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/