diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/init.cpp | 4 | ||||
| -rw-r--r-- | src/test/sanity_tests.cpp | 2 | ||||
| -rw-r--r-- | src/util/time.cpp | 63 | ||||
| -rw-r--r-- | src/util/time.h | 3 |
4 files changed, 63 insertions, 9 deletions
diff --git a/src/init.cpp b/src/init.cpp index 96fb32ce2a..3beb421bf9 100644 --- a/src/init.cpp +++ b/src/init.cpp @@ -773,6 +773,10 @@ static bool InitSanityCheck() return InitError(Untranslated("OS cryptographic RNG sanity check failure. Aborting.")); } + if (!ChronoSanityCheck()) { + return InitError(Untranslated("Clock epoch mismatch. Aborting.")); + } + return true; } diff --git a/src/test/sanity_tests.cpp b/src/test/sanity_tests.cpp index 740b2c72db..3e4b963fe3 100644 --- a/src/test/sanity_tests.cpp +++ b/src/test/sanity_tests.cpp @@ -5,6 +5,7 @@ #include <compat/sanity.h> #include <key.h> #include <test/util/setup_common.h> +#include <util/time.h> #include <boost/test/unit_test.hpp> @@ -15,6 +16,7 @@ BOOST_AUTO_TEST_CASE(basic_sanity) BOOST_CHECK_MESSAGE(glibc_sanity_test() == true, "libc sanity test"); BOOST_CHECK_MESSAGE(glibcxx_sanity_test() == true, "stdlib sanity test"); BOOST_CHECK_MESSAGE(ECC_InitSanityCheck() == true, "secp256k1 sanity test"); + BOOST_CHECK_MESSAGE(ChronoSanityCheck() == true, "chrono epoch test"); } BOOST_AUTO_TEST_SUITE_END() diff --git a/src/util/time.cpp b/src/util/time.cpp index 7b0eb8fd8e..e6f0986a39 100644 --- a/src/util/time.cpp +++ b/src/util/time.cpp @@ -33,6 +33,49 @@ int64_t GetTime() return now; } +bool ChronoSanityCheck() +{ + // std::chrono::system_clock.time_since_epoch and time_t(0) are not guaranteed + // to use the Unix epoch timestamp, prior to C++20, but in practice they almost + // certainly will. Any differing behavior will be assumed to be an error, unless + // certain platforms prove to consistently deviate, at which point we'll cope + // with it by adding offsets. + + // Create a new clock from time_t(0) and make sure that it represents 0 + // seconds from the system_clock's time_since_epoch. Then convert that back + // to a time_t and verify that it's the same as before. + const time_t time_t_epoch{}; + auto clock = std::chrono::system_clock::from_time_t(time_t_epoch); + if (std::chrono::duration_cast<std::chrono::seconds>(clock.time_since_epoch()).count() != 0) { + return false; + } + + time_t time_val = std::chrono::system_clock::to_time_t(clock); + if (time_val != time_t_epoch) { + return false; + } + + // Check that the above zero time is actually equal to the known unix timestamp. + struct tm epoch; +#ifdef HAVE_GMTIME_R + if (gmtime_r(&time_val, &epoch) == nullptr) { +#else + if (gmtime_s(&epoch, &time_val) != 0) { +#endif + return false; + } + + if ((epoch.tm_sec != 0) || + (epoch.tm_min != 0) || + (epoch.tm_hour != 0) || + (epoch.tm_mday != 1) || + (epoch.tm_mon != 0) || + (epoch.tm_year != 70)) { + return false; + } + return true; +} + template <typename T> T GetTime() { @@ -47,6 +90,14 @@ template std::chrono::seconds GetTime(); template std::chrono::milliseconds GetTime(); template std::chrono::microseconds GetTime(); +template <typename T> +static T GetSystemTime() +{ + const auto now = std::chrono::duration_cast<T>(std::chrono::system_clock::now().time_since_epoch()); + assert(now.count() > 0); + return now; +} + void SetMockTime(int64_t nMockTimeIn) { Assert(nMockTimeIn >= 0); @@ -65,23 +116,17 @@ std::chrono::seconds GetMockTime() int64_t GetTimeMillis() { - int64_t now = (boost::posix_time::microsec_clock::universal_time() - - boost::posix_time::ptime(boost::gregorian::date(1970,1,1))).total_milliseconds(); - assert(now > 0); - return now; + return int64_t{GetSystemTime<std::chrono::milliseconds>().count()}; } int64_t GetTimeMicros() { - int64_t now = (boost::posix_time::microsec_clock::universal_time() - - boost::posix_time::ptime(boost::gregorian::date(1970,1,1))).total_microseconds(); - assert(now > 0); - return now; + return int64_t{GetSystemTime<std::chrono::microseconds>().count()}; } int64_t GetSystemTimeInSeconds() { - return GetTimeMicros()/1000000; + return int64_t{GetSystemTime<std::chrono::seconds>().count()}; } std::string FormatISO8601DateTime(int64_t nTime) { diff --git a/src/util/time.h b/src/util/time.h index c4f930781a..56131ce0fe 100644 --- a/src/util/time.h +++ b/src/util/time.h @@ -79,4 +79,7 @@ struct timeval MillisToTimeval(int64_t nTimeout); */ struct timeval MillisToTimeval(std::chrono::milliseconds ms); +/** Sanity check epoch match normal Unix epoch */ +bool ChronoSanityCheck(); + #endif // BITCOIN_UTIL_TIME_H |