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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
#
# Elliptic Curve Cryptography (ECC) Algorithms in the CMS
#
# ASN.1 source from:
# https://www.rfc-editor.org/rfc/rfc5753.txt
#
from pyasn1.type import univ, char, namedtype, namedval, tag, constraint, useful
from pyasn1_modules import rfc5280
from pyasn1_modules import rfc5480
from pyasn1_modules import rfc5652
from pyasn1_modules import rfc5751
from pyasn1_modules import rfc8018
# Imports from RFC 5280
AlgorithmIdentifier = rfc5280.AlgorithmIdentifier
# Imports from RFC 5652
OriginatorPublicKey = rfc5652.OriginatorPublicKey
UserKeyingMaterial = rfc5652.UserKeyingMaterial
# Imports from RFC 5480
ECDSA_Sig_Value = rfc5480.ECDSA_Sig_Value
ECParameters = rfc5480.ECParameters
ECPoint = rfc5480.ECPoint
id_ecPublicKey = rfc5480.id_ecPublicKey
# Imports from RFC 8018
id_hmacWithSHA224 = rfc8018.id_hmacWithSHA224
id_hmacWithSHA256 = rfc8018.id_hmacWithSHA256
id_hmacWithSHA384 = rfc8018.id_hmacWithSHA384
id_hmacWithSHA512 = rfc8018.id_hmacWithSHA512
# Object Identifier arcs
x9_63_scheme = univ.ObjectIdentifier('1.3.133.16.840.63.0')
secg_scheme = univ.ObjectIdentifier('1.3.132.1')
# Object Identifiers for the algorithms
dhSinglePass_cofactorDH_sha1kdf_scheme = x9_63_scheme + (3, )
dhSinglePass_cofactorDH_sha224kdf_scheme = secg_scheme + (14, 0, )
dhSinglePass_cofactorDH_sha256kdf_scheme = secg_scheme + (14, 1, )
dhSinglePass_cofactorDH_sha384kdf_scheme = secg_scheme + (14, 2, )
dhSinglePass_cofactorDH_sha512kdf_scheme = secg_scheme + (14, 3, )
dhSinglePass_stdDH_sha1kdf_scheme = x9_63_scheme + (2, )
dhSinglePass_stdDH_sha224kdf_scheme = secg_scheme + (11, 0, )
dhSinglePass_stdDH_sha256kdf_scheme = secg_scheme + (11, 1, )
dhSinglePass_stdDH_sha384kdf_scheme = secg_scheme + (11, 2, )
dhSinglePass_stdDH_sha512kdf_scheme = secg_scheme + (11, 3, )
mqvSinglePass_sha1kdf_scheme = x9_63_scheme + (16, )
mqvSinglePass_sha224kdf_scheme = secg_scheme + (15, 0, )
mqvSinglePass_sha256kdf_scheme = secg_scheme + (15, 1, )
mqvSinglePass_sha384kdf_scheme = secg_scheme + (15, 2, )
mqvSinglePass_sha512kdf_scheme = secg_scheme + (15, 3, )
# Structures for parameters and key derivation
class IV(univ.OctetString):
# Exactly 8 octets
pass
class CBCParameter(IV):
pass
class KeyWrapAlgorithm(AlgorithmIdentifier):
pass
class ECC_CMS_SharedInfo(univ.Sequence):
componentType = namedtype.NamedTypes(
namedtype.NamedType('keyInfo', KeyWrapAlgorithm()),
namedtype.OptionalNamedType('entityUInfo',
univ.OctetString().subtype(explicitTag=tag.Tag(
tag.tagClassContext, tag.tagFormatSimple, 0))),
namedtype.NamedType('suppPubInfo',
univ.OctetString().subtype(explicitTag=tag.Tag(
tag.tagClassContext, tag.tagFormatSimple, 2)))
)
class MQVuserKeyingMaterial(univ.Sequence):
componentType = namedtype.NamedTypes(
namedtype.NamedType('ephemeralPublicKey', OriginatorPublicKey()),
namedtype.OptionalNamedType('addedukm',
UserKeyingMaterial().subtype(explicitTag=tag.Tag(
tag.tagClassContext, tag.tagFormatSimple, 0)))
)
# Update the Algorithm Identifier map in rfc5280.py and
# Update the SMIMECapabilities Attribute Map in rfc5751.py
_algorithmIdentifierMapUpdate = {
dhSinglePass_stdDH_sha1kdf_scheme: KeyWrapAlgorithm(),
dhSinglePass_stdDH_sha224kdf_scheme: KeyWrapAlgorithm(),
dhSinglePass_stdDH_sha256kdf_scheme: KeyWrapAlgorithm(),
dhSinglePass_stdDH_sha384kdf_scheme: KeyWrapAlgorithm(),
dhSinglePass_stdDH_sha512kdf_scheme: KeyWrapAlgorithm(),
dhSinglePass_cofactorDH_sha1kdf_scheme: KeyWrapAlgorithm(),
dhSinglePass_cofactorDH_sha224kdf_scheme: KeyWrapAlgorithm(),
dhSinglePass_cofactorDH_sha256kdf_scheme: KeyWrapAlgorithm(),
dhSinglePass_cofactorDH_sha384kdf_scheme: KeyWrapAlgorithm(),
dhSinglePass_cofactorDH_sha512kdf_scheme: KeyWrapAlgorithm(),
mqvSinglePass_sha1kdf_scheme: KeyWrapAlgorithm(),
mqvSinglePass_sha224kdf_scheme: KeyWrapAlgorithm(),
mqvSinglePass_sha256kdf_scheme: KeyWrapAlgorithm(),
mqvSinglePass_sha384kdf_scheme: KeyWrapAlgorithm(),
mqvSinglePass_sha512kdf_scheme: KeyWrapAlgorithm(),
}
rfc5280.algorithmIdentifierMap.update(_algorithmIdentifierMapUpdate)
rfc5751.smimeCapabilityMap.update(_algorithmIdentifierMapUpdate)
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