Class: Rex::Proto::Kerberos::CredentialCache::Krb5CcachePresenter

Inherits:
Object
  • Object
show all
Defined in:
lib/rex/proto/kerberos/credential_cache/krb5_ccache_presenter.rb

Overview

Formats Kerberos credential cache objects for console and trace output.

Constant Summary collapse

TRACE_MODE_METADATA = 
'metadata'
TRACE_MODE_TICKET = 
'ticket'
TRACE_MODE_FULL = 
'full'
TRACE_MODES = 
[
  TRACE_MODE_METADATA,
  TRACE_MODE_TICKET,
  TRACE_MODE_FULL
].freeze

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(ccache) ⇒ Krb5CcachePresenter

Returns a new instance of Krb5CcachePresenter.

Parameters:



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# File 'lib/rex/proto/kerberos/credential_cache/krb5_ccache_presenter.rb', line 50

def initialize(ccache)
  @ccache = ccache
end

Instance Attribute Details

#ccache ⇒ Rex::Proto::Kerberos::CredentialCache::Krb5Ccache (readonly)

Returns:



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# File 'lib/rex/proto/kerberos/credential_cache/krb5_ccache_presenter.rb', line 92

def ccache
  @ccache
end

Instance Method Details

#present(key: nil, trace_mode: TRACE_MODE_FULL) ⇒ String

Returns A human readable representation of a ccache object.

Parameters:

  • key (String, nil) (defaults to: nil) —

    Decryption key for the encrypted part

Returns:

  • (String) —

    A human readable representation of a ccache object



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# File 'lib/rex/proto/kerberos/credential_cache/krb5_ccache_presenter.rb', line 56

def present(key: nil, trace_mode: TRACE_MODE_FULL)
  output = []
  output << "Primary Principal: #{ccache.default_principal}"
  output << "Ccache version: #{ccache.version}"
  output << ''
  output << present_credentials(ccache.credentials, key: key, trace_mode: trace_mode)
  output.join("\n")
end

#present_checksum(header:, signature:) ⇒ String

Returns A human readable representation of a Checksum.

Parameters:

  • header (String)
  • signature (String)

Returns:

  • (String) —

    A human readable representation of a Checksum



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# File 'lib/rex/proto/kerberos/credential_cache/krb5_ccache_presenter.rb', line 335

def present_checksum(header:, signature:)
  sig = signature.bytes.map { |x| x.to_s(16).rjust(2, '0').to_s }.join
  "#{header}\n" +
    "Signature: #{sig}".indent(2)
end

#present_client_info(client_info) ⇒ String

Returns A human readable representation of a Client Info.

Parameters:

Returns:

  • (String) —

    A human readable representation of a Client Info



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# File 'lib/rex/proto/kerberos/credential_cache/krb5_ccache_presenter.rb', line 324

def present_client_info(client_info)
  output = []
  output << 'Client Info:'
  output << "Name: '#{client_info.name.encode('utf-8')}'".indent(2)
  output << "Client ID: #{present_ndr_file_time(client_info.client_id)}".indent(2)
  output.join("\n")
end

#present_cred(cred, key: nil, trace_mode: TRACE_MODE_FULL) ⇒ String

Returns A human readable representation of a ccache credential.

Parameters:

Returns:

  • (String) —

    A human readable representation of a ccache credential



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# File 'lib/rex/proto/kerberos/credential_cache/krb5_ccache_presenter.rb', line 98

def present_cred(cred, key: nil, trace_mode: TRACE_MODE_FULL)
  return present_cred_metadata(cred) if trace_mode == TRACE_MODE_METADATA

  output = []
  output << "Server: #{cred.server}"
  output << "Client: #{cred.client}"
  output << "Ticket etype: #{cred.keyblock.enctype} (#{Rex::Proto::Kerberos::Crypto::Encryption.const_name(cred.keyblock.enctype)})"
  output << "Key: #{cred.keyblock.data.unpack1('H*')}"
  output << "Subkey: #{cred.is_skey == 1}"
  output << "Ticket Length: #{cred.ticket.length}"
  output << "Ticket Flags: 0x#{cred.ticket_flags.to_i.to_s(16).rjust(8, '0')} (#{Rex::Proto::Kerberos::Model::KdcOptionFlags.new(cred.ticket_flags.to_i).enabled_flag_names.join(', ')})"
  ticket = Rex::Proto::Kerberos::Model::Ticket.decode(cred.ticket.value)

  output << "Addresses: #{cred.address_count}"

  unless cred.address_count == 0
    output << cred.addresses.map do |address|
      "#{ADDRESS_TYPE_MAP.fetch(address.addrtype, address.addrtype)}: #{address.data}".indent(2)
    end.join("\n")
  end

  output << "Authdatas: #{cred.authdata_count}"
  unless cred.authdata_count == 0
    output << cred.authdatas.map do |authdata|
      "#{AD_TYPE_MAP.fetch(authdata.adtype, authdata.adtype)}: #{authdata.data}".indent(2)
    end.join("\n")
  end

  output << 'Times:'
  output << "Auth time: #{present_time(cred.authtime)}".indent(2)
  output << "Start time: #{present_time(cred.starttime)}".indent(2)
  output << "End time: #{present_time(cred.endtime)}".indent(2)
  output << "Renew Till: #{present_time(cred.renew_till)}".indent(2)

  output << 'Ticket:'
  output << "Ticket Version Number: #{ticket.tkt_vno}".indent(2)
  output << "Realm: #{ticket.realm}".indent(2)
  output << "Server Name: #{ticket.sname}".indent(2)
  output << 'Encrypted Ticket Part:'.indent(2)
  output << "Ticket etype: #{ticket.enc_part.etype} (#{Rex::Proto::Kerberos::Crypto::Encryption.const_name(ticket.enc_part.etype)})".indent(4)
  output << "Key Version Number: #{ticket.enc_part.kvno}".indent(4)

  if key.blank?
    output << 'Cipher:'.indent(4)
    output << Base64.strict_encode64(ticket.enc_part.cipher).indent(6)
  else
    output << "Decrypted (with key: #{key.bytes.map { |x| x.to_s(16).rjust(2, '0').to_s }.join}):".indent(4)
    output << present_encrypted_ticket_part(ticket, key).indent(6)
  end

  output.join("\n")
end

#present_cred_metadata(cred) ⇒ String

Returns A metadata-only representation of a ccache credential.

Parameters:

Returns:

  • (String) —

    A metadata-only representation of a ccache credential



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# File 'lib/rex/proto/kerberos/credential_cache/krb5_ccache_presenter.rb', line 153

def present_cred_metadata(cred)
  ticket_flags = cred.ticket_flags.to_i
  output = []

  output << "Server: #{cred.server}"
  output << "Client: #{cred.client}"
  output << "Ticket etype: #{cred.keyblock.enctype} (#{Rex::Proto::Kerberos::Crypto::Encryption.const_name(cred.keyblock.enctype)})"
  output << "Subkey: #{cred.is_skey == 1}"
  output << "Ticket Length: #{cred.ticket.length}"
  output << "Ticket Flags: 0x#{ticket_flags.to_s(16).rjust(8, '0')} (#{Rex::Proto::Kerberos::Model::KdcOptionFlags.new(ticket_flags).enabled_flag_names.join(', ')})"
  output << "Addresses: #{cred.address_count}"
  output << "Authdatas: #{cred.authdata_count}"
  output << 'Times:'
  output << "Auth time: #{present_time(cred.authtime)}".indent(2)
  output << "Start time: #{present_time(cred.starttime)}".indent(2)
  output << "End time: #{present_time(cred.endtime)}".indent(2)
  output << "Renew Till: #{present_time(cred.renew_till)}".indent(2)

  output.join("\n")
end

#present_credential_info(credential_info) ⇒ Object 



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# File 'lib/rex/proto/kerberos/credential_cache/krb5_ccache_presenter.rb', line 311

def present_credential_info(credential_info)
  output = []

  output << 'Credential Information:'
  output << "Version: #{credential_info.version}".indent(2)
  output << "Encryption Type: #{credential_info.encryption_type} (#{Rex::Proto::Kerberos::Crypto::Encryption.const_name(credential_info.encryption_type)})".indent(2)
  output << "Serialized Data: #{credential_info.serialized_data.map { |x| x.to_i.to_s(16).rjust(2, '0').to_s }.join}".indent(2)

  output.join("\n")
end

#present_credentials(credentials, key: nil, trace_mode: TRACE_MODE_FULL) ⇒ String

Returns A human readable representation of ccache credentials.

Parameters:

Returns:

  • (String) —

    A human readable representation of ccache credentials



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# File 'lib/rex/proto/kerberos/credential_cache/krb5_ccache_presenter.rb', line 82

def present_credentials(credentials, key: nil, trace_mode: TRACE_MODE_FULL)
  output = []
  output << "Creds: #{credentials.length}"
  output << credentials.map.with_index do |cred, index|
    "Credential[#{index}]:\n#{present_cred(cred, key: key, trace_mode: trace_mode).indent(2)}".indent(2)
  end.join("\n")
  output.join("\n")
end

#present_encrypted_ticket_part(ticket, key) ⇒ String

Returns A human readable representation of an Encrypted Ticket Part.

Parameters:

Returns:

  • (String) —

    A human readable representation of an Encrypted Ticket Part



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# File 'lib/rex/proto/kerberos/credential_cache/krb5_ccache_presenter.rb', line 450

def present_encrypted_ticket_part(ticket, key)
  enc_class = Rex::Proto::Kerberos::Crypto::Encryption.from_etype(ticket.enc_part.etype)

  decrypted_part = enc_class.decrypt(ticket.enc_part.cipher, key, 2)
  ticket_enc_part = Rex::Proto::Kerberos::Model::TicketEncPart.decode(decrypted_part)
  output = []
  output << 'Times:'
  output << "Auth time: #{present_time(ticket_enc_part.authtime)}".indent(2)
  output << "Start time: #{present_time(ticket_enc_part.starttime)}".indent(2)
  output << "End time: #{present_time(ticket_enc_part.endtime)}".indent(2)
  output << "Renew Till: #{present_time(ticket_enc_part.renew_till)}".indent(2)

  output << "Client Addresses: #{ticket_enc_part.caddr.to_a.length}"
  unless ticket_enc_part.caddr.to_a.empty?
    output << ticket_enc_part.caddr.to_a.map do |address|
      "#{ADDRESS_TYPE_MAP.fetch(address.type, address.type)}: #{address.address}".indent(2)
    end.join("\n")
  end

  output << "Transited: tr_type: #{ticket_enc_part.transited.tr_type}, Contents: #{ticket_enc_part.transited.contents.inspect}"

  output << "Client Name: '#{ticket_enc_part.cname}'"
  output << "Client Realm: '#{ticket_enc_part.crealm}'"
  output << "Ticket etype: #{ticket_enc_part.key.type} (#{Rex::Proto::Kerberos::Crypto::Encryption.const_name(ticket_enc_part.key.type)})"
  output << "Session Key: #{ticket_enc_part.key.value.unpack1('H*')}"
  output << "Flags: 0x#{ticket_enc_part.flags.to_i.to_s(16).rjust(8, '0')} (#{ticket_enc_part.flags.enabled_flag_names.join(', ')})"

  auth_data_data = ticket_enc_part.authorization_data.elements.first[:data]

  pac_string = OpenSSL::ASN1.decode(auth_data_data).value[0].value[1].value[0].value

  pac = Rex::Proto::Kerberos::Pac::Krb5Pac.read(pac_string)
  output << 'PAC:'
  output << pac.pac_info_buffers.map do |pac_info_buffer|
    present_pac_info_buffer(pac_info_buffer).indent(2)
  end
  output.join("\n")
end

#present_full_pac_checksum(full_pac_checksum) ⇒ String

Returns A human readable representation of a Full Pac Checksum.

Parameters:

Returns:

  • (String) —

    A human readable representation of a Full Pac Checksum



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# File 'lib/rex/proto/kerberos/credential_cache/krb5_ccache_presenter.rb', line 370

def present_full_pac_checksum(full_pac_checksum)
  signature = full_pac_checksum.signature
  header = 'Full Pac Checksum:'

  present_checksum(header: header, signature: signature)
end

#present_logon_info(logon_info) ⇒ String

Returns A human readable representation of a Logon Information.

Parameters:

Returns:

  • (String) —

    A human readable representation of a Logon Information



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# File 'lib/rex/proto/kerberos/credential_cache/krb5_ccache_presenter.rb', line 264

def present_logon_info(logon_info)
  validation_info = logon_info.data
  output = []
  output << 'Validation Info:'

  output << "Logon Time: #{present_ndr_file_time(validation_info.logon_time)}".indent(2)
  output << "Logoff Time: #{present_ndr_file_time(validation_info.logoff_time)}".indent(2)
  output << "Kick Off Time: #{present_ndr_file_time(validation_info.kick_off_time)}".indent(2)
  output << "Password Last Set: #{present_ndr_file_time(validation_info.password_last_set)}".indent(2)
  output << "Password Can Change: #{present_ndr_file_time(validation_info.password_can_change)}".indent(2)
  output << "Password Must Change: #{present_ndr_file_time(validation_info.password_must_change)}".indent(2)

  output << "Logon Count: #{validation_info.logon_count}".indent(2)
  output << "Bad Password Count: #{validation_info.bad_password_count}".indent(2)
  output << "User ID: #{validation_info.user_id}".indent(2)
  output << "Primary Group ID: #{validation_info.primary_group_id}".indent(2)
  output << print_user_flags(validation_info.user_flags)
  output << "User Session Key: #{present_user_session_key(validation_info.user_session_key)}".indent(2)
  output << (validation_info.)
  output << "Sub Auth Status: #{validation_info.sub_auth_status}".indent(2)

  output << "Last Successful Interactive Logon: #{present_ndr_file_time(validation_info.last_successful_i_logon)}".indent(2)
  output << "Last Failed Interactive Logon: #{present_ndr_file_time(validation_info.last_failed_i_logon)}".indent(2)
  output << "Failed Interactive Logon Count: #{validation_info.failed_i_logon_count}".indent(2)

  output << "Extra SID Count: #{validation_info.sid_count}".indent(2)
  output << validation_info.extra_sids.map { |extra_sid| "SID: #{extra_sid.sid}, Attributes: #{extra_sid.attributes}".indent(4) } if validation_info.extra_sids.any?
  output << "Resource Group Count: #{validation_info.resource_group_count}".indent(2)

  output << "Group Count: #{validation_info.group_count}".indent(2)
  output << 'Group IDs:'.indent(2)
  output << print_group_memberships(validation_info.group_memberships)

  output << "Logon Domain ID: #{validation_info.logon_domain_id}".indent(2)

  output << "Effective Name: #{present_rpc_unicode_string(validation_info.effective_name)}".indent(2)
  output << "Full Name: #{present_rpc_unicode_string(validation_info.full_name)}".indent(2)
  output << "Logon Script: #{present_rpc_unicode_string(validation_info.logon_script)}".indent(2)
  output << "Profile Path: #{present_rpc_unicode_string(validation_info.profile_path)}".indent(2)
  output << "Home Directory: #{present_rpc_unicode_string(validation_info.home_directory)}".indent(2)
  output << "Home Directory Drive: #{present_rpc_unicode_string(validation_info.home_directory_drive)}".indent(2)
  output << "Logon Server: #{present_rpc_unicode_string(validation_info.logon_server)}".indent(2)
  output << "Logon Domain Name: #{present_rpc_unicode_string(validation_info.logon_domain_name)}".indent(2)

  output.join("\n")
end

#present_ndr_file_time(time) ⇒ String

Returns A human readable representation of the time.

Parameters:

  • time (RubySMB::Dcerpc::Ndr::NdrFileTime)

Returns:

  • (String) —

    A human readable representation of the time



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# File 'lib/rex/proto/kerberos/credential_cache/krb5_ccache_presenter.rb', line 507

def present_ndr_file_time(time)
  if time.get == Rex::Proto::Kerberos::Pac::NEVER_EXPIRE
    'Never Expires (inf)'
  elsif time.get == 0
    'No Time Set (0)'
  else
    present_time(time.to_time)
  end
end

#present_pac_attributes(pac_attributes) ⇒ Object 



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# File 'lib/rex/proto/kerberos/credential_cache/krb5_ccache_presenter.rb', line 403

def present_pac_attributes(pac_attributes)
  output = []
  output << 'Pac Attributes:'
  output << "Flag length: #{pac_attributes.flags_length}".indent(2)
  output << "Flags: #{pac_attributes.flags}".indent(2)
  attribute_attributes = Rex::Proto::Kerberos::Pac::PacAttributesFlags.read([pac_attributes.flags].pack('N'))
  output << print_bin_data_model(attribute_attributes, bit_length: 32).to_s.indent(4)
  output.join("\n")
end

#present_pac_info_buffer(info_buffer) ⇒ String

Returns A human readable representation of a Pac Info Buffer.

Parameters:

Returns:

  • (String) —

    A human readable representation of a Pac Info Buffer



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# File 'lib/rex/proto/kerberos/credential_cache/krb5_ccache_presenter.rb', line 415

def present_pac_info_buffer(info_buffer)
  ul_type = info_buffer.ul_type.to_i
  pac_element = info_buffer.buffer.pac_element
  case ul_type
  when Rex::Proto::Kerberos::Pac::Krb5PacElementType::LOGON_INFORMATION
    present_logon_info(pac_element)
  when Rex::Proto::Kerberos::Pac::Krb5PacElementType::CREDENTIAL_INFORMATION
    present_credential_info(pac_element)
  when Rex::Proto::Kerberos::Pac::Krb5PacElementType::CLIENT_INFORMATION
    present_client_info(pac_element)
  when Rex::Proto::Kerberos::Pac::Krb5PacElementType::SERVER_CHECKSUM
    present_server_checksum(pac_element)
  when Rex::Proto::Kerberos::Pac::Krb5PacElementType::PRIVILEGE_SERVER_CHECKSUM
    present_priv_server_checksum(pac_element)
  when Rex::Proto::Kerberos::Pac::Krb5PacElementType::USER_PRINCIPAL_NAME_AND_DNS_INFORMATION
    present_upn_and_dns_information(pac_element)
  when Rex::Proto::Kerberos::Pac::Krb5PacElementType::PAC_REQUESTOR
    present_pac_requestor(pac_element)
  when Rex::Proto::Kerberos::Pac::Krb5PacElementType::PAC_ATTRIBUTES
    present_pac_attributes(pac_element)
  when Rex::Proto::Kerberos::Pac::Krb5PacElementType::TICKET_CHECKSUM
    present_ticket_checksum(pac_element)
  when Rex::Proto::Kerberos::Pac::Krb5PacElementType::FULL_PAC_CHECKSUM
    present_full_pac_checksum(pac_element)
  else
    ul_type_name = Rex::Proto::Kerberos::Pac::Krb5PacElementType.const_name(ul_type)
    ul_type_name = ul_type_name.gsub('_', ' ').capitalize if ul_type_name
    "#{ul_type_name || "Unknown ul type #{ul_type}"}:\n" +
      info_buffer.to_s.indent(2)
  end
end

#present_pac_requestor(pac_requestor) ⇒ Object 



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# File 'lib/rex/proto/kerberos/credential_cache/krb5_ccache_presenter.rb', line 396

def present_pac_requestor(pac_requestor)
  output = []
  output << 'Pac Requestor:'
  output << "SID: #{pac_requestor.user_sid}".indent(2)
  output.join("\n")
end

#present_priv_server_checksum(priv_server_checksum) ⇒ String

Returns A human readable representation of a Privilege Server Checksum.

Parameters:

Returns:

  • (String) —

    A human readable representation of a Privilege Server Checksum



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# File 'lib/rex/proto/kerberos/credential_cache/krb5_ccache_presenter.rb', line 352

def present_priv_server_checksum(priv_server_checksum)
  signature = priv_server_checksum.signature
  header = 'Pac Privilege Server Checksum:'

  present_checksum(header: header, signature: signature)
end

#present_rpc_unicode_string(rpc_unicode_string) ⇒ String (frozen)

Parameters:

  • rpc_unicode_string (RubySMB::Dcerpc::RpcUnicodeString)

Returns:

  • (String (frozen)) 


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# File 'lib/rex/proto/kerberos/credential_cache/krb5_ccache_presenter.rb', line 491

def present_rpc_unicode_string(rpc_unicode_string)
  if rpc_unicode_string.buffer.is_null_ptr?
    'nil'
  else
    "'#{rpc_unicode_string.buffer.encode('UTF-8')}'"
  end
end

#present_server_checksum(server_checksum) ⇒ String

Returns A human readable representation of a Server Checksum.

Parameters:

Returns:

  • (String) —

    A human readable representation of a Server Checksum



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# File 'lib/rex/proto/kerberos/credential_cache/krb5_ccache_presenter.rb', line 343

def present_server_checksum(server_checksum)
  signature = server_checksum.signature
  header = 'Pac Server Checksum:'

  present_checksum(header: header, signature: signature)
end

#present_ticket_checksum(ticket_checksum) ⇒ String

Returns A human readable representation of a Ticket Checksum.

Parameters:

Returns:

  • (String) —

    A human readable representation of a Ticket Checksum



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# File 'lib/rex/proto/kerberos/credential_cache/krb5_ccache_presenter.rb', line 361

def present_ticket_checksum(ticket_checksum)
  signature = ticket_checksum.signature
  header = 'Ticket Checksum:'

  present_checksum(header: header, signature: signature)
end

#present_time(time) ⇒ String

Returns A human readable representation of the time in the users timezone.

Parameters:

  • time (Time)

Returns:

  • (String) —

    A human readable representation of the time in the users timezone



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# File 'lib/rex/proto/kerberos/credential_cache/krb5_ccache_presenter.rb', line 519

def present_time(time)
  time.localtime.to_s
end

#present_trace(source: nil, key: nil, trace_mode: TRACE_MODE_FULL) ⇒ String

Returns A human readable representation using Kerberos trace headers.

Parameters:

  • source (String, nil) (defaults to: nil) —

    Source label to include in the trace header

  • key (String, nil) (defaults to: nil) —

    Decryption key for the encrypted part

  • trace_mode (String) (defaults to: TRACE_MODE_FULL) —

    One of metadata, ticket, full

Returns:

  • (String) —

    A human readable representation using Kerberos trace headers



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# File 'lib/rex/proto/kerberos/credential_cache/krb5_ccache_presenter.rb', line 69

def present_trace(source: nil, key: nil, trace_mode: TRACE_MODE_FULL)
  [
    '#' * 20,
    "# Kerberos Credential#{source ? ": #{source}" : ''}",
    '#' * 20,
    present_credentials(ccache.credentials, key: key, trace_mode: trace_mode)
  ].join("\n")
end

#present_upn_and_dns_information(upn_and_dns_info) ⇒ String

Returns A human readable representation of a UPN and DNS information element.

Parameters:

Returns:

  • (String) —

    A human readable representation of a UPN and DNS information element



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# File 'lib/rex/proto/kerberos/credential_cache/krb5_ccache_presenter.rb', line 379

def present_upn_and_dns_information(upn_and_dns_info)
  output = []
  output << 'UPN and DNS Information:'
  output << "UPN: #{upn_and_dns_info.upn.encode('utf-8')}".indent(2)
  output << "DNS Domain Name: #{upn_and_dns_info.dns_domain_name.encode('utf-8')}".indent(2)

  output << "Flags: #{upn_and_dns_info.flags}".indent(2)
  upn_and_dns_info_attributes = Rex::Proto::Kerberos::Pac::UpnDnsInfoAttributes.read([upn_and_dns_info.flags].pack('N'))
  output << print_bin_data_model(upn_and_dns_info_attributes, bit_length: 32).to_s.indent(4)

  if upn_and_dns_info.has_s_flag?
    output << "SAM Name: #{upn_and_dns_info.sam_name.encode('utf-8')}".indent(2)
    output << "SID: #{upn_and_dns_info.sid}".indent(2)
  end
  output.join("\n")
end

#present_user_session_key(user_session_key) ⇒ String

Returns A human readable representation of a User Session Key.

Parameters:

Returns:

  • (String) —

    A human readable representation of a User Session Key



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# File 'lib/rex/proto/kerberos/credential_cache/krb5_ccache_presenter.rb', line 501

def present_user_session_key(user_session_key)
  user_session_key.session_key.flat_map(&:data).map { |x| x.to_i.to_s(16).rjust(2, '0').to_s }.join
end

#print_bin_data_model(model, bit_length: nil) ⇒ String

This method takes a BinData object and parses it to create a formatted output that help users visualise what each flag means as well as if it is set or not

Note: For now we only support bit1 flags from BinData, this could be extended in the future

Example output .… .… .… .… .… .… .… .0.. Flag 29: The flag 29 is NOT SET .… .… .… .… .… .… .… ..1. Flag 30: The flag 30 is SET .… .… .… .… .… .… .… …1 Flag 31: The flag 31 is SET

Parameters:

  • model —

    The BinData object

  • bit_length (Integer, Nil) (defaults to: nil) —

    The length of desired byte output - number of dots in example above

Returns:

  • (String) —

    Formatted output



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# File 'lib/rex/proto/kerberos/credential_cache/krb5_ccache_presenter.rb', line 187

def print_bin_data_model(model, bit_length: nil)
  rows = []

  # i.e. [[:field_name_1,  1], [:field_name_2, 0]]
  fields_and_values = model.to_enum(:each_pair).to_a
  fields = fields_and_values.map { |field, _value| field }
  values = fields_and_values.map { |_field, value| value }

  # For now we only support bit1 flags from BinData, this could be extended in the future
  fields_and_values.each do |field, value|
    unless BIN_DATA_BIT_LENGTHS.keys.include?(value.class)
      raise TypeError, "Unsupported field type #{value.class} for field #{field.inspect} - expected one of #{BIN_DATA_BIT_LENGTHS.keys.join(',')}"
    end
  end

  # calculate the bit length; we can't rely on BinData's `num_bytes` in the scenario of the model being 4 bits wide.
  calculated_bit_length = values.sum { |value| BIN_DATA_BIT_LENGTHS.fetch(value.class) }
  bit_length ||= calculated_bit_length

  if bit_length != calculated_bit_length
    raise ArgumentError, "Not implemented. Bit length(#{bit_length}) should equal the bit length of the model #{calculated_bit_length}"
  end

  padding = Array.new(bit_length - fields.length, :_reserved_)
  flag_keys = padding + fields
  binary_value = values.join

  bit_length.times do |i|
    next if flag_keys[i].start_with?('_reserved_')

    dot_formatting = Array.new(bit_length, '.')
    dot_formatting[(i - 1) - (bit_length - 1)] = binary_value[i]
    buckets = dot_formatting.in_groups_of(4) # Issue if we don't received a multiple of 4
    dot_formatting = buckets.map(&:join).join(' ')

    human_readable_flag_name = flag_keys[i].to_s.split('_').map(&:capitalize).join(' ')
    description = "#{human_readable_flag_name}: The #{flag_keys[i].to_s.upcase} bit is #{binary_value.chars[i] == '1' ? 'SET' : 'NOT SET'}"
    rows << "#{dot_formatting} #{description}"
  end

  rows.join("\n")
end

#print_group_memberships(group_memberships) ⇒ Array

Returns Formatted human readable representation of the group memberships.

Parameters:

  • group_memberships (RubySMB::Dcerpc::Samr::PgroupMembershipArray)

Returns:

  • (Array) —

    Formatted human readable representation of the group memberships



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# File 'lib/rex/proto/kerberos/credential_cache/krb5_ccache_presenter.rb', line 232

def print_group_memberships(group_memberships)
  output = []
  if group_memberships.any?
    group_memberships.map do |group|
      group_attributes = Rex::Proto::Kerberos::Pac::GroupAttributes.read([group.attributes].pack('N'))
      output << "Relative ID: #{group.relative_id}\nAttributes: #{group.attributes}".indent(4)
      output << print_bin_data_model(group_attributes, bit_length: 32).to_s.indent(6)
    end
    output
  end
end

#print_user_account_flags(user_account_flags) ⇒ Array

Returns Formatted human readable representation of the user account flags.

Parameters:

  • user_account_flags (RubySMB::Dcerpc::Ndr::NdrUint32)

Returns:

  • (Array) —

    Formatted human readable representation of the user account flags



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# File 'lib/rex/proto/kerberos/credential_cache/krb5_ccache_presenter.rb', line 255

def ()
  output = []
   = Rex::Proto::Kerberos::Pac::UserAccountAttributes.read([].pack('N'))
  output << "User Account Control: #{}".indent(2)
  output << print_bin_data_model(, bit_length: 32).to_s.indent(4)
end

#print_user_flags(user_flags) ⇒ Array

Returns Formatted human readable representation of the user flags.

Parameters:

  • user_flags (RubySMB::Dcerpc::Ndr::NdrUint32)

Returns:

  • (Array) —

    Formatted human readable representation of the user flags



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# File 'lib/rex/proto/kerberos/credential_cache/krb5_ccache_presenter.rb', line 246

def print_user_flags(user_flags)
  output = []
  user_attributes = Rex::Proto::Kerberos::Pac::UserFlagAttributes.read([user_flags].pack('N'))
  output << "User Flags: #{user_flags}".indent(2)
  output << print_bin_data_model(user_attributes, bit_length: 32).to_s.indent(4)
end