我在这里遇到了一些奇怪的问题......
我有以下两个脚本:
首先,一个 PHP 脚本(我正在使用 http://writecodeonline.com/php/ 进行测试)
$key = '[E%Xr6pG-IDIA89_&=NI[AREofOy0#Mv[nJ7rO@T^PwgT!NVY*Hri@($p4luBM)ugVvbnAnWL@xGK*jBP3s$g#-XTH{e3@X*0StJ';
$string = 'Testing Testing Testing Testing Testing Testing Testing Testing Testing Testing Testing Testing Testing Testing Testing Testing Testing Testing Testing Testing ';
//
$encrypted = base64_encode(mcrypt_encrypt(MCRYPT_RIJNDAEL_128, md5($key), $string, MCRYPT_MODE_ECB));
$decrypted = rtrim(mcrypt_decrypt(MCRYPT_RIJNDAEL_128, md5($key), base64_decode($encrypted), MCRYPT_MODE_ECB), "\0");
echo $encrypted . "<br>";
echo $decrypted;
其次,一个Java类,
import java.io.*;
import java.net.*;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import javax.crypto.*;
import javax.crypto.spec.*;
import org.apache.commons.codec.binary.Base64;
import org.apache.commons.codec.digest.DigestUtils;
public class Main {
/**
* @param args
* @throws Exception
*/
public static void main(String[] args) throws Exception {
String pw = "[E%Xr6pG-IDIA89_&=NI[AREofOy0#Mv[nJ7rO@T^PwgT!NVY*Hri@($p4luBM)ugVvbnAnWL@xGK*jBP3s$g#-XTH{e3@X*0StJ";
String str = encode("Testing Testing Testing Testing Testing Testing Testing Testing Testing Testing Testing Testing Testing Testing Testing Testing Testing Testing Testing Testing ", pw);
System.out.println(str);
System.out.println(decode(str, pw));
}
public static String encode(String s, String p) throws Exception
{
String cleartext = padRight(s, s.length()+(16-(s.length()%16)));
String key = DigestUtils.md5Hex(p);
SecretKeySpec skeySpec = new SecretKeySpec(key.getBytes(), "AES");
Cipher cipher = Cipher.getInstance("AES/ECB/NoPadding");
cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
byte[] encrypted = cipher.doFinal(cleartext.getBytes());
return Base64.encodeBase64String(encrypted);
}
public static String decode(String encrypted, String p) throws Exception
{
byte[] bts = Base64.decodeBase64(encrypted);
String key = DigestUtils.md5Hex(p);
SecretKeySpec skeySpec = new SecretKeySpec(key.getBytes(), "AES");
Cipher cipher = Cipher.getInstance("AES/ECB/NoPadding");
cipher.init(Cipher.DECRYPT_MODE, skeySpec);
byte[] decrypted = cipher.doFinal(bts);
return new String(decrypted).replaceAll("\0", "");
}
public static String padRight(String s, int n) {
while (s.length() < n)
{
s+="\0";
}
return s;
}
}
奇怪的事情发生了。当我测试 PHP 脚本时,我得到:
/wyCRFRmXFDGk0O5+EAHWv8MgkRUZlxQxpNDufhAB1r/DIJEVGZcUMaTQ7n4QAda/wyCRFRmXFDGk0O5+EAHWv8MgkRUZlxQxpNDufhAB1r/DIJEVGZcUMaTQ7n4QAda/wyCRFRmXFDGk0O5+EAHWv8MgkRUZlxQxpNDufhAB1r/DIJEVGZcUMaTQ7n4QAda/wyCRFRmXFDGk0O5+EAHWg==
作为加密代码。
但是,当我测试 java 代码时,我得到:
/wyCRFRmXFDGk0O5+EAHWv8MgkRUZlxQxpNDufhAB1r/DIJEVGZcUMaTQ7n4QAda/wyCRFRmXFDGk0O5+EAHWv8MgkRUZlxQxpNDufhAB1r/DIJEVGZcUMaTQ7n4QAda/wyCRFRmXFDGk0O5+EAHWv8MgkRUZlxQxpNDufhAB1r/DIJEVGZcUMaTQ7n4QAda/wyCRFRmXFDGk0O5+EAHWsdyQJ3DP2jBsJcLh2n2wv0=
如果仔细观察,您会发现(不知何故)java 文本更长了!但是,奇怪的是,这两个文本在“+EAH”之前完全相同,这就是它们发生分歧的时候。我觉得这很奇怪——为什么?
因为我已经在许多其他字符串上测试了这段代码,从 lorum ipsum 到单词“Testing”,没有任何错误。我发现导致这种情况(到目前为止)的唯一方法是多次重复用空格分隔的短词。
我对此非常担心,因为我不知道还有什么其他方法可以触发这种奇怪的行为。所以这让我想到了我的问题……以戴维·琼斯储物柜的名义,到底是什么东西在装桶?
最佳答案
我不是加密专家,但这可能是填充问题。您可以尝试以下方法。
PHP
设置填充如下:
$blockSize = mcrypt_get_block_size(MCRYPT RIJNDAEIL_128, MCRYPT_MODE_ECB);
$padding = $blockSize - (strlen($string) % $blockSize);
$string .= str_repeat(chr($padding), $padding);
这将使用 PKCS#5 填充,而不是 PHP 的空填充。
Java
更改以下行:
Cipher cipher = Cipher.getInstance("AES/ECB/NoPadding");
到:
Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
不幸的是,我没有可以比较结果的 Java 环境,但我希望它能有所帮助。
关于java - PHP vs JAVA AES 加密,有什么区别?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/11838197/