TLS work:

* namespac etls
* Portable tls::context
* OpenSSL implementation and library
* WolfSSL and OpenSSL adopt tls::context data

Author: vinniefalco

CMakeLists.txt

@@ -208,6 +208,28 @@ if (WolfSSL_FOUND)
     target_compile_definitions(boost_corosio_wolfssl PUBLIC BOOST_COROSIO_HAS_WOLFSSL)
 endif ()
 
+#-------------------------------------------------
+#
+# OpenSSL
+#
+#-------------------------------------------------
+find_package(OpenSSL)
+if (OpenSSL_FOUND)
+    file(GLOB_RECURSE BOOST_COROSIO_OPENSSL_HEADERS CONFIGURE_DEPENDS
+        "${CMAKE_CURRENT_SOURCE_DIR}/include/boost/corosio/openssl/*.hpp")
+    file(GLOB_RECURSE BOOST_COROSIO_OPENSSL_SOURCES CONFIGURE_DEPENDS
+        "${CMAKE_CURRENT_SOURCE_DIR}/src/openssl/src/*.hpp"
+        "${CMAKE_CURRENT_SOURCE_DIR}/src/openssl/src/*.cpp")
+    source_group(TREE "${CMAKE_CURRENT_SOURCE_DIR}/include/boost/corosio/openssl" PREFIX "include" FILES ${BOOST_COROSIO_OPENSSL_HEADERS})
+    source_group(TREE "${CMAKE_CURRENT_SOURCE_DIR}/src/openssl/src" PREFIX "src" FILES ${BOOST_COROSIO_OPENSSL_SOURCES})
+    add_library(boost_corosio_openssl ${BOOST_COROSIO_OPENSSL_HEADERS} ${BOOST_COROSIO_OPENSSL_SOURCES})
+    add_library(Boost::corosio_openssl ALIAS boost_corosio_openssl)
+    boost_corosio_setup_properties(boost_corosio_openssl)
+    target_link_libraries(boost_corosio_openssl PUBLIC boost_corosio)
+    target_link_libraries(boost_corosio_openssl PRIVATE OpenSSL::SSL OpenSSL::Crypto)
+    target_compile_definitions(boost_corosio_openssl PUBLIC BOOST_COROSIO_HAS_OPENSSL)
+endif ()
+
 #-------------------------------------------------
 #
 # Tests

doc/modules/ROOT/nav.adoc

@@ -4,6 +4,7 @@
 ** xref:tutorials/echo-server.adoc[Echo Server]
 ** xref:tutorials/http-client.adoc[HTTP Client]
 ** xref:tutorials/dns-lookup.adoc[DNS Lookup]
+** xref:tutorials/tls-context.adoc[TLS Context Configuration]
 * Guide
 ** xref:guide/tcp-networking.adoc[TCP/IP Networking]
 ** xref:guide/concurrent-programming.adoc[Concurrent Programming]

doc/modules/ROOT/pages/guide/tls.adoc

@@ -15,7 +15,7 @@ It wraps an existing stream (like `socket`) and provides encrypted I/O.
 NOTE: Code snippets assume:
 [source,cpp]
 ----
-#include <boost/corosio/wolfssl_stream.hpp>
+#include <boost/corosio/tls/wolfssl_stream.hpp>
 #include <boost/corosio/socket.hpp>
 
 namespace corosio = boost::corosio;

doc/modules/ROOT/pages/tutorials/http-client.adoc

@@ -217,7 +217,7 @@ To make HTTPS requests, wrap the socket in a `wolfssl_stream`:
 
 [source,cpp]
 ----
-#include <boost/corosio/wolfssl_stream.hpp>
+#include <boost/corosio/tls/wolfssl_stream.hpp>
 
 capy::task<void> run_https_client(
     corosio::io_context& ioc,