NAME

       gnutls_certificate_verify_peers3 - API function

SYNOPSIS

       #include <gnutls/gnutls.h>

       int  gnutls_certificate_verify_peers3(gnutls_session_t  session,  const  char  * hostname,
       unsigned int * status);

ARGUMENTS

       gnutls_session_t session
                   is a gnutls session

       const char * hostname
                   is the expected name of the peer; may be NULL

       unsigned int * status
                   is the output of the verification

DESCRIPTION

       This function will verify the peer's certificate and store the the status in  the   status
       variable  as a bitwise OR of 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.

       This function will take into account the stapled OCSP responses sent  by  the  server,  as
       well as the following X.509 certificate extensions: Name Constraints, Key Usage, and Basic
       Constraints (pathlen).

       If the  hostname provided is non-NULL then this function will compare the hostname in  the
       certificate  against  it. The comparison will follow the RFC6125 recommendations. If names
       do not match the GNUTLS_CERT_UNEXPECTED_OWNER status flag will be set.

       In order to verify the purpose of  the  end-certificate  (by  checking  the  extended  key
       usage), use gnutls_certificate_verify_peers().

       To avoid denial of service attacks some default upper limits regarding the certificate key
       size and chain size are set. To override them use gnutls_certificate_set_verify_limits().

       Note that when using raw public-keys verification  will  not  work  because  there  is  no
       corresponding certificate body belonging to the raw key that can be verified. In that case
       this function will return GNUTLS_E_INVALID_REQUEST.

RETURNS

       GNUTLS_E_SUCCESS (0) when the validation is performed, or a negative error code otherwise.
       A  successful  error  code  means that the  status parameter must be checked to obtain the
       validation status.

SINCE

       3.1.4

REPORTING BUGS

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

COPYRIGHT

       Copyright © 2001- 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/