linux-kernel - [PATCH v6 09/11] crypto: qce: common: Set data unit size to message length for AES XTS transformation

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Sun,  7 Feb 2021 09:39:44 -0500
From:   Thara Gopinath <thara.gopinath@...aro.org>
To:     herbert@...dor.apana.org.au, davem@...emloft.net,
        bjorn.andersson@...aro.org
Cc:     ebiggers@...gle.com, ardb@...nel.org, sivaprak@...eaurora.org,
        linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v6 09/11] crypto: qce: common: Set data unit size to message length for AES XTS transformation

Set the register REG_ENCR_XTS_DU_SIZE to cryptlen for AES XTS
transformation. Anything else causes the engine to return back
wrong results.

Acked-by: Bjorn Andersson <bjorn.andersson@...aro.org>
Signed-off-by: Thara Gopinath <thara.gopinath@...aro.org>
---
 drivers/crypto/qce/common.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/crypto/qce/common.c b/drivers/crypto/qce/common.c
index a73db2a5637f..f7bc701a4aa2 100644
--- a/drivers/crypto/qce/common.c
+++ b/drivers/crypto/qce/common.c
@@ -295,15 +295,15 @@ static void qce_xtskey(struct qce_device *qce, const u8 *enckey,
 {
 	u32 xtskey[QCE_MAX_CIPHER_KEY_SIZE / sizeof(u32)] = {0};
 	unsigned int xtsklen = enckeylen / (2 * sizeof(u32));
-	unsigned int xtsdusize;
 
 	qce_cpu_to_be32p_array((__be32 *)xtskey, enckey + enckeylen / 2,
 			       enckeylen / 2);
 	qce_write_array(qce, REG_ENCR_XTS_KEY0, xtskey, xtsklen);
 
-	/* xts du size 512B */
-	xtsdusize = min_t(u32, QCE_SECTOR_SIZE, cryptlen);
-	qce_write(qce, REG_ENCR_XTS_DU_SIZE, xtsdusize);
+	/* Set data unit size to cryptlen. Anything else causes
+	 * crypto engine to return back incorrect results.
+	 */
+	qce_write(qce, REG_ENCR_XTS_DU_SIZE, cryptlen);
 }
 
 static int qce_setup_regs_skcipher(struct crypto_async_request *async_req,
-- 
2.25.1