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## gnu.crypto.key.rsa
Class GnuRSAPublicKey

    java.lang.Object
      |
      +--gnu.crypto.key.rsa.GnuRSAKey
            |
            +--gnu.crypto.key.rsa.GnuRSAPublicKey

All Implemented Interfaces:
  java.security.Key, java.security.PublicKey, java.security.interfaces.RSAKey, java.security.interfaces.RSAPublicKey, java.io.Serializable

public class GnuRSAPublicKey
extends GnuRSAKey
implements java.security.PublicKey, java.security.interfaces.RSAPublicKey

An object that encapsulates an RSA public key.

References:

1. RSA-PSS Signature Scheme with Appendix, part B.
   Primitive specification and supporting documentation.
   Jakob Jonsson and Burt Kaliski.

See Also:
  Serialized Form

Field Summary

Fields inherited from interface java.security.PublicKey
`serialVersionUID`

Constructor Summary
`GnuRSAPublicKey(java.math.BigInteger n, java.math.BigInteger e)` Trivial constructor.

Method Summary
`boolean` | `equals(java.lang.Object obj)` Returns `true` if the designated object is an instance of this class and has the same RSA parameter values as this one.
`byte[]` | `getEncoded(int format)` Returns the encoded form of this public key according to the designated format.
`static GnuRSAPublicKey` | `valueOf(byte[] k)` A class method that takes the output of the `encodePublicKey()` method of an RSA keypair codec object (an instance implementing `IKeyPairCodec` for RSA keys, and re-constructs an instance of this object.

Methods inherited from class gnu.crypto.key.rsa.GnuRSAKey
`getAlgorithm, getE, getEncoded, getFormat, getModulus, getN, getPublicExponent`

Methods inherited from class java.lang.Object
`clone, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Methods inherited from interface java.security.Key
`getAlgorithm, getEncoded, getFormat`

Methods inherited from interface java.security.interfaces.RSAPublicKey
`getPublicExponent`

Methods inherited from interface java.security.interfaces.RSAKey
`getModulus`

Constructor Detail

### GnuRSAPublicKey

    public GnuRSAPublicKey(java.math.BigInteger n,
                           java.math.BigInteger e)

  Trivial constructor.

Parameters:
  `n` - the modulus.
  `e` - the public exponent.

Method Detail

### valueOf

    public static GnuRSAPublicKey valueOf(byte[] k)

  A class method that takes the output of the `encodePublicKey()` method of an RSA keypair codec object (an instance implementing `IKeyPairCodec` for RSA keys, and re-constructs an instance of this object.

  Parameters:
    `k` - the contents of a previously encoded instance of this object.
  Throws:
    `java.lang.ArrayIndexOutOfBoundsException` - if there is not enough bytes, in `k`, to represent a valid encoding of an instance of this object.
    `java.lang.IllegalArgumentException` - if the byte sequence does not represent a valid encoding of an instance of this object.

### getEncoded

    public byte[] getEncoded(int format)

  Returns the encoded form of this public key according to the designated format.

  Specified by:
    `getEncoded` in class `GnuRSAKey`
  Parameters:
    `format` - the desired format identifier of the resulting encoding.
  Returns:
    the byte sequence encoding this key according to the designated format.
  Throws:
    `java.lang.IllegalArgumentException` - if the format is not supported.
  See Also:
    `RSAKeyPairRawCodec`

### equals

    public boolean equals(java.lang.Object obj)

  Returns `true` if the designated object is an instance of this class and has the same RSA parameter values as this one.

  Overrides:
    `equals` in class `GnuRSAKey`
  Parameters:
    `obj` - the other non-null RSA key to compare to.
  Returns:
    `true` if the designated object is of the same type and value as this one.

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Copyright © 2001, 2002, 2003, 2004 Free Software Foundation, Inc.