wpa_ie.rar_RSN IE和WPA IE_WPA IE_linux RSN ie_rsn ie

/* * wpa_supplicant - WPA/RSN IE and KDE processing * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * Alternatively, this software may be distributed under the terms of BSD * license. * * See README and COPYING for more details. */ #include "includes.h" #include "common.h" #include "wpa.h" #include "pmksa_cache.h" #include "ieee802_11_defs.h" #include "wpa_i.h" #include "wpa_ie.h" static int wpa_selector_to_bitfield(const u8 *s) { if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_NONE) return WPA_CIPHER_NONE; if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_WEP40) return WPA_CIPHER_WEP40; if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_TKIP) return WPA_CIPHER_TKIP; if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_CCMP) return WPA_CIPHER_CCMP; if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_WEP104) return WPA_CIPHER_WEP104; return 0; } static int wpa_key_mgmt_to_bitfield(const u8 *s) { if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_UNSPEC_802_1X) return WPA_KEY_MGMT_IEEE8021X; if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X) return WPA_KEY_MGMT_PSK; if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_NONE) return WPA_KEY_MGMT_WPA_NONE; return 0; } static int wpa_parse_wpa_ie_wpa(const u8 *wpa_ie, size_t wpa_ie_len, struct wpa_ie_data *data) { const struct wpa_ie_hdr *hdr; const u8 *pos; int left; int i, count; os_memset(data, 0, sizeof(*data)); data->proto = WPA_PROTO_WPA; data->pairwise_cipher = WPA_CIPHER_TKIP; data->group_cipher = WPA_CIPHER_TKIP; data->key_mgmt = WPA_KEY_MGMT_IEEE8021X; data->capabilities = 0; data->pmkid = NULL; data->num_pmkid = 0; data->mgmt_group_cipher = 0; if (wpa_ie_len == 0) { /* No WPA IE - fail silently */ return -1; } if (wpa_ie_len < sizeof(struct wpa_ie_hdr)) { wpa_printf(MSG_DEBUG, "%s: ie len too short %lu", __func__, (unsigned long) wpa_ie_len); return -1; } hdr = (const struct wpa_ie_hdr *) wpa_ie; if (hdr->elem_id != WLAN_EID_VENDOR_SPECIFIC || hdr->len != wpa_ie_len - 2 || RSN_SELECTOR_GET(hdr->oui) != WPA_OUI_TYPE || WPA_GET_LE16(hdr->version) != WPA_VERSION) { wpa_printf(MSG_DEBUG, "%s: malformed ie or unknown version", __func__); return -1; } pos = (const u8 *) (hdr + 1); left = wpa_ie_len - sizeof(*hdr); if (left >= WPA_SELECTOR_LEN) { data->group_cipher = wpa_selector_to_bitfield(pos); pos += WPA_SELECTOR_LEN; left -= WPA_SELECTOR_LEN; } else if (left > 0) { wpa_printf(MSG_DEBUG, "%s: ie length mismatch, %u too much", __func__, left); return -1; } if (left >= 2) { data->pairwise_cipher = 0; count = WPA_GET_LE16(pos); pos += 2; left -= 2; if (count == 0 || left < count * WPA_SELECTOR_LEN) { wpa_printf(MSG_DEBUG, "%s: ie count botch (pairwise), " "count %u left %u", __func__, count, left); return -1; } for (i = 0; i < count; i++) { data->pairwise_cipher |= wpa_selector_to_bitfield(pos); pos += WPA_SELECTOR_LEN; left -= WPA_SELECTOR_LEN; } } else if (left == 1) { wpa_printf(MSG_DEBUG, "%s: ie too short (for key mgmt)", __func__); return -1; } if (left >= 2) { data->key_mgmt = 0; count = WPA_GET_LE16(pos); pos += 2; left -= 2; if (count == 0 || left < count * WPA_SELECTOR_LEN) { wpa_printf(MSG_DEBUG, "%s: ie count botch (key mgmt), " "count %u left %u", __func__, count, left); return -1; } for (i = 0; i < count; i++) { data->key_mgmt |= wpa_key_mgmt_to_bitfield(pos); pos += WPA_SELECTOR_LEN; left -= WPA_SELECTOR_LEN; } } else if (left == 1) { wpa_printf(MSG_DEBUG, "%s: ie too short (for capabilities)", __func__); return -1; } if (left >= 2) { data->capabilities = WPA_GET_LE16(pos); pos += 2; left -= 2; } if (left > 0) { wpa_printf(MSG_DEBUG, "%s: ie has %u trailing bytes - ignored", __func__, left); } return 0; } /** * wpa_parse_wpa_ie - Parse WPA/RSN IE * @wpa_ie: Pointer to WPA or RSN IE * @wpa_ie_len: Length of the WPA/RSN IE * @data: Pointer to data area for parsing results * Returns: 0 on success, -1 on failure * * Parse the contents of WPA or RSN IE and write the parsed data into data. */ int wpa_parse_wpa_ie(const u8 *wpa_ie, size_t wpa_ie_len, struct wpa_ie_data *data) { if (wpa_ie_len >= 1 && wpa_ie[0] == WLAN_EID_RSN) return wpa_parse_wpa_ie_rsn(wpa_ie, wpa_ie_len, data); else return wpa_parse_wpa_ie_wpa(wpa_ie, wpa_ie_len, data); } static int wpa_gen_wpa_ie_wpa(u8 *wpa_ie, size_t wpa_ie_len, int pairwise_cipher, int group_cipher, int key_mgmt) { u8 *pos; struct wpa_ie_hdr *hdr; if (wpa_ie_len < sizeof(*hdr) + WPA_SELECTOR_LEN + 2 + WPA_SELECTOR_LEN + 2 + WPA_SELECTOR_LEN) return -1; hdr = (struct wpa_ie_hdr *) wpa_ie; hdr->elem_id = WLAN_EID_VENDOR_SPECIFIC; RSN_SELECTOR_PUT(hdr->oui, WPA_OUI_TYPE); WPA_PUT_LE16(hdr->version, WPA_VERSION); pos = (u8 *) (hdr + 1); if (group_cipher == WPA_CIPHER_CCMP) { RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_CCMP); } else if (group_cipher == WPA_CIPHER_TKIP) { RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_TKIP); } else if (group_cipher == WPA_CIPHER_WEP104) { RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_WEP104); } else if (group_cipher == WPA_CIPHER_WEP40) { RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_WEP40); } else { wpa_printf(MSG_WARNING, "Invalid group cipher (%d).", group_cipher); return -1; } pos += WPA_SELECTOR_LEN; *pos++ = 1; *pos++ = 0; if (pairwise_cipher == WPA_CIPHER_CCMP) { RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_CCMP); } else if (pairwise_cipher == WPA_CIPHER_TKIP) { RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_TKIP); } else if (pairwise_cipher == WPA_CIPHER_NONE) { RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_NONE); } else { wpa_printf(MSG_WARNING, "Invalid pairwise cipher (%d).", pairwise_cipher); return -1; } pos += WPA_SELECTOR_LEN; *pos++ = 1; *pos++ = 0; if (key_mgmt == WPA_KEY_MGMT_IEEE8021X) { RSN_SELECTOR_PUT(pos, WPA_AUTH_KEY_MGMT_UNSPEC_802_1X); } else if (key_mgmt == WPA_KEY_MGMT_PSK) { RSN_SELECTOR_PUT(pos, WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X); } else if (key_mgmt == WPA_KEY_MGMT_WPA_NONE) { RSN_SELECTOR_PUT(pos, WPA_AUTH_KEY_MGMT_NONE); } else { wpa_printf(MSG_WARNING, "Invalid key management type (%d).", key_mgmt); return -1; } pos += WPA_SELECTOR_LEN; /* WPA Capabilities; use defaults, so no need to include it */ hdr->len = (pos - wpa_ie) - 2; WPA_ASSERT((size_t) (pos - wpa_ie) <= wpa_ie_len); return pos - wpa_ie; } static int wpa_gen_wpa_ie_rsn(u8 *rsn_ie, size_t rsn_ie_len, int pairwise_cipher, int group_cipher, int key_mgmt, int mgmt_group_cipher, struct wpa_sm *sm) { #ifndef CONFIG_NO_WPA2 u8 *pos; struct rsn_ie_hdr *hdr; u16 capab; if (rsn_ie_len < sizeof(*hdr) + RSN_SELECTOR_LEN + 2 + RSN_SELECTOR_LEN + 2 + RSN_SELECTOR_LEN + 2 + (sm->cur_pmksa ? 2 + PMKID_LEN : 0)) { wpa_printf(MSG_DEBUG, "RSN: Too short IE buffer (%lu bytes)", (unsigned long) rsn_ie_len); return -1; } hdr = (struct rsn_ie_hdr *) rsn_ie; hdr->elem_id = WLAN_EID_RSN; WPA_PUT_LE16(hdr->version, RSN_VERSION); pos = (u8 *) (hdr + 1); if (group_cipher == WPA_CIPHER_CCMP) { RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_CCMP); } else if (group_cipher == WPA_CIPHER_TKIP) { RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_TKIP); } else if (group_cipher == WPA_CIPHER_WEP104) { RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_WEP104); } else if (group_cipher == WPA_CIPHER_WEP40) { RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_WEP40); } else { wpa_printf(MSG_WARNING, "Invalid group cipher (%d).", group_cipher); return -1; } pos += RSN_SELECTOR_LEN; *pos++ = 1; *pos++ = 0; if (pairwise_cipher == WPA_CIPHER_CCMP) { RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_CCMP); } else if (pairwise_cipher == WPA_CIPHER_TKIP) { RSN_SELECTOR_PUT(pos, RSN_C