From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 873B8C4321E for ; Sun, 1 May 2022 05:13:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240749AbiEAFQY (ORCPT ); Sun, 1 May 2022 01:16:24 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40884 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240557AbiEAFQQ (ORCPT ); Sun, 1 May 2022 01:16:16 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4040550E16; Sat, 30 Apr 2022 22:12:50 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id DE9F6B80CDF; Sun, 1 May 2022 05:12:48 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 65DC8C385B5; Sun, 1 May 2022 05:12:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1651381967; bh=lZT1gByo3Y9Ub5T0TA1IR1XBzyPH8WZkJ9F8N3p3es0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=T1+iweG7jBy7ELy5r7MYHZHjHcu7ab9qUVX9z9mtOopxiYXR3GmtbIVHrvfIq0eIG 7PUhfBXIP7yVu5kYBw+5KGjR8vunqyY5dBv9I5zbDqqXj5vR5fD73Fvzhe/DmCweL+ hIDnU0LhqOzYEcD4HGGLbF04ArCT6/dF2S5HXYOnnKv4OHPE4T3UxKUUCudovpcqQX Pr6d8ah7kthYGLA3m18muKEZv3nOOZ8lo1tg78FTiZWkRAC6xvBzXpIUP0VHU9yTRF 36AIHnGOB0/DP2Qxwk9hYgm0lsUXf87CYWnKEukWlweCR0i1deBNzR6/UHH+wX6ak/ IJtWAQr466irQ== From: Eric Biggers To: linux-fscrypt@vger.kernel.org, linux-ext4@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net Cc: Lukas Czerner , Theodore Ts'o , Jaegeuk Kim , Jeff Layton Subject: [PATCH v2 3/7] fscrypt: factor out fscrypt_policy_to_key_spec() Date: Sat, 30 Apr 2022 22:08:53 -0700 Message-Id: <20220501050857.538984-4-ebiggers@kernel.org> X-Mailer: git-send-email 2.36.0 In-Reply-To: <20220501050857.538984-1-ebiggers@kernel.org> References: <20220501050857.538984-1-ebiggers@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-ext4@vger.kernel.org From: Eric Biggers Factor out a function that builds the fscrypt_key_specifier for an fscrypt_policy. Before this was only needed when finding the key for a file, but now it will also be needed for test_dummy_encryption support. Signed-off-by: Eric Biggers --- fs/crypto/fscrypt_private.h | 2 ++ fs/crypto/keysetup.c | 20 +++----------------- fs/crypto/policy.c | 20 ++++++++++++++++++++ 3 files changed, 25 insertions(+), 17 deletions(-) diff --git a/fs/crypto/fscrypt_private.h b/fs/crypto/fscrypt_private.h index 5b0a9e6478b5d..f32d0ee91e70e 100644 --- a/fs/crypto/fscrypt_private.h +++ b/fs/crypto/fscrypt_private.h @@ -621,6 +621,8 @@ int fscrypt_setup_v1_file_key_via_subscribed_keyrings(struct fscrypt_info *ci); bool fscrypt_policies_equal(const union fscrypt_policy *policy1, const union fscrypt_policy *policy2); +int fscrypt_policy_to_key_spec(const union fscrypt_policy *policy, + struct fscrypt_key_specifier *key_spec); bool fscrypt_supported_policy(const union fscrypt_policy *policy_u, const struct inode *inode); int fscrypt_policy_from_context(union fscrypt_policy *policy_u, diff --git a/fs/crypto/keysetup.c b/fs/crypto/keysetup.c index eede186b04ce3..571d220d6e226 100644 --- a/fs/crypto/keysetup.c +++ b/fs/crypto/keysetup.c @@ -425,23 +425,9 @@ static int setup_file_encryption_key(struct fscrypt_info *ci, if (err) return err; - switch (ci->ci_policy.version) { - case FSCRYPT_POLICY_V1: - mk_spec.type = FSCRYPT_KEY_SPEC_TYPE_DESCRIPTOR; - memcpy(mk_spec.u.descriptor, - ci->ci_policy.v1.master_key_descriptor, - FSCRYPT_KEY_DESCRIPTOR_SIZE); - break; - case FSCRYPT_POLICY_V2: - mk_spec.type = FSCRYPT_KEY_SPEC_TYPE_IDENTIFIER; - memcpy(mk_spec.u.identifier, - ci->ci_policy.v2.master_key_identifier, - FSCRYPT_KEY_IDENTIFIER_SIZE); - break; - default: - WARN_ON(1); - return -EINVAL; - } + err = fscrypt_policy_to_key_spec(&ci->ci_policy, &mk_spec); + if (err) + return err; key = fscrypt_find_master_key(ci->ci_inode->i_sb, &mk_spec); if (IS_ERR(key)) { diff --git a/fs/crypto/policy.c b/fs/crypto/policy.c index ed3d623724cdd..2a11276913a98 100644 --- a/fs/crypto/policy.c +++ b/fs/crypto/policy.c @@ -32,6 +32,26 @@ bool fscrypt_policies_equal(const union fscrypt_policy *policy1, return !memcmp(policy1, policy2, fscrypt_policy_size(policy1)); } +int fscrypt_policy_to_key_spec(const union fscrypt_policy *policy, + struct fscrypt_key_specifier *key_spec) +{ + switch (policy->version) { + case FSCRYPT_POLICY_V1: + key_spec->type = FSCRYPT_KEY_SPEC_TYPE_DESCRIPTOR; + memcpy(key_spec->u.descriptor, policy->v1.master_key_descriptor, + FSCRYPT_KEY_DESCRIPTOR_SIZE); + return 0; + case FSCRYPT_POLICY_V2: + key_spec->type = FSCRYPT_KEY_SPEC_TYPE_IDENTIFIER; + memcpy(key_spec->u.identifier, policy->v2.master_key_identifier, + FSCRYPT_KEY_IDENTIFIER_SIZE); + return 0; + default: + WARN_ON(1); + return -EINVAL; + } +} + static const union fscrypt_policy * fscrypt_get_dummy_policy(struct super_block *sb) { -- 2.36.0