Question 1

How do I encrypt a file with AES using Delphi OpenSSL?

Accepted Answer

Use the TEncUtil class: set Cipher to 'AES-256', assign a passphrase, and call Encrypt method. The README shows an example with Base64 encoding, similar to OpenSSL command 'enc -aes256'.

Question 2

Delphi OpenSSL vs TurboPower LockBox for cryptography?

Accepted Answer

Delphi OpenSSL wraps OpenSSL for robust, industry-standard algorithms and cross-platform support, while LockBox is a native Pascal library with no external dependencies but may lag in modern cryptographic features. Choose based on need for OpenSSL compatibility vs. pure Delphi implementation.

Question 3

Is Delphi OpenSSL compatible with OpenSSL 3.0?

Accepted Answer

Only experimentally through TaurusTLS, which is marked as unstable in the README. For production, stick to older OpenSSL versions or be prepared for potential issues and limited support.

Question 4

How to install OpenSSL DLLs for my Delphi app deployment?

Accepted Answer

Download OpenSSL binaries for Windows, place 32-bit DLLs in SysWOW64 and 64-bit in System32 as per README instructions. On iOS/Android, link static libraries, but ensure correct versions to avoid runtime errors.

Question 5

Can Delphi OpenSSL generate self-signed certificates for SSL?

Accepted Answer

Yes, use TReqUtil.GenerateSelfSignedCertificate method with parameters like subject and validity days. The README provides a code snippet matching the OpenSSL 'req -x509' command for easy implementation.

Question 6

What's the performance hit of using this wrapper over direct OpenSSL calls?

Accepted Answer

The object-oriented layer adds some overhead, such as memory management for classes, but it simplifies development. For high-throughput scenarios, profile your app; direct API calls might be faster but require more code.

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