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ipalib/constants.py: factor out TripleDES use

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Cryptography 43 started to warn that in version 48 it will remove
TripleDES support. Change the code to detect missing TripleDES algorithm
and do not fail.

Related: https://pagure.io/freeipa/issue/9641

Signed-off-by: Alexander Bokovoy <abokovoy@redhat.com>
Reviewed-By: Rob Crittenden <rcritten@redhat.com>
This commit is contained in:
Alexander Bokovoy 2024-07-31 11:44:57 +03:00 committed by Rob Crittenden
parent 7f9c890c04
commit fc02904340
2 changed files with 15 additions and 7 deletions
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5
ipalib/constants.py
View File

@ -381,6 +381,7 @@ VAULT_WRAPPING_SUPPORTED_ALGOS = (
VAULT_WRAPPING_DEFAULT_ALGO = VAULT_WRAPPING_AES128_CBC
# Add 3DES for backwards compatibility if supported
if backend.cipher_supported(algorithms.TripleDES(b"\x00" * 8),
modes.CBC(b"\x00" * 8)):
if getattr(algorithms, 'TripleDES', None):
if backend.cipher_supported(algorithms.TripleDES(
b"\x00" * 8), modes.CBC(b"\x00" * 8)):
VAULT_WRAPPING_SUPPORTED_ALGOS += (VAULT_WRAPPING_3DES,)

15
ipaserver/install/ipa_otptoken_import.py
View File

@ -42,6 +42,7 @@ from cryptography.hazmat.backends import default_backend
from ipaplatform.paths import paths
from ipapython import admintool
from ipalib import api, errors
from ipalib.constants import VAULT_WRAPPING_SUPPORTED_ALGOS, VAULT_WRAPPING_3DES
from ipaserver.plugins.ldap2 import AUTOBIND_DISABLED
if six.PY3:
@ -144,15 +145,13 @@ def convertHMACType(value):
def convertAlgorithm(value):
"Converts encryption URI to (mech, ivlen)."
return {
supported_algs = {
"http://www.w3.org/2001/04/xmlenc#aes128-cbc": (
algorithms.AES, modes.CBC, 128),
"http://www.w3.org/2001/04/xmlenc#aes192-cbc": (
algorithms.AES, modes.CBC, 192),
"http://www.w3.org/2001/04/xmlenc#aes256-cbc": (
algorithms.AES, modes.CBC, 256),
"http://www.w3.org/2001/04/xmlenc#tripledes-cbc": (
algorithms.TripleDES, modes.CBC, 64),
"http://www.w3.org/2001/04/xmldsig-more#camellia128": (
algorithms.Camellia, modes.CBC, 128),
"http://www.w3.org/2001/04/xmldsig-more#camellia192": (
@ -168,7 +167,15 @@ def convertAlgorithm(value):
# "http://www.w3.org/2001/04/xmldsig-more#kw-camellia128": "kw-camellia128",
# "http://www.w3.org/2001/04/xmldsig-more#kw-camellia192": "kw-camellia192",
# "http://www.w3.org/2001/04/xmldsig-more#kw-camellia256": "kw-camellia256",
}.get(value.lower(), (None, None, None))
}
# We don't deal with VAULT here but if VAULT_WRAPPING_3DES is not present
# in the list of the vault wrapping algorithms, we cannot use 3DES anywhere
if VAULT_WRAPPING_3DES in VAULT_WRAPPING_SUPPORTED_ALGOS:
supported_algs["http://www.w3.org/2001/04/xmlenc#tripledes-cbc"] = (
algorithms.TripleDES, modes.CBC, 64)
return supported_algs.get(value.lower(), (None, None, None))
def convertEncrypted(value, decryptor=None, pconv=base64.b64decode, econv=lambda x: x):