NAME

       gnutls_certificate_verify_peers - API function

SYNOPSIS

       #include <gnutls/gnutls.h>

       int   gnutls_certificate_verify_peers(gnutls_session_t  session,  gnutls_typed_vdata_st  *
       data, unsigned int elements, unsigned int * status);

ARGUMENTS

       gnutls_session_t session
                   is a gnutls session

       gnutls_typed_vdata_st * data
                   an array of typed data

       unsigned int elements
                   the number of data elements

       unsigned int * status
                   is the output of the verification

DESCRIPTION

       This function will verify the peer's certificate and  store  the  status  in  the   status
       variable  as  a bitwise or'd gnutls_certificate_status_t values or zero if the certificate
       is trusted. Note that value in  status is set only when the return value of this  function
       is  success  (i.e, failure to trust a certificate does not imply a negative return value).
       The  default  verification  flags  used  by  this  function  can   be   overridden   using
       gnutls_certificate_set_verify_flags().        See        the        documentation       of
       gnutls_certificate_verify_peers2() for details in the verification process.

       The  acceptable   data  types   are   GNUTLS_DT_DNS_HOSTNAME,   GNUTLS_DT_RFC822NAME   and
       GNUTLS_DT_KEY_PURPOSE_OID.   The  former  two accept as data a null-terminated hostname or
       email   address,   and   the   latter   a   null-terminated   object   identifier   (e.g.,
       GNUTLS_KP_TLS_WWW_SERVER).   If a DNS hostname is provided then this function will compare
       the  hostname  in  the  certificate  against  the  given.  If  names  do  not  match   the
       GNUTLS_CERT_UNEXPECTED_OWNER  status  flag  will be set.  If a key purpose OID is provided
       and the end-certificate contains the  extended  key  usage  PKIX  extension,  it  will  be
       required  to  be  have  the  provided  key purpose or be marked for any purpose, otherwise
       verification will fail with GNUTLS_CERT_SIGNER_CONSTRAINTS_FAILURE status.

RETURNS

       a negative error code on error and GNUTLS_E_SUCCESS (0) when the  peer's  certificate  was
       successfully parsed, whether or not it was verified.

SINCE

       3.3.0

REPORTING BUGS

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

COPYRIGHT

       Copyright © 2001-2021 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

       http://www.gnutls.org/manual/