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gerrit.omnirom.org / android_external_wpa_supplicant_8 / 19205d48dcbba0ae7a0726db617c3ba9d6c98c7a / . / src / common / dpp.h
blob: dfee49918a75fa34064983a763b04b46b9ed1391 [file] [log] [blame]
Dmitry Shmidtd2986c22017-10-23 14:22:09 -0700[diff] [blame]1/*
2 * DPP functionality shared between hostapd and wpa_supplicant
3 * Copyright (c) 2017, Qualcomm Atheros, Inc.
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9#ifndef DPP_H
10#define DPP_H
11
12#include <openssl/x509.h>
13
14#include "utils/list.h"
15#include "common/wpa_common.h"
16#include "crypto/sha256.h"
17
18#define DPP_HDR_LEN (4 + 2) /* OUI, OUI Type, Crypto Suite, DPP frame type */
19
20enum dpp_public_action_frame_type {
21 DPP_PA_AUTHENTICATION_REQ = 0,
22 DPP_PA_AUTHENTICATION_RESP = 1,
23 DPP_PA_AUTHENTICATION_CONF = 2,
24 DPP_PA_PEER_DISCOVERY_REQ = 5,
25 DPP_PA_PEER_DISCOVERY_RESP = 6,
26 DPP_PA_PKEX_EXCHANGE_REQ = 7,
27 DPP_PA_PKEX_EXCHANGE_RESP = 8,
28 DPP_PA_PKEX_COMMIT_REVEAL_REQ = 9,
29 DPP_PA_PKEX_COMMIT_REVEAL_RESP = 10,
30};
31
32enum dpp_attribute_id {
33 DPP_ATTR_STATUS = 0x1000,
34 DPP_ATTR_I_BOOTSTRAP_KEY_HASH = 0x1001,
35 DPP_ATTR_R_BOOTSTRAP_KEY_HASH = 0x1002,
36 DPP_ATTR_I_PROTOCOL_KEY = 0x1003,
37 DPP_ATTR_WRAPPED_DATA = 0x1004,
38 DPP_ATTR_I_NONCE = 0x1005,
39 DPP_ATTR_I_CAPABILITIES = 0x1006,
40 DPP_ATTR_R_NONCE = 0x1007,
41 DPP_ATTR_R_CAPABILITIES = 0x1008,
42 DPP_ATTR_R_PROTOCOL_KEY = 0x1009,
43 DPP_ATTR_I_AUTH_TAG = 0x100A,
44 DPP_ATTR_R_AUTH_TAG = 0x100B,
45 DPP_ATTR_CONFIG_OBJ = 0x100C,
46 DPP_ATTR_CONNECTOR = 0x100D,
47 DPP_ATTR_CONFIG_ATTR_OBJ = 0x100E,
48 DPP_ATTR_BOOTSTRAP_KEY = 0x100F,
49 DPP_ATTR_OWN_NET_NK_HASH = 0x1011,
50 DPP_ATTR_FINITE_CYCLIC_GROUP = 0x1012,
51 DPP_ATTR_ENCRYPTED_KEY = 0x1013,
52 DPP_ATTR_ENROLLEE_NONCE = 0x1014,
53 DPP_ATTR_CODE_IDENTIFIER = 0x1015,
54 DPP_ATTR_TRANSACTION_ID = 0x1016,
55};
56
57enum dpp_status_error {
58 DPP_STATUS_OK = 0,
59 DPP_STATUS_NOT_COMPATIBLE = 1,
60 DPP_STATUS_AUTH_FAILURE = 2,
61 DPP_STATUS_UNWRAP_FAILURE = 3,
62 DPP_STATUS_BAD_GROUP = 4,
63 DPP_STATUS_CONFIGURE_FAILURE = 5,
64 DPP_STATUS_RESPONSE_PENDING = 6,
65};
66
67#define DPP_CAPAB_ENROLLEE BIT(0)
68#define DPP_CAPAB_CONFIGURATOR BIT(1)
69#define DPP_CAPAB_ROLE_MASK (BIT(0) | BIT(1))
70
71#define DPP_BOOTSTRAP_MAX_FREQ 30
72#define DPP_MAX_NONCE_LEN 32
73#define DPP_MAX_HASH_LEN 64
74#define DPP_MAX_SHARED_SECRET_LEN 66
75
76struct dpp_curve_params {
77 const char *name;
78 size_t hash_len;
79 size_t aes_siv_key_len;
80 size_t nonce_len;
81 size_t prime_len;
82 const char *jwk_crv;
83 u16 ike_group;
84 const char *jws_alg;
85};
86
87enum dpp_bootstrap_type {
88 DPP_BOOTSTRAP_QR_CODE,
89 DPP_BOOTSTRAP_PKEX,
90};
91
92struct dpp_bootstrap_info {
93 struct dl_list list;
94 unsigned int id;
95 enum dpp_bootstrap_type type;
96 char *uri;
97 u8 mac_addr[ETH_ALEN];
98 char *info;
99 unsigned int freq[DPP_BOOTSTRAP_MAX_FREQ];
100 unsigned int num_freq;
101 int own;
102 EVP_PKEY *pubkey;
103 u8 pubkey_hash[SHA256_MAC_LEN];
104 const struct dpp_curve_params *curve;
105};
106
107struct dpp_pkex {
108 unsigned int initiator:1;
109 unsigned int exchange_done:1;
110 struct dpp_bootstrap_info *own_bi;
111 u8 own_mac[ETH_ALEN];
112 u8 peer_mac[ETH_ALEN];
113 char *identifier;
114 char *code;
115 EVP_PKEY *x;
116 EVP_PKEY *y;
117 u8 Mx[DPP_MAX_SHARED_SECRET_LEN];
118 u8 Nx[DPP_MAX_SHARED_SECRET_LEN];
119 u8 z[DPP_MAX_HASH_LEN];
120 EVP_PKEY *peer_bootstrap_key;
121 struct wpabuf *exchange_req;
122 struct wpabuf *exchange_resp;
123};
124
125struct dpp_configuration {
126 u8 ssid[32];
127 size_t ssid_len;
128 int dpp; /* whether to use DPP or legacy configuration */
129
130 /* For DPP configuration (connector) */
131 os_time_t netaccesskey_expiry;
132
133 /* TODO: groups */
134
135 /* For legacy configuration */
136 char *passphrase;
137 u8 psk[32];
138};
139
140struct dpp_authentication {
141 void *msg_ctx;
142 const struct dpp_curve_params *curve;
143 struct dpp_bootstrap_info *peer_bi;
144 struct dpp_bootstrap_info *own_bi;
145 u8 waiting_pubkey_hash[SHA256_MAC_LEN];
146 int response_pending;
147 enum dpp_status_error auth_resp_status;
148 u8 peer_mac_addr[ETH_ALEN];
149 u8 i_nonce[DPP_MAX_NONCE_LEN];
150 u8 r_nonce[DPP_MAX_NONCE_LEN];
151 u8 e_nonce[DPP_MAX_NONCE_LEN];
152 u8 i_capab;
153 u8 r_capab;
154 EVP_PKEY *own_protocol_key;
155 EVP_PKEY *peer_protocol_key;
156 struct wpabuf *req_msg;
157 struct wpabuf *resp_msg;
158 unsigned int curr_freq;
159 size_t secret_len;
160 u8 Mx[DPP_MAX_SHARED_SECRET_LEN];
161 u8 Nx[DPP_MAX_SHARED_SECRET_LEN];
162 u8 Lx[DPP_MAX_SHARED_SECRET_LEN];
163 u8 k1[DPP_MAX_HASH_LEN];
164 u8 k2[DPP_MAX_HASH_LEN];
165 u8 ke[DPP_MAX_HASH_LEN];
166 int initiator;
167 int configurator;
168 int remove_on_tx_status;
169 int auth_success;
170 struct wpabuf *conf_req;
171 struct dpp_configuration *conf_ap;
172 struct dpp_configuration *conf_sta;
173 struct dpp_configurator *conf;
174 char *connector; /* received signedConnector */
175 u8 ssid[SSID_MAX_LEN];
176 u8 ssid_len;
177 char passphrase[64];
178 u8 psk[PMK_LEN];
179 int psk_set;
180 struct wpabuf *net_access_key;
181 os_time_t net_access_key_expiry;
182 struct wpabuf *c_sign_key;
183#ifdef CONFIG_TESTING_OPTIONS
184 char *config_obj_override;
185 char *discovery_override;
186 char *groups_override;
187 unsigned int ignore_netaccesskey_mismatch:1;
188#endif /* CONFIG_TESTING_OPTIONS */
189};
190
191struct dpp_configurator {
192 struct dl_list list;
193 unsigned int id;
194 int own;
195 EVP_PKEY *csign;
196 char *kid;
197 const struct dpp_curve_params *curve;
198};
199
200struct dpp_introduction {
201 u8 pmkid[PMKID_LEN];
202 u8 pmk[PMK_LEN_MAX];
203 size_t pmk_len;
204};
205
206void dpp_bootstrap_info_free(struct dpp_bootstrap_info *info);
207const char * dpp_bootstrap_type_txt(enum dpp_bootstrap_type type);
208int dpp_bootstrap_key_hash(struct dpp_bootstrap_info *bi);
209int dpp_parse_uri_chan_list(struct dpp_bootstrap_info *bi,
210 const char *chan_list);
211int dpp_parse_uri_mac(struct dpp_bootstrap_info *bi, const char *mac);
212int dpp_parse_uri_info(struct dpp_bootstrap_info *bi, const char *info);
213struct dpp_bootstrap_info * dpp_parse_qr_code(const char *uri);
214char * dpp_keygen(struct dpp_bootstrap_info *bi, const char *curve,
215 const u8 *privkey, size_t privkey_len);
216struct dpp_authentication * dpp_auth_init(void *msg_ctx,
217 struct dpp_bootstrap_info *peer_bi,
218 struct dpp_bootstrap_info *own_bi,
219 int configurator);
220struct dpp_authentication *
221dpp_auth_req_rx(void *msg_ctx, u8 dpp_allowed_roles, int qr_mutual,
222 struct dpp_bootstrap_info *peer_bi,
223 struct dpp_bootstrap_info *own_bi,
224 unsigned int freq, const u8 *hdr, const u8 *attr_start,
225 const u8 *wrapped_data, u16 wrapped_data_len);
226struct wpabuf *
227dpp_auth_resp_rx(struct dpp_authentication *auth, const u8 *hdr,
228 const u8 *attr_start, size_t attr_len);
229struct wpabuf * dpp_build_conf_req(struct dpp_authentication *auth,
230 const char *json);
231int dpp_auth_conf_rx(struct dpp_authentication *auth, const u8 *hdr,
232 const u8 *attr_start, size_t attr_len);
233int dpp_notify_new_qr_code(struct dpp_authentication *auth,
234 struct dpp_bootstrap_info *peer_bi);
235void dpp_configuration_free(struct dpp_configuration *conf);
236void dpp_auth_deinit(struct dpp_authentication *auth);
237struct wpabuf *
238dpp_conf_req_rx(struct dpp_authentication *auth, const u8 *attr_start,
239 size_t attr_len);
240int dpp_conf_resp_rx(struct dpp_authentication *auth,
241 const struct wpabuf *resp);
242struct wpabuf * dpp_alloc_msg(enum dpp_public_action_frame_type type,
243 size_t len);
244const u8 * dpp_get_attr(const u8 *buf, size_t len, u16 req_id, u16 *ret_len);
245int dpp_check_attrs(const u8 *buf, size_t len);
246int dpp_key_expired(const char *timestamp, os_time_t *expiry);
247void dpp_configurator_free(struct dpp_configurator *conf);
248struct dpp_configurator *
249dpp_keygen_configurator(const char *curve, const u8 *privkey,
250 size_t privkey_len);
251int dpp_configurator_own_config(struct dpp_authentication *auth,
252 const char *curve);
253int dpp_peer_intro(struct dpp_introduction *intro, const char *own_connector,
254 const u8 *net_access_key, size_t net_access_key_len,
255 const u8 *csign_key, size_t csign_key_len,
256 const u8 *peer_connector, size_t peer_connector_len,
257 os_time_t *expiry);
258struct dpp_pkex * dpp_pkex_init(struct dpp_bootstrap_info *bi,
259 const u8 *own_mac,
260 const char *identifier,
261 const char *code);
262struct dpp_pkex * dpp_pkex_rx_exchange_req(struct dpp_bootstrap_info *bi,
263 const u8 *own_mac,
264 const u8 *peer_mac,
265 const char *identifier,
266 const char *code,
267 const u8 *buf, size_t len);
268struct wpabuf * dpp_pkex_rx_exchange_resp(struct dpp_pkex *pkex,
269 const u8 *buf, size_t len);
270struct wpabuf * dpp_pkex_rx_commit_reveal_req(struct dpp_pkex *pkex,
271 const u8 *hdr,
272 const u8 *buf, size_t len);
273int dpp_pkex_rx_commit_reveal_resp(struct dpp_pkex *pkex, const u8 *hdr,
274 const u8 *buf, size_t len);
275void dpp_pkex_free(struct dpp_pkex *pkex);
276
277#endif /* DPP_H */