linux-kernel - [PATCH 07/13] fscrypto: simplify building key descriptor string

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Message-Id: <1459660924-2960-8-git-send-email-ebiggers3@gmail.com>
Date:	Sun,  3 Apr 2016 00:21:58 -0500
From:	Eric Biggers <ebiggers3@...il.com>
To:	linux-fsdevel@...r.kernel.org
Cc:	linux-f2fs-devel@...ts.sourceforge.net, linux-ext4@...r.kernel.org,
	linux-kernel@...r.kernel.org, jaegeuk@...nel.org, tytso@....edu,
	mhalcrow@...gle.com, Eric Biggers <ebiggers3@...il.com>
Subject: [PATCH 07/13] fscrypto: simplify building key descriptor string

Signed-off-by: Eric Biggers <ebiggers3@...il.com>
---
 fs/crypto/keyinfo.c | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/fs/crypto/keyinfo.c b/fs/crypto/keyinfo.c
index cb06351..5fcee4d 100644
--- a/fs/crypto/keyinfo.c
+++ b/fs/crypto/keyinfo.c
@@ -164,13 +164,8 @@ retry:
 		memset(raw_key, 0x42, FS_AES_256_XTS_KEY_SIZE);
 		goto got_key;
 	}
-	memcpy(full_key_descriptor, FS_KEY_DESC_PREFIX,
-					FS_KEY_DESC_PREFIX_SIZE);
-	sprintf(full_key_descriptor + FS_KEY_DESC_PREFIX_SIZE,
-					"%*phN", FS_KEY_DESCRIPTOR_SIZE,
-					ctx.master_key_descriptor);
-	full_key_descriptor[FS_KEY_DESC_PREFIX_SIZE +
-					(2 * FS_KEY_DESCRIPTOR_SIZE)] = '\0';
+	sprintf(full_key_descriptor, FS_KEY_DESC_PREFIX "%*phN",
+		FS_KEY_DESCRIPTOR_SIZE, ctx.master_key_descriptor);
 	keyring_key = request_key(&key_type_logon, full_key_descriptor, NULL);
 	if (IS_ERR(keyring_key)) {
 		res = PTR_ERR(keyring_key);
-- 
2.7.4