158:29): [True: 0, False: 0] Branch (158:44): [True: 0, False: 0]
159	0	uint32_t maxsub = 0;
160	0	for (uint32_t subleaf = 0; subleaf <= 0xFF; ++subleaf) { Branch (160:36): [True: 0, False: 0]
161	0	AddCPUID(hasher, leaf, subleaf, ax, bx, cx, dx);
162		// Iterate subleafs for leaf values 4, 7, 11, 13
163	0	if (leaf == 4) { Branch (163:17): [True: 0, False: 0]
164	0	if ((ax & 0x1f) == 0) break; Branch (164:21): [True: 0, False: 0]
165	0	} else if (leaf == 7) { Branch (165:24): [True: 0, False: 0]
166	0	if (subleaf == 0) maxsub = ax; Branch (166:21): [True: 0, False: 0]
167	0	if (subleaf == maxsub) break; Branch (167:21): [True: 0, False: 0]
168	0	} else if (leaf == 11) { Branch (168:24): [True: 0, False: 0]
169	0	if ((cx & 0xff00) == 0) break; Branch (169:21): [True: 0, False: 0]
170	0	} else if (leaf == 13) { Branch (170:24): [True: 0, False: 0]
171	0	if (ax == 0 && bx == 0 && cx == 0 && dx == 0) break; Branch (171:21): [True: 0, False: 0] Branch (171:32): [True: 0, False: 0] Branch (171:43): [True: 0, False: 0] Branch (171:54): [True: 0, False: 0]
172	0	} else {
173		// For any other leaf, stop after subleaf 0.
174	0	break;
175	0	}
176	0	}
177	0	}
178		// Iterate over all extended leaves
179	0	AddCPUID(hasher, 0x80000000, 0, ax, bx, cx, dx); // Returns max extended leaf in ax
180	0	uint32_t ext_max = ax;
181	0	for (uint32_t leaf = 0x80000001; leaf <= ext_max && leaf <= 0x800000FF; ++leaf) { Branch (181:38): [True: 0, False: 0] Branch (181:57): [True: 0, False: 0]
182	0	AddCPUID(hasher, leaf, 0, ax, bx, cx, dx);
183	0	}
184	0	}
185		#endif
186		} // namespace
187
188		void RandAddDynamicEnv(CSHA512& hasher)
189	0	{
190		// Various clocks
191		#ifdef WIN32
192		FILETIME ftime;
193		GetSystemTimeAsFileTime(&ftime);
194		hasher << ftime;
195		#else
196	0	struct timespec ts = {};
197	0	# ifdef CLOCK_MONOTONIC
198	0	clock_gettime(CLOCK_MONOTONIC, &ts);
199	0	hasher << ts;
200	0	# endif
201	0	# ifdef CLOCK_REALTIME
202	0	clock_gettime(CLOCK_REALTIME, &ts);
203	0	hasher << ts;
204	0	# endif
205	0	# ifdef CLOCK_BOOTTIME
206	0	clock_gettime(CLOCK_BOOTTIME, &ts);
207	0	hasher << ts;
208	0	# endif
209		// gettimeofday is available on all UNIX systems, but only has microsecond precision.
210	0	struct timeval tv = {};
211	0	gettimeofday(&tv, nullptr);
212	0	hasher << tv;
213	0	#endif
214		// Probably redundant, but also use all the standard library clocks:
215	0	hasher << std::chrono::system_clock::now().time_since_epoch().count();
216	0	hasher << std::chrono::steady_clock::now().time_since_epoch().count();
217	0	hasher << std::chrono::high_resolution_clock::now().time_since_epoch().count();
218
219	0	#ifndef WIN32
220		// Current resource usage.
221	0	struct rusage usage = {};
222	0	if (getrusage(RUSAGE_SELF, &usage) == 0) hasher << usage; Branch (222:9): [True: 0, False: 0]
223	0	#endif
224
225	0	#ifdef __linux__
226	0	AddFile(hasher, "/proc/diskstats");
227	0	AddFile(hasher, "/proc/vmstat");
228	0	AddFile(hasher, "/proc/schedstat");
229	0	AddFile(hasher, "/proc/zoneinfo");
230	0	AddFile(hasher, "/proc/meminfo");
231	0	AddFile(hasher, "/proc/softirqs");
232	0	AddFile(hasher, "/proc/stat");
233	0	AddFile(hasher, "/proc/self/schedstat");
234	0	AddFile(hasher, "/proc/self/status");
235	0	#endif
236
237		#ifdef HAVE_SYSCTL
238		# ifdef CTL_KERN
239		# if defined(KERN_PROC) && defined(KERN_PROC_ALL)
240		AddSysctl<CTL_KERN, KERN_PROC, KERN_PROC_ALL>(hasher);
241		# endif
242		# endif
243		# ifdef CTL_HW
244		# ifdef HW_DISKSTATS
245		AddSysctl<CTL_HW, HW_DISKSTATS>(hasher);
246		# endif
247		# endif
248		# ifdef CTL_VM
249		# ifdef VM_LOADAVG
250		AddSysctl<CTL_VM, VM_LOADAVG>(hasher);
251		# endif
252		# ifdef VM_TOTAL
253		AddSysctl<CTL_VM, VM_TOTAL>(hasher);
254		# endif
255		# ifdef VM_METER
256		AddSysctl<CTL_VM, VM_METER>(hasher);
257		# endif
258		# endif
259		#endif
260
261		// Stack and heap location
262	0	void* addr = malloc(4097);
263	0	hasher << &addr << addr;
264	0	free(addr);
265	0	}
266
267		void RandAddStaticEnv(CSHA512& hasher)
268	0	{
269		// Some compile-time static properties
270	0	hasher << (CHAR_MIN < 0) << sizeof(void*) << sizeof(long) << sizeof(int);
271	0	#if defined(__GNUC__) && defined(__GNUC_MINOR__) && defined(__GNUC_PATCHLEVEL__)
272	0	hasher << __GNUC__ << __GNUC_MINOR__ << __GNUC_PATCHLEVEL__;
273	0	#endif
274		#ifdef _MSC_VER
275		hasher << _MSC_VER;
276		#endif
277	0	hasher << __cplusplus;
278	0	#ifdef _XOPEN_VERSION
279	0	hasher << _XOPEN_VERSION;
280	0	#endif
281	0	#ifdef __VERSION__
282	0	const char* COMPILER_VERSION = __VERSION__;
283	0	hasher.Write((const unsigned char*)COMPILER_VERSION, strlen(COMPILER_VERSION) + 1);
284	0	#endif
285
286		// Bitcoin client version
287	0	hasher << CLIENT_VERSION;
288
289	0	#if defined(HAVE_STRONG_GETAUXVAL)
290		// Information available through getauxval()
291	0	# ifdef AT_HWCAP
292	0	hasher << getauxval(AT_HWCAP);
293	0	# endif
294	0	# ifdef AT_HWCAP2
295	0	hasher << getauxval(AT_HWCAP2);
296	0	# endif
297	0	# ifdef AT_RANDOM
298	0	const unsigned char* random_aux = (const unsigned char*)getauxval(AT_RANDOM);
299	0	if (random_aux) hasher.Write(random_aux, 16); Branch (299:9): [True: 0, False: 0]
300	0	# endif
301	0	# ifdef AT_PLATFORM
302	0	const char* platform_str = (const char*)getauxval(AT_PLATFORM);
303	0	if (platform_str) hasher.Write((const unsigned char*)platform_str, strlen(platform_str) + 1); Branch (303:9): [True: 0, False: 0]
304	0	# endif
305	0	# ifdef AT_EXECFN
306	0	const char* exec_str = (const char*)getauxval(AT_EXECFN);
307	0	if (exec_str) hasher.Write((const unsigned char*)exec_str, strlen(exec_str) + 1); Branch (307:9): [True: 0, False: 0]
308	0	# endif
309	0	#endif // HAVE_STRONG_GETAUXVAL
310
311	0	#ifdef HAVE_GETCPUID
312	0	AddAllCPUID(hasher);
313	0	#endif
314
315		// Memory locations
316	0	hasher << &hasher << &RandAddStaticEnv << &malloc << &errno << &environ;
317
318		// Hostname
319		#ifdef WIN32
320		constexpr DWORD max_size = MAX_COMPUTERNAME_LENGTH + 1;
321		char hname[max_size];
322		DWORD size = max_size;
323		if (GetComputerNameA(hname, &size) != 0) {
324		hasher.Write(UCharCast(hname), size);
325		}
326		#else
327	0	char hname[256];
328	0	if (gethostname(hname, 256) == 0) { Branch (328:9): [True: 0, False: 0]
329	0	hasher.Write((const unsigned char*)hname, strnlen(hname, 256));
330	0	}
331	0	#endif
332
333	0	#if HAVE_DECL_GETIFADDRS && HAVE_DECL_FREEIFADDRS
334		// Network interfaces
335	0	struct ifaddrs *ifad = nullptr;
336	0	getifaddrs(&ifad);
337	0	struct ifaddrs *ifit = ifad;
338	0	while (ifit != nullptr) { Branch (338:12): [True: 0, False: 0]
339	0	hasher.Write((const unsigned char*)&ifit, sizeof(ifit));
340	0	hasher.Write((const unsigned char*)ifit->ifa_name, strlen(ifit->ifa_name) + 1);
341	0	hasher.Write((const unsigned char*)&ifit->ifa_flags, sizeof(ifit->ifa_flags));
342	0	AddSockaddr(hasher, ifit->ifa_addr);
343	0	AddSockaddr(hasher, ifit->ifa_netmask);
344	0	AddSockaddr(hasher, ifit->ifa_dstaddr);
345	0	ifit = ifit->ifa_next;
346	0	}
347	0	freeifaddrs(ifad);
348	0	#endif
349
350	0	#ifndef WIN32
351		// UNIX kernel information
352	0	struct utsname name;
353	0	if (uname(&name) != -1) { Branch (353:9): [True: 0, False: 0]
354	0	hasher.Write((const unsigned char*)&name.sysname, strlen(name.sysname) + 1);
355	0	hasher.Write((const unsigned char*)&name.nodename, strlen(name.nodename) + 1);
356	0	hasher.Write((const unsigned char*)&name.release, strlen(name.release) + 1);
357	0	hasher.Write((const unsigned char*)&name.version, strlen(name.version) + 1);
358	0	hasher.Write((const unsigned char*)&name.machine, strlen(name.machine) + 1);
359	0	}
360
361		/* Path and filesystem provided data */
362	0	AddPath(hasher, "/");
363	0	AddPath(hasher, ".");
364	0	AddPath(hasher, "/tmp");
365	0	AddPath(hasher, "/home");
366	0	AddPath(hasher, "/proc");
367	0	#ifdef __linux__
368	0	AddFile(hasher, "/proc/cmdline");
369	0	AddFile(hasher, "/proc/cpuinfo");
370	0	AddFile(hasher, "/proc/version");
371	0	#endif
372	0	AddFile(hasher, "/etc/passwd");
373	0	AddFile(hasher, "/etc/group");
374	0	AddFile(hasher, "/etc/hosts");
375	0	AddFile(hasher, "/etc/resolv.conf");
376	0	AddFile(hasher, "/etc/timezone");
377	0	AddFile(hasher, "/etc/localtime");
378	0	#endif
379
380		// For MacOS/BSDs, gather data through sysctl instead of /proc. Not all of these
381		// will exist on every system.
382		#ifdef HAVE_SYSCTL
383		# ifdef CTL_HW
384		# ifdef HW_MACHINE
385		AddSysctl<CTL_HW, HW_MACHINE>(hasher);
386		# endif
387		# ifdef HW_MODEL
388		AddSysctl<CTL_HW, HW_MODEL>(hasher);
389		# endif
390		# ifdef HW_NCPU
391		AddSysctl<CTL_HW, HW_NCPU>(hasher);
392		# endif
393		# ifdef HW_PHYSMEM
394		AddSysctl<CTL_HW, HW_PHYSMEM>(hasher);
395		# endif
396		# ifdef HW_USERMEM
397		AddSysctl<CTL_HW, HW_USERMEM>(hasher);
398		# endif
399		# ifdef HW_MACHINE_ARCH
400		AddSysctl<CTL_HW, HW_MACHINE_ARCH>(hasher);
401		# endif
402		# ifdef HW_REALMEM
403		AddSysctl<CTL_HW, HW_REALMEM>(hasher);
404		# endif
405		# ifdef HW_CPU_FREQ
406		AddSysctl<CTL_HW, HW_CPU_FREQ>(hasher);
407		# endif
408		# ifdef HW_BUS_FREQ
409		AddSysctl<CTL_HW, HW_BUS_FREQ>(hasher);
410		# endif
411		# ifdef HW_CACHELINE
412		AddSysctl<CTL_HW, HW_CACHELINE>(hasher);
413		# endif
414		# endif
415		# ifdef CTL_KERN
416		# ifdef KERN_BOOTFILE
417		AddSysctl<CTL_KERN, KERN_BOOTFILE>(hasher);
418		# endif
419		# ifdef KERN_BOOTTIME
420		AddSysctl<CTL_KERN, KERN_BOOTTIME>(hasher);
421		# endif
422		# ifdef KERN_CLOCKRATE
423		AddSysctl<CTL_KERN, KERN_CLOCKRATE>(hasher);
424		# endif
425		# ifdef KERN_HOSTID
426		AddSysctl<CTL_KERN, KERN_HOSTID>(hasher);
427		# endif
428		# ifdef KERN_HOSTUUID
429		AddSysctl<CTL_KERN, KERN_HOSTUUID>(hasher);
430		# endif
431		# ifdef KERN_HOSTNAME
432		AddSysctl<CTL_KERN, KERN_HOSTNAME>(hasher);
433		# endif
434		# ifdef KERN_OSRELDATE
435		AddSysctl<CTL_KERN, KERN_OSRELDATE>(hasher);
436		# endif
437		# ifdef KERN_OSRELEASE
438		AddSysctl<CTL_KERN, KERN_OSRELEASE>(hasher);
439		# endif
440		# ifdef KERN_OSREV
441		AddSysctl<CTL_KERN, KERN_OSREV>(hasher);
442		# endif
443		# ifdef KERN_OSTYPE
444		AddSysctl<CTL_KERN, KERN_OSTYPE>(hasher);
445		# endif
446		# ifdef KERN_POSIX1
447		AddSysctl<CTL_KERN, KERN_OSREV>(hasher);
448		# endif
449		# ifdef KERN_VERSION
450		AddSysctl<CTL_KERN, KERN_VERSION>(hasher);
451		# endif
452		# endif
453		#endif
454
455		// Env variables
456	0	if (environ) { Branch (456:9): [True: 0, False: 0]
457	0	for (size_t i = 0; environ[i]; ++i) { Branch (457:28): [True: 0, False: 0]
458	0	hasher.Write((const unsigned char*)environ[i], strlen(environ[i]));
459	0	}
460	0	}
461
462		// Process, thread, user, session, group, ... ids.
463		#ifdef WIN32
464		hasher << GetCurrentProcessId() << GetCurrentThreadId();
465		#else
466	0	hasher << getpid() << getppid() << getsid(0) << getpgid(0) << getuid() << geteuid() << getgid() << getegid();
467	0	#endif
468	0	hasher << std::this_thread::get_id();
469	0	}