gnutls_x509_trust_list_verify_crt2(3) — Linux manual page



NAME         top

       gnutls_x509_trust_list_verify_crt2 - API function

SYNOPSIS         top

       #include <gnutls/x509.h>

       int gnutls_x509_trust_list_verify_crt2(gnutls_x509_trust_list_t
       list, gnutls_x509_crt_t * cert_list, unsigned int cert_list_size,
       gnutls_typed_vdata_st * data, unsigned int elements, unsigned int
       flags, unsigned int * voutput, gnutls_verify_output_function

ARGUMENTS         top

       gnutls_x509_trust_list_t list
                   The list

       gnutls_x509_crt_t * cert_list
                   is the certificate list to be verified

       unsigned int cert_list_size
                   is the certificate list size

       gnutls_typed_vdata_st * data
                   an array of typed data

       unsigned int elements
                   the number of data elements

       unsigned int flags
                   Flags that may be used to change the verification
                   algorithm. Use OR of the
                   gnutls_certificate_verify_flags enumerations.

       unsigned int * voutput
                   will hold the certificate verification output.

       gnutls_verify_output_function func
                   If non-null will be called on each chain element
                   verification with the output.

DESCRIPTION         top

       This function will attempt to verify the given certificate chain
       and return its status. The  voutput parameter will hold an OR'ed
       sequence of gnutls_certificate_status_t flags.

       When a certificate chain of  cert_list_size with more than one
       certificates is provided, the verification status will apply to
       the first certificate in the chain that failed verification. The
       verification process starts from the end of the chain (from CA to
       end certificate). The first certificate in the chain must be the
       end-certificate while the rest of the members may be sorted or

       Additionally a certificate verification profile can be specified
       from the ones in gnutls_certificate_verification_profiles_t by
       ORing the result of GNUTLS_PROFILE_TO_VFLAGS() to the
       verification flags.

       Additional verification parameters are possible via the  data
       types; the acceptable types are GNUTLS_DT_DNS_HOSTNAME,
       accepts as data a null-terminated hostname, 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 end certificate
       against the given. If names do not match the
       GNUTLS_CERT_UNEXPECTED_OWNER status flag will be set. In addition
       it will consider certificates provided with

       If a key purpose OID is provided and the end-certificate contains
       the extended key usage PKIX extension, it will be required to
       match the provided OID or be marked for any purpose, otherwise
       verification will fail with GNUTLS_CERT_PURPOSE_MISMATCH status.

RETURNS         top

       On success, GNUTLS_E_SUCCESS (0) is returned, otherwise a
       negative error value. Note that verification failure will not
       result to an error code, only  voutput will be updated.

SINCE         top


REPORTING BUGS         top

       Report bugs to <>.
       Home page:

COPYRIGHT         top

       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         top

       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 

COLOPHON         top

       This page is part of the GnuTLS (GnuTLS Transport Layer Security
       Library) project.  Information about the project can be found at
       ⟨⟩.  If you have a bug report for this
       manual page, send it to  This page was obtained
       from the tarball gnutls-3.7.2.tar.xz fetched from
       ⟨⟩ on 2021-08-27.  If you
       discover any rendering problems in this HTML version of the page,
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       manual page), send a mail to

gnutls                            3.g7n.u2tls_x509_trust_list_verify_crt2(3)