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#
# 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
#
# Using the GOST 28147-89, GOST R 34.11-94, GOST R 34.10-94, and
# GOST R 34.10-2001 Algorithms with the CMS
#
# ASN.1 source from:
# https://www.rfc-editor.org/rfc/rfc4490.txt
#
from pyasn1.type import univ, char, namedtype, namedval, tag, constraint, useful
from pyasn1_modules import rfc4357
from pyasn1_modules import rfc5280
# Imports from RFC 4357
id_CryptoPro_algorithms = rfc4357.id_CryptoPro_algorithms
id_GostR3410_94 = rfc4357.id_GostR3410_94
id_GostR3410_2001 = rfc4357.id_GostR3410_2001
Gost28147_89_ParamSet = rfc4357.Gost28147_89_ParamSet
Gost28147_89_EncryptedKey = rfc4357.Gost28147_89_EncryptedKey
GostR3410_94_PublicKeyParameters = rfc4357.GostR3410_94_PublicKeyParameters
GostR3410_2001_PublicKeyParameters = rfc4357.GostR3410_2001_PublicKeyParameters
# Imports from RFC 5280
SubjectPublicKeyInfo = rfc5280.SubjectPublicKeyInfo
# CMS/PKCS#7 key agreement algorithms & parameters
class Gost28147_89_KeyWrapParameters(univ.Sequence):
componentType = namedtype.NamedTypes(
namedtype.NamedType('encryptionParamSet', Gost28147_89_ParamSet()),
namedtype.OptionalNamedType('ukm', univ.OctetString().subtype(
subtypeSpec=constraint.ValueSizeConstraint(8, 8)))
)
id_Gost28147_89_CryptoPro_KeyWrap = id_CryptoPro_algorithms + (13, 1, )
id_Gost28147_89_None_KeyWrap = id_CryptoPro_algorithms + (13, 0, )
id_GostR3410_2001_CryptoPro_ESDH = id_CryptoPro_algorithms + (96, )
id_GostR3410_94_CryptoPro_ESDH = id_CryptoPro_algorithms + (97, )
# CMS/PKCS#7 key transport algorithms & parameters
id_GostR3410_2001_KeyTransportSMIMECapability = id_GostR3410_2001
id_GostR3410_94_KeyTransportSMIMECapability = id_GostR3410_94
class GostR3410_TransportParameters(univ.Sequence):
componentType = namedtype.NamedTypes(
namedtype.NamedType('encryptionParamSet', Gost28147_89_ParamSet()),
namedtype.OptionalNamedType('ephemeralPublicKey',
SubjectPublicKeyInfo().subtype(implicitTag=tag.Tag(
tag.tagClassContext, tag.tagFormatSimple, 0))),
namedtype.NamedType('ukm', univ.OctetString().subtype(
subtypeSpec=constraint.ValueSizeConstraint(8, 8)))
)
class GostR3410_KeyTransport(univ.Sequence):
componentType = namedtype.NamedTypes(
namedtype.NamedType('sessionEncryptedKey', Gost28147_89_EncryptedKey()),
namedtype.OptionalNamedType('transportParameters',
GostR3410_TransportParameters().subtype(implicitTag=tag.Tag(
tag.tagClassContext, tag.tagFormatConstructed, 0)))
)
# GOST R 34.10-94 signature algorithm & parameters
class GostR3410_94_Signature(univ.OctetString):
subtypeSpec = constraint.ValueSizeConstraint(64, 64)
# GOST R 34.10-2001 signature algorithms and parameters
class GostR3410_2001_Signature(univ.OctetString):
subtypeSpec = constraint.ValueSizeConstraint(64, 64)
# Update the Algorithm Identifier map in rfc5280.py
_algorithmIdentifierMapUpdate = {
id_Gost28147_89_CryptoPro_KeyWrap: Gost28147_89_KeyWrapParameters(),
id_Gost28147_89_None_KeyWrap: Gost28147_89_KeyWrapParameters(),
}
rfc5280.algorithmIdentifierMap.update(_algorithmIdentifierMapUpdate)