Package com.google.crypto.tink.aead.internal

Class LegacyFullAead

  • All Implemented Interfaces:
    Aead
    public class LegacyFullAead
extends java.lang.Object
implements Aead
    Takes an arbitrary raw AEAD and makes it a full primitive. This is a class that helps us transition onto the new Keys and Configurations interface, by bringing potential user-defined primitives to a common denominator with our primitives over which we have control.

    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      static Aead create​(Aead rawAead, Bytes outputPrefix)  
      static Aead create​(LegacyProtoKey key)
      This method covers the cases where users created their own aead/key classes.
      byte[] decrypt​(byte[] ciphertext, byte[] associatedData)
      Decrypts ciphertext with associatedData as associated authenticated data.
      byte[] encrypt​(byte[] plaintext, byte[] associatedData)
      Encrypts plaintext with associatedData as associated authenticated data.

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Method Detail

      • create

        public static Aead create​(LegacyProtoKey key)
                   throws java.security.GeneralSecurityException
        This method covers the cases where users created their own aead/key classes.
        Throws:
        java.security.GeneralSecurityException

      • create

        public static Aead create​(Aead rawAead,
                          Bytes outputPrefix)

      • encrypt

        public byte[] encrypt​(byte[] plaintext,
                      byte[] associatedData)
               throws java.security.GeneralSecurityException
        Description copied from interface: Aead
        Encrypts plaintext with associatedData as associated authenticated data. The resulting ciphertext allows for checking authenticity and integrity of associated data (associatedData), but does not guarantee its secrecy.
        Specified by:
        encrypt in interface Aead
        Parameters:
        plaintext - the plaintext to be encrypted. It must be non-null, but can also be an empty (zero-length) byte array
        associatedData - associated data to be authenticated, but not encrypted. Associated data is optional, so this parameter can be null. In this case the null value is equivalent to an empty (zero-length) byte array. For successful decryption the same associatedData must be provided along with the ciphertext.
        Returns:
        resulting ciphertext
        Throws:
        java.security.GeneralSecurityException

      • decrypt

        public byte[] decrypt​(byte[] ciphertext,
                      byte[] associatedData)
               throws java.security.GeneralSecurityException
        Description copied from interface: Aead
        Decrypts ciphertext with associatedData as associated authenticated data. The decryption verifies the authenticity and integrity of the associated data, but there are no guarantees wrt. secrecy of that data.
        Specified by:
        decrypt in interface Aead
        Parameters:
        ciphertext - the plaintext to be decrypted. It must be non-null.
        associatedData - associated data to be authenticated. For successful decryption it must be the same as associatedData used during encryption. Can be null, which is equivalent to an empty (zero-length) byte array.
        Returns:
        resulting plaintext
        Throws:
        java.security.GeneralSecurityException - if decryption fails. Decryption must fail if ciphertext is not correctly authenticated for the given associatedData.