1 /* 2 BlueZ - Bluetooth protocol stack for Linux 3 Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). 4 5 This program is free software; you can redistribute it and/or modify 6 it under the terms of the GNU General Public License version 2 as 7 published by the Free Software Foundation; 8 9 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 10 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 11 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. 12 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY 13 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES 14 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 18 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, 19 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS 20 SOFTWARE IS DISCLAIMED. 21 */ 22 23 #ifndef __SMP_H 24 #define __SMP_H 25 26 struct smp_command_hdr { 27 __u8 code; 28 } __packed; 29 30 #define SMP_CMD_PAIRING_REQ 0x01 31 #define SMP_CMD_PAIRING_RSP 0x02 32 struct smp_cmd_pairing { 33 __u8 io_capability; 34 __u8 oob_flag; 35 __u8 auth_req; 36 __u8 max_key_size; 37 __u8 init_key_dist; 38 __u8 resp_key_dist; 39 } __packed; 40 41 #define SMP_IO_DISPLAY_ONLY 0x00 42 #define SMP_IO_DISPLAY_YESNO 0x01 43 #define SMP_IO_KEYBOARD_ONLY 0x02 44 #define SMP_IO_NO_INPUT_OUTPUT 0x03 45 #define SMP_IO_KEYBOARD_DISPLAY 0x04 46 47 #define SMP_OOB_NOT_PRESENT 0x00 48 #define SMP_OOB_PRESENT 0x01 49 50 #define SMP_DIST_ENC_KEY 0x01 51 #define SMP_DIST_ID_KEY 0x02 52 #define SMP_DIST_SIGN 0x04 53 #define SMP_DIST_LINK_KEY 0x08 54 55 #define SMP_AUTH_NONE 0x00 56 #define SMP_AUTH_BONDING 0x01 57 #define SMP_AUTH_MITM 0x04 58 #define SMP_AUTH_SC 0x08 59 #define SMP_AUTH_KEYPRESS 0x10 60 #define SMP_AUTH_CT2 0x20 61 62 #define SMP_CMD_PAIRING_CONFIRM 0x03 63 struct smp_cmd_pairing_confirm { 64 __u8 confirm_val[16]; 65 } __packed; 66 67 #define SMP_CMD_PAIRING_RANDOM 0x04 68 struct smp_cmd_pairing_random { 69 __u8 rand_val[16]; 70 } __packed; 71 72 #define SMP_CMD_PAIRING_FAIL 0x05 73 struct smp_cmd_pairing_fail { 74 __u8 reason; 75 } __packed; 76 77 #define SMP_CMD_ENCRYPT_INFO 0x06 78 struct smp_cmd_encrypt_info { 79 __u8 ltk[16]; 80 } __packed; 81 82 #define SMP_CMD_MASTER_IDENT 0x07 83 struct smp_cmd_master_ident { 84 __le16 ediv; 85 __le64 rand; 86 } __packed; 87 88 #define SMP_CMD_IDENT_INFO 0x08 89 struct smp_cmd_ident_info { 90 __u8 irk[16]; 91 } __packed; 92 93 #define SMP_CMD_IDENT_ADDR_INFO 0x09 94 struct smp_cmd_ident_addr_info { 95 __u8 addr_type; 96 bdaddr_t bdaddr; 97 } __packed; 98 99 #define SMP_CMD_SIGN_INFO 0x0a 100 struct smp_cmd_sign_info { 101 __u8 csrk[16]; 102 } __packed; 103 104 #define SMP_CMD_SECURITY_REQ 0x0b 105 struct smp_cmd_security_req { 106 __u8 auth_req; 107 } __packed; 108 109 #define SMP_CMD_PUBLIC_KEY 0x0c 110 struct smp_cmd_public_key { 111 __u8 x[32]; 112 __u8 y[32]; 113 } __packed; 114 115 #define SMP_CMD_DHKEY_CHECK 0x0d 116 struct smp_cmd_dhkey_check { 117 __u8 e[16]; 118 } __packed; 119 120 #define SMP_CMD_KEYPRESS_NOTIFY 0x0e 121 struct smp_cmd_keypress_notify { 122 __u8 value; 123 } __packed; 124 125 #define SMP_CMD_MAX 0x0e 126 127 #define SMP_PASSKEY_ENTRY_FAILED 0x01 128 #define SMP_OOB_NOT_AVAIL 0x02 129 #define SMP_AUTH_REQUIREMENTS 0x03 130 #define SMP_CONFIRM_FAILED 0x04 131 #define SMP_PAIRING_NOTSUPP 0x05 132 #define SMP_ENC_KEY_SIZE 0x06 133 #define SMP_CMD_NOTSUPP 0x07 134 #define SMP_UNSPECIFIED 0x08 135 #define SMP_REPEATED_ATTEMPTS 0x09 136 #define SMP_INVALID_PARAMS 0x0a 137 #define SMP_DHKEY_CHECK_FAILED 0x0b 138 #define SMP_NUMERIC_COMP_FAILED 0x0c 139 #define SMP_BREDR_PAIRING_IN_PROGRESS 0x0d 140 #define SMP_CROSS_TRANSP_NOT_ALLOWED 0x0e 141 142 #define SMP_MIN_ENC_KEY_SIZE 7 143 #define SMP_MAX_ENC_KEY_SIZE 16 144 145 /* LTK types used in internal storage (struct smp_ltk) */ 146 enum { 147 SMP_STK, 148 SMP_LTK, 149 SMP_LTK_SLAVE, 150 SMP_LTK_P256, 151 SMP_LTK_P256_DEBUG, 152 }; 153 154 static inline bool smp_ltk_is_sc(struct smp_ltk *key) 155 { 156 switch (key->type) { 157 case SMP_LTK_P256: 158 case SMP_LTK_P256_DEBUG: 159 return true; 160 } 161 162 return false; 163 } 164 165 static inline u8 smp_ltk_sec_level(struct smp_ltk *key) 166 { 167 if (key->authenticated) { 168 if (smp_ltk_is_sc(key)) 169 return BT_SECURITY_FIPS; 170 else 171 return BT_SECURITY_HIGH; 172 } 173 174 return BT_SECURITY_MEDIUM; 175 } 176 177 /* Key preferences for smp_sufficient security */ 178 enum smp_key_pref { 179 SMP_ALLOW_STK, 180 SMP_USE_LTK, 181 }; 182 183 /* SMP Commands */ 184 void smp_cancel_pairing(struct hci_conn *hcon); 185 bool smp_sufficient_security(struct hci_conn *hcon, u8 sec_level, 186 enum smp_key_pref key_pref); 187 int smp_conn_security(struct hci_conn *hcon, __u8 sec_level); 188 int smp_user_confirm_reply(struct hci_conn *conn, u16 mgmt_op, __le32 passkey); 189 190 bool smp_irk_matches(struct hci_dev *hdev, const u8 irk[16], 191 const bdaddr_t *bdaddr); 192 int smp_generate_rpa(struct hci_dev *hdev, const u8 irk[16], bdaddr_t *rpa); 193 int smp_generate_oob(struct hci_dev *hdev, u8 hash[16], u8 rand[16]); 194 195 int smp_register(struct hci_dev *hdev); 196 void smp_unregister(struct hci_dev *hdev); 197 198 #if IS_ENABLED(CONFIG_BT_SELFTEST_SMP) 199 200 int bt_selftest_smp(void); 201 202 #else 203 204 static inline int bt_selftest_smp(void) 205 { 206 return 0; 207 } 208 209 #endif 210 211 #endif /* __SMP_H */ 212