Bug 1412213 - Content-Type MIME-header - Skipping a parameter without an '='. r=mayhemer

netwerk/mime/nsMIMEHeaderParamImpl.cpp

@@ -470,10 +470,12 @@ nsMIMEHeaderParamImpl::DoParameterInternal(const char *aHeaderValue,
     if (!*str) {
       break;
     }
-    if (*str++ != '=') {
+    if (*str != '=') {
       // don't accept parameters without "="
       goto increment_str;
     }
+    // Skip over '=' only if it was actually there
+    str++;
     while (nsCRT::IsAsciiSpace(*str)) ++str;
 
     if (*str != '"') {

netwerk/test/unit/test_MIME_params.js

@@ -432,6 +432,14 @@ var tests = [
   // Bug 783502 - xpcshell test netwerk/test/unit/test_MIME_params.js fails on AddressSanitizer
   ['attachment; filename="\\b\\a\\', 
    "attachment", "ba\\"], 
+
+  // Bug 1412213 - do continue to parse, behind an empty parameter
+  ['attachment; ; filename=foo',
+   "attachment", "foo"],
+
+  // Bug 1412213 - do continue to parse, behind a parameter w/o =
+  ['attachment; badparameter; filename=foo',
+   "attachment", "foo"],
 ];
 
 var rfc5987paramtests = [