NAME

       gnutls_ocsp_resp_verify - API function

SYNOPSIS

       #include <gnutls/ocsp.h>

       int    gnutls_ocsp_resp_verify(gnutls_ocsp_resp_const_t   resp,   gnutls_x509_trust_list_t
       trustlist, unsigned int * verify, unsigned int flags);

ARGUMENTS

       gnutls_ocsp_resp_const_t resp
                   should contain a gnutls_ocsp_resp_t type

       gnutls_x509_trust_list_t trustlist
                   trust anchors as a gnutls_x509_trust_list_t type

       unsigned int * verify
                   output variable with verification status, an gnutls_ocsp_verify_reason_t

       unsigned int flags
                   verification flags from gnutls_certificate_verify_flags

DESCRIPTION

       Verify signature of the Basic OCSP Response against the public key in the certificate of a
       trusted signer.  The  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
       trustlist  .   A  trusted  signer is a certificate that is either in  trustlist , or it is
       signed directly by a certificate in
        trustlist and has the id-ad-ocspSigning Extended Key Usage bit set.

       The   output    verify   variable   will   hold   verification   status    codes    (e.g.,
       GNUTLS_OCSP_VERIFY_SIGNER_NOT_FOUND, GNUTLS_OCSP_VERIFY_INSECURE_ALGORITHM) which are only
       valid if the function returned GNUTLS_E_SUCCESS.

       Note that the function returns GNUTLS_E_SUCCESS even when verification failed.  The caller
       must always inspect the  verify variable to find out the verification status.

       The  flags variable should be 0 for now.

RETURNS

       On success, GNUTLS_E_SUCCESS (0) is returned, otherwise a negative error value.

REPORTING BUGS

       Report bugs to <bugs@gnutls.org>.
       Home page: https://www.gnutls.org

COPYRIGHT

       Copyright © 2001-2023 Free Software Foundation, Inc., and others.
       Copying  and distribution of this file, with or without modification, are permitted in any
       medium without royalty provided the copyright notice and this notice are preserved.

SEE ALSO

       The  full  documentation  for  gnutls  is  maintained  as  a  Texinfo  manual.    If   the
       /usr/share/doc/gnutls/ directory does not contain the HTML form visit

       https://www.gnutls.org/manual/