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rfc6664.py
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# # This file is part of pyasn1-modules software. # # Created by Russ Housley with some assistance from asn1ate v.0.6.0. # # Copyright (c) 2019, Vigil Security, LLC # License: http://snmplabs.com/pyasn1/license.html # # S/MIME Capabilities for Public Key Definitions # # ASN.1 source from: # https://www.rfc-editor.org/rfc/rfc6664.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 rfc5280 from pyasn1_modules import rfc5751 from pyasn1_modules import rfc5480 from pyasn1_modules import rfc4055 from pyasn1_modules import rfc3279 MAX = float('inf') # Imports from RFC 5280 AlgorithmIdentifier = rfc5280.AlgorithmIdentifier # Imports from RFC 3279 dhpublicnumber = rfc3279.dhpublicnumber Dss_Parms = rfc3279.Dss_Parms id_dsa = rfc3279.id_dsa id_ecPublicKey = rfc3279.id_ecPublicKey rsaEncryption = rfc3279.rsaEncryption # Imports from RFC 4055 id_mgf1 = rfc4055.id_mgf1 id_RSAES_OAEP = rfc4055.id_RSAES_OAEP id_RSASSA_PSS = rfc4055.id_RSASSA_PSS # Imports from RFC 5480 ECParameters = rfc5480.ECParameters id_ecDH = rfc5480.id_ecDH id_ecMQV = rfc5480.id_ecMQV # RSA class RSAKeySize(univ.Integer): # suggested values are 1024, 2048, 3072, 4096, 7680, 8192, and 15360; # however, the integer value is not limited to these suggestions pass class RSAKeyCapabilities(univ.Sequence): componentType = namedtype.NamedTypes( namedtype.NamedType('minKeySize', RSAKeySize()), namedtype.OptionalNamedType('maxKeySize', RSAKeySize()) ) class RsaSsa_Pss_sig_caps(univ.Sequence): componentType = namedtype.NamedTypes( namedtype.NamedType('hashAlg', AlgorithmIdentifier()), namedtype.OptionalNamedType('maskAlg', AlgorithmIdentifier()), namedtype.DefaultedNamedType('trailerField', univ.Integer().subtype(value=1)) ) # Diffie-Hellman and DSA class DSAKeySize(univ.Integer): subtypeSpec = constraint.SingleValueConstraint(1024, 2048, 3072, 7680, 15360) class DSAKeyCapabilities(univ.Choice): componentType = namedtype.NamedTypes( namedtype.NamedType('keySizes', univ.Sequence(componentType=namedtype.NamedTypes( namedtype.NamedType('minKeySize', DSAKeySize()), namedtype.OptionalNamedType('maxKeySize', DSAKeySize()), namedtype.OptionalNamedType('maxSizeP', univ.Integer().subtype(explicitTag=tag.Tag( tag.tagClassContext, tag.tagFormatSimple, 1))), namedtype.OptionalNamedType('maxSizeQ', univ.Integer().subtype(explicitTag=tag.Tag( tag.tagClassContext, tag.tagFormatSimple, 2))), namedtype.OptionalNamedType('maxSizeG', univ.Integer().subtype(explicitTag=tag.Tag( tag.tagClassContext, tag.tagFormatSimple, 3))) )).subtype(explicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 0))), namedtype.NamedType('keyParams', Dss_Parms().subtype(explicitTag=tag.Tag( tag.tagClassContext, tag.tagFormatConstructed, 1))) ) # Elliptic Curve class EC_SMimeCaps(univ.SequenceOf): componentType = ECParameters() subtypeSpec=constraint.ValueSizeConstraint(1, MAX) # Update the SMIMECapabilities Attribute Map in rfc5751.py # # The map can either include an entry for scap-sa-rsaSSA-PSS or # scap-pk-rsaSSA-PSS, but not both. One is associated with the # public key and the other is associated with the signature # algorithm; however, they use the same OID. If you need the # other one in your application, copy the map into a local dict, # adjust as needed, and pass the local dict to the decoder with # openTypes=your_local_map. _smimeCapabilityMapUpdate = { rsaEncryption: RSAKeyCapabilities(), id_RSASSA_PSS: RSAKeyCapabilities(), # id_RSASSA_PSS: RsaSsa_Pss_sig_caps(), id_RSAES_OAEP: RSAKeyCapabilities(), id_dsa: DSAKeyCapabilities(), dhpublicnumber: DSAKeyCapabilities(), id_ecPublicKey: EC_SMimeCaps(), id_ecDH: EC_SMimeCaps(), id_ecMQV: EC_SMimeCaps(), id_mgf1: AlgorithmIdentifier(), } rfc5751.smimeCapabilityMap.update(_smimeCapabilityMapUpdate)