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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
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