使用CryptoJS更改密钥
使用CryptoJS更改密钥
提问于 2016-06-10 16:14:07
我正在使用CryptoJS对文本进行加密和解密。在这里，我只是获取消息并显示加密和解密消息。
我正在使用DES算法进行加密和解密。
这是我的HTML文件
<!DOCTYPE html>
<html>
<head>
<script src="tripledes.js"></script>
<script src="mode-ecb.js"></script>
<style type="text/css">
.maindiv {
/* Just to center the form on the page */
margin: 0 auto;
width: 400px;
/* To see the outline of the form */
padding: 1em;
border: 1px solid #CCC;
border-radius: 1em;
}
div + div {
margin-top: 1em;
}
label {
/* To make sure that all labels have the same size and are properly aligned */
display: inline-block;
width: 90px;
text-align: right;
}
.button {
/* To position the buttons to the same position of the text fields */
padding-left: 90px; /* same size as the label elements */
}
button {
/* This extra margin represent roughly the same space as the space
between the labels and their text fields */
margin-left: .5em;
}
input:focus, textarea:focus {
/* To give a little highlight on active elements */
border-color: #000;
}
input, textarea {
/* To make sure that all text fields have the same font settings
By default, textareas have a monospace font */
font: 1em sans-serif;
/* To give the same size to all text field */
width: 300px;
-moz-box-sizing: border-box;
box-sizing: border-box;
/* To harmonize the look & feel of text field border */
border: 1px solid #999;
}
</style>
<script type="text/javascript">
function viewvalue()
{
var message = document.getElementById("msg").value;
var key = document.getElementById("key").value;
var encrypted = encryptByDES(message, key);
document.getElementById("enctext").textContent = encrypted;
document.getElementById("dectxt").textContent = decryptByDES(encrypted, key);;
}
function encryptByDES(message, key) {
var keyHex = CryptoJS.enc.Utf8.parse(key);
var encrypted = CryptoJS.DES.encrypt(message, keyHex, {
mode: CryptoJS.mode.ECB,
padding: CryptoJS.pad.Pkcs7
});
return encrypted.toString();
}
function decryptByDES(ciphertext, key) {
var keyHex = CryptoJS.enc.Utf8.parse(key);
var decrypted = CryptoJS.DES.decrypt({
ciphertext: CryptoJS.enc.Base64.parse(ciphertext)
}, keyHex, {
mode: CryptoJS.mode.ECB,
padding: CryptoJS.pad.Pkcs7
});
return decrypted.toString(CryptoJS.enc.Utf8);
}
</script>
</head>
<body>
<div class="maindiv">
<div>
<label for="name">Message:</label>
<input type="text" id="msg" name="msg" />
</div>
<div>
<label for="mail">Key:</label>
<input type="text" id="key" name="key" />
</div>
<div>
<label for="msg">Encrypted Text:</label>
<textarea id="enctext" name="enctxt"></textarea>
</div>
<div>
<label for="msg">Decrypted Text:</label>
<textarea id="dectxt" name="dectxt"></textarea>
</div>
<div class="button">
<button onclick="viewvalue()">View</button>
</div>
</div>
</body>
</html>这是我的.js文件
/*
CryptoJS v3.1.2
code.google.com/p/crypto-js
(c) 2009-2013 by Jeff Mott. All rights reserved.
code.google.com/p/crypto-js/wiki/License
*/
/**
* Electronic Codebook block mode.
*/
CryptoJS.mode.ECB = (function () {
var ECB = CryptoJS.lib.BlockCipherMode.extend();
ECB.Encryptor = ECB.extend({
processBlock: function (words, offset) {
this._cipher.encryptBlock(words, offset);
}
});
ECB.Decryptor = ECB.extend({
processBlock: function (words, offset) {
this._cipher.decryptBlock(words, offset);
}
});
return ECB;
}());请任何人都可以告诉我在哪里以及如何更换钥匙。
回答 1
Stack Overflow用户
发布于 2016-06-10 16:21:40
根据https://code.google.com/archive/p/crypto-js/#Custom_Key_and_IV的文档，如果您希望提供自定义密钥，则需要定义并提供初始化向量(IV)和密钥：
var key = CryptoJS.enc.Hex.parse('000102030405060708090a0b0c0d0e0f');
var iv = CryptoJS.enc.Hex.parse('101112131415161718191a1b1c1d1e1f');
var encrypted = CryptoJS.AES.encrypt("Message", key, { iv: iv });页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/37743218
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