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Spongy Castle is a package-rename (org.bouncycastle.* to org.spongycastle.*) of Bouncy Castle intended for Android.
Android ships with a stripped-down version of Bouncy Castle - this causes classloader collisions if you try to add
an alternative (updated/complete) Bouncy Castle jar.
This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.5.
package org.spongycastle.asn1.x509;
import org.spongycastle.asn1.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) }
*
*/
public class KeyUsage
extends DERBitString
{
public static final int digitalSignature = (1 << 7);
public static final int nonRepudiation = (1 << 6);
public static final int keyEncipherment = (1 << 5);
public static final int dataEncipherment = (1 << 4);
public static final int keyAgreement = (1 << 3);
public static final int keyCertSign = (1 << 2);
public static final int cRLSign = (1 << 1);
public static final int encipherOnly = (1 << 0);
public static final int decipherOnly = (1 << 15);
public static DERBitString getInstance(Object obj) // needs to be DERBitString for other VMs
{
if (obj instanceof KeyUsage)
{
return (KeyUsage)obj;
}
if (obj instanceof X509Extension)
{
return new KeyUsage(DERBitString.getInstance(X509Extension.convertValueToObject((X509Extension)obj)));
}
return new KeyUsage(DERBitString.getInstance(obj));
}
/**
* Basic constructor.
*
* @param usage - the bitwise OR of the Key Usage flags giving the
* allowed uses for the key.
* e.g. (KeyUsage.keyEncipherment | KeyUsage.dataEncipherment)
*/
public KeyUsage(
int usage)
{
super(getBytes(usage), getPadBits(usage));
}
public KeyUsage(
DERBitString usage)
{
super(usage.getBytes(), usage.getPadBits());
}
public String toString()
{
if (data.length == 1)
{
return "KeyUsage: 0x" + Integer.toHexString(data[0] & 0xff);
}
return "KeyUsage: 0x" + Integer.toHexString((data[1] & 0xff) << 8 | (data[0] & 0xff));
}
}