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#
# 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
#
# CMS Algorithm Identifier Protection Attribute
#
# ASN.1 source from:
# https://www.rfc-editor.org/rfc/rfc6211.txt
#
from pyasn1.type import constraint
from pyasn1.type import namedtype
from pyasn1.type import tag
from pyasn1.type import univ
from pyasn1_modules import rfc5652
# Imports from RFC 5652
DigestAlgorithmIdentifier = rfc5652.DigestAlgorithmIdentifier
MessageAuthenticationCodeAlgorithm = rfc5652.MessageAuthenticationCodeAlgorithm
SignatureAlgorithmIdentifier = rfc5652.SignatureAlgorithmIdentifier
# CMS Algorithm Protection attribute
id_aa_cmsAlgorithmProtect = univ.ObjectIdentifier('1.2.840.113549.1.9.52')
class CMSAlgorithmProtection(univ.Sequence):
pass
CMSAlgorithmProtection.componentType = namedtype.NamedTypes(
namedtype.NamedType('digestAlgorithm', DigestAlgorithmIdentifier()),
namedtype.OptionalNamedType('signatureAlgorithm',
SignatureAlgorithmIdentifier().subtype(
implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 1))),
namedtype.OptionalNamedType('macAlgorithm',
MessageAuthenticationCodeAlgorithm().subtype(
implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 2)))
)
CMSAlgorithmProtection.subtypeSpec = constraint.ConstraintsUnion(
constraint.WithComponentsConstraint(
('signatureAlgorithm', constraint.ComponentPresentConstraint()),
('macAlgorithm', constraint.ComponentAbsentConstraint())),
constraint.WithComponentsConstraint(
('signatureAlgorithm', constraint.ComponentAbsentConstraint()),
('macAlgorithm', constraint.ComponentPresentConstraint()))
)
aa_cmsAlgorithmProtection = rfc5652.Attribute()
aa_cmsAlgorithmProtection['attrType'] = id_aa_cmsAlgorithmProtect
aa_cmsAlgorithmProtection['attrValues'][0] = CMSAlgorithmProtection()
# Map of Attribute Type OIDs to Attributes are
# added to the ones that are in rfc5652.py
_cmsAttributesMapUpdate = {
id_aa_cmsAlgorithmProtect: CMSAlgorithmProtection(),
}
rfc5652.cmsAttributesMap.update(_cmsAttributesMapUpdate)
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