Tool Command Language (TCL) Transport Layer Security (TLS) Extension Intro ===== This package provides an extension which implements Secure Socket Layer (SSL) and Transport Layer Security (TLS) over Transmission Control Protocol (TCP) network communication channels. It utilizes either the OpenSSL software library. Version 1.9 also provides a cryptography library providing TCL scripts access to the crypto capabilities of the OpenSSL library. Description =========== This extension works by creating a layered TCL Channel on top of an existing bi-directional channel created by the TLS socket command. All existing socket functionality is supported, in addition to several new options. Both client and server modes are supported. Documentation ============= See the doc directory for the full usage documentation. Compatibility ============= This package requires TCL 8.5 or later. This package is compatible with: - OpenSSL v1.1.1 or later. See (http://www.openssl.org/ Installation ============ This package uses the Tcl Extension Architecture (TEA) to build and install on any supported Unix, Mac, or MS Windows system. Either the OpenSSL software libraries must be built and available prior to building TCL TLS. UNIX and Linux -------------- The standard TEA config, make and install process is supported. $ cd tcltls $ ./configure --enable-64bit $ make $ make test $ make install The supported configure options include all of the standard TEA configure script options, plus: --disable-tls1 disable TLS1 protocol --disable-tls1_1 disable TLS1.1 protocol --disable-tls1_2 disable TLS1.2 protocol --disable-tls1_3 disable TLS1.3 protocol --enable-debug enable debugging mode and output more status --enable-ssl-fastpath enable using the underlying file descriptor for talking directly to the SSL library --enable-hardening enable hardening attempts --enable-static-ssl enable static linking to the SSL library If either TCL or OpenSSL are installed in non-standard locations, the following configure options are available. For all options, see ./configure --help. --with-tcl= path to where tclCondig.sh file resides --with-tclinclude= directory containing the public Tcl header files --with-openssl-dir= path to root directory of OpenSSL installation --with-openssl-includedir= path to include directory of OpenSSL installation --with-openssl-libdir= path to lib directory of OpenSSL installation --with-openssl-pkgconfig= path to root directory of OpenSSL pkg-config directory MacOS ----- The standard TEA installation process is supported. Use the --with-tcl option to set the TCL path if the ActiveState or other non-Apple version of TCL is to be used. $ cd tcltls $ ./configure --with-tcl=/Library/Frameworks/Tcl.framework/ $ make $ make test $ make install Windows ------- If installing with MinGW, use the TEA build process. If using MS Visual C (MSVC), see the win/README.txt file for the installation instructions. Other ----- If OpenSSL is not installed on the system, the Certificate Authority (CA) provided certificates must be downloaded and installed with the software. The CURL team makes them available at https://curl.se/docs/caextract.html. Look for the cacert.pem file. Copyrights ========== Original TLS Copyright (C) 1997-2000 Matt Newman TLS 1.4.1 Copyright (C) 2000 Ajuba Solutions TLS 1.6 Copyright (C) 2008 ActiveState Software Inc. TLS 1.7 Copyright (C) 2016 Matt Newman, Ajuba Solutions, ActiveState Software Inc, Roy Keene TLS 1.8 Copyright (C) 2023 Brian O'Hagan Acknowledgments =============== Non-exclusive credits for TLS are: Original work: Matt Newman @ Novadigm Updates: Jeff Hobbs @ ActiveState Tcl Channel mechanism: Andreas Kupries Impetus/Related work: tclSSL (Colin McCormack, Shared Technology) SSLtcl (Peter Antman) License ======= This code is licensed under the same terms as the Tcl Core.