Sha256: 5ebe9b9de15c448466ce7d861e6e41d14da69b788bf01e6ab89984188d69cc8c
Contents?: true
Size: 1.75 KB
Versions: 13
Compression:
Stored size: 1.75 KB
Contents
module RubySMB
class Client
# Contains the methods for handling packet signing
module Signing
# The NTLM Session Key used for signing
# @!attribute [rw] session_key
# @return [String]
attr_accessor :session_key
# Take an SMB1 packet and checks to see if it should be signed.
# If signing is enabled and we have a session key already, then
# it will sign the packet appropriately.
#
# @param packet [RubySMB::GenericPacket] the packet to sign
# @return [RubySMB::GenericPacket] the packet, signed if needed
def smb1_sign(packet)
if signing_required && !session_key.empty?
# Pack the Sequence counter into a int64le
packed_sequence_counter = [sequence_counter].pack('Q<')
packet.smb_header.security_features = packed_sequence_counter
signature = OpenSSL::Digest::MD5.digest(session_key + packet.to_binary_s)[0, 8]
packet.smb_header.security_features = signature
self.sequence_counter += 1
end
packet
end
# Take an SMB2 packet and checks to see if it should be signed.
# If signing is enabled and we have a session key already, then
# it will sign the packet appropriately.
#
# @param packet [RubySMB::GenericPacket] the packet to sign
# @return [RubySMB::GenericPacket] the packet, signed if needed
def smb2_sign(packet)
if signing_required && !session_key.empty?
packet.smb2_header.flags.signed = 1
packet.smb2_header.signature = "\x00" * 16
hmac = OpenSSL::HMAC.digest(OpenSSL::Digest::SHA256.new, session_key, packet.to_binary_s)
packet.smb2_header.signature = hmac[0, 16]
end
packet
end
end
end
end
Version data entries
13 entries across 13 versions & 1 rubygems