223 lines
7.7 KiB
Python
223 lines
7.7 KiB
Python
#
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# This file is part of pyasn1-modules software.
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#
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# Created by Russ Housley.
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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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# Online Certificate Status Protocol (OCSP)
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#
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# ASN.1 source from:
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# https://www.rfc-editor.org/rfc/rfc6960.txt
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#
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from pyasn1.type import univ, char, namedtype, namedval, tag, constraint, useful
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from pyasn1_modules import rfc2560
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from pyasn1_modules import rfc5280
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MAX = float('inf')
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# Imports from RFC 5280
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AlgorithmIdentifier = rfc5280.AlgorithmIdentifier
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AuthorityInfoAccessSyntax = rfc5280.AuthorityInfoAccessSyntax
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Certificate = rfc5280.Certificate
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CertificateSerialNumber = rfc5280.CertificateSerialNumber
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CRLReason = rfc5280.CRLReason
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Extensions = rfc5280.Extensions
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GeneralName = rfc5280.GeneralName
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Name = rfc5280.Name
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id_kp = rfc5280.id_kp
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id_ad_ocsp = rfc5280.id_ad_ocsp
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# Imports from the original OCSP module in RFC 2560
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AcceptableResponses = rfc2560.AcceptableResponses
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ArchiveCutoff = rfc2560.ArchiveCutoff
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CertStatus = rfc2560.CertStatus
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KeyHash = rfc2560.KeyHash
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OCSPResponse = rfc2560.OCSPResponse
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OCSPResponseStatus = rfc2560.OCSPResponseStatus
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ResponseBytes = rfc2560.ResponseBytes
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RevokedInfo = rfc2560.RevokedInfo
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UnknownInfo = rfc2560.UnknownInfo
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Version = rfc2560.Version
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id_kp_OCSPSigning = rfc2560.id_kp_OCSPSigning
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id_pkix_ocsp = rfc2560.id_pkix_ocsp
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id_pkix_ocsp_archive_cutoff = rfc2560.id_pkix_ocsp_archive_cutoff
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id_pkix_ocsp_basic = rfc2560.id_pkix_ocsp_basic
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id_pkix_ocsp_crl = rfc2560.id_pkix_ocsp_crl
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id_pkix_ocsp_nocheck = rfc2560.id_pkix_ocsp_nocheck
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id_pkix_ocsp_nonce = rfc2560.id_pkix_ocsp_nonce
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id_pkix_ocsp_response = rfc2560.id_pkix_ocsp_response
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id_pkix_ocsp_service_locator = rfc2560.id_pkix_ocsp_service_locator
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# Additional object identifiers
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id_pkix_ocsp_pref_sig_algs = id_pkix_ocsp + (8, )
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id_pkix_ocsp_extended_revoke = id_pkix_ocsp + (9, )
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# Updated structures (mostly to improve openTypes support)
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class CertID(univ.Sequence):
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componentType = namedtype.NamedTypes(
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namedtype.NamedType('hashAlgorithm', AlgorithmIdentifier()),
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namedtype.NamedType('issuerNameHash', univ.OctetString()),
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namedtype.NamedType('issuerKeyHash', univ.OctetString()),
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namedtype.NamedType('serialNumber', CertificateSerialNumber())
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)
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class SingleResponse(univ.Sequence):
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componentType = namedtype.NamedTypes(
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namedtype.NamedType('certID', CertID()),
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namedtype.NamedType('certStatus', CertStatus()),
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namedtype.NamedType('thisUpdate', useful.GeneralizedTime()),
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namedtype.OptionalNamedType('nextUpdate', useful.GeneralizedTime().subtype(
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explicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 0))),
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namedtype.OptionalNamedType('singleExtensions', Extensions().subtype(
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explicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 1)))
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)
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class ResponderID(univ.Choice):
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componentType = namedtype.NamedTypes(
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namedtype.NamedType('byName', Name().subtype(
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explicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 1))),
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namedtype.NamedType('byKey', KeyHash().subtype(
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explicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 2)))
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)
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class ResponseData(univ.Sequence):
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componentType = namedtype.NamedTypes(
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namedtype.DefaultedNamedType('version', Version('v1').subtype(
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explicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 0))),
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namedtype.NamedType('responderID', ResponderID()),
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namedtype.NamedType('producedAt', useful.GeneralizedTime()),
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namedtype.NamedType('responses', univ.SequenceOf(
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componentType=SingleResponse())),
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namedtype.OptionalNamedType('responseExtensions', Extensions().subtype(
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explicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 1)))
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)
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class BasicOCSPResponse(univ.Sequence):
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componentType = namedtype.NamedTypes(
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namedtype.NamedType('tbsResponseData', ResponseData()),
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namedtype.NamedType('signatureAlgorithm', AlgorithmIdentifier()),
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namedtype.NamedType('signature', univ.BitString()),
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namedtype.OptionalNamedType('certs', univ.SequenceOf(
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componentType=Certificate()).subtype(explicitTag=tag.Tag(
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tag.tagClassContext, tag.tagFormatSimple, 0)))
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)
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class Request(univ.Sequence):
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componentType = namedtype.NamedTypes(
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namedtype.NamedType('reqCert', CertID()),
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namedtype.OptionalNamedType('singleRequestExtensions', Extensions().subtype(
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explicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 0)))
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)
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class Signature(univ.Sequence):
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componentType = namedtype.NamedTypes(
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namedtype.NamedType('signatureAlgorithm', AlgorithmIdentifier()),
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namedtype.NamedType('signature', univ.BitString()),
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namedtype.OptionalNamedType('certs', univ.SequenceOf(
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componentType=Certificate()).subtype(explicitTag=tag.Tag(
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tag.tagClassContext, tag.tagFormatSimple, 0)))
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)
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class TBSRequest(univ.Sequence):
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componentType = namedtype.NamedTypes(
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namedtype.DefaultedNamedType('version', Version('v1').subtype(
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explicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 0))),
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namedtype.OptionalNamedType('requestorName', GeneralName().subtype(
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explicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 1))),
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namedtype.NamedType('requestList', univ.SequenceOf(
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componentType=Request())),
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namedtype.OptionalNamedType('requestExtensions', Extensions().subtype(
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explicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 2)))
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)
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class OCSPRequest(univ.Sequence):
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componentType = namedtype.NamedTypes(
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namedtype.NamedType('tbsRequest', TBSRequest()),
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namedtype.OptionalNamedType('optionalSignature', Signature().subtype(
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explicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 0)))
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)
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# Previously omitted structure
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class ServiceLocator(univ.Sequence):
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componentType = namedtype.NamedTypes(
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namedtype.NamedType('issuer', Name()),
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namedtype.NamedType('locator', AuthorityInfoAccessSyntax())
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)
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# Additional structures
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class CrlID(univ.Sequence):
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componentType = namedtype.NamedTypes(
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namedtype.OptionalNamedType('crlUrl', char.IA5String().subtype(
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explicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 0))),
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namedtype.OptionalNamedType('crlNum', univ.Integer().subtype(
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explicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 1))),
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namedtype.OptionalNamedType('crlTime', useful.GeneralizedTime().subtype(
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explicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 2)))
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)
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class PreferredSignatureAlgorithm(univ.Sequence):
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componentType = namedtype.NamedTypes(
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namedtype.NamedType('sigIdentifier', AlgorithmIdentifier()),
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namedtype.OptionalNamedType('certIdentifier', AlgorithmIdentifier())
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)
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class PreferredSignatureAlgorithms(univ.SequenceOf):
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componentType = PreferredSignatureAlgorithm()
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# Response Type OID to Response Map
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ocspResponseMap = {
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id_pkix_ocsp_basic: BasicOCSPResponse(),
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}
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# Map of Extension OIDs to Extensions added to the ones
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# that are in rfc5280.py
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_certificateExtensionsMapUpdate = {
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# Certificate Extension
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id_pkix_ocsp_nocheck: univ.Null(""),
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# OCSP Request Extensions
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id_pkix_ocsp_nonce: univ.OctetString(),
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id_pkix_ocsp_response: AcceptableResponses(),
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id_pkix_ocsp_service_locator: ServiceLocator(),
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id_pkix_ocsp_pref_sig_algs: PreferredSignatureAlgorithms(),
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# OCSP Response Extensions
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id_pkix_ocsp_crl: CrlID(),
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id_pkix_ocsp_archive_cutoff: ArchiveCutoff(),
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id_pkix_ocsp_extended_revoke: univ.Null(""),
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}
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rfc5280.certificateExtensionsMap.update(_certificateExtensionsMapUpdate)
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