Kerberos認証について理解を深める

『Kerberos認証について理解を深める』勉強会用スライド。※本資料に記述された見解は私個人の見解であり、所属する会社＆組織の見解を必ずしも反映したものではありません。ご了承ください。

1. 2020/07/27 Enterprise Account 3 Associate Consultant Active Directoryで学ぶKerberos認証
2. Kerberos
3. Appendix 1. Kerberos Windows Active Directory 1. 2. Windows Active Directory 1. 2. 3. 4. 5. 6. OU(Organizational Unit) 7. 2. Kerberos 1. Kerberos 2. 3. 4. 1. 1. 2. 2. Kerberos 1. P2P 2. 3. Kerberos 1. 2. Kerberos 4. Kerberos Windows Active Directory 5. Agenda
4. 1. (Authentication) • • • Verifying the identity of a user, process, or device, often as a prerequisite to allowing access to resources in an information system.(*) (Authorization) • • The right or a permission that is granted to a system entity to access a system resource.(*) (*) HP https://csrc.nist.gov/glossary/term/authorization
5. 1 1. WHAT YOU ARE (inherence factor) • • 2. WHAT YOU HAVE (possession factor) • • 3. WHAT YOU KNOW (knowledge factor) • • 3 1.
6. 1. B A B A A B A
7. 1 1 2. Kerberos Kerberos RADIUS …
8. P2P 2. Kerberos P2P C D B A C D B A B BBB111 C CCC111 D DDD111 Alemopida232 A AAA222 B BBB222 D DDD223 Koud2341 A AAA112 C CCC114 D DDD112 Se329 A AAA112 B BBB928 C CCC722 ServPass A AAA112 B BBB114 C CCC112 D DDD A AAA111 B BBB222 C CCC333 D DDD444
9. 2. Kerberos C D B A C D B A
10. 3. Kerberos Key Distribution Center(KDC) Key Distribution Center(KDC) Client A Authentication Service (AS) Ticket Granting Service (TGS) TGS AS https://www.tv-asahi.co.jp/doraemon/cast/ Client Realm B A B
11. Kerberos - AS Client 3. Kerberos Key Distribution Center(KDC) Key Distribution Center(KDC) Client A Authentication Service (AS) Ticket Granting Service (TGS) https://www.tv-asahi.co.jp/doraemon/cast/ Realm B
12. Kerberos - AS Client ( ) 3. Kerberos Key Distribution Center(KDC) Key Distribution Center(KDC) Client A Authentication Service (AS) Ticket Granting Service (TGS) https://www.tv-asahi.co.jp/doraemon/cast/ Realm B ( ) ( )
13. Kerberos - AS Client (2 ) 3. Kerberos Key Distribution Center(KDC) Key Distribution Center(KDC) Client A Authentication Service (AS) Ticket Granting Service (TGS) https://www.tv-asahi.co.jp/doraemon/cast/ Realm B ID ⇒ ( )
14. Principal 3. Kerberos Key Distribution Center(KDC) Key Distribution Center(KDC) Client A Authentication Service (AS) Ticket Granting Service (TGS) Realm B KDC Principal KDC KDC Principal
15. 3. Kerberos Client Authentication Service (AS) Ticket Granting Service (TGS) A
16. – ( Realm ) 3. Kerberos Key Distribution Center(KDC) Key Distribution Center(KDC) Client Authentication Service (AS) Ticket Granting Service (TGS) ID TGT A A ID ID K A B TGT TGT ( ) K TGT ( ) TGT Token ( ) Token ( ) TGT ID/ TGT
17. – 2 ( Realm B ) 3. Kerberos Key Distribution Center(KDC) Key Distribution Center(KDC) Client Authentication Service (AS) Ticket Granting Service (TGS) B B ID A B AS TGT ( ) Token ( ) Token ( ) TGT TGT
18. Kerberos Windows Active Directory 4. Kerberos Windows Active Directory Microsoft Windows 2000 Active Directory Domain Services Active Directory Lightweight Directory Services Active Directory Certificate Services Active Directory Rights Management Services Active Directory Federation Services
19. Windows Active Directory Kerberos 3 5. Kerberos RADIUS …
20. Kerberos: The Definitive Guide Jason Garman , (O’Reilly) Active Directory Windows Server 2019 Inc. Yokota Lab ( BP) Web https://www.atmarkit.co.jp/ait/articles/1407/04/news012.html https://www.itmedia.co.jp/help/howto/win/win2000/0007trust/01/07.html https://qiita.com/yagiaoskywalker/items/4d3c1c682aba29f89056
22. Appendix
23. Active Directory Domain Services 1. Kerberos Windows Active Directory TLD DNS . com kohei tokyo tokyo.kohei.com kohei.com taro taro.local Sales OU ACC OU . com kohei osaka (DC) DC DC DC DC DC jp
24. (Kerberos Realm ) Active Directory Domain Service(AD DS) 1. Kerberos Windows Active Directory TLD DNS . com jp kohei japan DNS kohei.com Active Directory kohei.com DNS japan.kohei.com Active Directory japan.kohei.com
25. (Kerberos KDC ) 1. Kerberos Windows Active Directory DC DB DC DB DC DB DB
26. Active Directory 1. Kerberos Windows Active Directory kohei japan us sales hr sales hr Active Directory kohei.local japan.kohei.local us.kohei.local sales.japan.kohei.local hr.japan.kohei.local sales.us.kohei.local hr.us.kohei.local
27. 1. Kerberos Windows Active Directory kohei japan taro Active Directory kohei.local japan.kohei.local taro.local sales sales.taro.local sales hr sales.japan.kohei.local hr.japan.kohei.local
28. Kerberos 1. Kerberos Windows Active Directory kohei japan taro taro.local sales sales.taro.local sales sales.japan.kohei.local sale.japan.kohei.local sales.taro.local
29. OU(Organizational Unit) Active Directory 1. Kerberos Windows Active Directory Active Directory kohei.local Sales OU ACC OU
30. 1. Kerberos Windows Active Directory 15 1 3 1
31. Kerberos 2. Kerberos
32. ID/Password Keycloak 2. Kerberos Key Distribution Center(KDC) Key Distribution Center(KDC) Client Authentication Service (AS) Ticket Granting Service (TGS) B B ID/Password ID K AD ) Keycloak TGT /TGS TGT /TGS OCI GC3 5days
33. 2. Kerberos
34. Keycloak ID/Password 2. Kerberos