From patchwork Wed Sep 11 12:29:06 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Roberto Sassu X-Patchwork-Id: 13800435 Received: from frasgout11.his.huawei.com (frasgout11.his.huawei.com [14.137.139.23]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1EE6D191F82; Wed, 11 Sep 2024 12:30:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=14.137.139.23 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726057840; cv=none; b=rfCvPZgit64gBgFe4vmsjZPCUbLxZyTH5ejVuuYoRMKJQBuh8oz+VWpZuD0Sf+ebx6iUw48lWriHba9j2veShinfqILWUArWrTG3CpMGmeSKPnDFUvVFnHdXiGpZkjm+4d+9OgSKITA5hvs+qol4veRY8rUaqYxn2hE1omk47po= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726057840; c=relaxed/simple; bh=QSWW0uOl6XHXEqmztTA7fQh5BzSULZPfrrSVF/tNx+8=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=UdK+XjpgWK58sfAz5zqExczWidFoa/V6mLSkpWpfM2tIue+4uyv4OLv5ISVz9WwI22al5ZtuoS2b8OKs6ZACzb24Qxmz2NG+9dgaHuwre27uCN/fvxlR8xEztO7ujD47FegPrydODSg+3EaXInq9u+Yh7f7kO4IOe4URzzCBDOM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=huaweicloud.com; spf=pass smtp.mailfrom=huaweicloud.com; arc=none smtp.client-ip=14.137.139.23 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=huaweicloud.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huaweicloud.com Received: from mail.maildlp.com (unknown [172.18.186.29]) by frasgout11.his.huawei.com (SkyGuard) with ESMTP id 4X3fYQ5Yxzz9v7Hk; Wed, 11 Sep 2024 20:11:06 +0800 (CST) Received: from mail02.huawei.com (unknown [7.182.16.27]) by mail.maildlp.com (Postfix) with ESMTP id 5403814093A; Wed, 11 Sep 2024 20:30:27 +0800 (CST) Received: from huaweicloud.com (unknown [10.204.63.22]) by APP2 (Coremail) with SMTP id GxC2BwD3pscjjeFmDBG3AA--.60453S11; Wed, 11 Sep 2024 13:30:26 +0100 (CET) From: Roberto Sassu To: dhowells@redhat.com, dwmw2@infradead.org, herbert@gondor.apana.org.au, davem@davemloft.net Cc: linux-kernel@vger.kernel.org, keyrings@vger.kernel.org, linux-crypto@vger.kernel.org, zohar@linux.ibm.com, linux-integrity@vger.kernel.org, torvalds@linux-foundation.org, Roberto Sassu Subject: [PATCH v3 09/14] KEYS: Retry asym key search with partial ID in restrict_link_by_signature() Date: Wed, 11 Sep 2024 14:29:06 +0200 Message-Id: <20240911122911.1381864-10-roberto.sassu@huaweicloud.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240911122911.1381864-1-roberto.sassu@huaweicloud.com> References: <20240911122911.1381864-1-roberto.sassu@huaweicloud.com> Precedence: bulk X-Mailing-List: keyrings@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-CM-TRANSID: GxC2BwD3pscjjeFmDBG3AA--.60453S11 X-Coremail-Antispam: 1UD129KBjvJXoW7tF13Xr4kZryxWF1xWFyfJFb_yoW8GrW5pa y8CryFgry8K347Cay5Aw47W3yfCFs5Ar1fGrs3GwnxC3s0qFs8trWIvF47ury5Cr4IvryS vrWjgr1Ykw4UAF7anT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUPlb4IE77IF4wAFF20E14v26rWj6s0DM7CY07I20VC2zVCF04k2 6cxKx2IYs7xG6rWj6s0DM7CIcVAFz4kK6r1j6r18M28IrcIa0xkI8VA2jI8067AKxVWUAV Cq3wA2048vs2IY020Ec7CjxVAFwI0_Xr0E3s1l8cAvFVAK0II2c7xJM28CjxkF64kEwVA0 rcxSw2x7M28EF7xvwVC0I7IYx2IY67AKxVWUCVW8JwA2z4x0Y4vE2Ix0cI8IcVCY1x0267 AKxVW8Jr0_Cr1UM28EF7xvwVC2z280aVAFwI0_Gr0_Cr1l84ACjcxK6I8E87Iv6xkF7I0E 14v26r4UJVWxJr1le2I262IYc4CY6c8Ij28IcVAaY2xG8wAqx4xG64xvF2IEw4CE5I8CrV C2j2WlYx0E2Ix0cI8IcVAFwI0_Jr0_Jr4lYx0Ex4A2jsIE14v26r1j6r4UMcvjeVCFs4IE 7xkEbVWUJVW8JwACjcxG0xvY0x0EwIxGrwACI402YVCY1x02628vn2kIc2xKxwCY1x0262 kKe7AKxVWUtVW8ZwCF04k20xvY0x0EwIxGrwCFx2IqxVCFs4IE7xkEbVWUJVW8JwC20s02 6c02F40E14v26r1j6r18MI8I3I0E7480Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_Jw 0_GFylIxkGc2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVWUCVW8JwCI42IY6xIIjxv20xvE c7CjxVAFwI0_Gr1j6F4UJwCI42IY6xAIw20EY4v20xvaj40_Jr0_JF4lIxAIcVC2z280aV AFwI0_Gr0_Cr1lIxAIcVC2z280aVCY1x0267AKxVW8Jr0_Cr1UYxBIdaVFxhVjvjDU0xZF pf9x07UZTmfUUUUU= X-CM-SenderInfo: purev21wro2thvvxqx5xdzvxpfor3voofrz/1tbiAgADBGbg-PsHuwABs5 From: Roberto Sassu Retry asymmetric key search in restrict_link_by_signature() to support the case of partial IDs, provided by PGP signatures (only the last 8 bytes). Although RFC 9580 supports the signature subpacket type 33, which contains the full issuer fingerprint, we cannot rely on existing signatures to support it. Signed-off-by: Roberto Sassu Signed-off-by: David Howells --- crypto/asymmetric_keys/restrict.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/crypto/asymmetric_keys/restrict.c b/crypto/asymmetric_keys/restrict.c index afcd4d101ac5..dd3d4b3405f7 100644 --- a/crypto/asymmetric_keys/restrict.c +++ b/crypto/asymmetric_keys/restrict.c @@ -97,8 +97,14 @@ int restrict_link_by_signature(struct key *dest_keyring, key = find_asymmetric_key(trust_keyring, sig->auth_ids[0], sig->auth_ids[1], sig->auth_ids[2], false); - if (IS_ERR(key)) - return -ENOKEY; + if (IS_ERR(key)) { + /* Retry with a partial ID. */ + key = find_asymmetric_key(trust_keyring, + sig->auth_ids[0], sig->auth_ids[1], + sig->auth_ids[2], true); + if (IS_ERR(key)) + return -ENOKEY; + } if (use_builtin_keys && !test_bit(KEY_FLAG_BUILTIN, &key->flags)) ret = -ENOKEY;