├── .gitignore ├── LICENSE ├── README.md ├── TemporaryExposureKeyExportV1_1_pb2.py ├── TemporaryExposureKeyExportV1_5_pb2.py ├── count_keys.py ├── create_demo_key_set.py ├── derive_aem_key.py ├── derive_rpi_key.py ├── doc └── algorithm.md ├── lib ├── __init__.py ├── contact_records_pb2.py ├── conversions.py ├── count_users.py ├── count_users_v1_5.py ├── crypto.py ├── diagnosis_key.py ├── diagnosis_keys.py ├── diagnosis_keys_write.py ├── ramble_rpis.py ├── rpis_in_db.py └── scanned_rpis.py ├── parse_keys.py ├── parse_keys_json.py └── requirements.txt /.gitignore: -------------------------------------------------------------------------------- 1 | .idea 2 | venv/* 3 | __pycache__ 4 | TemporaryExposureKeyExport*.proto 5 | testExport*.zip 6 | *.zip 7 | *.csv 8 | app_contact-tracing-* 9 | *.tar.gz 10 | *.ods* 11 | *.bin 12 | *.sig 13 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU AFFERO GENERAL PUBLIC LICENSE 2 | Version 3, 19 November 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU Affero General Public License is a free, copyleft license for 11 | software and other kinds of works, specifically designed to ensure 12 | cooperation with the community in the case of network server software. 13 | 14 | The licenses for most software and other practical works are designed 15 | to take away your freedom to share and change the works. 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Interpretation of Sections 15 and 16. 611 | 612 | If the disclaimer of warranty and limitation of liability provided 613 | above cannot be given local legal effect according to their terms, 614 | reviewing courts shall apply local law that most closely approximates 615 | an absolute waiver of all civil liability in connection with the 616 | Program, unless a warranty or assumption of liability accompanies a 617 | copy of the Program in return for a fee. 618 | 619 | END OF TERMS AND CONDITIONS 620 | 621 | How to Apply These Terms to Your New Programs 622 | 623 | If you develop a new program, and you want it to be of the greatest 624 | possible use to the public, the best way to achieve this is to make it 625 | free software which everyone can redistribute and change under these terms. 626 | 627 | To do so, attach the following notices to the program. It is safest 628 | to attach them to the start of each source file to most effectively 629 | state the exclusion of warranty; and each file should have at least 630 | the "copyright" line and a pointer to where the full notice is found. 631 | 632 | 633 | Copyright (C) 634 | 635 | This program is free software: you can redistribute it and/or modify 636 | it under the terms of the GNU Affero General Public License as published 637 | by the Free Software Foundation, either version 3 of the License, or 638 | (at your option) any later version. 639 | 640 | This program is distributed in the hope that it will be useful, 641 | but WITHOUT ANY WARRANTY; without even the implied warranty of 642 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 643 | GNU Affero General Public License for more details. 644 | 645 | You should have received a copy of the GNU Affero General Public License 646 | along with this program. If not, see . 647 | 648 | Also add information on how to contact you by electronic and paper mail. 649 | 650 | If your software can interact with users remotely through a computer 651 | network, you should also make sure that it provides a way for users to 652 | get its source. For example, if your program is a web application, its 653 | interface could display a "Source" link that leads users to an archive 654 | of the code. There are many ways you could offer source, and different 655 | solutions will be better for different programs; see section 13 for the 656 | specific requirements. 657 | 658 | You should also get your employer (if you work as a programmer) or school, 659 | if any, to sign a "copyright disclaimer" for the program, if necessary. 660 | For more information on this, and how to apply and follow the GNU AGPL, see 661 | . 662 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # diagnosis-keys 2 | Tools for working with Diagnosis Keys from the COVID-19 Exposure Notification / Corona-Warn-App system 3 | 4 | Copyright (C) 2020 Michael Huebler and other contributors 5 | 6 | This program is free software: you can redistribute it and/or modify 7 | it under the terms of the GNU Affero General Public License as published 8 | by the Free Software Foundation, either version 3 of the License, or 9 | (at your option) any later version. 10 | 11 | This program is distributed in the hope that it will be useful, 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 | GNU Affero General Public License for more details. 15 | 16 | You should have received a copy of the GNU Affero General Public License 17 | along with this program. If not, see . 18 | 19 | ## Installation 20 | % git clone https://github.com/mh-/diagnosis-keys 21 | % cd diagnosis-keys 22 | % pip3 install -r requirements.txt 23 | 24 | ## Use 25 | ``` 26 | % ./parse_keys.py -d testExport-2-records-1-of-1.zip 27 | Exposure Notification Diagnosis Key Parser 28 | This script parses published Diagnosis Keys. 29 | 30 | File 'testExport-2-records-1-of-1.zip' read. 31 | - Time window: 2020-05-22 15:00:00 UTC - 2020-05-23 15:00:00 UTC 32 | - Region: US 33 | - Batch: 1 of 1 34 | - Signature Info: 35 | verification_key_version: "1" 36 | verification_key_id: "some_id" 37 | signature_algorithm: "1.2.840.10045.4.3.2" 38 | 39 | Diagnosis Keys: 40 | 1: TEK: 172fc480e598490c34177604339b1543, Transmission Risk Level: 8, Validity: 2020-05-20 15:20:00 UTC - 2020-05-20 15:30:00 UTC (2649980, 1) 41 | 2: TEK: 2b63053ac483238de176169e861f3dcd, Transmission Risk Level: 1, Validity: 2020-05-19 20:20:00 UTC - 2020-05-20 15:20:00 UTC (2649866, 114) 42 | ``` 43 | 44 | You can download an example Diagnosis Keys file here: 45 | https://github.com/google/exposure-notifications-server/blob/master/examples/export/testExport-2-records-1-of-1.zip 46 | (This file was generated from https://github.com/google/exposure-notifications-server/blob/master/examples/export/keys.json, 47 | using Google's [export-generate](https://github.com/google/exposure-notifications-server/tree/master/examples/export) tool.) 48 | 49 | Another example run: 50 | ``` 51 | % ./parse_keys.py -c app_contact-tracing-contact-record-db/ -d tekExport.zip -l -s 52 | Exposure Notification Diagnosis Key Parser 53 | This script parses published Diagnosis Keys. 54 | 55 | File 'tekExport.zip' read. 56 | - Time window: 2020-06-12 13:25:31 CEST - 2020-06-13 13:25:31 CEST 57 | - Region: US 58 | - Batch: 1 of 1 59 | - Signature Info: 60 | verification_key_version: "1" 61 | verification_key_id: "some_id" 62 | signature_algorithm: "1.2.840.10045.4.3.2" 63 | 64 | Diagnosis Keys: 65 | 1: TEK: b534b9654ba21dcd60a9b3e17d620443, Transmission Risk Level: 5, Validity: 2020-06-13 02:00:00 CEST - 2020-06-14 02:00:00 CEST (2653344, 144) 66 | FOUND MATCH! 67 | RPI Validity: 2020-06-13 12:40:00 CEST - 2020-06-13 12:50:00 CEST (Interval number: 2653408, RPI: 1b013a80678747f73b140e8e3e46a3aa) 68 | 2020-06-13 12:44:12 CEST Attenuation: 43dB (RSSI: -57dBm, AEM: 919c3296, Metadata: 40f20000) 69 | (...) 70 | FOUND MATCH! 71 | RPI Validity: 2020-06-13 12:50:00 CEST - 2020-06-13 13:00:00 CEST (Interval number: 2653409, RPI: 99b8e671e0759ca9532a25ea3f992a8b) 72 | 2020-06-13 12:54:41 CEST Attenuation: 34dB (RSSI: -58dBm, AEM: 36563b98, Metadata: 40e80000) 73 | (...) 74 | FOUND MATCH! 75 | RPI Validity: 2020-06-13 13:00:00 CEST - 2020-06-13 13:10:00 CEST (Interval number: 2653410, RPI: f357370f15be3f7ec06030ca34899223) 76 | 2020-06-13 13:07:20 CEST Attenuation: 34dB (RSSI: -58dBm, AEM: 9be98c37, Metadata: 40e80000) 77 | (...) 78 | ``` 79 | 80 | ## Used by 81 | This tool is used by a number of CWA diagnosis key visualisation projects such as: 82 | 83 | - https://ctt.pfstr.de/ 84 | - https://micb25.github.io/dka/ 85 | - https://covid-19.sledilnik.org/en/ostanizdrav 86 | 87 | -------------------------------------------------------------------------------- /TemporaryExposureKeyExportV1_1_pb2.py: -------------------------------------------------------------------------------- 1 | # -*- coding: utf-8 -*- 2 | # Generated by the protocol buffer compiler. DO NOT EDIT! 3 | # source: TemporaryExposureKeyExportV1_1.proto 4 | 5 | from google.protobuf import descriptor as _descriptor 6 | from google.protobuf import message as _message 7 | from google.protobuf import reflection as _reflection 8 | from google.protobuf import symbol_database as _symbol_database 9 | # @@protoc_insertion_point(imports) 10 | 11 | _sym_db = _symbol_database.Default() 12 | 13 | 14 | 15 | 16 | DESCRIPTOR = _descriptor.FileDescriptor( 17 | name='TemporaryExposureKeyExportV1_1.proto', 18 | package='', 19 | syntax='proto2', 20 | serialized_options=None, 21 | create_key=_descriptor._internal_create_key, 22 | serialized_pb=b'\n TemporaryExposureKeyExportV1_1.proto\"\xd1\x01\n\x1aTemporaryExposureKeyExport\x12\x17\n\x0fstart_timestamp\x18\x01 \x01(\x06\x12\x15\n\rend_timestamp\x18\x02 \x01(\x06\x12\x0e\n\x06region\x18\x03 \x01(\t\x12\x11\n\tbatch_num\x18\x04 \x01(\x05\x12\x12\n\nbatch_size\x18\x05 \x01(\x05\x12\'\n\x0fsignature_infos\x18\x06 \x03(\x0b\x32\x0e.SignatureInfo\x12#\n\x04keys\x18\x07 \x03(\x0b\x32\x15.TemporaryExposureKey\"\x9b\x01\n\rSignatureInfo\x12\x15\n\rapp_bundle_id\x18\x01 \x01(\t\x12\x17\n\x0f\x61ndroid_package\x18\x02 \x01(\t\x12 \n\x18verification_key_version\x18\x03 \x01(\t\x12\x1b\n\x13verification_key_id\x18\x04 \x01(\t\x12\x1b\n\x13signature_algorithm\x18\x05 \x01(\t\"\x8d\x01\n\x14TemporaryExposureKey\x12\x10\n\x08key_data\x18\x01 \x01(\x0c\x12\x1f\n\x17transmission_risk_level\x18\x02 \x01(\x05\x12%\n\x1drolling_start_interval_number\x18\x03 \x01(\x05\x12\x1b\n\x0erolling_period\x18\x04 \x01(\x05:\x03\x31\x34\x34' 23 | ) 24 | 25 | 26 | 27 | 28 | _TEMPORARYEXPOSUREKEYEXPORT = _descriptor.Descriptor( 29 | name='TemporaryExposureKeyExport', 30 | full_name='TemporaryExposureKeyExport', 31 | filename=None, 32 | file=DESCRIPTOR, 33 | containing_type=None, 34 | create_key=_descriptor._internal_create_key, 35 | fields=[ 36 | _descriptor.FieldDescriptor( 37 | name='start_timestamp', full_name='TemporaryExposureKeyExport.start_timestamp', index=0, 38 | number=1, type=6, cpp_type=4, label=1, 39 | has_default_value=False, default_value=0, 40 | message_type=None, enum_type=None, containing_type=None, 41 | is_extension=False, extension_scope=None, 42 | serialized_options=None, file=DESCRIPTOR, create_key=_descriptor._internal_create_key), 43 | _descriptor.FieldDescriptor( 44 | name='end_timestamp', full_name='TemporaryExposureKeyExport.end_timestamp', index=1, 45 | number=2, type=6, cpp_type=4, label=1, 46 | has_default_value=False, default_value=0, 47 | message_type=None, enum_type=None, containing_type=None, 48 | is_extension=False, extension_scope=None, 49 | serialized_options=None, file=DESCRIPTOR, create_key=_descriptor._internal_create_key), 50 | _descriptor.FieldDescriptor( 51 | name='region', full_name='TemporaryExposureKeyExport.region', index=2, 52 | number=3, type=9, cpp_type=9, label=1, 53 | has_default_value=False, default_value=b"".decode('utf-8'), 54 | message_type=None, enum_type=None, containing_type=None, 55 | is_extension=False, extension_scope=None, 56 | serialized_options=None, file=DESCRIPTOR, create_key=_descriptor._internal_create_key), 57 | _descriptor.FieldDescriptor( 58 | name='batch_num', full_name='TemporaryExposureKeyExport.batch_num', index=3, 59 | number=4, type=5, cpp_type=1, label=1, 60 | has_default_value=False, default_value=0, 61 | message_type=None, enum_type=None, containing_type=None, 62 | is_extension=False, extension_scope=None, 63 | serialized_options=None, file=DESCRIPTOR, create_key=_descriptor._internal_create_key), 64 | _descriptor.FieldDescriptor( 65 | name='batch_size', full_name='TemporaryExposureKeyExport.batch_size', index=4, 66 | number=5, type=5, cpp_type=1, label=1, 67 | has_default_value=False, default_value=0, 68 | message_type=None, enum_type=None, containing_type=None, 69 | is_extension=False, extension_scope=None, 70 | serialized_options=None, file=DESCRIPTOR, create_key=_descriptor._internal_create_key), 71 | _descriptor.FieldDescriptor( 72 | name='signature_infos', full_name='TemporaryExposureKeyExport.signature_infos', index=5, 73 | number=6, type=11, cpp_type=10, label=3, 74 | has_default_value=False, default_value=[], 75 | message_type=None, enum_type=None, containing_type=None, 76 | is_extension=False, extension_scope=None, 77 | serialized_options=None, file=DESCRIPTOR, create_key=_descriptor._internal_create_key), 78 | _descriptor.FieldDescriptor( 79 | name='keys', full_name='TemporaryExposureKeyExport.keys', index=6, 80 | number=7, type=11, cpp_type=10, label=3, 81 | has_default_value=False, default_value=[], 82 | message_type=None, enum_type=None, containing_type=None, 83 | is_extension=False, extension_scope=None, 84 | serialized_options=None, file=DESCRIPTOR, create_key=_descriptor._internal_create_key), 85 | ], 86 | extensions=[ 87 | ], 88 | nested_types=[], 89 | enum_types=[ 90 | ], 91 | serialized_options=None, 92 | is_extendable=False, 93 | syntax='proto2', 94 | extension_ranges=[], 95 | oneofs=[ 96 | ], 97 | serialized_start=37, 98 | serialized_end=246, 99 | ) 100 | 101 | 102 | _SIGNATUREINFO = _descriptor.Descriptor( 103 | name='SignatureInfo', 104 | full_name='SignatureInfo', 105 | filename=None, 106 | file=DESCRIPTOR, 107 | containing_type=None, 108 | create_key=_descriptor._internal_create_key, 109 | fields=[ 110 | _descriptor.FieldDescriptor( 111 | name='app_bundle_id', full_name='SignatureInfo.app_bundle_id', index=0, 112 | number=1, type=9, cpp_type=9, label=1, 113 | has_default_value=False, default_value=b"".decode('utf-8'), 114 | message_type=None, enum_type=None, containing_type=None, 115 | is_extension=False, extension_scope=None, 116 | serialized_options=None, file=DESCRIPTOR, create_key=_descriptor._internal_create_key), 117 | _descriptor.FieldDescriptor( 118 | name='android_package', full_name='SignatureInfo.android_package', index=1, 119 | number=2, type=9, cpp_type=9, label=1, 120 | has_default_value=False, default_value=b"".decode('utf-8'), 121 | message_type=None, enum_type=None, containing_type=None, 122 | is_extension=False, extension_scope=None, 123 | serialized_options=None, file=DESCRIPTOR, create_key=_descriptor._internal_create_key), 124 | _descriptor.FieldDescriptor( 125 | name='verification_key_version', full_name='SignatureInfo.verification_key_version', index=2, 126 | number=3, type=9, cpp_type=9, label=1, 127 | has_default_value=False, default_value=b"".decode('utf-8'), 128 | message_type=None, enum_type=None, containing_type=None, 129 | is_extension=False, extension_scope=None, 130 | serialized_options=None, file=DESCRIPTOR, create_key=_descriptor._internal_create_key), 131 | _descriptor.FieldDescriptor( 132 | name='verification_key_id', full_name='SignatureInfo.verification_key_id', index=3, 133 | number=4, type=9, cpp_type=9, label=1, 134 | has_default_value=False, default_value=b"".decode('utf-8'), 135 | message_type=None, enum_type=None, containing_type=None, 136 | is_extension=False, extension_scope=None, 137 | serialized_options=None, file=DESCRIPTOR, create_key=_descriptor._internal_create_key), 138 | _descriptor.FieldDescriptor( 139 | name='signature_algorithm', full_name='SignatureInfo.signature_algorithm', index=4, 140 | number=5, type=9, cpp_type=9, label=1, 141 | has_default_value=False, default_value=b"".decode('utf-8'), 142 | message_type=None, enum_type=None, containing_type=None, 143 | is_extension=False, extension_scope=None, 144 | serialized_options=None, file=DESCRIPTOR, create_key=_descriptor._internal_create_key), 145 | ], 146 | extensions=[ 147 | ], 148 | nested_types=[], 149 | enum_types=[ 150 | ], 151 | serialized_options=None, 152 | is_extendable=False, 153 | syntax='proto2', 154 | extension_ranges=[], 155 | oneofs=[ 156 | ], 157 | serialized_start=249, 158 | serialized_end=404, 159 | ) 160 | 161 | 162 | _TEMPORARYEXPOSUREKEY = _descriptor.Descriptor( 163 | name='TemporaryExposureKey', 164 | full_name='TemporaryExposureKey', 165 | filename=None, 166 | file=DESCRIPTOR, 167 | containing_type=None, 168 | create_key=_descriptor._internal_create_key, 169 | fields=[ 170 | _descriptor.FieldDescriptor( 171 | name='key_data', full_name='TemporaryExposureKey.key_data', index=0, 172 | number=1, type=12, cpp_type=9, label=1, 173 | has_default_value=False, default_value=b"", 174 | message_type=None, enum_type=None, containing_type=None, 175 | is_extension=False, extension_scope=None, 176 | serialized_options=None, file=DESCRIPTOR, create_key=_descriptor._internal_create_key), 177 | _descriptor.FieldDescriptor( 178 | name='transmission_risk_level', full_name='TemporaryExposureKey.transmission_risk_level', index=1, 179 | number=2, type=5, cpp_type=1, label=1, 180 | has_default_value=False, default_value=0, 181 | message_type=None, enum_type=None, containing_type=None, 182 | is_extension=False, extension_scope=None, 183 | serialized_options=None, file=DESCRIPTOR, create_key=_descriptor._internal_create_key), 184 | _descriptor.FieldDescriptor( 185 | name='rolling_start_interval_number', full_name='TemporaryExposureKey.rolling_start_interval_number', index=2, 186 | number=3, type=5, cpp_type=1, label=1, 187 | has_default_value=False, default_value=0, 188 | message_type=None, enum_type=None, containing_type=None, 189 | is_extension=False, extension_scope=None, 190 | serialized_options=None, file=DESCRIPTOR, create_key=_descriptor._internal_create_key), 191 | _descriptor.FieldDescriptor( 192 | name='rolling_period', full_name='TemporaryExposureKey.rolling_period', index=3, 193 | number=4, type=5, cpp_type=1, label=1, 194 | has_default_value=True, default_value=144, 195 | message_type=None, enum_type=None, containing_type=None, 196 | is_extension=False, extension_scope=None, 197 | serialized_options=None, file=DESCRIPTOR, create_key=_descriptor._internal_create_key), 198 | ], 199 | extensions=[ 200 | ], 201 | nested_types=[], 202 | enum_types=[ 203 | ], 204 | serialized_options=None, 205 | is_extendable=False, 206 | syntax='proto2', 207 | extension_ranges=[], 208 | oneofs=[ 209 | ], 210 | serialized_start=407, 211 | serialized_end=548, 212 | ) 213 | 214 | _TEMPORARYEXPOSUREKEYEXPORT.fields_by_name['signature_infos'].message_type = _SIGNATUREINFO 215 | _TEMPORARYEXPOSUREKEYEXPORT.fields_by_name['keys'].message_type = _TEMPORARYEXPOSUREKEY 216 | DESCRIPTOR.message_types_by_name['TemporaryExposureKeyExport'] = _TEMPORARYEXPOSUREKEYEXPORT 217 | DESCRIPTOR.message_types_by_name['SignatureInfo'] = _SIGNATUREINFO 218 | DESCRIPTOR.message_types_by_name['TemporaryExposureKey'] = _TEMPORARYEXPOSUREKEY 219 | _sym_db.RegisterFileDescriptor(DESCRIPTOR) 220 | 221 | TemporaryExposureKeyExport = _reflection.GeneratedProtocolMessageType('TemporaryExposureKeyExport', (_message.Message,), { 222 | 'DESCRIPTOR' : _TEMPORARYEXPOSUREKEYEXPORT, 223 | '__module__' : 'TemporaryExposureKeyExport_pb2' 224 | # @@protoc_insertion_point(class_scope:TemporaryExposureKeyExport) 225 | }) 226 | _sym_db.RegisterMessage(TemporaryExposureKeyExport) 227 | 228 | SignatureInfo = _reflection.GeneratedProtocolMessageType('SignatureInfo', (_message.Message,), { 229 | 'DESCRIPTOR' : _SIGNATUREINFO, 230 | '__module__' : 'TemporaryExposureKeyExport_pb2' 231 | # @@protoc_insertion_point(class_scope:SignatureInfo) 232 | }) 233 | _sym_db.RegisterMessage(SignatureInfo) 234 | 235 | TemporaryExposureKey = _reflection.GeneratedProtocolMessageType('TemporaryExposureKey', (_message.Message,), { 236 | 'DESCRIPTOR' : _TEMPORARYEXPOSUREKEY, 237 | '__module__' : 'TemporaryExposureKeyExport_pb2' 238 | # @@protoc_insertion_point(class_scope:TemporaryExposureKey) 239 | }) 240 | _sym_db.RegisterMessage(TemporaryExposureKey) 241 | 242 | 243 | # @@protoc_insertion_point(module_scope) 244 | -------------------------------------------------------------------------------- /TemporaryExposureKeyExportV1_5_pb2.py: -------------------------------------------------------------------------------- 1 | # -*- coding: utf-8 -*- 2 | # Generated by the protocol buffer compiler. DO NOT EDIT! 3 | # source: TemporaryExposureKeyExportV1_5.proto 4 | 5 | from google.protobuf import descriptor as _descriptor 6 | from google.protobuf import message as _message 7 | from google.protobuf import reflection as _reflection 8 | from google.protobuf import symbol_database as _symbol_database 9 | # @@protoc_insertion_point(imports) 10 | 11 | _sym_db = _symbol_database.Default() 12 | 13 | 14 | 15 | 16 | DESCRIPTOR = _descriptor.FileDescriptor( 17 | name='TemporaryExposureKeyExportV1_5.proto', 18 | package='', 19 | syntax='proto2', 20 | serialized_options=None, 21 | create_key=_descriptor._internal_create_key, 22 | serialized_pb=b'\n$TemporaryExposureKeyExportV1_5.proto\"\xfe\x01\n\x1aTemporaryExposureKeyExport\x12\x17\n\x0fstart_timestamp\x18\x01 \x01(\x06\x12\x15\n\rend_timestamp\x18\x02 \x01(\x06\x12\x0e\n\x06region\x18\x03 \x01(\t\x12\x11\n\tbatch_num\x18\x04 \x01(\x05\x12\x12\n\nbatch_size\x18\x05 \x01(\x05\x12\'\n\x0fsignature_infos\x18\x06 \x03(\x0b\x32\x0e.SignatureInfo\x12#\n\x04keys\x18\x07 \x03(\x0b\x32\x15.TemporaryExposureKey\x12+\n\x0crevised_keys\x18\x08 \x03(\x0b\x32\x15.TemporaryExposureKey\"\x97\x01\n\rSignatureInfo\x12 \n\x18verification_key_version\x18\x03 \x01(\t\x12\x1b\n\x13verification_key_id\x18\x04 \x01(\t\x12\x1b\n\x13signature_algorithm\x18\x05 \x01(\tJ\x04\x08\x01\x10\x02J\x04\x08\x02\x10\x03R\rapp_bundle_idR\x0f\x61ndroid_package\"\xec\x02\n\x14TemporaryExposureKey\x12\x10\n\x08key_data\x18\x01 \x01(\x0c\x12#\n\x17transmission_risk_level\x18\x02 \x01(\x05\x42\x02\x18\x01\x12%\n\x1drolling_start_interval_number\x18\x03 \x01(\x05\x12\x1b\n\x0erolling_period\x18\x04 \x01(\x05:\x03\x31\x34\x34\x12\x35\n\x0breport_type\x18\x05 \x01(\x0e\x32 .TemporaryExposureKey.ReportType\x12$\n\x1c\x64\x61ys_since_onset_of_symptoms\x18\x06 \x01(\x11\"|\n\nReportType\x12\x0b\n\x07UNKNOWN\x10\x00\x12\x12\n\x0e\x43ONFIRMED_TEST\x10\x01\x12 \n\x1c\x43ONFIRMED_CLINICAL_DIAGNOSIS\x10\x02\x12\x0f\n\x0bSELF_REPORT\x10\x03\x12\r\n\tRECURSIVE\x10\x04\x12\x0b\n\x07REVOKED\x10\x05' 23 | ) 24 | 25 | 26 | 27 | _TEMPORARYEXPOSUREKEY_REPORTTYPE = _descriptor.EnumDescriptor( 28 | name='ReportType', 29 | full_name='TemporaryExposureKey.ReportType', 30 | filename=None, 31 | file=DESCRIPTOR, 32 | create_key=_descriptor._internal_create_key, 33 | values=[ 34 | _descriptor.EnumValueDescriptor( 35 | name='UNKNOWN', index=0, number=0, 36 | serialized_options=None, 37 | type=None, 38 | create_key=_descriptor._internal_create_key), 39 | _descriptor.EnumValueDescriptor( 40 | name='CONFIRMED_TEST', index=1, number=1, 41 | serialized_options=None, 42 | type=None, 43 | create_key=_descriptor._internal_create_key), 44 | _descriptor.EnumValueDescriptor( 45 | name='CONFIRMED_CLINICAL_DIAGNOSIS', index=2, number=2, 46 | serialized_options=None, 47 | type=None, 48 | create_key=_descriptor._internal_create_key), 49 | _descriptor.EnumValueDescriptor( 50 | name='SELF_REPORT', index=3, number=3, 51 | serialized_options=None, 52 | type=None, 53 | create_key=_descriptor._internal_create_key), 54 | _descriptor.EnumValueDescriptor( 55 | name='RECURSIVE', index=4, number=4, 56 | serialized_options=None, 57 | type=None, 58 | create_key=_descriptor._internal_create_key), 59 | _descriptor.EnumValueDescriptor( 60 | name='REVOKED', index=5, number=5, 61 | serialized_options=None, 62 | type=None, 63 | create_key=_descriptor._internal_create_key), 64 | ], 65 | containing_type=None, 66 | serialized_options=None, 67 | serialized_start=692, 68 | serialized_end=816, 69 | ) 70 | _sym_db.RegisterEnumDescriptor(_TEMPORARYEXPOSUREKEY_REPORTTYPE) 71 | 72 | 73 | _TEMPORARYEXPOSUREKEYEXPORT = _descriptor.Descriptor( 74 | name='TemporaryExposureKeyExport', 75 | full_name='TemporaryExposureKeyExport', 76 | filename=None, 77 | file=DESCRIPTOR, 78 | containing_type=None, 79 | create_key=_descriptor._internal_create_key, 80 | fields=[ 81 | _descriptor.FieldDescriptor( 82 | name='start_timestamp', full_name='TemporaryExposureKeyExport.start_timestamp', index=0, 83 | number=1, type=6, cpp_type=4, label=1, 84 | has_default_value=False, default_value=0, 85 | message_type=None, enum_type=None, containing_type=None, 86 | is_extension=False, extension_scope=None, 87 | serialized_options=None, file=DESCRIPTOR, create_key=_descriptor._internal_create_key), 88 | _descriptor.FieldDescriptor( 89 | name='end_timestamp', full_name='TemporaryExposureKeyExport.end_timestamp', index=1, 90 | number=2, type=6, cpp_type=4, label=1, 91 | has_default_value=False, default_value=0, 92 | message_type=None, enum_type=None, containing_type=None, 93 | is_extension=False, extension_scope=None, 94 | serialized_options=None, file=DESCRIPTOR, create_key=_descriptor._internal_create_key), 95 | _descriptor.FieldDescriptor( 96 | name='region', full_name='TemporaryExposureKeyExport.region', index=2, 97 | number=3, type=9, cpp_type=9, label=1, 98 | has_default_value=False, default_value=b"".decode('utf-8'), 99 | message_type=None, enum_type=None, containing_type=None, 100 | is_extension=False, extension_scope=None, 101 | serialized_options=None, file=DESCRIPTOR, create_key=_descriptor._internal_create_key), 102 | _descriptor.FieldDescriptor( 103 | name='batch_num', full_name='TemporaryExposureKeyExport.batch_num', index=3, 104 | number=4, type=5, cpp_type=1, label=1, 105 | has_default_value=False, default_value=0, 106 | message_type=None, enum_type=None, containing_type=None, 107 | is_extension=False, extension_scope=None, 108 | serialized_options=None, file=DESCRIPTOR, create_key=_descriptor._internal_create_key), 109 | _descriptor.FieldDescriptor( 110 | name='batch_size', full_name='TemporaryExposureKeyExport.batch_size', index=4, 111 | number=5, type=5, cpp_type=1, label=1, 112 | has_default_value=False, default_value=0, 113 | message_type=None, enum_type=None, containing_type=None, 114 | is_extension=False, extension_scope=None, 115 | serialized_options=None, file=DESCRIPTOR, create_key=_descriptor._internal_create_key), 116 | _descriptor.FieldDescriptor( 117 | name='signature_infos', full_name='TemporaryExposureKeyExport.signature_infos', index=5, 118 | number=6, type=11, cpp_type=10, label=3, 119 | has_default_value=False, default_value=[], 120 | message_type=None, enum_type=None, containing_type=None, 121 | is_extension=False, extension_scope=None, 122 | serialized_options=None, file=DESCRIPTOR, create_key=_descriptor._internal_create_key), 123 | _descriptor.FieldDescriptor( 124 | name='keys', full_name='TemporaryExposureKeyExport.keys', index=6, 125 | number=7, type=11, cpp_type=10, label=3, 126 | has_default_value=False, default_value=[], 127 | message_type=None, enum_type=None, containing_type=None, 128 | is_extension=False, extension_scope=None, 129 | serialized_options=None, file=DESCRIPTOR, create_key=_descriptor._internal_create_key), 130 | _descriptor.FieldDescriptor( 131 | name='revised_keys', full_name='TemporaryExposureKeyExport.revised_keys', index=7, 132 | number=8, type=11, cpp_type=10, label=3, 133 | has_default_value=False, default_value=[], 134 | message_type=None, enum_type=None, containing_type=None, 135 | is_extension=False, extension_scope=None, 136 | serialized_options=None, file=DESCRIPTOR, create_key=_descriptor._internal_create_key), 137 | ], 138 | extensions=[ 139 | ], 140 | nested_types=[], 141 | enum_types=[ 142 | ], 143 | serialized_options=None, 144 | is_extendable=False, 145 | syntax='proto2', 146 | extension_ranges=[], 147 | oneofs=[ 148 | ], 149 | serialized_start=41, 150 | serialized_end=295, 151 | ) 152 | 153 | 154 | _SIGNATUREINFO = _descriptor.Descriptor( 155 | name='SignatureInfo', 156 | full_name='SignatureInfo', 157 | filename=None, 158 | file=DESCRIPTOR, 159 | containing_type=None, 160 | create_key=_descriptor._internal_create_key, 161 | fields=[ 162 | _descriptor.FieldDescriptor( 163 | name='verification_key_version', full_name='SignatureInfo.verification_key_version', index=0, 164 | number=3, type=9, cpp_type=9, label=1, 165 | has_default_value=False, default_value=b"".decode('utf-8'), 166 | message_type=None, enum_type=None, containing_type=None, 167 | is_extension=False, extension_scope=None, 168 | serialized_options=None, file=DESCRIPTOR, create_key=_descriptor._internal_create_key), 169 | _descriptor.FieldDescriptor( 170 | name='verification_key_id', full_name='SignatureInfo.verification_key_id', index=1, 171 | number=4, type=9, cpp_type=9, label=1, 172 | has_default_value=False, default_value=b"".decode('utf-8'), 173 | message_type=None, enum_type=None, containing_type=None, 174 | is_extension=False, extension_scope=None, 175 | serialized_options=None, file=DESCRIPTOR, create_key=_descriptor._internal_create_key), 176 | _descriptor.FieldDescriptor( 177 | name='signature_algorithm', full_name='SignatureInfo.signature_algorithm', index=2, 178 | number=5, type=9, cpp_type=9, label=1, 179 | has_default_value=False, default_value=b"".decode('utf-8'), 180 | message_type=None, enum_type=None, containing_type=None, 181 | is_extension=False, extension_scope=None, 182 | serialized_options=None, file=DESCRIPTOR, create_key=_descriptor._internal_create_key), 183 | ], 184 | extensions=[ 185 | ], 186 | nested_types=[], 187 | enum_types=[ 188 | ], 189 | serialized_options=None, 190 | is_extendable=False, 191 | syntax='proto2', 192 | extension_ranges=[], 193 | oneofs=[ 194 | ], 195 | serialized_start=298, 196 | serialized_end=449, 197 | ) 198 | 199 | 200 | _TEMPORARYEXPOSUREKEY = _descriptor.Descriptor( 201 | name='TemporaryExposureKey', 202 | full_name='TemporaryExposureKey', 203 | filename=None, 204 | file=DESCRIPTOR, 205 | containing_type=None, 206 | create_key=_descriptor._internal_create_key, 207 | fields=[ 208 | _descriptor.FieldDescriptor( 209 | name='key_data', full_name='TemporaryExposureKey.key_data', index=0, 210 | number=1, type=12, cpp_type=9, label=1, 211 | has_default_value=False, default_value=b"", 212 | message_type=None, enum_type=None, containing_type=None, 213 | is_extension=False, extension_scope=None, 214 | serialized_options=None, file=DESCRIPTOR, create_key=_descriptor._internal_create_key), 215 | _descriptor.FieldDescriptor( 216 | name='transmission_risk_level', full_name='TemporaryExposureKey.transmission_risk_level', index=1, 217 | number=2, type=5, cpp_type=1, label=1, 218 | has_default_value=False, default_value=0, 219 | message_type=None, enum_type=None, containing_type=None, 220 | is_extension=False, extension_scope=None, 221 | serialized_options=b'\030\001', file=DESCRIPTOR, create_key=_descriptor._internal_create_key), 222 | _descriptor.FieldDescriptor( 223 | name='rolling_start_interval_number', full_name='TemporaryExposureKey.rolling_start_interval_number', index=2, 224 | number=3, type=5, cpp_type=1, label=1, 225 | has_default_value=False, default_value=0, 226 | message_type=None, enum_type=None, containing_type=None, 227 | is_extension=False, extension_scope=None, 228 | serialized_options=None, file=DESCRIPTOR, create_key=_descriptor._internal_create_key), 229 | _descriptor.FieldDescriptor( 230 | name='rolling_period', full_name='TemporaryExposureKey.rolling_period', index=3, 231 | number=4, type=5, cpp_type=1, label=1, 232 | has_default_value=True, default_value=144, 233 | message_type=None, enum_type=None, containing_type=None, 234 | is_extension=False, extension_scope=None, 235 | serialized_options=None, file=DESCRIPTOR, create_key=_descriptor._internal_create_key), 236 | _descriptor.FieldDescriptor( 237 | name='report_type', full_name='TemporaryExposureKey.report_type', index=4, 238 | number=5, type=14, cpp_type=8, label=1, 239 | has_default_value=False, default_value=0, 240 | message_type=None, enum_type=None, containing_type=None, 241 | is_extension=False, extension_scope=None, 242 | serialized_options=None, file=DESCRIPTOR, create_key=_descriptor._internal_create_key), 243 | _descriptor.FieldDescriptor( 244 | name='days_since_onset_of_symptoms', full_name='TemporaryExposureKey.days_since_onset_of_symptoms', index=5, 245 | number=6, type=17, cpp_type=1, label=1, 246 | has_default_value=False, default_value=0, 247 | message_type=None, enum_type=None, containing_type=None, 248 | is_extension=False, extension_scope=None, 249 | serialized_options=None, file=DESCRIPTOR, create_key=_descriptor._internal_create_key), 250 | ], 251 | extensions=[ 252 | ], 253 | nested_types=[], 254 | enum_types=[ 255 | _TEMPORARYEXPOSUREKEY_REPORTTYPE, 256 | ], 257 | serialized_options=None, 258 | is_extendable=False, 259 | syntax='proto2', 260 | extension_ranges=[], 261 | oneofs=[ 262 | ], 263 | serialized_start=452, 264 | serialized_end=816, 265 | ) 266 | 267 | _TEMPORARYEXPOSUREKEYEXPORT.fields_by_name['signature_infos'].message_type = _SIGNATUREINFO 268 | _TEMPORARYEXPOSUREKEYEXPORT.fields_by_name['keys'].message_type = _TEMPORARYEXPOSUREKEY 269 | _TEMPORARYEXPOSUREKEYEXPORT.fields_by_name['revised_keys'].message_type = _TEMPORARYEXPOSUREKEY 270 | _TEMPORARYEXPOSUREKEY.fields_by_name['report_type'].enum_type = _TEMPORARYEXPOSUREKEY_REPORTTYPE 271 | _TEMPORARYEXPOSUREKEY_REPORTTYPE.containing_type = _TEMPORARYEXPOSUREKEY 272 | DESCRIPTOR.message_types_by_name['TemporaryExposureKeyExport'] = _TEMPORARYEXPOSUREKEYEXPORT 273 | DESCRIPTOR.message_types_by_name['SignatureInfo'] = _SIGNATUREINFO 274 | DESCRIPTOR.message_types_by_name['TemporaryExposureKey'] = _TEMPORARYEXPOSUREKEY 275 | _sym_db.RegisterFileDescriptor(DESCRIPTOR) 276 | 277 | TemporaryExposureKeyExport = _reflection.GeneratedProtocolMessageType('TemporaryExposureKeyExport', (_message.Message,), { 278 | 'DESCRIPTOR' : _TEMPORARYEXPOSUREKEYEXPORT, 279 | '__module__' : 'TemporaryExposureKeyExportV1.5_pb2' 280 | # @@protoc_insertion_point(class_scope:TemporaryExposureKeyExport) 281 | }) 282 | _sym_db.RegisterMessage(TemporaryExposureKeyExport) 283 | 284 | SignatureInfo = _reflection.GeneratedProtocolMessageType('SignatureInfo', (_message.Message,), { 285 | 'DESCRIPTOR' : _SIGNATUREINFO, 286 | '__module__' : 'TemporaryExposureKeyExportV1.5_pb2' 287 | # @@protoc_insertion_point(class_scope:SignatureInfo) 288 | }) 289 | _sym_db.RegisterMessage(SignatureInfo) 290 | 291 | TemporaryExposureKey = _reflection.GeneratedProtocolMessageType('TemporaryExposureKey', (_message.Message,), { 292 | 'DESCRIPTOR' : _TEMPORARYEXPOSUREKEY, 293 | '__module__' : 'TemporaryExposureKeyExportV1.5_pb2' 294 | # @@protoc_insertion_point(class_scope:TemporaryExposureKey) 295 | }) 296 | _sym_db.RegisterMessage(TemporaryExposureKey) 297 | 298 | 299 | _TEMPORARYEXPOSUREKEY.fields_by_name['transmission_risk_level']._options = None 300 | # @@protoc_insertion_point(module_scope) 301 | -------------------------------------------------------------------------------- /count_keys.py: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env python3 2 | 3 | from lib.diagnosis_keys import * 4 | from lib.conversions import * 5 | import argparse 6 | from lib.diagnosis_key import DiagnosisKey 7 | from lib.count_users_v1_5 import count_users 8 | 9 | parser = argparse.ArgumentParser(description="Exposure Notification Diagnosis Key Parser / Counter.", 10 | formatter_class=argparse.ArgumentDefaultsHelpFormatter) 11 | parser.add_argument("-d", "--diagnosiskeys", type=str, 12 | help="file name of the Diagnosis Keys .zip file") 13 | parser.add_argument("-t", "--print-metadata", action="store_true", 14 | help="print metadata from the Diagnosis Keys .zip file") 15 | parser.add_argument("-k", "--print-keys", action="store_true", 16 | help="print all keys from the Diagnosis Keys .zip file") 17 | parser.add_argument("-m", "--multiplier", type=int, default=1, 18 | help="padding multiplier (RANDOM_KEY_PADDING_MULTIPLIER as set on cwa-server)") 19 | parser.add_argument("-a", "--auto-multiplier", action="store_true", 20 | help="automatically detect the multiplier (range 1..10)") 21 | args = parser.parse_args() 22 | 23 | dk_file_name = args.diagnosiskeys 24 | 25 | print("Exposure Notification Diagnosis Key Parser / Counter") 26 | print("This script counts published Diagnosis Keys.\n") 27 | # see https://github.com/google/exposure-notifications-server/tree/master/examples/export 28 | 29 | dk = DiagnosisKeys(dk_file_name) 30 | print("File '%s' read." % dk_file_name) 31 | 32 | start_timestamp = dk.get_upload_start_timestamp() 33 | end_timestamp = dk.get_upload_end_timestamp() 34 | if args.print_metadata: 35 | print("- Time window: %s - %s" % (get_string_from_datetime(start_timestamp), 36 | get_string_from_datetime(end_timestamp))) 37 | print("- Region: %s" % dk.get_region()) 38 | print("- Batch: %d of %d" % (dk.get_batch_num(), dk.get_batch_size())) 39 | print("- # of keys in batch: %d" % len(dk.get_keys())) 40 | 41 | for signature_info in dk.get_signature_infos(): 42 | print("- Signature Info:") 43 | print(signature_info) 44 | 45 | dk_list = [] 46 | 47 | keys = None 48 | for _ in [0, 1]: 49 | if _ == 0: 50 | keys = dk.get_keys() 51 | if args.print_keys: 52 | print("Diagnosis Keys:") 53 | elif _ == 1: 54 | keys = dk.get_revised_keys() 55 | if args.print_keys: 56 | print("\nRevised Diagnosis Keys:") 57 | if args.print_keys: 58 | if len(keys) == 0: 59 | print("(none)\n") 60 | 61 | count = 0 62 | for tek in keys: 63 | count += 1 64 | start_timestamp = \ 65 | get_datetime_from_utc_timestamp(get_timestamp_from_interval(tek.rolling_start_interval_number)) 66 | end_timestamp = \ 67 | get_datetime_from_utc_timestamp(get_timestamp_from_interval(tek.rolling_start_interval_number + 68 | tek.rolling_period)) 69 | 70 | if args.print_keys: 71 | print("%5d: TEK: %s, Transmission Risk Level: %s, Validity: %s - %s (%d, %d)" % 72 | (count, tek.key_data.hex(), tek.transmission_risk_level, 73 | get_string_from_datetime(start_timestamp), 74 | get_string_from_datetime(end_timestamp), 75 | tek.rolling_start_interval_number, tek.rolling_period), 76 | end='') 77 | if tek.HasField("report_type"): 78 | field_types = ["UNKNOWN", "CONFIRMED_TEST", "CONFIRMED_CLINICAL_DIAGNOSIS", 79 | "SELF_REPORT", "RECURSIVE", "REVOKED"] 80 | print(", Report Type: %s" % field_types[tek.report_type], end='') 81 | if tek.HasField("days_since_onset_of_symptoms"): 82 | print(", Days since onset of symptoms: %d" % tek.days_since_onset_of_symptoms, end='') 83 | print() 84 | 85 | dk_list.append(DiagnosisKey(tek.key_data, tek.rolling_start_interval_number, tek.rolling_period, 86 | tek.transmission_risk_level)) 87 | 88 | count_users(dk_list, padding_multiplier=args.multiplier, auto_multiplier_detect=args.auto_multiplier) 89 | -------------------------------------------------------------------------------- /create_demo_key_set.py: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env python3 2 | 3 | from lib.diagnosis_keys_write import * 4 | import argparse 5 | 6 | parser = argparse.ArgumentParser(description="Exposure Notification Demo Diagnosis Key Set Generator.", 7 | formatter_class=argparse.ArgumentDefaultsHelpFormatter) 8 | parser.add_argument("-d", "--diagnosiskeys", type=str, default="demo_dks.zip", 9 | help="file name of the Diagnosis Keys .zip file that should be generated") 10 | args = parser.parse_args() 11 | 12 | dk_file_name = args.diagnosiskeys 13 | 14 | print("Exposure Notification Demo Diagnosis Key Set Generator") 15 | print("This script generates a Demo Diagnosis Keys Set for apps that parse these keys.\n") 16 | 17 | dk = DiagnosisKeysWriter(dk_file_name) 18 | print("File '%s' written." % dk_file_name) 19 | 20 | -------------------------------------------------------------------------------- /derive_aem_key.py: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env python3 2 | 3 | from lib.crypto import * 4 | import argparse 5 | 6 | parser = argparse.ArgumentParser(description="Derive AEM-Key from TEK.") 7 | parser.add_argument("TEK", type=str, 8 | help="TEK (16 bytes hex)") 9 | args = parser.parse_args() 10 | 11 | try: 12 | tek = bytes.fromhex(args.TEK) 13 | if len(tek) != 16: 14 | raise ValueError 15 | except ValueError: 16 | parser.error("TEK must be 16 bytes hex") 17 | 18 | # print("TEK: %s" % tek.hex()) 19 | print(derive_aem_key(tek).hex()) 20 | -------------------------------------------------------------------------------- /derive_rpi_key.py: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env python3 2 | 3 | from lib.crypto import * 4 | import argparse 5 | 6 | parser = argparse.ArgumentParser(description="Derive RPI-Key from TEK.") 7 | parser.add_argument("TEK", type=str, 8 | help="TEK (16 bytes hex)") 9 | args = parser.parse_args() 10 | 11 | try: 12 | tek = bytes.fromhex(args.TEK) 13 | if len(tek) != 16: 14 | raise ValueError 15 | except ValueError: 16 | parser.error("TEK must be 16 bytes hex") 17 | 18 | # print("TEK: %s" % tek.hex()) 19 | print(derive_rpi_key(tek).hex()) 20 | -------------------------------------------------------------------------------- /doc/algorithm.md: -------------------------------------------------------------------------------- 1 | ## TRL Profile 2 | 3 | The TRL (transmission risk level) profile determines the TRL that is attached to each Diagnosis Key. 4 | For each day in the past, a value from this list is selected by the cwa-app: 5 | ``` 6 | trl_profile = [5, 6, 8, 8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1] # 0: today, 1: yesterday, ... 7 | ``` 8 | Today's key is not uploaded, so the maximum numbers of keys that can be uploaded is 13. 9 | (Case 4 / Fig. 14 in https://github.com/corona-warn-app/cwa-documentation/blob/master/transmission_risk.pdf) 10 | 11 | ## Counting Users 12 | 13 | After https://github.com/corona-warn-app/cwa-app-android/issues/678 14 | was fixed, and using a Android app that contains the fix is now enforced by cwa-server, 15 | every user will - at the moment - at least submit exactly one key with TRL == 6. 16 | So this could be used to count the number of users submitting keys. 17 | Note that this can change when https://github.com/corona-warn-app/cwa-documentation/issues/343 18 | will be fixed, because then a user might upload older keys, but not yesterday's key. 19 | 20 | ## Counting Keys per User 21 | 22 | A simple algorithm tracks the TRL profile chain through the list of Diagnosis Keys and stops at 13, 23 | or when it doesn't find the correct TRL in any keys from the previous day. Each found key is counted 24 | and then deleted from the list. 25 | 26 | However there is a problem with _missing keys_: 27 | The simple algorithm fails if a user has stopped Exposure Notifications for at least one day, 28 | because then a key was not generated nor uploaded for that day. This would result in non-parsed keys. 29 | 30 | Before we improve the algorithm, let's first look at corner cases that could happen. 31 | 32 | Assuming the currently uploaded TRL profiles (with #343 not fixed), _missing keys_ would require that 33 | the algorithm searches for a key with the previous day's TRL not only in previous day's keys, but also 34 | in older keys, for up to -13 days. If TRL paths cross, the wrong path might be followed, but that would 35 | still yield correct counts. 36 | 37 | With #343 fixed, _missing keys_ could cause scenarios like these: 38 | 39 | ``` 40 | 01 02 03 04 05 06 07 08 09 10 11 12 13 41 | user a 8 8 8 5 3 # 5 keys 42 | user b 1 1 1 1 1 1 1 # 7 keys 43 | user c 6 # 1 key 44 | 45 | mixed 6 8 8 8 5 3 1 1 1 1 1 1 1 # 1 user with 13 keys 46 | ``` 47 | ``` 48 | 01 02 03 04 05 06 07 08 09 10 11 12 13 49 | user a 6 8 8 8 5 3 1 # 7 keys 50 | user b 1 1 1 1 1 1 1 # 7 keys 51 | 52 | mixed 6 8 8 8 5 3 1 1 1 1 1 1 1 # 1 user with 13 keys 53 | 1 # 1 user with 1 key 54 | ``` 55 | So with #343 fixed, the result of the (desired) anonymization on the server would be that 56 | the number of users counted by the algorithm will likely be **lower than in reality** 57 | and the keys per user cannot be counted correctly anymore. 58 | -------------------------------------------------------------------------------- /lib/__init__.py: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/mh-/diagnosis-keys/25cebbd24204200f9b986dffeaf0133cdd74727f/lib/__init__.py -------------------------------------------------------------------------------- /lib/contact_records_pb2.py: -------------------------------------------------------------------------------- 1 | # -*- coding: utf-8 -*- 2 | # Generated by the protocol buffer compiler. DO NOT EDIT! 3 | # source: contact_records.proto 4 | 5 | from google.protobuf import descriptor as _descriptor 6 | from google.protobuf import message as _message 7 | from google.protobuf import reflection as _reflection 8 | from google.protobuf import symbol_database as _symbol_database 9 | # @@protoc_insertion_point(imports) 10 | 11 | _sym_db = _symbol_database.Default() 12 | 13 | 14 | 15 | 16 | DESCRIPTOR = _descriptor.FileDescriptor( 17 | name='contact_records.proto', 18 | package='gms.en', 19 | syntax='proto2', 20 | serialized_options=None, 21 | create_key=_descriptor._internal_create_key, 22 | serialized_pb=b'\n\x15\x63ontact_records.proto\x12\x06gms.en\":\n\nScanRecord\x12\x11\n\ttimestamp\x18\x01 \x01(\r\x12\x0c\n\x04rssi\x18\x03 \x01(\x03\x12\x0b\n\x03\x61\x65m\x18\x04 \x01(\x0c\"8\n\x0e\x43ontactRecords\x12&\n\nscanrecord\x18\x01 \x03(\x0b\x32\x12.gms.en.ScanRecord' 23 | ) 24 | 25 | 26 | 27 | 28 | _SCANRECORD = _descriptor.Descriptor( 29 | name='ScanRecord', 30 | full_name='gms.en.ScanRecord', 31 | filename=None, 32 | file=DESCRIPTOR, 33 | containing_type=None, 34 | create_key=_descriptor._internal_create_key, 35 | fields=[ 36 | _descriptor.FieldDescriptor( 37 | name='timestamp', full_name='gms.en.ScanRecord.timestamp', index=0, 38 | number=1, type=13, cpp_type=3, label=1, 39 | has_default_value=False, default_value=0, 40 | message_type=None, enum_type=None, containing_type=None, 41 | is_extension=False, extension_scope=None, 42 | serialized_options=None, file=DESCRIPTOR, create_key=_descriptor._internal_create_key), 43 | _descriptor.FieldDescriptor( 44 | name='rssi', full_name='gms.en.ScanRecord.rssi', index=1, 45 | number=3, type=3, cpp_type=2, label=1, 46 | has_default_value=False, default_value=0, 47 | message_type=None, enum_type=None, containing_type=None, 48 | is_extension=False, extension_scope=None, 49 | serialized_options=None, file=DESCRIPTOR, create_key=_descriptor._internal_create_key), 50 | _descriptor.FieldDescriptor( 51 | name='aem', full_name='gms.en.ScanRecord.aem', index=2, 52 | number=4, type=12, cpp_type=9, label=1, 53 | has_default_value=False, default_value=b"", 54 | message_type=None, enum_type=None, containing_type=None, 55 | is_extension=False, extension_scope=None, 56 | serialized_options=None, file=DESCRIPTOR, create_key=_descriptor._internal_create_key), 57 | ], 58 | extensions=[ 59 | ], 60 | nested_types=[], 61 | enum_types=[ 62 | ], 63 | serialized_options=None, 64 | is_extendable=False, 65 | syntax='proto2', 66 | extension_ranges=[], 67 | oneofs=[ 68 | ], 69 | serialized_start=33, 70 | serialized_end=91, 71 | ) 72 | 73 | 74 | _CONTACTRECORDS = _descriptor.Descriptor( 75 | name='ContactRecords', 76 | full_name='gms.en.ContactRecords', 77 | filename=None, 78 | file=DESCRIPTOR, 79 | containing_type=None, 80 | create_key=_descriptor._internal_create_key, 81 | fields=[ 82 | _descriptor.FieldDescriptor( 83 | name='scanrecord', full_name='gms.en.ContactRecords.scanrecord', index=0, 84 | number=1, type=11, cpp_type=10, label=3, 85 | has_default_value=False, default_value=[], 86 | message_type=None, enum_type=None, containing_type=None, 87 | is_extension=False, extension_scope=None, 88 | serialized_options=None, file=DESCRIPTOR, create_key=_descriptor._internal_create_key), 89 | ], 90 | extensions=[ 91 | ], 92 | nested_types=[], 93 | enum_types=[ 94 | ], 95 | serialized_options=None, 96 | is_extendable=False, 97 | syntax='proto2', 98 | extension_ranges=[], 99 | oneofs=[ 100 | ], 101 | serialized_start=93, 102 | serialized_end=149, 103 | ) 104 | 105 | _CONTACTRECORDS.fields_by_name['scanrecord'].message_type = _SCANRECORD 106 | DESCRIPTOR.message_types_by_name['ScanRecord'] = _SCANRECORD 107 | DESCRIPTOR.message_types_by_name['ContactRecords'] = _CONTACTRECORDS 108 | _sym_db.RegisterFileDescriptor(DESCRIPTOR) 109 | 110 | ScanRecord = _reflection.GeneratedProtocolMessageType('ScanRecord', (_message.Message,), { 111 | 'DESCRIPTOR' : _SCANRECORD, 112 | '__module__' : 'contact_records_pb2' 113 | # @@protoc_insertion_point(class_scope:gms.en.ScanRecord) 114 | }) 115 | _sym_db.RegisterMessage(ScanRecord) 116 | 117 | ContactRecords = _reflection.GeneratedProtocolMessageType('ContactRecords', (_message.Message,), { 118 | 'DESCRIPTOR' : _CONTACTRECORDS, 119 | '__module__' : 'contact_records_pb2' 120 | # @@protoc_insertion_point(class_scope:gms.en.ContactRecords) 121 | }) 122 | _sym_db.RegisterMessage(ContactRecords) 123 | 124 | 125 | # @@protoc_insertion_point(module_scope) 126 | -------------------------------------------------------------------------------- /lib/conversions.py: -------------------------------------------------------------------------------- 1 | import datetime 2 | 3 | interval_length_minutes = 10 # 10 minutes per interval 4 | tek_rolling_period = 144 # 24*60//10 - 24 hours per day, 60 minutes per hour, 10 minutes per interval 5 | 6 | 7 | def get_timestamp_from_interval(interval_number): 8 | return interval_number * interval_length_minutes * 60 # 60 seconds per minute 9 | 10 | 11 | def get_interval_from_utc_timestamp(utc_time_stamp): 12 | return utc_time_stamp // (interval_length_minutes * 60) # 60 seconds per minute 13 | 14 | 15 | def get_datetime_from_utc_timestamp(utc_timestamp): 16 | return datetime.datetime.utcfromtimestamp(utc_timestamp).replace(tzinfo=datetime.timezone.utc) 17 | 18 | 19 | def get_timestamp_from_utc_datetime(utc_datetime): 20 | return int(datetime.datetime.timestamp(utc_datetime)) 21 | 22 | 23 | def get_local_datetime(date_time): 24 | return date_time.astimezone(datetime.datetime.utcnow().astimezone().tzinfo) 25 | 26 | 27 | def get_string_from_datetime(date_time): 28 | return date_time.strftime('%Y-%m-%d %H:%M:%S %Z') 29 | -------------------------------------------------------------------------------- /lib/count_users.py: -------------------------------------------------------------------------------- 1 | trl_profile = [5, 6, 8, 8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1] # 0: today, 1: yesterday, ... 2 | 3 | 4 | def count_users(diagnosis_key_list, multiplier=10, auto_multiplier_detect=False, 5 | new_android_apps_only=False): 6 | print("Parsing the Diagnosis Key list, counting unique users...") 7 | original_len = len(diagnosis_key_list) 8 | if not auto_multiplier_detect: 9 | print("Length: %d keys (%d without padding)" % (original_len, original_len // multiplier)) 10 | if len(diagnosis_key_list) % multiplier != 0: 11 | print("WARNING: Apparently the list is not padded by %d!" % multiplier) 12 | else: 13 | print("Length: %d keys" % original_len) 14 | 15 | user_days = [] 16 | num_old_android_apps = 0 17 | 18 | if len(diagnosis_key_list) > 0: 19 | latest_interval = max(dk.start_interval for dk in diagnosis_key_list) 20 | min_interval = latest_interval - 14*144 21 | else: 22 | # no keys provided, skip user count 23 | print("%d user(s) found." % 0) 24 | return 25 | 26 | if not new_android_apps_only: 27 | search_range = [0, 1] 28 | else: 29 | search_range = range(0, 15) 30 | 31 | for i in search_range: 32 | # do this twice, because if keys are distributed in the morning, 33 | # they could include yesterday's submissions 34 | 35 | if not new_android_apps_only: 36 | # First search for 'invalid' TRL profiles, caused by old Android apps 37 | # (before this fix was released: https://github.com/corona-warn-app/cwa-app-android/pull/679) 38 | 39 | if len(diagnosis_key_list) > 0: 40 | top_level_dks = [dk for dk in diagnosis_key_list if dk.start_interval == latest_interval] 41 | for dk in top_level_dks: 42 | try: 43 | pos = trl_profile[2:].index(dk.transmission_risk_level)+2 44 | except ValueError: 45 | continue 46 | diagnosis_key_list.remove(dk) 47 | days = 1 48 | interval = latest_interval 49 | while pos > 1: 50 | interval -= 144 51 | next_dk = next((dk_entry for dk_entry in diagnosis_key_list 52 | if (dk_entry.start_interval == interval) and 53 | (dk_entry.transmission_risk_level == trl_profile[pos-1])), None) 54 | if (next_dk is None) and (trl_profile[pos] == 8): 55 | pos += 1 56 | next_dk = next((dk_entry for dk_entry in diagnosis_key_list 57 | if (dk_entry.start_interval == interval) and 58 | (dk_entry.transmission_risk_level == trl_profile[pos - 1])), None) 59 | if next_dk is None: 60 | break 61 | diagnosis_key_list.remove(next_dk) 62 | days += 1 63 | pos -= 1 64 | user_days.append(days) 65 | num_old_android_apps += 1 66 | 67 | # Now search for 'standard' TRL profiles 68 | 69 | if len(diagnosis_key_list) > 0: 70 | top_level_dks = [dk for dk in diagnosis_key_list if dk.start_interval == latest_interval] 71 | for dk in top_level_dks: 72 | days = 0 73 | if dk.transmission_risk_level == trl_profile[1]: # newest entry is from yesterday 74 | diagnosis_key_list.remove(dk) 75 | days = 1 76 | interval = latest_interval 77 | while days < len(trl_profile)-1: 78 | interval -= 144 79 | if not new_android_apps_only: 80 | next_dk = next((dk_entry for dk_entry in diagnosis_key_list 81 | if (dk_entry.start_interval == interval) and 82 | (dk_entry.transmission_risk_level == trl_profile[days+1])), 83 | None) 84 | else: # new_android_apps_only 85 | next_dk = None 86 | while interval >= min_interval: 87 | next_dk = next((dk_entry for dk_entry in diagnosis_key_list 88 | if (dk_entry.start_interval == interval) and 89 | (dk_entry.transmission_risk_level == trl_profile[days + 1])), 90 | None) 91 | if next_dk is not None: 92 | break 93 | interval -= 144 94 | 95 | if next_dk is None: 96 | break 97 | diagnosis_key_list.remove(next_dk) 98 | days += 1 99 | user_days.append(days) 100 | 101 | latest_interval -= 144 102 | 103 | days_count = [0] * 15 104 | for entry in user_days: 105 | days_count[entry] += 1 106 | 107 | if auto_multiplier_detect: 108 | relevant_values = [original_len, len(diagnosis_key_list), len(user_days), num_old_android_apps] 109 | relevant_values.extend(days_count) 110 | for multiplier_candidate in reversed(range(1, multiplier+1)): 111 | candidate_suitable = True 112 | for value in relevant_values: 113 | if not value % multiplier_candidate == 0: 114 | candidate_suitable = False 115 | break 116 | if candidate_suitable: 117 | # (we will reach this latest with multiplier_candidate == 1) 118 | multiplier = multiplier_candidate 119 | break 120 | print("Padding Multiplier detected: %d" % multiplier) 121 | 122 | reduced_users = len(user_days) // multiplier 123 | print("%d user(s) found." % reduced_users) 124 | 125 | reduced_days_count = [days // multiplier for days in days_count] 126 | print("They submitted these numbers of keys:") 127 | days = 0 128 | for count in reduced_days_count: 129 | if count > 0: 130 | if days > 0: 131 | print("%d user(s): %d Diagnosis Key(s)" % (count, days)) 132 | else: 133 | print("%d user(s): Invalid Transmission Risk Profile" % count) 134 | days += 1 135 | 136 | if num_old_android_apps > 0: 137 | print("Old Android app used by %d user(s)." % (num_old_android_apps // multiplier)) 138 | print("%d keys not parsed (%d without padding)." % (len(diagnosis_key_list), len(diagnosis_key_list) // multiplier)) 139 | 140 | # print statistics / https://github.com/corona-warn-app/cwa-documentation/issues/258#issuecomment-649007240 141 | print("%d / " % reduced_users, end='') 142 | comma = False 143 | days = 0 144 | for count in reduced_days_count: 145 | if count > 0: 146 | if days > 0: 147 | if not comma: 148 | comma = True 149 | else: 150 | print(", ", end='') 151 | print("%d*%d" % (count, days), end='') 152 | days += 1 153 | if num_old_android_apps > 0: 154 | print(" (%d old Android app(s))" % (num_old_android_apps // multiplier), end='') 155 | print() 156 | -------------------------------------------------------------------------------- /lib/count_users_v1_5.py: -------------------------------------------------------------------------------- 1 | # Count Users who reported keys using CWA 1.5ff 2 | # see https://github.com/mh-/diagnosis-keys/issues/12 3 | import math 4 | import sys 5 | from lib.conversions import get_datetime_from_utc_timestamp, get_timestamp_from_interval, tek_rolling_period 6 | 7 | # TRL Profiles: (0: today, 1: yesterday, ...) # why 15 values, not 14? 8 | trl_profiles = [[5, 6, 8, 8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1], # "classic" 9 | [5, 6, 7, 7, 7, 6, 4, 3, 2, 1, 1, 1, 1, 1, 1], # noInformation 10 | [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1], # nonSymptomatic 11 | [5, 6, 8, 8, 8, 7, 5, 3, 2, 1, 1, 1, 1, 1, 1], # symptomaticWithUnknownOnset 12 | [4, 5, 6, 7, 7, 7, 6, 5, 4, 3, 2, 1, 1, 1, 1], # lastSevenDays 13 | [1, 1, 1, 1, 2, 3, 4, 5, 6, 6, 7, 7, 6, 6, 4], # oneToTwoWeeksAgo 14 | [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 3, 4, 5]] # moreThanTwoWeeksAgo 15 | 16 | 17 | def count_users(diagnosis_key_list, padding_multiplier=5, auto_multiplier_detect=False): 18 | print("\nParsing the Diagnosis Key list...") 19 | original_len = len(diagnosis_key_list) 20 | if not auto_multiplier_detect: 21 | print("Length: %d keys (%d without padding)" % (original_len, original_len // padding_multiplier)) 22 | if len(diagnosis_key_list) % padding_multiplier != 0: 23 | print("WARNING: The number of keys is not a multiple of %d!" % padding_multiplier) 24 | print("See https://github.com/corona-warn-app/cwa-server/issues/693#issuecomment-672688610", 25 | "for a possible explanation.") 26 | else: 27 | print("Length: %d keys" % original_len) 28 | 29 | # find min and max start timestamp (interval) in the DK list 30 | min_interval = sys.maxsize 31 | max_interval = 0 32 | for dk in diagnosis_key_list: 33 | if min_interval > dk.start_interval: 34 | min_interval = dk.start_interval 35 | if max_interval < dk.start_interval: 36 | max_interval = dk.start_interval 37 | 38 | # create a dictionary for each day (also for days that might not have entries in the DK list) 39 | # key: start_interval, value: a list of 8 counters 40 | days_dict = dict() 41 | for interval in range(min_interval, max_interval+1, tek_rolling_period): 42 | days_dict[interval] = [0, 0, 0, 0, 0, 0, 0, 0] # number of entries for TRLs from 1 to 8 43 | 44 | # detect padding multiplier 45 | if auto_multiplier_detect: 46 | multiplier_candidate_table = [0, 0, 0, 0, 0] # 1, 2, 3, 4, 5 47 | 48 | # count number of TRLs for each day 49 | max_value = 0 50 | for dk in diagnosis_key_list: 51 | trl_nums = days_dict[dk.start_interval] 52 | value = trl_nums[dk.transmission_risk_level-1] + 1 53 | trl_nums[dk.transmission_risk_level-1] = value 54 | if max_value < value: 55 | max_value = value 56 | days_dict[dk.start_interval] = trl_nums 57 | 58 | # print number of TRL for each day 59 | max_value_width = len("{num}".format(num=max_value)) 60 | trl_sums = [0, 0, 0, 0, 0, 0, 0, 0] 61 | print("Number of keys per TRL:") 62 | print("Date: ", end='') 63 | for trl in range(8): 64 | print("{num:{width}}".format(num=trl+1, width=max_value_width + 3), end='') 65 | print(" Sum:") 66 | # for each day: 67 | max_row_sum = 0 68 | for key in sorted(days_dict.keys(), reverse=True): 69 | print(get_datetime_from_utc_timestamp(get_timestamp_from_interval(key)).strftime("%Y-%m-%d: "), end='') 70 | row_sum = 0 71 | trl = 0 72 | for trl_num in days_dict[key]: 73 | print("{num:{width}}".format(num=trl_num, width=max_value_width + 3), end='') 74 | row_sum += trl_num 75 | trl += 1 76 | trl_sums[trl-1] += trl_num 77 | # detect padding multiplier 78 | if auto_multiplier_detect: 79 | for candidate in range(len(multiplier_candidate_table), 0, -1): 80 | if trl_num % candidate == 0: 81 | multiplier_candidate_table[candidate-1] += 1 82 | break 83 | # print row sum: 84 | print(" {num:{width}}".format(num=row_sum, width=max_value_width + 2)) 85 | if max_row_sum < row_sum: 86 | max_row_sum = row_sum 87 | 88 | # print column sum: 89 | total = 0 90 | print("Total: ", end='') 91 | for row_sum in trl_sums: 92 | print("{num:{width}}".format(num=row_sum, width=max_value_width + 3), end='') 93 | total += row_sum 94 | print(" {num:{width}}".format(num=total, width=max_value_width + 2)) 95 | print() 96 | 97 | # find padding_multiplier 98 | if auto_multiplier_detect: 99 | max_value = max(multiplier_candidate_table) 100 | for candidate in range(len(multiplier_candidate_table), 0, -1): 101 | if multiplier_candidate_table[candidate-1] == max_value: 102 | padding_multiplier = candidate 103 | break 104 | print("Padding multiplier is probably: %d" % padding_multiplier) 105 | 106 | # print results: 107 | # column sum of TRL 6 108 | old_user_count = math.ceil(trl_sums[6-1] / padding_multiplier) 109 | # maximum row sum 110 | new_user_count = math.ceil(max_row_sum / padding_multiplier) 111 | print("Pre-V1.5 user count: %d" % old_user_count) 112 | print("Post-V1.5 user count: %d" % new_user_count) 113 | -------------------------------------------------------------------------------- /lib/crypto.py: -------------------------------------------------------------------------------- 1 | from Crypto.Protocol.KDF import HKDF 2 | from Crypto.Hash import SHA256 3 | from Crypto.Cipher import AES 4 | import struct 5 | 6 | interval_length_minutes = 10 7 | tek_rolling_period=144 8 | 9 | 10 | def en_interval_number(timestamp_seconds): 11 | return timestamp_seconds // (60 * interval_length_minutes) 12 | 13 | 14 | def encoded_en_interval_number(enin): 15 | return struct.pack("= 1, trl <= 8 55 | key.transmission_risk_level = trl 56 | assert start > 0 57 | key.rolling_start_interval_number = start 58 | assert duration <= 144 59 | key.rolling_period = duration 60 | assert report_type >= 0, report_type <= 5 61 | key.report_type = report_type 62 | -------------------------------------------------------------------------------- /lib/ramble_rpis.py: -------------------------------------------------------------------------------- 1 | import sqlite3 2 | from lib.conversions import get_datetime_from_utc_timestamp 3 | from lib.scanned_rpis import RPIEntry 4 | 5 | 6 | class RambleRPIs: 7 | 8 | __ramble_sql_script= \ 9 | """ 10 | SELECT 11 | locations.timestamp as 'timestamp_start', 12 | locations.timestamp as 'timestamp_end', 13 | devices.service_data as 'identifier', 14 | locations.rssi as 'rssi', 15 | devices.id as 'device_id', 16 | locations.latitude as 'lat', 17 | locations.longitude as 'long' 18 | FROM 19 | devices 20 | INNER JOIN locations ON devices.id = locations.device_id 21 | WHERE 22 | devices.service_data LIKE 'fd6f:%' 23 | ORDER BY 24 | devices.id, locations.timestamp; 25 | """ 26 | 27 | def __init__(self, file_name): 28 | self.rpis_dict = dict() 29 | with sqlite3.connect(file_name) as db_conn: 30 | rpi_reader = db_conn.execute(RambleRPIs.__ramble_sql_script) 31 | # StartTime, EndTime, RPI, AEM, MaxRSSI, BDADDR [, LAT, LON, Altitude, Speed] 32 | full_rpi_list = rpi_reader.fetchall() 33 | rpi_list = [] 34 | # get start and end date from multiple rows 35 | for c_row, row in enumerate(full_rpi_list): 36 | if (c_row > 0) and (row[4] == full_rpi_list[c_row-1][4]): 37 | rpi_list[-1][1] = row[1] # replace end date with later timestamp 38 | if rpi_list[-1][3] < row[3]: #replace stronger RSSI 39 | rpi_list[-1][3] = row[3] 40 | else: 41 | rpi_list.append(list(row)) # first entry for this ID, create it 42 | 43 | for row in rpi_list: 44 | rpi_value = row[2][5:37] 45 | aem_value = row[2][37:] 46 | rpi = RPIEntry(get_datetime_from_utc_timestamp(int(row[0])), 47 | get_datetime_from_utc_timestamp(int(row[1])), 48 | bytes.fromhex(rpi_value), bytes.fromhex(aem_value), 49 | int(row[3]), row[4], 50 | lat=row[5], lon=row[6]) 51 | 52 | if rpi.rpi in self.rpis_dict: 53 | existing_entries = self.rpis_dict[rpi.rpi] 54 | existing_entries.append(rpi) 55 | self.rpis_dict[rpi.rpi] = existing_entries 56 | else: 57 | self.rpis_dict[rpi.rpi] = [rpi] 58 | 59 | # print('Recorded %d unique RPIs' % len(self.rpis_dict)) -------------------------------------------------------------------------------- /lib/rpis_in_db.py: -------------------------------------------------------------------------------- 1 | import struct 2 | 3 | 4 | class RPIinLevelDB: 5 | def __init__(self, db): 6 | self.rpis_dict = dict() 7 | for key, value in db: 8 | # each "key" entry has 18 bytes: 2 bytes "day" and 16 bytes "rpi" 9 | day, rpi = struct.unpack(">H16s", key) 10 | self.rpis_dict[rpi] = day 11 | # print(self.rpis_dict) 12 | -------------------------------------------------------------------------------- /lib/scanned_rpis.py: -------------------------------------------------------------------------------- 1 | import csv 2 | from lib.conversions import * 3 | 4 | 5 | class RPIEntry: 6 | def __init__(self, start_time, end_time, rpi, aem, rssi, bdaddr, lat=None, lon=None, altitude=None, speed=None): 7 | self.start_time = start_time 8 | self.end_time = end_time 9 | self.rpi = rpi 10 | self.aem = aem 11 | self.rssi = rssi 12 | self.bdaddr = bdaddr 13 | self.lat = lat 14 | self.lon = lon 15 | self.altitude = altitude 16 | self.speed = speed 17 | 18 | 19 | class ScannedRPIs: 20 | def __init__(self, file_name): 21 | self.rpis_dict = dict() 22 | with open(file_name, newline='') as rpi_file: 23 | rpi_reader = csv.reader(rpi_file, delimiter=';') 24 | # StartTime, EndTime, RPI, AEM, MaxRSSI, BDADDR [, LAT, LON, Altitude, Speed] 25 | for row in rpi_reader: 26 | if row[0] == "StartTime": 27 | continue 28 | if len(row) == 6: 29 | rpi = RPIEntry(get_datetime_from_utc_timestamp(int(row[0])), 30 | get_datetime_from_utc_timestamp(int(row[1])), 31 | bytes.fromhex(row[2]), bytes.fromhex(row[3]), 32 | int(row[4]), row[5]) 33 | elif len(row) == 10: 34 | rpi = RPIEntry(get_datetime_from_utc_timestamp(int(row[0])), 35 | get_datetime_from_utc_timestamp(int(row[1])), 36 | bytes.fromhex(row[2]), bytes.fromhex(row[3]), 37 | int(row[4]), row[5], 38 | lat=row[6], lon=row[7], altitude=row[8], speed=row[9]) 39 | else: 40 | print("ERROR: %s must have only rows with 6 or 10 entries, found a row with %d entries" % 41 | (file_name, len(row))) 42 | exit(1) 43 | if rpi.rpi in self.rpis_dict: 44 | existing_entries = self.rpis_dict[rpi.rpi] 45 | existing_entries.append(rpi) 46 | self.rpis_dict[rpi.rpi] = existing_entries 47 | else: 48 | self.rpis_dict[rpi.rpi] = [rpi] 49 | # print(self.rpis_dict) 50 | -------------------------------------------------------------------------------- /parse_keys.py: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env python3 2 | 3 | from lib.diagnosis_keys import * 4 | from lib.scanned_rpis import * 5 | from lib.ramble_rpis import * 6 | from lib.rpis_in_db import * 7 | from lib.conversions import * 8 | from lib.crypto import * 9 | import argparse 10 | import plyvel 11 | import struct 12 | import lib.contact_records_pb2 13 | from lib.diagnosis_key import DiagnosisKey 14 | from lib.count_users import count_users 15 | 16 | parser = argparse.ArgumentParser(description="Exposure Notification Diagnosis Key Parser.", 17 | formatter_class=argparse.ArgumentDefaultsHelpFormatter) 18 | parser.add_argument("-d", "--diagnosiskeys", type=str, default="testExport-2-records-1-of-1.zip", 19 | help="file name of the Diagnosis Keys .zip file") 20 | parser.add_argument("-c", "--contactrecords", type=str, default="", 21 | help="directory name of a contact record LevelDB (e.g. app_contact-tracing-contact-record-db/)") 22 | parser.add_argument("-r", "--rpis", type=str, default="", 23 | help="file name of a Scanned RPIs .csv file") 24 | parser.add_argument("--ramble_rpis", type=str, default="", 25 | help="file name of a RamBLE sqlite file") 26 | parser.add_argument("-s", "--short", action="store_true", 27 | help="show only one scan per match") 28 | parser.add_argument("-l", "--localtime", action="store_true", 29 | help="display timestamps in local time (otherwise the default is UTC)") 30 | parser.add_argument("-u", "--usercount", action="store_true", 31 | help="count the number of users who submitted Diagnosis Keys") 32 | parser.add_argument("-m", "--multiplier", type=int, default=1, 33 | help="padding multiplier (RANDOM_KEY_PADDING_MULTIPLIER as set on cwa-server)") 34 | parser.add_argument("-a", "--auto-multiplier", action="store_true", 35 | help="automatically detect the multiplier (range 1..10)") 36 | parser.add_argument("-n", "--new-android-apps-only", action="store_true", 37 | help="assume that no 'old' Android apps uploaded keys") 38 | args = parser.parse_args() 39 | 40 | dk_file_name = args.diagnosiskeys 41 | rpi_file_name = args.rpis 42 | ramble_file_name = args.ramble_rpis 43 | read_rpi_file = (rpi_file_name != "") 44 | read_ramble_file = (ramble_file_name != "") 45 | contactrecord_dir_name = args.contactrecords 46 | read_contact_record_db = (contactrecord_dir_name != "") 47 | 48 | print("Exposure Notification Diagnosis Key Parser") 49 | print("This script parses published Diagnosis Keys.\n") 50 | # see https://github.com/google/exposure-notifications-server/tree/master/examples/export 51 | 52 | dk = DiagnosisKeys(dk_file_name) 53 | print("File '%s' read." % dk_file_name) 54 | 55 | contactrecord_db = None 56 | if read_contact_record_db: 57 | contactrecord_db = plyvel.DB(contactrecord_dir_name) 58 | rpis_in_db = RPIinLevelDB(contactrecord_db) 59 | 60 | scanned_rpis = None 61 | if read_rpi_file: 62 | scanned_rpis = ScannedRPIs(rpi_file_name) 63 | print("File '%s' read." % rpi_file_name) 64 | 65 | ramble_rpis = None 66 | if read_ramble_file: 67 | ramble_rpis = RambleRPIs(ramble_file_name) 68 | print("File '%s' read." % ramble_file_name) 69 | 70 | start_timestamp = dk.get_upload_start_timestamp() 71 | end_timestamp = dk.get_upload_end_timestamp() 72 | if args.localtime: 73 | start_timestamp = get_local_datetime(start_timestamp) 74 | end_timestamp = get_local_datetime(end_timestamp) 75 | print("- Time window: %s - %s" % (get_string_from_datetime(start_timestamp), 76 | get_string_from_datetime(end_timestamp))) 77 | print("- Region: %s" % dk.get_region()) 78 | print("- Batch: %d of %d" % (dk.get_batch_num(), dk.get_batch_size())) 79 | print("- # of keys in batch: %d" % len(dk.get_keys())) 80 | 81 | for signature_info in dk.get_signature_infos(): 82 | print("- Signature Info:") 83 | print(signature_info) 84 | 85 | dk_list = [] 86 | 87 | keys = None 88 | for i in [0, 1]: 89 | if i == 0: 90 | keys = dk.get_keys() 91 | print("Diagnosis Keys:") 92 | elif i == 1: 93 | keys = dk.get_revised_keys() 94 | print("\nRevised Diagnosis Keys:") 95 | if len(keys) == 0: 96 | print("(none)") 97 | i = 0 98 | for tek in keys: 99 | i += 1 100 | start_timestamp = get_datetime_from_utc_timestamp(get_timestamp_from_interval(tek.rolling_start_interval_number)) 101 | end_timestamp = get_datetime_from_utc_timestamp(get_timestamp_from_interval(tek.rolling_start_interval_number+tek.rolling_period)) 102 | if args.localtime: 103 | start_timestamp = get_local_datetime(start_timestamp) 104 | end_timestamp = get_local_datetime(end_timestamp) 105 | print("%3d: TEK: %s, Transmission Risk Level: %s, Validity: %s - %s (%d, %d)" % 106 | (i, tek.key_data.hex(), tek.transmission_risk_level, 107 | get_string_from_datetime(start_timestamp), 108 | get_string_from_datetime(end_timestamp), 109 | tek.rolling_start_interval_number, tek.rolling_period), 110 | end='') 111 | if tek.HasField("report_type"): 112 | field_types = ["UNKNOWN", "CONFIRMED_TEST", "CONFIRMED_CLINICAL_DIAGNOSIS", 113 | "SELF_REPORT", "RECURSIVE", "REVOKED"] 114 | print (", Report Type: %s" % field_types[tek.report_type], end='') 115 | if tek.HasField("days_since_onset_of_symptoms"): 116 | print (", Days since onset of symptoms: %d" % tek.days_since_onset_of_symptoms, end='') 117 | print() 118 | 119 | if read_contact_record_db: 120 | rpi_key = derive_rpi_key(tek.key_data) 121 | for diagnosis_rpi in create_list_of_rpis_for_interval_range(rpi_key, tek.rolling_start_interval_number, 122 | tek.rolling_period): 123 | if diagnosis_rpi in rpis_in_db.rpis_dict: 124 | print("FOUND MATCH!") 125 | aem_key = derive_aem_key(tek.key_data) 126 | interval = get_interval_number_from_rpi(diagnosis_rpi, rpi_key) 127 | interval_timestamp1 = get_datetime_from_utc_timestamp(get_timestamp_from_interval(interval)) 128 | interval_timestamp2 = get_datetime_from_utc_timestamp(get_timestamp_from_interval(interval+1)) 129 | if args.localtime: 130 | interval_timestamp1 = get_local_datetime(interval_timestamp1) 131 | interval_timestamp2 = get_local_datetime(interval_timestamp2) 132 | print("RPI Validity:", get_string_from_datetime(interval_timestamp1), 133 | "-", get_string_from_datetime(interval_timestamp2), 134 | "(Interval number: %d," % interval, 135 | "RPI: %s)" % diagnosis_rpi.hex()) 136 | 137 | aem_key = derive_aem_key(tek.key_data) 138 | day = rpis_in_db.rpis_dict[diagnosis_rpi] 139 | # each "key" entry in the LevelDB has 18 bytes: 2 bytes "day" and 16 bytes "rpi" 140 | dbkey = struct.pack(">H16s", day, diagnosis_rpi) 141 | dbvalue = contactrecord_db.get(dbkey) 142 | # each "value" entry is a ProtocolBuffer-encoded message, length at least 1 143 | contact_records = lib.contact_records_pb2.ContactRecords() 144 | contact_records.ParseFromString(dbvalue) 145 | for scanrecord in contact_records.scanrecord: 146 | metadata = decrypt_aem(aem_key, scanrecord.aem, diagnosis_rpi) 147 | if metadata[0] >= 0x40: 148 | tx_power = struct.unpack_from("b", metadata, 1)[0] # signed char 149 | else: 150 | tx_power = 0 151 | print("--> WARNING: Expected metadata to start with at least 0x40, so this could be a false positive!") 152 | 153 | sr_timestamp = get_datetime_from_utc_timestamp(scanrecord.timestamp) 154 | if args.localtime: 155 | sr_timestamp = get_local_datetime(sr_timestamp) 156 | attenuation = tx_power-scanrecord.rssi 157 | print(get_string_from_datetime(sr_timestamp), 158 | "Attenuation: %ddB" % attenuation, 159 | "(RSSI: %ddBm, AEM: %s, Metadata: % s)" % (scanrecord.rssi, scanrecord.aem.hex(), metadata.hex())) 160 | if args.short: 161 | print("(...)") 162 | break 163 | 164 | if read_rpi_file: 165 | for diagnosis_rpi in create_list_of_rpis_for_interval_range(derive_rpi_key(tek.key_data), 166 | tek.rolling_start_interval_number, tek.rolling_period): 167 | if diagnosis_rpi in scanned_rpis.rpis_dict: 168 | print("FOUND MATCH!") 169 | aem_key = derive_aem_key(tek.key_data) 170 | scanned_rpi_entries = scanned_rpis.rpis_dict[diagnosis_rpi] 171 | for scanned_rpi_entry in scanned_rpi_entries: 172 | metadata = decrypt_aem(aem_key, scanned_rpi_entry.aem, diagnosis_rpi) 173 | print("Timeframe: %s - %s (%d seconds), RSSI: %d dBm, LAT, LON, altitude, speed: %s, %s, %s, %s" % 174 | (get_string_from_datetime(get_local_datetime(scanned_rpi_entry.start_time)), 175 | get_string_from_datetime(get_local_datetime(scanned_rpi_entry.end_time)), 176 | (scanned_rpi_entry.end_time-scanned_rpi_entry.start_time).total_seconds(), 177 | scanned_rpi_entry.rssi, 178 | scanned_rpi_entry.lat, scanned_rpi_entry.lon, 179 | scanned_rpi_entry.altitude, scanned_rpi_entry.speed)) 180 | print("Decrypted metadata: %s " % metadata.hex(), end='') 181 | if metadata[0] == 0x40: 182 | tx_power = struct.unpack_from("b", metadata, 1)[0] # signed char 183 | print("--> TX Power: %d dBm --> RF attenuation: %d dB" % 184 | (tx_power, tx_power-scanned_rpi_entry.rssi), end='') 185 | else: 186 | print("--> WARNING: Expected metadata to start with 40, so this could be a false positive!") 187 | print() 188 | if args.short: 189 | print("(...)") 190 | break 191 | 192 | if read_ramble_file: 193 | for diagnosis_rpi in create_list_of_rpis_for_interval_range(derive_rpi_key(tek.key_data), 194 | tek.rolling_start_interval_number, tek.rolling_period): 195 | if diagnosis_rpi in ramble_rpis.rpis_dict: 196 | print("FOUND MATCH!") 197 | aem_key = derive_aem_key(tek.key_data) 198 | ramble_rpi_entries = ramble_rpis.rpis_dict[diagnosis_rpi] 199 | for ramble_rpi_entry in ramble_rpi_entries: 200 | metadata = decrypt_aem(aem_key, ramble_rpi_entry.aem, diagnosis_rpi) 201 | print("Timeframe: %s - %s (%d seconds), RSSI: %d dBm, LAT, LON, altitude, speed: %s, %s, %s, %s" % 202 | (get_string_from_datetime(get_local_datetime(ramble_rpi_entry.start_time)), 203 | get_string_from_datetime(get_local_datetime(ramble_rpi_entry.end_time)), 204 | (ramble_rpi_entry.end_time-ramble_rpi_entry.start_time).total_seconds(), 205 | ramble_rpi_entry.rssi, 206 | ramble_rpi_entry.lat, ramble_rpi_entry.lon, 207 | ramble_rpi_entry.altitude, ramble_rpi_entry.speed)) 208 | print("Decrypted metadata: %s " % metadata.hex(), end='') 209 | if metadata[0] == 0x40: 210 | tx_power = struct.unpack_from("b", metadata, 1)[0] # signed char 211 | print("--> TX Power: %d dBm --> RF attenuation: %d dB" % 212 | (tx_power, tx_power-ramble_rpi_entry.rssi), end='') 213 | else: 214 | print("--> WARNING: Expected metadata to start with 40, so this could be a false positive!") 215 | print() 216 | if args.short: 217 | print("(...)") 218 | break 219 | 220 | if args.usercount: 221 | dk_list.append(DiagnosisKey(tek.key_data, tek.rolling_start_interval_number, tek.rolling_period, tek.transmission_risk_level)) 222 | 223 | if read_contact_record_db: 224 | contactrecord_db.close() 225 | 226 | if args.usercount: 227 | count_users(dk_list, multiplier = args.multiplier, auto_multiplier_detect = args.auto_multiplier, 228 | new_android_apps_only = args.new_android_apps_only) 229 | -------------------------------------------------------------------------------- /parse_keys_json.py: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env python3 2 | from lib.diagnosis_keys import * 3 | from lib.conversions import * 4 | import argparse 5 | import struct 6 | from lib.count_users import count_users 7 | import json 8 | 9 | parser = argparse.ArgumentParser(description="Exposure Notification Diagnosis Key Parser.", formatter_class=argparse.ArgumentDefaultsHelpFormatter) 10 | parser.add_argument("-d", "--diagnosiskeys", type=str, default="testExport-2-records-1-of-1.zip", help="file name of the Diagnosis Keys .zip file") 11 | parser.add_argument("-l", "--localtime", action="store_true", help="display timestamps in local time (otherwise the default is UTC)") 12 | args = parser.parse_args() 13 | 14 | dk_file_name = args.diagnosiskeys 15 | dk = DiagnosisKeys(dk_file_name) 16 | 17 | json_obj = dict() 18 | 19 | start_timestamp = dk.get_upload_start_timestamp() 20 | end_timestamp = dk.get_upload_end_timestamp() 21 | if args.localtime: 22 | start_timestamp = get_local_datetime(start_timestamp) 23 | end_timestamp = get_local_datetime(end_timestamp) 24 | 25 | json_obj["timeWindowStart"] = get_string_from_datetime(start_timestamp) 26 | json_obj["timeWindowEnd"] = get_string_from_datetime(end_timestamp) 27 | json_obj["region"] = dk.get_region() 28 | json_obj["batchNum"] = dk.get_batch_num() 29 | json_obj["batchCount"] = dk.get_batch_size() 30 | json_obj["keyCount"] = len(dk.get_keys()) 31 | 32 | json_obj["signatureInfos"] = dict() 33 | for signature_info in dk.get_signature_infos(): 34 | for line in str(signature_info).split("\n"): 35 | line = line.strip() 36 | if line: 37 | json_obj["signatureInfos"][line.split(":")[0]] = line.split(":")[1].replace('"', "").strip() 38 | 39 | json_obj["diagnosisKeys"] = [] 40 | i = 0 41 | for tek in dk.get_keys(): 42 | i += 1 43 | start_timestamp = get_datetime_from_utc_timestamp(get_timestamp_from_interval(tek.rolling_start_interval_number)) 44 | end_timestamp = get_datetime_from_utc_timestamp(get_timestamp_from_interval(tek.rolling_start_interval_number + tek.rolling_period)) 45 | if args.localtime: 46 | start_timestamp = get_local_datetime(start_timestamp) 47 | end_timestamp = get_local_datetime(end_timestamp) 48 | key = dict() 49 | key["TemporaryExposureKey"] = tek.key_data.hex() 50 | key["transmissionRiskLevel"] = tek.transmission_risk_level 51 | key["validity"] = dict() 52 | key["validity"]["start"] = get_string_from_datetime(start_timestamp) 53 | key["validity"]["end"] = get_string_from_datetime(end_timestamp) 54 | key["validity"]["rollingStartIntervalNumber"] = tek.rolling_start_interval_number 55 | key["validity"]["rollingPeriod"] = tek.rolling_period 56 | json_obj["diagnosisKeys"].append(key) 57 | 58 | print(json.dumps(json_obj, indent=2)) 59 | -------------------------------------------------------------------------------- /requirements.txt: -------------------------------------------------------------------------------- 1 | pycryptodome 2 | protobuf 3 | plyvel 4 | --------------------------------------------------------------------------------