__full__ - Delphi 7 Indy 9 Could Not Load Ssl Library

Indy 9 requires two specific files to be present in your application's search path: Stack Overflow libeay32.dll ssleay32.dll Crucial Compatibility Note: Indy 9 typically only supports OpenSSL version 0.9.6

Indy provides a powerful debugging tool: the WhichFailedToLoad function. You can call this function when the error occurs to get a detailed reason for the failure.

In your Delphi form or data module:

Indy 9 is hardcoded to look for specific, older exported functions inside the OpenSSL DLLs. Using modern OpenSSL versions (like 1.1.x or 3.x) will fail because the internal architecture and function names changed entirely. Delphi 7 Indy 9 Could Not Load Ssl Library

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]

Windows utilizes a specific search order to resolve DLL dependencies at runtime. To ensure your application binds to the correct 0.9.6 binaries without interfering with other software on the system, deploy ssleay32.dll and libeay32.dll directly into the .

Indy 10 is fully compatible with Delphi 7 and actively supports newer OpenSSL versions (the 1.0.2 branch, specifically versions like 1.0.2u ). OpenSSL 1.0.2 supports TLS 1.2 connections. You will need to remove the native Indy 9 packages from your Delphi IDE components list and compile/install the Indy 10 package source. Indy 9 requires two specific files to be

Select the TIdSSLIOHandlerSocket component and ensure its SSLOptions.Method property matches the requirements of the server (typically sslvTLSv1 for legacy compatibility, though many modern servers now reject this in favor of TLS 1.2/1.3). Verifying and Debugging the Connection

Instead of relying on third-party DLL distributions like OpenSSL, you can bypass Indy entirely for HTTP/HTTPS requests by leveraging Windows' built-in networking APIs. Wrapping WinINet or WinHTTP allows your application to delegate encryption directly to the Windows Operating System. This strategy automatically grants your legacy Delphi 7 application access to TLS 1.2 and TLS 1.3, provided the underlying Windows OS is updated. Summary Troubleshooting Checklist

The latest stable versions of Indy 10 officially support OpenSSL 1.0.2u and have work-in-progress support for OpenSSL 1.1.x. Newer versions of Indy 10 can also work with OpenSSL 1.0.x and 1.1.x libraries. Using modern OpenSSL versions (like 1

Follow these steps in order to resolve the issue and restore SSL functionality to your Delphi 7 application. 1. Download the Correct OpenSSL Version

Drop a TIdSSLIOHandlerSocket (or TIdSSLIOHandlerSocketOpenSSL ) component onto your form.

If you successfully load the DLLs but encounter connection closures, handshaking failures, or "Connection Closed Gracefully" messages, you are hitting a protocol limitation.