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## org.bouncycastle.jce
Class X509KeyUsage

    java.lang.Object
      |
      +--org.bouncycastle.asn1.ASN1Encodable
            |
            +--org.bouncycastle.jce.X509KeyUsage

All Implemented Interfaces:
  DEREncodable

public class X509KeyUsage
extends ASN1Encodable

A holding class for constructing an X509 Key Usage extension.

        id-ce-keyUsage OBJECT IDENTIFIER ::=  { id-ce 15 }

        KeyUsage ::= BIT STRING {
             digitalSignature        (0),
             nonRepudiation          (1),
             keyEncipherment         (2),
             dataEncipherment        (3),
             keyAgreement            (4),
             keyCertSign             (5),
             cRLSign                 (6),
             encipherOnly            (7),
             decipherOnly            (8) }

Field Summary
`static int` | `cRLSign`
`static int` | `dataEncipherment`
`static int` | `decipherOnly`
`static int` | `digitalSignature`
`static int` | `encipherOnly`
`static int` | `keyAgreement`
`static int` | `keyCertSign`
`static int` | `keyEncipherment`
`static int` | `nonRepudiation`

Constructor Summary
`X509KeyUsage(int usage)` Basic constructor.

Method Summary
`DERObject` | `toASN1Object()`

Methods inherited from class org.bouncycastle.asn1.ASN1Encodable
`equals, getDERObject, getEncoded, hashCode`

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

Field Detail

### digitalSignature

    public static final int digitalSignature

See Also:
  Constant Field Values

### nonRepudiation

    public static final int nonRepudiation

See Also:
  Constant Field Values

### keyEncipherment

    public static final int keyEncipherment

See Also:
  Constant Field Values

### dataEncipherment

    public static final int dataEncipherment

See Also:
  Constant Field Values

### keyAgreement

    public static final int keyAgreement

See Also:
  Constant Field Values

### keyCertSign

    public static final int keyCertSign

See Also:
  Constant Field Values

### cRLSign

    public static final int cRLSign

See Also:
  Constant Field Values

### encipherOnly

    public static final int encipherOnly

See Also:
  Constant Field Values

### decipherOnly

    public static final int decipherOnly

See Also:
  Constant Field Values

Constructor Detail

### X509KeyUsage

    public X509KeyUsage(int usage)

  Basic constructor.

Parameters:
  `usage` - - the bitwise OR of the Key Usage flags giving the allowed uses for the key. e.g. (X509KeyUsage.keyEncipherment | X509KeyUsage.dataEncipherment)

Method Detail

### toASN1Object

    public DERObject toASN1Object()

  Specified by:
    `toASN1Object` in class `ASN1Encodable`

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