Delphi 7 Indy 9 Could Not Load Ssl Library

If you see “1.0.2u”, you are on the right track.

if you are moving away from Indy 9.

This report addresses the common runtime error encountered by developers using Delphi 7 and Indy 9 components (specifically TIdHTTP or TIdSMTP ) to establish secure connections. This issue typically arises when the application cannot locate or incompatible versions of the OpenSSL libraries ( libeay32.dll and ssleay32.dll ) required for SSL/TLS operations. The primary solution involves placing the correct DLL versions in the appropriate system directories.

Install the Microsoft Visual C++ 2008 SP1 Redistributable (x86) . Even if the error doesn't show explicitly, Indy's LoadLibrary will quietly fail without this installed.

Delphi 7 is a 32-bit IDE, and Indy 9 creates 32-bit applications. You must use 32-bit OpenSSL DLLs, even on a 64-bit version of Windows. 2. Step-by-Step Solution Follow these steps to resolve the loading issue. Step 1: Obtain the Correct OpenSSL DLLs You need the older OpenSSL 0.9.7x or 0.9.8x binaries. Delphi 7 Indy 9 Could Not Load Ssl Library

If you are forced to use modern DLLs for security compliance (not recommended for Indy 9 without heavy modification), you would have to change these constants and recompile the Indy 9 packages, though this usually leads to runtime crashes due to API changes.

Search online archives for openssl-0.9.6m-win32.zip or ssleay32.dll / libeay32.dll version 0.9.6 . Ensure you extract both required files: ssleay32.dll libeay32.dll 2. Place the DLLs in the Correct Directory

Add the OpenSSL library paths to your Delphi 7 project:

Modify your code to get the actual Win32 error during load: If you see “1

uses IdHTTP, IdSSLOpenSSL;

The report will tell you if Indy cannot find the DLLs, cannot load them into memory, or if they are missing required functions.

If your target server requires TLS 1.2, you cannot use native Indy 9 components. You have three paths forward:

If you have followed all steps and still get the error, you need to debug the DLL loading process. This issue typically arises when the application cannot

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After installing the OpenSSL library, you need to configure the library path in your Delphi 7 project.

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.

A: Ensure you are using the custom-built Indy 0.9.8 DLLs from the official Indy repository, not standard OpenSSL DLLs from other sources. Standard DLLs lack the custom functions required by Indy 9. The WhichFailedToLoad() function will confirm if this is the issue.