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/usr/lib/python3/dist-packages/pyasn1_modules/rfc2315.py is in python3-pyasn1-modules 0.0.7-0.1.

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#
# PKCS#7 message syntax
#
# ASN.1 source from:
# http://www.trl.ibm.com/projects/xml/xss4j/data/asn1/grammars/pkcs7.asn
#
# Sample captures from:
# openssl crl2pkcs7 -nocrl -certfile cert1.cer -out outfile.p7b
#
from pyasn1.type import tag,namedtype,namedval,univ,constraint,char,useful
from pyasn1_modules.rfc2459 import *

class Attribute(univ.Sequence):
    componentType = namedtype.NamedTypes(
        namedtype.NamedType('type', AttributeType()),
        namedtype.NamedType('values', univ.SetOf(componentType=AttributeValue()))
        )

class AttributeValueAssertion(univ.Sequence):
    componentType = namedtype.NamedTypes(
        namedtype.NamedType('attributeType', AttributeType()),
        namedtype.NamedType('attributeValue', AttributeValue())
        )

pkcs_7 = univ.ObjectIdentifier('1.2.840.113549.1.7')
data = univ.ObjectIdentifier('1.2.840.113549.1.7.1')
signedData = univ.ObjectIdentifier('1.2.840.113549.1.7.2')
envelopedData = univ.ObjectIdentifier('1.2.840.113549.1.7.3')
signedAndEnvelopedData = univ.ObjectIdentifier('1.2.840.113549.1.7.4')
digestedData = univ.ObjectIdentifier('1.2.840.113549.1.7.5')
encryptedData = univ.ObjectIdentifier('1.2.840.113549.1.7.6')

class ContentType(univ.ObjectIdentifier): pass

class ContentEncryptionAlgorithmIdentifier(AlgorithmIdentifier): pass

class EncryptedContent(univ.OctetString): pass

class EncryptedContentInfo(univ.Sequence):
    componentType = namedtype.NamedTypes(
        namedtype.NamedType('contentType', ContentType()),
        namedtype.NamedType('contentEncryptionAlgorithm', ContentEncryptionAlgorithmIdentifier()),
        namedtype.OptionalNamedType('encryptedContent', EncryptedContent().subtype(implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 0)))
        )

class Version(univ.Integer): pass  # overrides x509.Version

class EncryptedData(univ.Sequence):
    componentType = namedtype.NamedTypes(
        namedtype.NamedType('version', Version()),
        namedtype.NamedType('encryptedContentInfo', EncryptedContentInfo())
        )

class DigestAlgorithmIdentifier(AlgorithmIdentifier): pass

class DigestAlgorithmIdentifiers(univ.SetOf):
    componentType = DigestAlgorithmIdentifier()

class Digest(univ.OctetString): pass

class ContentInfo(univ.Sequence):
    componentType = namedtype.NamedTypes(
        namedtype.NamedType('contentType', ContentType()),
        namedtype.OptionalNamedType('content', univ.Any().subtype(explicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 0)))
        )

class DigestedData(univ.Sequence):
    componentType = namedtype.NamedTypes(
        namedtype.NamedType('version', Version()),
        namedtype.NamedType('digestAlgorithm', DigestAlgorithmIdentifier()),
        namedtype.NamedType('contentInfo', ContentInfo()),
        namedtype.NamedType('digest', Digest)
        )

class IssuerAndSerialNumber(univ.Sequence):
    componentType = namedtype.NamedTypes(
        namedtype.NamedType('issuer', Name()),
        namedtype.NamedType('serialNumber', CertificateSerialNumber())
        )

class KeyEncryptionAlgorithmIdentifier(AlgorithmIdentifier): pass

class EncryptedKey(univ.OctetString): pass

class RecipientInfo(univ.Sequence):
    componentType = namedtype.NamedTypes(
        namedtype.NamedType('version', Version()),
        namedtype.NamedType('issuerAndSerialNumber', IssuerAndSerialNumber()),
        namedtype.NamedType('keyEncryptionAlgorithm', KeyEncryptionAlgorithmIdentifier()),
        namedtype.NamedType('encryptedKey', EncryptedKey())
        )
                    
class RecipientInfos(univ.SetOf):
    componentType = RecipientInfo()

class Attributes(univ.SetOf):
    componentType = Attribute()

class ExtendedCertificateInfo(univ.Sequence):
    componentType = namedtype.NamedTypes(
        namedtype.NamedType('version', Version()),
        namedtype.NamedType('certificate', Certificate()),
        namedtype.NamedType('attributes', Attributes())
        )

class SignatureAlgorithmIdentifier(AlgorithmIdentifier): pass

class Signature(univ.BitString): pass

class ExtendedCertificate(univ.Sequence):
    componentType = namedtype.NamedTypes(
        namedtype.NamedType('extendedCertificateInfo', ExtendedCertificateInfo()),
        namedtype.NamedType('signatureAlgorithm', SignatureAlgorithmIdentifier()),
        namedtype.NamedType('signature', Signature())
        )

class ExtendedCertificateOrCertificate(univ.Choice):
    componentType = namedtype.NamedTypes(
        namedtype.NamedType('certificate', Certificate()),
        namedtype.NamedType('extendedCertificate', ExtendedCertificate().subtype(implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 0)))
        )

class ExtendedCertificatesAndCertificates(univ.SetOf):
    componentType = ExtendedCertificateOrCertificate()

class SerialNumber(univ.Integer): pass

class CRLEntry(univ.Sequence):
    componentType = namedtype.NamedTypes(
        namedtype.NamedType('userCertificate', SerialNumber()),
        namedtype.NamedType('revocationDate', useful.UTCTime())
        )

class TBSCertificateRevocationList(univ.Sequence):
    componentType = namedtype.NamedTypes(
        namedtype.NamedType('signature', AlgorithmIdentifier()),
        namedtype.NamedType('issuer', Name()),
        namedtype.NamedType('lastUpdate', useful.UTCTime()),
        namedtype.NamedType('nextUpdate', useful.UTCTime()),
        namedtype.OptionalNamedType('revokedCertificates', univ.SequenceOf(componentType=CRLEntry()))
        )
                            
class CertificateRevocationList(univ.Sequence):
    componentType = namedtype.NamedTypes(
        namedtype.NamedType('tbsCertificateRevocationList', TBSCertificateRevocationList()),
        namedtype.NamedType('signatureAlgorithm', AlgorithmIdentifier()),
        namedtype.NamedType('signature', univ.BitString())
        )

class CertificateRevocationLists(univ.SetOf):
    componentType = CertificateRevocationList()

class DigestEncryptionAlgorithmIdentifier(AlgorithmIdentifier): pass

class EncryptedDigest(univ.OctetString): pass

class SignerInfo(univ.Sequence):
    componentType = namedtype.NamedTypes(
        namedtype.NamedType('version', Version()),
        namedtype.NamedType('issuerAndSerialNumber', IssuerAndSerialNumber()),
        namedtype.NamedType('digestAlgorithm', DigestAlgorithmIdentifier()),
        namedtype.OptionalNamedType('authenticatedAttributes', Attributes().subtype(implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 0))),
        namedtype.NamedType('digestEncryptionAlgorithm', DigestEncryptionAlgorithmIdentifier()),
        namedtype.NamedType('encryptedDigest', EncryptedDigest()),
        namedtype.OptionalNamedType('unauthenticatedAttributes', Attributes().subtype(implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 1)))
        )
                    
class SignerInfos(univ.SetOf):
    componentType = SignerInfo()

class SignedAndEnvelopedData(univ.Sequence):
    componentType = namedtype.NamedTypes(
        namedtype.NamedType('version', Version()),
        namedtype.NamedType('recipientInfos', RecipientInfos()),
        namedtype.NamedType('digestAlgorithms', DigestAlgorithmIdentifiers()),
        namedtype.NamedType('encryptedContentInfo', EncryptedContentInfo()),
        namedtype.OptionalNamedType('certificates', ExtendedCertificatesAndCertificates().subtype(implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 0))),
        namedtype.OptionalNamedType('crls', CertificateRevocationLists().subtype(implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 1))),
        namedtype.NamedType('signerInfos', SignerInfos())
        )

class EnvelopedData(univ.Sequence):
    componentType = namedtype.NamedTypes(
        namedtype.NamedType('version', Version()),
        namedtype.NamedType('recipientInfos', RecipientInfos()),
        namedtype.NamedType('encryptedContentInfo', EncryptedContentInfo())
        )
    
class DigestInfo(univ.Sequence):
    componentType = namedtype.NamedTypes(
        namedtype.NamedType('digestAlgorithm', DigestAlgorithmIdentifier()),
        namedtype.NamedType('digest', Digest())
        )
                    
class SignedData(univ.Sequence):
    componentType = namedtype.NamedTypes(
        namedtype.NamedType('version', Version()),
        namedtype.NamedType('digestAlgorithms', DigestAlgorithmIdentifiers()),
        namedtype.NamedType('contentInfo', ContentInfo()),
        namedtype.OptionalNamedType('certificates', ExtendedCertificatesAndCertificates().subtype(implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 0))),
        namedtype.OptionalNamedType('crls', CertificateRevocationLists().subtype(implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 1))),
        namedtype.NamedType('signerInfos', SignerInfos())
        )
        
class Data(univ.OctetString): pass