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: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>

diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index 421f764..814a1ba 100644 (file)
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -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);

diff --git a/net/key/af_key.c b/net/key/af_key.c
index 6a6e684..cb75f9b 100644 (file)
--- a/net/key/af_key.c
+++ b/net/key/af_key.c
@@ -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));

diff --git a/net/xfrm/xfrm_algo.c b/net/xfrm/xfrm_algo.c
index f9a5495..6fb9d00 100644 (file)
--- a/net/xfrm/xfrm_algo.c
+++ b/net/xfrm/xfrm_algo.c
@@ -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)