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RichFelker's profile
Rich Felker
Rich Felker
Rich Felker
@RichFelker

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Rich Felker

@RichFelker

Yeah, I do @musllibc, FOSS & infosec stuff. But now is not the time for a mostly-/only-tech Twitter feed.

musl-libc.org
Joined March 2014

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    1. Hector Martin‏ @marcan42 27 Dec 2017

      Hector Martin Retweeted Daniel Bilar

      Your language may be "safe" and you may pass test vectors but reimplementing crypto is *still* a bad idea.https://twitter.com/daniel_bilar/status/946034680062730240 …

      Hector Martin added,

      Daniel Bilar @daniel_bilar
      Go impl of the P-256 ECC had small bug due to a misplaced carry bit affecting <0.00000003% of field subtraction ops. Filippo and co. built a full practical key recovery attack on top of it, capable of targeting JSON Web Encryption https://twitter.com/jilles_com/status/946016218900819968 … https://twitter.com/FiloSottile/status/932677074975936513 …
      4 replies 53 retweets 110 likes
      Rich Felker‏ @RichFelker 28 Dec 2017
      Replying to @marcan42 @whitequark

      To be fair, asm isn't safe. They wrote sketchy asm to go with a semi-safe language.

      10:49 PM - 28 Dec 2017
      • 1 Like
      • whitequark
      1 reply 0 retweets 1 like
        1. New conversation
        2. Hector Martin‏ @marcan42 28 Dec 2017
          Replying to @RichFelker @whitequark

          But the bug is a logic bug that a "safe" language wouldn't help with.

          1 reply 0 retweets 4 likes
        3. Rich Felker‏ @RichFelker 28 Dec 2017
          Replying to @marcan42 @whitequark

          True, but the HLL implementation likely had more scrutiny (& readability), opportunity to use verification tools/formal methods, etc...

          1 reply 0 retweets 0 likes
        4. Hector Martin‏ @marcan42 28 Dec 2017
          Replying to @RichFelker @whitequark

          Actually, formally verifying assembler is a *lot* easier than a HLL, especially if you don't make the assumption that the HLL compiler/runtime are perfect (which is a terrible assumption, see my recent blog post ;))

          1 reply 0 retweets 9 likes
        5. Steve Canon‏ @stephentyrone 29 Dec 2017
          Replying to @marcan42 @RichFelker @whitequark

          Yeah, I would *love* to see more work on formally checked assembly programming tools. It's a niche area, but an extremely valuable one.

          1 reply 0 retweets 5 likes
        6. 3 more replies

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