1 files changed, 63 insertions, 4 deletions

diff --git a/libjava/gnu/java/security/provider/GnuDSAPrivateKey.java b/libjava/gnu/java/security/provider/GnuDSAPrivateKey.java
index 4eceb00..e82483c 100644
--- a/libjava/gnu/java/security/provider/GnuDSAPrivateKey.java
+++ b/libjava/gnu/java/security/provider/GnuDSAPrivateKey.java
@@ -1,5 +1,5 @@
 /* GnuDSAPrivateKey.java --- Gnu DSA Private Key
-   Copyright (C) 1999 Free Software Foundation, Inc.
+   Copyright (C) 1999,2003,2004  Free Software Foundation, Inc.
 
 This file is part of GNU Classpath.
 
@@ -38,13 +38,25 @@ exception statement from your version. */
 
 package gnu.java.security.provider;
 
+import gnu.java.security.OID;
+import gnu.java.security.der.DER;
+import gnu.java.security.der.DERValue;
+import gnu.java.security.der.DERWriter;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+
 import java.math.BigInteger;
+
 import java.security.interfaces.DSAPrivateKey;
 import java.security.interfaces.DSAParams;
 import java.security.spec.DSAParameterSpec;
 
+import java.util.ArrayList;
+
 public class GnuDSAPrivateKey implements DSAPrivateKey
 {
+  private byte[] encodedKey;
   BigInteger x;
   BigInteger p;
   BigInteger q;
@@ -65,13 +77,57 @@ public class GnuDSAPrivateKey implements DSAPrivateKey
 
   public String getFormat()
   {
-    return null;
+    return "PKCS#8";
   }
 
+  /**
+   * Encodes this key as a <code>PrivateKeyInfo</code>, as described in
+   * PKCS #8. The ASN.1 specification for this structure is:
+   *
+   * <blockquote><pre>
+   * PrivateKeyInfo ::= SEQUENCE {
+   *   version Version,
+   *   privateKeyAlgorithm PrivateKeyAlgorithmIdentifier,
+   *   privateKey PrivateKey,
+   *   attributes [0] IMPLICIT Attributes OPTIONAL }
+   *
+   * Version ::= INTEGER
+   *
+   * PrivateKeyAlgorithmIdentifier ::= AlgorithmIdentifier
+   *
+   * PrivateKey ::= OCTET STRING
+   *
+   * Attributes ::= SET OF Attribute
+   * </pre></blockquote>
+   *
+   * <p>DSA private keys (in Classpath at least) have no attributes.
+   */
   public byte[] getEncoded()
   {
+    if (encodedKey != null)
+      return (byte[]) encodedKey.clone();
+    try
+      {
+        ByteArrayOutputStream out = new ByteArrayOutputStream();
+        ArrayList pki = new ArrayList(3);
+        pki.add(new DERValue(DER.INTEGER, BigInteger.ZERO));
+        ArrayList algId = new ArrayList(2);
+        algId.add(new DERValue(DER.OBJECT_IDENTIFIER,
+                  new OID("1.2.840.10040.4.1")));
+        ArrayList algParams = new ArrayList(3);
+        algParams.add(new DERValue(DER.INTEGER, p));
+        algParams.add(new DERValue(DER.INTEGER, q));
+        algParams.add(new DERValue(DER.INTEGER, g));
+        algId.add(new DERValue(DER.CONSTRUCTED|DER.SEQUENCE, algParams));
+        pki.add(new DERValue(DER.OCTET_STRING, x.toByteArray()));
+        DERWriter.write(out, new DERValue(DER.CONSTRUCTED|DER.SEQUENCE, pki));
+        return (byte[]) (encodedKey = out.toByteArray()).clone();
+      }
+    catch (IOException ioe)
+      {
     return null;
   }
+  }
 
   public DSAParams getParams()
   {
@@ -85,7 +141,10 @@ public class GnuDSAPrivateKey implements DSAPrivateKey
 
   public String toString()
   {
-    return "GnuDSAPrivateKey: x=" + x.toString(16) + " p=" + p.toString(16)
-      + " q=" + q.toString(16) + " g=" + g.toString(16);
+    return "GnuDSAPrivateKey: x="
+      + (x != null ? x.toString(16) : "null") + " p="
+      + (p != null ? p.toString(16) : "null") + " q="
+      + (q != null ? q.toString(16) : "null") + " g="
+      + (g != null ? g.toString(16) : "null");
   }
 }