1 files changed, 133 insertions, 0 deletions
diff --git a/base/util/src/netscape/security/provider/DSAPublicKey.java b/base/util/src/netscape/security/provider/DSAPublicKey.java
new file mode 100644
index 000000000..89262809b
--- /dev/null
+++ b/base/util/src/netscape/security/provider/DSAPublicKey.java
@@ -0,0 +1,133 @@
+// --- BEGIN COPYRIGHT BLOCK ---
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; version 2 of the License.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with this program; if not, write to the Free Software Foundation, Inc.,
+// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+//
+// (C) 2007 Red Hat, Inc.
+// All rights reserved.
+// --- END COPYRIGHT BLOCK ---
+package netscape.security.provider;
+
+import java.io.IOException;
+import java.io.Serializable;
+import java.math.BigInteger;
+import java.security.AlgorithmParameters;
+import java.security.InvalidKeyException;
+import java.security.interfaces.DSAParams;
+import java.security.spec.DSAParameterSpec;
+import java.security.spec.InvalidParameterSpecException;
+
+import netscape.security.util.BigInt;
+import netscape.security.util.DerInputStream;
+import netscape.security.util.DerValue;
+import netscape.security.x509.AlgIdDSA;
+import netscape.security.x509.X509Key;
+
+/**
+ * An X.509 public key for the Digital Signature Algorithm.
+ * 
+ * @author Benjamin Renaud
+ * 
+ * @version 1.52, 97/12/10
+ * 
+ * @see DSAPrivateKey
+ * @see AlgIdDSA
+ * @see DSA
+ */
+
+public final class DSAPublicKey extends X509Key
+        implements java.security.interfaces.DSAPublicKey, Serializable {
+
+    /** use serialVersionUID from JDK 1.1. for interoperability */
+    private static final long serialVersionUID = -2994193307391104133L;
+
+    /* the public key */
+    private BigInteger y;
+
+    /*
+     * Keep this constructor for backwards compatibility with JDK1.1. 
+     */
+    public DSAPublicKey() {
+    }
+
+    /**
+     * Make a DSA public key out of a public key and three parameters.
+     */
+    public DSAPublicKey(BigInteger y, BigInteger p, BigInteger q,
+            BigInteger g)
+            throws InvalidKeyException {
+        this.y = y;
+        algid = new AlgIdDSA(p, q, g);
+
+        try {
+            key = new DerValue(DerValue.tag_Integer,
+                    y.toByteArray()).toByteArray();
+            encode();
+        } catch (IOException e) {
+            throw new InvalidKeyException("could not DER encode y: " +
+                      e.getMessage());
+        }
+    }
+
+    /**
+     * Make a DSA public key from its DER encoding (X.509).
+     */
+    public DSAPublicKey(byte[] encoded) throws InvalidKeyException {
+        decode(encoded);
+    }
+
+    /**
+     * Returns the DSA parameters associated with this key, or null if the
+     * parameters could not be parsed.
+     */
+    public DSAParams getParams() {
+        try {
+            if (algid instanceof DSAParams) {
+                return (DSAParams) algid;
+            } else {
+                DSAParameterSpec paramSpec;
+                AlgorithmParameters algParams = algid.getParameters();
+                if (algParams == null) {
+                    return null;
+                }
+                paramSpec = (DSAParameterSpec) algParams.getParameterSpec
+                        (DSAParameterSpec.class);
+                return (DSAParams) paramSpec;
+            }
+        } catch (InvalidParameterSpecException e) {
+            return null;
+        }
+    }
+
+    /**
+     * Get the raw public value, y, without the parameters.
+     * 
+     */
+    public BigInteger getY() {
+        return y;
+    }
+
+    public String toString() {
+        return "Sun DSA Public Key\n    Parameters:" + algid
+                + "\n  y:\n" + (new BigInt(y)).toString() + "\n";
+    }
+
+    protected void parseKeyBits() throws InvalidKeyException {
+        try {
+            DerInputStream in = new DerInputStream(key);
+            y = in.getInteger().toBigInteger();
+        } catch (IOException e) {
+            throw new InvalidKeyException("Invalid key: y value\n" +
+                      e.getMessage());
+        }
+    }
+}