gnutls_certificate_verify_peers − API function


, gnutls_typed_vdata_st * int
gnutls_certificate_verify_peers(gnutls_session_t session

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

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.

The acceptable  data types are GNUTLS_DT_DNS_HOSTNAME,
former two accept as data a null−terminated hostname or
email address, 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 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

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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