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authorIuliana Prodan <iuliana.prodan@nxp.com>2019-07-31 16:05:54 +0300
committerHerbert Xu <herbert@gondor.apana.org.au>2019-08-09 15:11:41 +1000
commit65526f638efc6435b9658d45a3ddd07e6fdbbb7d (patch)
treefdcca374538f5484e5bafaf6b242f7d405cd763c /crypto/gcm.c
parent1bfaac7c53f5cfe9c44d2093263fa50630a81b63 (diff)
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crypto: gcm - helper functions for assoclen/authsize check
Added inline helper functions to check authsize and assoclen for gcm, rfc4106 and rfc4543. These are used in the generic implementation of gcm, rfc4106 and rfc4543. Signed-off-by: Iuliana Prodan <iuliana.prodan@nxp.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/gcm.c')
-rw-r--r--crypto/gcm.c41
1 files changed, 15 insertions, 26 deletions
diff --git a/crypto/gcm.c b/crypto/gcm.c
index f254e2d4c206..2f3b50f8f3e0 100644
--- a/crypto/gcm.c
+++ b/crypto/gcm.c
@@ -152,20 +152,7 @@ out:
static int crypto_gcm_setauthsize(struct crypto_aead *tfm,
unsigned int authsize)
{
- switch (authsize) {
- case 4:
- case 8:
- case 12:
- case 13:
- case 14:
- case 15:
- case 16:
- break;
- default:
- return -EINVAL;
- }
-
- return 0;
+ return crypto_gcm_check_authsize(authsize);
}
static void crypto_gcm_init_common(struct aead_request *req)
@@ -762,15 +749,11 @@ static int crypto_rfc4106_setauthsize(struct crypto_aead *parent,
unsigned int authsize)
{
struct crypto_rfc4106_ctx *ctx = crypto_aead_ctx(parent);
+ int err;
- switch (authsize) {
- case 8:
- case 12:
- case 16:
- break;
- default:
- return -EINVAL;
- }
+ err = crypto_rfc4106_check_authsize(authsize);
+ if (err)
+ return err;
return crypto_aead_setauthsize(ctx->child, authsize);
}
@@ -818,8 +801,11 @@ static struct aead_request *crypto_rfc4106_crypt(struct aead_request *req)
static int crypto_rfc4106_encrypt(struct aead_request *req)
{
- if (req->assoclen != 16 && req->assoclen != 20)
- return -EINVAL;
+ int err;
+
+ err = crypto_ipsec_check_assoclen(req->assoclen);
+ if (err)
+ return err;
req = crypto_rfc4106_crypt(req);
@@ -828,8 +814,11 @@ static int crypto_rfc4106_encrypt(struct aead_request *req)
static int crypto_rfc4106_decrypt(struct aead_request *req)
{
- if (req->assoclen != 16 && req->assoclen != 20)
- return -EINVAL;
+ int err;
+
+ err = crypto_ipsec_check_assoclen(req->assoclen);
+ if (err)
+ return err;
req = crypto_rfc4106_crypt(req);