diff options
Diffstat (limited to 'net/xfrm')
| -rw-r--r-- | net/xfrm/xfrm_algo.c | 138 | ||||
| -rw-r--r-- | net/xfrm/xfrm_user.c | 71 |
2 files changed, 206 insertions, 3 deletions
diff --git a/net/xfrm/xfrm_algo.c b/net/xfrm/xfrm_algo.c index 02e3ecf..6cc1525 100644 --- a/net/xfrm/xfrm_algo.c +++ b/net/xfrm/xfrm_algo.c @@ -28,6 +28,105 @@ * that instantiated crypto transforms have correct parameters for IPsec * purposes. */ +static struct xfrm_algo_desc aead_list[] = { +{ + .name = "rfc4106(gcm(aes))", + + .uinfo = { + .aead = { + .icv_truncbits = 64, + } + }, + + .desc = { + .sadb_alg_id = SADB_X_EALG_AES_GCM_ICV8, + .sadb_alg_ivlen = 8, + .sadb_alg_minbits = 128, + .sadb_alg_maxbits = 256 + } +}, +{ + .name = "rfc4106(gcm(aes))", + + .uinfo = { + .aead = { + .icv_truncbits = 96, + } + }, + + .desc = { + .sadb_alg_id = SADB_X_EALG_AES_GCM_ICV12, + .sadb_alg_ivlen = 8, + .sadb_alg_minbits = 128, + .sadb_alg_maxbits = 256 + } +}, +{ + .name = "rfc4106(gcm(aes))", + + .uinfo = { + .aead = { + .icv_truncbits = 128, + } + }, + + .desc = { + .sadb_alg_id = SADB_X_EALG_AES_GCM_ICV16, + .sadb_alg_ivlen = 8, + .sadb_alg_minbits = 128, + .sadb_alg_maxbits = 256 + } +}, +{ + .name = "rfc4309(ccm(aes))", + + .uinfo = { + .aead = { + .icv_truncbits = 64, + } + }, + + .desc = { + .sadb_alg_id = SADB_X_EALG_AES_CCM_ICV8, + .sadb_alg_ivlen = 8, + .sadb_alg_minbits = 128, + .sadb_alg_maxbits = 256 + } +}, +{ + .name = "rfc4309(ccm(aes))", + + .uinfo = { + .aead = { + .icv_truncbits = 96, + } + }, + + .desc = { + .sadb_alg_id = SADB_X_EALG_AES_CCM_ICV12, + .sadb_alg_ivlen = 8, + .sadb_alg_minbits = 128, + .sadb_alg_maxbits = 256 + } +}, +{ + .name = "rfc4309(ccm(aes))", + + .uinfo = { + .aead = { + .icv_truncbits = 128, + } + }, + + .desc = { + .sadb_alg_id = SADB_X_EALG_AES_CCM_ICV16, + .sadb_alg_ivlen = 8, + .sadb_alg_minbits = 128, + .sadb_alg_maxbits = 256 + } +}, +}; + static struct xfrm_algo_desc aalg_list[] = { { .name = "hmac(digest_null)", @@ -332,6 +431,11 @@ static struct xfrm_algo_desc calg_list[] = { }, }; +static inline int aead_entries(void) +{ + return ARRAY_SIZE(aead_list); +} + static inline int aalg_entries(void) { return ARRAY_SIZE(aalg_list); @@ -354,6 +458,13 @@ struct xfrm_algo_list { u32 mask; }; +static const struct xfrm_algo_list xfrm_aead_list = { + .algs = aead_list, + .entries = ARRAY_SIZE(aead_list), + .type = CRYPTO_ALG_TYPE_AEAD, + .mask = CRYPTO_ALG_TYPE_MASK, +}; + static const struct xfrm_algo_list xfrm_aalg_list = { .algs = aalg_list, .entries = ARRAY_SIZE(aalg_list), @@ -461,6 +572,33 @@ struct xfrm_algo_desc *xfrm_calg_get_byname(char *name, int probe) } EXPORT_SYMBOL_GPL(xfrm_calg_get_byname); +struct xfrm_aead_name { + const char *name; + int icvbits; +}; + +static int xfrm_aead_name_match(const struct xfrm_algo_desc *entry, + const void *data) +{ + const struct xfrm_aead_name *aead = data; + const char *name = aead->name; + + return aead->icvbits == entry->uinfo.aead.icv_truncbits && name && + !strcmp(name, entry->name); +} + +struct xfrm_algo_desc *xfrm_aead_get_byname(char *name, int icv_len, int probe) +{ + struct xfrm_aead_name data = { + .name = name, + .icvbits = icv_len, + }; + + return xfrm_find_algo(&xfrm_aead_list, xfrm_aead_name_match, &data, + probe); +} +EXPORT_SYMBOL_GPL(xfrm_aead_get_byname); + struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx) { if (idx >= aalg_entries()) diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c index e0ccdf2..7833807 100644 --- a/net/xfrm/xfrm_user.c +++ b/net/xfrm/xfrm_user.c @@ -31,6 +31,11 @@ #include <linux/in6.h> #endif +static inline int aead_len(struct xfrm_algo_aead *alg) +{ + return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); +} + static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type) { struct nlattr *rt = attrs[type]; @@ -68,6 +73,22 @@ static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type) return 0; } +static int verify_aead(struct nlattr **attrs) +{ + struct nlattr *rt = attrs[XFRMA_ALG_AEAD]; + struct xfrm_algo_aead *algp; + + if (!rt) + return 0; + + algp = nla_data(rt); + if (nla_len(rt) < aead_len(algp)) + return -EINVAL; + + algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0'; + return 0; +} + static void verify_one_addr(struct nlattr **attrs, enum xfrm_attr_type_t type, xfrm_address_t **addrp) { @@ -119,20 +140,28 @@ static int verify_newsa_info(struct xfrm_usersa_info *p, switch (p->id.proto) { case IPPROTO_AH: if (!attrs[XFRMA_ALG_AUTH] || + attrs[XFRMA_ALG_AEAD] || attrs[XFRMA_ALG_CRYPT] || attrs[XFRMA_ALG_COMP]) goto out; break; case IPPROTO_ESP: - if ((!attrs[XFRMA_ALG_AUTH] && - !attrs[XFRMA_ALG_CRYPT]) || - attrs[XFRMA_ALG_COMP]) + if (attrs[XFRMA_ALG_COMP]) + goto out; + if (!attrs[XFRMA_ALG_AUTH] && + !attrs[XFRMA_ALG_CRYPT] && + !attrs[XFRMA_ALG_AEAD]) + goto out; + if ((attrs[XFRMA_ALG_AUTH] || + attrs[XFRMA_ALG_CRYPT]) && + attrs[XFRMA_ALG_AEAD]) goto out; break; case IPPROTO_COMP: if (!attrs[XFRMA_ALG_COMP] || + attrs[XFRMA_ALG_AEAD] || attrs[XFRMA_ALG_AUTH] || attrs[XFRMA_ALG_CRYPT]) goto out; @@ -143,6 +172,7 @@ static int verify_newsa_info(struct xfrm_usersa_info *p, case IPPROTO_ROUTING: if (attrs[XFRMA_ALG_COMP] || attrs[XFRMA_ALG_AUTH] || + attrs[XFRMA_ALG_AEAD] || attrs[XFRMA_ALG_CRYPT] || attrs[XFRMA_ENCAP] || attrs[XFRMA_SEC_CTX] || @@ -155,6 +185,8 @@ static int verify_newsa_info(struct xfrm_usersa_info *p, goto out; } + if ((err = verify_aead(attrs))) + goto out; if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH))) goto out; if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT))) @@ -208,6 +240,31 @@ static int attach_one_algo(struct xfrm_algo **algpp, u8 *props, return 0; } +static int attach_aead(struct xfrm_algo_aead **algpp, u8 *props, + struct nlattr *rta) +{ + struct xfrm_algo_aead *p, *ualg; + struct xfrm_algo_desc *algo; + + if (!rta) + return 0; + + ualg = nla_data(rta); + + algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1); + if (!algo) + return -ENOSYS; + *props = algo->desc.sadb_alg_id; + + p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL); + if (!p) + return -ENOMEM; + + strcpy(p->alg_name, algo->name); + *algpp = p; + return 0; +} + static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx) { int len = 0; @@ -286,6 +343,9 @@ static struct xfrm_state *xfrm_state_construct(struct xfrm_usersa_info *p, copy_from_user_state(x, p); + if ((err = attach_aead(&x->aead, &x->props.ealgo, + attrs[XFRMA_ALG_AEAD]))) + goto error; if ((err = attach_one_algo(&x->aalg, &x->props.aalgo, xfrm_aalg_get_byname, attrs[XFRMA_ALG_AUTH]))) @@ -510,6 +570,8 @@ static int copy_to_user_state_extra(struct xfrm_state *x, if (x->lastused) NLA_PUT_U64(skb, XFRMA_LASTUSED, x->lastused); + if (x->aead) + NLA_PUT(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead); if (x->aalg) NLA_PUT(skb, XFRMA_ALG_AUTH, xfrm_alg_len(x->aalg), x->aalg); if (x->ealg) @@ -1808,6 +1870,7 @@ static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = { #undef XMSGSIZE static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = { + [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) }, [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) }, [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) }, [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) }, @@ -1972,6 +2035,8 @@ static int xfrm_notify_sa_flush(struct km_event *c) static inline size_t xfrm_sa_len(struct xfrm_state *x) { size_t l = 0; + if (x->aead) + l += nla_total_size(aead_len(x->aead)); if (x->aalg) l += nla_total_size(xfrm_alg_len(x->aalg)); if (x->ealg) |
