1 files changed, 284 insertions, 0 deletions
diff --git a/libjava/javax/crypto/EncryptedPrivateKeyInfo.java b/libjava/javax/crypto/EncryptedPrivateKeyInfo.java
new file mode 100644
index 00000000000..b64fbd6af5c
--- /dev/null
+++ b/libjava/javax/crypto/EncryptedPrivateKeyInfo.java
@@ -0,0 +1,284 @@
+/* EncryptedPrivateKeyInfo.java -- As in PKCS #8.
+   Copyright (C) 2004  Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath 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; either version 2, or (at your option)
+any later version.
+
+GNU Classpath 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 GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+02111-1307 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package javax.crypto;
+
+import gnu.java.security.OID;
+import gnu.java.security.der.DER;
+import gnu.java.security.der.DERReader;
+import gnu.java.security.der.DERValue;
+
+import java.io.IOException;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import java.security.AlgorithmParameters;
+import java.security.NoSuchAlgorithmException;
+import java.security.spec.InvalidKeySpecException;
+import java.security.spec.PKCS8EncodedKeySpec;
+
+/**
+ * An implementation of the <code>EncryptedPrivateKeyInfo</code> ASN.1
+ * type as specified in <a
+ * href="http://www.rsasecurity.com/rsalabs/pkcs/pkcs-8/">PKCS #8 -
+ * Private-Key Information Syntax Standard</a>.
+ *
+ * <p>The ASN.1 type <code>EncryptedPrivateKeyInfo</code> is:
+ *
+ * <blockquote>
+ * <pre>EncryptedPrivateKeyInfo ::= SEQUENCE {
+ *   encryptionAlgorithm EncryptionAlgorithmIdentifier,
+ *   encryptedData EncryptedData }
+ *
+ * EncryptionAlgorithmIdentifier ::= AlgorithmIdentifier
+ *
+ * EncrytpedData ::= OCTET STRING
+ *
+ * AlgorithmIdentifier ::= SEQUENCE {
+ *   algorithm  OBJECT IDENTIFIER,
+ *   parameters ANY DEFINED BY algorithm OPTIONAL }</pre>
+ * </blockquote>
+ *
+ * @author Casey Marshall (csm@gnu.org)
+ * @since 1.4
+ * @see java.security.spec.PKCS8EncodedKeySpec
+ */
+public class EncryptedPrivateKeyInfo
+{
+
+  // Fields.
+  // ------------------------------------------------------------------------
+
+  /** The encrypted data. */
+  private byte[] encryptedData;
+
+  /** The encoded, encrypted key. */
+  private byte[] encoded;
+
+  /** The OID of the encryption algorithm. */
+  private OID algOid;
+
+  /** The encryption algorithm's parameters. */
+  private AlgorithmParameters params;
+
+  /** The encoded ASN.1 algorithm parameters. */
+  private byte[] encodedParams;
+
+  // Constructors.
+  // ------------------------------------------------------------------------
+
+  /**
+   * Create a new <code>EncryptedPrivateKeyInfo</code> object from raw
+   * encrypted data and the parameters used for encryption.
+   *
+   * <p>The <code>encryptedData</code> array is cloned.
+   *
+   * @param params        The encryption algorithm parameters.
+   * @param encryptedData The encrypted key data.
+   * @throws java.lang.IllegalArgumentException If the
+   *         <code>encryptedData</code> array is empty (zero-length).
+   * @throws java.security.NoSuchAlgorithmException If the algorithm
+   *         specified in the parameters is not supported.
+   * @throws java.lang.NullPointerException If <code>encryptedData</code>
+   *         is null.
+   */
+  public EncryptedPrivateKeyInfo(AlgorithmParameters params,
+                                 byte[] encryptedData)
+    throws IllegalArgumentException, NoSuchAlgorithmException
+  {
+    if (encryptedData.length == 0)
+      {
+        throw new IllegalArgumentException("0-length encryptedData");
+      }
+    this.params = params;
+    algOid = new OID(params.getAlgorithm());
+    this.encryptedData = (byte[]) encryptedData.clone();
+  }
+
+  /**
+   * Create a new <code>EncryptedPrivateKeyInfo</code> from an encoded
+   * representation, parsing the ASN.1 sequence.
+   *
+   * @param encoded The encoded info.
+   * @throws java.io.IOException If parsing the encoded data fails.
+   * @throws java.lang.NullPointerException If <code>encoded</code> is
+   *         null.
+   */
+  public EncryptedPrivateKeyInfo(byte[] encoded)
+    throws IOException
+  {
+    this.encoded = (byte[]) encoded.clone();
+    decode();
+  }
+
+  /**
+   * Create a new <code>EncryptedPrivateKeyInfo</code> from the cipher
+   * name and the encrytpedData.
+   *
+   * <p>The <code>encryptedData</code> array is cloned.
+   *
+   * @param algName       The name of the algorithm (as an object identifier).
+   * @param encryptedData The encrypted key data.
+   * @throws java.lang.IllegalArgumentException If the
+   *         <code>encryptedData</code> array is empty (zero-length).
+   * @throws java.security.NoSuchAlgorithmException If algName is not
+   *         the name of a supported algorithm.
+   * @throws java.lang.NullPointerException If <code>encryptedData</code>
+   *         is null.
+   */
+  public EncryptedPrivateKeyInfo(String algName, byte[] encryptedData)
+    throws IllegalArgumentException, NoSuchAlgorithmException,
+           NullPointerException
+  {
+    if (encryptedData.length == 0)
+      {
+        throw new IllegalArgumentException("0-length encryptedData");
+      }
+    this.algOid = new OID(algName);
+    this.encryptedData = (byte[]) encryptedData.clone();
+  }
+
+  // Instance methods.
+  // ------------------------------------------------------------------------
+
+  /**
+   * Return the name of the cipher used to encrypt this key.
+   *
+   * @return The algorithm name.
+   */
+  public String getAlgName()
+  {
+    return algOid.toString();
+  }
+
+  public AlgorithmParameters getAlgParameters()
+  {
+    if (params == null && encodedParams != null)
+      {
+        try
+          {
+            params = AlgorithmParameters.getInstance(getAlgName());
+            params.init(encodedParams);
+          }
+        catch (NoSuchAlgorithmException ignore)
+          {
+          }
+        catch (IOException ignore)
+          {
+          }
+      }
+    return params;
+  }
+
+  public synchronized byte[] getEncoded() throws IOException
+  {
+    if (encoded == null) encode();
+    return (byte[]) encoded.clone();
+  }
+
+  public byte[] getEncryptedData()
+  {
+    return encryptedData;
+  }
+
+  public PKCS8EncodedKeySpec getKeySpec(Cipher cipher)
+    throws InvalidKeySpecException
+  {
+    try
+      {
+        return new PKCS8EncodedKeySpec(cipher.doFinal(encryptedData));
+      }
+    catch (Exception x)
+      {
+        throw new InvalidKeySpecException(x.toString());
+      }
+  }
+
+  // Own methods.
+  // -------------------------------------------------------------------------
+
+  private void decode() throws IOException
+  {
+    DERReader der = new DERReader(encoded);
+    DERValue val = der.read();
+    if (val.getTag() != DER.SEQUENCE)
+      throw new IOException("malformed EncryptedPrivateKeyInfo");
+    val = der.read();
+    if (val.getTag() != DER.SEQUENCE)
+      throw new IOException("malformed AlgorithmIdentifier");
+    int algpLen = val.getLength();
+    DERValue oid = der.read();
+    if (oid.getTag() != DER.OBJECT_IDENTIFIER)
+      throw new IOException("malformed AlgorithmIdentifier");
+    algOid = (OID) oid.getValue();
+    if (algpLen == 0)
+      {
+        val = der.read();
+        if (val.getTag() != 0)
+          {
+            encodedParams = val.getEncoded();
+            der.read();
+          }
+      }
+    else if (oid.getEncodedLength() < val.getLength())
+      {
+        val = der.read();
+        encodedParams = val.getEncoded();
+      }
+    val = der.read();
+    if (val.getTag() != DER.OCTET_STRING)
+      throw new IOException("malformed AlgorithmIdentifier");
+    encryptedData = (byte[]) val.getValue();
+  }
+
+  private void encode() throws IOException
+  {
+    List algId = new ArrayList(2);
+    algId.add(new DERValue(DER.OBJECT_IDENTIFIER, algOid));
+    getAlgParameters();
+    if (params != null)
+      {
+        algId.add(DERReader.read(params.getEncoded()));
+      }
+    List epki = new ArrayList(2);
+    epki.add(new DERValue(DER.CONSTRUCTED|DER.SEQUENCE, algId));
+    epki.add(new DERValue(DER.OCTET_STRING, encryptedData));
+    encoded = new DERValue(DER.CONSTRUCTED|DER.SEQUENCE, epki).getEncoded();
+  }
+}