Package net.i2p.router.networkdb.kademlia

Class MessageWrapper

java.lang.Object
net.i2p.router.networkdb.kademlia.MessageWrapper
public class MessageWrapper extends Object
Method and class for garlic encrypting outbound netdb traffic, and sending keys and tags for others to encrypt inbound netdb traffic, including management of the ElGamal/AES tags.
Since:
0.7.10

  • Constructor Details

    • MessageWrapper

      public MessageWrapper()

  • Method Details

    • wrap

      static MessageWrapper.WrappedMessage wrap(RouterContext ctx, I2NPMessage m, Hash from, RouterInfo to)
      Garlic wrap a message from a client or this router, destined for a router, to hide the contents from the OBEP. Caller must call acked() or fail() on the returned object. ELGAMAL ONLY. Both from and to must support ElGamal.
      Parameters:
      from - must be a local client with a session key manager, or null to use the router's session key manager. SessionKeyManager MUST support ElGamal.
      to - must be ELGAMAL_2048 EncType
      Returns:
      null on encrypt failure

    • wrap

      public static GarlicMessage wrap(RouterContext ctx, I2NPMessage m, RouterInfo to)
      Garlic wrap a message from nobody, destined for a router, to hide the contents from the OBEP. Forces full asymmetric encryption.
      Parameters:
      to - must be ELGAMAL_2048 or ECIES_X25519 EncType
      Returns:
      null on encrypt failure
      Since:
      0.9.5, public since 0.9.50 for BuildRequestor

    • generateSession

      public static MessageWrapper.OneTimeSession generateSession(RouterContext ctx, long expiration)
      Create a single key and tag, for receiving a single encrypted message, and register it with the client's session key manager, to expire in the time specified. The recipient can then send us an AES- or ChaCha- encrypted message, avoiding full ElGamal or ECIES.
      Parameters:
      expiration - time from now
      Since:
      0.9.7

    • generateSession

      public static MessageWrapper.OneTimeSession generateSession(RouterContext ctx, Hash localDest, long expiration, boolean forceElG)
      Create a single key and tag, for receiving a single encrypted message, and register it with the client's session key manager, to expire in the time specified. The recipient can then send us an AES- or ChaCha- encrypted message, avoiding full ElGamal or ECIES.
      Parameters:
      expiration - time from now
      Returns:
      null if we can't find the SKM for the localDest
      Since:
      0.9.9

    • generateSession

      public static MessageWrapper.OneTimeSession generateSession(RouterContext ctx, SessionKeyManager skm, long expiration, boolean forceElG)
      Create a single key and tag, for receiving a single encrypted message, and register it with the client's session key manager, to expire in the time specified. The recipient can then send us an AES- or ChaCha- encrypted message, avoiding full ElGamal or ECIES.
      Parameters:
      expiration - time from now
      Returns:
      non-null
      Since:
      0.9.9

    • wrap

      public static GarlicMessage wrap(RouterContext ctx, I2NPMessage m, MessageWrapper.OneTimeSession session)
      Garlic wrap a message from nobody, destined for an unknown router, to hide the contents from the IBGW. Uses a supplied one-time session key tag for AES or AEAD encryption, avoiding ElGamal or X25519. Used by OCMJH for DSM.
      Parameters:
      session - non-null
      Returns:
      null on encrypt failure
      Since:
      0.9.12

    • wrap

      public static GarlicMessage wrap(RouterContext ctx, I2NPMessage m, SessionKey encryptKey, SessionTag encryptTag)
      Garlic wrap a message from nobody, destined for an unknown router, to hide the contents from the IBGW. Uses a supplied session key and session tag for AES encryption, avoiding ElGamal. Used by above and for DLM replies in HDLMJ.
      Parameters:
      encryptKey - non-null
      encryptTag - non-null
      Returns:
      null on encrypt failure
      Since:
      0.9.7

    • wrap

      public static GarlicMessage wrap(RouterContext ctx, I2NPMessage m, SessionKey encryptKey, RatchetSessionTag encryptTag)
      Garlic wrap a message from nobody, destined for an unknown router, to hide the contents from the IBGW. Uses a supplied session key and session tag for ratchet encryption, avoiding full ECIES. Used by above and for DLM replies in HDLMJ.
      Parameters:
      encryptKey - non-null
      encryptTag - non-null
      Returns:
      null on encrypt failure
      Since:
      0.9.46