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check out this totally normal Ed25519 key my yubikey just generated:

{1: "OKP", 3: -8, -1: "Ed25519"}
[65 unused bytes after the end of the data item]
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I think what happened is that my yubikey returned a cbor structure that has 3 elements, but added enough data for 4 in there
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it appears that yubikey version 5.4.3 has broken ed25519 fido2 signing

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@charlotte the yubikey key version? like the one that you can’t update???? oh boy

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@scarlett From what i can tell that is the most recent firmware version of the yubikey 5 series

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@charlotte That’s fucked, and the fact that you need to buy a new one to fix it even once they do update the firmware

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