aboutsummaryrefslogtreecommitdiffstats
path: root/gcc-4.4.3/libjava/classpath/gnu/javax/crypto/jce/key/SecretKeyGeneratorImpl.java
diff options
context:
space:
mode:
Diffstat (limited to 'gcc-4.4.3/libjava/classpath/gnu/javax/crypto/jce/key/SecretKeyGeneratorImpl.java')
-rw-r--r--gcc-4.4.3/libjava/classpath/gnu/javax/crypto/jce/key/SecretKeyGeneratorImpl.java111
1 files changed, 111 insertions, 0 deletions
diff --git a/gcc-4.4.3/libjava/classpath/gnu/javax/crypto/jce/key/SecretKeyGeneratorImpl.java b/gcc-4.4.3/libjava/classpath/gnu/javax/crypto/jce/key/SecretKeyGeneratorImpl.java
new file mode 100644
index 000000000..257c0a243
--- /dev/null
+++ b/gcc-4.4.3/libjava/classpath/gnu/javax/crypto/jce/key/SecretKeyGeneratorImpl.java
@@ -0,0 +1,111 @@
+/* SecretKeyGeneratorImpl.java -- symmetric key pair generator.
+ Copyright (C) 2004, 2006 Free Software Foundation, Inc.
+
+This file is a 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 of the License, 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; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
+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 gnu.javax.crypto.jce.key;
+
+import gnu.javax.crypto.cipher.CipherFactory;
+import gnu.javax.crypto.cipher.IBlockCipher;
+
+import java.security.InvalidAlgorithmParameterException;
+import java.security.InvalidParameterException;
+import java.security.SecureRandom;
+import java.security.spec.AlgorithmParameterSpec;
+
+import java.util.Iterator;
+import java.util.LinkedList;
+import java.util.List;
+
+import javax.crypto.KeyGeneratorSpi;
+import javax.crypto.SecretKey;
+import javax.crypto.spec.SecretKeySpec;
+
+public class SecretKeyGeneratorImpl
+ extends KeyGeneratorSpi
+{
+ protected final int defaultKeySize;
+ protected final List keySizes;
+ protected final String algorithm;
+ protected boolean init;
+ protected int currentKeySize;
+ protected SecureRandom random;
+
+ protected SecretKeyGeneratorImpl(final String algorithm)
+ {
+ this.algorithm = algorithm;
+ IBlockCipher cipher = CipherFactory.getInstance(algorithm);
+ if (cipher == null)
+ throw new IllegalArgumentException("no such cipher: " + algorithm);
+ defaultKeySize = cipher.defaultKeySize();
+ keySizes = new LinkedList();
+ for (Iterator it = cipher.keySizes(); it.hasNext();)
+ keySizes.add(it.next());
+ init = false;
+ }
+
+ protected SecretKey engineGenerateKey()
+ {
+ if (! init)
+ throw new IllegalStateException("not initialized");
+ byte[] buf = new byte[currentKeySize];
+ random.nextBytes(buf);
+ return new SecretKeySpec(buf, algorithm);
+ }
+
+ protected void engineInit(AlgorithmParameterSpec params, SecureRandom random)
+ throws InvalidAlgorithmParameterException
+ {
+ throw new InvalidAlgorithmParameterException(
+ algorithm + " does not support algorithm paramaters");
+ }
+
+ protected void engineInit(int keySize, SecureRandom random)
+ {
+ keySize >>>= 3; // Use bytes.
+ if (! keySizes.contains(Integer.valueOf(keySize)))
+ throw new InvalidParameterException("unsupported key size: " + keySize
+ + ", valid sizes are: " + keySizes);
+ currentKeySize = keySize;
+ this.random = random;
+ init = true;
+ }
+
+ protected void engineInit(SecureRandom random)
+ {
+ engineInit(defaultKeySize << 3, random);
+ }
+}