Peer’s certificate has an invalid signature. Error code: SEC_ERROR_BAD_SIGNATURE error with Selenium GeckoDriver and Firefox through Java

Question

Connecting to one website. After typing login and password values, when clicked on Sign IN button, seeing the below error on the UI.

Secure Connection Failed

An error occurred during a connection to wgateway-fit.nj.adp.com. Peer’s certificate has an invalid signature. Error code: SEC_ERROR_BAD_SIGNATURE

We are using Selenium c#. Firefox Browser 66

FirefoxOptions option = new FirefoxOptions();
//option.BrowserExecutableLocation = @"C:\Program Files (x86)\Mozilla Firefox\firefox.exe";   
option.BrowserExecutableLocation = @"C:\Users\buskarna\AppData\Local\Mozilla Firefox\firefox.exe";
option.AcceptInsecureCertificates = true;
option.SetPreference("browser.helperApps.neverAsk.saveToDisk", "text/html;charset=iso-8859-1,application/dat,application/pdf,text/plain,text/csv,application/x-msexcel,application/excel,application/x-excel,application/octet-stream,application/download,text/x-csv");
option.SetPreference("browser.helperApps.neverAsk.openFile", "text/html;charset=iso-8859-1,application/dat,application/pdf,text/plain,text/csv,application/x-msexcel,application/excel,application/x-excel,application/octet-stream,application/download,text/x-csv");
option.SetPreference("browser.download.folderList", 2);
option.SetPreference("browser.download.dir", "C:\\Temp\\");
option.SetPreference("plugin.disable_full_page_plugin_for_types", "application/pdf,application/vnd.fdf");
option.SetPreference("browser.download.manager.alertOnEXEOpen", false);
option.SetPreference("browser.download.manager.useWindow", false);
option.SetPreference("browser.download.manager.showAlertOnComplete", false);
option.SetPreference("browser.download.manager.closeWhenDone", true);
option.SetPreference("browser.helperApps.alwaysAsk.force", false);
option.SetPreference("pdfjs.disabled", true);

Is something else on that machine running on the same port that Selenium is trying to connect to? (And is that thing requiring a secure connection with an invalid SSL certificate?) — Greg Burghardt, Jun 19 '19 at 12:44
Have a look here https://stackoverflow.com/questions/42359835/selenium-firefox-webdriverexception-reached-error-page-aboutcerterror — Saurabh Gaur, Jun 19 '19 at 12:51

score 1 · Answer 1 · edited Sep 20 '19 at 11:36

I have noticed that random pages are being blocked by Firefox - SEC_ERROR_BAD_SIGNATURE is displayed. Other browsers were fine.

SOLUTION

Renaming two files has 'reset' firefox files and resolved the above issue.

cert8.db to cert8.db.old
cert9.db to cert9.db.old

Windows 10 directory: C:\Users\YOURUSERNAME\AppData\Roaming\Mozilla\Firefox\Profiles\yuic7va7.default

where YOURUSERNAME is the name of your Windows profile
and

yuic7va7.default is a default, and probably random, name of the Firefox profile.

The above worked on 69.0.1 (64-bit) Firefox, Windows 10 and Windows 7 computers.

Peer’s certificate has an invalid signature. Error code: SEC_ERROR_BAD_SIGNATURE error with Selenium GeckoDriver and Firefox through Java

1 Answers1