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Exclude all platform authenticators that use self attesation from hav… #2150

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Exclude all platform authenticators that use self attesation from hav… #2150

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2 changes: 1 addition & 1 deletion index.bs
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Original file line number Diff line number Diff line change
Expand Up @@ -2175,7 +2175,7 @@ a numbered step. If outdented, it (today) is rendered as a bullet in the midst o
: {{AttestationConveyancePreference/none}}
:: Replace potentially uniquely identifying information with non-identifying versions of the
same:
1. If the [=authData/attestedCredentialData/aaguid=] in the [=attested credential data=] is 16 zero bytes, <code>|credentialCreationData|.[=attestationObjectResult=].fmt</code> is "packed", and "x5c" is absent from <code>|credentialCreationData|.[=attestationObjectResult=]</code>, then [=self attestation=] is being used and no further action is needed.
1. If the [=authData/attestedCredentialData/aaguid=] in the [=attested credential data=] is 16 zero bytes or |authenticator| is a [=platform authenticator=], <code>|credentialCreationData|.[=attestationObjectResult=].fmt</code> is "packed", and "x5c" is absent from <code>|credentialCreationData|.[=attestationObjectResult=]</code>, then [=self attestation=] is being used and no further action is needed.
1. Otherwise:
1. Set the value of <code>|credentialCreationData|.[=attestationObjectResult=].fmt</code> to "none", and set the value of <code>|credentialCreationData|.[=attestationObjectResult=].attStmt</code> to be an empty [=CBOR=] map. (See [[#sctn-none-attestation]] and [[#sctn-generating-an-attestation-object]]).
1. If |authenticator| is not a [=platform authenticator=] then replace the [=authData/attestedCredentialData/aaguid=] in the [=attested credential data=] with 16 zero bytes.
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