https://robinmoisson.github.io/staticrypt/ or https://github.com/robinmoisson/staticrypt/
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<!doctype html>
<style>
.staticrypt-hr {
margin-top: 20px;
margin-bottom: 20px;
border: 0;
border-top: 1px solid #eee;
}
.staticrypt-page {
width: 360px;
padding: 8% 0 0;
margin: auto;
box-sizing: border-box;
}
.staticrypt-form {
position: relative;
z-index: 1;
background: #FFFFFF;
max-width: 360px;
margin: 0 auto 100px;
padding: 45px;
text-align: center;
box-shadow: 0 0 20px 0 rgba(0, 0, 0, 0.2), 0 5px 5px 0 rgba(0, 0, 0, 0.24);
}
.staticrypt-form input {
outline: 0;
background: #f2f2f2;
width: 100%;
border: 0;
margin: 0 0 15px;
padding: 15px;
box-sizing: border-box;
font-size: 14px;
}
.staticrypt-form .staticrypt-decrypt-button {
text-transform: uppercase;
outline: 0;
background: #4CAF50;
width: 100%;
border: 0;
padding: 15px;
color: #FFFFFF;
font-size: 14px;
}
.staticrypt-form .staticrypt-decrypt-button:hover, .staticrypt-form .staticrypt-decrypt-button:active, .staticrypt-form .staticrypt-decrypt-button:focus {
background: #43A047;
}
.staticrypt-html {
height: 100%;
}
.staticrypt-body {
margin-bottom: 1em;
background: #76b852; /* fallback for old browsers */
background: -webkit-linear-gradient(right, #76b852, #8DC26F);
background: -moz-linear-gradient(right, #76b852, #8DC26F);
background: -o-linear-gradient(right, #76b852, #8DC26F);
background: linear-gradient(to left, #76b852, #8DC26F);
font-family: "Arial", sans-serif;
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
}
.staticrypt-instructions {
margin-top: -1em;
margin-bottom: 1em;
}
.staticrypt-title {
font-size: 1.5em;
}
.staticrypt-footer {
position: fixed;
height: 20px;
font-size: 16px;
padding: 2px;
bottom: 0;
left: 0;
right: 0;
margin-bottom: 0;
}
.staticrypt-footer p {
margin: 2px;
text-align: center;
float: right;
}
</style>
<div class="staticrypt-page">
<div class="staticrypt-form">
<div class="staticrypt-instructions">
Protected Page
</div>
* * *
<form id="staticrypt-form" action="#" method="post">
<input id="staticrypt-password" type="password" name="password" placeholder="passphrase">
<input type="submit" class="staticrypt-decrypt-button" value="DECRYPT">
</form>
</div>
</div>
<footer class="staticrypt-footer">
Created with [StatiCrypt](https://robinmoisson.github.io/staticrypt)
</footer>
$(function () {
$('#staticrypt-form').submit(function (e) {
e.preventDefault();
var passphrase = $('#staticrypt-password').val();
var encryptedMsg = 'fcabc9486d1502eda51566d1e88493a5b2e822e8799f7e32b5514dfb59003cc5U2FsdGVkX19U3/e+wlbpIlV5mLzY39A1ftqYUGgdE/E=';
var encryptedHMAC = encryptedMsg.substring(0, 64);
var encryptedHTML = encryptedMsg.substring(64);
var decryptedHMAC = CryptoJS.HmacSHA256(encryptedHTML, CryptoJS.SHA256(passphrase)).toString();
if (decryptedHMAC !== encryptedHMAC) {
alert('Bad passphrase !');
return;
}
var plainHTML = CryptoJS.AES.decrypt(encryptedHTML, passphrase).toString(CryptoJS.enc.Utf8);
document.write(plainHTML);
});
});
origin - http://www.pipiscrew.com/?p=8483 password-protect-a-static-html-page