Delphi 7 Indy 9 Could Not Load Ssl Library =link= Official

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. Unlike modern versions, Indy 9 is highly sensitive to the exact version of the binaries used. Stack Overflow 1. Identify the Correct DLLs

Drop a TIdHTTP and a TIdSSLIOHandlerSocket component onto your form, or instantiate them dynamically using the following code structure:

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To leverage SSL, your Indy component (such as TIdHTTP ) must be explicitly linked to an SSL IOHandler component. Drop a TIdHTTP component onto your form. Drop a TIdSSLIOHandlerSocket component onto your form. Delphi 7 Indy 9 Could Not Load Ssl Library

Instead of relying on OpenSSL DLLs, you can leverage the operating system's native cryptographic stack (SChannel) via Windows WinHTTP components. This allows your Delphi 7 app to use TLS 1.2 and TLS 1.3 automatically based on the host Windows OS capabilities. Use MSXML2_TLB or import winhttp.dll functions directly.

Indy 9 typically requires libeay32.dll and ssleay32.dll . Because of export restrictions, these are not bundled with Delphi or Indy.

Use a third-party tool like stunnel to act as a local proxy, handling the modern SSL on behalf of the old Delphi app. 4. Troubleshooting Checklist

Upgrade to Indy 10.6.2 (the last version to support Delphi 7). This public link is valid for 7 days

OpenSSL heavily modifies its exported function names and internal structures between major versions. Indy 9 was written explicitly to bind with the architecture.

To resolve this, download the and place them in your application's root directory. If you'd like, I can help you: Locate a direct download link for the archived 0.9.6 DLLs. Walk through the upgrade process to Indy 10 for Delphi 7.

The "Could Not Load SSL Library" error is one of the most common and frustrating issues encountered by developers using Delphi 7 and Indy 9. It typically occurs when your application attempts to make an HTTPS request or connect to a secure server via TIdHTTP, TIdSMTP, or other SSL-enabled Indy components.

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Root causes (most common)

This approach is particularly useful in shared hosting or server environments, or when you wish to keep your application's executable folder clean from dependencies.

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.