Android security internals: an in-depth guide to Android's security architecture
Saved in:
| Main Author: | |
|---|---|
| Format: | Book |
| Language: | English |
| Published: |
San Francisco, Calif.
No Starch Press
2015
|
| Edition: | 1. print. |
| Subjects: | |
| Online Access: | Inhaltsverzeichnis |
| Item Description: | Hier auch später erschienene, unveränderte Nachdrucke |
| Physical Description: | XXV, 401 Seiten Illustrationen, Diagramme |
| ISBN: | 9781593275815 1593275811 |
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MARC
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| 245 | 1 | 0 | |a Android security internals |b an in-depth guide to Android's security architecture |c by Nikolay Elenkov |
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Record in the Search Index
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| adam_text | CONTENTS IN DETAIL
FOREWORD by ion Sawyer xvii
ACKNOWLEDGMENTS xix
INTRODUCTION xxi
Who This Book Is For......................................................xxii
Prerequisites............................................................xxiii
Android Versions.........................................................xxiii
How Is This Book Organized?...............................................xxiv
Conventions................................................................xxv
1
ANDROID S SECURITY MODEL 1
Android s Architecture............................................................. 1
Linux Kernel..............................................................2
Native Userspace..........................................................2
Dalvik VM.................................................................3
Java Runtime Libraries....................................................4
System Services...........................................................4
Inter-Process Communication...............................................4
Binder....................................................................5
Android Framework Libraries............................................. 10
Applications............................................................ 10
Android s Security Model.......................................................... 12
Application Sandboxing.................................................. 12
Permissions............................................................. 14
IPC..................................................................... 15
Code Signing and Platform Keys.......................................... 16
Multi-User Support...................................................... 16
SELinux................................................................. 17
System Updates.......................................................... 17
Verified Boot........................................................... 18
Summary........................................................................... 19
2
PERMISSIONS 21
The Nature of Permissions..........................................................21
Requesting Permissions.............................................................23
Permission Management..............................................................23
Permission Protection Levels.......................................................24
Permission Assignment..............................................................26
Permission Enforcement............................................................30
Kernel-Level Enforcement................................................30
Native Daemon-Level Enforcement.........................................31
Framework-Level Enforcement.............................................33
System Permissions................................................................37
Signature Permissions...................................................39
Development Permissions.................................................39
Shared User ID....................................................................40
Custom Permissions................................................................42
Public and Private Components.....................................................43
Activity and Service Permissions..................................................44
Broadcast Permissions.............................................................45
Content Provider Permissions......................................................46
Static Provider Permissions.............................................46
Dynamic Provider Permissions............................................47
Pending Intents...................................................................49
Summary...........................................................................50
3
PACKAGE MANAGEMENT 51
Android Application Package Format................................................51
Code Signing......................................................................53
Java Code Signing.......................................................53
Android Code Signing....................................................59
APK Install Process...............................................................61
Location of Application Packages and Data...............................62
Active Components.......................................................63
Installing a Local Package..............................................66
Updating a Package......................................................72
Installing Encrypted APKs...............................................76
Forward Locking.........................................................79
Android 4.1 Forward Locking Implementation..............................80
Encrypted Apps and Google Play..........................................82
Package Verification..............................................................83
Android Support for Package Verification................................84
Google Play Implementation..............................................85
Summary...........................................................................86
4
USER MANAGEMENT 87
Multi-User Support Overview.......................................................87
Types of Users....................................................................90
The Primary User (Owner)................................................90
Secondary Users.........................................................91
Restricted Profiles.....................................................92
Guest User..............................................................94
User Management..........................
Command-Line Tools.............
User States and Related Broadcasts
User Metadata............................
The User List File.............
User Metadata Files............
User System Directory..........
Per-User Application Management..........
Application Data Directories...
Application Sharing............
External Storage.........................
External Storage Implementations .
Multi-User External Storage....
External Storage Permissions ....
Other Multi-User Features................
Summary..................................
5
CRYPTOGRAPHIC PROVIDERS
JCA Provider Architecture................
Cryptographic Service Providers. . ,
JCA Engine Classes.......................
Obtaining an Engine Class Instance
Algorithm Names................
SecureRandom...................
MessageDigest..................
Signature......................
Cipher.........................
Mac............................
Key................................................................... 128
SecretKey and PBEKey.................................................. 128
PublicKey, PrivateKey, and KeyPair.................................... 129
KeySpec............................................................... 129
KeyFactory............................................................ 129
SecretKey Factory..................................................... 130
KeyPa i rGenerator.................................................... 131
KeyGenerator.......................................................... 131
KeyAgreement.......................................................... 132
KeyStore.............................................................. 133
CertificateFactory and CertPath....................................... 135
CertPathValidator and CertPathBuilder................................. 136
Android JCA Providers........................................................... 137
Harmony s Crypto Provider............................................. 137
Android s Bouncy Castle Provider...................................... 137
AndroidOpenSSL Provider............................................... 140
OpenSSL................................................................142
Using a Custom Provider......................................................... 142
Spongy Castle......................................................... 143
Summary......................................................................... 144
95
95
95
96
96
97
99
99
100
101
104
104
105
111
112
113
115
116
116
119
119
120
120
121
122
123
6
NETWORK SECURITY AND PKI 145
PKi and SSL Overview.............................................................. 146
Public Key Certificates................................................. 146
Direct Trust and Private CAs............................................ 148
Public Key Infrastructure............................................... 148
Certificate Revocation.................................................. 150
JSSE Introduction................................................................ 151
Secure Sockets.......................................................... 152
Peer Authentication..................................................... 152
Hostname Verification................................................... 154
Android JSSE Implementation....................................................... 155
Certificate Management and Validation................................... 156
Certificate Blacklisting................................................ 162
Reexamining the PKI Trust Model......................................... 166
Summary........................................................................... 170
7
CREDENTIAL STORAGE 171
VPN and Wi-Fi EAP Credentials..................................................... 172
Authentication Keys and Certificates.................................... 172
The System Credential Store............................................. 173
Credential Storage Implementation................................................. 174
The keystore Service.................................................... 174
Key Blob Versions and Types............................................. 176
Access Restrictions..................................................... 176
keymaster Module and keystore Service Implementation.................... 176
Nexus 4 Hardware-Backed Implementation.................................. 178
Framework Integration....................................................180
Public APIs....................................................................... 181
The KeyChain API........................................................ 181
KeyChain API Implementation............................................. 185
Controlling Access to the Keystore...................................... 186
Android Keystore Provider............................................. 188
Summary........................................................................... 189
8
ONLINE ACCOUNT MANAGEMENT 191
Android Account Management Overview............................................... 192
Account Management Implementation................................................. 192
AccountManagerService and AccountManager................................ 193
Authenticator Modules................................................... 194
The Authenticator Module Cache.......................................... 194
AccountManagerService Operations and Permissions........................ 195
The Accounts Database................................................... 198
Multi-User Support.......................................................201
Adding an Authenticator Module...........................................203
Google Accounts Support..................................
The Google Login Service.......................
Google Services Authentication and Authorization
Google Play Services...........................
Summary..................................................
206
206
209
211
213
ENTERPRISE SECURITY 215
Device Administration..............................................................216
Implementation...........................................................217
Adding a Device Administrator............................................223
Enterprise Account Integration...........................................226
VPN Support........................................................................229
PPTP.....................................................................229
L2TP/IPSec...............................................................229
IPSec Xauth..............................................................230
SSL-Based VPNs...........................................................230
Legacy VPN...............................................................231
Application-Based VPNs...................................................236
Multi-User Support.......................................................239
Wi-Fi EAP..........................................................................242
EAP Authentication Methods...............................................243
Android Wi-Fi Architecture...............................................244
EAP Credentials Management...............................................245
Adding an EAP Network with WifiManager...................................248
Summary............................................................................250
10
DEVICE SECURITY 251
Controlling OS Boot-Up and Installation..............................................252
Bootloader.................................................................252
Recovery...................................................................253
Verified Boot........................................................................254
dm-verity Overview.........................................................254
Android Implementation.....................................................255
Enabling Verified Boot.....................................................256
Disk Encryption......................................................................258
Cipher Mode................................................................259
Key Derivation.............................................................260
Disk Encryption Password...................................................261
Changing the Disk Encryption Password......................................262
Enabling Encryption........................................................263
Booting an Encrypted Device................................................265
Screen Security......................................................................268
Lockscreen Implementation..................................................268
Keyguard Unlock Methods....................................................269
Brute-Force Attack Protection..............................................276
Secure USB Debugging..............................................................277
ADB Overview............................................................277
The Need for Secure ADB.................................................279
Securing ADB............................................................280
Secure ADB Implementation...............................................281
ADB Authentication Keys.................................................282
Verifying the Host Key Fingerprint......................................282
Android Backup....................................................................283
Android Backup Overview.................................................283
Backup File Format......................................................284
Backup Encryption.......................................................286
Controlling Backup Scope................................................287
Summary...........................................................................288
11
NFC AND SECURE ELEMENTS 289
NFC Overview......................................................................289
Android NFC Support...............................................................290
Reader/Writer Mode......................................................290
Peer-to-Peer Mode.......................................................294
Card Emulation Mode.....................................................295
Secure Elements...................................................................295
SE Form Factors in Mobile Devices.......................................296
Accessing the Embedded SE...............................................299
Android SE Execution Environment........................................302
UICC as a Secure Element................................................305
Software Card Emulation...........................................................310
Android 4.4 HCE Architecture............................................310
APDU Routing............................................................311
Writing an HCE Service..................................................315
Security of HCE Applications............................................317
Summary...........................................................................318
12
SELINUX 319
SELinux Introduction..............................................................320
SELinux Architecture....................................................320
Mandatory Access Control................................................321
SELinux Modes...........................................................322
Security Contexts.......................................................322
Security Context Assignment and Persistence.............................324
Security Policy.........................................................324
Policy Statements.......................................................324
Type Transition Rules...................................................327
Domain Transition Rules.................................................328
Access Vector Rules.....................................................329
Android Implementation............................................................330
Kernel Changes..........................................................331
Userspace Changes.......................................................332
Device Policy Files.....................................................339
Policy Event Logging....................................................340
Android 4.4 SELinux Policy. . .
Policy Overview . . .
Enforcing Domains .
Unconfined Domains
App Domains......
Summary...................
340
341
342
344
345
347
SYSTEM UPDATES AND ROOT ACCESS 349
Bootloader.......................................................................350
Unlocking the Bootloader...............................................350
Fastboot Mode..........................................................352
Recovery.........................................................................354
Stock Recovery.........................................................354
Custom Recoveries......................................................363
Root Access......................................................................364
Root Access on Engineering Builds......................................365
Root Access on Production Builds.................................................368
Rooting by Changing the boot or system Image...........................369
Rooting by Flashing an OTA Package ....................................370
Rooting via Exploits...................................................375
Summary..........................................................................376
INDEX
377
|
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| author | Elenkov, Nikolay |
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| bvnumber | BV042212361 |
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| discipline | Informatik |
| edition | 1. print. |
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| id | DE-604.BV042212361 |
| illustrated | Illustrated |
| indexdate | 2024-07-10T01:15:26Z |
| institution | BVB |
| isbn | 9781593275815 1593275811 |
| language | English |
| lccn | 2014952666 |
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| physical | XXV, 401 Seiten Illustrationen, Diagramme |
| publishDate | 2015 |
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| spelling | Elenkov, Nikolay Verfasser (DE-588)1065462522 aut Android security internals an in-depth guide to Android's security architecture by Nikolay Elenkov 1. print. San Francisco, Calif. No Starch Press 2015 XXV, 401 Seiten Illustrationen, Diagramme txt rdacontent n rdamedia nc rdacarrier Hier auch später erschienene, unveränderte Nachdrucke Computers Security Android 4.4 (DE-588)1046441892 gnd rswk-swf Computersicherheit (DE-588)4274324-2 gnd rswk-swf Java Programmiersprache (DE-588)4401313-9 gnd rswk-swf Programmierung (DE-588)4076370-5 gnd rswk-swf Android Systemplattform (DE-588)7635475-1 gnd rswk-swf Android Systemplattform (DE-588)7635475-1 s Android 4.4 (DE-588)1046441892 s Programmierung (DE-588)4076370-5 s Java Programmiersprache (DE-588)4401313-9 s Computersicherheit (DE-588)4274324-2 s DE-604 Digitalisierung UB Passau - ADAM Catalogue Enrichment application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=027651018&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Elenkov, Nikolay Android security internals an in-depth guide to Android's security architecture Computers Security Android 4.4 (DE-588)1046441892 gnd Computersicherheit (DE-588)4274324-2 gnd Java Programmiersprache (DE-588)4401313-9 gnd Programmierung (DE-588)4076370-5 gnd Android Systemplattform (DE-588)7635475-1 gnd |
| subject_GND | (DE-588)1046441892 (DE-588)4274324-2 (DE-588)4401313-9 (DE-588)4076370-5 (DE-588)7635475-1 |
| title | Android security internals an in-depth guide to Android's security architecture |
| title_auth | Android security internals an in-depth guide to Android's security architecture |
| title_exact_search | Android security internals an in-depth guide to Android's security architecture |
| title_full | Android security internals an in-depth guide to Android's security architecture by Nikolay Elenkov |
| title_fullStr | Android security internals an in-depth guide to Android's security architecture by Nikolay Elenkov |
| title_full_unstemmed | Android security internals an in-depth guide to Android's security architecture by Nikolay Elenkov |
| title_short | Android security internals |
| title_sort | android security internals an in depth guide to android s security architecture |
| title_sub | an in-depth guide to Android's security architecture |
| topic | Computers Security Android 4.4 (DE-588)1046441892 gnd Computersicherheit (DE-588)4274324-2 gnd Java Programmiersprache (DE-588)4401313-9 gnd Programmierung (DE-588)4076370-5 gnd Android Systemplattform (DE-588)7635475-1 gnd |
| topic_facet | Computers Security Android 4.4 Computersicherheit Java Programmiersprache Programmierung Android Systemplattform |
| url | http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=027651018&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
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