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gnutls_certificate_verify_peers3(3)                                     gnutls


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 (C) 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/local/share/doc/gnutls/ directory does not contain the HTML
       form visit

       https://www.gnutls.org/manual/

gnutls                               3.7.9 gnutls_certificate_verify_peers3(3)

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