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cmuratori's profile
Casey Muratori
Casey Muratori
Casey Muratori
@cmuratori

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Casey Muratori

@cmuratori

I'm worried that the baby thinks people can't change.

Seattle
caseymuratori.com
Joined March 2009

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    1. Casey Muratori‏ @cmuratori Sep 2

      I don't normally do "web programming", but now that I have to do some of it, I have to ask: how did this end up being the security standard? (OAuth 2.0, example from PayPal's API)pic.twitter.com/nHXqajAiej

      11 replies 1 retweet 72 likes
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    2. Casey Muratori‏ @cmuratori Sep 2

      It seems to me that even a cursory look at such a security model lets you know that it is not good? Because the credentials are passed directly. This means that any breach anywhere in the entire chain from the storage to the remote endpoint leaks complete authority?

      3 replies 0 retweets 21 likes
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      Casey Muratori‏ @cmuratori Sep 2

      If instead you passed merely a signature of the request signed using the secret, then any breach leaks only the specific token, and not the entire client authority.

      1:39 AM - 2 Sep 2021
      • 24 Likes
      • Lambda boi Rytis Tormod 32th System Caden Parker BlueGhost 🌐 Trystan Brock Hasen Judy حسن الجودي Vinícius Souza
      7 replies 0 retweets 24 likes
        1. New conversation
        2. Casey Muratori‏ @cmuratori Sep 2

          This is actually a non-trivial difference, unless I am missing something. For example, you could put the signing in a secure enclave, and then it would be protected, and still fast since only the signing must operate securely.

          2 replies 0 retweets 14 likes
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        3. Casey Muratori‏ @cmuratori Sep 2

          But with the OAuth model, you would have to put the entire application in a secure enclave, from the storage right on down to the part where the HTTPS packet gets encoded, which seems terrible for performance.

          5 replies 0 retweets 11 likes
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        4. Casey Muratori‏ @cmuratori Sep 2

          Anyway, just thought I'd mention it. If I were designing something doing financial transactions (@paypal, @stripe, etc.), I would have been very nervous about this, but apparently that was not the case?

          5 replies 0 retweets 17 likes
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        5. End of conversation
        1. New conversation
        2. Pavel Djundik‏ @thexpaw Sep 2
          Replying to @cmuratori

          What do you think about using TLS client certificates for this purpose?

          1 reply 0 retweets 0 likes
        3. Casey Muratori‏ @cmuratori Sep 2
          Replying to @thexpaw

          I'd have to see the specifics but at least in theory I feel like that would have been a much better idea.

          0 replies 0 retweets 0 likes
        4. End of conversation
        1. Elliot Barlas‏ @ElliotBarlas Sep 2
          Replying to @cmuratori

          I'm not following how a signature would address the problem of a server application in a foreign data center possessing a secret. The signature also requires the secret. Also, this token endpoint call can exist in a security enclave. Token generation is distinct from token use.

          0 replies 0 retweets 1 like
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        1. Mike Southron‏ @SouthyUK Sep 2
          Replying to @cmuratori

          What you are describing is actually the correct way to do authentication, and is what anyone with half a brain does. The rise of JWT/OAuth type systems makes me sad because they equally more complex and less secure.

          0 replies 0 retweets 0 likes
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        1. Hasen Judy حسن الجودي‏ @hasen_judy Sep 2
          Replying to @cmuratori

          Not only oauth. All web services that provide "API" use this model of requiring you to pass the secret in the request header. Even services you pay for.

          0 replies 0 retweets 0 likes
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        1. CD‏ @daddyxtof Sep 2
          Replying to @cmuratori

          A signature would require a public/private key pair which has its own management issue no? And for financial transactions you would in any case expect the entire application to be in a secure enclave irrespective of the authorisation model.

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        1. Jimmy Blevins‏ @jblevinsradio Sep 2
          Replying to @cmuratori

          I would guess more ‘responsible’ companies encrypt all private data in transit and at rest but don’t consider unencrypted data in processors and memory. Leaking ANY private data is a regulatory issue. Pub/Priv signature schemes are better regardless of encrypt/secureproc use.

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