Re: [Firebird-devel] Suppress database encryption callback
> 13.04.2018 17:01, Mark Rotteveel wrote:
> > Let me rephrase: exactly what causes Firebird to perform a callback to the
> > client, and
> > what must a KeyHolderPlugin do to make sure no callback is performed.
>
>Firebird calls client callback when key holder in keyCallback() calls the
> callback
> received in parameters.
>If the holder don't call the callback - no callback is performed.
>
>Code example:
>
> int KeyHolderSample::keyCallback(CheckStatusWrapper* status,
> ICryptKeyCallback* callback)
> {
> // Here Firebird will send callback request to client
> // Comment this line out to disable client callback
> return callback->callback(0, NULL, sizeof(Buffer), Buffer);
> }
S in theory, you could put an if scenario around that...
i.e. if KeyFile no callback
if Callback, callback?
Correct?
Regards
Paul
--
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
Firebird-Devel mailing list, web interface at
https://lists.sourceforge.net/lists/listinfo/firebird-devel
Re: [Firebird-devel] Suppress database encryption callback
13.04.2018 17:01, Mark Rotteveel wrote:
Let me rephrase: exactly what causes Firebird to perform a callback to the client, and
what must a KeyHolderPlugin do to make sure no callback is performed.
Firebird calls client callback when key holder in keyCallback() calls the callback
received in parameters.
If the holder don't call the callback - no callback is performed.
Code example:
int KeyHolderSample::keyCallback(CheckStatusWrapper* status, ICryptKeyCallback*
callback)
{
// Here Firebird will send callback request to client
// Comment this line out to disable client callback
return callback->callback(0, NULL, sizeof(Buffer), Buffer);
}
--
WBR, SD.
--
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
Firebird-Devel mailing list, web interface at
https://lists.sourceforge.net/lists/listinfo/firebird-devel
Re: [Firebird-devel] Suppress database encryption callback
On 13-4-2018 16:56, Dimitry Sibiryakov wrote: 13.04.2018 16:47, Mark Rotteveel wrote: The person reporting the problem indicates a different plugin did not have this problem, which would indicate there is a way to suppress the callback. What does the plugin need to do to not perform a callback? It must be a plugin that never call the callback. Key holder plugin has no information at hand to decide if it must call the callback or must not to, so there are plugins that call it unconditionally and plugins that never call it. Of course, it is also possible to create a plugin with configurable setting "disable callback", but such setting has no practical use. Let me rephrase: exactly what causes Firebird to perform a callback to the client, and what must a KeyHolderPlugin do to make sure no callback is performed. Mark -- Mark Rotteveel -- Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot Firebird-Devel mailing list, web interface at https://lists.sourceforge.net/lists/listinfo/firebird-devel
Re: [Firebird-devel] Suppress database encryption callback
13.04.2018 16:47, Mark Rotteveel wrote: The person reporting the problem indicates a different plugin did not have this problem, which would indicate there is a way to suppress the callback. What does the plugin need to do to not perform a callback? It must be a plugin that never call the callback. Key holder plugin has no information at hand to decide if it must call the callback or must not to, so there are plugins that call it unconditionally and plugins that never call it. Of course, it is also possible to create a plugin with configurable setting "disable callback", but such setting has no practical use. -- WBR, SD. -- Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot Firebird-Devel mailing list, web interface at https://lists.sourceforge.net/lists/listinfo/firebird-devel
[Firebird-devel] Suppress database encryption callback
I'm currently looking at a problem with Jaybird (which doesn't support the callback) and a plugin that performs the callback when I think it shouldn't. If I modify Jaybird to send an empty buffer in response, it works fine. The person reporting the problem indicates a different plugin did not have this problem, which would indicate there is a way to suppress the callback. What does the plugin need to do to not perform a callback? -- Mark Rotteveel -- Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot Firebird-Devel mailing list, web interface at https://lists.sourceforge.net/lists/listinfo/firebird-devel
