Indy 9 only supports up to . In the modern security landscape, almost all web servers, APIs, and mail providers have deprecated TLS 1.0 and TLS 1.1 due to vulnerabilities. They now strictly require TLS 1.2 or TLS 1.3 . OpenSSL 0.9.6/0.9.7 cannot negotiate a TLS 1.2 connection. How to Achieve Modern TLS 1.2 Support in Delphi 7
If you must remain on Indy 9 but only have OpenSSL 1.1/3.x
This is the most critical step and the most common source of the error. Indy 9 is an older library and requires a very specific version of OpenSSL. .
Here is the critical detail that most developers miss: It cannot use OpenSSL 1.1.x or 3.x. Modern operating systems (Windows 10, Windows 11, Windows Server 2016/2019/2022) do not ship with these outdated, vulnerable versions. Even if you manually place newer OpenSSL DLLs in your app folder, Indy 9 will refuse to load them because the internal API functions (like SSL_library_init or OpenSSL_add_all_algorithms ) have changed or been removed.
The Indy 9 library does not contain native SSL encryption algorithms. Instead, it acts as a wrapper that calls external, open-source libraries. The loading process fails due to three primary reasons: Delphi 7 Indy 9 Could Not Load Ssl Library
Follow these steps in order to resolve the error and successfully initialize SSL in your Delphi 7 environment. 1. Download the Correct OpenSSL DLL Versions
Fixing the "Could Not Load SSL Library" Error in Delphi 7 with Indy 9
usually occurs because the application cannot find or properly load the required OpenSSL DLLs: libeay32.dll ssleay32.dll Stack Overflow 1. Use the Correct DLL Versions
The "Could not load SSL Library" error in almost always stems from a mismatch or absence of specific OpenSSL DLLs required at runtime Indy 9 only supports up to
What (HTTPS, SMTP, etc.) are you attempting to connect to?
Drop a TIdSSLIOHandlerSocket (or TIdSSLIOHandlerSocketOpenSSL ) component onto your form.
Common fixes
If you have followed all steps and still get the error, you need to debug the DLL loading process. OpenSSL 0
To tell Indy where to find the OpenSSL libraries:
Are you open to , or must you keep the project strictly on Indy 9 ?
The progress bar spun. The little network light on the server blinked. And then, a green message appeared: "Connection Successful. TLS Handshake Completed."