diff options
| author | mark <mark@138bc75d-0d04-0410-961f-82ee72b054a4> | 2006-03-10 21:46:48 +0000 |
|---|---|---|
| committer | mark <mark@138bc75d-0d04-0410-961f-82ee72b054a4> | 2006-03-10 21:46:48 +0000 |
| commit | ce57ab760f69de6db452def7ffbf5b114a2d8694 (patch) | |
| tree | ea38c56431c5d4528fb54254c3f8e50f517bede3 /libjava/classpath/gnu/javax/crypto/pad/BasePad.java | |
| parent | 50996fe55769882de3f410896032c887f0ff0d04 (diff) | |
| download | ppe42-gcc-ce57ab760f69de6db452def7ffbf5b114a2d8694.tar.gz ppe42-gcc-ce57ab760f69de6db452def7ffbf5b114a2d8694.zip | |
Imported GNU Classpath 0.90
* scripts/makemake.tcl: Set gnu/java/awt/peer/swing to ignore.
* gnu/classpath/jdwp/VMFrame.java (SIZE): New constant.
* java/lang/VMCompiler.java: Use gnu.java.security.hash.MD5.
* java/lang/Math.java: New override file.
* java/lang/Character.java: Merged from Classpath.
(start, end): Now 'int's.
(canonicalName): New field.
(CANONICAL_NAME, NO_SPACES_NAME, CONSTANT_NAME): New constants.
(UnicodeBlock): Added argument.
(of): New overload.
(forName): New method.
Updated unicode blocks.
(sets): Updated.
* sources.am: Regenerated.
* Makefile.in: Likewise.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@111942 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'libjava/classpath/gnu/javax/crypto/pad/BasePad.java')
| -rw-r--r-- | libjava/classpath/gnu/javax/crypto/pad/BasePad.java | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/libjava/classpath/gnu/javax/crypto/pad/BasePad.java b/libjava/classpath/gnu/javax/crypto/pad/BasePad.java new file mode 100644 index 00000000000..49c5d050a85 --- /dev/null +++ b/libjava/classpath/gnu/javax/crypto/pad/BasePad.java @@ -0,0 +1,153 @@ +/* BasePad.java -- + Copyright (C) 2001, 2002, 2003, 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.pad; + +/** + * <p>An abstract class to facilitate implementing padding algorithms.</p> + */ +public abstract class BasePad implements IPad +{ + + // Constants and variables + // ------------------------------------------------------------------------- + + /** The canonical name prefix of the padding algorithm. */ + protected String name; + + /** The block size, in bytes, for this instance. */ + protected int blockSize; + + // Constructor(s) + // ------------------------------------------------------------------------- + + /** Trivial constructor for use by concrete subclasses. */ + protected BasePad(final String name) + { + super(); + + this.name = name; + blockSize = -1; + } + + // Class methods + // ------------------------------------------------------------------------- + + // Instance methods + // ------------------------------------------------------------------------- + + // IPad interface implementation ------------------------------------------- + + public String name() + { + final StringBuffer sb = new StringBuffer(name); + if (blockSize != -1) + { + sb.append('-').append(String.valueOf(8 * blockSize)); + } + return sb.toString(); + } + + public void init(final int bs) throws IllegalStateException + { + if (blockSize != -1) + { + throw new IllegalStateException(); + } + blockSize = bs; + setup(); + } + + public void reset() + { + blockSize = -1; + } + + public boolean selfTest() + { + byte[] padBytes; + final int offset = 5; + final int limit = 1024; + final byte[] in = new byte[limit]; + for (int bs = 2; bs < 256; bs++) + { + this.init(bs); + for (int i = 0; i < limit - offset - blockSize; i++) + { + padBytes = pad(in, offset, i); + if (((i + padBytes.length) % blockSize) != 0) + { + new RuntimeException(name()).printStackTrace(System.err); + return false; + } + + System.arraycopy(padBytes, 0, in, offset + i, padBytes.length); + try + { + if (padBytes.length != unpad(in, offset, i + padBytes.length)) + { + new RuntimeException(name()).printStackTrace(System.err); + return false; + } + } + catch (WrongPaddingException x) + { + x.printStackTrace(System.err); + return false; + } + } + this.reset(); + } + + return true; + } + + // abstract methods to implement by subclasses ----------------------------- + + /** + * <p>If any additional checks or resource setup must be done by the + * subclass, then this is the hook for it. This method will be called before + * the {@link #init(int)} method returns.</p> + */ + public abstract void setup(); + + public abstract byte[] pad(byte[] in, int off, int len); + + public abstract int unpad(byte[] in, int off, int len) + throws WrongPaddingException; +}
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