Package org.jivesoftware.smackx.omemo.signal

Class SignalOmemoRatchet

java.lang.Object

org.jivesoftware.smackx.omemo.OmemoRatchet<org.whispersystems.libsignal.IdentityKeyPair,org.whispersystems.libsignal.IdentityKey,org.whispersystems.libsignal.state.PreKeyRecord,org.whispersystems.libsignal.state.SignedPreKeyRecord,org.whispersystems.libsignal.state.SessionRecord,org.whispersystems.libsignal.SignalProtocolAddress,org.whispersystems.libsignal.ecc.ECPublicKey,org.whispersystems.libsignal.state.PreKeyBundle,org.whispersystems.libsignal.SessionCipher>

org.jivesoftware.smackx.omemo.signal.SignalOmemoRatchet

public class SignalOmemoRatchet
extends OmemoRatchet<org.whispersystems.libsignal.IdentityKeyPair,org.whispersystems.libsignal.IdentityKey,org.whispersystems.libsignal.state.PreKeyRecord,org.whispersystems.libsignal.state.SignedPreKeyRecord,org.whispersystems.libsignal.state.SessionRecord,org.whispersystems.libsignal.SignalProtocolAddress,org.whispersystems.libsignal.ecc.ECPublicKey,org.whispersystems.libsignal.state.PreKeyBundle,org.whispersystems.libsignal.SessionCipher>

Field Summary

Fields inherited from class org.jivesoftware.smackx.omemo.OmemoRatchet

omemoManager, store

Method Summary

Modifier and Type	Method	Description
byte[]	doubleRatchetDecrypt(OmemoDevice sender, byte[] encryptedKey)	Decrypt a double-ratchet-encrypted message key.
CiphertextTuple	doubleRatchetEncrypt(OmemoDevice recipient, byte[] messageKey)	Encrypt a messageKey with the double ratchet session of the recipient.

Methods inherited from class java.lang.Object

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

Method Detail

doubleRatchetDecrypt

public byte[] doubleRatchetDecrypt(OmemoDevice sender,
                                   byte[] encryptedKey)
                            throws CorruptedOmemoKeyException,
                                   NoRawSessionException,
                                   CryptoFailedException,
                                   UntrustedOmemoIdentityException,
                                   java.io.IOException

Description copied from class: OmemoRatchet

Decrypt a double-ratchet-encrypted message key.

Specified by:

doubleRatchetDecrypt in class OmemoRatchet<org.whispersystems.libsignal.IdentityKeyPair,org.whispersystems.libsignal.IdentityKey,org.whispersystems.libsignal.state.PreKeyRecord,org.whispersystems.libsignal.state.SignedPreKeyRecord,org.whispersystems.libsignal.state.SessionRecord,org.whispersystems.libsignal.SignalProtocolAddress,org.whispersystems.libsignal.ecc.ECPublicKey,org.whispersystems.libsignal.state.PreKeyBundle,org.whispersystems.libsignal.SessionCipher>

Parameters:

sender - sender of the message.

encryptedKey - key encrypted with the ratchet of the sender.

Returns:

decrypted message key.

Throws:

CorruptedOmemoKeyException - if the OMEMO key is corrupted.

NoRawSessionException - when no double ratchet session was found.

CryptoFailedException - if the OMEMO cryptography failed.

UntrustedOmemoIdentityException - if the OMEMO identity is not trusted.

java.io.IOException - if an I/O error occurred.

doubleRatchetEncrypt

public CiphertextTuple doubleRatchetEncrypt(OmemoDevice recipient,
                                            byte[] messageKey)

Description copied from class: OmemoRatchet

Encrypt a messageKey with the double ratchet session of the recipient.

Specified by:

doubleRatchetEncrypt in class OmemoRatchet<org.whispersystems.libsignal.IdentityKeyPair,org.whispersystems.libsignal.IdentityKey,org.whispersystems.libsignal.state.PreKeyRecord,org.whispersystems.libsignal.state.SignedPreKeyRecord,org.whispersystems.libsignal.state.SessionRecord,org.whispersystems.libsignal.SignalProtocolAddress,org.whispersystems.libsignal.ecc.ECPublicKey,org.whispersystems.libsignal.state.PreKeyBundle,org.whispersystems.libsignal.SessionCipher>

Parameters:

recipient - recipient of the message.

messageKey - key we want to encrypt.

Returns:

encrypted message key.