diff options
| 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 /include | |
| parent | 1bfaac7c53f5cfe9c44d2093263fa50630a81b63 (diff) | |
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 'include')
| -rw-r--r-- | include/crypto/gcm.h | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/include/crypto/gcm.h b/include/crypto/gcm.h index c50e057ea17e..9d7eff04f224 100644 --- a/include/crypto/gcm.h +++ b/include/crypto/gcm.h @@ -1,8 +1,63 @@ #ifndef _CRYPTO_GCM_H #define _CRYPTO_GCM_H +#include <linux/errno.h> + #define GCM_AES_IV_SIZE 12 #define GCM_RFC4106_IV_SIZE 8 #define GCM_RFC4543_IV_SIZE 8 +/* + * validate authentication tag for GCM + */ +static inline int crypto_gcm_check_authsize(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; +} + +/* + * validate authentication tag for RFC4106 + */ +static inline int crypto_rfc4106_check_authsize(unsigned int authsize) +{ + switch (authsize) { + case 8: + case 12: + case 16: + break; + default: + return -EINVAL; + } + + return 0; +} + +/* + * validate assoclen for RFC4106/RFC4543 + */ +static inline int crypto_ipsec_check_assoclen(unsigned int assoclen) +{ + switch (assoclen) { + case 16: + case 20: + break; + default: + return -EINVAL; + } + + return 0; +} #endif |