when building against OpenSSL, require at least version 1.1.1

Author: arvidn

ChangeLog

@@ -1,5 +1,6 @@
 2.0.12
 
+	* when building against OpenSSL, require at least version 1.1.1
 	* add setting to set no-copy-on-write flag on new files
 	* add performance counters to file pool
 	* add high_priority flag to torrent_handle::force_reannounce()

include/libtorrent/ssl.hpp

@@ -54,8 +54,8 @@ POSSIBILITY OF SUCH DAMAGE.
 
 #ifdef TORRENT_USE_OPENSSL
 #include <openssl/opensslv.h> // for OPENSSL_VERSION_NUMBER
-#if OPENSSL_VERSION_NUMBER < 0x1000000fL
-#error OpenSSL too old, use a recent version with SNI support
+#if OPENSSL_VERSION_NUMBER < 0x1010100fL
+#error OpenSSL too old, libtorrent requires least OpenSSL 1.1.1 or later
 #endif
 #ifdef TORRENT_WINDOWS
 // because openssl includes winsock.h, we must include winsock2.h first

src/ssl.cpp

@@ -178,31 +178,7 @@ namespace {
 	{
 		lifecycle()
 		{
-			// this is needed for openssl < 1.0 to decrypt keys created by openssl 1.0+
-#if !defined(OPENSSL_API_COMPAT) || (OPENSSL_API_COMPAT < 0x10100000L)
-			OpenSSL_add_all_algorithms();
-#else
 			OPENSSL_init_crypto(OPENSSL_INIT_ADD_ALL_CIPHERS | OPENSSL_INIT_ADD_ALL_DIGESTS, nullptr);
-#endif
-		}
-
-		~lifecycle()
-		{
-// by openssl changelog at https://www.openssl.org/news/changelog.html
-// Changes between 1.0.2h and 1.1.0  [25 Aug 2016]
-// - Most global cleanup functions are no longer required because they are handled
-//   via auto-deinit. Affected function CRYPTO_cleanup_all_ex_data()
-#if !defined(OPENSSL_API_COMPAT) || OPENSSL_API_COMPAT < 0x10100000L
-#ifdef TORRENT_MACOS_DEPRECATED_LIBCRYPTO
-#pragma clang diagnostic push
-#pragma clang diagnostic ignored "-Wdeprecated-declarations"
-#endif
-			// openssl requires this to clean up internal structures it allocates
-			CRYPTO_cleanup_all_ex_data();
-#ifdef TORRENT_MACOS_DEPRECATED_LIBCRYPTO
-#pragma clang diagnostic pop
-#endif
-#endif
 		}
 	} global;
 }