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Subject[PATCH v3 07/14] crypto: caam - check zero-length input
Date
Check zero-length input, for skcipher algorithm, to solve the extra
tests. This is a valid operation, therefore the API will return no error.

Signed-off-by: Iuliana Prodan <iuliana.prodan@nxp.com>
Reviewed-by: Horia Geanta <horia.geanta@nxp.com>
---
drivers/crypto/caam/caamalg.c | 6 ++++++
drivers/crypto/caam/caamalg_qi.c | 3 +++
drivers/crypto/caam/caamalg_qi2.c | 5 +++++
3 files changed, 14 insertions(+)

diff --git a/drivers/crypto/caam/caamalg.c b/drivers/crypto/caam/caamalg.c
index a5fcc31..b14a13b 100644
--- a/drivers/crypto/caam/caamalg.c
+++ b/drivers/crypto/caam/caamalg.c
@@ -1884,6 +1884,9 @@ static int skcipher_encrypt(struct skcipher_request *req)
u32 *desc;
int ret = 0;

+ if (!req->cryptlen)
+ return 0;
+
/* allocate extended descriptor */
edesc = skcipher_edesc_alloc(req, DESC_JOB_IO_LEN * CAAM_CMD_SZ);
if (IS_ERR(edesc))
@@ -1918,6 +1921,9 @@ static int skcipher_decrypt(struct skcipher_request *req)
u32 *desc;
int ret = 0;

+ if (!req->cryptlen)
+ return 0;
+
/* allocate extended descriptor */
edesc = skcipher_edesc_alloc(req, DESC_JOB_IO_LEN * CAAM_CMD_SZ);
if (IS_ERR(edesc))
diff --git a/drivers/crypto/caam/caamalg_qi.c b/drivers/crypto/caam/caamalg_qi.c
index b8de0a8..452467c 100644
--- a/drivers/crypto/caam/caamalg_qi.c
+++ b/drivers/crypto/caam/caamalg_qi.c
@@ -1443,6 +1443,9 @@ static inline int skcipher_crypt(struct skcipher_request *req, bool encrypt)
struct caam_ctx *ctx = crypto_skcipher_ctx(skcipher);
int ret;

+ if (!req->cryptlen)
+ return 0;
+
if (unlikely(caam_congested))
return -EAGAIN;

diff --git a/drivers/crypto/caam/caamalg_qi2.c b/drivers/crypto/caam/caamalg_qi2.c
index fb6c757..c1eca99 100644
--- a/drivers/crypto/caam/caamalg_qi2.c
+++ b/drivers/crypto/caam/caamalg_qi2.c
@@ -1498,6 +1498,9 @@ static int skcipher_encrypt(struct skcipher_request *req)
struct caam_request *caam_req = skcipher_request_ctx(req);
int ret;

+ if (!req->cryptlen)
+ return 0;
+
/* allocate extended descriptor */
edesc = skcipher_edesc_alloc(req);
if (IS_ERR(edesc))
@@ -1526,6 +1529,8 @@ static int skcipher_decrypt(struct skcipher_request *req)
struct caam_request *caam_req = skcipher_request_ctx(req);
int ret;

+ if (!req->cryptlen)
+ return 0;
/* allocate extended descriptor */
edesc = skcipher_edesc_alloc(req);
if (IS_ERR(edesc))
--
2.1.0
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