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Commit 7e50f84c authored by Jussi Kivilinna's avatar Jussi Kivilinna Committed by Steffen Klassert
Browse files

pf_key/xfrm_algo: prepare pf_key and xfrm_algo for new algorithms without pfkey support 



Mark existing algorithms as pfkey supported and make pfkey only use algorithms
that have pfkey_supported set.

Signed-off-by: default avatarJussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: default avatarSteffen Klassert <steffen.klassert@secunet.com>
parent cdfa1fe5

include/net/xfrm.h

+3 −2
Original line number Diff line number Diff line
@@ -1320,6 +1320,7 @@ struct xfrm_algo_desc { 
	char *name;

	char *compat;

	u8 available:1;

	u8 pfkey_supported:1;

	union {

		struct xfrm_algo_aead_info aead;

		struct xfrm_algo_auth_info auth;
@@ -1561,8 +1562,8 @@ extern void xfrm_input_init(void); 
extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);



extern void xfrm_probe_algs(void);

extern int xfrm_count_auth_supported(void);

extern int xfrm_count_enc_supported(void);

extern int xfrm_count_pfkey_auth_supported(void);

extern int xfrm_count_pfkey_enc_supported(void);

extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx);

extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx);

extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id);

net/key/af_key.c

+31 −8
Original line number Diff line number Diff line
@@ -815,18 +815,21 @@ static struct sk_buff *__pfkey_xfrm_state2msg(const struct xfrm_state *x, 
	sa->sadb_sa_auth = 0;

	if (x->aalg) {

		struct xfrm_algo_desc *a = xfrm_aalg_get_byname(x->aalg->alg_name, 0);

		sa->sadb_sa_auth = a ? a->desc.sadb_alg_id : 0;

		sa->sadb_sa_auth = (a && a->pfkey_supported) ?

					a->desc.sadb_alg_id : 0;

	}

	sa->sadb_sa_encrypt = 0;

	BUG_ON(x->ealg && x->calg);

	if (x->ealg) {

		struct xfrm_algo_desc *a = xfrm_ealg_get_byname(x->ealg->alg_name, 0);

		sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;

		sa->sadb_sa_encrypt = (a && a->pfkey_supported) ?

					a->desc.sadb_alg_id : 0;

	}

	/* KAME compatible: sadb_sa_encrypt is overloaded with calg id */

	if (x->calg) {

		struct xfrm_algo_desc *a = xfrm_calg_get_byname(x->calg->alg_name, 0);

		sa->sadb_sa_encrypt = a ? a->desc.sadb_alg_id : 0;

		sa->sadb_sa_encrypt = (a && a->pfkey_supported) ?

					a->desc.sadb_alg_id : 0;

	}



	sa->sadb_sa_flags = 0;
@@ -1137,7 +1140,7 @@ static struct xfrm_state * pfkey_msg2xfrm_state(struct net *net, 
	if (sa->sadb_sa_auth) {

		int keysize = 0;

		struct xfrm_algo_desc *a = xfrm_aalg_get_byid(sa->sadb_sa_auth);

		if (!a) {

		if (!a || !a->pfkey_supported) {

			err = -ENOSYS;

			goto out;

		}
@@ -1159,7 +1162,7 @@ static struct xfrm_state * pfkey_msg2xfrm_state(struct net *net, 
	if (sa->sadb_sa_encrypt) {

		if (hdr->sadb_msg_satype == SADB_X_SATYPE_IPCOMP) {

			struct xfrm_algo_desc *a = xfrm_calg_get_byid(sa->sadb_sa_encrypt);

			if (!a) {

			if (!a || !a->pfkey_supported) {

				err = -ENOSYS;

				goto out;

			}
@@ -1171,7 +1174,7 @@ static struct xfrm_state * pfkey_msg2xfrm_state(struct net *net, 
		} else {

			int keysize = 0;

			struct xfrm_algo_desc *a = xfrm_ealg_get_byid(sa->sadb_sa_encrypt);

			if (!a) {

			if (!a || !a->pfkey_supported) {

				err = -ENOSYS;

				goto out;

			}
@@ -1577,13 +1580,13 @@ static struct sk_buff *compose_sadb_supported(const struct sadb_msg *orig, 
	struct sadb_msg *hdr;

	int len, auth_len, enc_len, i;



	auth_len = xfrm_count_auth_supported();

	auth_len = xfrm_count_pfkey_auth_supported();

	if (auth_len) {

		auth_len *= sizeof(struct sadb_alg);

		auth_len += sizeof(struct sadb_supported);

	}



	enc_len = xfrm_count_enc_supported();

	enc_len = xfrm_count_pfkey_enc_supported();

	if (enc_len) {

		enc_len *= sizeof(struct sadb_alg);

		enc_len += sizeof(struct sadb_supported);
@@ -1614,6 +1617,8 @@ static struct sk_buff *compose_sadb_supported(const struct sadb_msg *orig, 
			struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);

			if (!aalg)

				break;

			if (!aalg->pfkey_supported)

				continue;

			if (aalg->available)

				*ap++ = aalg->desc;

		}
@@ -1633,6 +1638,8 @@ static struct sk_buff *compose_sadb_supported(const struct sadb_msg *orig, 
			struct xfrm_algo_desc *ealg = xfrm_ealg_get_byidx(i);

			if (!ealg)

				break;

			if (!ealg->pfkey_supported)

				continue;

			if (ealg->available)

				*ap++ = ealg->desc;

		}
@@ -2824,6 +2831,8 @@ static int count_ah_combs(const struct xfrm_tmpl *t) 
		const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(i);

		if (!aalg)

			break;

		if (!aalg->pfkey_supported)

			continue;

		if (aalg_tmpl_set(t, aalg) && aalg->available)

			sz += sizeof(struct sadb_comb);

	}
@@ -2839,6 +2848,9 @@ static int count_esp_combs(const struct xfrm_tmpl *t) 
		if (!ealg)

			break;



		if (!ealg->pfkey_supported)

			continue;



		if (!(ealg_tmpl_set(t, ealg) && ealg->available))

			continue;
@@ -2847,6 +2859,9 @@ static int count_esp_combs(const struct xfrm_tmpl *t) 
			if (!aalg)

				break;



			if (!aalg->pfkey_supported)

				continue;



			if (aalg_tmpl_set(t, aalg) && aalg->available)

				sz += sizeof(struct sadb_comb);

		}
@@ -2870,6 +2885,9 @@ static void dump_ah_combs(struct sk_buff *skb, const struct xfrm_tmpl *t) 
		if (!aalg)

			break;



		if (!aalg->pfkey_supported)

			continue;



		if (aalg_tmpl_set(t, aalg) && aalg->available) {

			struct sadb_comb *c;

			c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));
@@ -2902,6 +2920,9 @@ static void dump_esp_combs(struct sk_buff *skb, const struct xfrm_tmpl *t) 
		if (!ealg)

			break;



		if (!ealg->pfkey_supported)

			continue;



		if (!(ealg_tmpl_set(t, ealg) && ealg->available))

			continue;
@@ -2910,6 +2931,8 @@ static void dump_esp_combs(struct sk_buff *skb, const struct xfrm_tmpl *t) 
			const struct xfrm_algo_desc *aalg = xfrm_aalg_get_byidx(k);

			if (!aalg)

				break;

			if (!aalg->pfkey_supported)

				continue;

			if (!(aalg_tmpl_set(t, aalg) && aalg->available))

				continue;

			c = (struct sadb_comb*)skb_put(skb, sizeof(struct sadb_comb));

net/xfrm/xfrm_algo.c

+59 −6
Original line number Diff line number Diff line
@@ -35,6 +35,8 @@ static struct xfrm_algo_desc aead_list[] = { 
		}

	},



	.pfkey_supported = 1,



	.desc = {

		.sadb_alg_id = SADB_X_EALG_AES_GCM_ICV8,

		.sadb_alg_ivlen = 8,
@@ -51,6 +53,8 @@ static struct xfrm_algo_desc aead_list[] = { 
		}

	},



	.pfkey_supported = 1,



	.desc = {

		.sadb_alg_id = SADB_X_EALG_AES_GCM_ICV12,

		.sadb_alg_ivlen = 8,
@@ -67,6 +71,8 @@ static struct xfrm_algo_desc aead_list[] = { 
		}

	},



	.pfkey_supported = 1,



	.desc = {

		.sadb_alg_id = SADB_X_EALG_AES_GCM_ICV16,

		.sadb_alg_ivlen = 8,
@@ -83,6 +89,8 @@ static struct xfrm_algo_desc aead_list[] = { 
		}

	},



	.pfkey_supported = 1,



	.desc = {

		.sadb_alg_id = SADB_X_EALG_AES_CCM_ICV8,

		.sadb_alg_ivlen = 8,
@@ -99,6 +107,8 @@ static struct xfrm_algo_desc aead_list[] = { 
		}

	},



	.pfkey_supported = 1,



	.desc = {

		.sadb_alg_id = SADB_X_EALG_AES_CCM_ICV12,

		.sadb_alg_ivlen = 8,
@@ -115,6 +125,8 @@ static struct xfrm_algo_desc aead_list[] = { 
		}

	},



	.pfkey_supported = 1,



	.desc = {

		.sadb_alg_id = SADB_X_EALG_AES_CCM_ICV16,

		.sadb_alg_ivlen = 8,
@@ -131,6 +143,8 @@ static struct xfrm_algo_desc aead_list[] = { 
		}

	},



	.pfkey_supported = 1,



	.desc = {

		.sadb_alg_id = SADB_X_EALG_NULL_AES_GMAC,

		.sadb_alg_ivlen = 8,
@@ -151,6 +165,8 @@ static struct xfrm_algo_desc aalg_list[] = { 
		}

	},



	.pfkey_supported = 1,



	.desc = {

		.sadb_alg_id = SADB_X_AALG_NULL,

		.sadb_alg_ivlen = 0,
@@ -169,6 +185,8 @@ static struct xfrm_algo_desc aalg_list[] = { 
		}

	},



	.pfkey_supported = 1,



	.desc = {

		.sadb_alg_id = SADB_AALG_MD5HMAC,

		.sadb_alg_ivlen = 0,
@@ -187,6 +205,8 @@ static struct xfrm_algo_desc aalg_list[] = { 
		}

	},



	.pfkey_supported = 1,



	.desc = {

		.sadb_alg_id = SADB_AALG_SHA1HMAC,

		.sadb_alg_ivlen = 0,
@@ -205,6 +225,8 @@ static struct xfrm_algo_desc aalg_list[] = { 
		}

	},



	.pfkey_supported = 1,



	.desc = {

		.sadb_alg_id = SADB_X_AALG_SHA2_256HMAC,

		.sadb_alg_ivlen = 0,
@@ -222,6 +244,8 @@ static struct xfrm_algo_desc aalg_list[] = { 
		}

	},



	.pfkey_supported = 1,



	.desc = {

		.sadb_alg_id = SADB_X_AALG_SHA2_384HMAC,

		.sadb_alg_ivlen = 0,
@@ -239,6 +263,8 @@ static struct xfrm_algo_desc aalg_list[] = { 
		}

	},



	.pfkey_supported = 1,



	.desc = {

		.sadb_alg_id = SADB_X_AALG_SHA2_512HMAC,

		.sadb_alg_ivlen = 0,
@@ -257,6 +283,8 @@ static struct xfrm_algo_desc aalg_list[] = { 
		}

	},



	.pfkey_supported = 1,



	.desc = {

		.sadb_alg_id = SADB_X_AALG_RIPEMD160HMAC,

		.sadb_alg_ivlen = 0,
@@ -274,6 +302,8 @@ static struct xfrm_algo_desc aalg_list[] = { 
		}

	},



	.pfkey_supported = 1,



	.desc = {

		.sadb_alg_id = SADB_X_AALG_AES_XCBC_MAC,

		.sadb_alg_ivlen = 0,
@@ -295,6 +325,8 @@ static struct xfrm_algo_desc ealg_list[] = { 
		}

	},



	.pfkey_supported = 1,



	.desc = {

		.sadb_alg_id =	SADB_EALG_NULL,

		.sadb_alg_ivlen = 0,
@@ -313,6 +345,8 @@ static struct xfrm_algo_desc ealg_list[] = { 
		}

	},



	.pfkey_supported = 1,



	.desc = {

		.sadb_alg_id = SADB_EALG_DESCBC,

		.sadb_alg_ivlen = 8,
@@ -331,6 +365,8 @@ static struct xfrm_algo_desc ealg_list[] = { 
		}

	},



	.pfkey_supported = 1,



	.desc = {

		.sadb_alg_id = SADB_EALG_3DESCBC,

		.sadb_alg_ivlen = 8,
@@ -349,6 +385,8 @@ static struct xfrm_algo_desc ealg_list[] = { 
		}

	},



	.pfkey_supported = 1,



	.desc = {

		.sadb_alg_id = SADB_X_EALG_CASTCBC,

		.sadb_alg_ivlen = 8,
@@ -367,6 +405,8 @@ static struct xfrm_algo_desc ealg_list[] = { 
		}

	},



	.pfkey_supported = 1,



	.desc = {

		.sadb_alg_id = SADB_X_EALG_BLOWFISHCBC,

		.sadb_alg_ivlen = 8,
@@ -385,6 +425,8 @@ static struct xfrm_algo_desc ealg_list[] = { 
		}

	},



	.pfkey_supported = 1,



	.desc = {

		.sadb_alg_id = SADB_X_EALG_AESCBC,

		.sadb_alg_ivlen = 8,
@@ -403,6 +445,8 @@ static struct xfrm_algo_desc ealg_list[] = { 
		}

	},



	.pfkey_supported = 1,



	.desc = {

		.sadb_alg_id = SADB_X_EALG_SERPENTCBC,

		.sadb_alg_ivlen = 8,
@@ -421,6 +465,8 @@ static struct xfrm_algo_desc ealg_list[] = { 
		}

	},



	.pfkey_supported = 1,



	.desc = {

		.sadb_alg_id = SADB_X_EALG_CAMELLIACBC,

		.sadb_alg_ivlen = 8,
@@ -439,6 +485,8 @@ static struct xfrm_algo_desc ealg_list[] = { 
		}

	},



	.pfkey_supported = 1,



	.desc = {

		.sadb_alg_id = SADB_X_EALG_TWOFISHCBC,

		.sadb_alg_ivlen = 8,
@@ -456,6 +504,8 @@ static struct xfrm_algo_desc ealg_list[] = { 
		}

	},



	.pfkey_supported = 1,



	.desc = {

		.sadb_alg_id = SADB_X_EALG_AESCTR,

		.sadb_alg_ivlen	= 8,
@@ -473,6 +523,7 @@ static struct xfrm_algo_desc calg_list[] = { 
			.threshold = 90,

		}

	},

	.pfkey_supported = 1,

	.desc = { .sadb_alg_id = SADB_X_CALG_DEFLATE }

},

{
@@ -482,6 +533,7 @@ static struct xfrm_algo_desc calg_list[] = { 
			.threshold = 90,

		}

	},

	.pfkey_supported = 1,

	.desc = { .sadb_alg_id = SADB_X_CALG_LZS }

},

{
@@ -491,6 +543,7 @@ static struct xfrm_algo_desc calg_list[] = { 
			.threshold = 50,

		}

	},

	.pfkey_supported = 1,

	.desc = { .sadb_alg_id = SADB_X_CALG_LZJH }

},

};
@@ -714,27 +767,27 @@ void xfrm_probe_algs(void) 
}

EXPORT_SYMBOL_GPL(xfrm_probe_algs);



int xfrm_count_auth_supported(void)

int xfrm_count_pfkey_auth_supported(void)

{

	int i, n;



	for (i = 0, n = 0; i < aalg_entries(); i++)

		if (aalg_list[i].available)

		if (aalg_list[i].available && aalg_list[i].pfkey_supported)

			n++;

	return n;

}

EXPORT_SYMBOL_GPL(xfrm_count_auth_supported);

EXPORT_SYMBOL_GPL(xfrm_count_pfkey_auth_supported);



int xfrm_count_enc_supported(void)

int xfrm_count_pfkey_enc_supported(void)

{

	int i, n;



	for (i = 0, n = 0; i < ealg_entries(); i++)

		if (ealg_list[i].available)

		if (ealg_list[i].available && ealg_list[i].pfkey_supported)

			n++;

	return n;

}

EXPORT_SYMBOL_GPL(xfrm_count_enc_supported);

EXPORT_SYMBOL_GPL(xfrm_count_pfkey_enc_supported);



#if defined(CONFIG_INET_ESP) || defined(CONFIG_INET_ESP_MODULE) || defined(CONFIG_INET6_ESP) || defined(CONFIG_INET6_ESP_MODULE)