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marcan42's profile
Hector Martin
Hector Martin
Hector Martin
@marcan42

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Hector Martin

@marcan42

If it ain't broke, I'll fix it! I'm porting Linux to Apple Silicon Macs at @AsahiLinux. http://patreon.com/marcan  | http://github.com/sponsors/marcan 

Tokyo, Japan
marcan.st
Joined May 2009

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    1. Hector Martin‏ @marcan42 8 Nov 2017
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      Flip side: why are all these countries/users panicking *now*? The vuln was disclosed to Infineon in *February*. This means 6 months of "responsible" disclosure have been utterly worthless. You'd think Infineon would've notified, you know, government clients? WTF? @CRoCS_MUNI

      2 replies 6 retweets 11 likes
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    2. Igor Skochinsky‏ @IgorSkochinsky 8 Nov 2017
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      Replying to @marcan42 @CRoCS_MUNI

      My guess wold be that Infineon notified smartcard *chip makers* but they didn't bother informing their customers in turn. Maybe we can ask @e_estonia when and how they got warned.

      2 replies 0 retweets 0 likes
    3. Hector Martin‏ @marcan42 8 Nov 2017
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      Replying to @IgorSkochinsky @CRoCS_MUNI @e_estonia

      You mean smartcard manufacturers, as in the physical bits of plastic and some gold pads? Infineon makes the ICs.

      1 reply 0 retweets 0 likes
    4. Igor Skochinsky‏ @IgorSkochinsky 8 Nov 2017
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      Replying to @marcan42 @CRoCS_MUNI @e_estonia

      hm really? I thought it's guys like NXP, Gemalto etc.

      1 reply 0 retweets 0 likes
    5. Hector Martin‏ @marcan42 8 Nov 2017
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      Replying to @IgorSkochinsky @CRoCS_MUNI @e_estonia

      NXP and Infineon make ICs (and software libs). Gemalto makes cards that use those ICs (and more software).

      1 reply 0 retweets 1 like
    6. Igor Skochinsky‏ @IgorSkochinsky 8 Nov 2017
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      Replying to @marcan42 @CRoCS_MUNI

      Interesting, thanks. However, I wonder why ID cards are affected at all. Aren't the private keys/certificates usually generated centrally on dedicated govt hardware and only the public keys are programmed into the cards? Do the cards still generate some keys on their own?

      1 reply 0 retweets 0 likes
    7. Hector Martin‏ @marcan42 8 Nov 2017
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      Replying to @IgorSkochinsky @CRoCS_MUNI

      The whole point of using smartcards is that you generate the keys internally (and they never leave the card), then the govt signs the public key (presumably with some channel attestation involved so the card can prove it's a real card issued originally by govt).

      2 replies 0 retweets 0 likes
    8. Jernej Simončič‏ @jernej__s 8 Nov 2017
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      Replying to @marcan42 @IgorSkochinsky @CRoCS_MUNI

      Makes me wonder if there's some way to tell if a cert was generated on card, or imported from elsewhere.

      1 reply 0 retweets 1 like
      Hector Martin‏ @marcan42 8 Nov 2017
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      Replying to @jernej__s @IgorSkochinsky @CRoCS_MUNI

      There is; public keys can be trivially checked for the ROCA fingerprint in microseconds. If you mean in a more general case, usually what happens is cards are provisioned with a private key at manufacture time that signs things to prove they're card-generated.

      4:30 AM - 8 Nov 2017
      1 reply 0 retweets 0 likes
        1. Jernej Simončič‏ @jernej__s 8 Nov 2017
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          Replying to @marcan42 @IgorSkochinsky @CRoCS_MUNI

          I've got a .NET card with national Post-issued certificate that doesn't test positive for ROCA, which is why I'm curious about how it was generated.

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