#!/usr/bin/perl
use Getopt::Long;
use strict;
use warnings;
use FileHandle;
my $dumpchannels = 0;
my $dumpdata = 0;
my $pass_through_events = 0;
my $verbose_all;
my %verbose_packet;
GetOptions("dump-channels|c" => \$dumpchannels,
"dump-data|d" => \$dumpdata,
"verbose|v" => \$verbose_all,
"full|f=s" => sub { $verbose_packet{$_[1]} = 1; },
"events|e" => \$pass_through_events,
"help" => sub { &usage(\*STDOUT, 0); })
or &usage(\*STDERR, 1);
sub usage {
my ($fh, $exitstatus) = @_;
print $fh <<'EOF';
usage: logparse.pl [ options ] [ input-log-file ]
options: --dump-channels, -c dump the final state of every channel
--dump-data, -d save data of every channel to ch0.i, ch0.o, ...
--full=PKT, -f PKT print extra detail for packets of type PKT
--verbose, -v print extra detail for all packets if available
--events, -e copy Event Log messages from input log file
EOF
exit $exitstatus;
}
my @channels = (); # ultimate channel ids are indices in this array
my %chan_by_id = (); # indexed by 'c%d' or 's%d' for client and server ids
my %globalreq = (); # indexed by 'i' or 'o'
my %packets = (
#define SSH2_MSG_DISCONNECT 1 /* 0x1 */
'SSH2_MSG_DISCONNECT' => sub {
my ($direction, $seq, $data) = @_;
my ($reason, $description, $lang) = &parse("uss", $data);
printf "%s\n", &str($description);
},
#define SSH2_MSG_IGNORE 2 /* 0x2 */
'SSH2_MSG_IGNORE' => sub {
my ($direction, $seq, $data) = @_;
my ($str) = &parse("s", $data);
printf "(%d bytes)\n", length $str;
},
#define SSH2_MSG_UNIMPLEMENTED 3 /* 0x3 */
'SSH2_MSG_UNIMPLEMENTED' => sub {
my ($direction, $seq, $data) = @_;
my ($rseq) = &parse("u", $data);
printf "i%d\n", $rseq;
},
#define SSH2_MSG_DEBUG 4 /* 0x4 */
'SSH2_MSG_DEBUG' => sub {
my ($direction, $seq, $data) = @_;
my ($disp, $message, $lang) = &parse("bss", $data);
printf "%s\n", &str($message);
},
#define SSH2_MSG_SERVICE_REQUEST 5 /* 0x5 */
'SSH2_MSG_SERVICE_REQUEST' => sub {
my ($direction, $seq, $data) = @_;
my ($service) = &parse("s", $data);
printf "%s\n", &str($service);
},
#define SSH2_MSG_SERVICE_ACCEPT 6 /* 0x6 */
'SSH2_MSG_SERVICE_ACCEPT' => sub {
my ($direction, $seq, $data) = @_;
my ($service) = &parse("s", $data);
printf "%s\n", &str($service);
},
#define SSH2_MSG_KEXINIT 20 /* 0x14 */
'SSH2_MSG_KEXINIT' => sub {
my ($direction, $seq, $data) = @_;
print "\n";
},
#define SSH2_MSG_NEWKEYS 21 /* 0x15 */
'SSH2_MSG_NEWKEYS' => sub {
my ($direction, $seq, $data) = @_;
print "\n";
},
#define SSH2_MSG_KEXDH_INIT 30 /* 0x1e */
'SSH2_MSG_KEXDH_INIT' => sub {
my ($direction, $seq, $data) = @_;
print "\n";
},
#define SSH2_MSG_KEXDH_REPLY 31 /* 0x1f */
'SSH2_MSG_KEXDH_REPLY' => sub {
my ($direction, $seq, $data) = @_;
print "\n";
},
#define SSH2_MSG_KEX_DH_GEX_REQUEST 30 /* 0x1e */
'SSH2_MSG_KEX_DH_GEX_REQUEST' => sub {
my ($direction, $seq, $data) = @_;
print "\n";
},
#define SSH2_MSG_KEX_DH_GEX_GROUP 31 /* 0x1f */
'SSH2_MSG_KEX_DH_GEX_GROUP' => sub {
my ($direction, $seq, $data) = @_;
print "\n";
},
#define SSH2_MSG_KEX_DH_GEX_INIT 32 /* 0x20 */
'SSH2_MSG_KEX_DH_GEX_INIT' => sub {
my ($direction, $seq, $data) = @_;
print "\n";
},
#define SSH2_MSG_KEX_DH_GEX_REPLY 33 /* 0x21 */
'SSH2_MSG_KEX_DH_GEX_REPLY' => sub {
my ($direction, $seq, $data) = @_;
print "\n";
},
#define SSH2_MSG_KEXGSS_INIT 30 /* 0x1e */
'SSH2_MSG_KEXGSS_INIT' => sub {
my ($direction, $seq, $data) = @_;
print "\n";
},
#define SSH2_MSG_KEXGSS_CONTINUE 31 /* 0x1f */
'SSH2_MSG_KEXGSS_CONTINUE' => sub {
my ($direction, $seq, $data) = @_;
print "\n";
},
#define SSH2_MSG_KEXGSS_COMPLETE 32 /* 0x20 */
'SSH2_MSG_KEXGSS_COMPLETE' => sub {
my ($direction, $seq, $data) = @_;
print "\n";
},
#define SSH2_MSG_KEXGSS_HOSTKEY 33 /* 0x21 */
'SSH2_MSG_KEXGSS_HOSTKEY' => sub {
my ($direction, $seq, $data) = @_;
print "\n";
},
#define SSH2_MSG_KEXGSS_ERROR 34 /* 0x22 */
'SSH2_MSG_KEXGSS_ERROR' => sub {
my ($direction, $seq, $data) = @_;
print "\n";
},
#define SSH2_MSG_KEXGSS_GROUPREQ 40 /* 0x28 */
'SSH2_MSG_KEXGSS_GROUPREQ' => sub {
my ($direction, $seq, $data) = @_;
print "\n";
},
#define SSH2_MSG_KEXGSS_GROUP 41 /* 0x29 */
'SSH2_MSG_KEXGSS_GROUP' => sub {
my ($direction, $seq, $data) = @_;
print "\n";
},
#define SSH2_MSG_KEXRSA_PUBKEY 30 /* 0x1e */
'SSH2_MSG_KEXRSA_PUBKEY' => sub {
my ($direction, $seq, $data) = @_;
print "\n";
},
#define SSH2_MSG_KEXRSA_SECRET 31 /* 0x1f */
'SSH2_MSG_KEXRSA_SECRET' => sub {
my ($direction, $seq, $data) = @_;
print "\n";
},
#define SSH2_MSG_KEXRSA_DONE 32 /* 0x20 */
'SSH2_MSG_KEXRSA_DONE' => sub {
my ($direction, $seq, $data) = @_;
print "\n";
},
#define SSH2_MSG_KEX_ECDH_INIT 30 /* 0x1e */
'SSH2_MSG_KEX_ECDH_INIT' => sub {
my ($direction, $seq, $data) = @_;
print "\n";
},
#define SSH2_MSG_KEX_ECDH_REPLY 31 /* 0x1f */
'SSH2_MSG_KEX_ECDH_REPLY' => sub {
my ($direction, $seq, $data) = @_;
print "\n";
},
#define SSH2_MSG_USERAUTH_REQUEST 50 /* 0x32 */
'SSH2_MSG_USERAUTH_REQUEST' => sub {
my ($direction, $seq, $data) = @_;
my ($user, $service, $method) = &parse("sss", $data);
my $out = sprintf "%s %s %s",
&str($user), &str($service), &str($method);
if ($method eq "publickey") {
my ($real) = &parse("b", $data);
$out .= " real=$real";
} elsif ($method eq "password") {
my ($change) = &parse("b", $data);
$out .= " change=$change";
}
print "$out\n";
},
#define SSH2_MSG_USERAUTH_FAILURE 51 /* 0x33 */
'SSH2_MSG_USERAUTH_FAILURE' => sub {
my ($direction, $seq, $data) = @_;
my ($options) = &parse("s", $data);
printf "%s\n", &str($options);
},
#define SSH2_MSG_USERAUTH_SUCCESS 52 /* 0x34 */
'SSH2_MSG_USERAUTH_SUCCESS' => sub {
my ($direction, $seq, $data) = @_;
print "\n";
},
#define SSH2_MSG_USERAUTH_BANNER 53 /* 0x35 */
'SSH2_MSG_USERAUTH_BANNER' => sub {
my ($direction, $seq, $data) = @_;
print "\n";
},
#define SSH2_MSG_USERAUTH_PK_OK 60 /* 0x3c */
'SSH2_MSG_USERAUTH_PK_OK' => sub {
my ($direction, $seq, $data) = @_;
print "\n";
},
#define SSH2_MSG_USERAUTH_PASSWD_CHANGEREQ 60 /* 0x3c */
'SSH2_MSG_USERAUTH_PASSWD_CHANGEREQ' => sub {
my ($direction, $seq, $data) = @_;
print "\n";
},
#define SSH2_MSG_USERAUTH_INFO_REQUEST 60 /* 0x3c */
'SSH2_MSG_USERAUTH_INFO_REQUEST' => sub {
my ($direction, $seq, $data) = @_;
print "\n";
},
#define SSH2_MSG_USERAUTH_INFO_RESPONSE 61 /* 0x3d */
'SSH2_MSG_USERAUTH_INFO_RESPONSE' => sub {
my ($direction, $seq, $data) = @_;
print "\n";
},
#define SSH2_MSG_GLOBAL_REQUEST 80 /* 0x50 */
'SSH2_MSG_GLOBAL_REQUEST' => sub {
my ($direction, $seq, $data) = @_;
my ($type, $wantreply) = &parse("sb", $data);
printf "%s (%s)", $type, $wantreply eq "yes" ? "reply" : "noreply";
my $request = [$seq, $type];
push @{$globalreq{$direction}}, $request if $wantreply eq "yes";
if ($type eq "tcpip-forward" or $type eq "cancel-tcpip-forward") {
my ($addr, $port) = &parse("su", $data);
printf " %s:%s", $addr, $port;
push @$request, $port;
}
print "\n";
},
#define SSH2_MSG_REQUEST_SUCCESS 81 /* 0x51 */
'SSH2_MSG_REQUEST_SUCCESS' => sub {
my ($direction, $seq, $data) = @_;
my $otherdir = ($direction eq "i" ? "o" : "i");
my $request = shift @{$globalreq{$otherdir}};
if (defined $request) {
printf "to %s", $request->[0];
if ($request->[1] eq "tcpip-forward" and $request->[2] == 0) {
my ($port) = &parse("u", $data);
printf " port=%s", $port;
}
} else {
print "(spurious?)";
}
print "\n";
},
#define SSH2_MSG_REQUEST_FAILURE 82 /* 0x52 */
'SSH2_MSG_REQUEST_FAILURE' => sub {
my ($direction, $seq, $data) = @_;
my $otherdir = ($direction eq "i" ? "o" : "i");
my $request = shift @{$globalreq{$otherdir}};
if (defined $request) {
printf "to %s", $request->[0];
} else {
print "(spurious?)";
}
print "\n";
},
#define SSH2_MSG_CHANNEL_OPEN 90 /* 0x5a */
'SSH2_MSG_CHANNEL_OPEN' => sub {
my ($direction, $seq, $data) = @_;
my ($type, $sid, $winsize, $packet) = &parse("suuu", $data);
# CHANNEL_OPEN tells the other side the _sender's_ id for the
# channel, so this choice between "s" and "c" prefixes is
# opposite to every other message in the protocol, which all
# quote the _recipient's_ id of the channel.
$sid = ($direction eq "i" ? "s" : "c") . $sid;
my $chan = {'id'=>$sid, 'state'=>'halfopen',
'i'=>{'win'=>0, 'seq'=>0},
'o'=>{'win'=>0, 'seq'=>0}};
$chan->{$direction}{'win'} = $winsize;
push @channels, $chan;
my $index = $#channels;
$chan_by_id{$sid} = $index;
printf "ch%d (%s) %s (--%d)", $index, $chan->{'id'}, $type,
$chan->{$direction}{'win'};
if ($type eq "x11") {
my ($addr, $port) = &parse("su", $data);
printf " from %s:%s", $addr, $port;
} elsif ($type eq "forwarded-tcpip") {
my ($saddr, $sport, $paddr, $pport) = &parse("susu", $data);
printf " to %s:%s from %s:%s", $saddr, $sport, $paddr, $pport;
} elsif ($type eq "direct-tcpip") {
my ($daddr, $dport, $saddr, $sport) = &parse("susu", $data);
printf " to %s:%s from %s:%s", $daddr, $dport, $saddr, $sport;
}
print "\n";
},
#define SSH2_MSG_CHANNEL_OPEN_CONFIRMATION 91 /* 0x5b */
'SSH2_MSG_CHANNEL_OPEN_CONFIRMATION' => sub {
my ($direction, $seq, $data) = @_;
my ($rid, $sid, $winsize, $packet) = &parse("uuuu", $data);
$rid = ($direction eq "i" ? "c" : "s") . $rid;
my $index = $chan_by_id{$rid};
if (!defined $index) {
printf "UNKNOWN_CHANNEL (%s) (--%d)\n", $rid, $winsize;
return;
}
$sid = ($direction eq "i" ? "s" : "c") . $sid;
$chan_by_id{$sid} = $index;
my $chan = $channels[$index];
$chan->{'id'} = ($direction eq "i" ? "$rid/$sid" : "$sid/$rid");
$chan->{'state'} = 'open';
$chan->{$direction}{'win'} = $winsize;
printf "ch%d (%s) (--%d)\n", $index, $chan->{'id'},
$chan->{$direction}{'win'};
},
#define SSH2_MSG_CHANNEL_OPEN_FAILURE 92 /* 0x5c */
'SSH2_MSG_CHANNEL_OPEN_FAILURE' => sub {
my ($direction, $seq, $data) = @_;
my ($rid, $reason, $desc, $lang) = &parse("uuss", $data);
$rid = ($direction eq "i" ? "c" : "s") . $rid;
my $index = $chan_by_id{$rid};
if (!defined $index) {
printf "UNKNOWN_CHANNEL (%s) %s\n", $rid, &str($reason);
return;
}
my $chan = $channels[$index];
$chan->{'state'} = 'rejected';
printf "ch%d (%s) %s\n", $index, $chan->{'id'}, &str($reason);
},
#define SSH2_MSG_CHANNEL_WINDOW_ADJUST 93 /* 0x5d */
'SSH2_MSG_CHANNEL_WINDOW_ADJUST' => sub {
my ($direction, $seq, $data) = @_;
my ($rid, $bytes) = &parse("uu", $data);
$rid = ($direction eq "i" ? "c" : "s") . $rid;
my $index = $chan_by_id{$rid};
if (!defined $index) {
printf "UNKNOWN_CHANNEL (%s) +%d\n", $rid, $bytes;
return;
}
my $chan = $channels[$index];
$chan->{$direction}{'win'} += $bytes;
printf "ch%d (%s) +%d (--%d)\n", $index, $chan->{'id'}, $bytes,
$chan->{$direction}{'win'};
},
#define SSH2_MSG_CHANNEL_DATA 94 /* 0x5e */
'SSH2_MSG_CHANNEL_DATA' => sub {
my ($direction, $seq, $data) = @_;
my ($rid, $bytes) = &parse("uu", $data);
$rid = ($direction eq "i" ? "c" : "s") . $rid;
my $index = $chan_by_id{$rid};
if (!defined $index) {
printf "UNKNOWN_CHANNEL (%s), %s bytes\n", $rid, $bytes;
return;
}
my $chan = $channels[$index];
$chan->{$direction}{'seq'} += $bytes;
printf "ch%d (%s), %s bytes (%d--%d)\n", $index, $chan->{'id'}, $bytes,
$chan->{$direction}{'seq'}-$bytes, $chan->{$direction}{'seq'};
my @realdata = splice @$data, 0, $bytes;
if ($dumpdata) {
my $filekey = $direction . "file";
if (!defined $chan->{$filekey}) {
my $filename = sprintf "ch%d.%s", $index, $direction;
$chan->{$filekey} = FileHandle->new(">$filename");
if (!defined $chan->{$filekey}) {
die "$filename: $!\n";
}
}
die "channel data not present in $seq\n" if @realdata < $bytes;
my $rawdata = pack "C*", @realdata;
my $fh = $chan->{$filekey};
print $fh $rawdata;
}
if (@realdata == $bytes and defined $chan->{$direction."data"}) {
my $rawdata = pack "C*", @realdata;
$chan->{$direction."data"}->($chan, $index, $direction, $rawdata);
}
},
#define SSH2_MSG_CHANNEL_EXTENDED_DATA 95 /* 0x5f */
'SSH2_MSG_CHANNEL_EXTENDED_DATA' => sub {
my ($direction, $seq, $data) = @_;
my ($rid, $type, $bytes) = &parse("uuu", $data);
if ($type == 1) {
$type = "SSH_EXTENDED_DATA_STDERR";
}
$rid = ($direction eq "i" ? "c" : "s") . $rid;
my $index = $chan_by_id{$rid};
if (!defined $index) {
printf "UNKNOWN_CHANNEL (%s), type %s, %s bytes\n", $rid,
$type, $bytes;
return;
}
my $chan = $channels[$index];
$chan->{$direction}{'seq'} += $bytes;
printf "ch%d (%s), type %s, %s bytes (%d--%d)\n", $index,$chan->{'id'},
$type, $bytes, $chan->{$direction}{'seq'}-$bytes,
$chan->{$direction}{'seq'};
my @realdata = splice @$data, 0, $bytes;
if ($dumpdata) {
# We treat EXTENDED_DATA as equivalent to DATA, for the
# moment. It's not clear what else would be a better thing
# to do with it, and this at least is the Right Answer if
# the data is going to a terminal and the aim is to debug
# the terminal emulator.
my $filekey = $direction . "file";
if (!defined $chan->{$filekey}) {
my $filename = sprintf "ch%d.%s", $index, $direction;
$chan->{$filekey} = FileHandle->new(">$filename");
if (!defined $chan->{$filekey}) {
die "$filename: $!\n";
}
}
die "channel data not present in $seq\n" if @realdata < $bytes;
my $rawdata = pack "C*", @realdata;
my $fh = $chan->{$filekey};
print $fh $rawdata;
}
if (@realdata == $bytes and defined $chan->{$direction."data"}) {
my $rawdata = pack "C*", @realdata;
$chan->{$direction."data"}->($chan, $index, $direction, $rawdata);
}
},
#define SSH2_MSG_CHANNEL_EOF 96 /* 0x60 */
'SSH2_MSG_CHANNEL_EOF' => sub {
my ($direction, $seq, $data) = @_;
my ($rid) = &parse("uu", $data);
$rid = ($direction eq "i" ? "c" : "s") . $rid;
my $index = $chan_by_id{$rid};
if (!defined $index) {
printf "UNKNOWN_CHANNEL (%s)\n", $rid;
return;
}
my $chan = $channels[$index];
printf "ch%d (%s)\n", $index, $chan->{'id'};
},
#define SSH2_MSG_CHANNEL_CLOSE 97 /* 0x61 */
'SSH2_MSG_CHANNEL_CLOSE' => sub {
my ($direction, $seq, $data) = @_;
my ($rid) = &parse("uu", $data);
$rid = ($direction eq "i" ? "c" : "s") . $rid;
my $index = $chan_by_id{$rid};
if (!defined $index) {
printf "UNKNOWN_CHANNEL (%s)\n", $rid;
return;
}
my $chan = $channels[$index];
$chan->{'state'} = ($chan->{'state'} eq "open" ? "halfclosed" :
$chan->{'state'} eq "halfclosed" ? "closed" :
"confused");
if ($chan->{'state'} eq "closed") {
$chan->{'ifile'}->close if defined $chan->{'ifile'};
$chan->{'ofile'}->close if defined $chan->{'ofile'};
}
printf "ch%d (%s)\n", $index, $chan->{'id'};
},
#define SSH2_MSG_CHANNEL_REQUEST 98 /* 0x62 */
'SSH2_MSG_CHANNEL_REQUEST' => sub {
my ($direction, $seq, $data) = @_;
my ($rid, $type, $wantreply) = &parse("usb", $data);
$rid = ($direction eq "i" ? "c" : "s") . $rid;
my $index = $chan_by_id{$rid};
my $chan;
if (!defined $index) {
printf "UNKNOWN_CHANNEL (%s) %s (%s)", $rid,
$type, $wantreply eq "yes" ? "reply" : "noreply";
} else {
$chan = $channels[$index];
printf "ch%d (%s) %s (%s)", $index, $chan->{'id'},
$type, $wantreply eq "yes" ? "reply" : "noreply";
push @{$chan->{'requests_'.$direction}}, [$seq, $type]
if $wantreply eq "yes";
}
if ($type eq "pty-req") {
my ($term, $w, $h, $pw, $ph, $modes) = &parse("suuuus", $data);
printf " %s %sx%s", &str($term), $w, $h;
} elsif ($type eq "x11-req") {
my ($single, $xprot, $xcookie, $xscreen) = &parse("bssu", $data);
print " one-off" if $single eq "yes";
printf " %s :%s", $xprot, $xscreen;
} elsif ($type eq "exec") {
my ($command) = &parse("s", $data);
printf " %s", &str($command);
} elsif ($type eq "subsystem") {
my ($subsys) = &parse("s", $data);
printf " %s", &str($subsys);
if ($subsys eq "sftp") {
&sftp_setup($index);
}
} elsif ($type eq "window-change") {
my ($w, $h, $pw, $ph) = &parse("uuuu", $data);
printf " %sx%s", $w, $h;
} elsif ($type eq "xon-xoff") {
my ($can) = &parse("b", $data);
printf " %s", $can;
} elsif ($type eq "signal") {
my ($sig) = &parse("s", $data);
printf " %s", &str($sig);
} elsif ($type eq "exit-status") {
my ($status) = &parse("u", $data);
printf " %s", $status;
} elsif ($type eq "exit-signal") {
my ($sig, $core, $error, $lang) = &parse("sbss", $data);
printf " %s", &str($sig);
print " (core dumped)" if $core eq "yes";
}
print "\n";
},
#define SSH2_MSG_CHANNEL_SUCCESS 99 /* 0x63 */
'SSH2_MSG_CHANNEL_SUCCESS' => sub {
my ($direction, $seq, $data) = @_;
my ($rid) = &parse("uu", $data);
$rid = ($direction eq "i" ? "c" : "s") . $rid;
my $index = $chan_by_id{$rid};
if (!defined $index) {
printf "UNKNOWN_CHANNEL (%s)\n", $rid;
return;
}
my $chan = $channels[$index];
printf "ch%d (%s)", $index, $chan->{'id'};
my $otherdir = ($direction eq "i" ? "o" : "i");
my $request = shift @{$chan->{'requests_' . $otherdir}};
if (defined $request) {
printf " to %s", $request->[0];
} else {
print " (spurious?)";
}
print "\n";
},
#define SSH2_MSG_CHANNEL_FAILURE 100 /* 0x64 */
'SSH2_MSG_CHANNEL_FAILURE' => sub {
my ($direction, $seq, $data) = @_;
my ($rid) = &parse("uu", $data);
$rid = ($direction eq "i" ? "c" : "s") . $rid;
my $index = $chan_by_id{$rid};
if (!defined $index) {
printf "UNKNOWN_CHANNEL (%s)\n", $rid;
return;
}
my $chan = $channels[$index];
printf "ch%d (%s)", $index, $chan->{'id'};
my $otherdir = ($direction eq "i" ? "o" : "i");
my $request = shift @{$chan->{'requests_' . $otherdir}};
if (defined $request) {
printf " to %s", $request->[0];
} else {
print " (spurious?)";
}
print "\n";
},
#define SSH2_MSG_USERAUTH_GSSAPI_RESPONSE 60
'SSH2_MSG_USERAUTH_GSSAPI_RESPONSE' => sub {
my ($direction, $seq, $data) = @_;
print "\n";
},
#define SSH2_MSG_USERAUTH_GSSAPI_TOKEN 61
'SSH2_MSG_USERAUTH_GSSAPI_TOKEN' => sub {
my ($direction, $seq, $data) = @_;
print "\n";
},
#define SSH2_MSG_USERAUTH_GSSAPI_EXCHANGE_COMPLETE 63
'SSH2_MSG_USERAUTH_GSSAPI_EXCHANGE_COMPLETE' => sub {
my ($direction, $seq, $data) = @_;
print "\n";
},
#define SSH2_MSG_USERAUTH_GSSAPI_ERROR 64
'SSH2_MSG_USERAUTH_GSSAPI_ERROR' => sub {
my ($direction, $seq, $data) = @_;
print "\n";
},
#define SSH2_MSG_USERAUTH_GSSAPI_ERRTOK 65
'SSH2_MSG_USERAUTH_GSSAPI_ERRTOK' => sub {
my ($direction, $seq, $data) = @_;
print "\n";
},
#define SSH2_MSG_USERAUTH_GSSAPI_MIC 66
'SSH2_MSG_USERAUTH_GSSAPI_MIC' => sub {
my ($direction, $seq, $data) = @_;
print "\n";
},
);
our %disc_reasons = (
1 => "SSH_DISCONNECT_HOST_NOT_ALLOWED_TO_CONNECT",
2 => "SSH_DISCONNECT_PROTOCOL_ERROR",
3 => "SSH_DISCONNECT_KEY_EXCHANGE_FAILED",
4 => "SSH_DISCONNECT_RESERVED",
5 => "SSH_DISCONNECT_MAC_ERROR",
6 => "SSH_DISCONNECT_COMPRESSION_ERROR",
7 => "SSH_DISCONNECT_SERVICE_NOT_AVAILABLE",
8 => "SSH_DISCONNECT_PROTOCOL_VERSION_NOT_SUPPORTED",
9 => "SSH_DISCONNECT_HOST_KEY_NOT_VERIFIABLE",
10 => "SSH_DISCONNECT_CONNECTION_LOST",
11 => "SSH_DISCONNECT_BY_APPLICATION",
12 => "SSH_DISCONNECT_TOO_MANY_CONNECTIONS",
13 => "SSH_DISCONNECT_AUTH_CANCELLED_BY_USER",
14 => "SSH_DISCONNECT_NO_MORE_AUTH_METHODS_AVAILABLE",
15 => "SSH_DISCONNECT_ILLEGAL_USER_NAME",
);
my %verbose_packet_dump_functions = (
'SSH2_MSG_KEXINIT' => sub {
my ($data) = @_;
my ($cookie0, $cookie1, $cookie2, $cookie3,
$kex, $hostkey, $cscipher, $sccipher, $csmac, $scmac,
$cscompress, $sccompress, $cslang, $sclang, $guess, $reserved) =
&parse("uuuussssssssssbu", $data);
printf(" cookie: %08x%08x%08x%08x\n",
$cookie0, $cookie1, $cookie2, $cookie3);
my $print_namelist = sub {
my @names = split /,/, $_[1];
printf " %s: name-list with %d items%s\n", $_[0], (scalar @names),
join "", map { "\n $_" } @names;
};
$print_namelist->("kex", $kex);
$print_namelist->("host key", $hostkey);
$print_namelist->("client->server cipher", $cscipher);
$print_namelist->("server->client cipher", $sccipher);
$print_namelist->("client->server MAC", $csmac);
$print_namelist->("server->client MAC", $scmac);
$print_namelist->("client->server compression", $cscompress);
$print_namelist->("server->client compression", $sccompress);
$print_namelist->("client->server language", $cslang);
$print_namelist->("server->client language", $sclang);
printf " first kex packet follows: %s\n", $guess;
printf " reserved field: %#x\n", $reserved;
},
'SSH2_MSG_KEXDH_INIT' => sub {
my ($data) = @_;
my ($e) = &parse("m", $data);
printf " e: %s\n", $e;
},
'SSH2_MSG_KEX_DH_GEX_REQUEST' => sub {
my ($data) = @_;
my ($min, $pref, $max) = &parse("uuu", $data);
printf " min bits: %d\n", $min;
printf " preferred bits: %d\n", $pref;
printf " max bits: %d\n", $max;
},
'SSH2_MSG_KEX_DH_GEX_GROUP' => sub {
my ($data) = @_;
my ($p, $g) = &parse("mm", $data);
printf " p: %s\n", $p;
printf " g: %s\n", $g;
},
'SSH2_MSG_KEX_DH_GEX_INIT' => sub {
my ($data) = @_;
my ($e) = &parse("m", $data);
printf " e: %s\n", $e;
},
'SSH2_MSG_KEX_ECDH_INIT' => sub {
my ($data) = @_;
my ($cpv) = &parse("s", $data);
# Public values in ECDH depend for their interpretation on the
# selected curve, and this script doesn't cross-analyse the
# two KEXINIT packets to independently figure out what that
# curve is. So the best we can do is just dump the raw data.
printf " client public value: %s\n", (unpack "H*", $cpv);
},
'SSH2_MSG_KEXDH_REPLY' => sub {
my ($data) = @_;
my ($hostkeyblob, $f, $sigblob) = &parse("sms", $data);
my ($hktype, @hostkey) = &parse_public_key($hostkeyblob);
printf " host key: %s\n", $hktype;
while (@hostkey) {
my ($key, $value) = splice @hostkey, 0, 2;
printf " $key: $value\n";
}
printf " f: %s\n", $f;
printf " signature:\n";
my @signature = &parse_signature($sigblob, $hktype);
while (@signature) {
my ($key, $value) = splice @signature, 0, 2;
printf " $key: $value\n";
}
},
'SSH2_MSG_KEX_DH_GEX_REPLY' => sub {
my ($data) = @_;
my ($hostkeyblob, $f, $sigblob) = &parse("sms", $data);
my ($hktype, @hostkey) = &parse_public_key($hostkeyblob);
printf " host key: %s\n", $hktype;
while (@hostkey) {
my ($key, $value) = splice @hostkey, 0, 2;
printf " $key: $value\n";
}
printf " f: %s\n", $f;
printf " signature:\n";
my @signature = &parse_signature($sigblob, $hktype);
while (@signature) {
my ($key, $value) = splice @signature, 0, 2;
printf " $key: $value\n";
}
},
'SSH2_MSG_KEX_ECDH_REPLY' => sub {
my ($data) = @_;
my ($hostkeyblob, $spv, $sigblob) = &parse("sss", $data);
my ($hktype, @hostkey) = &parse_public_key($hostkeyblob);
printf " host key: %s\n", $hktype;
while (@hostkey) {
my ($key, $value) = splice @hostkey, 0, 2;
printf " $key: $value\n";
}
printf " server public value: %s\n", (unpack "H*", $spv);
printf " signature:\n";
my @signature = &parse_signature($sigblob, $hktype);
while (@signature) {
my ($key, $value) = splice @signature, 0, 2;
printf " $key: $value\n";
}
},
'SSH2_MSG_NEWKEYS' => sub {},
'SSH2_MSG_SERVICE_REQUEST' => sub {
my ($data) = @_;
my ($servname) = &parse("s", $data);
printf " service name: %s\n", $servname;
},
'SSH2_MSG_SERVICE_ACCEPT' => sub {
my ($data) = @_;
my ($servname) = &parse("s", $data);
printf " service name: %s\n", $servname;
},
'SSH2_MSG_DISCONNECT' => sub {
my ($data) = @_;
my ($reason, $desc, $lang) = &parse("uss", $data);
printf(" reason code: %d%s\n", $reason,
defined $disc_reasons{$reason} ?
" ($disc_reasons{$reason})" : "" );
printf " description: '%s'\n", $desc;
printf " language tag: '%s'\n", $lang;
},
'SSH2_MSG_DEBUG' => sub {
my ($data) = @_;
my ($display, $desc, $lang) = &parse("bss", $data);
printf " always display: %s\n", $display;
printf " description: '%s'\n", $desc;
printf " language tag: '%s'\n", $lang;
},
'SSH2_MSG_IGNORE' => sub {
my ($data) = @_;
my ($payload) = &parse("s", $data);
printf " data: %s\n", unpack "H*", $payload;
},
'SSH2_MSG_UNIMPLEMENTED' => sub {
my ($data) = @_;
my ($seq) = &parse("u", $data);
printf " sequence number: %d\n", $seq;
},
'SSH2_MSG_KEXGSS_INIT' => sub {
my ($data) = @_;
my ($token, $e) = &parse("sm", $data);
printf " output token: %s\n", unpack "H*", $token;
printf " e: %s\n", $e;
},
'SSH2_MSG_KEXGSS_CONTINUE' => sub {
my ($data) = @_;
my ($token) = &parse("s", $data);
printf " output token: %s\n", unpack "H*", $token;
},
'SSH2_MSG_KEXGSS_COMPLETE' => sub {
my ($data) = @_;
my ($f, $permsgtoken, $got_output) = &parse("msb", $data);
printf " f: %s\n", $f;
printf " per-message token: %s\n", unpack "H*", $permsgtoken;
printf " output token present: %s\n", $got_output;
if ($got_output eq "yes") {
my ($token) = &parse("s", $data);
printf " output token: %s\n", unpack "H*", $token;
}
},
'SSH2_MSG_KEXGSS_HOSTKEY' => sub {
my ($data) = @_;
my ($hostkey) = &parse("s", $data);
printf " host key: %s\n", unpack "H*", $hostkey;
},
'SSH2_MSG_KEXGSS_ERROR' => sub {
my ($data) = @_;
my ($maj, $min, $msg, $lang) = &parse("uuss", $data);
printf " major status: %d\n", $maj;
printf " minor status: %d\n", $min;
printf " message: '%s'\n", $msg;
printf " language tag: '%s'\n", $lang;
},
'SSH2_MSG_KEXGSS_GROUPREQ' => sub {
my ($data) = @_;
my ($min, $pref, $max) = &parse("uuu", $data);
printf " min bits: %d\n", $min;
printf " preferred bits: %d\n", $pref;
printf " max bits: %d\n", $max;
},
'SSH2_MSG_KEXGSS_GROUP' => sub {
my ($data) = @_;
my ($p, $g) = &parse("mm", $data);
printf " p: %s\n", $p;
printf " g: %s\n", $g;
},
);
my %sftp_packets = (
#define SSH_FXP_INIT 1 /* 0x1 */
0x1 => sub {
my ($chan, $index, $direction, $id, $data) = @_;
my ($ver) = &parse("u", $data);
printf "SSH_FXP_INIT %d\n", $ver;
},
#define SSH_FXP_VERSION 2 /* 0x2 */
0x2 => sub {
my ($chan, $index, $direction, $id, $data) = @_;
my ($ver) = &parse("u", $data);
printf "SSH_FXP_VERSION %d\n", $ver;
},
#define SSH_FXP_OPEN 3 /* 0x3 */
0x3 => sub {
my ($chan, $index, $direction, $id, $data) = @_;
my ($reqid, $path, $pflags) = &parse("usu", $data);
&sftp_logreq($chan, $direction, $reqid, $id, "SSH_FXP_OPEN");
printf " \"%s\" ", $path;
if ($pflags eq 0) {
print "0";
} else {
my $sep = "";
if ($pflags & 1) { $pflags ^= 1; print "${sep}READ"; $sep = "|"; }
if ($pflags & 2) { $pflags ^= 2; print "${sep}WRITE"; $sep = "|"; }
if ($pflags & 4) { $pflags ^= 4; print "${sep}APPEND"; $sep = "|"; }
if ($pflags & 8) { $pflags ^= 8; print "${sep}CREAT"; $sep = "|"; }
if ($pflags & 16) { $pflags ^= 16; print "${sep}TRUNC"; $sep = "|"; }
if ($pflags & 32) { $pflags ^= 32; print "${sep}EXCL"; $sep = "|"; }
if ($pflags) { print "${sep}${pflags}"; }
}
print "\n";
},
#define SSH_FXP_CLOSE 4 /* 0x4 */
0x4 => sub {
my ($chan, $index, $direction, $id, $data) = @_;
my ($reqid, $handle) = &parse("us", $data);
&sftp_logreq($chan, $direction, $reqid, $id, "SSH_FXP_CLOSE");
printf " \"%s\"", &stringescape($handle);
print "\n";
},
#define SSH_FXP_READ 5 /* 0x5 */
0x5 => sub {
my ($chan, $index, $direction, $id, $data) = @_;
my ($reqid, $handle, $offset, $len) = &parse("usUu", $data);
&sftp_logreq($chan, $direction, $reqid, $id, "SSH_FXP_READ");
printf " \"%s\" %d %d", &stringescape($handle), $offset, $len;
print "\n";
},
#define SSH_FXP_WRITE 6 /* 0x6 */
0x6 => sub {
my ($chan, $index, $direction, $id, $data) = @_;
my ($reqid, $handle, $offset, $wdata) = &parse("usUs", $data);
&sftp_logreq($chan, $direction, $reqid, $id, "SSH_FXP_WRITE");
printf " \"%s\" %d [%d bytes]", &stringescape($handle), $offset, length $wdata;
print "\n";
},
#define SSH_FXP_LSTAT 7 /* 0x7 */
0x7 => sub {
my ($chan, $index, $direction, $id, $data) = @_;
my ($reqid, $path) = &parse("us", $data);
&sftp_logreq($chan, $direction, $reqid, $id, "SSH_FXP_LSTAT");
printf " \"%s\"", $path;
print "\n";
},
#define SSH_FXP_FSTAT 8 /* 0x8 */
0x8 => sub {
my ($chan, $index, $direction, $id, $data) = @_;
my ($reqid, $handle) = &parse("us", $data);
&sftp_logreq($chan, $direction, $reqid, $id, "SSH_FXP_FSTAT");
printf " \"%s\"", &stringescape($handle);
print "\n";
},
#define SSH_FXP_SETSTAT 9 /* 0x9 */
0x9 => sub {
my ($chan, $index, $direction, $id, $data) = @_;
my ($reqid, $path) = &parse("us", $data);
&sftp_logreq($chan, $direction, $reqid, $id, "SSH_FXP_SETSTAT");
my $attrs = &sftp_parse_attrs($data);
printf " \"%s\" %s", $path, $attrs;
print "\n";
},
#define SSH_FXP_FSETSTAT 10 /* 0xa */
0xa => sub {
my ($chan, $index, $direction, $id, $data) = @_;
my ($reqid, $handle) = &parse("us", $data);
&sftp_logreq($chan, $direction, $reqid, $id, "SSH_FXP_FSETSTAT");
my $attrs = &sftp_parse_attrs($data);
printf " \"%s\" %s", &stringescape($handle), $attrs;
print "\n";
},
#define SSH_FXP_OPENDIR 11 /* 0xb */
0xb => sub {
my ($chan, $index, $direction, $id, $data) = @_;
my ($reqid, $path) = &parse("us", $data);
&sftp_logreq($chan, $direction, $reqid, $id, "SSH_FXP_OPENDIR");
printf " \"%s\"", $path;
print "\n";
},
#define SSH_FXP_READDIR 12 /* 0xc */
0xc => sub {
my ($chan, $index, $direction, $id, $data) = @_;
my ($reqid, $handle) = &parse("us", $data);
&sftp_logreq($chan, $direction, $reqid, $id, "SSH_FXP_READDIR");
printf " \"%s\"", &stringescape($handle);
print "\n";
},
#define SSH_FXP_REMOVE 13 /* 0xd */
0xd => sub {
my ($chan, $index, $direction, $id, $data) = @_;
my ($reqid, $path) = &parse("us", $data);
&sftp_logreq($chan, $direction, $reqid, $id, "SSH_FXP_REMOVE");
printf " \"%s\"", $path;
print "\n";
},
#define SSH_FXP_MKDIR 14 /* 0xe */
0xe => sub {
my ($chan, $index, $direction, $id, $data) = @_;
my ($reqid, $path) = &parse("us", $data);
&sftp_logreq($chan, $direction, $reqid, $id, "SSH_FXP_MKDIR");
printf " \"%s\"", $path;
print "\n";
},
#define SSH_FXP_RMDIR 15 /* 0xf */
0xf => sub {
my ($chan, $index, $direction, $id, $data) = @_;
my ($reqid, $path) = &parse("us", $data);
&sftp_logreq($chan, $direction, $reqid, $id, "SSH_FXP_RMDIR");
printf " \"%s\"", $path;
print "\n";
},
#define SSH_FXP_REALPATH 16 /* 0x10 */
0x10 => sub {
my ($chan, $index, $direction, $id, $data) = @_;
my ($reqid, $path) = &parse("us", $data);
&sftp_logreq($chan, $direction, $reqid, $id, "SSH_FXP_REALPATH");
printf " \"%s\"", $path;
print "\n";
},
#define SSH_FXP_STAT 17 /* 0x11 */
0x11 => sub {
my ($chan, $index, $direction, $id, $data) = @_;
my ($reqid, $path) = &parse("us", $data);
&sftp_logreq($chan, $direction, $reqid, $id, "SSH_FXP_STAT");
printf " \"%s\"", $path;
print "\n";
},
#define SSH_FXP_RENAME 18 /* 0x12 */
0x12 => sub {
my ($chan, $index, $direction, $id, $data) = @_;
my ($reqid, $srcpath, $dstpath) = &parse("uss", $data);
&sftp_logreq($chan, $direction, $reqid, $id, "SSH_FXP_RENAME");
printf " \"%s\" \"%s\"", $srcpath, $dstpath;
print "\n";
},
#define SSH_FXP_STATUS 101 /* 0x65 */
0x65 => sub {
my ($chan, $index, $direction, $id, $data) = @_;
my ($reqid, $status) = &parse("uu", $data);
&sftp_logreply($chan, $direction, $reqid, $id, "SSH_FXP_STATUS");
print " ";
if ($status eq "0") { print "SSH_FX_OK"; }
elsif ($status eq "1") { print "SSH_FX_EOF"; }
elsif ($status eq "2") { print "SSH_FX_NO_SUCH_FILE"; }
elsif ($status eq "3") { print "SSH_FX_PERMISSION_DENIED"; }
elsif ($status eq "4") { print "SSH_FX_FAILURE"; }
elsif ($status eq "5") { print "SSH_FX_BAD_MESSAGE"; }
elsif ($status eq "6") { print "SSH_FX_NO_CONNECTION"; }
elsif ($status eq "7") { print "SSH_FX_CONNECTION_LOST"; }
elsif ($status eq "8") { print "SSH_FX_OP_UNSUPPORTED"; }
else { printf "[unknown status %d]", $status; }
print "\n";
},
#define SSH_FXP_HANDLE 102 /* 0x66 */
0x66 => sub {
my ($chan, $index, $direction, $id, $data) = @_;
my ($reqid, $handle) = &parse("us", $data);
&sftp_logreply($chan, $direction, $reqid, $id, "SSH_FXP_HANDLE");
printf " \"%s\"", &stringescape($handle);
print "\n";
},
#define SSH_FXP_DATA 103 /* 0x67 */
0x67 => sub {
my ($chan, $index, $direction, $id, $data) = @_;
my ($reqid, $retdata) = &parse("us", $data);
&sftp_logreply($chan, $direction, $reqid, $id, "SSH_FXP_DATA");
printf " [%d bytes]", length $retdata;
print "\n";
},
#define SSH_FXP_NAME 104 /* 0x68 */
0x68 => sub {
my ($chan, $index, $direction, $id, $data) = @_;
my ($reqid, $count) = &parse("uu", $data);
&sftp_logreply($chan, $direction, $reqid, $id, "SSH_FXP_NAME");
for my $i (1..$count) {
my ($name, $longname) = &parse("ss", $data);
my $attrs = &sftp_parse_attrs($data);
print " [name=\"$name\", longname=\"$longname\", attrs=$attrs]";
}
print "\n";
},
#define SSH_FXP_ATTRS 105 /* 0x69 */
0x69 => sub {
my ($chan, $index, $direction, $id, $data) = @_;
my ($reqid) = &parse("u", $data);
&sftp_logreply($chan, $direction, $reqid, $id, "SSH_FXP_ATTRS");
my $attrs = &sftp_parse_attrs($data);
printf " %s", $attrs;
print "\n";
},
#define SSH_FXP_EXTENDED 200 /* 0xc8 */
0xc8 => sub {
my ($chan, $index, $direction, $id, $data) = @_;
my ($reqid, $type) = &parse("us", $data);
&sftp_logreq($chan, $direction, $reqid, $id, "SSH_FXP_EXTENDED");
printf " \"%s\"", $type;
print "\n";
},
#define SSH_FXP_EXTENDED_REPLY 201 /* 0xc9 */
0xc9 => sub {
my ($chan, $index, $direction, $id, $data) = @_;
my ($reqid) = &parse("u", $data);
print "\n";
&sftp_logreply($chan, $direction, $reqid,$id,"SSH_FXP_EXTENDED_REPLY");
},
);
for my $type (keys %verbose_packet) {
if (!defined $verbose_packet_dump_functions{$type}) {
die "no verbose dump available for packet type $type\n";
}
}
my ($direction, $seq, $ourseq, $type, $data, $recording);
my %ourseqs = ('i'=>0, 'o'=>0);
$recording = 0;
while (<<>>) {
if ($recording) {
if (/^ [0-9a-fA-F]{8} ((?:[0-9a-fA-F]{2} )*[0-9a-fA-F]{2})/) {
push @$data, map { $_ eq "XX" ? -1 : hex $_ } split / /, $1;
} else {
$recording = 0;
my $fullseq = "$direction$ourseq";
print "$fullseq: $type ";
my ($verbose_dump, $verbose_data) = undef;
if (defined $verbose_packet_dump_functions{$type} &&
($verbose_all || defined $verbose_packet{$type})) {
$verbose_dump = $verbose_packet_dump_functions{$type};
$verbose_data = [ @$data ];
}
if (defined $packets{$type}) {
$packets{$type}->($direction, $fullseq, $data);
} else {
printf "raw %s\n", join "", map { sprintf "%02x", $_ } @$data;
}
if (defined $verbose_dump) {
$verbose_dump->($verbose_data);
if (@$verbose_data) {
printf(" trailing bytes: %s\n",
unpack "H*", pack "C*", @$verbose_data);
}
}
}
}
if (/^(Incoming|Outgoing) packet #0x([0-9a-fA-F]+), type \d+ \/ 0x[0-9a-fA-F]+ \((.*)\)/) {
$direction = ($1 eq "Incoming" ? 'i' : 'o');
# $seq is the sequence number quoted in the log file. $ourseq
# is our own count of the sequence number, which differs in
# that it shouldn't wrap at 2^32, should anyone manage to run
# this script over such a huge log file.
$seq = hex $2;
$ourseq = $ourseqs{$direction}++;
$type = $3;
$data = [];
$recording = 1;
}
if ($pass_through_events && m/^Event Log: ([^\n]*)$/) {
printf "event: $1\n";
}
}
if ($dumpchannels) {
my %stateorder = ('closed'=>0, 'rejected'=>1,
'halfclosed'=>2, 'open'=>3, 'halfopen'=>4);
for my $index (0..$#channels) {
my $chan = $channels[$index];
my $so = $stateorder{$chan->{'state'}};
$so = 1000 unless defined $so; # any state I've missed above comes last
$chan->{'index'} = sprintf "ch%d", $index;
$chan->{'order'} = sprintf "%08d %08d", $so, $index;
}
my @sortedchannels = sort { $a->{'order'} cmp $b->{'order'} } @channels;
for my $chan (@sortedchannels) {
printf "%s (%s): %s\n", $chan->{'index'}, $chan->{'id'}, $chan->{'state'};
}
}
sub format_unsigned_hex_integer {
my $abs = join "", map { sprintf "%02x", $_ } @_;
$abs =~ s!^0*!!g;
$abs = "0" if $abs eq "";
return "0x" . $abs;
}
sub parseone {
my ($type, $data) = @_;
if ($type eq "u") { # uint32
my @bytes = splice @$data, 0, 4;
return "<missing>" if @bytes < 4 or grep { $_<0 } @bytes;
return unpack "N", pack "C*", @bytes;
} elsif ($type eq "U") { # uint64
my @bytes = splice @$data, 0, 8;
return "<missing>" if @bytes < 8 or grep { $_<0 } @bytes;
my @words = unpack "NN", pack "C*", @bytes;
return ($words[0] << 32) + $words[1];
} elsif ($type eq "b") { # boolean
my $byte = shift @$data;
return "<missing>" if !defined $byte or $byte < 0;
return $byte ? "yes" : "no";
} elsif ($type eq "B") { # byte
my $byte = shift @$data;
return "<missing>" if !defined $byte or $byte < 0;
return $byte;
} elsif ($type eq "s" or $type eq "m") { # string, mpint
my @bytes = splice @$data, 0, 4;
return "<missing>" if @bytes < 4 or grep { $_<0 } @bytes;
my $len = unpack "N", pack "C*", @bytes;
@bytes = splice @$data, 0, $len;
return "<missing>" if @bytes < $len or grep { $_<0 } @bytes;
if ($type eq "m") {
my $str = "";
if ($bytes[0] >= 128) {
# Take two's complement.
@bytes = map { 0xFF ^ $_ } @bytes;
for my $i (reverse 0..$#bytes) {
if ($bytes[$i] < 0xFF) {
$bytes[$i]++;
last;
} else {
$bytes[$i] = 0;
}
}
$str = "-";
}
$str .= &format_unsigned_hex_integer(@bytes);
return $str;
} else {
return pack "C*", @bytes;
}
}
}
sub parse {
my ($template, $data) = @_;
return map { &parseone($_, $data) } split //, $template;
}
sub str {
# Quote as a string. If I get enthusiastic I might arrange for
# strange characters inside the string to be quoted.
my $str = shift @_;
return "'$str'";
}
sub sftp_setup {
my $index = shift @_;
my $chan = $channels[$index];
$chan->{'obuf'} = $chan->{'ibuf'} = '';
$chan->{'ocnt'} = $chan->{'icnt'} = 0;
$chan->{'odata'} = $chan->{'idata'} = \&sftp_data;
$chan->{'sftpreqs'} = {};
}
sub sftp_data {
my ($chan, $index, $direction, $data) = @_;
my $buf = \$chan->{$direction."buf"};
my $cnt = \$chan->{$direction."cnt"};
$$buf .= $data;
while (length $$buf >= 4) {
my $msglen = unpack "N", $$buf;
last if length $$buf < 4 + $msglen;
my $msg = substr $$buf, 4, $msglen;
$$buf = substr $$buf, 4 + $msglen;
$msg = [unpack "C*", $msg];
my $type = shift @$msg;
my $id = sprintf "ch%d_sftp_%s%d", $index, $direction, ${$cnt}++;
print "$id: ";
if (defined $sftp_packets{$type}) {
$sftp_packets{$type}->($chan, $index, $direction, $id, $msg);
} else {
printf "unknown SFTP packet type %d\n", $type;
}
}
}
sub sftp_logreq {
my ($chan, $direction, $reqid, $id, $name) = @_;
print "$name";
if ($direction eq "o") { # requests coming _in_ are too weird to track
$chan->{'sftpreqs'}->{$reqid} = $id;
}
}
sub sftp_logreply {
my ($chan, $direction, $reqid, $id, $name) = @_;
print "$name";
if ($direction eq "i") { # replies going _out_ are too weird to track
if (defined $chan->{'sftpreqs'}->{$reqid}) {
print " to ", $chan->{'sftpreqs'}->{$reqid};
$chan->{'sftpreqs'}->{$reqid} = undef;
}
}
}
sub sftp_parse_attrs {
my ($data) = @_;
my ($flags) = &parse("u", $data);
return $flags if $flags eq "<missing>";
my $out = "{";
my $sep = "";
if ($flags & 0x00000001) { # SSH_FILEXFER_ATTR_SIZE
$out .= $sep . sprintf "size=%d", &parse("U", $data);
$sep = ", ";
}
if ($flags & 0x00000002) { # SSH_FILEXFER_ATTR_UIDGID
$out .= $sep . sprintf "uid=%d", &parse("u", $data);
$out .= $sep . sprintf "gid=%d", &parse("u", $data);
$sep = ", ";
}
if ($flags & 0x00000004) { # SSH_FILEXFER_ATTR_PERMISSIONS
$out .= $sep . sprintf "perms=%#o", &parse("u", $data);
$sep = ", ";
}
if ($flags & 0x00000008) { # SSH_FILEXFER_ATTR_ACMODTIME
$out .= $sep . sprintf "atime=%d", &parse("u", $data);
$out .= $sep . sprintf "mtime=%d", &parse("u", $data);
$sep = ", ";
}
if ($flags & 0x80000000) { # SSH_FILEXFER_ATTR_EXTENDED
my $extcount = &parse("u", $data);
while ($extcount-- > 0) {
$out .= $sep . sprintf "\"%s\"=\"%s\"", &parse("ss", $data);
$sep = ", ";
}
}
$out .= "}";
return $out;
}
sub parse_public_key {
my ($blob) = @_;
my $data = [ unpack "C*", $blob ];
my @toret;
my ($type) = &parse("s", $data);
push @toret, $type;
if ($type eq "ssh-rsa") {
my ($e, $n) = &parse("mm", $data);
push @toret, "e", $e, "n", $n;
} elsif ($type eq "ssh-dss") {
my ($p, $q, $g, $y) = &parse("mmmm", $data);
push @toret, "p", $p, "q", $q, "g", $g, "y", $y;
} elsif ($type eq "ssh-ed25519") {
my ($xyblob) = &parse("s", $data);
my @y = unpack "C*", $xyblob;
push @toret, "hibit(x)", $y[$#y] & 1;
$y[$#y] &= ~1;
push @toret, "y & ~1", &format_unsigned_hex_integer(@y);
} elsif ($type =~ m!^ecdsa-sha2-nistp(256|384|521)$!) {
my ($curvename, $blob) = &parse("ss", $data);
push @toret, "curve name", $curvename;
my @blobdata = unpack "C*", $blob;
my ($fmt) = &parse("B", \@blobdata);
push @toret, "format byte", $fmt;
if ($fmt == 4) {
push @toret, "x", &format_unsigned_hex_integer(
@blobdata[0..($#blobdata+1)/2-1]);
push @toret, "y", &format_unsigned_hex_integer(
@blobdata[($#blobdata+1)/2..$#blobdata]);
}
} else {
push @toret, "undecoded data", unpack "H*", pack "C*", @$data;
}
return @toret;
};
sub parse_signature {
my ($blob, $keytype) = @_;
my $data = [ unpack "C*", $blob ];
my @toret;
if ($keytype eq "ssh-rsa") {
my ($type, $s) = &parse("ss", $data);
push @toret, "sig type", $type;
push @toret, "s", &format_unsigned_hex_integer(unpack "C*", $s);
} elsif ($keytype eq "ssh-dss") {
my ($type, $subblob) = &parse("ss", $data);
push @toret, "sig type", $type;
push @toret, "r", &format_unsigned_hex_integer(
unpack "C*", substr($subblob, 0, 20));
push @toret, "s", &format_unsigned_hex_integer(
unpack "C*", substr($subblob, 20, 40));
} elsif ($keytype eq "ssh-ed25519") {
my ($type, $rsblob) = &parse("ss", $data);
push @toret, "sig type", $type;
my @ry = unpack "C*", $rsblob;
my @sy = splice @ry, 32, 32;
push @toret, "hibit(r.x)", $ry[$#ry] & 1;
$ry[$#ry] &= ~1;
push @toret, "r.y & ~1", &format_unsigned_hex_integer(@ry);
push @toret, "hibit(s.x)", $sy[$#sy] & 1;
$sy[$#sy] &= ~1;
push @toret, "s.y & ~1", &format_unsigned_hex_integer(@sy);
} elsif ($keytype =~ m!^ecdsa-sha2-nistp(256|384|521)$!) {
my ($sigtype, $subblob) = &parse("ss", $data);
push @toret, "sig type", $sigtype;
my @sbdata = unpack "C*", $subblob;
my ($r, $s) = &parse("mm", \@sbdata);
push @toret, "r", $r, "s", $s;
} else {
push @toret, "undecoded data", unpack "H*", pack "C*", @$data;
}
return @toret;
};
sub stringescape {
my ($str) = @_;
$str =~ s!\\!\\\\!g;
$str =~ s![^ -~]!sprintf "\\x%02X", ord $&!eg;
return $str;
}