A Java 21 implementation of the GOST R 34.12-2015 block cipher (RFC 8891). This is an updated version of the older GOST 28147-89 (RFC 5830) block cipher with support for 64-bit ("Magma") and 128-bit ("Kuznyechik") blocks. The top-level API defaults to the 64-bit mode, hence the name.
The GOST cipher was originally developed for the Soviet government in the 1970s, declassified in 1994, and revised in 2015. Despite its flaws, GOST is still used in some applications as a DES alternative.
implementation("io.github.wasabithumb:magma4j:0.1.0")implementation 'io.github.wasabithumb:magma4j:0.1.0'<dependency>
<groupId>io.github.wasabithumb</groupId>
<artifactId>magma4j</artifactId>
<version>0.1.0</version>
<scope>compile</scope>
</dependency>byte[] key = Magma.generateKey();
// key = Magma.generateKeyFromPassword("password");
byte[] data = "super secret".getBytes(StandardCharsets.UTF_8);
byte[] encrypted = Magma.encrypt(key, data);
byte[] decrypted = Magma.decrypt(key, encrypted);MagmaCipher cipher = Magma.newCipher()
.blockLength(128)
.mode(CipherMode.CBC)
.padding(PaddingMethod.PKCS5)
.build();
// Use cipher#encrypt, cipher#decrypt, etc.try (OutputStream os = /* ... */;
MagmaOutputStream mos = Magma.newOutputStream(os, key)
) {
// mos.write(...);
}
try (InputStream is = /* ... */;
MagmaInputStream mis = Magma.newInputStream(is, key)
) {
// mis.read(...);
}- Thanks to gostCrypto by Rudolf Nickolaev for providing a working implementation of the GOST ciphers to test against
Copyright 2024 Wasabi Codes
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
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