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Ballerina Crypto Library

This library provides common cryptographic mechanisms based on different algorithms.

The Ballerina crypto library facilitates APIs to do operations like hashing, HMAC generation, checksum generation, encryption, decryption, signing data digitally, verifying digitally signed data, etc., with different cryptographic algorithms.

Hashes

The crypto library supports generating hashes with 5 different hash algorithms MD5, SHA1, SHA256, SHA384, and SHA512. Also, it supports generating the CRC32B checksum.

HMAC

The crypto library supports generating HMAC with 5 different hash algorithms: MD5, SHA1, SHA256, SHA384, and SHA512.

Decode private/public key

The crypto library supports decoding the RSA private key from a .p12 file and a key file in the PEM format. Also, it supports decoding a public key from a .p12 file and a certificate file in the X509 format. Additionally, this supports building an RSA public key with the modulus and exponent parameters.

Encrypt and decrypt

The crypto library supports both symmetric key encryption/decryption and asymmetric key encryption/decryption. The RSA algorithm can be used for asymmetric-key encryption/decryption with the use of private and public keys. The AES algorithm can be used for symmetric-key encryption/decryption with the use of a shared key.

Sign and verify

The crypto library supports signing data using the RSA private key and verification of the signature using the RSA public key. This supports MD5, SHA1, SHA256, SHA384, and SHA512 digesting algorithms, and ML-DSA-65 post-quantum signature algorithm as well.

Key Derivation Function (KDF)

The crypto module supports HMAC-based Key Derivation Function (HKDF). HKDF is a key derivation function that uses a Hash-based Message Authentication Code (HMAC) to derive keys.

Key Exchange Mechanism (KEM)

The crypto module supports Key Exchange Mechanisms (KEM). It includes RSA-KEM and post-quantum ML-KEM-768 for both encapsulation and decapsulation.

Hybrid Public Key Encryption (HPKE)

The crypto module supports Hybrid Public Key Encryption (HPKE). It supports post-quantum ML-KEM-768-HPKE and RSA-KEM-ML-KEM-768-HPKE for encryption and decryption.

Issues and projects

Issues and Projects tabs are disabled for this repository as this is part of the Ballerina Standard Library. To report bugs, request new features, start new discussions, view project boards, etc., go to the Ballerina Standard Library parent repository.

This repository only contains the source code for the module.

Build from the source

Set up the prerequisites

Download and install Java SE Development Kit (JDK) version 21 (from one of the following locations).
- Oracle
- OpenJDK
  
  Note: Set the JAVA_HOME environment variable to the path name of the directory into which you installed JDK.
Export your GitHub Personal Access Token (PAT) with the read package permission as follows:
```
export packageUser=<Username>
export packagePAT=<Personal Access Token>
```

Build the source

Execute the commands below to build from the source.

To build the package:
```
./gradlew clean build
```
To run the tests:
```
./gradlew clean test
```

To run a group of tests

./gradlew clean test -Pgroups=<test_group_names>

To build the without the tests:
```
./gradlew clean build -x test
```
To debug package implementation:
```
./gradlew clean build -Pdebug=<port>
```

To debug with Ballerina language:

./gradlew clean build -PbalJavaDebug=<port>

Publish the generated artifacts to the local Ballerina central repository:
```
./gradlew clean build -PpublishToLocalCentral=true
```
Publish the generated artifacts to the Ballerina central repository:
```
./gradlew clean build -PpublishToCentral=true
```

Contribute to Ballerina

As an open source project, Ballerina welcomes contributions from the community.

For more information, go to the contribution guidelines.

Code of conduct

All contributors are encouraged to read the Ballerina Code of Conduct.

Useful links

For more information go to the crypto library.
For example demonstrations of the usage, go to Ballerina By Examples.
Chat live with us via our Discord server.
Post all technical questions on Stack Overflow with the #ballerina tag.