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ipe: fallback to platform keyring also if key in trusted keyring is rejected

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If enabled, we fallback to the platform keyring if the trusted keyring
doesn't have the key used to sign the ipe policy. But if pkcs7_verify()
rejects the key for other reasons, such as usage restrictions, we do not
fallback. Do so, following the same change in dm-verity.

Signed-off-by: Luca Boccassi <bluca@debian.org>
Suggested-by: Serge Hallyn <serge@hallyn.com>
[FW: fixed some line length issues and a typo in the commit message]
Signed-off-by: Fan Wu <wufan@kernel.org>
This commit is contained in:
Luca Boccassi 2024-09-27 10:23:44 +02:00 committed by Fan Wu
parent 02e2f9aa33
commit f40998a8e6
1 changed files with 1 additions and 1 deletions
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security/ipe/policy.c
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@ -178,7 +178,7 @@ struct ipe_policy *ipe_new_policy(const char *text, size_t textlen,
VERIFYING_UNSPECIFIED_SIGNATURE, VERIFYING_UNSPECIFIED_SIGNATURE,
set_pkcs7_data, new); set_pkcs7_data, new);
#ifdef CONFIG_IPE_POLICY_SIG_PLATFORM_KEYRING #ifdef CONFIG_IPE_POLICY_SIG_PLATFORM_KEYRING
if (rc == -ENOKEY) if (rc == -ENOKEY || rc == -EKEYREJECTED)
rc = verify_pkcs7_signature(NULL, 0, new->pkcs7, pkcs7len, rc = verify_pkcs7_signature(NULL, 0, new->pkcs7, pkcs7len,
VERIFY_USE_PLATFORM_KEYRING, VERIFY_USE_PLATFORM_KEYRING,
VERIFYING_UNSPECIFIED_SIGNATURE, VERIFYING_UNSPECIFIED_SIGNATURE,