Commit 25fb8638 authored by Stephan Mueller's avatar Stephan Mueller Committed by Herbert Xu
Browse files

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: default avatarStephan Mueller <smueller@chronox.de>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 905b42e5

crypto/af_alg.c

+7 −0
Original line number Diff line number Diff line
@@ -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:

include/crypto/if_alg.h

+1 −0
Original line number Diff line number Diff line
@@ -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;