Struct gio::DBusAuthObserver

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#[repr(transparent)]
pub struct DBusAuthObserver { /* private fields */ }
Expand description

The DBusAuthObserver type provides a mechanism for participating in how a DBusServer (or a DBusConnection) authenticates remote peers. Simply instantiate a DBusAuthObserver and connect to the signals you are interested in. Note that new signals may be added in the future

Controlling Authentication Mechanisms

By default, a DBusServer or server-side DBusConnection will allow any authentication mechanism to be used. If you only want to allow D-Bus connections with the EXTERNAL mechanism, which makes use of credentials passing and is the recommended mechanism for modern Unix platforms such as Linux and the BSD family, you would use a signal handler like this:

⚠️ The following code is in C ⚠️

static gboolean
on_allow_mechanism (GDBusAuthObserver *observer,
                    const gchar       *mechanism,
                    gpointer           user_data)
{
  if (g_strcmp0 (mechanism, "EXTERNAL") == 0)
    {
      return TRUE;
    }

  return FALSE;
}

Controlling Authorization # {auth-observer}

By default, a DBusServer or server-side DBusConnection will accept connections from any successfully authenticated user (but not from anonymous connections using the ANONYMOUS mechanism). If you only want to allow D-Bus connections from processes owned by the same uid as the server, since GLib 2.68, you should use the DBusServerFlags::AUTHENTICATION_REQUIRE_SAME_USER flag. It’s equivalent to the following signal handler:

⚠️ The following code is in C ⚠️

static gboolean
on_authorize_authenticated_peer (GDBusAuthObserver *observer,
                                 GIOStream         *stream,
                                 GCredentials      *credentials,
                                 gpointer           user_data)
{
  gboolean authorized;

  authorized = FALSE;
  if (credentials != NULL)
    {
      GCredentials *own_credentials;
      own_credentials = g_credentials_new ();
      if (g_credentials_is_same_user (credentials, own_credentials, NULL))
        authorized = TRUE;
      g_object_unref (own_credentials);
    }

  return authorized;
}

Signals

allow-mechanism

Emitted to check if mechanism is allowed to be used.

authorize-authenticated-peer

Emitted to check if a peer that is successfully authenticated is authorized.

Implements

glib::ObjectExt

Implementations§

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impl DBusAuthObserver

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pub fn new() -> DBusAuthObserver

Creates a new DBusAuthObserver object.

Returns

A DBusAuthObserver. Free with g_object_unref().

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pub fn allow_mechanism(&self, mechanism: &str) -> bool

Emits the allow-mechanism signal on self.

mechanism

The name of the mechanism, e.g. DBUS_COOKIE_SHA1.

Returns

true if mechanism can be used to authenticate the other peer, false if not.

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pub fn authorize_authenticated_peer( &self, stream: &impl IsA<IOStream>, credentials: Option<&Credentials> ) -> bool

Emits the authorize-authenticated-peer signal on self.

stream

A IOStream for the DBusConnection.

credentials

Credentials received from the peer or None.

Returns

true if the peer is authorized, false if not.

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pub fn connect_allow_mechanism<F: Fn(&Self, &str) -> bool + 'static>( &self, f: F ) -> SignalHandlerId

Emitted to check if mechanism is allowed to be used.

mechanism

The name of the mechanism, e.g. DBUS_COOKIE_SHA1.

Returns

true if mechanism can be used to authenticate the other peer, false if not.

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pub fn connect_authorize_authenticated_peer<F: Fn(&Self, &IOStream, Option<&Credentials>) -> bool + 'static>( &self, f: F ) -> SignalHandlerId

Emitted to check if a peer that is successfully authenticated is authorized.

stream

A IOStream for the DBusConnection.

credentials

Credentials received from the peer or None.

Returns

true if the peer is authorized, false if not.

Trait Implementations§

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impl Clone for DBusAuthObserver

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fn clone(&self) -> Self

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for DBusAuthObserver

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl Default for DBusAuthObserver

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fn default() -> Self

Returns the “default value” for a type. Read more
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impl Display for DBusAuthObserver

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl HasParamSpec for DBusAuthObserver

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type ParamSpec = ParamSpecObject

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type SetValue = DBusAuthObserver

Preferred value to be used as setter for the associated ParamSpec.
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type BuilderFn = fn(_: &str) -> ParamSpecObjectBuilder<'_, DBusAuthObserver>

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fn param_spec_builder() -> Self::BuilderFn

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impl Hash for DBusAuthObserver

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fn hash<H>(&self, state: &mut H)where H: Hasher,

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl Ord for DBusAuthObserver

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fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other. Read more
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fn max(self, other: Self) -> Selfwhere Self: Sized,

Compares and returns the maximum of two values. Read more
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fn min(self, other: Self) -> Selfwhere Self: Sized,

Compares and returns the minimum of two values. Read more
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fn clamp(self, min: Self, max: Self) -> Selfwhere Self: Sized + PartialOrd<Self>,

Restrict a value to a certain interval. Read more
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impl ParentClassIs for DBusAuthObserver

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impl<OT: ObjectType> PartialEq<OT> for DBusAuthObserver

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fn eq(&self, other: &OT) -> bool

This method tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl<OT: ObjectType> PartialOrd<OT> for DBusAuthObserver

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fn partial_cmp(&self, other: &OT) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
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fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator. Read more
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fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
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fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator. Read more
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fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
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impl StaticType for DBusAuthObserver

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fn static_type() -> Type

Returns the type identifier of Self.
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impl Eq for DBusAuthObserver

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impl<T, U> TryFrom<U> for Twhere U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T> TryFromClosureReturnValue for Twhere T: for<'a> FromValue<'a> + StaticType + 'static,

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impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<Super, Sub> CanDowncast<Sub> for Superwhere Super: IsA<Super>, Sub: IsA<Super>,

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impl<'a, T, C, E> FromValueOptional<'a> for Twhere T: FromValue<'a, Checker = C>, C: ValueTypeChecker<Error = ValueTypeMismatchOrNoneError<E>>, E: Error + Send + 'static,