226 lines
8.2 KiB
Python
226 lines
8.2 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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# Copyright (c) 2005-2019, Ilya Etingof <etingof@gmail.com>
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# License: http://snmplabs.com/pyasn1/license.html
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#
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# OCSP request/response syntax
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#
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# Derived from a minimal OCSP library (RFC2560) code written by
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# Bud P. Bruegger <bud@ancitel.it>
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# Copyright: Ancitel, S.p.a, Rome, Italy
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# License: BSD
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#
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#
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# current limitations:
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# * request and response works only for a single certificate
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# * only some values are parsed out of the response
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# * the request does't set a nonce nor signature
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# * there is no signature validation of the response
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# * dates are left as strings in GeneralizedTime format -- datetime.datetime
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# would be nicer
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#
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from pyasn1.type import namedtype
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from pyasn1.type import namedval
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from pyasn1.type import tag
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from pyasn1.type import univ
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from pyasn1.type import useful
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from pyasn1_modules import rfc2459
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# Start of OCSP module definitions
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# This should be in directory Authentication Framework (X.509) module
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class CRLReason(univ.Enumerated):
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namedValues = namedval.NamedValues(
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('unspecified', 0),
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('keyCompromise', 1),
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('cACompromise', 2),
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('affiliationChanged', 3),
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('superseded', 4),
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('cessationOfOperation', 5),
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('certificateHold', 6),
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('removeFromCRL', 8),
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('privilegeWithdrawn', 9),
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('aACompromise', 10)
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)
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# end of directory Authentication Framework (X.509) module
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# This should be in PKIX Certificate Extensions module
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class GeneralName(univ.OctetString):
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pass
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# end of PKIX Certificate Extensions module
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id_kp_OCSPSigning = univ.ObjectIdentifier((1, 3, 6, 1, 5, 5, 7, 3, 9))
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id_pkix_ocsp = univ.ObjectIdentifier((1, 3, 6, 1, 5, 5, 7, 48, 1))
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id_pkix_ocsp_basic = univ.ObjectIdentifier((1, 3, 6, 1, 5, 5, 7, 48, 1, 1))
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id_pkix_ocsp_nonce = univ.ObjectIdentifier((1, 3, 6, 1, 5, 5, 7, 48, 1, 2))
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id_pkix_ocsp_crl = univ.ObjectIdentifier((1, 3, 6, 1, 5, 5, 7, 48, 1, 3))
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id_pkix_ocsp_response = univ.ObjectIdentifier((1, 3, 6, 1, 5, 5, 7, 48, 1, 4))
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id_pkix_ocsp_nocheck = univ.ObjectIdentifier((1, 3, 6, 1, 5, 5, 7, 48, 1, 5))
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id_pkix_ocsp_archive_cutoff = univ.ObjectIdentifier((1, 3, 6, 1, 5, 5, 7, 48, 1, 6))
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id_pkix_ocsp_service_locator = univ.ObjectIdentifier((1, 3, 6, 1, 5, 5, 7, 48, 1, 7))
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class AcceptableResponses(univ.SequenceOf):
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componentType = univ.ObjectIdentifier()
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class ArchiveCutoff(useful.GeneralizedTime):
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pass
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class UnknownInfo(univ.Null):
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pass
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class RevokedInfo(univ.Sequence):
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componentType = namedtype.NamedTypes(
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namedtype.NamedType('revocationTime', useful.GeneralizedTime()),
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namedtype.OptionalNamedType('revocationReason', CRLReason().subtype(
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explicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 0)))
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)
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class CertID(univ.Sequence):
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componentType = namedtype.NamedTypes(
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namedtype.NamedType('hashAlgorithm', rfc2459.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', rfc2459.CertificateSerialNumber())
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)
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class CertStatus(univ.Choice):
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componentType = namedtype.NamedTypes(
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namedtype.NamedType('good',
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univ.Null().subtype(implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 0))),
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namedtype.NamedType('revoked',
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RevokedInfo().subtype(implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 1))),
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namedtype.NamedType('unknown',
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UnknownInfo().subtype(implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 2)))
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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', rfc2459.Extensions().subtype(
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explicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 1)))
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)
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class KeyHash(univ.OctetString):
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pass
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class ResponderID(univ.Choice):
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componentType = namedtype.NamedTypes(
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namedtype.NamedType('byName',
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rfc2459.Name().subtype(explicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 1))),
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namedtype.NamedType('byKey',
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KeyHash().subtype(explicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 2)))
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)
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class Version(univ.Integer):
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namedValues = namedval.NamedValues(('v1', 0))
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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(componentType=SingleResponse())),
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namedtype.OptionalNamedType('responseExtensions', rfc2459.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', rfc2459.AlgorithmIdentifier()),
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namedtype.NamedType('signature', univ.BitString()),
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namedtype.OptionalNamedType('certs', univ.SequenceOf(componentType=rfc2459.Certificate()).subtype(
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explicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 0)))
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)
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class ResponseBytes(univ.Sequence):
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componentType = namedtype.NamedTypes(
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namedtype.NamedType('responseType', univ.ObjectIdentifier()),
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namedtype.NamedType('response', univ.OctetString())
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)
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class OCSPResponseStatus(univ.Enumerated):
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namedValues = namedval.NamedValues(
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('successful', 0),
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('malformedRequest', 1),
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('internalError', 2),
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('tryLater', 3),
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('undefinedStatus', 4), # should never occur
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('sigRequired', 5),
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('unauthorized', 6)
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)
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class OCSPResponse(univ.Sequence):
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componentType = namedtype.NamedTypes(
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namedtype.NamedType('responseStatus', OCSPResponseStatus()),
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namedtype.OptionalNamedType('responseBytes', ResponseBytes().subtype(
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explicitTag=tag.Tag(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', rfc2459.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', rfc2459.AlgorithmIdentifier()),
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namedtype.NamedType('signature', univ.BitString()),
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namedtype.OptionalNamedType('certs', univ.SequenceOf(componentType=rfc2459.Certificate()).subtype(
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explicitTag=tag.Tag(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(componentType=Request())),
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namedtype.OptionalNamedType('requestExtensions', rfc2459.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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