2002/03/21 01:19:32

[org.ibex.core.git] / src / org / bouncycastle / asn1 / x509 / SubjectKeyIdentifier.java

diff --git a/src/org/bouncycastle/asn1/x509/SubjectKeyIdentifier.java b/src/org/bouncycastle/asn1/x509/SubjectKeyIdentifier.java
new file mode 100644 (file)
index 0000000..0dd2b27
--- /dev/null
+++ b/src/org/bouncycastle/asn1/x509/SubjectKeyIdentifier.java
@@ -0,0 +1,64 @@
+package org.bouncycastle.asn1.x509;
+
+import org.bouncycastle.crypto.Digest;
+import org.bouncycastle.crypto.digests.SHA1Digest;
+import org.bouncycastle.asn1.*;
+
+/**
+ * <pre>
+ * SubjectKeyIdentifier::= OCTET STRING
+ * </pre>
+ */
+public class SubjectKeyIdentifier
+    implements DEREncodable
+{
+       private byte[] keyidentifier;
+
+    public SubjectKeyIdentifier(
+        byte[] keyid)
+    {
+        this.keyidentifier=keyid;
+    }
+
+    public SubjectKeyIdentifier(
+        DEROctetString  keyid)
+    {
+               this.keyidentifier=keyid.getOctets();
+
+    }
+
+       /**
+        *
+        * Calulates the keyidentifier using a SHA1 hash over the BIT STRING
+        * from SubjectPublicKeyInfo as defined in RFC2459.
+        *
+        **/
+       public SubjectKeyIdentifier(
+               SubjectPublicKeyInfo    spki)
+       {
+               Digest  digest = new SHA1Digest();
+               byte[]  resBuf = new byte[digest.getDigestSize()];
+
+               DERBitString derpk = new DERBitString(spki.getPublicKey());
+               byte[] bytes = derpk.getBytes();
+               digest.update(bytes, 0, bytes.length);
+               digest.doFinal(resBuf, 0);
+               this.keyidentifier=resBuf;
+       }
+
+    public byte[] getKeyIdentifier()
+    {
+        return keyidentifier;
+    }
+
+     /**
+     * <pre>
+     * SubjectKeyIdentifier := OCTET STRING
+     * </pre>
+     */
+    public DERObject getDERObject()
+    {
+        DEROctetString oct = new DEROctetString(keyidentifier);
+        return oct;
+    }
+}