From: Joel Fernandes <joelf@ti.com>
Date: Tue, 29 Oct 2013 22:37:38 +0000 (-0500)
Subject: crypto: omap-aes - Fix CTR mode counter length
X-Git-Tag: v3.13-rc2~35^2~1
X-Git-Url: https://repo.jachan.dev/linux.git/commitdiff_plain/8ed49c7675e106bc23f34ac065d8add75e0e2f45

crypto: omap-aes - Fix CTR mode counter length

NIST vectors for CTR mode in testmgr.h assume the entire IV as the counter. To
get correct results that match the output of these vectors, we need to set the
counter length correctly.

Signed-off-by: Joel Fernandes <joelf@ti.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---

diff --git a/drivers/crypto/omap-aes.c b/drivers/crypto/omap-aes.c
index e1e58d0ed550..a9ccbf14096e 100644
--- a/drivers/crypto/omap-aes.c
+++ b/drivers/crypto/omap-aes.c
@@ -275,7 +275,7 @@ static int omap_aes_write_ctrl(struct omap_aes_dev *dd)
 	if (dd->flags & FLAGS_CBC)
 		val |= AES_REG_CTRL_CBC;
 	if (dd->flags & FLAGS_CTR) {
-		val |= AES_REG_CTRL_CTR | AES_REG_CTRL_CTR_WIDTH_32;
+		val |= AES_REG_CTRL_CTR | AES_REG_CTRL_CTR_WIDTH_128;
 		mask = AES_REG_CTRL_CTR | AES_REG_CTRL_CTR_WIDTH_MASK;
 	}
 	if (dd->flags & FLAGS_ENCRYPT)