# Package org.bouncycastle.asn1.x9

Support classes useful for encoding and supporting X9.62 elliptic curve.

- Interface Summary
  Interface | Description
  --- | ---
  X9ObjectIdentifiers | Object identifiers for the various X9 standards.

- Class Summary
  Class | Description
  --- | ---
  DHDomainParameters | Deprecated. use DomainParameters
  DHPublicKey | X9.42 definition of a DHPublicKey
  DHValidationParms | Deprecated. use ValidationParams
  DomainParameters | X9.44 Diffie-Hellman domain parameters.
  ECNamedCurveTable | A general class that reads all X9.62 style EC curve tables.
  KeySpecificInfo | ASN.1 def for Diffie-Hellman key exchange KeySpecificInfo structure.
  OtherInfo | ASN.1 def for Diffie-Hellman key exchange OtherInfo structure.
  ValidationParams | Diffie-Hellman domain validation parameters.
  X962NamedCurves | Table of the current named curves defined in X.962 EC-DSA.
  X962Parameters | The Parameters ASN.1 CHOICE from X9.62.
  X9Curve | ASN.1 def for Elliptic-Curve Curve structure.
  X9ECParameters | ASN.1 def for Elliptic-Curve ECParameters structure.
  X9ECParametersHolder | A holding class that allows for X9ECParameters to be lazily constructed.
  X9ECPoint | Class for describing an ECPoint as a DER object.
  X9FieldElement | class for processing an FieldElement as a DER object.
  X9FieldID | ASN.1 def for Elliptic-Curve Field ID structure.
  X9IntegerConverter | A class which converts integers to byte arrays, allowing padding and calculations to be done according the the filed size of the curve or field element involved.