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@deftypefun {int} {gnutls_ocsp_resp_verify} (gnutls_ocsp_resp_t @var{resp}, gnutls_x509_trust_list_t @var{trustlist}, unsigned int * @var{verify}, unsigned int @var{flags})
@var{resp}: should contain a @code{gnutls_ocsp_resp_t} structure
@var{trustlist}: trust anchors as a @code{gnutls_x509_trust_list_t} structure
@var{verify}: output variable with verification status, an @code{gnutls_ocsp_cert_status_t}
@var{flags}: verification flags, 0 for now.
Verify signature of the Basic OCSP Response against the public key
in the certificate of a trusted signer. The @code{trustlist} should be
populated with trust anchors. The function will extract the signer
certificate from the Basic OCSP Response and will verify it against
the @code{trustlist} . A trusted signer is a certificate that is either
in @code{trustlist} , or it is signed directly by a certificate in
@code{trustlist} and has the id-ad-ocspSigning Extended Key Usage bit
set.
The output @code{verify} variable will hold verification status codes
(e.g., @code{GNUTLS_OCSP_VERIFY_SIGNER_NOT_FOUND} ,
@code{GNUTLS_OCSP_VERIFY_INSECURE_ALGORITHM} ) which are only valid if the
function returned @code{GNUTLS_E_SUCCESS} .
Note that the function returns @code{GNUTLS_E_SUCCESS} even when
verification failed. The caller must always inspect the @code{verify} variable to find out the verification status.
The @code{flags} variable should be 0 for now.
@strong{Returns:} On success, @code{GNUTLS_E_SUCCESS} (0) is returned, otherwise a
negative error value.
@end deftypefun
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