text: #
  # This file is part of pyasn1-modules software.
  #
  # Created by Russ Housley with assistance from asn1ate v.0.6.0.
  #
  # Copyright (c) 2019, Vigil Security, LLC
  # License: http://snmplabs.com/pyasn1/license.html
  #
  # Securing Header Fields with S/MIME
  #
  # ASN.1 source from:
  # https://www.rfc-editor.org/rfc/rfc7508.txt
  # https://www.rfc-editor.org/errata/eid5875
  #
  
  from pyasn1.type import char
  from pyasn1.type import constraint
  from pyasn1.type import namedtype
  from pyasn1.type import namedval
  from pyasn1.type import univ
  
  from pyasn1_modules import rfc5652
  
  import string
  
  MAX = float('inf')
  
  
  class Algorithm(univ.Enumerated):
      namedValues = namedval.NamedValues(
          ('canonAlgorithmSimple', 0),
          ('canonAlgorithmRelaxed', 1)
      )
  
  
  class HeaderFieldStatus(univ.Integer):
      namedValues = namedval.NamedValues(
          ('duplicated', 0),
          ('deleted', 1),
          ('modified', 2)
      )
  
  
  class HeaderFieldName(char.VisibleString):
      subtypeSpec = (
          constraint.PermittedAlphabetConstraint(*string.printable) -
          constraint.PermittedAlphabetConstraint(':')
      )
  
  
  class HeaderFieldValue(char.UTF8String):
      pass
  
  
  class HeaderField(univ.Sequence):
      componentType = namedtype.NamedTypes(
          namedtype.NamedType('field-Name', HeaderFieldName()),
          namedtype.NamedType('field-Value', HeaderFieldValue()),
          namedtype.DefaultedNamedType('field-Status',
              HeaderFieldStatus().subtype(value='duplicated'))
      )
  
  
  class HeaderFields(univ.SequenceOf):
      componentType = HeaderField()
      subtypeSpec = constraint.ValueSizeConstraint(1, MAX)
  
  
  class SecureHeaderFields(univ.Set):
      componentType = namedtype.NamedTypes(
          namedtype.NamedType('canonAlgorithm', Algorithm()),
          namedtype.NamedType('secHeaderFields', HeaderFields())
      )
  
  
  id_aa = univ.ObjectIdentifier((1, 2, 840, 113549, 1, 9, 16, 2, ))
  
  id_aa_secureHeaderFieldsIdentifier = id_aa + (55, )
  
  
  
  # Map of Attribute Type OIDs to Attributes added to the
  # ones that are in rfc5652.py
  
  _cmsAttributesMapUpdate = {
      id_aa_secureHeaderFieldsIdentifier: SecureHeaderFields(),
  }
  
  rfc5652.cmsAttributesMap.update(_cmsAttributesMapUpdate)
  
  