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authorupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
committerupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
commit554fd8c5195424bdbcabf5de30fdc183aba391bd (patch)
tree976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/gnu/javax/net/ssl/provider/Signature.java
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+/* Signature.java -- SSL Signature structure.
+ Copyright (C) 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.net.ssl.provider;
+
+import java.io.PrintWriter;
+import java.io.StringWriter;
+
+import java.nio.ByteBuffer;
+
+/**
+ * The signature structure.
+ *
+ * <pre>
+select (SignatureAlgorithm)
+{
+case anonymous:
+ struct { };
+case rsa:
+ digitally-signed struct
+ {
+ opaque md5_hash[16];
+ opaque sha_hash[20];
+ };
+case dsa:
+ digitally-signed struct
+ {
+ opaque sha_hash[20];
+ };
+} Signature;</pre>
+ */
+public class Signature implements Builder, Constructed
+{
+
+ // Fields.
+ // -------------------------------------------------------------------------
+
+ private final ByteBuffer buffer;
+ private final SignatureAlgorithm alg;
+
+ // Constructor.
+ // -------------------------------------------------------------------------
+
+ public Signature (final ByteBuffer buffer, final SignatureAlgorithm alg)
+ {
+ this.buffer = buffer;
+ this.alg = alg;
+ }
+
+ public Signature (final byte[] sigValue, final SignatureAlgorithm alg)
+ {
+ buffer = ByteBuffer.allocate(sigValue.length + 2);
+ buffer.putShort((short) sigValue.length);
+ buffer.put(sigValue);
+ buffer.position(0);
+ this.alg = alg;
+ }
+
+ // Instance methods.
+ // -------------------------------------------------------------------------
+
+ public int length ()
+ {
+ if (alg.equals (SignatureAlgorithm.ANONYMOUS))
+ return 0;
+ return (buffer.getShort (0) & 0xFFFF) + 2;
+ }
+
+ public ByteBuffer buffer()
+ {
+ return (ByteBuffer) buffer.duplicate().limit(length());
+ }
+
+ public byte[] signature ()
+ {
+ if (alg.equals (SignatureAlgorithm.ANONYMOUS))
+ return new byte[0];
+ int length = buffer.getShort (0) & 0xFFFF;
+ byte[] buf = new byte[length];
+ ((ByteBuffer) buffer.duplicate().position(2)).get(buf);
+ return buf;
+ }
+
+ public void setSignature (final byte[] signature)
+ {
+ setSignature (signature, 0, signature.length);
+ }
+
+ public void setSignature (final byte[] signature, final int offset, final int length)
+ {
+ if (alg.equals (SignatureAlgorithm.ANONYMOUS))
+ return;
+ buffer.putShort (0, (short) length);
+ buffer.position (2);
+ buffer.put (signature, offset, length);
+ }
+
+ public String toString ()
+ {
+ return toString (null);
+ }
+
+ public String toString (final String prefix)
+ {
+ StringWriter str = new StringWriter();
+ PrintWriter out = new PrintWriter(str);
+ if (prefix != null)
+ out.print (prefix);
+ out.println("struct {");
+ if (!alg.equals (SignatureAlgorithm.ANONYMOUS))
+ {
+ String subprefix = " ";
+ if (prefix != null)
+ subprefix = prefix + subprefix;
+ out.print (Util.hexDump (signature (), subprefix));
+ }
+ if (prefix != null)
+ out.print (prefix);
+ out.print ("} Signature;");
+ return str.toString();
+ }
+}