class Rex::Proto::Kerberos::Model::PreAuthEncTimeStamp
This class is a representation of a PA-ENC-TIMESTAMP, an encrypted timestamp sent as pre authenticated data
Constants
- CRYPTO_MSG_TYPE
Attributes
@!attribute pa_time_stamp
@return [Time] client's time
@!attribute pausec
@return [Fixnum] optional microseconds client's time
Public Instance Methods
Decodes a Rex::Proto::Kerberos::Model::PreAuthEncTimeStamp
@param input [String, OpenSSL::ASN1::Sequence] the input to decode from @return [self] if decoding succeeds @raise [RuntimeError] if decoding doesn't succeed
# File lib/rex/proto/kerberos/model/pre_auth_enc_time_stamp.rb, line 24 def decode(input) case input when String decode_string(input) when OpenSSL::ASN1::Sequence decode_asn1(input) else raise ::RuntimeError, 'Failed to decode PreAuthEncTimeStamp, invalid input' end self end
Encodes a Rex::Proto::Kerberos::Model::PreAuthEncTimeStamp
into an ASN.1 String
@return [String]
# File lib/rex/proto/kerberos/model/pre_auth_enc_time_stamp.rb, line 41 def encode pa_time_stamp_asn1 = OpenSSL::ASN1::ASN1Data.new([encode_pa_time_stamp], 0, :CONTEXT_SPECIFIC) pausec_asn1 = OpenSSL::ASN1::ASN1Data.new([encode_pausec], 1, :CONTEXT_SPECIFIC) seq = OpenSSL::ASN1::Sequence.new([pa_time_stamp_asn1, pausec_asn1]) seq.to_der end
Encrypts the Rex::Proto::Kerberos::Model::PreAuthEncTimeStamp
@param etype [Fixnum] the crypto schema to encrypt @param key [String] the key to encrypt @return [String] the encrypted result @raise [NotImplementedError] if encryption schema isn't supported
# File lib/rex/proto/kerberos/model/pre_auth_enc_time_stamp.rb, line 55 def encrypt(etype, key) data = self.encode res = '' case etype when RC4_HMAC res = encrypt_rc4_hmac(data, key, CRYPTO_MSG_TYPE) else raise ::NotImplementedError, 'EncryptedData schema is not supported' end res end
Private Instance Methods
Decodes a Rex::Proto::Kerberos::Model::PreAuthEncTimeStamp
from an OpenSSL::ASN1::Sequence
@param input [OpenSSL::ASN1::Sequence] the input to decode from
# File lib/rex/proto/kerberos/model/pre_auth_enc_time_stamp.rb, line 101 def decode_asn1(input) self.pa_time_stamp = decode_pa_time_stamp(input.value[0]) self.pausec = decode_pausec(input.value[1]) end
Decodes the decode_pa_time_stamp
from an OpenSSL::ASN1::ASN1Data
@param input [OpenSSL::ASN1::ASN1Data] the input to decode from @return [Boolean]
# File lib/rex/proto/kerberos/model/pre_auth_enc_time_stamp.rb, line 110 def decode_pa_time_stamp(input) input.value[0].value end
Decodes the pausec from an OpenSSL::ASN1::ASN1Data
@param input [OpenSSL::ASN1::ASN1Data] the input to decode from @return [Fixnum]
# File lib/rex/proto/kerberos/model/pre_auth_enc_time_stamp.rb, line 118 def decode_pausec(input) input.value[0].value.to_i end
Decodes a Rex::Proto::Kerberos::Model::PreAuthEncTimeStamp
@param input [String] the input to decode from
# File lib/rex/proto/kerberos/model/pre_auth_enc_time_stamp.rb, line 91 def decode_string(input) asn1 = OpenSSL::ASN1.decode(input) decode_asn1(asn1) end
Encodes the pa_time_stamp
@return [OpenSSL::ASN1::GeneralizedTime]
# File lib/rex/proto/kerberos/model/pre_auth_enc_time_stamp.rb, line 74 def encode_pa_time_stamp OpenSSL::ASN1::GeneralizedTime.new(pa_time_stamp) end
Encodes the pausec
@return [OpenSSL::ASN1::Integer]
# File lib/rex/proto/kerberos/model/pre_auth_enc_time_stamp.rb, line 81 def encode_pausec int_bn = OpenSSL::BN.new(pausec.to_s) int = OpenSSL::ASN1::Integer.new(int_bn) int end