Module dev.netcode.security
Package dev.netcode.security.encryption

Class RSAEncrypter

java.lang.Object
dev.netcode.security.encryption.RSAEncrypter
public class RSAEncrypter extends Object
This class simplifies the process of RSA Encrypting data. Using it you can generate RSA Keys and encrypt/decrypt data.

  • Constructor Details

    • RSAEncrypter

      public RSAEncrypter()

  • Method Details

    • generateKeyPair

      public static KeyPair generateKeyPair​(int size)
      Generates a KeyPair with given size. The higher the size, the more secure the key can be considered. Size must be divisible by 2.
      Parameters:
      size - of the keys to be generated
      Returns:
      the generated KeyPair

    • decrypt

      public static String decrypt​(byte[] cipher, PrivateKey privateKey)
      Decrypts RSA encrypted data
      Parameters:
      cipher - data to be decrypted
      privateKey - to be used to decrypt the data
      Returns:
      decrypted data as UTF-8 encoded String

    • encrypt

      public static byte[] encrypt​(String message, PublicKey publicKey)
      Encrypts a message using a RSA PublicKey
      Parameters:
      message - to be encrypted
      publicKey - ised to encrypt the data
      Returns:
      byte array of encrypted data

    • sign

      public static String sign​(PrivateKey privateKey, String input)
      Generates a RSA signature for a given input. The signature can be used to make sure a message comes from a specific sender
      Parameters:
      privateKey - used to sign the data
      input - data to be signed
      Returns:
      Signature as String

    • verifySignature

      public static boolean verifySignature​(PublicKey publicKey, String data, String signature)
      Verifies that a given signature matches given data and a given public key. This process ensures that the data really comes from the sender
      Parameters:
      publicKey - of the sender
      data - original data
      signature - to be tested
      Returns:
      true if the signature matches the data and public key

    • generatePublicKeyFromString

      public static PublicKey generatePublicKeyFromString​(byte[] key)
      Generates a public key from byte array
      Parameters:
      key - byte array
      Returns:
      public key

    • generatePrivateKeyFromString

      public static PrivateKey generatePrivateKeyFromString​(byte[] key)
      Generates a private key from byte array
      Parameters:
      key - byte array
      Returns:
      private key

    • keyToString

      public static String keyToString​(Key key)
      Encodes a Key to a String representation. The key will be encoded to Base64
      Parameters:
      key - to transform
      Returns:
      String representation

    • getFingerprint

      public static String getFingerprint​(PublicKey key)
      Generates a fingerprint string of a public key. The key has to be X509 compatible. The fingerprint will be SHA-1 representation of the key
      Parameters:
      key - to get the fingerprint of
      Returns:
      the fingerprint