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Delphi 7 Indy 9 Could Not Load Ssl Library -

The error "Could not load SSL Library" 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

Indy 9 is an older version and is not compatible with modern OpenSSL 1.1.x or even standard 1.0.x libraries. Stack Overflow Target Version : You generally need OpenSSL 0.9.6 DLLs that were specifically customized for Indy 9. Where to Download : You can find these archived binaries at the Indy Fulgan Archive . Look for files like indy_OpenSSL096m.zip Architecture : Ensure you use DLLs, as Delphi 7 only produces 32-bit executables. Stack Overflow 2. Proper Placement of DLLs Application Directory : Place both libeay32.dll ssleay32.dll in the same folder as your compiled

file. This is the first place Windows looks for dependencies. Avoid System Folders : Do not place them in C:\Windows\System32 , as this can conflict with other applications and the OS. Stack Overflow 3. Debugging the Load Failure

If the DLLs are present but the error persists, use Indy's built-in diagnostic tools: WhichFailedToLoad IdSSLOpenSSLHeaders clause and call WhichFailedToLoad()

in an exception handler. It returns a string explaining why the load failed (e.g., missing specific exports like functions). Explicit Path : If you must store DLLs elsewhere, use IdOpenSSLSetLibPath('C:\Path\To\DLLs') IdSSLOpenSSLHeaders unit before attempting a connection. Google Groups 4. Component Configuration Delphi 7 Indy 9 Could Not Load Ssl Library - Google Groups 2 May 2024 —

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 —

Step 4: Handling "Not a Valid Win32 Application"

If you receive a different error immediately after fixing the "Could Not Load" error, such as "Not a valid Win32 application," it means you have a bitness mismatch. Delphi 7 Indy 9 Could Not Load Ssl Library

  • Delphi 7 produces 32-bit applications only.
  • You must use 32-bit OpenSSL DLLs.
  • Do not use the 64-bit OpenSSL binaries, even if your OS is 64-bit.

Use Dependency Walker (or Dependencies)

Download Dependencies.exe (a modern open-source tool) or the old depends.exe. Drag your ssleay32.dll into it. Look for missing dependencies:

  • MSVCR90.dll or MSVCR100.dll missing? → Install VC++ Redist.
  • KERNEL32.dll forwarder issues? → You are using a 64-bit DLL on a 32-bit app.

Troubleshooting

If you still encounter issues after following these steps, you can try:

  • Checking the OpenSSL library version and compatibility with Indy 9.
  • Verifying that the OpenSSL library files are correctly installed and configured on your system.
  • Searching for similar issues and solutions on online forums and communities (e.g., Stack Overflow, Delphi forums).

Finding yourself stuck with the "Could Not Load SSL Library" error in Delphi 7 with Indy 9 is a classic headache. It almost always boils down to a mismatch between what Indy expects and what is actually on your system.

Here’s the breakdown of why this happens and how to fix it. The Root Cause Indy 9 doesn't have SSL built-in; it acts as a wrapper for

. When your code tries to connect via HTTPS or SSL, Indy looks for two specific external library files: ssleay32.dll libeay32.dll

. If it can't find them, or if the versions are too new, it gives up. Step 1: Get the Right DLLs Indy 9 is quite old, and it is not compatible with modern OpenSSL 1.1.x or 3.x branches. You must use the Find the OpenSSL binaries for version (specifically versions like 0.9.8zb or similar). Ensure you are using

DLLs. Even if your OS is 64-bit, Delphi 7 compiles 32-bit applications, so it requires 32-bit libraries. Step 2: Placement is Everything For your IDE and your application to see these files, place ssleay32.dll libeay32.dll in one of two places: The Application Folder: Put them in the same directory as your project's . This is the best practice for deployment. The System Path: For development purposes, you can drop them into C:\Windows\SysWOW64 (on 64-bit Windows) or C:\Windows\System32 (on 32-bit Windows). Step 3: Check your Code The error "Could not load SSL Library" in

Simply having the DLLs isn't enough; you have to tell Indy to use them. Ensure you have an IdSSLIOHandlerSocket component (or similar) assigned to your IdTCPClient component’s

IdHTTP1.IOHandler := IdSSLIOHandlerSocket1; IdHTTP1.Get('https://example.com'); Use code with caution. Copied to clipboard Troubleshooting Tips Dependencies:

Sometimes these DLLs require the "Microsoft Visual C++ 2008 Redistributable." If the DLLs are present but still won't load, try installing that. The "Which" Test: Use a tool like Dependency Walker

on your compiled EXE to see exactly where it is looking for the DLLs and if it's finding the wrong versions elsewhere in your system path. Version Check: In your code, you can call IndySSLVersion

to see if Indy is actually registering the library after you've placed the files. Modern Note:

If you are trying to connect to modern websites, many now require TLS 1.2 or 1.3

. Indy 9 lacks native support for these newer protocols. If your DLLs load but the connection fails with a "Connnection Closed Gracefully" or handshake error, it’s time to consider upgrading to or using a third-party library like Do you have the 0.9.8 DLLs Delphi 7 produces 32-bit applications only

on hand, or would you like a lead on where to safely find those older versions?

The error "Could not load SSL Library" in Delphi 7 with Indy 9 is typically caused by missing or incompatible OpenSSL binaries. Because Indy 9 is extremely old, it relies on specific, often customized, legacy builds of OpenSSL that differ from modern standards. 1. Primary Cause: Incompatible DLL Versions

Indy 9 does not support modern OpenSSL versions (like 1.0.x or 1.1.x).

Required Files: You must have ssleay32.dll and libeay32.dll in your application directory or system path.

Version Mismatch: Indy 9 generally requires OpenSSL 0.9.6 DLLs. Modern versions of these DLLs lack specific functions (e.g., exports ending in _indy) that Indy 9 expects.

Bit Depth: Since Delphi 7 is a 32-bit IDE, you must use the 32-bit versions of these DLLs, even if you are on a 64-bit Windows OS. 2. Immediate Solutions Indy 9 + Delphi 2007 latest SSL Libraries available?