botanj

Botanj - Java Security Provider (JSP)

Index

1. Introduction
2. Building The Library
3. Supported Primitives
4. Using Botan JSP

Introduction

Botanj is a Java Security Provider (JSP) , which uses Botan to implements parts of the Java Cryptography Extension (JCE). This implementation is compatible with other JSPs (e.g. Bouncy Castle), thus enabling a smooth migration.

Botanj uses JNR-FFI for loading Botan native code.

Building The Library

• Install native Botan Library (tested with botan 2.{14/16}.0)
• Install Apache Maven
• Install Java 11+ (tested with openjdk 11)
• Run tests: mvn test

Supported Primitives

Ciphers, hashes, MACs, and checksums

• Authenticated cipher modes: EAX, OCB, GCM, SIV, CCM
• Cipher modes: CBC, CTR, CFB, OFB
• Block ciphers: AES, DES/3DES
• Stream ciphers: (X)Salsa20, (X)ChaCha20
• Hash functions: SHA-1, SHA-2, SHA-3, MD4, MD5, RIPEMD-160, BLAKE2b
• Message Authentication codes: HMAC, CMAC, Poly1305, SipHash

Public Key Cryptography

• Not yet supported

Public Key Infrastructure

• Not yes supported

Transport Layer Security (TLS) Protocol (JSSE)

• Not yet supported

Using Botanj

• An example describing the procedure to compute a MessageDigest object:

final MessageDigest digest = MessageDigest.getInstance("blake2b-512", BotanProvider.NAME);
final byte[] output = digest.digest("hello world".getBytes());

• An example describing the procedure to compute a MAC object:

final SecretKeySpec key = new SecretKeySpec(key, "HMAC-SHA512");
final Mac mac = Mac.getInstance("HMAC-SHA512", BotanProvider.NAME);
mac.init(key);
final byte[] output = mac.doFinal("hello world".getBytes());

• An example describing the procedure to encrypt using AES-256/GCM:

final Cipher cipher = Cipher.getInstance("AES-256/GCM/NoPadding", BotanProvider.NAME);
// Never reuse the IV with the same key
cipher.init(Cipher.ENCRYPT_MODE, key, iv);
cipher.updateAAD(aad);
final byte[] output = cipher.doFinal("hello world".getBytes());

• An example describing the procedure to encrypt using AES-256/CBC/PKCS7:

final Cipher cipher = Cipher.getInstance("AES-256/CBC/PKCS7", BotanProvider.NAME);
cipher.init(Cipher.ENCRYPT_MODE, key, iv);
final byte[] output = cipher.doFinal("hello world".getBytes());

• An example describing the procedure to encrypt using ChaCha20:

final Cipher cipher = Cipher.getInstance("ChaCha20/None/NoPadding", BotanProvider.NAME);
// Never reuse the IV with the same key
cipher.init(Cipher.ENCRYPT_MODE, key, iv);
final byte[] output = cipher.doFinal("hello world".getBytes());