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| author | Stephan Mueller <smueller@chronox.de> | 2014-12-07 23:21:42 +0100 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2014-12-22 23:02:37 +1100 |
| commit | 25fb8638e919bc7431a73f2fb4a9713818ae2c9d (patch) | |
| tree | 417415438d68774c5bf0dfe8604159870d529013 | |
| parent | 905b42e559fa4952569b3444bc6c054c0103e5a0 (diff) | |
| download | lwn-25fb8638e919bc7431a73f2fb4a9713818ae2c9d.tar.gz lwn-25fb8638e919bc7431a73f2fb4a9713818ae2c9d.zip | |
crypto: af_alg - add setsockopt for auth tag size
Use setsockopt on the tfm FD to provide the authentication tag size for
an AEAD cipher. This is achieved by adding a callback function which is
intended to be used by the AEAD AF_ALG implementation.
The optlen argument of the setsockopt specifies the authentication tag
size to be used with the AEAD tfm.
Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| -rw-r--r-- | crypto/af_alg.c | 7 | ||||
| -rw-r--r-- | include/crypto/if_alg.h | 1 |
2 files changed, 8 insertions, 0 deletions
diff --git a/crypto/af_alg.c b/crypto/af_alg.c index 8ffc174a0154..a8ff3c44e13c 100644 --- a/crypto/af_alg.c +++ b/crypto/af_alg.c @@ -215,6 +215,13 @@ static int alg_setsockopt(struct socket *sock, int level, int optname, goto unlock; err = alg_setkey(sk, optval, optlen); + break; + case ALG_SET_AEAD_AUTHSIZE: + if (sock->state == SS_CONNECTED) + goto unlock; + if (!type->setauthsize) + goto unlock; + err = type->setauthsize(ask->private, optlen); } unlock: diff --git a/include/crypto/if_alg.h b/include/crypto/if_alg.h index cd62bf4289e9..5c7b6c53e96f 100644 --- a/include/crypto/if_alg.h +++ b/include/crypto/if_alg.h @@ -50,6 +50,7 @@ struct af_alg_type { void (*release)(void *private); int (*setkey)(void *private, const u8 *key, unsigned int keylen); int (*accept)(void *private, struct sock *sk); + int (*setauthsize)(void *private, unsigned int authsize); struct proto_ops *ops; struct module *owner; |