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| author | Iuliana Prodan <iuliana.prodan@nxp.com> | 2019-07-31 16:05:54 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2019-08-09 15:11:41 +1000 |
| commit | 65526f638efc6435b9658d45a3ddd07e6fdbbb7d (patch) | |
| tree | fdcca374538f5484e5bafaf6b242f7d405cd763c /crypto/gcm.c | |
| parent | 1bfaac7c53f5cfe9c44d2093263fa50630a81b63 (diff) | |
| download | lwn-65526f638efc6435b9658d45a3ddd07e6fdbbb7d.tar.gz lwn-65526f638efc6435b9658d45a3ddd07e6fdbbb7d.zip | |
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.c | 41 |
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); |