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remove calls to RAND_add 

This function has been removed from LibreSSL and offers dubious value.
The PRNGs in modern operating systems are robust enough that these little extra
bits arn't going to make a difference.
This commit is contained in:
Steven Siloti 2017-04-15 16:02:18 -07:00 committed by Arvid Norberg
parent cef9773c70
commit 969c0167d4
3 changed files with 0 additions and 34 deletions
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14
src/peer_connection.cpp
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@ -5945,20 +5945,6 @@ namespace libtorrent {
} }
#endif #endif
#ifdef TORRENT_USE_OPENSSL
#ifdef TORRENT_MACOS_DEPRECATED_LIBCRYPTO
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wdeprecated-declarations"
#endif
// add this RTT to the PRNG seed, to add more unpredictability
std::int64_t now = total_microseconds(completed - m_connect);
// assume 12 bits of entropy (i.e. about 8 milliseconds)
RAND_add(&now, 8, 1.5);
#ifdef TORRENT_MACOS_DEPRECATED_LIBCRYPTO
#pragma clang diagnostic pop
#endif
#endif
// if t is nullptr, we better not be connecting, since // if t is nullptr, we better not be connecting, since
// we can't decrement the connecting counter // we can't decrement the connecting counter
std::shared_ptr<torrent> t = m_torrent.lock(); std::shared_ptr<torrent> t = m_torrent.lock();

14
src/session_impl.cpp
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@ -2513,20 +2513,6 @@ namespace {
{ {
TORRENT_ASSERT(is_single_thread()); TORRENT_ASSERT(is_single_thread());
#ifdef TORRENT_USE_OPENSSL
#ifdef TORRENT_MACOS_DEPRECATED_LIBCRYPTO
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wdeprecated-declarations"
#endif
// add the current time to the PRNG, to add more unpredictability
std::int64_t now = clock_type::now().time_since_epoch().count();
// assume 12 bits of entropy (i.e. about 8 milliseconds)
RAND_add(&now, 8, 1.5);
#ifdef TORRENT_MACOS_DEPRECATED_LIBCRYPTO
#pragma clang diagnostic pop
#endif
#endif // TORRENT_USE_OPENSSL
if (m_paused) if (m_paused)
{ {
#ifndef TORRENT_DISABLE_LOGGING #ifndef TORRENT_DISABLE_LOGGING

6
src/torrent.cpp
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@ -1473,12 +1473,6 @@ namespace libtorrent {
// this is needed for openssl < 1.0 to decrypt keys created by openssl 1.0+ // this is needed for openssl < 1.0 to decrypt keys created by openssl 1.0+
OpenSSL_add_all_algorithms(); OpenSSL_add_all_algorithms();
std::int64_t const now = clock_type::now().time_since_epoch().count();
// assume 9 bits of entropy (i.e. about 1 millisecond)
RAND_add(&now, 8, 1.125);
RAND_add(&info_hash()[0], 20, 3);
// entropy is also added on incoming and completed connection attempts
TORRENT_ASSERT(RAND_status() == 1); TORRENT_ASSERT(RAND_status() == 1);
// create the SSL context for this torrent. We need to // create the SSL context for this torrent. We need to