CryptoJS Files · dist/crypto.html

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Laman

FIX: unstretched password leaking through signature

<!DOCTYPE html>
<html>
<head>
	<meta charset="utf-8" />
	<title>Chacha20</title>
	<style type="text/css">
		textarea{width:400px;height:160px;}
		form[name="chacha"] > *, form[name="chacha"] label > * {display:block;margin-bottom:8px;}
	</style>
	<script type="text/javascript" src="main.js"></script>
</head>
<body>
	<form name="chacha">
		<label>Vstup:
			<textarea name="input"></textarea>
		</label>
		<label>Heslo:
			<input type="password" name="password" />
		</label>
		<div>
			<button type="button" name="encrypt">zašifrovat</button>
			<button type="button" name="decrypt">dešifrovat</button>
		</div>
		<label>Výstup:
			<textarea name="output" readonly></textarea>
		</label>
	</form>
	
	<script type="text/javascript">
		let form=document.querySelector("form[name='chacha']");
		let input=form.querySelector("textarea[name='input']");
		let output=form.querySelector("textarea[name='output']");
		let password=form.querySelector("input[name='password']");
		
		form.querySelector("button[name='encrypt']").addEventListener("click",function(){
			output.value=cryptoJS.encrypt(input.value,password.value);
		});
		
		form.querySelector("button[name='decrypt']").addEventListener("click",function(){
			let res=cryptoJS.decrypt(input.value,password.value);
			if(res===1){res="! Nepodařilo se ověřit pravost zprávy. !";}
			else if(res===2){res="! Nekompatibilní verze programu. !";}
			output.value=res;
		});
	</script>
</body>
</html>