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#
# This file is part of pyasn1-modules software.
#
# Created by Russ Housley with some assistance from asn1ate v.0.6.0.
#
# Copyright (c) 2019, Vigil Security, LLC
# License: https://www.pysnmp.com/pyasn1/license.html
#
# Using Pre-Shared Key (PSK) in the Cryptographic Message Syntax (CMS)
#
# ASN.1 source from:
# https://www.rfc-editor.org/rfc/rfc8696.txt
#
from pyasn1.type import constraint, namedtype, namedval, tag, univ
from pyasn1_modules import rfc5652
MAX = float("inf")
id_ori = univ.ObjectIdentifier("1.2.840.113549.1.9.16.13")
id_ori_keyTransPSK = univ.ObjectIdentifier("1.2.840.113549.1.9.16.13.1")
id_ori_keyAgreePSK = univ.ObjectIdentifier("1.2.840.113549.1.9.16.13.2")
class PreSharedKeyIdentifier(univ.OctetString):
pass
class KeyTransRecipientInfos(univ.SequenceOf):
componentType = rfc5652.KeyTransRecipientInfo()
class KeyTransPSKRecipientInfo(univ.Sequence):
componentType = namedtype.NamedTypes(
namedtype.NamedType("version", rfc5652.CMSVersion()),
namedtype.NamedType("pskid", PreSharedKeyIdentifier()),
namedtype.NamedType("kdfAlgorithm", rfc5652.KeyDerivationAlgorithmIdentifier()),
namedtype.NamedType(
"keyEncryptionAlgorithm", rfc5652.KeyEncryptionAlgorithmIdentifier()
),
namedtype.NamedType("ktris", KeyTransRecipientInfos()),
namedtype.NamedType("encryptedKey", rfc5652.EncryptedKey()),
)
class KeyAgreePSKRecipientInfo(univ.Sequence):
componentType = namedtype.NamedTypes(
namedtype.NamedType("version", rfc5652.CMSVersion()),
namedtype.NamedType("pskid", PreSharedKeyIdentifier()),
namedtype.NamedType(
"originator",
rfc5652.OriginatorIdentifierOrKey().subtype(
explicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatConstructed, 0)
),
),
namedtype.OptionalNamedType(
"ukm",
rfc5652.UserKeyingMaterial().subtype(
explicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 1)
),
),
namedtype.NamedType("kdfAlgorithm", rfc5652.KeyDerivationAlgorithmIdentifier()),
namedtype.NamedType(
"keyEncryptionAlgorithm", rfc5652.KeyEncryptionAlgorithmIdentifier()
),
namedtype.NamedType("recipientEncryptedKeys", rfc5652.RecipientEncryptedKeys()),
)
class CMSORIforPSKOtherInfo(univ.Sequence):
componentType = namedtype.NamedTypes(
namedtype.NamedType("psk", univ.OctetString()),
namedtype.NamedType(
"keyMgmtAlgType",
univ.Enumerated(
namedValues=namedval.NamedValues(("keyTrans", 5), ("keyAgree", 10))
),
),
namedtype.NamedType(
"keyEncryptionAlgorithm", rfc5652.KeyEncryptionAlgorithmIdentifier()
),
namedtype.NamedType(
"pskLength",
univ.Integer().subtype(subtypeSpec=constraint.ValueRangeConstraint(1, MAX)),
),
namedtype.NamedType(
"kdkLength",
univ.Integer().subtype(subtypeSpec=constraint.ValueRangeConstraint(1, MAX)),
),
)
# Update the CMS Other Recipient Info map in rfc5652.py
_otherRecipientInfoMapUpdate = {
id_ori_keyTransPSK: KeyTransPSKRecipientInfo(),
id_ori_keyAgreePSK: KeyAgreePSKRecipientInfo(),
}
rfc5652.otherRecipientInfoMap.update(_otherRecipientInfoMapUpdate)
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