hci.c (573897a04e80b358f96f61316c257740d709d797) hci.c (170fafaee9eb5b65263bedc18252ad8ce06ca49f)
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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2012 uint8_t status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE];
2013 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1);
2014 conn = hci_connection_for_handle(handle);
2015 if (!conn) break;
2016 if (status == 0){
2017 uint8_t key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3];
2018 log_info("Handle %x04x key Size: %u", handle, key_size);
2019 conn->encryption_key_size = key_size;
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

--- 2003 unchanged lines hidden (view full) ---

2012 uint8_t status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE];
2013 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1);
2014 conn = hci_connection_for_handle(handle);
2015 if (!conn) break;
2016 if (status == 0){
2017 uint8_t key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3];
2018 log_info("Handle %x04x key Size: %u", handle, key_size);
2019 conn->encryption_key_size = key_size;
2020 } else {
2021 log_info("Read Encryption Key Size failed -> assuming insecure connection with key size of 1");
2022 conn->encryption_key_size = 1;
2020 }
2021 conn->authentication_flags |= CONNECTION_ENCRYPTED;
2022 hci_emit_security_level(handle, gap_security_level_for_connection(conn));
2023 }
2024#endif
2025 break;
2026
2027 case HCI_EVENT_COMMAND_STATUS:

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2792 hci_stack->bondable = 1;
2793
2794#ifdef ENABLE_CLASSIC
2795 // classic name
2796 hci_stack->local_name = default_classic_name;
2797
2798 // Master slave policy
2799 hci_stack->master_slave_policy = 1;
2023 }
2024 conn->authentication_flags |= CONNECTION_ENCRYPTED;
2025 hci_emit_security_level(handle, gap_security_level_for_connection(conn));
2026 }
2027#endif
2028 break;
2029
2030 case HCI_EVENT_COMMAND_STATUS:

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2795 hci_stack->bondable = 1;
2796
2797#ifdef ENABLE_CLASSIC
2798 // classic name
2799 hci_stack->local_name = default_classic_name;
2800
2801 // Master slave policy
2802 hci_stack->master_slave_policy = 1;
2803
2804 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3, we use 16 as default
2805 hci_stack->gap_required_encyrption_key_size = 16;
2800#endif
2801
2802 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept
2803 hci_stack->ssp_enable = 1;
2804 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT;
2805 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING;
2806 hci_stack->ssp_auto_accept = 1;
2807

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2880
2881#ifdef HAVE_MALLOC
2882 free(hci_stack);
2883#endif
2884 hci_stack = NULL;
2885}
2886
2887#ifdef ENABLE_CLASSIC
2806#endif
2807
2808 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept
2809 hci_stack->ssp_enable = 1;
2810 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT;
2811 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING;
2812 hci_stack->ssp_auto_accept = 1;
2813

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2886
2887#ifdef HAVE_MALLOC
2888 free(hci_stack);
2889#endif
2890 hci_stack = NULL;
2891}
2892
2893#ifdef ENABLE_CLASSIC
2894void gap_set_required_encryption_key_size(uint8_t encryption_key_size){
2895 // validate ranage and set
2896 if (encryption_key_size < 7) return;
2897 if (encryption_key_size > 16) return;
2898 hci_stack->gap_required_encyrption_key_size = encryption_key_size;
2899}
2900#endif
2901
2902#ifdef ENABLE_CLASSIC
2888void gap_set_class_of_device(uint32_t class_of_device){
2889 hci_stack->class_of_device = class_of_device;
2890}
2891
2892void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){
2893 hci_stack->default_link_policy_settings = default_link_policy_settings;
2894}
2895

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4270 pos += 2;
4271 event[pos++] = level;
4272 hci_emit_event(event, sizeof(event), 1);
4273}
4274
4275static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){
4276 if (!connection) return LEVEL_0;
4277 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0;
2903void gap_set_class_of_device(uint32_t class_of_device){
2904 hci_stack->class_of_device = class_of_device;
2905}
2906
2907void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){
2908 hci_stack->default_link_policy_settings = default_link_policy_settings;
2909}
2910

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4285 pos += 2;
4286 event[pos++] = level;
4287 hci_emit_event(event, sizeof(event), 1);
4288}
4289
4290static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){
4291 if (!connection) return LEVEL_0;
4292 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0;
4278 return gap_security_level_for_link_key_type(connection->link_key_type);
4293 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0;
4294 gap_security_level_t level_for_key_type = gap_security_level_for_link_key_type(connection->link_key_type);
4295 // LEVEL 4 always requires 128 bit encrytion key size
4296 if (security_level == LEVEL_4 && connection->encryption_key_size < 16){
4297 security_level = LEVEL_3;
4298 }
4299 return security_level;
4279}
4280
4281static void hci_emit_discoverable_enabled(uint8_t enabled){
4282 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled);
4283 uint8_t event[3];
4284 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED;
4285 event[1] = sizeof(event) - 2;
4286 event[2] = enabled;

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4301
4302static void hci_emit_discoverable_enabled(uint8_t enabled){
4303 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled);
4304 uint8_t event[3];
4305 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED;
4306 event[1] = sizeof(event) - 2;
4307 event[2] = enabled;

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