gnutls_certificate_verify_peers3 − API function


, const char * int
gnutls_certificate_verify_peers3(gnutls_session_t session

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

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.

If the  hostname provided is non−NULL then this function
will compare the hostname in the certificate against the
given. The comparison will be accurate for ascii names;
non−ascii names are compared byte−by−byte.  If names do not
match the GNUTLS_CERT_UNEXPECTED_OWNER status flag will be

In order to verify the purpose of the end−certificate (by
checking the extended key usage), use

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.


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