Commit 24cbcc94 authored by Thara Gopinath's avatar Thara Gopinath Committed by Herbert Xu
Browse files

crypto: qce - 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: default avatarBjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: default avatarThara Gopinath <thara.gopinath@linaro.org>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 25b71d61

drivers/crypto/qce/common.c

+4 −4
Original line number Diff line number Diff line
@@ -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,