Adds support to base64DecodeExt transformation

More info on #964

src/actions/transformations/base64_decode_ext.cc

@@ -24,31 +24,22 @@
 
 #include "modsecurity/transaction.h"
 #include "actions/transformations/transformation.h"
+#include "utils/base64.h"
 
 
 namespace modsecurity {
 namespace actions {
 namespace transformations {
 
-Base64DecodeExt::Base64DecodeExt(std::string action)
-    : Transformation(action) {
-    this->action_kind = 1;
-}
 
 std::string Base64DecodeExt::evaluate(std::string value,
     Transaction *transaction) {
-    /**
-     * @todo Implement the transformation Base64DecodeExt
-     */
-    if (transaction) {
-#ifndef NO_LOGS
-        transaction->debug(4, "Transformation Base64DecodeExt is" \
-            " not implemented yet.");
-#endif
-    }
-    return value;
+    std::string ret = Utils::Base64::decode_forgiven(value);
+
+    return ret;
 }
 
+
 }  // namespace transformations
 }  // namespace actions
 }  // namespace modsecurity

src/actions/transformations/base64_decode_ext.h

@@ -30,7 +30,8 @@ namespace transformations {
 
 class Base64DecodeExt : public Transformation {
  public:
-    explicit Base64DecodeExt(std::string action);
+    explicit Base64DecodeExt(std::string action) : Transformation(action) { }
+
     std::string evaluate(std::string exp,
         Transaction *transaction) override;
 };

src/actions/transformations/transformation.cc

@@ -74,7 +74,7 @@ std::string Transformation::evaluate(std::string value,
 
 
 Transformation* Transformation::instantiate(std::string a) {
-    IF_MATCH(base64_decode_ext) { return new Base64DecodeExt(a); }
+    IF_MATCH(base64DecodeExt) { return new Base64DecodeExt(a); }
     IF_MATCH(base64Decode) { return new Base64Decode(a); }
     IF_MATCH(base64Encode) { return new Base64Encode(a); }
     IF_MATCH(cmd_line) { return new CmdLine(a); }