ICS Download

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ICS is available as source code only. You need Delphi to build the sample programs and create your own application.

ICS versions available:

  • ICS-V9 for Delphi 7 to Delphi 12 / C++ Builder 10.2 to 12, FireMonkey cross platform support for POSIX/MacOS (long term support release, 32 and 64-bit).
  • ICS-V8 for Delphi 7 to Delphi 11 (stable release, no new development, please upgrade to V9).
  • ICS-V7 for Delphi 7 / C++ Builder 2006 to Delphi / C++ Builder XE3 (discontinued and obsolete, please upgrade to V9).
  • ICS-V6 for Delphi 7 / C++ Builder 2006 to Delphi / C++ Builder 2007 (discontinued and obsolete, please upgrade to V9 if you do not have to support Windows versions < W2K).
  • ICS-V5 for Delphi / BCB 1 to Delphi / C++ Builder 2007 and Delphi .NET (discontinued and obsolete, please upgrade to V9).

ICS News

Changes in ICS V9.4 include:

  1. Completed the ICS Application Monitoring system added in V9.3, designed to locally and remotely monitor ICS servers and applications, and to locally restart applications on demand or if they crash. It comprises a small TIcsAppMonCli client monitoring component that is added to ICS applications, usually Windows Servers, but also client applications. This client component communicates with a TIcsAppMonSrv server component, usually running as a Windows Service on the same server so it is able to restart applications, but can also support clients on a LAN. The monitoring server has web and Websocket servers, allowing remote browsers to view the state of all applications being monitored by the server with a continually updated web page. There is also ICS Application Monitor - Remote Manager application that provides remote monitoring of multiple ICS Application Monitor servers using Json web and Websocket requests on a single screen.
  2. The SMTP client component fixes a bug introduced in V9.3 which could corrupt the Content-Transfer-Encoding header line.
  3. TWSocket, fixed a potential problem using multiple threads where a new connection opened very quickly (ie localhost) and then stalled due to an unexpected connection state. Made DataToString Unicode compatible, only used for diagnostic dump logs.
  4. In the HTTP client, fixed a check for an overflowing buffer when receiving very long headers that could cause failure detecting headers end. Made several URL validation functions public: GetProtocolPort, IsSSLProtocol, IsKnownProtocol and IsKnownProtocolURL.
  5. When creating PKCS12/PFX certificates, change the 3DES cipher to AES256 if the legacy provider is not loaded.
  6. In the TIcsFtpMulti component, skip download of zero length file by creating an empty file, previously this got SSL handshake error. Don't report directories as being downloadable, they are not. If extended passive mode allowed, send EPSV ALL at start so firewalls and NAT routers can handle sessions more efficiently. Added CheckBadUnicode property defaults to false, so that checks for bad Unicode to Ansi conversions with ? are skipped, allowing more complex paths without errors.
  7. The FTP server FEAT request now returns EPRT and EPSV which have been supported for IPv6 for years, but were not advertised for IPv4.
  8. The OverbyteIcsSnippets sample adds two new simple REST snippets to Get/Post Parameters that send them to an ICS server, and the server echoes back those params so you can check what was actually sent.
  9. When loading the OpenSSL DLLs, no longer check they are digitally signed for Windows XP, 2003, Vista and 2008, they don't recognise SHA-256 code signing, never tested since no longer have those old versions available.
  10. The TRestParams method AddItemSO to add a SuperObject now has an Escape parameter defaulting to True, so non-ASCII characters are escaped by default.
  11. The Proxy component TProxyTarget now has a SocketFamily property so target connections can be restricted to TSocketFamily values. Added property SrvTotSess count of server session connections for logging.
  12. In the HTTP Application Web Server, fixed a memory leak with multiple virtual PUT and POST documents.
  13. The OverbyteIcsJoseTst sample 'Sign/Verify Data' tests now support hashes other than SHA-256, selected from the Key and Signing Hash Algorithm drop down list. Also, a private key matching that selection is created automatically, including X25519.
  14. There is a new unit OverbyteIcsWinUtils that contains Windows API functions, built from selected Magenta Systems libraries, with functions needed to build and control Windows Service applications, accessing the Windows registry, Windows firewall, Windows tasks, hardware, and with simple encryption for passwords. Most of these functions are used by the TIcsAppMonSrv server component and IcsAppMon sample, but should have much wider use for Windows Service server applications in particular, like allowing firewall access. It's planned to move most other Windows specific function here for ICS V10.
  15. In the ICMP component, fixed a problem setting property PingMsg to the text to ping.
  16. In the TIcsIpStrmLog component, added method ListenStates which for logprotUdpServer and logprotTcpServer returns a multiline string listing the IP, port, SSL and state of all socket listeners. The CurSockets property now reflects actual TCP Server clients.
  17. In the TIcsMailQueue component, don't keep retrying email that is too short to send with no body or with no sender headers. Added more error handling if the SMTP component fails to build the EML spool file.
  18. In OverbyteIcsUtils, finished the cleanup of old Base64 functions by adding new IcsBase64 functions using TBytes internally to replace old Base64 functions that used AnsiChars, with no overloaded versions for simplicity. Old Base64 versions retained as deprecated for user applications, please update to the IcsBase versions. Added IcsTBytesCompare to compare two TBytes. Added IcsOutputDebugStr for Posix and Windows. Added IcsDateToAStr and IcsDateTimeToAStr with alpha month (Jan/Feb).
  19. The ICS C++ packages for C++ 10.4 and later have been updated with the correct paths for the three supported platforms, and all build and install correctly for Win32. Win64 should also build, but not Win64x Modern which needs fixes in a future release of C++ 12.

Changes in ICS V9.3 include:

  1. V9.3 continues the simplification of use of ICS components by consolidating many types and constants into the OverbyteIcsTypes unit, avoiding projects needing to find and add specific units before they will build. For XE2 and later, OverbyteIcsTypes and OverbyteIcsSslBase will be added automatically when components needing them are dropped on a form, or that form accessed for existing projects. One benefit of this change is removing dependence on several units for many components and applications, it should be possible to remove OverbyteIcsWinsock, OverbyteIcsLIBEAY, OverbyteIcsSSLEAY and OverbyteIcsLogger from most applications, and also other units. See https://wiki.overbyte.eu/wiki/index.php?title=Updating_projects_to_V9.3 for more information.
  2. Previously, the Windows Certificate Store was supported on Windows for all components and samples, despite it not always being required. There are three new defines {$DEFINE MSCRYPT_Clients}, {$DEFINE MSCRYPT_Servers} and {$DEFINE MSCRYPT_Tools) that determine which components can use the store, at least one must be set or applications that need the store will fail. Although these new defines all default to enabled in the OverbyteIcsDefs.inc supplied with V9.3 and later, unless this file is installed, Windows Certificate Store will be unavailable. These defines are disabled for non-Windows platforms and for C++ Builder which has bugs.
  3. Added new application independent monitoring, comprising a client component and server sample. The ICS Application Monitor TIcsAppMonCli client component is designed to report to an ICS Application Monitor server, which will ensure the main application remains running. The ICS Application Monitor server IcsAppMon.exe is designed to monitor ICS applications using the TIcsAppMonCli client component, and ensure they remain running, restarting the application if it stops or becomes non-responsive, or on demand. Primarily to keep ICS server Windows services running non-stop, but may also be used for network wide monitoring of ICS applications. Client and server both use the TIcsIpStrmLog component with a simple TCP protocol. More information at https://wiki.overbyte.eu/wiki/index.php?title=FAQ_ICS_Application_Monitoring
  4. The HTTP client components TSslHttpCli and TSslHttpRest have new RespMimeType and RespCharset response properties parsed from the Content-Type header to avoid applications needing to parse this headers. Fixed a problem in V9.2 where a missing / was added to the start of the request path, but was not needed for absolute paths used for proxies.
  5. The TIcsIpStrmLog streaming log component has improvements for TCP Server mode when multiple remote clients connect. Previously the same data was sent to all remote clients (the original concept being remote logging), but now applications can send data to specific remote clients, and more easily check which remote client is receiving data. This change means TIcsIpStrmLog can be used as the core of many TCP servers with different protocols, such as the new IcsAppMon sample, see above.
  6. The TSslHttpRest and component has a new way for applications to check SSL certificate chains themselves, ignoring OpenSSL bundle checks, usually for self signed private certificates, maybe checking certificate serials, names or public key. If LogSslVerMethod = logSslVerOwnEvent, a new event OnSslCertVerifyEvent is called so the application can check the chain and change the verify result appropriately.
  7. Improved the ability to customise SSL ciphers if the ICS defaults need to be changed. TSslContext and TIcsHosts have three properties, SslCipherList for TLSv12 ciphers, SslCipherList13 for TLSv13 ciphers, and SslCryptoGroups sets the cipher curve groups allowed (like P-256 or X25519). Beware old SslContexts may include group P-512 which must be corrected to T-521. SSL handshake responses now show the curve group used for OpenSSL 3.2 and later. The OverbyteIcsHttpsTst client sample may be used to test the new cipher options, and they will be read from IcsHosts INI files for servers.
  8. Added a new web server sample OverbyteIcsBasicWebServer1.dpr which is a simplified version of OverbyteIcsSslMultiWebServ ignoring configuration INI files, security features, session data, most demo pages and most logging, and settings for localhost set in code, search for IcsHosts to change IP addresses, etc. This sample should be easier to use as a basis for new web server applications. The existing samples OverbyteIcsSslMultiWebServ and OverbyteIcsDDWebService have a new index.html template page, and default to localhost 127.0.0.1 with an internal localhost SSL certificate, so should always response to https://localhost/ without any INI file changes.
  9. Fixed an HTTP web server problem in V9.2 to avoid repeated redirection for virtual default page /, was adding /// etc.
  10. Updated OpenSSL binary and resource files to releases 3.3.2, 3.2.3 and 3.0.15, only one of which will be linked according to defines.
  11. Restored the sample OverbyteIcsConHttp.dpr which is a console example, now supports SSL by replacing THttpCli with TSslHttpRest, no longer needs any events or a message loop for a single sync request, so a less code than without SSL. Now contacts https://wiki.overbyte.eu/wiki.
  12. A lot of changes have been made preparing ICS for Linux. Corrected loading OpenSSL on Posix, now loads the system supplied OpenSSL 3 DLLs on Ubuntu 22.04. The Linux package now builds correctly, but beware WSocket is not yet supported on Linux so no protocols will work. There is a new IcsPemTest FMX sample that works on Ubuntu 22.04 and which will create ICS signed SSL certificates. Note, MacOS support is disabled pending the new Posix implementation.

Changes in ICS V9.2 include:

  1. V9.2 is a minor release, fixing a few issues introduced in the last major release, and other bugs located since. There are no breaking or installation changes from V9.1, but if updating from earlier releases please read https://wiki.overbyte.eu/wiki/index.php/Updating_projects_to_V9.1
  2. TIcsMailQueue can now queue a prepared EML file created by another application, or perhaps received by the SMTP Server. Added optional SkipEmpty argument to StartMailQu method so queue is not started unless there are pending emails waiting to be sent. The sample has 'Send Prepared EML File' to queue an existing EML file rather then preparing email with properties.
  3. Improved email MIME decoding by supporting embedded boundaries, usually for multipart/alternative parts, within a multipart/mixed message, using code written 20 years ago but suppressed for some reason. Previously these parts were sometimes left encoded within a part. There is a new property LooseRFC to allow decoding if the boundaries in the body are missing the two required hyphens, usually because the boundary also begins with hyphens. TMimeDecodeEx should now always return the body if no MIME parts are found, and TPartInfo has PLevel which is Part Level, and PInfo which is displayable part information for logs. The MimeDDemo sample has various improvements to test these features.
  4. Fixed a nasty Win64 problem reading EC certificates from the Windows Store, which may have caused server crashes, also reproducible in the PemTool listing the Windows Store. This was due to Win64 bad initialisation of a buffer used for a Crypto API call that failed.
  5. The HTTP client now check the URL always has / at start of the path, ie add it for test.com?query. In the REST client, added a sanity check for RawParameters to encode any spaces, which can break the HTTP request. After a file download completed, check actual file size against response size. The multipart/form-data MimeBoundary no longer includes extra -- at start that are required preceding boundaries within parts, some web servers may have been unable to decode our MIME encoding.
  6. The HTTP server has a new method AnswerRedirect for various redirection responses to a new URL. When accessing the default document in a path without a trailing path delimited /, redirect using 301 to the correct path with delimiter instead of adding it locally and displaying the document which will then incorrectly link to pages in a higher level directory. Using the THttpOption hoAddMissPath redirects if the default document is missing perhaps a template or virtual document. Fixed a bug where authenticated POST/PUT requests always returned a 404 error. Added AnswerBodyTB client response with TBytes binary, similar to AnswerString, tested in the sample by supporting favicon.ico request. Check if the request HTTP version gets corrupted due to spaces in the URL, which are not allowed. The SslMultiWebServ sample has new web pages to test POST/PUT and template authentication.
  7. TSslX509Certs has a new function CertResetDomain to reset a certificate order state to None, if the order process stalls or gets confused due to errors. If AcmeV2StartChallgs fails because there are no pending challenges, reset to order to None so it starts again next time and does not loop.
  8. ICS not longer tries to load OpenSSL RAND_screen function that may be missing from recent DLLs.
  9. TIcsHttpMulti fixes a bug introduced in V8.66 that stopped the application setting authentication, rather than adding it to the URL, and a Win64 free stream bug.
  10. TIcsIpStrmLog correctly counts failed client connection attempts if ping is not used first to check the remote IP address. The sample has a new client Retry Attempts box to test this.
  11. Updated the Snippets sample to use authentication to access some the hardcoded URLs, which started failing after authentication was added to test web server bugs (see above).
  12. Added OverbyteIcsHttpThrd sample to show how to use TSslHttpRest component in a multi-threaded program.
  13. Improved Posix support for Linux and Android, not tested or supported yet. Beware SSL does not correctly load for Posix at the moment.
  14. Added support for a new feature release of OpenSSL 3.3 with {$DEFINE OpenSSL_33} in the Defs.inc file, ICS includes new versions of the active versions, 3.3.1, 3.2.2 and 3.0.14, but no longer includes 3.1 since there are two newer feature versions.
  15. Updated the 'ICS Intermediate Short' SSL certificates, used by ICS to generate temporary server certificates to allow SSL servers to run until a Let's Encrypt or commercial certificate is installed. It now expires after 200 days, 21st December 2024, after which self signed certificates will be used instead, unless a newer 'short' is installed.
  16. Only Delphi 10.41 and 10.42 (10.4 with updates 1 or 2) will install correctly with the new install packages, the original RTM version does not support the package LIB suffix: $(Auto) so you must change it manually for each package to 21.0.

Overbyte Website

There are four options to obtain the source code.

Download from Overbyte web site

ICS-V9 is the long term development version and needed for RAD Studio XE4 and later, it supports Delphi 7 and later.

Latest Stable Version ICS V9.4 - recommended

This is the latest recommended version, which has been tested and used for various published ICS application. It is updated for new releases of RAD Studio and major changes. V9.2 is the version displayed when RAD Studio starts and by the main unit OverbyteIcsWSocket. Note these versions include the latest version of the OpenSSL DLLs at the time of release.

Download Platforms
ICS-V9.4 Delphi 7 to XE8, 10, 10.1, 10.2, 10.3, 10.4, 11 and 12, C++ Builder 10.4, 11 and 12. Includes OpenSSL 3.0.16, 3.2.4, 3.3.3 and 3.4.1.
ICS-V9.4 Delphi 10.4, 11 and 12 only. Includes OpenSSL 3.0.16, 3.2.4, 3.3.3 and 3.4.1.
ICS-V9.3 Delphi 7 to XE8, 10, 10.1, 10.2, 10.3, 10.4, 11 and 12, C++ Builder 10.4, 11 and 12. Includes OpenSSL 3.3.2, 3.2.3 and 3.0.15.
ICS-V9.3 Delphi 10.4, 11 and 12 only. Includes OpenSSL 3.3.2, 3.2.3 and 3.0.15.
ICS-V9.2 Delphi 7 to XE8, 10, 10.1, 10.2, 10.3, 10.4, 11 and 12, C++ Builder 10.4, 11 and 12. Includes OpenSSL 3.0.14. 3.2.2 and 3.3.1.
ICS-V9.2 Delphi 10.4, 11 and 12 only. Includes OpenSSL 3.0.14. 3.2.2 and 3.3.1.
ICS-V9.1 Delphi 7 to XE8, 10, 10.1, 10.2, 10.3, 10.4, 11 and 12, C++ Builder 10.4, 11 and 12. Includes OpenSSL 3.0.13. 3.1.5 and 3.2.1.
ICS-V9.1 Delphi 10.4, 11 and 12 only. Includes OpenSSL 3.0.13. 3.1.5 and 3.2.1.
ICS-V9.0 Delphi 7 to XE8, 10, 10.1, 10.2, 10.3, 10.4, 11 and 12, C++ Builder 2006 to XE3, 10.2, 10.3, 10.4, 11 and 12. Includes OpenSSL 3.1.2.
ICS-V9.0 Delphi 12 only. Includes OpenSSL 3.1.2.
ICS-V9.0 Delphi 11 only. Includes OpenSSL 3.1.2.
ICS-V9.0 Delphi 10.4 only. Includes OpenSSL 3.1.2.
ICS-V8.70 Delphi 7 to XE8, 10, 10.1, 10.2, 10.3, 10.4 and 11, C++ Builder 2006 to XE3, 10.2, 10.3, 10.4 and 11. Includes OpenSSL 3.0.7.
ICS-V8.70 Delphi 11 only. Includes OpenSSL 3.0.7.
ICS-V8.70 Delphi 10.4 only. Includes OpenSSL 3.0.7.

From XE8 onwards, Delphi includes a new GetIt tool that offers a catalog of third party components, and allows them to be automatically downloaded and installed. The same stable ICS versions listed above should be available from GetIt.

Zipped Daily Snapshots

This is the easiest way to get the latest version. These packages are built from the version control repositories automatically when they change and are refreshed once a day. To use the latest OpenSSL version, download this snapshot. Note the snapshot includes the latest version of the OpenSSL DLLs.

Download Changes log
ICS-V9 Snapshot View

Archives

Download Changes log
ICS-V9.1 Archived Samples
ICS-V8 Archive View
ICS-V7 Archive View
ICS-V6 Archive View
ICS-V5 Archive View

Version Control System

Using the version control repository is the best choice if you want to get live access to current development files. Overbyte uses a Subversion server and you need to use a Subversion client such as TortoiseSVN or your favorite browser. The URLs are as follows:

ICS Version SVN URL HTTP URL
ICS-V9 svn://svn.overbyte.be/icsv9 https://svn.overbyte.be/svn/icsv9
ICS-V8 svn://svn.overbyte.be/ics/trunk https://svn.overbyte.be/svn/ics/trunk
ICS-V7 svn://svn.overbyte.be/ics/tags/icsv7 https://svn.overbyte.be/svn/ics/tags/icsv7
ICS-V6 svn://svn.overbyte.be/ics/tags/v6_obsolete https://svn.overbyte.be/svn/ics/tags/v6_obsolete
ICS-V5 svn://svn.overbyte.be/icsv5 https://svn.overbyte.be/svn/icsv5

Use username = ics and password = ics for read access. Write access is only available to TeamICS.

Download OpenSSL Binaries

The OpenSSL binaries are required for all ICS SSL-enabled components.

The 64-bit DLLs are only for use with Delphi applications compiled for the 64-bit platform, the 32-bit DLLs work on both 32-bit and 64-bit Windows with 32-bit applications.

Please note older versions of the ICS source code had an internal check to only allow loading of the latest OpenSSL it was tested with, so you could not use new DLLs with an old application without recompiling with the latest version of ICS first.

OpenSSL 1.0.2 and later were only supported by ICS v8, v7 is no longer updated for new OpenSSL versions. This was a long term support version for which free support ceased at the end of 2019 unless you have an OpenSSL Premium Level Support contract for $50,000/year. ICS V8.65 was the last version to support 1.0.2.

OpenSSL 1.1.0 is obsolete and no longer supported. ICS V8.65 is the last version to support 1.1.0.

OpenSSL 1.1.1 is obsolete. Support ceased in September 2023 unless you have an OpenSSL Premium Level Support contract for $50,000/year. Only supports Windows Vista/Server 2008, and later, not Windows XP.

OpenSSL 3.0 is a major new release, primarily a lot of internal changes to ease long term support. ICS 8.67 is required to support 3.0. There is an optional FIPS module with 3.0 but not available here since our DLLs are not built to standards required for certification. The old engines for special extensions are replaced by new more versatile providers of which the FIPS module is one, a provider legacy.dll contained in the distribution has obsolete ciphers and hash digests that most applications no longer need and which needs to loaded by the application. This version will be supported until September 2026.

OpenSSL 3.1 is obsolete. Support ceased in March 2025 and is no longer updated for ICS.

OpenSSL 3.2 is a minor new release with QUIC client support for HTTP/3 and many other improvements. ICS 8.67 is required to support 3.2. This version will be supported until November 2025 but ICS may drop it earlier.

OpenSSL 3.3 is a minor new release, minor QUIC and other features. ICS 8.67 is required to support 3.3. This version will be supported until April 2026.

OpenSSL 3.4 is a minor new release, minor newr features. ICS 8.67 is required to support 3.4. There is a bug fix in ICS 9.4. This version will be supported until October 2026.

OpenSSL 3.5 is a major new long term support release, adding Post Quantum Cryptography (PQC) algorithms (ML-KEM, ML-DSA and SLH-DSA) and server side QUIC (RFC 9000). ICS has no plans for QUIC support). ICS 8.67 is required to support 3.2. This version will be supported until April 2030.

Please note that ICS does not use any of the new features in OpenSSL 3.2 or later at present, so continuing to use the latest patch version of 3.0 with security fixes is generally fine.

The OpenSSL DLLs and EXE files included in the zips above are digitally code signed 'Magenta Systems Ltd', one of the organisations that maintains ICS. The Magenta Systems Code Signing Trust and Certificate Check component may be used to check the correctly signed DLLs are being used by ICS, with this functionality included in ICS V8.38 and later. Beware that Windows needs recent root certificates to check newly signed code, and may give an error if the root store has not been kept current by Windows Update, particularly on older versions of Windows such as XP, Vista and 7. The signed check may be disabled in the OverbyteIcsDefs.inc file by suppressing defines OpenSSL_Check_Signed and OpenSSL_Check_SignCert.

Date Download Description Comments
2025-04-10 OpenSSL Binaries Win-64 3.5.0 requires ICS V8.67 or later Built with Visual Studio Build Tools 2017 Supports TLSv1.3. For 64-bit applications only (XE2+). Digitally code signed. Only supports Windows Vista/Server 2008, and later, not Windows XP. Includes a compiled RES resource file with the same files.
2025-04-10 OpenSSL Binaries Win-32 3.5.0 requires ICS V8.67 or later Built with Visual Studio Build Tools 2017

Supports TLSv1.3. Use with 32-bit applications on Windows 64-bit. Digitally code signed. Only supports Windows Vista/Server 2008, and later, not Windows XP. Includes a compiled RES resource file with the same files.

2025-02-12 OpenSSL Binaries Win-64 3.4.1 requires ICS V8.67 or later Built with Visual Studio Build Tools 2017 Supports TLSv1.3. For 64-bit applications only (XE2+). Digitally code signed. Only supports Windows Vista/Server 2008, and later, not Windows XP. Includes a compiled RES resource file with the same files.
2025-02-12 OpenSSL Binaries Win-32 3.4.1 requires ICS V8.67 or later Built with Visual Studio Build Tools 2017

Supports TLSv1.3. Use with 32-bit applications on Windows 64-bit. Digitally code signed. Only supports Windows Vista/Server 2008, and later, not Windows XP. Includes a compiled RES resource file with the same files.

2025-02-12 OpenSSL Binaries Win-64 3.3.3 requires ICS V8.67 or later Built with Visual Studio Build Tools 2017 Supports TLSv1.3. For 64-bit applications only (XE2+). Digitally code signed. Only supports Windows Vista/Server 2008, and later, not Windows XP. Includes a compiled RES resource file with the same files.
2025-02-12 OpenSSL Binaries Win-32 3.3.3 requires ICS V8.67 or later Built with Visual Studio Build Tools 2017

Supports TLSv1.3. Use with 32-bit applications on Windows 64-bit. Digitally code signed. Only supports Windows Vista/Server 2008, and later, not Windows XP. Includes a compiled RES resource file with the same files.

2025-02-12 OpenSSL Binaries Win-64 3.2.4 requires ICS V8.67 or later Built with Visual Studio Build Tools 2017 Supports TLSv1.3. For 64-bit applications only (XE2+). Digitally code signed. Only supports Windows Vista/Server 2008, and later, not Windows XP. Includes a compiled RES resource file with the same files.
2025-02-12 OpenSSL Binaries Win-32 3.2.4 requires ICS V8.67 or later Built with Visual Studio Build Tools 2017

Supports TLSv1.3. Use with 32-bit applications on Windows 64-bit. Digitally code signed. Only supports Windows Vista/Server 2008, and later, not Windows XP. Includes a compiled RES resource file with the same files.

2025-02-12 OpenSSL Binaries Win-64 3.0.16 requires ICS V8.67 or later Built with Visual Studio Build Tools 2017 Supports TLSv1.3. For 64-bit applications only (XE2+). Digitally code signed. Only supports Windows Vista/Server 2008, and later, not Windows XP. Includes a compiled RES resource file with the same files.
2025-02-12 OpenSSL Binaries Win-32 3.0.16 requires ICS V8.67 or later Built with Visual Studio Build Tools 2017 Supports TLSv1.3. Use with 32-bit applications on Windows 64-bit. Digitally code signed. Only supports Windows Vista/Server 2008, and later, not Windows XP. Includes a compiled RES resource file with the same files.
2024-10-25 OpenSSL Binaries Win-64 3.4.0 requires ICS V8.67 or later Built with Visual Studio Build Tools 2017 Supports TLSv1.3. For 64-bit applications only (XE2+). Digitally code signed. Only supports Windows Vista/Server 2008, and later, not Windows XP. Includes a compiled RES resource file with the same files.
2024-10-25 OpenSSL Binaries Win-32 3.4.0 requires ICS V8.67 or later Built with Visual Studio Build Tools 2017

Supports TLSv1.3. Use with 32-bit applications on Windows 64-bit. Digitally code signed. Only supports Windows Vista/Server 2008, and later, not Windows XP. Includes a compiled RES resource file with the same files.

2024-09-05 OpenSSL Binaries Win-64 3.3.2 requires ICS V8.67 or later Built with Visual Studio Build Tools 2017 Supports TLSv1.3. For 64-bit applications only (XE2+). Digitally code signed. Only supports Windows Vista/Server 2008, and later, not Windows XP. Includes a compiled RES resource file with the same files.
2024-09-05 OpenSSL Binaries Win-32 3.3.2 requires ICS V8.67 or later Built with Visual Studio Build Tools 2017

Supports TLSv1.3. Use with 32-bit applications on Windows 64-bit. Digitally code signed. Only supports Windows Vista/Server 2008, and later, not Windows XP. Includes a compiled RES resource file with the same files.

2024-09-05 OpenSSL Binaries Win-64 3.2.3 requires ICS V8.67 or later Built with Visual Studio Build Tools 2017 Supports TLSv1.3. For 64-bit applications only (XE2+). Digitally code signed. Only supports Windows Vista/Server 2008, and later, not Windows XP. Includes a compiled RES resource file with the same files.
2024-09-05 OpenSSL Binaries Win-32 3.2.3 requires ICS V8.67 or later Built with Visual Studio Build Tools 2017

Supports TLSv1.3. Use with 32-bit applications on Windows 64-bit. Digitally code signed. Only supports Windows Vista/Server 2008, and later, not Windows XP. Includes a compiled RES resource file with the same files.

2024-09-05 OpenSSL Binaries Win-64 3.0.15 requires ICS V8.67 or later Built with Visual Studio Build Tools 2017 Supports TLSv1.3. For 64-bit applications only (XE2+). Digitally code signed. Only supports Windows Vista/Server 2008, and later, not Windows XP. Includes a compiled RES resource file with the same files.
2024-09-05 OpenSSL Binaries Win-32 3.0.15 requires ICS V8.67 or later Built with Visual Studio Build Tools 2017 Supports TLSv1.3. Use with 32-bit applications on Windows 64-bit. Digitally code signed. Only supports Windows Vista/Server 2008, and later, not Windows XP. Includes a compiled RES resource file with the same files.
2024-06-06 OpenSSL Binaries Win-64 3.3.1 requires ICS V8.67 or later Built with Visual Studio Build Tools 2017 Supports TLSv1.3. For 64-bit applications only (XE2+). Digitally code signed. Only supports Windows Vista/Server 2008, and later, not Windows XP. Includes a compiled RES resource file with the same files.
2024-06-06 OpenSSL Binaries Win-32 3.3.1 requires ICS V8.67 or later Built with Visual Studio Build Tools 2017

Supports TLSv1.3. Use with 32-bit applications on Windows 64-bit. Digitally code signed. Only supports Windows Vista/Server 2008, and later, not Windows XP. Includes a compiled RES resource file with the same files.

2024-06-06 OpenSSL Binaries Win-64 3.2.2 requires ICS V8.67 or later Built with Visual Studio Build Tools 2017 Supports TLSv1.3. For 64-bit applications only (XE2+). Digitally code signed. Only supports Windows Vista/Server 2008, and later, not Windows XP. Includes a compiled RES resource file with the same files.
2024-06-06 OpenSSL Binaries Win-32 3.2.2 requires ICS V8.67 or later Built with Visual Studio Build Tools 2017

Supports TLSv1.3. Use with 32-bit applications on Windows 64-bit. Digitally code signed. Only supports Windows Vista/Server 2008, and later, not Windows XP. Includes a compiled RES resource file with the same files.

2024-06-06 OpenSSL Binaries Win-64 3.0.14 requires ICS V8.67 or later Built with Visual Studio Build Tools 2017 Supports TLSv1.3. For 64-bit applications only (XE2+). Digitally code signed. Only supports Windows Vista/Server 2008, and later, not Windows XP. Includes a compiled RES resource file with the same files.
2024-06-06 OpenSSL Binaries Win-32 3.0.14 requires ICS V8.67 or later Built with Visual Studio Build Tools 2017 Supports TLSv1.3. Use with 32-bit applications on Windows 64-bit. Digitally code signed. Only supports Windows Vista/Server 2008, and later, not Windows XP. Includes a compiled RES resource file with the same files.
2024-02-05 OpenSSL Binaries Win-64 3.1.5 requires ICS V8.67 or later Built with Visual Studio Build Tools 2017 Supports TLSv1.3. For 64-bit applications only (XE2+). Digitally code signed. Only supports Windows Vista/Server 2008, and later, not Windows XP. Includes a compiled RES resource file with the same files.
2024-02-05 OpenSSL Binaries Win-32 3.1.5 requires ICS V8.67 or later Built with Visual Studio Build Tools 2017

Supports TLSv1.3. Use with 32-bit applications on Windows 64-bit. Digitally code signed. Only supports Windows Vista/Server 2008, and later, not Windows XP. Includes a compiled RES resource file with the same files.

2023-09-21 OpenSSL Binaries Win-64 1.1.1w requires ICS V8.57 or later Built with Visual Studio Build Tools 2017 Supports TLSv1.3. For 64-bit applications only (XE2+). Digitally code signed. Only supports Windows Vista/Server 2008, and later, not Windows XP.
2023-09-21 OpenSSL Binaries Win-32 1.1.1w requires ICS V8.57 or later Built with Visual Studio Build Tools 2017 Supports TLSv1.3. Use with 32-bit applications on Windows 64-bit. Digitally code signed. Only supports Windows Vista/Server 2008, and later, not Windows XP.
2020-03-18 OpenSSL Binaries Win-64 1.0.2u requires ICS V8.24 to ICS V8.65 Built with Visual Studio Build Tools 2017 For 64-bit applications only (XE2+). Digitally code signed. Only supports Windows Vista/Server 2008, and later, not Windows XP.
2020-03-18 OpenSSL Binaries Win-32 1.0.2u requires ICS V8.24 to ICS V8.65 Built with Visual Studio Build Tools 2017 Use with 32-bit applications on Windows 64-bit. Digitally code signed. Only supports Windows Vista/Server 2008, and later, not Windows XP.

Download OpenSSL Binaries (alternative)

OpenSSL website also links to Win32OpenSSL website providing another build of Win32 DLL binaries. Note note that unlike the builds above builds on that site may have dependencies on Visual C++ 2008 Redistributables (to keep dll files smaller) so make sure you include all the required (and correct) redistributable files in your software installation. You probably don't have to care about that if you use binaries above at the cost of slightly larger DLLs. Also note that site does not keep archives of older versions so you may want to watch their page if you prefer their binaries.

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