1 files changed, 57 insertions, 0 deletions
diff --git a/libraries/spongycastle/prov/src/main/java/org/spongycastle/jce/X509KeyUsage.java b/libraries/spongycastle/prov/src/main/java/org/spongycastle/jce/X509KeyUsage.java
new file mode 100644
index 000000000..227670d6b
--- /dev/null
+++ b/libraries/spongycastle/prov/src/main/java/org/spongycastle/jce/X509KeyUsage.java
@@ -0,0 +1,57 @@
+package org.spongycastle.jce;
+
+import org.spongycastle.asn1.ASN1Object;
+import org.spongycastle.asn1.ASN1Primitive;
+import org.spongycastle.asn1.x509.KeyUsage;
+
+/**
+ * A holding class for constructing an X509 Key Usage extension.
+ *
+ * <pre>
+ *    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) }
+ * </pre>
+ */
+public class X509KeyUsage
+    extends ASN1Object
+{
+    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;
+
+    private int usage = 0;
+
+    /**
+     * Basic constructor.
+     * 
+     * @param usage - the bitwise OR of the Key Usage flags giving the
+     * allowed uses for the key.
+     * e.g. (X509KeyUsage.keyEncipherment | X509KeyUsage.dataEncipherment)
+     */
+    public X509KeyUsage(
+        int usage)
+    {
+        this.usage = usage;
+    }
+
+    public ASN1Primitive toASN1Primitive()
+    {
+        return new KeyUsage(usage).toASN1Primitive();
+    }
+}