PHP/Java的DES加密解密

最新推荐文章于 2021-12-01 13:56:47 发布

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最新推荐文章于 2021-12-01 13:56:47 发布

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分类专栏： php 文章标签： PHP Java DES加密解密

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本文提供了Java和PHP两种语言实现DES加密解密的具体代码案例，包括密钥设置、加密、解密等核心步骤。通过这些示例代码，读者可以了解如何在实际项目中应用DES算法。

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Java DES加密解密程序：

public class EncDec {
SecretKey desKey;

public void setKey(String key){
byte[] staticKey = key.getBytes();
try {
SecretKeyFactory keyfact = SecretKeyFactory.getInstance("DES");
DESKeySpec dks = new DESKeySpec(staticKey);
desKey = keyfact.generateSecret(dks);
}catch(Exception e){
Log.log("Set DES Key failed.");
Log.log(e.getMessage());
e.printStackTrace();
}
}

public String encode(String src) {
String str = "";
Log.log("Trying encoding string: " + src);
try{
Cipher c1 = Cipher.getInstance("DES/ECB/PKCS5Padding");
c1.init(Cipher.ENCRYPT_MODE, desKey);
byte[] encoded = c1.doFinal(src.getBytes());
for(int i=0;i>4&0X0F)];
ch[1] = Digest[b&0X0F];
return new String(ch);
}
}

PHP DES加密解密程序

<?php
$key = "somekeyy";

function encrypt($encrypt) {
global $key;
$encrypt = pkcs5_pad($encrypt);
$iv = mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_DES, MCRYPT_MODE_ECB), MCRYPT_RAND);
$passcrypt = mcrypt_encrypt(MCRYPT_DES, $key, $encrypt, MCRYPT_MODE_ECB, $iv);
// $encode = base64_encode($encode);
// return $encode;
return bin2hex($passcrypt);
}

function decrypt($decrypt) {
global $key;
// $decoded = base64_decode($decrypt);
$decoded = pack("H*", $decrypt);
$iv = mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_DES, MCRYPT_MODE_ECB), MCRYPT_RAND);
$decrypted = mcrypt_decrypt(MCRYPT_DES, $key, $decoded, MCRYPT_MODE_ECB, $iv);
return pkcs5_unpad($decrypted);
}

function pkcs5_unpad($text)
{
$pad = ord($text{strlen($text)-1});

if ($pad > strlen($text)) return $text;
if (strspn($text, chr($pad), strlen($text) - $pad) != $pad) return $text;
return substr($text, 0, -1 * $pad);
}

function pkcs5_pad($text)
{
$len = strlen($text);
$mod = $len % 8;
$pad = 8 - $mod;
return $text.str_repeat(chr($pad),$pad);
}

//截中文英文子串

echo encrypt("123456789abcdefg");
echo "/n";
echo decrypt("129E91B969FA1FAA72D8567F2E5B22A7EFFC71AE977814B8");
echo "/n";