Delphi: 7 Indy 9 Could Not Load Ssl Library ((hot))

var IdSSL: TIdSSLIOHandlerSocket; begin IdSSL := TIdSSLIOHandlerSocket.Create(IdHTTP1); IdHTTP1.IOHandler := IdSSL; // Indy 9 typically uses SSLv2, SSLv3, or TLSv1 IdSSL.SSLOptions.Method := sslvTLSv1; end; Use code with caution. Copied to clipboard

Ensure your application can find the libraries:

Delphi 7 compiles native 32-bit applications. You must use 32-bit OpenSSL DLLs , even if your application is running on a 64-bit Windows operating system. Delphi 7 Indy 9 Could Not Load Ssl Library

Because Delphi 7 and Indy 9 are legacy development tools, they rely on specific, older versions of OpenSSL. Modern operating systems do not ship with these compatible files, requiring developers to manually deploy and configure the correct binaries. Direct Solution Checklist

Protip: Place this call any Indy SSL connection, ideally at project startup (DPR). Because Delphi 7 and Indy 9 are legacy

Ensure the DLLs were not placed while the application was running.

from the downloaded package.

That means Windows could not load that DLL into memory at all. Probably because it couldn't find the dependent ssleay32. dll file, Google Groups TIDHTTP : Could not load SSL library on non https URLs 6 Dec 2018 —

The most robust long-term solution is to upgrade from Indy 9 to a newer version of Indy that supports modern SSL/TLS standards. This is a significant undertaking, however, and requires careful refactoring of existing code. Ensure the DLLs were not placed while the

Understanding why this error happens is key to preventing it from recurring across different deployment environments. 1. Missing OpenSSL DLLs

A very common issue on modern Windows 10 and 11 systems is that TLS 1.0 and 1.1 are often disabled by default for security reasons. Since Indy 9 is limited to TLS 1.0, it will fail to negotiate a secure connection with many servers.