From: Iuliana Prodan <iuliana.prodan@nxp.com>
Date: Wed, 31 Jul 2019 16:08:06 +0300
Subject: crypto: caam - check authsize
Git-commit: 68a51394f37ae8c6eb51209efc406355a9861874
Patch-mainline: v5.4-rc1
References: jsc#SLE-16106

Check authsize to solve the extra tests that expect -EINVAL to be
returned when the authentication tag size is not valid.

Validated authsize for GCM, RFC4106 and RFC4543.

Signed-off-by: Iuliana Prodan <iuliana.prodan@nxp.com>
Reviewed-by: Horia Geanta <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
---
 drivers/crypto/caam/caamalg.c     | 13 +++++++++++++
 drivers/crypto/caam/caamalg_qi.c  | 13 +++++++++++++
 drivers/crypto/caam/caamalg_qi2.c | 13 +++++++++++++
 3 files changed, 39 insertions(+)

diff --git a/drivers/crypto/caam/caamalg.c b/drivers/crypto/caam/caamalg.c
index ce50ae1dc825..591906988a22 100644
--- a/drivers/crypto/caam/caamalg.c
+++ b/drivers/crypto/caam/caamalg.c
@@ -376,6 +376,11 @@ static int gcm_set_sh_desc(struct crypto_aead *aead)
 static int gcm_setauthsize(struct crypto_aead *authenc, unsigned int authsize)
 {
 	struct caam_ctx *ctx = crypto_aead_ctx(authenc);
+	int err;
+
+	err = crypto_gcm_check_authsize(authsize);
+	if (err)
+		return err;
 
 	ctx->authsize = authsize;
 	gcm_set_sh_desc(authenc);
@@ -439,6 +444,11 @@ static int rfc4106_setauthsize(struct crypto_aead *authenc,
 			       unsigned int authsize)
 {
 	struct caam_ctx *ctx = crypto_aead_ctx(authenc);
+	int err;
+
+	err = crypto_rfc4106_check_authsize(authsize);
+	if (err)
+		return err;
 
 	ctx->authsize = authsize;
 	rfc4106_set_sh_desc(authenc);
@@ -503,6 +513,9 @@ static int rfc4543_setauthsize(struct crypto_aead *authenc,
 {
 	struct caam_ctx *ctx = crypto_aead_ctx(authenc);
 
+	if (authsize != 16)
+		return -EINVAL;
+
 	ctx->authsize = authsize;
 	rfc4543_set_sh_desc(authenc);
 
diff --git a/drivers/crypto/caam/caamalg_qi.c b/drivers/crypto/caam/caamalg_qi.c
index b8854f268e5a..6c69f54d1f79 100644
--- a/drivers/crypto/caam/caamalg_qi.c
+++ b/drivers/crypto/caam/caamalg_qi.c
@@ -371,6 +371,11 @@ static int gcm_set_sh_desc(struct crypto_aead *aead)
 static int gcm_setauthsize(struct crypto_aead *authenc, unsigned int authsize)
 {
 	struct caam_ctx *ctx = crypto_aead_ctx(authenc);
+	int err;
+
+	err = crypto_gcm_check_authsize(authsize);
+	if (err)
+		return err;
 
 	ctx->authsize = authsize;
 	gcm_set_sh_desc(authenc);
@@ -472,6 +477,11 @@ static int rfc4106_setauthsize(struct crypto_aead *authenc,
 			       unsigned int authsize)
 {
 	struct caam_ctx *ctx = crypto_aead_ctx(authenc);
+	int err;
+
+	err = crypto_rfc4106_check_authsize(authsize);
+	if (err)
+		return err;
 
 	ctx->authsize = authsize;
 	rfc4106_set_sh_desc(authenc);
@@ -578,6 +588,9 @@ static int rfc4543_setauthsize(struct crypto_aead *authenc,
 {
 	struct caam_ctx *ctx = crypto_aead_ctx(authenc);
 
+	if (authsize != 16)
+		return -EINVAL;
+
 	ctx->authsize = authsize;
 	rfc4543_set_sh_desc(authenc);
 
diff --git a/drivers/crypto/caam/caamalg_qi2.c b/drivers/crypto/caam/caamalg_qi2.c
index 337150bdf3d1..141d6231e4b9 100644
--- a/drivers/crypto/caam/caamalg_qi2.c
+++ b/drivers/crypto/caam/caamalg_qi2.c
@@ -720,6 +720,11 @@ static int gcm_set_sh_desc(struct crypto_aead *aead)
 static int gcm_setauthsize(struct crypto_aead *authenc, unsigned int authsize)
 {
 	struct caam_ctx *ctx = crypto_aead_ctx(authenc);
+	int err;
+
+	err = crypto_gcm_check_authsize(authsize);
+	if (err)
+		return err;
 
 	ctx->authsize = authsize;
 	gcm_set_sh_desc(authenc);
@@ -812,6 +817,11 @@ static int rfc4106_setauthsize(struct crypto_aead *authenc,
 			       unsigned int authsize)
 {
 	struct caam_ctx *ctx = crypto_aead_ctx(authenc);
+	int err;
+
+	err = crypto_rfc4106_check_authsize(authsize);
+	if (err)
+		return err;
 
 	ctx->authsize = authsize;
 	rfc4106_set_sh_desc(authenc);
@@ -911,6 +921,9 @@ static int rfc4543_setauthsize(struct crypto_aead *authenc,
 {
 	struct caam_ctx *ctx = crypto_aead_ctx(authenc);
 
+	if (authsize != 16)
+		return -EINVAL;
+
 	ctx->authsize = authsize;
 	rfc4543_set_sh_desc(authenc);