diff options
Diffstat (limited to 'package/mac80211/patches/017-nl80211-add-key-mgmt.patch')
| -rw-r--r-- | package/mac80211/patches/017-nl80211-add-key-mgmt.patch | 470 |
1 files changed, 470 insertions, 0 deletions
diff --git a/package/mac80211/patches/017-nl80211-add-key-mgmt.patch b/package/mac80211/patches/017-nl80211-add-key-mgmt.patch new file mode 100644 index 0000000..f5b1d45 --- /dev/null +++ b/package/mac80211/patches/017-nl80211-add-key-mgmt.patch @@ -0,0 +1,470 @@ +Subject: cfg80211/nl80211: introduce key handling + +This introduces key handling to cfg80211/nl80211. Default +and group keys can be added, changed and removed; sequence +counters for each key can be retrieved. + +Signed-off-by: Johannes Berg <johannes@sipsolutions.net> + +--- + include/linux/nl80211.h | 34 +++++ + include/net/cfg80211.h | 44 +++++++ + net/wireless/core.c | 3 + net/wireless/nl80211.c | 289 ++++++++++++++++++++++++++++++++++++++++++++++++ + 4 files changed, 370 insertions(+) + +--- everything.orig/include/linux/nl80211.h 2007-10-30 15:33:43.587381346 +0100 ++++ everything/include/linux/nl80211.h 2007-11-07 13:19:37.861516599 +0100 +@@ -37,6 +37,16 @@ + * userspace to request deletion of a virtual interface, then requires + * attribute %NL80211_ATTR_IFINDEX. + * ++ * @NL80211_CMD_GET_KEY: Get sequence counter information for a key specified ++ * by %NL80211_ATTR_KEY_IDX and/or %NL80211_ATTR_MAC. ++ * @NL80211_CMD_SET_KEY: Set key attributes %NL80211_ATTR_KEY_DEFAULT or ++ * %NL80211_ATTR_KEY_THRESHOLD. ++ * @NL80211_CMD_NEW_KEY: add a key with given %NL80211_ATTR_KEY_DATA, ++ * %NL80211_ATTR_KEY_IDX, %NL80211_ATTR_MAC and %NL80211_ATTR_KEY_CIPHER ++ * attributes. ++ * @NL80211_CMD_DEL_KEY: delete a key identified by %NL80211_ATTR_KEY_IDX ++ * or %NL80211_ATTR_MAC. ++ * + * @NL80211_CMD_MAX: highest used command number + * @__NL80211_CMD_AFTER_LAST: internal use + */ +@@ -54,6 +64,11 @@ enum nl80211_commands { + NL80211_CMD_NEW_INTERFACE, + NL80211_CMD_DEL_INTERFACE, + ++ NL80211_CMD_GET_KEY, ++ NL80211_CMD_SET_KEY, ++ NL80211_CMD_NEW_KEY, ++ NL80211_CMD_DEL_KEY, ++ + /* add commands here */ + + /* used to define NL80211_CMD_MAX below */ +@@ -75,6 +90,17 @@ enum nl80211_commands { + * @NL80211_ATTR_IFNAME: network interface name + * @NL80211_ATTR_IFTYPE: type of virtual interface, see &enum nl80211_iftype + * ++ * @NL80211_ATTR_MAC: MAC address (various uses) ++ * ++ * @NL80211_ATTR_KEY_DATA: (temporal) key data; for TKIP this consists of ++ * 16 bytes encryption key followed by 8 bytes each for TX and RX MIC ++ * keys ++ * @NL80211_ATTR_KEY_IDX: key ID (u8, 0-3) ++ * @NL80211_ATTR_KEY_CIPHER: key cipher suite (u32, as defined by IEEE 802.11 ++ * section 7.3.2.25.1, e.g. 0x000FAC04) ++ * @NL80211_ATTR_KEY_SEQ: transmit key sequence number (IV/PN) for TKIP and ++ * CCMP keys, each six bytes in little endian ++ * + * @NL80211_ATTR_MAX: highest attribute number currently defined + * @__NL80211_ATTR_AFTER_LAST: internal use + */ +@@ -89,6 +115,14 @@ enum nl80211_attrs { + NL80211_ATTR_IFNAME, + NL80211_ATTR_IFTYPE, + ++ NL80211_ATTR_MAC, ++ ++ NL80211_ATTR_KEY_DATA, ++ NL80211_ATTR_KEY_IDX, ++ NL80211_ATTR_KEY_CIPHER, ++ NL80211_ATTR_KEY_SEQ, ++ NL80211_ATTR_KEY_DEFAULT, ++ + /* add attributes here, update the policy in nl80211.c */ + + __NL80211_ATTR_AFTER_LAST, +--- everything.orig/net/wireless/nl80211.c 2007-10-30 15:33:43.637380153 +0100 ++++ everything/net/wireless/nl80211.c 2007-11-07 13:19:38.201511066 +0100 +@@ -61,6 +61,14 @@ static struct nla_policy nl80211_policy[ + [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 }, + [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 }, + [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 }, ++ ++ [NL80211_ATTR_MAC] = { .type = NLA_BINARY, .len = ETH_ALEN }, ++ ++ [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY, ++ .len = WLAN_MAX_KEY_LEN }, ++ [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 }, ++ [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 }, ++ [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG }, + }; + + /* message building helper */ +@@ -335,6 +343,263 @@ static int nl80211_del_interface(struct + return err; + } + ++struct get_key_cookie { ++ struct sk_buff *msg; ++ int error; ++}; ++ ++static void get_key_callback(void *c, struct key_params *params) ++{ ++ struct get_key_cookie *cookie = c; ++ ++ if (params->key) ++ NLA_PUT(cookie->msg, NL80211_ATTR_KEY_DATA, ++ params->key_len, params->key); ++ ++ if (params->seq) ++ NLA_PUT(cookie->msg, NL80211_ATTR_KEY_SEQ, ++ params->seq_len, params->seq); ++ ++ if (params->cipher) ++ NLA_PUT_U32(cookie->msg, NL80211_ATTR_KEY_CIPHER, ++ params->cipher); ++ ++ return; ++ nla_put_failure: ++ cookie->error = 1; ++} ++ ++static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info) ++{ ++ struct cfg80211_registered_device *drv; ++ int err; ++ struct net_device *dev; ++ u8 key_idx = 0; ++ u8 *mac_addr = NULL; ++ struct get_key_cookie cookie = { ++ .error = 0, ++ }; ++ void *hdr; ++ struct sk_buff *msg; ++ ++ if (info->attrs[NL80211_ATTR_KEY_IDX]) ++ key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]); ++ ++ if (key_idx > 3) ++ return -EINVAL; ++ ++ if (info->attrs[NL80211_ATTR_MAC]) ++ mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]); ++ ++ err = get_drv_dev_by_info_ifindex(info, &drv, &dev); ++ if (err) ++ return err; ++ ++ if (!drv->ops->get_key) { ++ err = -EOPNOTSUPP; ++ goto out; ++ } ++ ++ msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); ++ if (!msg) { ++ err = -ENOMEM; ++ goto out; ++ } ++ ++ hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0, ++ NL80211_CMD_NEW_KEY); ++ ++ if (IS_ERR(hdr)) { ++ err = PTR_ERR(hdr); ++ goto out; ++ } ++ ++ cookie.msg = msg; ++ ++ NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex); ++ NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx); ++ if (mac_addr) ++ NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr); ++ ++ rtnl_lock(); ++ err = drv->ops->get_key(&drv->wiphy, dev, key_idx, mac_addr, ++ &cookie, get_key_callback); ++ rtnl_unlock(); ++ ++ if (err) ++ goto out; ++ ++ if (cookie.error) ++ goto nla_put_failure; ++ ++ genlmsg_end(msg, hdr); ++ err = genlmsg_unicast(msg, info->snd_pid); ++ goto out; ++ ++ nla_put_failure: ++ err = -ENOBUFS; ++ nlmsg_free(msg); ++ out: ++ cfg80211_put_dev(drv); ++ dev_put(dev); ++ return err; ++} ++ ++static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info) ++{ ++ struct cfg80211_registered_device *drv; ++ int err; ++ struct net_device *dev; ++ u8 key_idx; ++ ++ if (!info->attrs[NL80211_ATTR_KEY_IDX]) ++ return -EINVAL; ++ ++ key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]); ++ ++ if (key_idx > 3) ++ return -EINVAL; ++ ++ /* currently only support setting default key */ ++ if (!info->attrs[NL80211_ATTR_KEY_DEFAULT]) ++ return -EINVAL; ++ ++ err = get_drv_dev_by_info_ifindex(info, &drv, &dev); ++ if (err) ++ return err; ++ ++ if (!drv->ops->set_default_key) { ++ err = -EOPNOTSUPP; ++ goto out; ++ } ++ ++ rtnl_lock(); ++ err = drv->ops->set_default_key(&drv->wiphy, dev, key_idx); ++ rtnl_unlock(); ++ ++ out: ++ cfg80211_put_dev(drv); ++ dev_put(dev); ++ return err; ++} ++ ++static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info) ++{ ++ struct cfg80211_registered_device *drv; ++ int err; ++ struct net_device *dev; ++ struct key_params params; ++ u8 key_idx = 0; ++ u8 *mac_addr = NULL; ++ ++ memset(¶ms, 0, sizeof(params)); ++ ++ if (!info->attrs[NL80211_ATTR_KEY_CIPHER]) ++ return -EINVAL; ++ ++ if (info->attrs[NL80211_ATTR_KEY_DATA]) { ++ params.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]); ++ params.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]); ++ } ++ ++ if (info->attrs[NL80211_ATTR_KEY_IDX]) ++ key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]); ++ ++ params.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]); ++ ++ if (info->attrs[NL80211_ATTR_MAC]) ++ mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]); ++ ++ if (key_idx > 3) ++ return -EINVAL; ++ ++ /* ++ * Disallow pairwise keys with non-zero index unless it's WEP ++ * (because current deployments use pairwise WEP keys with ++ * non-zero indizes but 802.11i clearly specifies to use zero) ++ */ ++ if (mac_addr && key_idx && ++ params.cipher != WLAN_CIPHER_SUITE_WEP40 && ++ params.cipher != WLAN_CIPHER_SUITE_WEP104) ++ return -EINVAL; ++ ++ /* TODO: add definitions for the lengths to linux/ieee80211.h */ ++ switch (params.cipher) { ++ case WLAN_CIPHER_SUITE_WEP40: ++ if (params.key_len != 5) ++ return -EINVAL; ++ break; ++ case WLAN_CIPHER_SUITE_TKIP: ++ if (params.key_len != 32) ++ return -EINVAL; ++ break; ++ case WLAN_CIPHER_SUITE_CCMP: ++ if (params.key_len != 16) ++ return -EINVAL; ++ break; ++ case WLAN_CIPHER_SUITE_WEP104: ++ if (params.key_len != 13) ++ return -EINVAL; ++ break; ++ default: ++ return -EINVAL; ++ } ++ ++ err = get_drv_dev_by_info_ifindex(info, &drv, &dev); ++ if (err) ++ return err; ++ ++ if (!drv->ops->add_key) { ++ err = -EOPNOTSUPP; ++ goto out; ++ } ++ ++ rtnl_lock(); ++ err = drv->ops->add_key(&drv->wiphy, dev, key_idx, mac_addr, ¶ms); ++ rtnl_unlock(); ++ ++ out: ++ cfg80211_put_dev(drv); ++ dev_put(dev); ++ return err; ++} ++ ++static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info) ++{ ++ struct cfg80211_registered_device *drv; ++ int err; ++ struct net_device *dev; ++ u8 key_idx = 0; ++ u8 *mac_addr = NULL; ++ ++ if (info->attrs[NL80211_ATTR_KEY_IDX]) ++ key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]); ++ ++ if (key_idx > 3) ++ return -EINVAL; ++ ++ if (info->attrs[NL80211_ATTR_MAC]) ++ mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]); ++ ++ err = get_drv_dev_by_info_ifindex(info, &drv, &dev); ++ if (err) ++ return err; ++ ++ if (!drv->ops->del_key) { ++ err = -EOPNOTSUPP; ++ goto out; ++ } ++ ++ rtnl_lock(); ++ err = drv->ops->del_key(&drv->wiphy, dev, key_idx, mac_addr); ++ rtnl_unlock(); ++ ++ out: ++ cfg80211_put_dev(drv); ++ dev_put(dev); ++ return err; ++} ++ + static struct genl_ops nl80211_ops[] = { + { + .cmd = NL80211_CMD_GET_WIPHY, +@@ -374,6 +639,30 @@ static struct genl_ops nl80211_ops[] = { + .policy = nl80211_policy, + .flags = GENL_ADMIN_PERM, + }, ++ { ++ .cmd = NL80211_CMD_GET_KEY, ++ .doit = nl80211_get_key, ++ .policy = nl80211_policy, ++ .flags = GENL_ADMIN_PERM, ++ }, ++ { ++ .cmd = NL80211_CMD_SET_KEY, ++ .doit = nl80211_set_key, ++ .policy = nl80211_policy, ++ .flags = GENL_ADMIN_PERM, ++ }, ++ { ++ .cmd = NL80211_CMD_NEW_KEY, ++ .doit = nl80211_new_key, ++ .policy = nl80211_policy, ++ .flags = GENL_ADMIN_PERM, ++ }, ++ { ++ .cmd = NL80211_CMD_DEL_KEY, ++ .doit = nl80211_del_key, ++ .policy = nl80211_policy, ++ .flags = GENL_ADMIN_PERM, ++ }, + }; + + /* multicast groups */ +--- everything.orig/net/wireless/core.c 2007-10-30 15:33:43.677380478 +0100 ++++ everything/net/wireless/core.c 2007-11-07 13:19:38.221513833 +0100 +@@ -184,6 +184,9 @@ struct wiphy *wiphy_new(struct cfg80211_ + struct cfg80211_registered_device *drv; + int alloc_size; + ++ WARN_ON(!ops->add_key && ops->del_key); ++ WARN_ON(ops->add_key && !ops->del_key); ++ + alloc_size = sizeof(*drv) + sizeof_priv; + + drv = kzalloc(alloc_size, GFP_KERNEL); +--- everything.orig/include/net/cfg80211.h 2007-10-30 15:33:43.617381780 +0100 ++++ everything/include/net/cfg80211.h 2007-11-07 13:19:38.231512748 +0100 +@@ -49,6 +49,26 @@ extern int ieee80211_radiotap_iterator_n + struct ieee80211_radiotap_iterator *iterator); + + ++ /** ++ * struct key_params - key information ++ * ++ * Information about a key ++ * ++ * @key: key material ++ * @key_len: length of key material ++ * @cipher: cipher suite selector ++ * @seq: sequence counter (IV/PN) for TKIP and CCMP keys, only used ++ * with the get_key() callback, must be in little endian, ++ * length given by @seq_len. ++ */ ++struct key_params { ++ u8 *key; ++ u8 *seq; ++ int key_len; ++ int seq_len; ++ u32 cipher; ++}; ++ + /* from net/wireless.h */ + struct wiphy; + +@@ -71,6 +91,18 @@ struct wiphy; + * + * @change_virtual_intf: change type of virtual interface + * ++ * @add_key: add a key with the given parameters. @mac_addr will be %NULL ++ * when adding a group key. ++ * ++ * @get_key: get information about the key with the given parameters. ++ * @mac_addr will be %NULL when requesting information for a group ++ * key. All pointers given to the @callback function need not be valid ++ * after it returns. ++ * ++ * @del_key: remove a key given the @mac_addr (%NULL for a group key) ++ * and @key_index ++ * ++ * @set_default_key: set the default key on an interface + */ + struct cfg80211_ops { + int (*add_virtual_intf)(struct wiphy *wiphy, char *name, +@@ -78,6 +110,18 @@ struct cfg80211_ops { + int (*del_virtual_intf)(struct wiphy *wiphy, int ifindex); + int (*change_virtual_intf)(struct wiphy *wiphy, int ifindex, + enum nl80211_iftype type); ++ ++ int (*add_key)(struct wiphy *wiphy, struct net_device *netdev, ++ u8 key_index, u8 *mac_addr, ++ struct key_params *params); ++ int (*get_key)(struct wiphy *wiphy, struct net_device *netdev, ++ u8 key_index, u8 *mac_addr, void *cookie, ++ void (*callback)(void *cookie, struct key_params*)); ++ int (*del_key)(struct wiphy *wiphy, struct net_device *netdev, ++ u8 key_index, u8 *mac_addr); ++ int (*set_default_key)(struct wiphy *wiphy, ++ struct net_device *netdev, ++ u8 key_index); + }; + + #endif /* __NET_CFG80211_H */ |