crypto: ccree - use crypto_ipsec_check_assoclen()

Use crypto_ipsec_check_assoclen() instead of home grown functions.
Clean up some unneeded code as a result. Delete stale comments
while we're at it.

Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/drivers/crypto/ccree/cc_aead.c b/drivers/crypto/ccree/cc_aead.c
index cce103e3b8224bdbe9c9c9367f7bba74b1bab306..ede16e37d45313f77eecc79ef80bcf2dd075fdd5 100644 (file)
--- a/drivers/crypto/ccree/cc_aead.c
+++ b/drivers/crypto/ccree/cc_aead.c
@@ -6,6 +6,8 @@
 #include <crypto/algapi.h>
 #include <crypto/internal/aead.h>
 #include <crypto/authenc.h>
+#include <crypto/gcm.h>
+#include <linux/rtnetlink.h>
 #include <crypto/internal/des.h>
 #include <linux/rtnetlink.h>
 #include "cc_driver.h"
@@ -60,11 +62,6 @@ struct cc_aead_ctx {
        enum drv_hash_mode auth_mode;
 };
 
-static inline bool valid_assoclen(struct aead_request *req)
-{
-       return ((req->assoclen == 16) || (req->assoclen == 20));
-}
-
 static void cc_aead_exit(struct crypto_aead *tfm)
 {
        struct cc_aead_ctx *ctx = crypto_aead_ctx(tfm);
@@ -2050,15 +2047,11 @@ static int cc_rfc4309_ccm_encrypt(struct aead_request *req)
        /* Very similar to cc_aead_encrypt() above. */
 
        struct aead_req_ctx *areq_ctx = aead_request_ctx(req);
-       struct crypto_aead *tfm = crypto_aead_reqtfm(req);
-       struct cc_aead_ctx *ctx = crypto_aead_ctx(tfm);
-       struct device *dev = drvdata_to_dev(ctx->drvdata);
-       int rc = -EINVAL;
+       int rc;
 
-       if (!valid_assoclen(req)) {
-               dev_dbg(dev, "invalid Assoclen:%u\n", req->assoclen);
+       rc = crypto_ipsec_check_assoclen(req->assoclen);
+       if (rc)
                goto out;
-       }
 
        memset(areq_ctx, 0, sizeof(*areq_ctx));
 
@@ -2099,16 +2092,12 @@ static int cc_aead_decrypt(struct aead_request *req)
 
 static int cc_rfc4309_ccm_decrypt(struct aead_request *req)
 {
-       struct crypto_aead *tfm = crypto_aead_reqtfm(req);
-       struct cc_aead_ctx *ctx = crypto_aead_ctx(tfm);
-       struct device *dev = drvdata_to_dev(ctx->drvdata);
        struct aead_req_ctx *areq_ctx = aead_request_ctx(req);
-       int rc = -EINVAL;
+       int rc;
 
-       if (!valid_assoclen(req)) {
-               dev_dbg(dev, "invalid Assoclen:%u\n", req->assoclen);
+       rc = crypto_ipsec_check_assoclen(req->assoclen);
+       if (rc)
                goto out;
-       }
 
        memset(areq_ctx, 0, sizeof(*areq_ctx));
 
@@ -2216,18 +2205,12 @@ static int cc_rfc4543_gcm_setauthsize(struct crypto_aead *authenc,
 
 static int cc_rfc4106_gcm_encrypt(struct aead_request *req)
 {
-       /* Very similar to cc_aead_encrypt() above. */
-
-       struct crypto_aead *tfm = crypto_aead_reqtfm(req);
-       struct cc_aead_ctx *ctx = crypto_aead_ctx(tfm);
-       struct device *dev = drvdata_to_dev(ctx->drvdata);
        struct aead_req_ctx *areq_ctx = aead_request_ctx(req);
-       int rc = -EINVAL;
+       int rc;
 
-       if (!valid_assoclen(req)) {
-               dev_dbg(dev, "invalid Assoclen:%u\n", req->assoclen);
+       rc = crypto_ipsec_check_assoclen(req->assoclen);
+       if (rc)
                goto out;
-       }
 
        memset(areq_ctx, 0, sizeof(*areq_ctx));
 
@@ -2248,17 +2231,12 @@ out:
 
 static int cc_rfc4543_gcm_encrypt(struct aead_request *req)
 {
-       /* Very similar to cc_aead_encrypt() above. */
-       struct crypto_aead *tfm = crypto_aead_reqtfm(req);
-       struct cc_aead_ctx *ctx = crypto_aead_ctx(tfm);
-       struct device *dev = drvdata_to_dev(ctx->drvdata);
        struct aead_req_ctx *areq_ctx = aead_request_ctx(req);
-       int rc = -EINVAL;
+       int rc;
 
-       if (!valid_assoclen(req)) {
-               dev_dbg(dev, "invalid Assoclen:%u\n", req->assoclen);
+       rc = crypto_ipsec_check_assoclen(req->assoclen);
+       if (rc)
                goto out;
-       }
 
        memset(areq_ctx, 0, sizeof(*areq_ctx));
 
@@ -2281,18 +2259,12 @@ out:
 
 static int cc_rfc4106_gcm_decrypt(struct aead_request *req)
 {
-       /* Very similar to cc_aead_decrypt() above. */
-
-       struct crypto_aead *tfm = crypto_aead_reqtfm(req);
-       struct cc_aead_ctx *ctx = crypto_aead_ctx(tfm);
-       struct device *dev = drvdata_to_dev(ctx->drvdata);
        struct aead_req_ctx *areq_ctx = aead_request_ctx(req);
-       int rc = -EINVAL;
+       int rc;
 
-       if (!valid_assoclen(req)) {
-               dev_dbg(dev, "invalid Assoclen:%u\n", req->assoclen);
+       rc = crypto_ipsec_check_assoclen(req->assoclen);
+       if (rc)
                goto out;
-       }
 
        memset(areq_ctx, 0, sizeof(*areq_ctx));
 
@@ -2313,17 +2285,12 @@ out:
 
 static int cc_rfc4543_gcm_decrypt(struct aead_request *req)
 {
-       /* Very similar to cc_aead_decrypt() above. */
-       struct crypto_aead *tfm = crypto_aead_reqtfm(req);
-       struct cc_aead_ctx *ctx = crypto_aead_ctx(tfm);
-       struct device *dev = drvdata_to_dev(ctx->drvdata);
        struct aead_req_ctx *areq_ctx = aead_request_ctx(req);
-       int rc = -EINVAL;
+       int rc;
 
-       if (!valid_assoclen(req)) {
-               dev_dbg(dev, "invalid Assoclen:%u\n", req->assoclen);
+       rc = crypto_ipsec_check_assoclen(req->assoclen);
+       if (rc)
                goto out;
-       }
 
        memset(areq_ctx, 0, sizeof(*areq_ctx));