72 lines
2.2 KiB
Python
72 lines
2.2 KiB
Python
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#
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# This file is part of pyasn1-modules software.
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#
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# Created by Russ Housley with assistance from asn1ate v.0.6.0.
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#
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# Copyright (c) 2019, Vigil Security, LLC
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# License: http://snmplabs.com/pyasn1/license.html
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#
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# CMS Algorithm Identifier Protection Attribute
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#
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# ASN.1 source from:
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# https://www.rfc-editor.org/rfc/rfc6211.txt
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#
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from pyasn1.type import constraint
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from pyasn1.type import namedtype
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from pyasn1.type import tag
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from pyasn1.type import univ
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from pyasn1_modules import rfc5652
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# Imports from RFC 5652
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DigestAlgorithmIdentifier = rfc5652.DigestAlgorithmIdentifier
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MessageAuthenticationCodeAlgorithm = rfc5652.MessageAuthenticationCodeAlgorithm
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SignatureAlgorithmIdentifier = rfc5652.SignatureAlgorithmIdentifier
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# CMS Algorithm Protection attribute
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id_aa_cmsAlgorithmProtect = univ.ObjectIdentifier('1.2.840.113549.1.9.52')
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class CMSAlgorithmProtection(univ.Sequence):
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pass
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CMSAlgorithmProtection.componentType = namedtype.NamedTypes(
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namedtype.NamedType('digestAlgorithm', DigestAlgorithmIdentifier()),
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namedtype.OptionalNamedType('signatureAlgorithm',
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SignatureAlgorithmIdentifier().subtype(
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implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 1))),
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namedtype.OptionalNamedType('macAlgorithm',
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MessageAuthenticationCodeAlgorithm().subtype(
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implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 2)))
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)
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CMSAlgorithmProtection.subtypeSpec = constraint.ConstraintsUnion(
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constraint.WithComponentsConstraint(
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('signatureAlgorithm', constraint.ComponentPresentConstraint()),
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('macAlgorithm', constraint.ComponentAbsentConstraint())),
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constraint.WithComponentsConstraint(
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('signatureAlgorithm', constraint.ComponentAbsentConstraint()),
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('macAlgorithm', constraint.ComponentPresentConstraint()))
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)
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aa_cmsAlgorithmProtection = rfc5652.Attribute()
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aa_cmsAlgorithmProtection['attrType'] = id_aa_cmsAlgorithmProtect
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aa_cmsAlgorithmProtection['attrValues'][0] = CMSAlgorithmProtection()
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# Map of Attribute Type OIDs to Attributes are
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# added to the ones that are in rfc5652.py
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_cmsAttributesMapUpdate = {
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id_aa_cmsAlgorithmProtect: CMSAlgorithmProtection(),
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}
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rfc5652.cmsAttributesMap.update(_cmsAttributesMapUpdate)
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