And onReceivedSslError would cover the self-signed scenario, but it wouldn't 
cover the real pinning scenario with a properly signed cert, because it gets 
invoked only on a handshake failure, not a handshake success.

On Jan 14, 2014, at 11:38 AM, Marcel Kinard <cmarc...@gmail.com> wrote:

> I've played with that recently, and it may do most of what you want. 
> 
> The method CordovaWebViewClient.onReceivedSslError does get called when 
> attempting an SSL handshake with a server that has a self-signed cert. I 
> tested this using <a href> and window.open(_self).
> 
> When setting the app to debuggable=true in AndroidManifest.xml, the 
> onReceivedSslError() method will treat this as a special case, and basically 
> ignore the SSL error by always calling SslErrorHandler.proceed(). Once 
> proceed() has been called, subsequent SSL connections to that server will not 
> result in onReceivedSslError() getting called - once that self-signed cert 
> has been accepted, subsequent requests are considered accepted also. This 
> "acceptance" is persistent only for the duration of a single application 
> execution - if the application is restarted, it forgets the acceptance. 
> According to the docs, WebView.clearSslPreferences() might reset that.
> 
> When using debuggable=false, it takes a different path in 
> onReceivedSslError() and it doesn't eat the error, and the connection fails. 
> I think at this point what you'd want to do is inspect the cert to see if it 
> matches what you want, and then call proceed() if it is good. However, I 
> think the last sticking point (from what I see in the javadocs) is that 
> although you are handed an SslCertificate object in onReceivedSslError, the 
> methods on SslCertificate will get you only the human-readable info (self DN, 
> issuer DN, valid date) and not the actual public key. So all you can check is 
> the DN, which I don't think is good enough. I don't see a way to work around 
> that by getting the raw pem or similar.
> 
> On Jan 14, 2014, at 10:42 AM, Andrew Grieve <agri...@chromium.org> wrote:
> 
>> Actually, looking again, there's a custom API just for SSL certs that
>> will provide you the cert to check: onReceivedSslError().
> 

Reply via email to