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From 653a7fe02880c168755984133ee143567cc7bb4e Mon Sep 17 00:00:00 2001
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From: Francisco Trivino <ftrivino@redhat.com>
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Date: Wed, 26 Jan 2022 15:43:39 +0100
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Subject: [PATCH] Custodia: use a stronger encryption algo when exporting keys
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The Custodia key export handler is using the default's OpenSSL encryption
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scheme for PKCS#12.
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This represents an issue when performing a migration from CentOS Stream 8 (C8S)
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to CentOS Steam 9 (C9S) where the Custodia client running in the new C9S
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replica talks to the Custodia server on C8S source server. The later creates an
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encrypted PKCS#12 file that contains the cert and the key using the OpenSSL's
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default encryption scheme, which is no longer supported on C9S.
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This commit enforces a stronger encryption algorigthm by adding following
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arguments to the Custodia server handler:
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-keypbe AES-256-CBC -certpbe AES-256-CBC -macalg sha384
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The new arguments enforce stronger PBEv2 instead of the insecure PBEv1.
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Fixes: https://pagure.io/freeipa/issue/9101
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Signed-off-by: Francisco Trivino <ftrivino@redhat.com>
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Reviewed-By: Christian Heimes <cheimes@redhat.com>
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Reviewed-By: Florence Blanc-Renaud <flo@redhat.com>
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---
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ipaserver/secrets/handlers/pemfile.py | 3 +++
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1 file changed, 3 insertions(+)
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diff --git a/ipaserver/secrets/handlers/pemfile.py b/ipaserver/secrets/handlers/pemfile.py
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index 4e8eff0e3..ad36bd020 100644
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--- a/ipaserver/secrets/handlers/pemfile.py
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+++ b/ipaserver/secrets/handlers/pemfile.py
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@@ -31,6 +31,9 @@ def export_key(args, tmpdir):
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'-out', pk12file,
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'-inkey', args.keyfile,
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'-password', 'file:{pk12pwfile}'.format(pk12pwfile=pk12pwfile),
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+ '-keypbe', 'AES-256-CBC',
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+ '-certpbe', 'AES-256-CBC',
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+ '-macalg', 'sha384',
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])
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with open(pk12file, 'rb') as f:
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--
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2.34.1
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