, as this can cause conflicts with other 64-bit applications or system tools. Stack Overflow 4. Code Implementation
Indy 9 is deprecated, and OpenSSL 0.9.x/1.0.x has reached End of Life (EOL). Using these libraries exposes your application to known security vulnerabilities.
By default, Windows looks for DLLs in the application directory or the system path. If they are not in either, the library won't load. Step-by-Step Solutions 1. Download the Correct DLLs Could not load OpenSSL library. - Delphi-PRAXiS [en]
Do not download standard OpenSSL files from modern distributions. You need the archived, customized files specifically compiled for Indy 9. Delphi 7 Indy 9 Could Not Load Ssl Library - Google Groups
The last good version is often labeled as "OpenSSL 1.0.2 Light for Windows (Visual Studio 6 build)". Delphi 7 Indy 9 Could Not Load Ssl Library
: Delphi 7 produces 32-bit applications, so you must use 32-bit (i386) DLLs. Critical Solution: Using the Correct DLLs
Ensure you are using OpenSSL 0.9.6 binaries, not 1.0.x or 1.1.x. Missing Dependencies Some DLL builds require the Visual C++ Redistributable
uses IdSSLOpenSSLHeaders;
procedure TForm1.Button1Click(Sender: TObject); begin // Load OpenSSL library IdOpenSSL.LoadOpenSSL; , as this can cause conflicts with other
The "Could Not Load SSL Library" error usually indicates that the Indy library is unable to find or load the required SSL/TLS library (e.g., OpenSSL). Indy 9 relies on external libraries for SSL/TLS support, which are not included with Delphi 7 by default.
The "Could not load SSL library" error in Delphi 7 Indy 9 is a classic compatibility issue, not a sign that your code is broken. By understanding that Indy 9 requires specific, custom-built OpenSSL 0.9.6 DLLs, you can overcome the immediate obstacle. Using the diagnostic tools provided by Indy, like WhichFailedToLoad , can help you quickly identify the root cause. However, given the age of the technology and the modern security landscape, a long-term solution should involve upgrading to Indy 10 or considering a more modern development environment. Good luck!
: Locate the archived 0.9.6m or similar legacy builds. Historically, these were hosted at Indy Fulgan Archive .
If you need further assistance, the Indy project's documentation and community forums are excellent resources. For issues related to TLS protocol versions after the DLLs load successfully, you may need to adjust the SSLOptions.Method property of the SSL IOHandler to enable TLS 1.2. Using these libraries exposes your application to known
Simply having the DLLs isn't enough; you have to tell Indy to use them. Ensure you have an IdSSLIOHandlerSocket component (or similar) assigned to your IdTCPClient component’s
The primary challenge with the Delphi 7 and Indy 9 combination is a specific version compatibility issue. , which include unique functions that the standard OpenSSL distribution does not provide. An earlier version (0.9.6) had also been used. Using standard OpenSSL 1.0.x or later libraries with Indy 9 will consistently produce the error, as those versions lack the required custom entry points.
You cannot use sslvTLSv1 (which is actually TLS 1.0). You need to force the context manually.