libeay32.dll not found

[fearcry]

I try to deploy a software for a ftp-server access. I am using the c++ builder 10.2.3 with indy 10.

Are you using the version of Indy that shipped pre-installed in the IDE, or are you using a different version you installed manually?

If I try to connect to the server I get the error message "ssl negotiation failed".
The function "WhichFailedToLoad()" gives back "libeay32.dll not found".

That is not what WhichFailedToLoad() would say.  It would be more like "Failed to load libeay32.dll" instead.  A failure to load, and a file not found, are potentially two very different error conditions.  A load could fail for any number of reasons.

A copy of the dll to the application folder nit helps.

Do you also have ssleay32.dll in the same folder as libeay32.dll?  Are both DLLs using the same bitness (32bit vs 64bit) as your app?  Do both DLLs belong to the same OpenSSL version?  Are the DLLs for OpenSSL 1.0.2 or earlier, or for OpenSSL 1.1+?  The TIdSSLIOHandlerSocketOpenSSL component does not support OpenSSL 1.1+, you would have to use this SSLIOHandler instead, for the time being.

Copy the both dll's to an extra Folder to your  App-Directory to get sure that the App load the right Version that it needs
like /SSL/32 and /SSL/64 . . .

Place your needed ssleay.dll and libeay.dll Version into those predefined Places and let your Software load it from there.

C++Builder Example Code:

Code:

UnicodeString Path = GetCurrentDir();

#ifdef __WIN32__
  IdOpenSSLSetLibPath(Path+"\\SSL\\32\\");
#endif

#ifdef _WIN64
  IdOpenSSLSetLibPath(Path+"\\SSL\\64\\");
#endif

latest Version what i found is  1.0.2u   afaik. . .