### Property

# Gio TlsClientConnection:validation-flags

deprecated: 2.72 since: 2.28

#### Declaration

    property validation-flags: Gio.TlsCertificateFlags [ read, write, construct ]

#### Description

What steps to perform when validating a certificate received from a server. Server certificates that fail to validate in any of the ways indicated here will be rejected unless the application overrides the default via `GTlsConnection::accept-certificate`.

GLib guarantees that if certificate verification fails, at least one flag will be set, but it does not guarantee that all possible flags will be set. Accordingly, you may not safely decide to ignore any particular type of error. For example, it would be incorrect to mask `G_TLS_CERTIFICATE_EXPIRED` if you want to allow expired certificates, because this could potentially be the only error flag set even if other problems exist with the certificate. Therefore, there is no safe way to use this property. This is not a horrible problem, though, because you should not be attempting to ignore validation errors anyway. If you really must ignore TLS certificate errors, connect to `GTlsConnection::accept-certificate`.

Type: | `GTlsCertificateFlags`
Available since: | 2.28
Deprecated since: | 2.72
Do not attempt to ignore validation errors.

Default value | G_TLS_CERTIFICATE_UNKNOWN_CA | G_TLS_CERTIFICATE_BAD_IDENTITY | G_TLS_CERTIFICATE_NOT_ACTIVATED | G_TLS_CERTIFICATE_EXPIRED | G_TLS_CERTIFICATE_REVOKED | G_TLS_CERTIFICATE_INSECURE | G_TLS_CERTIFICATE_GENERIC_ERROR
Getter method | `g_tls_client_connection_get_validation_flags()`
Setter method | `g_tls_client_connection_set_validation_flags()`

#### Flags

Readable | yes
Writable | yes
Construct | yes
Construct only | no