crypto

A simple fast encryption library for the JVM uses standard best practices and standard JVM classes

Releases

<dependency>
  <groupId>com.github.gerritjvv</groupId>
  <artifactId>crypto-core</artifactId>
  <version>LATEST</version>
</dependency>

Password derivation

If you're not using an encryption key but directly using the user password, you must first run a key derivation routine on it.

byte[] pass = Key.deriveHmac256FromPass(null, "user-pass");

and then you can use:

byte[] key = Key.KeySize.AES_128.genKeysHmacSha(pass);

AES CBC

AES CBC encryption is HMACed and the result message contains

• version byte
• secure random iv
• hmac
• cipher message

import crypto.AES;
import crypto.Key;
import crypto.Util;


// generate some random data to encrypt
byte[] pass = crypto.Util.genData(4096);

byte[] someData = "Some Data".getBytes();

// generate encryption and authentication keys
Key.ExpandedKey key = Key.KeySize.AES_128.genKeysHmacSha(pass);

// encrypt the data
byte[] encryptedData = crypto.AES.encryptCBC(key, someData);

// decrypt it
byte[] decryptedData = crypto.AES.decryptCBC(key, encryptedData);

AES GCM

AES GCM encryption is authenticated (so no HMAC is required).
The result message contains:

• version byte
• secure random iv
• cipher message

import crypto.AES;
import crypto.Key;
import crypto.Util;


// generate some random data to encrypt
byte[] pass = crypto.Util.genData(4096);

byte[] someData = "Some Data".getBytes();

// generate encryption and authentication keys
Key.ExpandedKey key = Key.KeySize.AES_128.genKeysHmacSha(pass);

// encrypt the data
byte[] encryptedData = crypto.AES.encryptGCM(key, someData);

// decrypt it
byte[] decryptedData = crypto.AES.decryptGCM(key, encryptedData);

More examples:

See: AESTest.java

License

https://www.apache.org/licenses/LICENSE-2.0

Contributors

Contributions PRs and suggestions are always welcome.

Please ping me directly in the "issues" on "gerritjvv" or send me an email at gerritjvv@gmail.com, this way the issues/pull-requests won't just linger if github notifications doens't work.

Guide on publishing to maven central

https://dzone.com/articles/publish-your-artifacts-to-maven-central

Release Process:

Follow:

https://www.rainerhahnekamp.com/en/publishing-a-java-library-to-maven-central/

Repository staging is deployed to https://oss.sonatype.org