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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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