1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 BlueZ - Bluetooth protocol stack for Linux 4 Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). 5 6 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 7 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 8 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. 9 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY 10 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES 11 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 12 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 13 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 14 15 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, 16 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS 17 SOFTWARE IS DISCLAIMED. 18 */ 19 20 #ifndef __SMP_H 21 #define __SMP_H 22 23 struct smp_command_hdr { 24 __u8 code; 25 } __packed; 26 27 #define SMP_CMD_PAIRING_REQ 0x01 28 #define SMP_CMD_PAIRING_RSP 0x02 29 struct smp_cmd_pairing { 30 __u8 io_capability; 31 __u8 oob_flag; 32 __u8 auth_req; 33 __u8 max_key_size; 34 __u8 init_key_dist; 35 __u8 resp_key_dist; 36 } __packed; 37 38 #define SMP_IO_DISPLAY_ONLY 0x00 39 #define SMP_IO_DISPLAY_YESNO 0x01 40 #define SMP_IO_KEYBOARD_ONLY 0x02 41 #define SMP_IO_NO_INPUT_OUTPUT 0x03 42 #define SMP_IO_KEYBOARD_DISPLAY 0x04 43 44 #define SMP_OOB_NOT_PRESENT 0x00 45 #define SMP_OOB_PRESENT 0x01 46 47 #define SMP_DIST_ENC_KEY 0x01 48 #define SMP_DIST_ID_KEY 0x02 49 #define SMP_DIST_SIGN 0x04 50 #define SMP_DIST_LINK_KEY 0x08 51 52 #define SMP_AUTH_NONE 0x00 53 #define SMP_AUTH_BONDING 0x01 54 #define SMP_AUTH_MITM 0x04 55 #define SMP_AUTH_SC 0x08 56 #define SMP_AUTH_KEYPRESS 0x10 57 #define SMP_AUTH_CT2 0x20 58 59 #define SMP_CMD_PAIRING_CONFIRM 0x03 60 struct smp_cmd_pairing_confirm { 61 __u8 confirm_val[16]; 62 } __packed; 63 64 #define SMP_CMD_PAIRING_RANDOM 0x04 65 struct smp_cmd_pairing_random { 66 __u8 rand_val[16]; 67 } __packed; 68 69 #define SMP_CMD_PAIRING_FAIL 0x05 70 struct smp_cmd_pairing_fail { 71 __u8 reason; 72 } __packed; 73 74 #define SMP_CMD_ENCRYPT_INFO 0x06 75 struct smp_cmd_encrypt_info { 76 __u8 ltk[16]; 77 } __packed; 78 79 #define SMP_CMD_INITIATOR_IDENT 0x07 80 struct smp_cmd_initiator_ident { 81 __le16 ediv; 82 __le64 rand; 83 } __packed; 84 85 #define SMP_CMD_IDENT_INFO 0x08 86 struct smp_cmd_ident_info { 87 __u8 irk[16]; 88 } __packed; 89 90 #define SMP_CMD_IDENT_ADDR_INFO 0x09 91 struct smp_cmd_ident_addr_info { 92 __u8 addr_type; 93 bdaddr_t bdaddr; 94 } __packed; 95 96 #define SMP_CMD_SIGN_INFO 0x0a 97 struct smp_cmd_sign_info { 98 __u8 csrk[16]; 99 } __packed; 100 101 #define SMP_CMD_SECURITY_REQ 0x0b 102 struct smp_cmd_security_req { 103 __u8 auth_req; 104 } __packed; 105 106 #define SMP_CMD_PUBLIC_KEY 0x0c 107 struct smp_cmd_public_key { 108 __u8 x[32]; 109 __u8 y[32]; 110 } __packed; 111 112 #define SMP_CMD_DHKEY_CHECK 0x0d 113 struct smp_cmd_dhkey_check { 114 __u8 e[16]; 115 } __packed; 116 117 #define SMP_CMD_KEYPRESS_NOTIFY 0x0e 118 struct smp_cmd_keypress_notify { 119 __u8 value; 120 } __packed; 121 122 #define SMP_CMD_MAX 0x0e 123 124 #define SMP_PASSKEY_ENTRY_FAILED 0x01 125 #define SMP_OOB_NOT_AVAIL 0x02 126 #define SMP_AUTH_REQUIREMENTS 0x03 127 #define SMP_CONFIRM_FAILED 0x04 128 #define SMP_PAIRING_NOTSUPP 0x05 129 #define SMP_ENC_KEY_SIZE 0x06 130 #define SMP_CMD_NOTSUPP 0x07 131 #define SMP_UNSPECIFIED 0x08 132 #define SMP_REPEATED_ATTEMPTS 0x09 133 #define SMP_INVALID_PARAMS 0x0a 134 #define SMP_DHKEY_CHECK_FAILED 0x0b 135 #define SMP_NUMERIC_COMP_FAILED 0x0c 136 #define SMP_BREDR_PAIRING_IN_PROGRESS 0x0d 137 #define SMP_CROSS_TRANSP_NOT_ALLOWED 0x0e 138 #define SMP_KEY_REJECTED 0x0f 139 140 #define SMP_MIN_ENC_KEY_SIZE 7 141 #define SMP_MAX_ENC_KEY_SIZE 16 142 143 /* LTK types used in internal storage (struct smp_ltk) */ 144 enum { 145 SMP_STK, 146 SMP_LTK, 147 SMP_LTK_RESPONDER, 148 SMP_LTK_P256, 149 SMP_LTK_P256_DEBUG, 150 }; 151 152 static inline bool smp_ltk_is_sc(struct smp_ltk *key) 153 { 154 switch (key->type) { 155 case SMP_LTK_P256: 156 case SMP_LTK_P256_DEBUG: 157 return true; 158 } 159 160 return false; 161 } 162 163 static inline u8 smp_ltk_sec_level(struct smp_ltk *key) 164 { 165 if (key->authenticated) { 166 if (smp_ltk_is_sc(key)) 167 return BT_SECURITY_FIPS; 168 else 169 return BT_SECURITY_HIGH; 170 } 171 172 return BT_SECURITY_MEDIUM; 173 } 174 175 /* Key preferences for smp_sufficient security */ 176 enum smp_key_pref { 177 SMP_ALLOW_STK, 178 SMP_USE_LTK, 179 }; 180 181 /* SMP Commands */ 182 int smp_cancel_and_remove_pairing(struct hci_dev *hdev, bdaddr_t *bdaddr, 183 u8 addr_type); 184 bool smp_sufficient_security(struct hci_conn *hcon, u8 sec_level, 185 enum smp_key_pref key_pref); 186 int smp_conn_security(struct hci_conn *hcon, __u8 sec_level); 187 int smp_user_confirm_reply(struct hci_conn *conn, u16 mgmt_op, __le32 passkey); 188 189 bool smp_irk_matches(struct hci_dev *hdev, const u8 irk[16], 190 const bdaddr_t *bdaddr); 191 int smp_generate_rpa(struct hci_dev *hdev, const u8 irk[16], bdaddr_t *rpa); 192 int smp_generate_oob(struct hci_dev *hdev, u8 hash[16], u8 rand[16]); 193 194 int smp_force_bredr(struct hci_dev *hdev, bool enable); 195 196 int smp_register(struct hci_dev *hdev); 197 void smp_unregister(struct hci_dev *hdev); 198 199 #if IS_ENABLED(CONFIG_BT_SELFTEST_SMP) 200 201 int bt_selftest_smp(void); 202 203 #else 204 205 static inline int bt_selftest_smp(void) 206 { 207 return 0; 208 } 209 210 #endif 211 212 #endif /* __SMP_H */ 213