1FIDO_CRED_VERIFY(3) BSD Library Functions Manual FIDO_CRED_VERIFY(3)
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4 fido_cred_verify — verifies the signature of a FIDO 2 credential
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7 #include <fido.h>
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9 int
10 fido_cred_verify(const fido_cred_t *cred);
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13 The fido_cred_verify() function verifies whether the signature contained
14 in cred matches the attributes of the credential. Before using
15 fido_cred_verify() in a sensitive context, the reader is strongly encour‐
16 aged to make herself familiar with the FIDO 2 credential attestation
17 process as defined in the Web Authentication (webauthn) standard.
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19 A brief description follows:
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21 The fido_cred_verify() function verifies whether the client data hash,
22 relying party ID, credential ID, type, and resident key and user verifi‐
23 cation attributes of cred have been attested by the holder of the private
24 counterpart of the public key contained in the credential's x509 certifi‐
25 cate.
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27 Please note that the x509 certificate itself is not verified.
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29 The attestation statement formats supported by fido_cred_verify() are
30 packed and fido-u2f. The attestation type implemented by
31 fido_cred_verify() is Basic Attestation. The attestation key pair is
32 assumed to be of the type ES256. Other attestation formats and types are
33 not supported.
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36 The error codes returned by fido_cred_verify() are defined in
37 <fido/err.h>. If cred passes verification, then FIDO_OK is returned.
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40 fido_cred_new(3), fido_cred_set_authdata(3)
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42BSD May 10, 2020 BSD