bionic (3) dane_verify_crt.3.gz

Provided by: gnutls-doc_3.5.18-1ubuntu1.6_all bug

NAME
       dane_verify_crt - API function


SYNOPSIS
       #include <gnutls/dane.h>

       int    dane_verify_crt(dane_state_t    s,    const   gnutls_datum_t   *   chain,   unsigned   chain_size,
       gnutls_certificate_type_t chain_type, const char * hostname, const  char  *  proto,  unsigned  int  port,
       unsigned int sflags, unsigned int vflags, unsigned int * verify);


ARGUMENTS
       dane_state_t s
                   A DANE state structure (may be NULL)

       const gnutls_datum_t * chain
                   A certificate chain

       unsigned chain_size
                   The size of the chain

       gnutls_certificate_type_t chain_type
                   The type of the certificate chain

       const char * hostname
                   The hostname associated with the chain

       const char * proto
                   The protocol of the service connecting (e.g. tcp)

       unsigned int port
                   The port of the service connecting (e.g. 443)

       unsigned int sflags
                   Flags for the initialization of  s (if NULL)

       unsigned int vflags
                   Verification flags; an OR'ed list of dane_verify_flags_t.

       unsigned int * verify
                   An OR'ed list of dane_verify_status_t.


DESCRIPTION
       This  function  will  verify the given certificate chain against the CA constrains and/or the certificate
       available via DANE.  If no information via DANE can be obtained the flag DANE_VERIFY_NO_DANE_INFO is set.
       If   a   DNSSEC   signature   is   not   available   for   the   DANE   record   then   the  verify  flag
       DANE_VERIFY_NO_DNSSEC_DATA is set.

       Due to the many possible options of DANE, there is no single threat model countered. When  notifying  the
       user  about  DANE  verification results it may be better to mention: DANE verification did not reject the
       certificate, rather than mentioning a successful DANE verication.

       Note that this function is designed to be run in addition to PKIX - certificate chain - verification.  To
       be  run independently the DANE_VFLAG_ONLY_CHECK_EE_USAGE flag should be specified; then the function will
       check whether the key of the peer matches the key advertized in the DANE entry.


RETURNS
       a negative error code on error and DANE_E_SUCCESS (0) when the DANE  entries  were  successfully  parsed,
       irrespective  of whether they were verified (see  verify for that information). If no usable entries were
       encountered DANE_E_REQUESTED_DATA_NOT_AVAILABLE will be returned.


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


       Copyright © 2001-2022 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/