CryptoLib4Pascal

Comprehensive cryptographic library for modern Object Pascal

---

CryptoLib4Pascal brings production-grade cryptography to Delphi and FreePascal. From AES-GCM and ChaCha20-Poly1305 to ECDSA, EdDSA, RSA, Argon2, and X.509 certificates -- everything you need to build secure applications in Object Pascal, released under the permissive MIT License.

Table of Contents

• Features
• Available Algorithms
• Getting Started
• Quick Examples
• Supported Platforms
• Running Tests
• Dependencies
• Contributing
• Acknowledgements
• Tip Jar
• License
• Branding

Features

• Symmetric encryption -- AES, Rijndael, Blowfish, Speck, ChaCha, (X)Salsa20
• Authenticated encryption (AEAD) -- GCM, GCM-SIV, CCM, EAX, OCB, ChaCha20-Poly1305
• Asymmetric cryptography -- RSA, DSA, ECDSA, EdDSA (Ed25519, Ed448), ECNR, Schnorr (Bip340), MuSig2 (Bip327)
• Key exchange -- DH, ECDH, X25519, X448
• Hashing -- SHA-2, SHA-3, Blake2, Keccak, RIPEMD, and more
• Password hashing -- Argon2 (2i/2d/2id), Scrypt, PBKDF2
• MACs -- HMAC, CMAC, KMAC, GMac, Poly1305, SipHash
• X.509 certificates -- generation and parsing
• PEM encoding -- OpenSSL-compatible import/export
• Cross-platform -- Windows, Linux, macOS, iOS, Android, Solaris, and BSDs

Available Algorithms

Symmetric Encryption

Block Ciphers

AES (128, 192, 256) | Rijndael | Blowfish | Speck

Stream Ciphers

ChaCha | (X)Salsa20

AEAD Ciphers

AES-GCM | AES-GCM-SIV | AES-CCM | AES-EAX | AES-OCB | ChaCha20-Poly1305

Block Cipher Modes

ECB | CBC | CFB | CTR | CTS | OFB | SIC

Block Cipher Padding Schemes

PKCS#5 | PKCS#7 | ISO 10126-2 | ISO 7816-4 | ISO/IEC 9797-1 (Bit) | ANSI X9.23 | TBC | Zero

Asymmetric Cryptography

• RSA -- PKCS#1, OAEP, PSS, ISO 9796
• DSA / Deterministic DSA
• ECDSA -- NIST, X9.62, SEC2, Brainpool curves
• ECNR
• EdDSA -- Ed25519, Ed448
• Schnorr -- Bip340
• MuSig2 -- Bip327

Key Agreement / Exchange

DH | ECDH | ECDHC | X25519 | X448

Key Derivation Functions

HKDF | KDF1 | KDF2

Password Hashing

Argon2 (2i, 2d, 2id) | Scrypt | PBKDF2

MACs

HMAC (all supported hashes) | CMAC | KMAC (128, 256) | GMac | Poly1305 | SipHash

Hash Functions

Family	Variants
MD	MD2, MD4, MD5
SHA-1	SHA-1
SHA-2	224, 256, 384, 512, 512-224, 512-256
SHA-3	224, 256, 384, 512
Keccak	224, 256, 288, 384, 512
Blake2B	160, 256, 384, 512
Blake2S	128, 160, 224, 256
RIPEMD	128, 160, 256, 320
GOST	3411, 3411-2012 (256, 512)
Others	Tiger, WhirlPool

XOF (Extendable Output Functions)

Shake-128 | Shake-256

Utilities

• System RNG wrappers
• ASN.1 parsing
• Base encoding/decoding (Hex, Base64, etc.)
• X.509 certificate generation and parsing
• OpenSSL-compatible PEM reader/writer

Getting Started

Prerequisites

Compiler	Minimum Version
Delphi	Sydney (10.4) or later
FreePascal	3.2.2 or later

Installation

1. Clone the repository:

git clone https://github.com/Xor-el/CryptoLib4Pascal.git

2a. Delphi

• Open and install the package: CryptoLib/src/Packages/Delphi/CryptoLib4PascalPackage.dpk
• Also install the required dependency packages: HashLib4Pascal and SimpleBaseLib4Pascal
• Add the CryptoLib/src subdirectories to your project's search path

2b. FreePascal / Lazarus

• Open and install the package: CryptoLib/src/Packages/FPC/CryptoLib4PascalPackage.lpk
• Also install the required dependency packages: HashLib4Pascal and SimpleBaseLib4Pascal

Quick Examples

AES-CBC Encrypt / Decrypt

uses
  ClpIBufferedCipher, ClpCipherUtilities, ClpParameterUtilities,
  ClpParametersWithIV, ClpConverters, ClpSecureRandom, ClpISecureRandom,
  ClpICipherParameters;

var
  LCipher: IBufferedCipher;
  LRandom: ISecureRandom;
  LKey, LIV, LPlain, LCipherText, LDecrypted: TBytes;
  LParams: ICipherParameters;
begin
  LRandom := TSecureRandom.Create();

  // Generate a random 256-bit key and 128-bit IV
  SetLength(LKey, 32);
  SetLength(LIV, 16);
  LRandom.NextBytes(LKey);
  LRandom.NextBytes(LIV);

  LParams := TParametersWithIV.Create(
    TParameterUtilities.CreateKeyParameter('AES', LKey), LIV);

  LPlain := TConverters.ConvertStringToBytes('Secret message', TEncoding.UTF8);

  // Encrypt
  LCipher := TCipherUtilities.GetCipher('AES/CBC/PKCS7PADDING');
  LCipher.Init(True, LParams);
  LCipherText := LCipher.DoFinal(LPlain);

  // Decrypt
  LCipher.Init(False, LParams);
  LDecrypted := LCipher.DoFinal(LCipherText);
end;

SHA-256 Hashing

uses
  ClpIDigest, ClpDigestUtilities, ClpConverters, ClpEncoders;

var
  LDigest: IDigest;
  LInput, LHash: TBytes;
begin
  LInput := TConverters.ConvertStringToBytes('Hello CryptoLib', TEncoding.UTF8);

  LDigest := TDigestUtilities.GetDigest('SHA-256');
  SetLength(LHash, LDigest.GetDigestSize);
  LDigest.BlockUpdate(LInput, 0, Length(LInput));
  LDigest.DoFinal(LHash, 0);

  WriteLn('SHA-256: ', THexEncoder.Encode(LHash, False));
end;

ECDSA Sign / Verify

uses
  ClpECUtilities, ClpIX9ECParametersHolder, ClpECParameters, ClpIECParameters,
  ClpSignerUtilities, ClpISigner, ClpConverters, ClpGeneratorUtilities,
  ClpSecureRandom, ClpISecureRandom, ClpECGenerators, ClpIECGenerators,
  ClpIAsymmetricCipherKeyPair, ClpIAsymmetricCipherKeyPairGenerator;

var
  LCurve: IX9ECParameters;
  LDomain: IECDomainParameters;
  LKpg: IAsymmetricCipherKeyPairGenerator;
  LKp: IAsymmetricCipherKeyPair;
  LSigner: ISigner;
  LMsg, LSig: TBytes;
begin
  // Set up the secp256k1 curve
  LCurve := TECUtilities.FindECCurveByName('secp256k1');
  LDomain := TECDomainParameters.Create(LCurve.Curve, LCurve.G,
    LCurve.N, LCurve.H, LCurve.GetSeed);

  // Generate a key pair
  LKpg := TGeneratorUtilities.GetKeyPairGenerator('ECDSA');
  LKpg.Init(TECKeyGenerationParameters.Create(LDomain,
    TSecureRandom.Create() as ISecureRandom));
  LKp := LKpg.GenerateKeyPair();

  LMsg := TConverters.ConvertStringToBytes('Sign me', TEncoding.UTF8);

  // Sign
  LSigner := TSignerUtilities.GetSigner('SHA-256withECDSA');
  LSigner.Init(True, LKp.Private);
  LSigner.BlockUpdate(LMsg, 0, Length(LMsg));
  LSig := LSigner.GenerateSignature();

  // Verify
  LSigner.Init(False, LKp.Public);
  LSigner.BlockUpdate(LMsg, 0, Length(LMsg));
  Assert(LSigner.VerifySignature(LSig));
end;

More examples (RSA, certificates, password hashing, etc.) are available in the CryptoLib.Examples directory.

Supported Platforms

OS	Delphi	FreePascal
Windows (XP and later)	✅	✅
Linux	❓	✅
macOS	❓	✅
Oracle Solaris	➖	✅
BSD (FreeBSD)	➖	✅
Android	❓	❓
iOS 2.0+	❓	❓

✅ Tested and passing · ❓ Untested · ➖ Not applicable

Architectures: I386, X86_64, ARM32, AArch64

Running Tests

Tests use DUnit (Delphi) and FPCUnit (FreePascal).

Delphi: Open CryptoLib.Tests/Delphi.Tests/CryptoLib.Tests.dpr in the IDE and run.

FreePascal / Lazarus: Open CryptoLib.Tests/FreePascal.Tests/CryptoLib.Tests.lpi in the IDE and run.

Dependencies

CryptoLib4Pascal requires two companion libraries that must be installed separately:

Dependency	Purpose
HashLib4Pascal	Hash function implementations
SimpleBaseLib4Pascal	Base encoding/decoding

Contributing

Contributions are welcome. Please open an issue for bug reports or feature requests, and submit pull requests.

Sponsors

• Sphere 10 Software

Tip Jar

If you find this library useful and would like to support its continued development, tips are greatly appreciated! 🙏

Cryptocurrency	Wallet Address
Bitcoin (BTC)	bc1quqhe342vw4ml909g334w9ygade64szqupqulmu
Ethereum (ETH)	0x53651185b7467c27facab542da5868bfebe2bb69
Solana (SOL)	BPZHjY1eYCdQjLecumvrTJRi5TXj3Yz1vAWcmyEB9Miu

License

CryptoLib4Pascal is released under the MIT License.