Fix case sensitive variable resolution in in memory backend

Variables are case insensitive

src/collection/backend/in_memory-per_process.cc

@@ -99,7 +99,9 @@ void InMemoryPerProcess::resolveMultiMatches(const std::string& var,
         if (x.first.at(keySize) != ':') {
             continue;
         }
-        if (x.first.compare(0, keySize, var) != 0) {
+        std::string fu = toupper(x.first);
+        std::string fvar = toupper(var);
+        if (fu.compare(0, keySize, fvar) != 0) {
             continue;
         }
         l->insert(l->begin(), new Variable(x.first, x.second));

src/collection/backend/in_memory-per_process.h

@@ -59,7 +59,7 @@ struct MyHash{
         // You might need a better hash function than this
         size_t h = 0;
         std::for_each(Keyval.begin(), Keyval.end(), [&](char c) {
-            h += c;
+            h += tolower(c);
         });
         return h;
     }

test/test-cases/regression/collection-case-insensitive.json

@@ -0,0 +1,62 @@
+[
+  {
+    "enabled":1,
+    "version_min":300000,
+    "version_max":0,
+    "title":"Testing collection :: Case insensitive (1/1)",
+    "client":{  
+      "ip":"200.249.12.31",
+      "port":2313
+    },
+    "server":{  
+      "ip":"200.249.12.31",
+      "port":80
+    },
+    "request":{  
+      "headers":{  
+        "User-Agent":"Mozilla\/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.1.5) Gecko\/20091102 Firefox\/3.5.5 (.NET CLR 3.5.30729)",
+        "Accept":"text\/html,application\/xhtml+xml,application\/xml;q=0.9,*\/*;q=0.8",
+        "Accept-Language":"en-us,en;q=0.5",
+        "Accept-Encoding":"gzip,deflate",
+        "Accept-Charset":"ISO-8859-1,utf-8;q=0.7,*;q=0.7",
+        "Keep-Alive":"300",
+        "Connection":"keep-alive",
+        "Cookie":"PHPSESSID=rAAAAAAA2t5uvjq435r4q7ib3vtdjq120",
+        "Pragma":"no-cache",
+        "Cache-Control":"no-cache"
+      },
+      "uri":"\/test.pl?param1=   test   &param2=test2",
+      "method":"GET",
+      "http_version":1.1,
+      "body":""
+    },
+    "response":{  
+      "headers":{  
+        "Content-Type":"text\/xml; charset=utf-8\n\r",
+        "Content-Length":"length\n\r"
+      },
+      "body":[  
+        "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n\r",
+        "<soap:Envelope xmlns:xsi=\"http:\/\/www.w3.org\/2001\/XMLSchema-instance\" xmlns:xsd=\"http:\/\/www.w3.org\/2001\/XMLSchema\" xmlns:soap=\"http:\/\/schemas.xmlsoap.org\/soap\/envelope\/\">\n\r",
+        "  <soap:Body>\n\r",
+        "  <EnlightenResponse xmlns=\"http:\/\/clearforest.com\/\">\n\r",
+        "  <EnlightenResult>string<\/EnlightenResult>\n\r",
+        "  <\/EnlightenResponse>\n\r",
+        "  <\/soap:Body>\n\r",
+        "<\/soap:Envelope>\n\r"
+      ]
+    },
+    "expected":{  
+      "audit_log":"",
+      "debug_log":"Target value: \"matched_var:PHPSESSID=rAAAAAAA2t5uvjq435r4q7ib3vtdjq120\" \\(Variable: TX:something\\)",
+      "error_log":""
+    },
+    "rules":[  
+      "SecRuleEngine On",
+      "SecDebugLog \/tmp\/modsec_debug.log",
+      "SecDebugLogLevel 9",
+      "SecRule REQUEST_headers \"@contains PHPSESSID\" \"id:1,t:lowercase,t:none,setvar:TX.something=matched_var:%{matched_var}%\"",
+      "SecRule TX \"@contains to_test\" \"id:2,t:lowercase,t:none\""
+    ]
+  }
+]