mirror of git://gcc.gnu.org/git/gcc.git
289 lines
8.2 KiB
Java
289 lines
8.2 KiB
Java
/* Alert.java -- SSL Alert message.
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Copyright (C) 2006 Free Software Foundation, Inc.
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This file is a part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or (at
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your option) any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
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USA
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package gnu.javax.net.ssl.provider;
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import java.io.PrintWriter;
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import java.io.StringWriter;
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import java.nio.ByteBuffer;
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/**
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* An alert message in the SSL protocol. Alerts are sent both as warnings
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* which may allow execution to continue, or they may be fatal, which will
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* halt this session. An alert object is composed of two enums -- the level,
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* which indicates the seriousness of the alert, and the description, which
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* indicates the reason for the alert.
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*
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* <pre>
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* struct {
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* AlertLevel level;
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* AlertDescription description;
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* }
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* </pre>
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*/
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public final class Alert implements Constructed
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{
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// Fields.
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// -------------------------------------------------------------------------
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/** The underlying byte buffer. */
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private final ByteBuffer buffer;
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// Constructor.
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// -------------------------------------------------------------------------
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public Alert (final ByteBuffer buffer)
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{
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this.buffer = buffer;
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}
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public Alert (final Level level, final Description description)
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{
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level.getClass ();
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description.getClass ();
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ByteBuffer b = ByteBuffer.allocate (2);
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b.put (0, (byte) level.getValue ());
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b.put (1, (byte) description.getValue ());
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this.buffer = b.asReadOnlyBuffer ();
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}
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// Instance methods.
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// -------------------------------------------------------------------------
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public int length ()
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{
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return 2;
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}
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byte[] getEncoded()
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{
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byte[] buf = new byte[2];
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buffer.position (0);
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buffer.get (buf);
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return buf;
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}
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public Level level()
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{
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return Level.forInteger (buffer.get (0) & 0xFF);
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}
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public Description description()
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{
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return Description.forInteger (buffer.get (1) & 0xFF);
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}
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public void setLevel (final Level level)
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{
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buffer.put (0, (byte) level.getValue ());
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}
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public void setDescription (final Description description)
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{
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buffer.put (1, (byte) description.getValue ());
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}
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public boolean equals (Object o)
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{
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if (!(o instanceof Alert))
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return false;
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Alert that = (Alert) o;
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return that.buffer.position (0).equals (buffer.position (0));
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}
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public int hashCode ()
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{
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return buffer.getShort (0) & 0xFFFF;
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}
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public String toString()
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{
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return toString (null);
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}
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public String toString (final String prefix)
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{
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StringWriter str = new StringWriter ();
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PrintWriter out = new PrintWriter (str);
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if (prefix != null) out.print (prefix);
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out.println ("struct {");
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if (prefix != null) out.print (prefix);
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out.print (" level: ");
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out.print (level ());
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out.println (";");
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if (prefix != null) out.print (prefix);
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out.print (" description: ");
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out.print (description ());
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out.println (";");
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if (prefix != null) out.print (prefix);
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out.print ("} Alert;");
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return str.toString ();
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}
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// Enumerations.
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// -------------------------------------------------------------------------
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/**
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* The level enumeration.
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*
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* <pre>
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* enum { warning(1), fatal(2), (255) } AlertLevel;
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* </pre>
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*/
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public static enum Level
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{
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WARNING (1), FATAL (2);
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private final int value;
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private Level(int value)
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{
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this.value = value;
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}
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public static Level forInteger (final int value)
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{
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switch (value & 0xFF)
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{
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case 1: return WARNING;
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case 2: return FATAL;
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default: throw new IllegalArgumentException ("invalid alert level: " + value);
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}
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}
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public int getValue()
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{
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return value;
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}
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}
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/**
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* The description enumeration.
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*/
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public static enum Description
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{
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CLOSE_NOTIFY ( 0),
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UNEXPECTED_MESSAGE ( 10),
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BAD_RECORD_MAC ( 20),
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DECRYPTION_FAILED ( 21),
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RECORD_OVERFLOW ( 22),
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DECOMPRESSION_FAILURE ( 30),
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HANDSHAKE_FAILURE ( 40),
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NO_CERTIFICATE ( 41),
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BAD_CERTIFICATE ( 42),
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UNSUPPORTED_CERTIFICATE ( 43),
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CERTIFICATE_REVOKED ( 44),
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CERTIFICATE_EXPIRED ( 45),
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CERTIFICATE_UNKNOWN ( 46),
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ILLEGAL_PARAMETER ( 47),
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UNKNOWN_CA ( 48),
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ACCESS_DENIED ( 49),
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DECODE_ERROR ( 50),
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DECRYPT_ERROR ( 51),
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EXPORT_RESTRICTION ( 60),
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PROTOCOL_VERSION ( 70),
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INSUFFICIENT_SECURITY ( 71),
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INTERNAL_ERROR ( 80),
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USER_CANCELED ( 90),
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NO_RENEGOTIATION (100),
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UNSUPPORTED_EXTENSION (110),
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CERTIFICATE_UNOBTAINABLE (111),
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UNRECOGNIZED_NAME (112),
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BAD_CERTIFICATE_STATUS_RESPONSE (113),
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BAD_CERTIFICATE_HASH_VALUE (114),
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UNKNOWN_SRP_USERNAME (120),
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MISSING_SRP_USERNAME (121);
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private final int value;
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private Description(int value)
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{
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this.value = value;
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}
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/**
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* Return an alert description object based on the specified integer
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* value.
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*
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* @param value The raw description value.
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* @return The appropriate description object.
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*/
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public static Description forInteger (final int value)
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{
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switch (value & 0xFF)
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{
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case 0: return CLOSE_NOTIFY;
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case 10: return UNEXPECTED_MESSAGE;
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case 20: return BAD_RECORD_MAC;
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case 21: return DECRYPTION_FAILED;
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case 22: return RECORD_OVERFLOW;
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case 30: return DECOMPRESSION_FAILURE;
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case 40: return HANDSHAKE_FAILURE;
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case 41: return NO_CERTIFICATE;
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case 42: return BAD_CERTIFICATE;
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case 43: return UNSUPPORTED_CERTIFICATE;
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case 44: return CERTIFICATE_REVOKED;
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case 45: return CERTIFICATE_EXPIRED;
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case 46: return CERTIFICATE_UNKNOWN;
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case 47: return ILLEGAL_PARAMETER;
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case 48: return UNKNOWN_CA;
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case 49: return ACCESS_DENIED;
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case 50: return DECODE_ERROR;
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case 51: return DECRYPT_ERROR;
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case 60: return EXPORT_RESTRICTION;
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case 70: return PROTOCOL_VERSION;
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case 71: return INSUFFICIENT_SECURITY;
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case 80: return INTERNAL_ERROR;
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case 90: return USER_CANCELED;
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case 100: return NO_RENEGOTIATION;
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case 120: return UNKNOWN_SRP_USERNAME;
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case 121: return MISSING_SRP_USERNAME;
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default: throw new IllegalArgumentException("unknown alert description: " + value);
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}
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}
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public int getValue()
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{
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return value;
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}
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}
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}
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