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Diffstat (limited to 'gnu/javax/net/ssl/provider/ClientHelloV2.java')
| -rw-r--r-- | gnu/javax/net/ssl/provider/ClientHelloV2.java | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/gnu/javax/net/ssl/provider/ClientHelloV2.java b/gnu/javax/net/ssl/provider/ClientHelloV2.java new file mode 100644 index 000000000..a514d9ad3 --- /dev/null +++ b/gnu/javax/net/ssl/provider/ClientHelloV2.java @@ -0,0 +1,158 @@ +/* ClientHelloV2.java -- a hello message from SSLv2. + 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; +import java.nio.ByteOrder; +import java.util.ArrayList; +import java.util.List; + +/** + * A client hello message from SSLv2. In SSLv3 and later, clients can + * send an SSLv2 client hello message, but set the protocol version + * for a later version. + * + * <p>The format of a version 2 client hello is: + * + * <pre> + char MSG-CLIENT-HELLO // equals 1 + char CLIENT-VERSION-MSB + char CLIENT-VERSION-LSB + char CIPHER-SPECS-LENGTH-MSB + char CIPHER-SPECS-LENGTH-LSB + char SESSION-ID-LENGTH-MSB + char SESSION-ID-LENGTH-LSB + char CHALLENGE-LENGTH-MSB + char CHALLENGE-LENGTH-LSB + char CIPHER-SPECS-DATA[(MSB<<8)|LSB] + char SESSION-ID-DATA[(MSB<<8)|LSB] + char CHALLENGE-DATA[(MSB<<8)|LSB]</pre> + */ +class ClientHelloV2 implements Constructed +{ + private final ByteBuffer buffer; + + ClientHelloV2 (final ByteBuffer buffer) + { + this.buffer = buffer.duplicate().order(ByteOrder.BIG_ENDIAN); + } + + public int length () + { + return 9 + cipherSpecsLength () + sessionIdLength () + challengeLength (); + } + + ProtocolVersion version () + { + return ProtocolVersion.getInstance (buffer.getShort (1)); + } + + int cipherSpecsLength () + { + return buffer.getShort (3) & 0xFFFF; + } + + int sessionIdLength () + { + return buffer.getShort (5) & 0xFFFF; + } + + int challengeLength () + { + return buffer.getShort (7) & 0xFFFF; + } + + public List<CipherSuite> cipherSpecs () + { + int n = cipherSpecsLength (); + List<CipherSuite> l = new ArrayList<CipherSuite>(n / 3); + ByteBuffer b = (ByteBuffer) buffer.duplicate ().position (9); + for (int i = 0; i < n; i += 3) + { + if (b.get () == 0) + l.add (CipherSuite.forValue(b.getShort()).resolve()); + else + b.getShort (); + } + return l; + } + + byte[] sessionId () + { + byte[] id = new byte[sessionIdLength ()]; + ((ByteBuffer) buffer.duplicate ().position (9 + cipherSpecsLength ())).get (id); + return id; + } + + byte[] challenge () + { + byte[] challenge = new byte[challengeLength ()]; + ((ByteBuffer) buffer.duplicate ().position (9 + cipherSpecsLength () + sessionIdLength ())).get (challenge); + return challenge; + } + + public String toString () + { + return toString (null); + } + + public String toString (String prefix) + { + StringWriter str = new StringWriter (); + PrintWriter out = new PrintWriter (str); + + if (prefix != null) out.print (prefix); + out.println ("CLIENT-HELLO-MSG"); + if (prefix != null) out.print (prefix); + out.print (" version: "); + out.println (version ()); + if (prefix != null) out.print (prefix); + out.println (" suites: "); + out.println (cipherSpecs ()); + if (prefix != null) out.print (prefix); + out.print (" sessionId: "); + out.println (Util.toHexString (sessionId (), ':')); + if (prefix != null) out.print (prefix); + out.print (" challenge: "); + out.println (Util.toHexString (challenge (), ':')); + return str.toString (); + } +}
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