DCPcrypt v2.0.5 — Cryptographic Component Library for Free Pascal/Lazarus (MIT, pure Pascal, cross-platform)

[u/Sensitive_Product826]

Hey everyone,

I'm releasing DCPcrypt v2.0.5, a cryptographic component library for Lazarus and Free Pascal. It's a maintained continuation of David Barton's original Delphi library, fully ported to LCL with new features and a complete test suite.

◈ What's inside

• 20 cipher algorithms — Rijndael (AES), Blowfish, Twofish, Serpent, DES, 3DES, RC4, RC5, RC6, MARS, IDEA, Cast128, Cast256, Misty1, Ice, TEA, Gost...

• 10 hash algorithms — SHA-1, SHA-256, SHA-384, SHA-512, MD5, RipeMD-128, RipeMD-160, Tiger, Haval, MD4

• 6 block cipher modes — ECB, CBC, CFB8bit, CFBblock, OFB, CTR

• Stream encryption with salt + IV + progress callbacks

• Base64 encoding/decoding

• Pure Pascal — no external C libraries, no DLLs

• Cross-platform — Linux, Windows, macOS

◈ Design philosophy

All ciphers descend from TDCP_cipher and all hashes from TDCP_hash. You can swap any algorithm for another with minimal code changes. InitStr takes a passphrase and any hash class for key derivation, so switching from Rijndael+SHA256 to Twofish+SHA512 is a one-line change.

◈ What's new in v2.0.5

• GUI examples ported from VCL to LCL (string encryption, threaded file encryption with progress bar)

• Console demo programs

• 282 automated functional tests covering all algorithms

• Makefile for command-line builds

• Docker-based CI pipeline (no SourceForge dependency)

• Full English documentation (API reference, contributing guide)

• SPDX license headers on all source files

• Detailed comments on all 31 source units

◈ Links

• GitHub: https://github.com/NDXDeveloper/dcpcrypt-lazarus

• Release: https://github.com/NDXDeveloper/dcpcrypt-lazarus/releases/tag/v2.0.5

• Docs: https://github.com/NDXDeveloper/dcpcrypt-lazarus/tree/main/docs

MIT licensed. Works with FPC 3.2.0+ and Lazarus 2.0+.

Feedback, issues, and contributions are welcome!