X-Git-Url: https://code.wpia.club/?a=blobdiff_plain;f=lib%2Fopenssl%2Futil%2FTLSProxy%2FClientHello.pm;fp=lib%2Fopenssl%2Futil%2FTLSProxy%2FClientHello.pm;h=ec739d2970a107ee8057f6fc8b31ffd6bdfb2ad0;hb=02ed66432c92de70694700164f986190aad3cbc5;hp=0000000000000000000000000000000000000000;hpb=89016837dcbf2775cd15dc8cbaba00dc6379f86e;p=cassiopeia.git

diff --git a/lib/openssl/util/TLSProxy/ClientHello.pm b/lib/openssl/util/TLSProxy/ClientHello.pm
new file mode 100644
index 0000000..ec739d2
--- /dev/null
+++ b/lib/openssl/util/TLSProxy/ClientHello.pm
@@ -0,0 +1,242 @@
+# Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.
+#
+# Licensed under the OpenSSL license (the "License").  You may not use
+# this file except in compliance with the License.  You can obtain a copy
+# in the file LICENSE in the source distribution or at
+# https://www.openssl.org/source/license.html
+
+use strict;
+
+package TLSProxy::ClientHello;
+
+use vars '@ISA';
+push @ISA, 'TLSProxy::Message';
+
+sub new
+{
+    my $class = shift;
+    my ($server,
+        $data,
+        $records,
+        $startoffset,
+        $message_frag_lens) = @_;
+
+    my $self = $class->SUPER::new(
+        $server,
+        1,
+        $data,
+        $records,
+        $startoffset,
+        $message_frag_lens);
+
+    $self->{client_version} = 0;
+    $self->{random} = [];
+    $self->{session_id_len} = 0;
+    $self->{session} = "";
+    $self->{ciphersuite_len} = 0;
+    $self->{ciphersuites} = [];
+    $self->{comp_meth_len} = 0;
+    $self->{comp_meths} = [];
+    $self->{extensions_len} = 0;
+    $self->{extension_data} = "";
+
+    return $self;
+}
+
+sub parse
+{
+    my $self = shift;
+    my $ptr = 2;
+    my ($client_version) = unpack('n', $self->data);
+    my $random = substr($self->data, $ptr, 32);
+    $ptr += 32;
+    my $session_id_len = unpack('C', substr($self->data, $ptr));
+    $ptr++;
+    my $session = substr($self->data, $ptr, $session_id_len);
+    $ptr += $session_id_len;
+    my $ciphersuite_len = unpack('n', substr($self->data, $ptr));
+    $ptr += 2;
+    my @ciphersuites = unpack('n*', substr($self->data, $ptr,
+                                           $ciphersuite_len));
+    $ptr += $ciphersuite_len;
+    my $comp_meth_len = unpack('C', substr($self->data, $ptr));
+    $ptr++;
+    my @comp_meths = unpack('C*', substr($self->data, $ptr, $comp_meth_len));
+    $ptr += $comp_meth_len;
+    my $extensions_len = unpack('n', substr($self->data, $ptr));
+    $ptr += 2;
+    #For now we just deal with this as a block of data. In the future we will
+    #want to parse this
+    my $extension_data = substr($self->data, $ptr);
+
+    if (length($extension_data) != $extensions_len) {
+        die "Invalid extension length\n";
+    }
+    my %extensions = ();
+    while (length($extension_data) >= 4) {
+        my ($type, $size) = unpack("nn", $extension_data);
+        my $extdata = substr($extension_data, 4, $size);
+        $extension_data = substr($extension_data, 4 + $size);
+        $extensions{$type} = $extdata;
+    }
+
+    $self->client_version($client_version);
+    $self->random($random);
+    $self->session_id_len($session_id_len);
+    $self->session($session);
+    $self->ciphersuite_len($ciphersuite_len);
+    $self->ciphersuites(\@ciphersuites);
+    $self->comp_meth_len($comp_meth_len);
+    $self->comp_meths(\@comp_meths);
+    $self->extensions_len($extensions_len);
+    $self->extension_data(\%extensions);
+
+    $self->process_extensions();
+
+    print "    Client Version:".$client_version."\n";
+    print "    Session ID Len:".$session_id_len."\n";
+    print "    Ciphersuite len:".$ciphersuite_len."\n";
+    print "    Compression Method Len:".$comp_meth_len."\n";
+    print "    Extensions Len:".$extensions_len."\n";
+}
+
+#Perform any actions necessary based on the extensions we've seen
+sub process_extensions
+{
+    my $self = shift;
+    my %extensions = %{$self->extension_data};
+
+    #Clear any state from a previous run
+    TLSProxy::Record->etm(0);
+
+    if (exists $extensions{TLSProxy::Message::EXT_ENCRYPT_THEN_MAC}) {
+        TLSProxy::Record->etm(1);
+    }
+}
+
+#Reconstruct the on-the-wire message data following changes
+sub set_message_contents
+{
+    my $self = shift;
+    my $data;
+    my $extensions = "";
+
+    $data = pack('n', $self->client_version);
+    $data .= $self->random;
+    $data .= pack('C', $self->session_id_len);
+    $data .= $self->session;
+    $data .= pack('n', $self->ciphersuite_len);
+    $data .= pack("n*", @{$self->ciphersuites});
+    $data .= pack('C', $self->comp_meth_len);
+    $data .= pack("C*", @{$self->comp_meths});
+
+    foreach my $key (keys %{$self->extension_data}) {
+        my $extdata = ${$self->extension_data}{$key};
+        $extensions .= pack("n", $key);
+        $extensions .= pack("n", length($extdata));
+        $extensions .= $extdata;
+        if ($key == TLSProxy::Message::EXT_DUPLICATE_EXTENSION) {
+          $extensions .= pack("n", $key);
+          $extensions .= pack("n", length($extdata));
+          $extensions .= $extdata;
+        }
+    }
+
+    $data .= pack('n', length($extensions));
+    $data .= $extensions;
+
+    $self->data($data);
+}
+
+#Read/write accessors
+sub client_version
+{
+    my $self = shift;
+    if (@_) {
+      $self->{client_version} = shift;
+    }
+    return $self->{client_version};
+}
+sub random
+{
+    my $self = shift;
+    if (@_) {
+      $self->{random} = shift;
+    }
+    return $self->{random};
+}
+sub session_id_len
+{
+    my $self = shift;
+    if (@_) {
+      $self->{session_id_len} = shift;
+    }
+    return $self->{session_id_len};
+}
+sub session
+{
+    my $self = shift;
+    if (@_) {
+      $self->{session} = shift;
+    }
+    return $self->{session};
+}
+sub ciphersuite_len
+{
+    my $self = shift;
+    if (@_) {
+      $self->{ciphersuite_len} = shift;
+    }
+    return $self->{ciphersuite_len};
+}
+sub ciphersuites
+{
+    my $self = shift;
+    if (@_) {
+      $self->{ciphersuites} = shift;
+    }
+    return $self->{ciphersuites};
+}
+sub comp_meth_len
+{
+    my $self = shift;
+    if (@_) {
+      $self->{comp_meth_len} = shift;
+    }
+    return $self->{comp_meth_len};
+}
+sub comp_meths
+{
+    my $self = shift;
+    if (@_) {
+      $self->{comp_meths} = shift;
+    }
+    return $self->{comp_meths};
+}
+sub extensions_len
+{
+    my $self = shift;
+    if (@_) {
+      $self->{extensions_len} = shift;
+    }
+    return $self->{extensions_len};
+}
+sub extension_data
+{
+    my $self = shift;
+    if (@_) {
+      $self->{extension_data} = shift;
+    }
+    return $self->{extension_data};
+}
+sub set_extension
+{
+    my ($self, $ext_type, $ext_data) = @_;
+    $self->{extension_data}{$ext_type} = $ext_data;
+}
+sub delete_extension
+{
+    my ($self, $ext_type) = @_;
+    delete $self->{extension_data}{$ext_type};
+}
+1;