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# # This file is part of pyasn1-modules software. # # Copyright (c) 2005-2017, Ilya Etingof <etingof@gmail.com> # License: http://pyasn1.sf.net/license.html # # OCSP request/response syntax # # Derived from a minimal OCSP library (RFC2560) code written by # Bud P. Bruegger <bud@ancitel.it> # Copyright: Ancitel, S.p.a, Rome, Italy # License: BSD # # # current limitations: # * request and response works only for a single certificate # * only some values are parsed out of the response # * the request does't set a nonce nor signature # * there is no signature validation of the response # * dates are left as strings in GeneralizedTime format -- datetime.datetime # would be nicer # from pyasn1.type import namedtype from pyasn1.type import namedval from pyasn1.type import tag from pyasn1.type import univ from pyasn1.type import useful from pyasn1_modules import rfc2459 # Start of OCSP module definitions # This should be in directory Authentication Framework (X.509) module class CRLReason(univ.Enumerated): namedValues = namedval.NamedValues( ('unspecified', 0), ('keyCompromise', 1), ('cACompromise', 2), ('affiliationChanged', 3), ('superseded', 4), ('cessationOfOperation', 5), ('certificateHold', 6), ('removeFromCRL', 8), ('privilegeWithdrawn', 9), ('aACompromise', 10) ) # end of directory Authentication Framework (X.509) module # This should be in PKIX Certificate Extensions module class GeneralName(univ.OctetString): pass # end of PKIX Certificate Extensions module id_kp_OCSPSigning = univ.ObjectIdentifier((1, 3, 6, 1, 5, 5, 7, 3, 9)) id_pkix_ocsp = univ.ObjectIdentifier((1, 3, 6, 1, 5, 5, 7, 48, 1)) id_pkix_ocsp_basic = univ.ObjectIdentifier((1, 3, 6, 1, 5, 5, 7, 48, 1, 1)) id_pkix_ocsp_nonce = univ.ObjectIdentifier((1, 3, 6, 1, 5, 5, 7, 48, 1, 2)) id_pkix_ocsp_crl = univ.ObjectIdentifier((1, 3, 6, 1, 5, 5, 7, 48, 1, 3)) id_pkix_ocsp_response = univ.ObjectIdentifier((1, 3, 6, 1, 5, 5, 7, 48, 1, 4)) id_pkix_ocsp_nocheck = univ.ObjectIdentifier((1, 3, 6, 1, 5, 5, 7, 48, 1, 5)) id_pkix_ocsp_archive_cutoff = univ.ObjectIdentifier((1, 3, 6, 1, 5, 5, 7, 48, 1, 6)) id_pkix_ocsp_service_locator = univ.ObjectIdentifier((1, 3, 6, 1, 5, 5, 7, 48, 1, 7)) class AcceptableResponses(univ.SequenceOf): componentType = univ.ObjectIdentifier() class ArchiveCutoff(useful.GeneralizedTime): pass class UnknownInfo(univ.Null): pass class RevokedInfo(univ.Sequence): componentType = namedtype.NamedTypes( namedtype.NamedType('revocationTime', useful.GeneralizedTime()), namedtype.OptionalNamedType('revocationReason', CRLReason().subtype( explicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 0))) ) class CertID(univ.Sequence): componentType = namedtype.NamedTypes( namedtype.NamedType('hashAlgorithm', rfc2459.AlgorithmIdentifier()), namedtype.NamedType('issuerNameHash', univ.OctetString()), namedtype.NamedType('issuerKeyHash', univ.OctetString()), namedtype.NamedType('serialNumber', rfc2459.CertificateSerialNumber()) ) class CertStatus(univ.Choice): componentType = namedtype.NamedTypes( namedtype.NamedType('good', univ.Null().subtype(implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 0))), namedtype.NamedType('revoked', RevokedInfo().subtype(implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 1))), namedtype.NamedType('unknown', UnknownInfo().subtype(implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 2))) ) class SingleResponse(univ.Sequence): componentType = namedtype.NamedTypes( namedtype.NamedType('certID', CertID()), namedtype.NamedType('certStatus', CertStatus()), namedtype.NamedType('thisUpdate', useful.GeneralizedTime()), namedtype.OptionalNamedType('nextUpdate', useful.GeneralizedTime().subtype( explicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 0))), namedtype.OptionalNamedType('singleExtensions', rfc2459.Extensions().subtype( explicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 1))) ) class KeyHash(univ.OctetString): pass class ResponderID(univ.Choice): componentType = namedtype.NamedTypes( namedtype.NamedType('byName', rfc2459.Name().subtype(explicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 1))), namedtype.NamedType('byKey', KeyHash().subtype(explicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 2))) ) class Version(univ.Integer): namedValues = namedval.NamedValues(('v1', 0)) class ResponseData(univ.Sequence): componentType = namedtype.NamedTypes( namedtype.DefaultedNamedType('version', Version('v1').subtype( explicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 0))), namedtype.NamedType('responderID', ResponderID()), namedtype.NamedType('producedAt', useful.GeneralizedTime()), namedtype.NamedType('responses', univ.SequenceOf(componentType=SingleResponse())), namedtype.OptionalNamedType('responseExtensions', rfc2459.Extensions().subtype( explicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 1))) ) class BasicOCSPResponse(univ.Sequence): componentType = namedtype.NamedTypes( namedtype.NamedType('tbsResponseData', ResponseData()), namedtype.NamedType('signatureAlgorithm', rfc2459.AlgorithmIdentifier()), namedtype.NamedType('signature', univ.BitString()), namedtype.OptionalNamedType('certs', univ.SequenceOf(componentType=rfc2459.Certificate()).subtype( explicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 0))) ) class ResponseBytes(univ.Sequence): componentType = namedtype.NamedTypes( namedtype.NamedType('responseType', univ.ObjectIdentifier()), namedtype.NamedType('response', univ.OctetString()) ) class OCSPResponseStatus(univ.Enumerated): namedValues = namedval.NamedValues( ('successful', 0), ('malformedRequest', 1), ('internalError', 2), ('tryLater', 3), ('undefinedStatus', 4), # should never occur ('sigRequired', 5), ('unauthorized', 6) ) class OCSPResponse(univ.Sequence): componentType = namedtype.NamedTypes( namedtype.NamedType('responseStatus', OCSPResponseStatus()), namedtype.OptionalNamedType('responseBytes', ResponseBytes().subtype( explicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 0))) ) class Request(univ.Sequence): componentType = namedtype.NamedTypes( namedtype.NamedType('reqCert', CertID()), namedtype.OptionalNamedType('singleRequestExtensions', rfc2459.Extensions().subtype( explicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 0))) ) class Signature(univ.Sequence): componentType = namedtype.NamedTypes( namedtype.NamedType('signatureAlgorithm', rfc2459.AlgorithmIdentifier()), namedtype.NamedType('signature', univ.BitString()), namedtype.OptionalNamedType('certs', univ.SequenceOf(componentType=rfc2459.Certificate()).subtype( explicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 0))) ) class TBSRequest(univ.Sequence): componentType = namedtype.NamedTypes( namedtype.DefaultedNamedType('version', Version('v1').subtype( explicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 0))), namedtype.OptionalNamedType('requestorName', GeneralName().subtype( explicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 1))), namedtype.NamedType('requestList', univ.SequenceOf(componentType=Request())), namedtype.OptionalNamedType('requestExtensions', rfc2459.Extensions().subtype( explicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 2))) ) class OCSPRequest(univ.Sequence): componentType = namedtype.NamedTypes( namedtype.NamedType('tbsRequest', TBSRequest()), namedtype.OptionalNamedType('optionalSignature', Signature().subtype( explicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 0))) )