[BUGFIX] Simulate submit button for rsaauth form submit

This patch adds the name and value of the first submit button found in a
form to the input field used to send the form.

Resolves: #76120
Releases: master, 8.7, 7.6
Change-Id: I3f0fdc7e933267689114d5bcf62d3fcfe2db5146
Reviewed-on: https://review.typo3.org/56088
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>
Tested-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>

typo3/sysext/rsaauth/Resources/Public/JavaScript/RsaEncryption.js

@@ -111,15 +111,12 @@
       }
 
       // Submit the form again but now with encrypted values
-      var form = document.createElement('form');
-      if (form.submit.call) {
-        form.submit.call(rsaEncryption.form);
-      } else {
-        for (var j = rsaEncryption.form.elements.length; j--;) {
-          var submitField = rsaEncryption.form.elements[j];
-          if (submitField.nodeName.toLowerCase() === 'input' && submitField.type === "submit") {
-            submitField.click();
-          }
+      for (var j = rsaEncryption.form.elements.length; j--;) {
+        var submitField = rsaEncryption.form.elements[j];
+        if ((['input', 'button'].indexOf(submitField.nodeName.toLowerCase()) > -1)
+          && (['submit', 'image', 'button'].indexOf(submitField.type.toLowerCase()) > -1)
+        ) {
+          submitField.click();
         }
       }
     };

typo3/sysext/rsaauth/Resources/Public/JavaScript/RsaEncryptionModule.js

@@ -118,12 +118,22 @@ define(['jquery', './RsaLibrary'], function($) {
       });
 
       // Try to fetch the field which submitted the form
-      var $currentField = RsaEncryption.$currentForm.find('input[type=submit]:focus,input[type=image]:focus');
+      var $currentField = RsaEncryption.$currentForm.find('input[type=submit]:focus,input[type=image]:focus,button:focus');
       if ($currentField.length === 1) {
         $currentField.trigger('click');
       } else {
         // Create a hidden input field to fake pressing the submit button
-        RsaEncryption.$currentForm.append('<input type="hidden" name="commandLI" value="Submit">');
+        var name = 'commandLI',
+          value = 'Submit';
+        var $submitField = RsaEncryption.$currentForm.find('input[type=submit],input[type=image],input[type=button],button[name][type=submit]').first();
+        if ($submitField.length === 1) {
+          name = $submitField.attr('name') || name;
+          value = $submitField.attr('value') || value ;
+        }
+        var $hiddenField = $('<input type="hidden">')
+          .attr('name', name)
+          .val(value);
+        RsaEncryption.$currentForm.append($hiddenField);
 
         // Restore the original submit handler
         var originalOnSubmit = RsaEncryption.$currentForm.data('original-onsubmit');