Indy 9 does not support modern OpenSSL versions (like 1.0.x or 1.1.x).
uses IdSSLOpenSSL, // Your other uses
| Task | Status | |------|--------| | Delphi 7 project compiled with IdSSLIOHandlerSocketOpenSSL unit in uses | ☐ | | libeay32.dll (32-bit, 1.0.2.x) in EXE folder | ☐ | | ssleay32.dll (32-bit, matching version) in EXE folder | ☐ | | MSVC runtime present (either globally or msvcr90.dll alongside) | ☐ | | IdOpenSSLSetLibPath('.\') called before any connection | ☐ | | LoadOpenSSLLibrary returns True | ☐ | | IOHandler.SSLOptions.Method set to sslvTLSv1 or sslvSSLv23 | ☐ | | Target server does mandate TLS 1.2 only (or you have backported support) | ☐ |
In the modern web ecosystem, SSLv2, SSLv3, and TLS 1.0/1.1 have been globally deprecated due to severe security vulnerabilities (like POODLE and BEAST). Almost all modern web servers, APIs, and payment gateways now strictly mandate . Delphi 7 Indy 9 Could Not Load Ssl Library
While getting the 0.9.6 DLLs operational solves the immediate crash, deploying OpenSSL 0.9.6 in modern environments presents serious challenges. The 0.9.6 branch does not support modern TLS protocols (TLS 1.2 or TLS 1.3), meaning your Delphi 7 application will fail to connect to modern servers that enforce strict, up-to-date security protocols.
What Indy 9 expects
Here is the dirty secret:
The version of the OpenSSL DLLs present on the system is too new or too old for Indy 9 to recognize.
The DLLs do not support TLS 1.2/1.3, which is required by the server you are connecting to. 2. The Solution: Updating OpenSSL DLLs
The OpenSSL DLLs present are too old or too new for Indy 9 to recognize. Indy 9 does not support modern OpenSSL versions (like 1
Even after you load the DLLs, you might connect to https://api.modern.com and get:
Remember that modern Windows operating systems do not include these older OpenSSL libraries. You are responsible for redistributing them with your application as per OpenSSL's licensing terms.
: Select your TIdHTTP component (or TIdSMTP , etc.) and set its IOHandler property to the TIdSSLIOHandlerSocket component you just added. This tells Indy to use SSL for the connection. While getting the 0