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## org.bouncycastle.asn1.x509
Class KeyUsage

    java.lang.Object
      org.bouncycastle.asn1.ASN1Encodable
          org.bouncycastle.asn1.DERObject
              org.bouncycastle.asn1.DERBitString
                  org.bouncycastle.asn1.x509.KeyUsage

All Implemented Interfaces:
  DEREncodable, DERString, DERTags

    public class KeyUsage

extends DERBitString

The KeyUsage object.

        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`

Fields inherited from class org.bouncycastle.asn1.DERBitString
`data, padBits`

Fields inherited from interface org.bouncycastle.asn1.DERTags
`APPLICATION, BIT_STRING, BMP_STRING, BOOLEAN, CONSTRUCTED, ENUMERATED, EXTERNAL, GENERAL_STRING, GENERALIZED_TIME, GRAPHIC_STRING, IA5_STRING, INTEGER, NULL, NUMERIC_STRING, OBJECT_IDENTIFIER, OCTET_STRING, PRINTABLE_STRING, SEQUENCE, SEQUENCE_OF, SET, SET_OF, T61_STRING, TAGGED, UNIVERSAL_STRING, UTC_TIME, UTF8_STRING, VIDEOTEX_STRING, VISIBLE_STRING`

Constructor Summary
`KeyUsage(DERBitString usage)`
`KeyUsage(int usage)` Basic constructor.

Method Summary
`java.lang.String` | `toString()`

Methods inherited from class org.bouncycastle.asn1.DERBitString
`equals, getBytes, getBytes, getInstance, getInstance, getPadBits, getPadBits, getString, hashCode, intValue`

Methods inherited from class org.bouncycastle.asn1.DERObject
`toASN1Object`

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

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

### KeyUsage

    public KeyUsage(int usage)

  Basic constructor.

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

### KeyUsage

    public KeyUsage(DERBitString usage)

Method Detail

### toString

    public java.lang.String toString()

  Overrides:
    `toString` in class `java.lang.Object`

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