Class: RubyScep::PkiMessage

Inherits:
Object
  • Object
show all
Includes:
OpenSSL::ASN1
Defined in:
lib/ruby_scep/pki_message.rb,
lib/ruby_scep/pki_message/degenerate.rb,
lib/ruby_scep/pki_message/signed_data.rb,
lib/ruby_scep/pki_message/enveloped_data.rb

Defined Under Namespace

Classes: Degenerate, EnvelopedData, SignedData

Constant Summary collapse

OID_MESSAGE_TYPE =

get OID corresponding name oid-info.com/get/<the oid> get possible balues for a given OID in the CMS RFC www.ietf.org/rfc/rfc3369.txt

'2.16.840.1.113733.1.9.2'
OID_PKI_STATUS = 
'2.16.840.1.113733.1.9.3'
OID_FAIL_INFO = 
'2.16.840.1.113733.1.9.4'
OID_SENDER_NONCE = 
'2.16.840.1.113733.1.9.5'
OID_RECIPIENT_NOUNCE = 
'2.16.840.1.113733.1.9.6'
OID_TRANSACTION_ID = 
'2.16.840.1.113733.1.9.7'
OID_EXTENSION_REQUEST = 
'2.16.840.1.113733.1.9.8'
OID_SIGNED_DATA = 
'1.2.840.113549.1.7.2'
OID_DATA = 
'1.2.840.113549.1.7.1'
OID_ENVELOPED_DATA = 
'1.2.840.113549.1.7.3'
OID_RSA_ENCRYPTION = 
'1.2.840.113549.1.1.1'
OID_DES_ALGO = 
'1.2.840.113549.3.7'
OID_CONTENT_TYPE = 
'1.2.840.113549.1.9.3'
OID_SIGNING_TIME = 
'1.2.840.113549.1.9.5'
OID_MESSAGE_DIGEST = 
'1.2.840.113549.1.9.4'
OID_HASH_ALGO_IDENTIFIER = 
'1.3.14.3.2.26'
SCEP_MESSAGE_TYPES =

complete list of possible SCEP values can be found in CISCO’s documentation www.cisco.com/c/en/us/support/docs/security-vpn/public-key-infrastructure-pki/116167-technote-scep-00.html

{ 'PKCSReq' => 19, 'CertRep' => 3, 'GetCertInitial' => 20, 'GetCert' => 21, 'GetCRL' => 22 }
SCEP_PKI_STATUSES = 
{ 'SUCCESS' => 0, 'FAILURE' => 2, 'PENDING' => 3 }
SCEP_FAIL_INFOS = 
{ 'badAlg' => 0, 'badMessageCheck' => 1, 'badRequest' => 2, 'badTime' => 3, 'badCertId' => 4 }

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(asn1, p7) ⇒ PkiMessage

Returns a new instance of PkiMessage.



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# File 'lib/ruby_scep/pki_message.rb', line 35

def initialize(asn1, p7)
  signed_attributes = retrieve_signed_attributes(asn1)
  @message_type = SCEP_MESSAGE_TYPES.key(signed_attributes[OID_MESSAGE_TYPE].to_i)
  @transaction_id = signed_attributes[OID_TRANSACTION_ID]
  @sender_nonce = signed_attributes[OID_SENDER_NONCE]
  @p7 = p7
end

Instance Attribute Details

#p7 ⇒ Object

Returns the value of attribute p7.



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# File 'lib/ruby_scep/pki_message.rb', line 33

def p7
  @p7
end

Instance Method Details

#build_enrollment_response(csr) ⇒ Object

We are building a SCEP Secure Message Object with a valid PKCS7 structure, as referenced

in https://tools.ietf.org/html/draft-nourse-scep-23#section-3

To see a graphical representation of the final PKCS7 structure, go to

https://www.cisco.com/c/dam/en/us/support/docs/security-vpn/public-key-infrastructure-pki/116167-technote-scep-00-01.jpeg

Structure:

1. degenerate
  a. version
  b. x509
2. enveloped data
  a. version
  b. list of recepients
  c. encrypted data (aka 1. degenerate)
3. signed data
  a. version
  b. hashing algo
  c. signed (unencrypted) data (aka 2. enveloped data)
  d. ca certificate
  e. digital signature



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# File 'lib/ruby_scep/pki_message.rb', line 61

def build_enrollment_response(csr)
  degenerate_sequence = build_degenerate_sequence(csr)
  enveloped_data_sequence = build_enveloped_data_sequence(degenerate_sequence)
  build_signed_data_sequence(enveloped_data_sequence)
end