# Package net.i2p.data

These classes define the common data structures used by the various I2P protocols.

See: Description

Interface Summary
Interface | Description
--- | ---
DataStructure | Defines the class as a standard object with particular bit representation, exposing methods to read and write that representation.

Class Summary
Class | Description
--- | ---
Address | ???????? deprecated unused except by naming/FilesystemAddressDB, which is unused.
Base32 | Encodes and decodes to and from Base32 notation.
Base64 | Encodes and decodes to and from Base64 notation.
ByteArray | Wrap up an array of bytes so that they can be compared and placed in hashes, maps, and the like.
Certificate | Defines a certificate that can be attached to various I2P structures, such as RouterIdentity and Destination, allowing routers and clients to help manage denial of service attacks and the network utilization.
DatabaseEntry | Base implementation of common methods for the two data structures that are stored in the netDb, i.e.
DataHelper | Defines some simple IO routines for dealing with marshalling data structures
DataStructureImpl | Base implementation of all data structures
DateAndFlags | A six-byte Date and 2 bytes of flags, since a Date won't encroach on the top two bytes until the year 10889.
Destination | Defines an end point in the I2P network.
Hash | Defines the hash as defined by the I2P data structure spec.
KeysAndCert | KeysAndCert has a public key, a signing key, and a certificate.
Lease | Defines the proof that a particular router / tunnel is allowed to receive messages for a particular Destination during some period of time.
LeaseSet | Defines the set of leases a destination currently has.
Payload | Defines the actual payload of a message being delivered, including the standard encryption wrapping, as defined by the I2P data structure spec.
PrivateKey | Defines the PrivateKey as defined by the I2P data structure spec.
PrivateKeyFile | This helper class reads and writes files in the same "eepPriv.dat" format used by the client code.
PublicKey | Defines the PublicKey as defined by the I2P data structure spec.
RouterAddress | Defines a method of communicating with a router
RouterIdentity | Defines the unique identifier of a router, including any certificate or public key.
RouterInfo | Defines the data that a router either publishes to the global routing table or provides to trusted peers.
RoutingKeyGenerator | Component to manage the munging of hashes into routing keys - given a hash, perform some consistent transformation against it and return the result.
SDSCache<V extends SimpleDataStructure> | A least recently used cache with a max size, for SimpleDataStructures.
SessionKey | Defines the SessionKey as defined by the I2P data structure spec.
SessionTag | 32 bytes, usually of random data.
Signature | Defines the signature as defined by the I2P data structure spec.
SigningPrivateKey | Defines the SigningPrivateKey as defined by the I2P data structure spec.
SigningPublicKey | Defines the SigningPublicKey as defined by the I2P data structure spec.
SimpleDataStructure | A SimpleDataStructure contains only a single fixed-length byte array.
TunnelId | Defines the tunnel ID that messages are passed through on a set of routers.
VerifiedDestination | Extend Destination with methods to verify its Certificate.

Exception Summary
Exception | Description
--- | ---
DataFormatException | Thrown when the data was not available to read or write a DataStructure

## Package net.i2p.data Description

These classes define the common data structures used by the various I2P protocols.