crypto: af_alg - add setsockopt for auth tag size (25fb8638) · Commits · 戴 / test

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>

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;

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