sm.c (0a1a2d88e7802e157f2233466f98e9131aef9b2f) sm.c (7ece0eaa04a64d54ee270d7d31e39198d41ab411)
1/*
2 * Copyright (C) 2014 BlueKitchen GmbH
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright

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55#include "hci.h"
56#include "hci_dump.h"
57#include "l2cap.h"
58
59#if !defined(ENABLE_LE_PERIPHERAL) && !defined(ENABLE_LE_CENTRAL)
60#error "LE Security Manager used, but neither ENABLE_LE_PERIPHERAL nor ENABLE_LE_CENTRAL defined. Please add at least one to btstack_config.h."
61#endif
62
1/*
2 * Copyright (C) 2014 BlueKitchen GmbH
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright

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55#include "hci.h"
56#include "hci_dump.h"
57#include "l2cap.h"
58
59#if !defined(ENABLE_LE_PERIPHERAL) && !defined(ENABLE_LE_CENTRAL)
60#error "LE Security Manager used, but neither ENABLE_LE_PERIPHERAL nor ENABLE_LE_CENTRAL defined. Please add at least one to btstack_config.h."
61#endif
62
63#if defined(ENABLE_CROSS_TRANSPORT_KEY_DERIVATION) && !defined(ENABLE_CLASSIC)
64#error "Cross Transport Key Derivation requires BR/EDR (Classic) support"
63#if defined(ENABLE_CROSS_TRANSPORT_KEY_DERIVATION) && (!defined(ENABLE_CLASSIC) || !defined(ENABLE_LE_SECURE_CONNECTIONS))
64#error "Cross Transport Key Derivation requires support for LE Secure Connections and BR/EDR (Classic)"
65#endif
66
67// assert SM Public Key can be sent/received
68#ifdef ENABLE_LE_SECURE_CONNECTIONS
69#if HCI_ACL_PAYLOAD_SIZE < 69
70#error "HCI_ACL_PAYLOAD_SIZE must be at least 69 bytes when using LE Secure Conection. Please increase HCI_ACL_PAYLOAD_SIZE or disable ENABLE_LE_SECURE_CONNECTIONS"
71#endif
72#endif

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1047
1048 int flags = SM_KEYDIST_ID_KEY;
1049 if (sm_auth_req & SM_AUTHREQ_BONDING){
1050 // encryption and signing information only if bonding requested
1051 flags |= SM_KEYDIST_ENC_KEY;
1052#ifdef ENABLE_LE_SIGNED_WRITE
1053 flags |= SM_KEYDIST_SIGN;
1054#endif
65#endif
66
67// assert SM Public Key can be sent/received
68#ifdef ENABLE_LE_SECURE_CONNECTIONS
69#if HCI_ACL_PAYLOAD_SIZE < 69
70#error "HCI_ACL_PAYLOAD_SIZE must be at least 69 bytes when using LE Secure Conection. Please increase HCI_ACL_PAYLOAD_SIZE or disable ENABLE_LE_SECURE_CONNECTIONS"
71#endif
72#endif

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1047
1048 int flags = SM_KEYDIST_ID_KEY;
1049 if (sm_auth_req & SM_AUTHREQ_BONDING){
1050 // encryption and signing information only if bonding requested
1051 flags |= SM_KEYDIST_ENC_KEY;
1052#ifdef ENABLE_LE_SIGNED_WRITE
1053 flags |= SM_KEYDIST_SIGN;
1054#endif
1055#ifdef ENABLE_CROSS_TRANSPORT_KEY_DERIVATION
1056 // LinkKey for CTKD requires SC
1057 if (sm_auth_req & SM_AUTHREQ_SECURE_CONNECTION){
1058 flags |= SM_KEYDIST_LINK_KEY;
1059 }
1060#endif
1055 }
1056 return flags;
1057}
1058
1059static void sm_reset_setup(void){
1060 // fill in sm setup
1061 setup->sm_state_vars = 0;
1062 setup->sm_keypress_notification = 0;

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1062 return flags;
1063}
1064
1065static void sm_reset_setup(void){
1066 // fill in sm setup
1067 setup->sm_state_vars = 0;
1068 setup->sm_keypress_notification = 0;

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