gnutls_certificate_verify_peers(3) gnutls gnutls_certificate_verify_peers(3)
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 the sta-
tus in the status variable as a bitwise OR of gnutls_certificate_sta-
tus_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 docu-
mentation of gnutls_certificate_verify_peers2() for details in the ver-
ification 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).
The acceptable data types are GNUTLS_DT_DNS_HOSTNAME,
GNUTLS_DT_RFC822NAME and GNUTLS_DT_KEY_PURPOSE_OID. The former two ac-
cept as data a null-terminated hostname or email address, and the lat-
ter a null-terminated object identifier (e.g.,
GNUTLS_KP_TLS_WWW_SERVER).
If a DNS hostname is provided then this function will compare the host-
name 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 status will have
the GNUTLS_CERT_SIGNER_CONSTRAINTS_FAILURE flag set.
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
3.3.0
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 no-
tice 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/
gnutls 3.7.3 gnutls_certificate_verify_peers(3)
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