60a27d653d
This patch adds a smp_generate_oob function that allows to create local out-of-band data that can be used for pairing and also provides the confirmation and random value. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
210 lines
4.9 KiB
C
210 lines
4.9 KiB
C
/*
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BlueZ - Bluetooth protocol stack for Linux
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Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License version 2 as
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published by the Free Software Foundation;
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
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IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
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CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
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COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
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SOFTWARE IS DISCLAIMED.
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*/
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#ifndef __SMP_H
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#define __SMP_H
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struct smp_command_hdr {
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__u8 code;
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} __packed;
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#define SMP_CMD_PAIRING_REQ 0x01
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#define SMP_CMD_PAIRING_RSP 0x02
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struct smp_cmd_pairing {
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__u8 io_capability;
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__u8 oob_flag;
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__u8 auth_req;
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__u8 max_key_size;
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__u8 init_key_dist;
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__u8 resp_key_dist;
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} __packed;
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#define SMP_IO_DISPLAY_ONLY 0x00
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#define SMP_IO_DISPLAY_YESNO 0x01
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#define SMP_IO_KEYBOARD_ONLY 0x02
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#define SMP_IO_NO_INPUT_OUTPUT 0x03
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#define SMP_IO_KEYBOARD_DISPLAY 0x04
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#define SMP_OOB_NOT_PRESENT 0x00
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#define SMP_OOB_PRESENT 0x01
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#define SMP_DIST_ENC_KEY 0x01
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#define SMP_DIST_ID_KEY 0x02
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#define SMP_DIST_SIGN 0x04
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#define SMP_DIST_LINK_KEY 0x08
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#define SMP_AUTH_NONE 0x00
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#define SMP_AUTH_BONDING 0x01
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#define SMP_AUTH_MITM 0x04
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#define SMP_AUTH_SC 0x08
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#define SMP_AUTH_KEYPRESS 0x10
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#define SMP_CMD_PAIRING_CONFIRM 0x03
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struct smp_cmd_pairing_confirm {
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__u8 confirm_val[16];
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} __packed;
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#define SMP_CMD_PAIRING_RANDOM 0x04
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struct smp_cmd_pairing_random {
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__u8 rand_val[16];
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} __packed;
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#define SMP_CMD_PAIRING_FAIL 0x05
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struct smp_cmd_pairing_fail {
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__u8 reason;
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} __packed;
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#define SMP_CMD_ENCRYPT_INFO 0x06
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struct smp_cmd_encrypt_info {
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__u8 ltk[16];
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} __packed;
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#define SMP_CMD_MASTER_IDENT 0x07
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struct smp_cmd_master_ident {
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__le16 ediv;
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__le64 rand;
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} __packed;
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#define SMP_CMD_IDENT_INFO 0x08
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struct smp_cmd_ident_info {
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__u8 irk[16];
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} __packed;
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#define SMP_CMD_IDENT_ADDR_INFO 0x09
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struct smp_cmd_ident_addr_info {
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__u8 addr_type;
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bdaddr_t bdaddr;
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} __packed;
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#define SMP_CMD_SIGN_INFO 0x0a
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struct smp_cmd_sign_info {
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__u8 csrk[16];
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} __packed;
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#define SMP_CMD_SECURITY_REQ 0x0b
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struct smp_cmd_security_req {
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__u8 auth_req;
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} __packed;
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#define SMP_CMD_PUBLIC_KEY 0x0c
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struct smp_cmd_public_key {
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__u8 x[32];
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__u8 y[32];
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} __packed;
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#define SMP_CMD_DHKEY_CHECK 0x0d
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struct smp_cmd_dhkey_check {
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__u8 e[16];
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} __packed;
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#define SMP_CMD_KEYPRESS_NOTIFY 0x0e
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struct smp_cmd_keypress_notify {
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__u8 value;
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} __packed;
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#define SMP_CMD_MAX 0x0e
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#define SMP_PASSKEY_ENTRY_FAILED 0x01
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#define SMP_OOB_NOT_AVAIL 0x02
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#define SMP_AUTH_REQUIREMENTS 0x03
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#define SMP_CONFIRM_FAILED 0x04
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#define SMP_PAIRING_NOTSUPP 0x05
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#define SMP_ENC_KEY_SIZE 0x06
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#define SMP_CMD_NOTSUPP 0x07
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#define SMP_UNSPECIFIED 0x08
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#define SMP_REPEATED_ATTEMPTS 0x09
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#define SMP_INVALID_PARAMS 0x0a
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#define SMP_DHKEY_CHECK_FAILED 0x0b
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#define SMP_NUMERIC_COMP_FAILED 0x0c
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#define SMP_BREDR_PAIRING_IN_PROGRESS 0x0d
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#define SMP_CROSS_TRANSP_NOT_ALLOWED 0x0e
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#define SMP_MIN_ENC_KEY_SIZE 7
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#define SMP_MAX_ENC_KEY_SIZE 16
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/* LTK types used in internal storage (struct smp_ltk) */
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enum {
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SMP_STK,
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SMP_LTK,
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SMP_LTK_SLAVE,
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SMP_LTK_P256,
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SMP_LTK_P256_DEBUG,
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};
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static inline bool smp_ltk_is_sc(struct smp_ltk *key)
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{
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switch (key->type) {
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case SMP_LTK_P256:
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case SMP_LTK_P256_DEBUG:
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return true;
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}
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return false;
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}
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static inline u8 smp_ltk_sec_level(struct smp_ltk *key)
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{
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if (key->authenticated) {
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if (smp_ltk_is_sc(key))
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return BT_SECURITY_FIPS;
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else
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return BT_SECURITY_HIGH;
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}
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return BT_SECURITY_MEDIUM;
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}
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/* Key preferences for smp_sufficient security */
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enum smp_key_pref {
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SMP_ALLOW_STK,
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SMP_USE_LTK,
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};
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/* SMP Commands */
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bool smp_sufficient_security(struct hci_conn *hcon, u8 sec_level,
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enum smp_key_pref key_pref);
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int smp_conn_security(struct hci_conn *hcon, __u8 sec_level);
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int smp_user_confirm_reply(struct hci_conn *conn, u16 mgmt_op, __le32 passkey);
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bool smp_irk_matches(struct hci_dev *hdev, const u8 irk[16],
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const bdaddr_t *bdaddr);
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int smp_generate_rpa(struct hci_dev *hdev, const u8 irk[16], bdaddr_t *rpa);
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int smp_generate_oob(struct hci_dev *hdev, u8 hash[16], u8 rand[16]);
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int smp_register(struct hci_dev *hdev);
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void smp_unregister(struct hci_dev *hdev);
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#if IS_ENABLED(CONFIG_BT_SELFTEST_SMP)
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int bt_selftest_smp(void);
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#else
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static inline int bt_selftest_smp(void)
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{
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return 0;
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}
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#endif
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#endif /* __SMP_H */
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