310 lines
7.6 KiB
Python
310 lines
7.6 KiB
Python
# coding: utf-8
|
|
|
|
"""
|
|
ASN.1 type classes for the time stamp protocol (TSP). Exports the following
|
|
items:
|
|
|
|
- TimeStampReq()
|
|
- TimeStampResp()
|
|
|
|
Also adds TimeStampedData() support to asn1crypto.cms.ContentInfo(),
|
|
TimeStampedData() and TSTInfo() support to
|
|
asn1crypto.cms.EncapsulatedContentInfo() and some oids and value parsers to
|
|
asn1crypto.cms.CMSAttribute().
|
|
|
|
Other type classes are defined that help compose the types listed above.
|
|
"""
|
|
|
|
from __future__ import unicode_literals, division, absolute_import, print_function
|
|
|
|
from .algos import DigestAlgorithm
|
|
from .cms import (
|
|
CMSAttribute,
|
|
CMSAttributeType,
|
|
ContentInfo,
|
|
ContentType,
|
|
EncapsulatedContentInfo,
|
|
)
|
|
from .core import (
|
|
Any,
|
|
BitString,
|
|
Boolean,
|
|
Choice,
|
|
GeneralizedTime,
|
|
IA5String,
|
|
Integer,
|
|
ObjectIdentifier,
|
|
OctetString,
|
|
Sequence,
|
|
SequenceOf,
|
|
SetOf,
|
|
UTF8String,
|
|
)
|
|
from .crl import CertificateList
|
|
from .x509 import (
|
|
Attributes,
|
|
CertificatePolicies,
|
|
GeneralName,
|
|
GeneralNames,
|
|
)
|
|
|
|
|
|
# The structures in this file are based on https://tools.ietf.org/html/rfc3161,
|
|
# https://tools.ietf.org/html/rfc4998, https://tools.ietf.org/html/rfc5544,
|
|
# https://tools.ietf.org/html/rfc5035, https://tools.ietf.org/html/rfc2634
|
|
|
|
class Version(Integer):
|
|
_map = {
|
|
0: 'v0',
|
|
1: 'v1',
|
|
2: 'v2',
|
|
3: 'v3',
|
|
4: 'v4',
|
|
5: 'v5',
|
|
}
|
|
|
|
|
|
class MessageImprint(Sequence):
|
|
_fields = [
|
|
('hash_algorithm', DigestAlgorithm),
|
|
('hashed_message', OctetString),
|
|
]
|
|
|
|
|
|
class Accuracy(Sequence):
|
|
_fields = [
|
|
('seconds', Integer, {'optional': True}),
|
|
('millis', Integer, {'implicit': 0, 'optional': True}),
|
|
('micros', Integer, {'implicit': 1, 'optional': True}),
|
|
]
|
|
|
|
|
|
class Extension(Sequence):
|
|
_fields = [
|
|
('extn_id', ObjectIdentifier),
|
|
('critical', Boolean, {'default': False}),
|
|
('extn_value', OctetString),
|
|
]
|
|
|
|
|
|
class Extensions(SequenceOf):
|
|
_child_spec = Extension
|
|
|
|
|
|
class TSTInfo(Sequence):
|
|
_fields = [
|
|
('version', Version),
|
|
('policy', ObjectIdentifier),
|
|
('message_imprint', MessageImprint),
|
|
('serial_number', Integer),
|
|
('gen_time', GeneralizedTime),
|
|
('accuracy', Accuracy, {'optional': True}),
|
|
('ordering', Boolean, {'default': False}),
|
|
('nonce', Integer, {'optional': True}),
|
|
('tsa', GeneralName, {'explicit': 0, 'optional': True}),
|
|
('extensions', Extensions, {'implicit': 1, 'optional': True}),
|
|
]
|
|
|
|
|
|
class TimeStampReq(Sequence):
|
|
_fields = [
|
|
('version', Version),
|
|
('message_imprint', MessageImprint),
|
|
('req_policy', ObjectIdentifier, {'optional': True}),
|
|
('nonce', Integer, {'optional': True}),
|
|
('cert_req', Boolean, {'default': False}),
|
|
('extensions', Extensions, {'implicit': 0, 'optional': True}),
|
|
]
|
|
|
|
|
|
class PKIStatus(Integer):
|
|
_map = {
|
|
0: 'granted',
|
|
1: 'granted_with_mods',
|
|
2: 'rejection',
|
|
3: 'waiting',
|
|
4: 'revocation_warning',
|
|
5: 'revocation_notification',
|
|
}
|
|
|
|
|
|
class PKIFreeText(SequenceOf):
|
|
_child_spec = UTF8String
|
|
|
|
|
|
class PKIFailureInfo(BitString):
|
|
_map = {
|
|
0: 'bad_alg',
|
|
2: 'bad_request',
|
|
5: 'bad_data_format',
|
|
14: 'time_not_available',
|
|
15: 'unaccepted_policy',
|
|
16: 'unaccepted_extensions',
|
|
17: 'add_info_not_available',
|
|
25: 'system_failure',
|
|
}
|
|
|
|
|
|
class PKIStatusInfo(Sequence):
|
|
_fields = [
|
|
('status', PKIStatus),
|
|
('status_string', PKIFreeText, {'optional': True}),
|
|
('fail_info', PKIFailureInfo, {'optional': True}),
|
|
]
|
|
|
|
|
|
class TimeStampResp(Sequence):
|
|
_fields = [
|
|
('status', PKIStatusInfo),
|
|
('time_stamp_token', ContentInfo),
|
|
]
|
|
|
|
|
|
class MetaData(Sequence):
|
|
_fields = [
|
|
('hash_protected', Boolean),
|
|
('file_name', UTF8String, {'optional': True}),
|
|
('media_type', IA5String, {'optional': True}),
|
|
('other_meta_data', Attributes, {'optional': True}),
|
|
]
|
|
|
|
|
|
class TimeStampAndCRL(SequenceOf):
|
|
_fields = [
|
|
('time_stamp', EncapsulatedContentInfo),
|
|
('crl', CertificateList, {'optional': True}),
|
|
]
|
|
|
|
|
|
class TimeStampTokenEvidence(SequenceOf):
|
|
_child_spec = TimeStampAndCRL
|
|
|
|
|
|
class DigestAlgorithms(SequenceOf):
|
|
_child_spec = DigestAlgorithm
|
|
|
|
|
|
class EncryptionInfo(Sequence):
|
|
_fields = [
|
|
('encryption_info_type', ObjectIdentifier),
|
|
('encryption_info_value', Any),
|
|
]
|
|
|
|
|
|
class PartialHashtree(SequenceOf):
|
|
_child_spec = OctetString
|
|
|
|
|
|
class PartialHashtrees(SequenceOf):
|
|
_child_spec = PartialHashtree
|
|
|
|
|
|
class ArchiveTimeStamp(Sequence):
|
|
_fields = [
|
|
('digest_algorithm', DigestAlgorithm, {'implicit': 0, 'optional': True}),
|
|
('attributes', Attributes, {'implicit': 1, 'optional': True}),
|
|
('reduced_hashtree', PartialHashtrees, {'implicit': 2, 'optional': True}),
|
|
('time_stamp', ContentInfo),
|
|
]
|
|
|
|
|
|
class ArchiveTimeStampSequence(SequenceOf):
|
|
_child_spec = ArchiveTimeStamp
|
|
|
|
|
|
class EvidenceRecord(Sequence):
|
|
_fields = [
|
|
('version', Version),
|
|
('digest_algorithms', DigestAlgorithms),
|
|
('crypto_infos', Attributes, {'implicit': 0, 'optional': True}),
|
|
('encryption_info', EncryptionInfo, {'implicit': 1, 'optional': True}),
|
|
('archive_time_stamp_sequence', ArchiveTimeStampSequence),
|
|
]
|
|
|
|
|
|
class OtherEvidence(Sequence):
|
|
_fields = [
|
|
('oe_type', ObjectIdentifier),
|
|
('oe_value', Any),
|
|
]
|
|
|
|
|
|
class Evidence(Choice):
|
|
_alternatives = [
|
|
('tst_evidence', TimeStampTokenEvidence, {'implicit': 0}),
|
|
('ers_evidence', EvidenceRecord, {'implicit': 1}),
|
|
('other_evidence', OtherEvidence, {'implicit': 2}),
|
|
]
|
|
|
|
|
|
class TimeStampedData(Sequence):
|
|
_fields = [
|
|
('version', Version),
|
|
('data_uri', IA5String, {'optional': True}),
|
|
('meta_data', MetaData, {'optional': True}),
|
|
('content', OctetString, {'optional': True}),
|
|
('temporal_evidence', Evidence),
|
|
]
|
|
|
|
|
|
class IssuerSerial(Sequence):
|
|
_fields = [
|
|
('issuer', GeneralNames),
|
|
('serial_number', Integer),
|
|
]
|
|
|
|
|
|
class ESSCertID(Sequence):
|
|
_fields = [
|
|
('cert_hash', OctetString),
|
|
('issuer_serial', IssuerSerial, {'optional': True}),
|
|
]
|
|
|
|
|
|
class ESSCertIDs(SequenceOf):
|
|
_child_spec = ESSCertID
|
|
|
|
|
|
class SigningCertificate(Sequence):
|
|
_fields = [
|
|
('certs', ESSCertIDs),
|
|
('policies', CertificatePolicies, {'optional': True}),
|
|
]
|
|
|
|
|
|
class SetOfSigningCertificates(SetOf):
|
|
_child_spec = SigningCertificate
|
|
|
|
|
|
class ESSCertIDv2(Sequence):
|
|
_fields = [
|
|
('hash_algorithm', DigestAlgorithm, {'default': {'algorithm': 'sha256'}}),
|
|
('cert_hash', OctetString),
|
|
('issuer_serial', IssuerSerial, {'optional': True}),
|
|
]
|
|
|
|
|
|
class ESSCertIDv2s(SequenceOf):
|
|
_child_spec = ESSCertIDv2
|
|
|
|
|
|
class SigningCertificateV2(Sequence):
|
|
_fields = [
|
|
('certs', ESSCertIDv2s),
|
|
('policies', CertificatePolicies, {'optional': True}),
|
|
]
|
|
|
|
|
|
class SetOfSigningCertificatesV2(SetOf):
|
|
_child_spec = SigningCertificateV2
|
|
|
|
|
|
EncapsulatedContentInfo._oid_specs['tst_info'] = TSTInfo
|
|
EncapsulatedContentInfo._oid_specs['timestamped_data'] = TimeStampedData
|
|
ContentInfo._oid_specs['timestamped_data'] = TimeStampedData
|
|
ContentType._map['1.2.840.113549.1.9.16.1.4'] = 'tst_info'
|
|
ContentType._map['1.2.840.113549.1.9.16.1.31'] = 'timestamped_data'
|
|
CMSAttributeType._map['1.2.840.113549.1.9.16.2.12'] = 'signing_certificate'
|
|
CMSAttribute._oid_specs['signing_certificate'] = SetOfSigningCertificates
|
|
CMSAttributeType._map['1.2.840.113549.1.9.16.2.47'] = 'signing_certificate_v2'
|
|
CMSAttribute._oid_specs['signing_certificate_v2'] = SetOfSigningCertificatesV2
|