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Diffstat (limited to 'pyasn1_modules/rfc6211.py')
-rw-r--r-- | pyasn1_modules/rfc6211.py | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/pyasn1_modules/rfc6211.py b/pyasn1_modules/rfc6211.py new file mode 100644 index 0000000..abd7a86 --- /dev/null +++ b/pyasn1_modules/rfc6211.py @@ -0,0 +1,72 @@ +# +# 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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