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# SMB Perl library, Copyright (C) 2014-2018 Mikhael Goikhman, migo@cpan.org |
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# |
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# This program 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 3 of the License, or |
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# (at your option) any later version. |
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# |
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# This program is distributed in the hope that it will be useful, |
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# but WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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# GNU General Public License for more details. |
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# |
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# You should have received a copy of the GNU General Public License |
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# along with this program. If not, see . |
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package SMB::v2::Command::SessionSetup; |
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use strict; |
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use warnings; |
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use parent 'SMB::v2::Command'; |
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sub init ($) { |
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$_[0]->set( |
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flags => 0, |
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security_mode => 0, |
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capabilities => 0, |
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prev_session_id => 0, |
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security_buffer => undef, |
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) |
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} |
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sub parse ($$%) { |
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my $self = shift; |
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my $parser = shift; |
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if ($self->is_response) { |
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$parser->uint16; # session flags |
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my $offset = $parser->uint16; |
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my $length = $parser->uint16; |
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$self->security_buffer($parser->bytes($length)); |
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} else { |
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$self->flags($parser->uint8); |
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$self->security_mode($parser->uint8); |
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$self->capabilities($parser->uint32); |
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$parser->uint32; # channel |
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my $offset = $parser->uint16; |
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my $length = $parser->uint16; |
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$self->prev_session_id($parser->uint64); |
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$self->security_buffer($parser->bytes($length)); |
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} |
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return $self; |
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} |
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sub prepare_response ($) { |
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my $self = shift; |
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$self->SUPER::prepare_response; |
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my $more_processing = $self->security_buffer && length($self->security_buffer) > 70; |
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$self->set_status(SMB::STATUS_MORE_PROCESSING_REQUIRED) if $more_processing; |
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$self->header->uid(int(rand(999999)) + 1) unless $self->header->uid; |
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} |
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sub pack ($$) { |
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my $self = shift; |
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my $packer = shift; |
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my $security_buffer = $self->security_buffer; |
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if ($self->is_response) { |
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$security_buffer |
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or return $self->abort_pack($packer, SMB::STATUS_LOGON_FAILURE); |
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$packer |
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->uint16(0) # session flags |
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->uint16($packer->diff('smb-header') + 4) |
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->uint16(length $security_buffer) |
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->bytes ($security_buffer) |
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; |
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} else { |
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$security_buffer |
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or die "No security_buffer"; |
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$packer |
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->uint8 ($self->flags) |
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->uint8 ($self->security_mode) |
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->uint32($self->capabilities) |
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->uint32(0) # channel |
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->uint16($packer->diff('smb-header') + 12) |
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->uint16(length $security_buffer) |
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->uint64($self->prev_session_id) |
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->bytes ($security_buffer) |
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; |
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} |
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} |
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1; |