1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
|
#
# This file is part of pyasn1-modules software.
#
# Created by Russ Housley with assistance from asn1ate v.0.6.0.
#
# Copyright (c) 2019, Vigil Security, LLC
# License: http://snmplabs.com/pyasn1/license.html
#
# Securing Header Fields with S/MIME
#
# ASN.1 source from:
# https://www.rfc-editor.org/rfc/rfc7508.txt
# https://www.rfc-editor.org/errata/eid5875
#
from pyasn1.type import char
from pyasn1.type import constraint
from pyasn1.type import namedtype
from pyasn1.type import namedval
from pyasn1.type import univ
from pyasn1_modules import rfc5652
import string
MAX = float('inf')
class Algorithm(univ.Enumerated):
namedValues = namedval.NamedValues(
('canonAlgorithmSimple', 0),
('canonAlgorithmRelaxed', 1)
)
class HeaderFieldStatus(univ.Integer):
namedValues = namedval.NamedValues(
('duplicated', 0),
('deleted', 1),
('modified', 2)
)
class HeaderFieldName(char.VisibleString):
subtypeSpec = (
constraint.PermittedAlphabetConstraint(*string.printable) -
constraint.PermittedAlphabetConstraint(':')
)
class HeaderFieldValue(char.UTF8String):
pass
class HeaderField(univ.Sequence):
componentType = namedtype.NamedTypes(
namedtype.NamedType('field-Name', HeaderFieldName()),
namedtype.NamedType('field-Value', HeaderFieldValue()),
namedtype.DefaultedNamedType('field-Status',
HeaderFieldStatus().subtype(value='duplicated'))
)
class HeaderFields(univ.SequenceOf):
componentType = HeaderField()
subtypeSpec = constraint.ValueSizeConstraint(1, MAX)
class SecureHeaderFields(univ.Set):
componentType = namedtype.NamedTypes(
namedtype.NamedType('canonAlgorithm', Algorithm()),
namedtype.NamedType('secHeaderFields', HeaderFields())
)
id_aa = univ.ObjectIdentifier((1, 2, 840, 113549, 1, 9, 16, 2, ))
id_aa_secureHeaderFieldsIdentifier = id_aa + (55, )
# Map of Attribute Type OIDs to Attributes added to the
# ones that are in rfc5652.py
_cmsAttributesMapUpdate = {
id_aa_secureHeaderFieldsIdentifier: SecureHeaderFields(),
}
rfc5652.cmsAttributesMap.update(_cmsAttributesMapUpdate)
|
