Ringzer0 - Java Script - Hashing is more secure

Ringzer0 - Java Script - Hashing is more secure

Objective:   Get that Flag

Solution:

So this is another javascript challenge so I started with the source code again

found this code

	<script>
	// Look's like weak JavaScript auth script :)
	$(".c_submit").click(function(event) {
	event.preventDefault();
	var p = $("#cpass").val();
	if(Sha1.hash(p) == "b89356ff6151527e89c4f3e3d30c8e6586c63962") {
	if(document.location.href.indexOf("?p=") == -1) {
	document.location = document.location.href + "?p=" + p;
	}
	} else {
	$("#cresponse").html("<div class='alert alert-danger'>Wrong password sorry.</div>");
	}
	});
	</script>

So this time the are checking the password supplied against a hashed value of the password

  if(Sha1.hash(p) == "b89356ff6151527e89c4f3e3d30c8e6586c63962 

so its taking a sha1 of what is supplied and checking it against this hash

so we just need to decrypt the sha1 its comparing against to get the flag

https://md5hashing.net/hash/sha1/b89356ff6151527e89c4f3e3d30c8e6586c63962 

adminz

let's plug it in and see if we are right

we got the flag 

FLAG-bXNsYg9tLCaIX6h1UiQMmMYB