Gio.TlsDatabase¶

Subclasses:	None

Methods¶

Inherited:	GObject.Object (37)
Structs:	GObject.ObjectClass (5)

	`create_certificate_handle` (certificate)
	`lookup_certificate_for_handle` (handle, interaction, flags, cancellable)
	`lookup_certificate_for_handle_async` (handle, interaction, flags, cancellable, callback, *user_data)
	`lookup_certificate_for_handle_finish` (result)
	`lookup_certificate_issuer` (certificate, interaction, flags, cancellable)
	`lookup_certificate_issuer_async` (certificate, interaction, flags, cancellable, callback, *user_data)
	`lookup_certificate_issuer_finish` (result)
	`lookup_certificates_issued_by` (issuer_raw_dn, interaction, flags, cancellable)
	`lookup_certificates_issued_by_async` (issuer_raw_dn, interaction, flags, cancellable, callback, *user_data)
	`lookup_certificates_issued_by_finish` (result)
	`verify_chain` (chain, purpose, identity, interaction, flags, cancellable)
	`verify_chain_async` (chain, purpose, identity, interaction, flags, cancellable, callback, *user_data)
	`verify_chain_finish` (result)

Virtual Methods¶

Inherited:	GObject.Object (7)

	`do_create_certificate_handle` (certificate)
	`do_lookup_certificate_for_handle` (handle, interaction, flags, cancellable)
	`do_lookup_certificate_for_handle_async` (handle, interaction, flags, cancellable, callback, *user_data)
	`do_lookup_certificate_for_handle_finish` (result)
	`do_lookup_certificate_issuer` (certificate, interaction, flags, cancellable)
	`do_lookup_certificate_issuer_async` (certificate, interaction, flags, cancellable, callback, *user_data)
	`do_lookup_certificate_issuer_finish` (result)
	`do_lookup_certificates_issued_by` (issuer_raw_dn, interaction, flags, cancellable)
	`do_lookup_certificates_issued_by_async` (issuer_raw_dn, interaction, flags, cancellable, callback, *user_data)
	`do_lookup_certificates_issued_by_finish` (result)
	`do_verify_chain` (chain, purpose, identity, interaction, flags, cancellable)
	`do_verify_chain_async` (chain, purpose, identity, interaction, flags, cancellable, callback, *user_data)
	`do_verify_chain_finish` (result)

Properties¶

None

Signals¶

Inherited:	GObject.Object (1)

Fields¶

Inherited:	GObject.Object (1)

Name	Type	Access	Description
parent_instance	`GObject.Object`	r

Class Details¶

class Gio.TlsDatabase(**kwargs)¶

Bases:	`GObject.Object`
Abstract:	Yes
Structure:	`Gio.TlsDatabaseClass`

Gio.TlsDatabase is used to look up certificates and other information from a certificate or key store. It is an abstract base class which TLS library specific subtypes override.

A Gio.TlsDatabase may be accessed from multiple threads by the TLS backend. All implementations are required to be fully thread-safe.

Most common client applications will not directly interact with Gio.TlsDatabase. It is used internally by Gio.TlsConnection.

New in version 2.30.

create_certificate_handle(certificate)[source]¶

Parameters:	certificate (`Gio.TlsCertificate`) – certificate for which to create a handle.
Returns:	a newly allocated string containing the handle.
Return type:	`str` or `None`

Create a handle string for the certificate. The database will only be able to create a handle for certificates that originate from the database. In cases where the database cannot create a handle for a certificate, None will be returned.

This handle should be stable across various instances of the application, and between applications. If a certificate is modified in the database, then it is not guaranteed that this handle will continue to point to it.

New in version 2.30.

lookup_certificate_for_handle(handle, interaction, flags, cancellable)[source]¶

Parameters:	handle (`str`) – a certificate handle interaction (`Gio.TlsInteraction` or `None`) – used to interact with the user if necessary flags (`Gio.TlsDatabaseLookupFlags`) – Flags which affect the lookup. cancellable (`Gio.Cancellable` or `None`) – a `Gio.Cancellable`, or `None`
Raises:	`GLib.Error`
Returns:	a newly allocated `Gio.TlsCertificate`, or `None`. Use `GObject.Object.unref`() to release the certificate.
Return type:	`Gio.TlsCertificate` or `None`

Look up a certificate by its handle.

The handle should have been created by calling Gio.TlsDatabase.create_certificate_handle() on a Gio.TlsDatabase object of the same TLS backend. The handle is designed to remain valid across instantiations of the database.

If the handle is no longer valid, or does not point to a certificate in this database, then None will be returned.

This function can block, use Gio.TlsDatabase.lookup_certificate_for_handle_async() to perform the lookup operation asynchronously.

New in version 2.30.

lookup_certificate_for_handle_async(handle, interaction, flags, cancellable, callback, *user_data)[source]¶

Parameters:

handle (str) – a certificate handle
interaction (Gio.TlsInteraction or None) – used to interact with the user if necessary
flags (Gio.TlsDatabaseLookupFlags) – Flags which affect the lookup.
cancellable (Gio.Cancellable or None) – a Gio.Cancellable, or None
callback (Gio.AsyncReadyCallback or None) – callback to call when the operation completes
user_data (object or None) – the data to pass to the callback function

Asynchronously look up a certificate by its handle in the database. See Gio.TlsDatabase.lookup_certificate_for_handle() for more information.

New in version 2.30.

lookup_certificate_for_handle_finish(result)[source]¶

Parameters:	result (`Gio.AsyncResult`) – a `Gio.AsyncResult`.
Raises:	`GLib.Error`
Returns:	a newly allocated `Gio.TlsCertificate` object. Use `GObject.Object.unref`() to release the certificate.
Return type:	`Gio.TlsCertificate`

Finish an asynchronous lookup of a certificate by its handle. See Gio.TlsDatabase.lookup_certificate_for_handle() for more information.

If the handle is no longer valid, or does not point to a certificate in this database, then None will be returned.

New in version 2.30.

lookup_certificate_issuer(certificate, interaction, flags, cancellable)[source]¶

Parameters:	certificate (`Gio.TlsCertificate`) – a `Gio.TlsCertificate` interaction (`Gio.TlsInteraction` or `None`) – used to interact with the user if necessary flags (`Gio.TlsDatabaseLookupFlags`) – flags which affect the lookup operation cancellable (`Gio.Cancellable` or `None`) – a `Gio.Cancellable`, or `None`
Raises:	`GLib.Error`
Returns:	a newly allocated issuer `Gio.TlsCertificate`, or `None`. Use `GObject.Object.unref`() to release the certificate.
Return type:	`Gio.TlsCertificate`

Look up the issuer of certificate in the database.

The Gio.TlsCertificate :issuer property of certificate is not modified, and the two certificates are not hooked into a chain.

This function can block, use Gio.TlsDatabase.lookup_certificate_issuer_async() to perform the lookup operation asynchronously.

New in version 2.30.

lookup_certificate_issuer_async(certificate, interaction, flags, cancellable, callback, *user_data)[source]¶

Parameters:

certificate (Gio.TlsCertificate) – a Gio.TlsCertificate
interaction (Gio.TlsInteraction or None) – used to interact with the user if necessary
flags (Gio.TlsDatabaseLookupFlags) – flags which affect the lookup operation
cancellable (Gio.Cancellable or None) – a Gio.Cancellable, or None
callback (Gio.AsyncReadyCallback or None) – callback to call when the operation completes
user_data (object or None) – the data to pass to the callback function

Asynchronously look up the issuer of certificate in the database. See Gio.TlsDatabase.lookup_certificate_issuer() for more information.

New in version 2.30.

lookup_certificate_issuer_finish(result)[source]¶

Parameters:	result (`Gio.AsyncResult`) – a `Gio.AsyncResult`.
Raises:	`GLib.Error`
Returns:	a newly allocated issuer `Gio.TlsCertificate`, or `None`. Use `GObject.Object.unref`() to release the certificate.
Return type:	`Gio.TlsCertificate`

Finish an asynchronous lookup issuer operation. See Gio.TlsDatabase.lookup_certificate_issuer() for more information.

New in version 2.30.

lookup_certificates_issued_by(issuer_raw_dn, interaction, flags, cancellable)[source]¶

Parameters:	issuer_raw_dn (`bytes`) – a `GLib.ByteArray` which holds the DER encoded issuer DN. interaction (`Gio.TlsInteraction` or `None`) – used to interact with the user if necessary flags (`Gio.TlsDatabaseLookupFlags`) – Flags which affect the lookup operation. cancellable (`Gio.Cancellable` or `None`) – a `Gio.Cancellable`, or `None`
Raises:	`GLib.Error`
Returns:	a newly allocated list of `Gio.TlsCertificate` objects. Use `GObject.Object.unref`() on each certificate, and g_list_free() on the release the list.
Return type:	[`Gio.TlsCertificate`]

Look up certificates issued by this issuer in the database.

This function can block, use Gio.TlsDatabase.lookup_certificates_issued_by_async() to perform the lookup operation asynchronously.

New in version 2.30.

lookup_certificates_issued_by_async(issuer_raw_dn, interaction, flags, cancellable, callback, *user_data)[source]¶

Parameters:

issuer_raw_dn (bytes) – a GLib.ByteArray which holds the DER encoded issuer DN.
interaction (Gio.TlsInteraction or None) – used to interact with the user if necessary
flags (Gio.TlsDatabaseLookupFlags) – Flags which affect the lookup operation.
cancellable (Gio.Cancellable or None) – a Gio.Cancellable, or None
callback (Gio.AsyncReadyCallback or None) – callback to call when the operation completes
user_data (object or None) – the data to pass to the callback function

Asynchronously look up certificates issued by this issuer in the database. See Gio.TlsDatabase.lookup_certificates_issued_by() for more information.

The database may choose to hold a reference to the issuer byte array for the duration of of this asynchronous operation. The byte array should not be modified during this time.

New in version 2.30.

lookup_certificates_issued_by_finish(result)[source]¶

Parameters:	result (`Gio.AsyncResult`) – a `Gio.AsyncResult`.
Raises:	`GLib.Error`
Returns:	a newly allocated list of `Gio.TlsCertificate` objects. Use `GObject.Object.unref`() on each certificate, and g_list_free() on the release the list.
Return type:	[`Gio.TlsCertificate`]

Finish an asynchronous lookup of certificates. See Gio.TlsDatabase.lookup_certificates_issued_by() for more information.

New in version 2.30.

verify_chain(chain, purpose, identity, interaction, flags, cancellable)[source]¶

Parameters:	chain (`Gio.TlsCertificate`) – a `Gio.TlsCertificate` chain purpose (`str`) – the purpose that this certificate chain will be used for. identity (`Gio.SocketConnectable` or `None`) – the expected peer identity interaction (`Gio.TlsInteraction` or `None`) – used to interact with the user if necessary flags (`Gio.TlsDatabaseVerifyFlags`) – additional verify flags cancellable (`Gio.Cancellable` or `None`) – a `Gio.Cancellable`, or `None`
Raises:	`GLib.Error`
Returns:	the appropriate `Gio.TlsCertificateFlags` which represents the result of verification.
Return type:	`Gio.TlsCertificateFlags`

Determines the validity of a certificate chain after looking up and adding any missing certificates to the chain.

chain is a chain of Gio.TlsCertificate objects each pointing to the next certificate in the chain by its Gio.TlsCertificate :issuer property. The chain may initially consist of one or more certificates. After the verification process is complete, chain may be modified by adding missing certificates, or removing extra certificates. If a certificate anchor was found, then it is added to the chain.

purpose describes the purpose (or usage) for which the certificate is being used. Typically purpose will be set to Gio.TLS_DATABASE_PURPOSE_AUTHENTICATE_SERVER which means that the certificate is being used to authenticate a server (and we are acting as the client).

The identity is used to ensure the server certificate is valid for the expected peer identity. If the identity does not match the certificate, Gio.TlsCertificateFlags.BAD_IDENTITY will be set in the return value. If identity is None, that bit will never be set in the return value. The peer identity may also be used to check for pinned certificates (trust exceptions) in the database. These may override the normal verification process on a host-by-host basis.

Currently there are no flags, and Gio.TlsDatabaseVerifyFlags.NONE should be used.

If chain is found to be valid, then the return value will be 0. If chain is found to be invalid, then the return value will indicate the problems found. If the function is unable to determine whether chain is valid or not (eg, because cancellable is triggered before it completes) then the return value will be Gio.TlsCertificateFlags.GENERIC_ERROR and error will be set accordingly. error is not set when chain is successfully analyzed but found to be invalid.

This function can block, use Gio.TlsDatabase.verify_chain_async() to perform the verification operation asynchronously.

New in version 2.30.

verify_chain_async(chain, purpose, identity, interaction, flags, cancellable, callback, *user_data)[source]¶

Parameters:

chain (Gio.TlsCertificate) – a Gio.TlsCertificate chain
purpose (str) – the purpose that this certificate chain will be used for.
identity (Gio.SocketConnectable or None) – the expected peer identity
interaction (Gio.TlsInteraction or None) – used to interact with the user if necessary
flags (Gio.TlsDatabaseVerifyFlags) – additional verify flags
cancellable (Gio.Cancellable or None) – a Gio.Cancellable, or None
callback (Gio.AsyncReadyCallback or None) – callback to call when the operation completes
user_data (object or None) – the data to pass to the callback function

Asynchronously determines the validity of a certificate chain after looking up and adding any missing certificates to the chain. See Gio.TlsDatabase.verify_chain() for more information.

New in version 2.30.

verify_chain_finish(result)[source]¶

Parameters:	result (`Gio.AsyncResult`) – a `Gio.AsyncResult`.
Raises:	`GLib.Error`
Returns:	the appropriate `Gio.TlsCertificateFlags` which represents the result of verification.
Return type:	`Gio.TlsCertificateFlags`

Finish an asynchronous verify chain operation. See Gio.TlsDatabase.verify_chain() for more information.

If chain is found to be valid, then the return value will be 0. If chain is found to be invalid, then the return value will indicate the problems found. If the function is unable to determine whether chain is valid or not (eg, because cancellable is triggered before it completes) then the return value will be Gio.TlsCertificateFlags.GENERIC_ERROR and error will be set accordingly. error is not set when chain is successfully analyzed but found to be invalid.

New in version 2.30.

do_create_certificate_handle(certificate) virtual¶

Parameters:	certificate (`Gio.TlsCertificate`) – certificate for which to create a handle.
Returns:	a newly allocated string containing the handle.
Return type:	`str` or `None`

Create a handle string for the certificate. The database will only be able to create a handle for certificates that originate from the database. In cases where the database cannot create a handle for a certificate, None will be returned.

This handle should be stable across various instances of the application, and between applications. If a certificate is modified in the database, then it is not guaranteed that this handle will continue to point to it.

New in version 2.30.

do_lookup_certificate_for_handle(handle, interaction, flags, cancellable) virtual¶

Parameters:	handle (`str`) – a certificate handle interaction (`Gio.TlsInteraction` or `None`) – used to interact with the user if necessary flags (`Gio.TlsDatabaseLookupFlags`) – Flags which affect the lookup. cancellable (`Gio.Cancellable` or `None`) – a `Gio.Cancellable`, or `None`
Returns:	a newly allocated `Gio.TlsCertificate`, or `None`. Use `GObject.Object.unref`() to release the certificate.
Return type:	`Gio.TlsCertificate` or `None`

Look up a certificate by its handle.

The handle should have been created by calling Gio.TlsDatabase.create_certificate_handle() on a Gio.TlsDatabase object of the same TLS backend. The handle is designed to remain valid across instantiations of the database.

If the handle is no longer valid, or does not point to a certificate in this database, then None will be returned.

This function can block, use Gio.TlsDatabase.lookup_certificate_for_handle_async() to perform the lookup operation asynchronously.

New in version 2.30.

do_lookup_certificate_for_handle_async(handle, interaction, flags, cancellable, callback, *user_data) virtual¶

Parameters:

handle (str) – a certificate handle
interaction (Gio.TlsInteraction or None) – used to interact with the user if necessary
flags (Gio.TlsDatabaseLookupFlags) – Flags which affect the lookup.
cancellable (Gio.Cancellable or None) – a Gio.Cancellable, or None
callback (Gio.AsyncReadyCallback or None) – callback to call when the operation completes
user_data (object or None) – the data to pass to the callback function

Asynchronously look up a certificate by its handle in the database. See Gio.TlsDatabase.lookup_certificate_for_handle() for more information.

New in version 2.30.

do_lookup_certificate_for_handle_finish(result) virtual¶

Parameters:	result (`Gio.AsyncResult`) – a `Gio.AsyncResult`.
Returns:	a newly allocated `Gio.TlsCertificate` object. Use `GObject.Object.unref`() to release the certificate.
Return type:	`Gio.TlsCertificate`

Finish an asynchronous lookup of a certificate by its handle. See Gio.TlsDatabase.lookup_certificate_for_handle() for more information.

If the handle is no longer valid, or does not point to a certificate in this database, then None will be returned.

New in version 2.30.

do_lookup_certificate_issuer(certificate, interaction, flags, cancellable) virtual¶

Parameters:	certificate (`Gio.TlsCertificate`) – a `Gio.TlsCertificate` interaction (`Gio.TlsInteraction` or `None`) – used to interact with the user if necessary flags (`Gio.TlsDatabaseLookupFlags`) – flags which affect the lookup operation cancellable (`Gio.Cancellable` or `None`) – a `Gio.Cancellable`, or `None`
Returns:	a newly allocated issuer `Gio.TlsCertificate`, or `None`. Use `GObject.Object.unref`() to release the certificate.
Return type:	`Gio.TlsCertificate`

Look up the issuer of certificate in the database.

The Gio.TlsCertificate :issuer property of certificate is not modified, and the two certificates are not hooked into a chain.

This function can block, use Gio.TlsDatabase.lookup_certificate_issuer_async() to perform the lookup operation asynchronously.

New in version 2.30.

do_lookup_certificate_issuer_async(certificate, interaction, flags, cancellable, callback, *user_data) virtual¶

Parameters:

certificate (Gio.TlsCertificate) – a Gio.TlsCertificate
interaction (Gio.TlsInteraction or None) – used to interact with the user if necessary
flags (Gio.TlsDatabaseLookupFlags) – flags which affect the lookup operation
cancellable (Gio.Cancellable or None) – a Gio.Cancellable, or None
callback (Gio.AsyncReadyCallback or None) – callback to call when the operation completes
user_data (object or None) – the data to pass to the callback function

Asynchronously look up the issuer of certificate in the database. See Gio.TlsDatabase.lookup_certificate_issuer() for more information.

New in version 2.30.

do_lookup_certificate_issuer_finish(result) virtual¶

Parameters:	result (`Gio.AsyncResult`) – a `Gio.AsyncResult`.
Returns:	a newly allocated issuer `Gio.TlsCertificate`, or `None`. Use `GObject.Object.unref`() to release the certificate.
Return type:	`Gio.TlsCertificate`

Finish an asynchronous lookup issuer operation. See Gio.TlsDatabase.lookup_certificate_issuer() for more information.

New in version 2.30.

do_lookup_certificates_issued_by(issuer_raw_dn, interaction, flags, cancellable) virtual¶

Parameters:	issuer_raw_dn (`bytes`) – a `GLib.ByteArray` which holds the DER encoded issuer DN. interaction (`Gio.TlsInteraction` or `None`) – used to interact with the user if necessary flags (`Gio.TlsDatabaseLookupFlags`) – Flags which affect the lookup operation. cancellable (`Gio.Cancellable` or `None`) – a `Gio.Cancellable`, or `None`
Returns:	a newly allocated list of `Gio.TlsCertificate` objects. Use `GObject.Object.unref`() on each certificate, and g_list_free() on the release the list.
Return type:	[`Gio.TlsCertificate`]

Look up certificates issued by this issuer in the database.

This function can block, use Gio.TlsDatabase.lookup_certificates_issued_by_async() to perform the lookup operation asynchronously.

New in version 2.30.

do_lookup_certificates_issued_by_async(issuer_raw_dn, interaction, flags, cancellable, callback, *user_data) virtual¶

Parameters:

issuer_raw_dn (bytes) – a GLib.ByteArray which holds the DER encoded issuer DN.
interaction (Gio.TlsInteraction or None) – used to interact with the user if necessary
flags (Gio.TlsDatabaseLookupFlags) – Flags which affect the lookup operation.
cancellable (Gio.Cancellable or None) – a Gio.Cancellable, or None
callback (Gio.AsyncReadyCallback or None) – callback to call when the operation completes
user_data (object or None) – the data to pass to the callback function

Asynchronously look up certificates issued by this issuer in the database. See Gio.TlsDatabase.lookup_certificates_issued_by() for more information.

The database may choose to hold a reference to the issuer byte array for the duration of of this asynchronous operation. The byte array should not be modified during this time.

New in version 2.30.

do_lookup_certificates_issued_by_finish(result) virtual¶

Parameters:	result (`Gio.AsyncResult`) – a `Gio.AsyncResult`.
Returns:	a newly allocated list of `Gio.TlsCertificate` objects. Use `GObject.Object.unref`() on each certificate, and g_list_free() on the release the list.
Return type:	[`Gio.TlsCertificate`]

Finish an asynchronous lookup of certificates. See Gio.TlsDatabase.lookup_certificates_issued_by() for more information.

New in version 2.30.

do_verify_chain(chain, purpose, identity, interaction, flags, cancellable) virtual¶

Parameters:	chain (`Gio.TlsCertificate`) – a `Gio.TlsCertificate` chain purpose (`str`) – the purpose that this certificate chain will be used for. identity (`Gio.SocketConnectable` or `None`) – the expected peer identity interaction (`Gio.TlsInteraction` or `None`) – used to interact with the user if necessary flags (`Gio.TlsDatabaseVerifyFlags`) – additional verify flags cancellable (`Gio.Cancellable` or `None`) – a `Gio.Cancellable`, or `None`
Returns:	the appropriate `Gio.TlsCertificateFlags` which represents the result of verification.
Return type:	`Gio.TlsCertificateFlags`

Determines the validity of a certificate chain after looking up and adding any missing certificates to the chain.

chain is a chain of Gio.TlsCertificate objects each pointing to the next certificate in the chain by its Gio.TlsCertificate :issuer property. The chain may initially consist of one or more certificates. After the verification process is complete, chain may be modified by adding missing certificates, or removing extra certificates. If a certificate anchor was found, then it is added to the chain.

purpose describes the purpose (or usage) for which the certificate is being used. Typically purpose will be set to Gio.TLS_DATABASE_PURPOSE_AUTHENTICATE_SERVER which means that the certificate is being used to authenticate a server (and we are acting as the client).

The identity is used to ensure the server certificate is valid for the expected peer identity. If the identity does not match the certificate, Gio.TlsCertificateFlags.BAD_IDENTITY will be set in the return value. If identity is None, that bit will never be set in the return value. The peer identity may also be used to check for pinned certificates (trust exceptions) in the database. These may override the normal verification process on a host-by-host basis.

Currently there are no flags, and Gio.TlsDatabaseVerifyFlags.NONE should be used.

If chain is found to be valid, then the return value will be 0. If chain is found to be invalid, then the return value will indicate the problems found. If the function is unable to determine whether chain is valid or not (eg, because cancellable is triggered before it completes) then the return value will be Gio.TlsCertificateFlags.GENERIC_ERROR and error will be set accordingly. error is not set when chain is successfully analyzed but found to be invalid.

This function can block, use Gio.TlsDatabase.verify_chain_async() to perform the verification operation asynchronously.

New in version 2.30.

do_verify_chain_async(chain, purpose, identity, interaction, flags, cancellable, callback, *user_data) virtual¶

Parameters:

chain (Gio.TlsCertificate) – a Gio.TlsCertificate chain
purpose (str) – the purpose that this certificate chain will be used for.
identity (Gio.SocketConnectable or None) – the expected peer identity
interaction (Gio.TlsInteraction or None) – used to interact with the user if necessary
flags (Gio.TlsDatabaseVerifyFlags) – additional verify flags
cancellable (Gio.Cancellable or None) – a Gio.Cancellable, or None
callback (Gio.AsyncReadyCallback or None) – callback to call when the operation completes
user_data (object or None) – the data to pass to the callback function

Asynchronously determines the validity of a certificate chain after looking up and adding any missing certificates to the chain. See Gio.TlsDatabase.verify_chain() for more information.

New in version 2.30.

do_verify_chain_finish(result) virtual¶

Parameters:	result (`Gio.AsyncResult`) – a `Gio.AsyncResult`.
Returns:	the appropriate `Gio.TlsCertificateFlags` which represents the result of verification.
Return type:	`Gio.TlsCertificateFlags`

Finish an asynchronous verify chain operation. See Gio.TlsDatabase.verify_chain() for more information.

If chain is found to be valid, then the return value will be 0. If chain is found to be invalid, then the return value will indicate the problems found. If the function is unable to determine whether chain is valid or not (eg, because cancellable is triggered before it completes) then the return value will be Gio.TlsCertificateFlags.GENERIC_ERROR and error will be set accordingly. error is not set when chain is successfully analyzed but found to be invalid.

New in version 2.30.