Klas Lindfors
21 lines
965 B
Plaintext
21 lines
965 B
Plaintext
Using Attestation
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-----------------
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Attestation works through a special key slot called “f9” this comes
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pre-loaded from factory with a key and cert signed by Yubico, but can be
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overwritten.
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After a key has been generated in a normal slot it can be attested by this
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special key, this can be realised by using the yubico-piv-tool action attest:
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$ yubico-piv-tool --action=generate --slot=9a
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...
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$ yubico-piv-tool --action=attest --slot=9a
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The output of this is a PEM encoded certificate, signed by the key in slot f9. There are a couple of special extensions on this certificate:
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* +1.3.6.1.4.1.41482.3.3+: Firmware version, encoded as 3 bytes, like: 040300 for 4.3.0
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* +1.3.6.1.4.1.41482.3.7+: Serial number, encoded as an integer.
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* +1.3.6.1.4.1.41482.3.8+: Two bytes, the first encoding pin policy and the second touch policy
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** Pin policy: 01 - never, 02 - once per session, 03 - always
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** Touch policy: 01 - never, 02 - always, 03 - cached for 15s
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