| FIDO_ASSERT_VERIFY(3) | Library Functions Manual | FIDO_ASSERT_VERIFY(3) | 
fido_assert_verify —
#include <fido.h>
int
  
  fido_assert_verify(const
    fido_assert_t *assert,
    size_t idx,
    int cose_alg,
    const void *pk);
fido_assert_verify() function verifies whether the
  signature contained in statement index idx of
  assert matches the parameters of the assertion. Before
  using fido_assert_verify() in a sensitive context, the
  reader is strongly encouraged to make herself familiar with the FIDO2
  assertion statement process as defined in the Web Authentication (webauthn)
  standard.
A brief description follows:
The fido_assert_verify() function verifies
    whether the client data hash, relying party ID, user presence and user
    verification attributes of assert have been attested
    by the holder of the private counterpart of the public key
    pk of COSE type cose_alg, where
    cose_alg is COSE_ES256,
    COSE_ES384, COSE_RS256, or
    COSE_EDDSA, and pk points to a
    es256_pk_t, es384_pk_t,
    rs256_pk_t, or eddsa_pk_t type
    accordingly.
Please note that the first statement in assert has an idx of 0.
fido_assert_verify() are
  defined in <fido/err.h>. If
  statement idx of assert passes
  verification with pk, then
  FIDO_OK is returned.
| $Mdocdate: July 15 2022 $ | NetBSD 10.0 |