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javascript - 用 PHP 加密,用 Javascript 解密(cryptojs)

转载 作者:IT王子 更新时间:2023-10-29 01:14:55 26 4
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我在基本加密/解密方面遇到问题。我到处寻找一个工作示例,但还没有找到一个工作示例。

-我将在 php 中进行加密,使用 cryptojs 进行解密以实现一小层安全

<script src="http://crypto-js.googlecode.com/svn/tags/3.1.2/build/rollups/aes.js">
<?
$text = "this is the text here";
$key = "encryptionkey";

$msgEncrypted = mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $key, $text, MCRYPT_MODE_CBC, mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB), MCRYPT_RAND));
$msgBase64 = trim(base64_encode($msgEncrypted));

echo "<h2>PHP</h2>";
echo "<p>Encrypted:</p>";
echo $msgEncrypted;
echo "<p>Base64:</p>";
echo $msgBase64;
?>

<p>AES Decrypt</p>
<script>
var key = 'encryptionkey';
var encrypted = "<?php echo $msgBase64 ?>";
//tried var base64decode = CryptoJS.enc.Base64.parse(encrypted);
var decrypted = CryptoJS.AES.decrypt(encrypted, key);
console.log( decrypted.toString(CryptoJS.enc.Utf8) );
</script>

我错过了哪一步?

最佳答案

我需要同样的东西,我写了一个简短的库,适用于 CryptoJS 3.x 和支持 openssl 的 PHP。希望这会有所帮助,此处提供源代码和示例文件 https://github.com/brainfoolong/cryptojs-aes-php

PHP 库

/**
* Decrypt data from a CryptoJS json encoding string
*
* @param mixed $passphrase
* @param mixed $jsonString
* @return mixed
*/
function cryptoJsAesDecrypt($passphrase, $jsonString){
$jsondata = json_decode($jsonString, true);
$salt = hex2bin($jsondata["s"]);
$ct = base64_decode($jsondata["ct"]);
$iv = hex2bin($jsondata["iv"]);
$concatedPassphrase = $passphrase.$salt;
$md5 = array();
$md5[0] = md5($concatedPassphrase, true);
$result = $md5[0];
for ($i = 1; $i < 3; $i++) {
$md5[$i] = md5($md5[$i - 1].$concatedPassphrase, true);
$result .= $md5[$i];
}
$key = substr($result, 0, 32);
$data = openssl_decrypt($ct, 'aes-256-cbc', $key, true, $iv);
return json_decode($data, true);
}

/**
* Encrypt value to a cryptojs compatiable json encoding string
*
* @param mixed $passphrase
* @param mixed $value
* @return string
*/
function cryptoJsAesEncrypt($passphrase, $value){
$salt = openssl_random_pseudo_bytes(8);
$salted = '';
$dx = '';
while (strlen($salted) < 48) {
$dx = md5($dx.$passphrase.$salt, true);
$salted .= $dx;
}
$key = substr($salted, 0, 32);
$iv = substr($salted, 32,16);
$encrypted_data = openssl_encrypt(json_encode($value), 'aes-256-cbc', $key, true, $iv);
$data = array("ct" => base64_encode($encrypted_data), "iv" => bin2hex($iv), "s" => bin2hex($salt));
return json_encode($data);
}

Javascript 库

var CryptoJSAesJson = {
stringify: function (cipherParams) {
var j = {ct: cipherParams.ciphertext.toString(CryptoJS.enc.Base64)};
if (cipherParams.iv) j.iv = cipherParams.iv.toString();
if (cipherParams.salt) j.s = cipherParams.salt.toString();
return JSON.stringify(j);
},
parse: function (jsonStr) {
var j = JSON.parse(jsonStr);
var cipherParams = CryptoJS.lib.CipherParams.create({ciphertext: CryptoJS.enc.Base64.parse(j.ct)});
if (j.iv) cipherParams.iv = CryptoJS.enc.Hex.parse(j.iv)
if (j.s) cipherParams.salt = CryptoJS.enc.Hex.parse(j.s)
return cipherParams;
}
}

Javascript 示例

var encrypted = CryptoJS.AES.encrypt(JSON.stringify("value to encrypt"), "my passphrase", {format: CryptoJSAesJson}).toString();
var decrypted = JSON.parse(CryptoJS.AES.decrypt(encrypted, "my passphrase", {format: CryptoJSAesJson}).toString(CryptoJS.enc.Utf8));

示例 PHP

$encrypted = cryptoJsAesEncrypt("my passphrase", "value to encrypt");
$decrypted = cryptoJsAesDecrypt("my passphrase", $encrypted);

关于javascript - 用 PHP 加密,用 Javascript 解密(cryptojs),我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/24337317/

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