我有一个集成合作伙伴之一为其API加密共享的以下Java代码
import java.nio.ByteBuffer;
import java.security.AlgorithmParameters;
import java.security.SecureRandom;
import java.security.spec.KeySpec;
import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.PBEKeySpec;
import javax.crypto.spec.SecretKeySpec;
import org.apache.commons.codec.binary.Base64;
public class AES256 {
/**
*
* @param word
* @param keyString
* @return
* @throws Exception
*/
public static String encrypt(String word, String keyString) throws Exception {
byte[] ivBytes;
//String password = "zohokeyoct2017";
/*you can give whatever you want for password. This is for testing purpose*/
SecureRandom random = new SecureRandom();
byte bytes[] = new byte[20];
random.nextBytes(bytes);
byte[] saltBytes = bytes;
System.out.println("salt enc:"+saltBytes.toString());
// Derive the key
SecretKeyFactory factory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1");
PBEKeySpec spec = new PBEKeySpec(keyString.toCharArray(), saltBytes, 65556, 256);
SecretKey secretKey = factory.generateSecret(spec);
SecretKeySpec secret = new SecretKeySpec(secretKey.getEncoded(), "AES");
//encrypting the word
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
cipher.init(Cipher.ENCRYPT_MODE, secret);
AlgorithmParameters params = cipher.getParameters();
ivBytes = params.getParameterSpec(IvParameterSpec.class).getIV();
byte[] encryptedTextBytes = cipher.doFinal(word.getBytes("UTF-8"));
//prepend salt and vi
byte[] buffer = new byte[saltBytes.length + ivBytes.length + encryptedTextBytes.length];
System.arraycopy(saltBytes, 0, buffer, 0, saltBytes.length);
System.arraycopy(ivBytes, 0, buffer, saltBytes.length, ivBytes.length);
System.arraycopy(encryptedTextBytes, 0, buffer, saltBytes.length + ivBytes.length, encryptedTextBytes.length);
return new Base64().encodeToString(buffer);
}
/**
*
* @param encryptedText
* @param keyString
* @return
* @throws Exception
*/
public static String decrypt(String encryptedText, String keyString) throws Exception {
//String password = "zohokeyoct2017";
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
//strip off the salt and iv
ByteBuffer buffer = ByteBuffer.wrap(new Base64().decode(encryptedText));
byte[] saltBytes = new byte[20];
buffer.get(saltBytes, 0, saltBytes.length);
byte[] ivBytes1 = new byte[16];
buffer.get(ivBytes1, 0, ivBytes1.length);
byte[] encryptedTextBytes = new byte[buffer.capacity() - saltBytes.length - ivBytes1.length];
buffer.get(encryptedTextBytes);
// Deriving the key
SecretKeyFactory factory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1");
KeySpec spec = new PBEKeySpec(keyString.toCharArray(), saltBytes, 65556, 256);
SecretKey secretKey = factory.generateSecret(spec);
SecretKeySpec secret = new SecretKeySpec(secretKey.getEncoded(), "AES");
cipher.init(Cipher.DECRYPT_MODE, secret, new IvParameterSpec(ivBytes1));
byte[] decryptedTextBytes = null;
try {
decryptedTextBytes = cipher.doFinal(encryptedTextBytes);
} catch (IllegalBlockSizeException | BadPaddingException e) {
System.out.println("Exception"+e);
}
return new String(decryptedTextBytes);
}
public static void main (String []args) throws Exception{
String encryptedText;
encryptedText = AES256.encrypt("106_2002005_9000000106","3264324");
System.out.println("Encrypted Text:"+encryptedText);
System.out.println("Decrypted Text:"+AES256.decrypt(encryptedText,"3264324"));
}
}
然后，我尝试了一些从stackoverflow或google获得的PHP代码。无法使它们中的任何一个起作用。
我最近在PHP上尝试过的代码如下
class AtomAES {
public function encrypt($data = '', $key = NULL, $salt = "") {
if($key != NULL && $data != "" && $salt != ""){
$method = "AES-256-CBC";
//Converting Array to bytes
$iv = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15];
$chars = array_map("chr", $iv);
$IVbytes = join($chars);
$salt1 = mb_convert_encoding($salt, "UTF-8"); //Encoding to UTF-8
$key1 = mb_convert_encoding($key, "UTF-8"); //Encoding to UTF-8
//SecretKeyFactory Instance of PBKDF2WithHmacSHA1 Java Equivalent
$hash = openssl_pbkdf2($key1,$salt1,'256','65536', 'sha1');
$encrypted = openssl_encrypt($data, $method, $hash, OPENSSL_RAW_DATA, $IVbytes);
return bin2hex($encrypted);
}else{
return "String to encrypt, Salt and Key is required.";
}
}
public function decrypt($data="", $key = NULL, $salt = "") {
if($key != NULL && $data != "" && $salt != ""){
$dataEncypted = hex2bin($data);
$method = "AES-256-CBC";
//Converting Array to bytes
$iv = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15];
$chars = array_map("chr", $iv);
$IVbytes = join($chars);
$salt1 = mb_convert_encoding($salt, "UTF-8");//Encoding to UTF-8
$key1 = mb_convert_encoding($key, "UTF-8");//Encoding to UTF-8
//SecretKeyFactory Instance of PBKDF2WithHmacSHA1 Java Equivalent
$hash = openssl_pbkdf2($key1,$salt1,'256','65536', 'sha1');
$decrypted = openssl_decrypt($dataEncypted, $method, $hash, OPENSSL_RAW_DATA, $IVbytes);
return $decrypted;
}else{
return "Encrypted String to decrypt, Salt and Key is required.";
}
}
}
这是我想要尝试的PHP代码，但是按照Java代码的要求，它无法正常工作。
Encrypted Text:1HO8iuSZf41RzP/gUleEJY3zhtLJVwFMnhZiphnoG0m9ss+g93Sj5SqQg0D7OsgSvUZCeX2Ck5QPpFrPxM0FE/yFE5s=
Decrypted Text:This is a sample text
KEY: NEWENCTEST
尝试使用PHP代码和密钥解密上述Java加密文本，如果可以的话，效果很好。
如果有人可以帮助我，这将是一个很大的帮助！
TIA！
答案 0 :(得分：4)
在 Java encrypt方法中，（随机生成的）盐字节和IV字节与加密字节一起复制到单个字节数组中，该字节数组已进行base64编码然后返回。相反， PHP encrypt-方法仅返回加密字节的十六进制表示形式。因此，有关盐和IV的信息会丢失，并且解密不再可能（除非以其他方式重建盐和IV）。为了防止这种情况，您必须按以下方式更改 PHP encrypt-方法：
public function encrypt($data = '', $key = NULL) {
if($key != NULL && $data != ""){
$method = "AES-256-CBC";
$key1 = mb_convert_encoding($key, "UTF-8"); //Encoding to UTF-8
//Randomly generate IV and salt
$salt1 = random_bytes (20);
$IVbytes = random_bytes (16);
//SecretKeyFactory Instance of PBKDF2WithHmacSHA1 Java Equivalent
$hash = openssl_pbkdf2($key1,$salt1,'256','65556', 'sha1');
// Encrypt
$encrypted = openssl_encrypt($data, $method, $hash, OPENSSL_RAW_DATA, $IVbytes);
// Concatenate salt, IV and encrypted text and base64-encode the result
$result = base64_encode($salt1.$IVbytes.$encrypted);
return $result;
}else{
return "String to encrypt, Key is required.";
}
}
现在，参数$result是base64编码的字符串，其中包含salt，IV和加密。顺便说一下，参数$salt1和$IVbytes也现在是随机生成的（类似于Java encrypt方法）。另外，用于密钥生成的迭代计数已从65536更改为65556（类似于Java encrypt方法）。注意：通常，由于salt和IV的随机性，加密的文本是不可复制的（即使在相同的纯文本和相同的密钥/密码的情况下）。
Java decrypt-方法解码base64编码的字符串，然后确定解密所需的三个部分，即salt，IV和加密字节。 PHP decrypt-方法必须补充以下功能：
public function decrypt($data="", $key = NULL) {
if($key != NULL && $data != ""){
$method = "AES-256-CBC";
$key1 = mb_convert_encoding($key, "UTF-8");//Encoding to UTF-8
// Base64-decode data
$dataDecoded = base64_decode($data);
// Derive salt, IV and encrypted text from decoded data
$salt1 = substr($dataDecoded,0,20);
$IVbytes = substr($dataDecoded,20,16);
$dataEncrypted = substr($dataDecoded,36);
// SecretKeyFactory Instance of PBKDF2WithHmacSHA1 Java Equivalent
$hash = openssl_pbkdf2($key1,$salt1,'256','65556', 'sha1');
// Decrypt
$decrypted = openssl_decrypt($dataEncrypted, $method, $hash, OPENSSL_RAW_DATA, $IVbytes);
return $decrypted;
}else{
return "Encrypted String to decrypt, Key is required.";
}
}
现在，参数$dataDecoded包含已解码的base64编码的字符串，通过该字符串可以得到salt-（$salt1，IV-（$IVbytes）和加密-
导出（$dataEncrypted个字节。另外，用于密钥生成的迭代计数已从65536更改为65556（类似于Java decrypt方法）。
测试案例1：使用PHP加密和解密
$atomAES = new AtomAES();
$encrypt = $atomAES->encrypt("This is a text...This is a text...This is a text...", "This is the password");
echo $encrypt;
$decrypt = $atomAES->decrypt($encrypt, "This is the password");
echo $decrypt;
带有$encrypt的结果（由于salt和IV的随机性质，每次加密的结果通常不同）：
6n4V9wqgsQq87HOYNRZmddnncSNyjFZZb8nSSAi681+hs+jwzDVQCugcg108iTMZLlmBB2KQ4iist+SuboFH0bnJxW6+rmZK07CiZ1Ip+8XOv6UuJPjVPxXTIny5p3QptpBGpw==
，对于$decrypt：
This is a text...This is a text...This is a text...
测试案例2：使用Java加密，使用PHP解密
encryptedText = AES256.encrypt("This is a text...This is a text...This is a text...","This is the password");
System.out.println(encryptedText);
具有encryptedText的结果（由于盐和IV的随机性质，每次加密的结果通常有所不同）：
qfR76lc04eYAPjjqYiE1wXoraD9bI7ql41gSV/hsT/BLoJe0i0GgJnud7IXOHdcCljgtyFkXB95XibSyr/CazoMhwPeK6xsgPbQkr7ljSg8H1i17c8iWpEXBQPm0nij9qQNJ8A==
和
$decrypt = $atomAES->decrypt("qfR76lc04eYAPjjqYiE1wXoraD9bI7ql41gSV/hsT/BLoJe0i0GgJnud7IXOHdcCljgtyFkXB95XibSyr/CazoMhwPeK6xsgPbQkr7ljSg8H1i17c8iWpEXBQPm0nij9qQNJ8A==", "This is the password");
echo $decrypt;
包含$decrypt的结果：
This is a text...This is a text...This is a text...
测试案例3：使用Java加密，使用PHP解密
encryptedText = AES256.encrypt("This is a sample text","NEWENCTEST");
System.out.println(encryptedText);
1HO8iuSZf41RzP/gUleEJY3zhtLJVwFMnhZiphnoG0m9ss+g93Sj5SqQg0D7OsgSvUZCeX2Ck5QPpFrPxM0FE/yFE5s=
和
$decrypt = $atomAES->decrypt("1HO8iuSZf41RzP/gUleEJY3zhtLJVwFMnhZiphnoG0m9ss+g93Sj5SqQg0D7OsgSvUZCeX2Ck5QPpFrPxM0FE/yFE5s=", "NEWENCTEST");
echo $decrypt;
包含$decrypt的结果：
This is a sample text