com.identityx.clientSDK.piiSupport.FidoRequestUtil Maven / Gradle / Ivy

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package com.identityx.clientSDK.piiSupport;

import java.io.StringWriter;

import com.google.gson.Gson;
import com.google.gson.JsonArray;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.stream.JsonWriter;
import com.identityx.clientSDK.piiSupport.transactionContentProviders.ITransactionContentProvider;

public class FidoRequestUtil {

		
	/*
	 * Parses the fidoAuthenticationRequest string and provides the required content
	 */
	public String replaceTransactionContent(String fidoAuthRequestJson, ITransactionContentProvider[] transactionContentProviders) {
		
		StringWriter mjson = new StringWriter();		
		JsonWriter jsonWriter = new JsonWriter(mjson);
		Gson gson = new Gson();
		Object data = gson.fromJson(fidoAuthRequestJson, Object.class);
		
	    JsonArray jsonArray = (JsonArray) gson.toJsonTree(data);
	    for (JsonElement ielement : jsonArray) {
	    	JsonObject iobject = ielement.getAsJsonObject();
	    	JsonElement transactionElement = iobject.get("transaction");
		    JsonArray iarray = transactionElement.getAsJsonArray();
		    for (JsonElement jelement : iarray) {
		    	JsonObject transObj = jelement.getAsJsonObject();
		    	JsonElement contentTypeElem = transObj.get("contentType");
		    	for (ITransactionContentProvider transactionContentProvider : transactionContentProviders) {
		    		if (transactionContentProvider.isContentTypeSupported(contentTypeElem.getAsString())) {
				    	JsonElement tcDisplayElem = transObj.get("tcDisplayPNGCharacteristics");
				    	if (tcDisplayElem != null) {
				    		JsonObject dcObj = tcDisplayElem.getAsJsonObject();
				    		DisplayPNGCharacteristics display = gson.fromJson(dcObj, DisplayPNGCharacteristics.class);
				    				    		
				    		String base64Image = transactionContentProvider.getContent(display);
				    		transObj.addProperty("content", base64Image);
				    	}
				    	else {
				    		transObj.addProperty("content", transactionContentProvider.getContent());
				    	}		    			    			
		    		}
		    	}
		    }
	    }
	    	    
		gson.toJson(jsonArray, jsonWriter);
		return mjson.toString();
	}
	
	
	/*
	 * Replaces the username in the fidoRegistrationRequest
	 */
	public String replaceUsername(String fidoRegRequestJson, String newUsername) {
		
		StringWriter mjson = new StringWriter();		
		JsonWriter jsonWriter = new JsonWriter(mjson);
		Gson gson = new Gson();
		Object data = gson.fromJson(fidoRegRequestJson, Object.class);
		
	    JsonArray jsonArray = (JsonArray) gson.toJsonTree(data);
	    for (JsonElement ielement : jsonArray) {
	    	JsonObject iobject = ielement.getAsJsonObject();
	    	iobject.addProperty("username", newUsername);
	    }
	    	    
		gson.toJson(jsonArray, jsonWriter);
		return mjson.toString();
	}
	
}