Sha256: d65dd3c93279c5d7acb7cbb552b307a75c66b6d3521a2350b72b908b9c2cec9c
Contents?: true
Size: 1.84 KB
Versions: 10
Compression:
Stored size: 1.84 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 self.signing_required && !self.session_key.empty?
# Pack the Sequence counter into a int64le
packed_sequence_counter = [self.sequence_counter].pack('Q<')
packet.smb_header.security_features = packed_sequence_counter
signature = OpenSSL::Digest::MD5.digest(self.session_key + packet.to_binary_s)[0,8]
packet.smb_header.security_features = signature
self.sequence_counter += 1
packet
else
packet
end
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 self.signing_required && !self.session_key.empty?
packet.smb2_header.flags.signed = 1
packet.smb2_header.signature = "\x00" * 16
hmac = OpenSSL::HMAC.digest(OpenSSL::Digest::SHA256.new, self.session_key, packet.to_binary_s)
packet.smb2_header.signature = hmac[0,16]
packet
else
packet
end
end
end
end
end
Version data entries
10 entries across 10 versions & 1 rubygems