#!/usr/bin/perl
use strict;
use warnings;
use FileHandle;
my $dumpchannels = 0;
my $dumpdata = 0;
while ($ARGV[0] =~ /^-/) {
my $opt = shift @ARGV;
if ($opt eq "--") {
last; # stop processing options
} elsif ($opt eq "-c") {
$dumpchannels = 1;
} elsif ($opt eq "-d") {
$dumpdata = 1;
} else {
die "unrecognised option '$opt'\n";
}
}
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, $data) = @_;
print "\n";
},
#define SSH2_MSG_KEXRSA_PUBKEY 30 /* 0x1e */
'SSH2_MSG_KEXRSA_PUBKEY' => sub {
my ($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, $data) = @_;
print "\n";
},
);
my %sftp_packets = (
#define SSH_FXP_INIT 1 /* 0x1 */
0x1 => sub {
my ($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");
},
);
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 ";
if (defined $packets{$type}) {
$packets{$type}->($direction, $fullseq, $data);
} else {
printf "raw %s\n", join "", map { sprintf "%02x", $_ } @$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 = [];
$recording = 1;
}
}
if ($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'}, $chan->{'state'};
}
}
sub parseone {
my ($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 "mpint") {
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 .= "0x" . join "", map { sprintf "%02x", $_ } @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 $out;
}
sub stringescape {
my ($str) = @_;
$str =~ s!\\!\\\\!g;
$str =~ s![^ -~]!sprintf "\\x%02X", ord $&!eg;
return $str;
}