Sha256: 6b4328128369e251e5f2a6a79ac6ecdec790c1fdd051878a11b6b850a4987df7
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Versions: 36
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Contents
# Copyright 2016 Matt Wrock <matt@mattwrock.com>
#
# Licensed under the Apache License, Version 2.0 (the 'License');
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an 'AS IS' BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
require_relative 'fragment'
module WinRM
# PowerShell Remoting Protcol module
module PSRP
# PowerShell Remoting Protocol message fragmenter.
class MessageDefragmenter
def initialize
@messages = {}
end
def defragment(base64_bytes)
fragment = fragment_from(Base64.decode64(base64_bytes))
@messages[fragment.object_id] ||= []
@messages[fragment.object_id].push fragment
# rubocop:disable Style/GuardClause
if fragment.end_fragment
blob = []
@messages.delete(fragment.object_id).each { |frag| blob += frag.blob }
return message_from(blob.pack('C*'))
end
# rubocop:enable Style/GuardClause
end
def fragment_from(byte_string)
Fragment.new(
byte_string[0..7].reverse.unpack('Q')[0],
byte_string[21..-1].bytes,
byte_string[8..15].reverse.unpack('Q')[0],
byte_string[16].unpack('C')[0][0] == 1,
byte_string[16].unpack('C')[0][1] == 1
)
end
def message_from(byte_string)
Message.new(
'00000000-0000-0000-0000-000000000000',
byte_string[4..7].unpack('V')[0],
byte_string[40..-1],
'00000000-0000-0000-0000-000000000000',
byte_string[0..3].unpack('V')[0]
)
end
end
end
end
Version data entries
36 entries across 27 versions & 3 rubygems