Package net.i2p.router.tunnel
Interface IVValidator
- All Known Implementing Classes:
BloomFilterIVValidator
,DummyValidator
,HashSetIVValidator
public interface IVValidator
Provide a generic interface for IV validation which may be implemented
through something as simple as a hashtable or more a complicated
bloom filter.
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Method Summary
Modifier and TypeMethodDescriptionboolean
receiveIV
(byte[] iv, int ivOffset, byte[] payload, int payloadOffset) receive the IV for the tunnel message, returning true if it is valid, or false if it has already been used (or is otherwise invalid).
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Method Details
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receiveIV
boolean receiveIV(byte[] iv, int ivOffset, byte[] payload, int payloadOffset) receive the IV for the tunnel message, returning true if it is valid, or false if it has already been used (or is otherwise invalid). To prevent colluding attackers from successfully tagging the tunnel by switching the IV and the first block of the message, the validator should treat the XOR of the IV and the first block as the unique identifier, not the IV alone (since the tunnel is encrypted via AES/CBC). Thanks to dvorak for pointing out that tagging!- Parameters:
iv
- data will not be modifiedpayload
- will not be modified
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