Knock! Knock! Who's There?

Transcript

1. Snakeoil Academy 2021 • PyCon AU • @m_holtermann Knock! Knock!

   Who’s There?

2. Snakeoil Academy 2021 • PyCon AU • @m_holtermann Hi, I’m

   Markus Holtermann

3. Snakeoil Academy 2021 • PyCon AU • @m_holtermann Hi, I’m

   Markus Holtermann W e're hiring

4. Snakeoil Academy 2021 • PyCon AU • @m_holtermann The Beginning

5. Snakeoil Academy 2021 • PyCon AU • @m_holtermann Marian Vanhaeren/Francesco

   d'Errico

6. Snakeoil Academy 2021 • PyCon AU • @m_holtermann Sketch by

   Sydney Parkinson (1784) Portrait by Louis John Steele (1891)

7. Snakeoil Academy 2021 • PyCon AU • @m_holtermann

8. Snakeoil Academy 2021 • PyCon AU • @m_holtermann

9. Snakeoil Academy 2021 • PyCon AU • @m_holtermann Snakeoil Academy

   2021 • PyCon AU • @m_holtermann # scrypt >>> import base64, hashlib, secrets >>> salt = secrets.token_bytes(16) >>> password = b"my p4ssw0rd!"0 >>> hash = hashlib.scrypt(password, salt=salt, n=2**14, r=8, p=1, maxmem=0, dklen=64).hex() >>> base64.b64encode(hash).decode('ascii').strip() '8ln2EySYjOZRSLaIzjvaOaQQfGshxdH7vxptMyWo9zWJbM1glu0K8LbZf56QH+GefdiCP079IErDhVw UmPsRzQ==' # argon2 >>> from argon2 import PasswordHasher >>> hasher = PasswordHasher() >>> hasher.hash(password) '$argon2id$v=19$m=102400,t=2,p=8$d85wm2Zga0oSPiK6Uxm4zA$03Kc+n7lf3SpL+VYSbMnfA'

10. Snakeoil Academy 2021 • PyCon AU • @m_holtermann Basic &

    Digest Authentication RFC 2069, RFC 2617, RFC 7617

11. Snakeoil Academy 2021 • PyCon AU • @m_holtermann Snakeoil Academy

    2021 • PyCon AU • @m_holtermann WWW-Authenticate: Basic realm="PyConAU 2021", charset="UTF-8" Authorization: Basic Y3VybHlib2k6c25ha2VvaWwuYWNhZGVteQ== Server replies with: Client sends:

12. Snakeoil Academy 2021 • PyCon AU • @m_holtermann Token Authentication

    Authorization: Token soM3r4nDOmByt3s

13. Snakeoil Academy 2021 • PyCon AU • @m_holtermann Bearer Authentication

    RFC 6750 Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIy MDIxIiwibmFtZSI6ImN1cmx5Ym9pIn0.W8-ixoAkGMe5Gs7c5 DLXFO0fCLypn2xhNExulY5iSEY

14. Snakeoil Academy 2021 • PyCon AU • @m_holtermann JWT https://groups.google.com/g/django-developers

    /c/6oS9R2GwO4k/m/Rep92xfsAwAJ

15. Snakeoil Academy 2021 • PyCon AU • @m_holtermann JWT

16. Snakeoil Academy 2021 • PyCon AU • @m_holtermann Snakeoil Academy

    2021 • PyCon AU • @m_holtermann >>> import base64, json, hmac >>> key = b"snakeoil.academy" >>> data = {"uid": 123, "name": "curlyboi"} >>> payload = base64.b64encode(json.dumps(data).encode()) >>> mac = hmac.new(key, payload, digestmod="sha256") >>> payload + b"." + base64.b64encode(mac.digest()) >>> ret b'eyJ1aWQiOiAxMjMsICJuYW1lIjogImN1cmx5Ym9pIn0=.oJPUWmHZGJIXPCna082U8/SMseX+hZ5av Kjgt1TKovg=' >>> signed, signature = ret.split(b".", 1) >>> hmac.compare_digest(signature, ... base64.b64encode(hmac.new(key, signed, digestmod="sha256").digest())) True >>> json.loads(base64.b64decode(signed)) {'uid': 123, 'name': 'curlyboi'}

17. Snakeoil Academy 2021 • PyCon AU • @m_holtermann Mutual Authentication

18. Snakeoil Academy 2021 • PyCon AU • @m_holtermann FIDO2 /

    WebAuthn https://www.w3.org/TR/webauthn-2/

19. Snakeoil Academy 2021 • PyCon AU • @m_holtermann Snakeoil Academy

    2021 • PyCon AU • @m_holtermann

20. Snakeoil Academy 2021 • PyCon AU • @m_holtermann I! I

    who? Identification and Authentication!

21. Snakeoil Academy 2021 • PyCon AU • @m_holtermann Thank you!

22. Snakeoil Academy 2021 • PyCon AU • @m_holtermann Sources •

    https://www.newscientist.com/article/dn9392-ancient-beads-imply-culture-older-than-we-thought/ • https://rss.onlinelibrary.wiley.com/doi/pdf/10.1111/j.1740-9713.2013.00706.x • https://www.smithsonianmag.com/history/tattoos-144038580/ • https://www.trulioo.com/blog/infographic-the-history-of-id-verification • https://github.blog/2021-04-05-behind-githubs-new-authentication-token-formats/