test_this.html

<html>
<body>
	<h1>Lab 9 Demo 1</h1>

	<h3>Step 1: message</h3>
	<input name="message" id="message" type="text" >
	<br/><br/>
	<button type="button" onclick="hash()">Hash</button>
	<br/><br/>
	<p name="hash_value" id="hash_value"></p>

	<h3>Step 2: timestamp</h3>
	<h3>Current Time: The Current Unix Timestamp since Jan 01 1970. (UTC)</h3>
	<button type="button" onclick="getTime()">Get current time in second</button>
	<br/><br/>
	<p name="currentTime" id="currentTime"></p>
	
	<h3>Step 3: RSA encryption</h3>
	<h3>Encrypted (the message + "&" the timestamp) together</h3>
	<button type="button" onclick="encryption()">encrypt</button>
	<br/><br/>
	<p name="encrypted" id="encrypted"></p>
	
	
	<h3>Step 4: RSA decryption</h3>
	<h3>Decrypt the ciphertext</h3>
	<button type="button" onclick="decryption()">decrypt</button>
	<br/><br/>
	<p name="decrypted" id="decrypted"></p>
	
	<h3>Step 5: Split decrypted value based on "&"</h3>
	<h3>Decrypt the ciphertext</h3>
	<button type="button" onclick="split_string()">split</button>
	<br/><br/>
	<p name="split1" id="split1"></p>
	<p name="split2" id="split2"></p>

	
	
	
	
	<script src="sha256.js"></script>
	<script src="rsa.js"></script>
	<script type="text/javascript">
		function hash() {
			var input = document.getElementById('message').value;
			
			var hash = SHA256.hash(input);

			document.getElementById('hash_value').innerHTML = hash;
			document.getElementById('hash_value').value = hash;
		}
		
		function getTime() {
			
			//get current time in Second since Jan 01 1970. (UTC)
			var currentTime = Math.floor(new Date().getTime() / 1000);

			document.getElementById('currentTime').innerHTML = currentTime;
			document.getElementById('currentTime').value = currentTime;
		}
		
		function encryption(){
		
			var hashed_value = document.getElementById('hash_value').value;
			var timestamp = document.getElementById('currentTime').value;
		
			var ciphertext = RSA_encryption(hashed_value+"&"+timestamp, pubilc_key);
		
			document.getElementById('encrypted').innerHTML = ciphertext;
			document.getElementById('encrypted').value = ciphertext;
		}
		
		function decryption(){
		
			var encrypted = document.getElementById('encrypted').value;
		
			var decrypted = RSA_decryption(encrypted, private_key);
		
			document.getElementById('decrypted').innerHTML = decrypted;
			document.getElementById('decrypted').value = decrypted;
		}
		
		
		function split_string(){
		
			var string = document.getElementById('decrypted').value;
		
			var split = string.split("&");
		
			document.getElementById('split1').innerHTML = split[0];
			document.getElementById('split1').value = split[0];
			
			document.getElementById('split2').innerHTML = split[1];
			document.getElementById('split2').value = split[1];
		}
		
		
	</script>
	
	<script type="text/javascript">	
		
		var pubilc_key = "-----BEGIN PUBLIC KEY-----MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAzdxaei6bt/xIAhYsdFdW62CGTpRX+GXoZkzqvbf5oOxw4wKENjFX7LsqZXxdFfoRxEwH90zZHLHgsNFzXe3JqiRabIDcNZmKS2F0A7+Mwrx6K2fZ5b7E2fSLFbC7FsvL22mN0KNAp35tdADpl4lKqNFuF7NT22ZBp/X3ncod8cDvMb9tl0hiQ1hJv0H8My/31w+F+Cdat/9Ja5d1ztOOYIx1mZ2FD2m2M33/BgGY/BusUKqSk9W91Eh99+tHS5oTvE8CI8g7pvhQteqmVgBbJOa73eQhZfOQJ0aWQ5m2i0NUPcmwvGDzURXTKW+72UKDz671bE7YAch2H+U7UQeawwIDAQAB-----END PUBLIC KEY-----";
		var private_key = "-----BEGIN PRIVATE KEY-----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-----END PRIVATE KEY-----";
				
		
		function RSA_encryption(message, publicKey){

			var encrypt = new JSEncrypt();
			encrypt.setPublicKey(publicKey);
			var encrypted = encrypt.encrypt(message);
		  
			return encrypted;	
		}
	
		function RSA_decryption(ciphertext, privateKey){

			var decrypt = new JSEncrypt();
			decrypt.setPrivateKey(privateKey);
			var decrypted = decrypt.decrypt(ciphertext);
			  
			return decrypted;
		}
		
	</script>

</body>
</html>