我想将加密/解密从JAVA复制到PHP。但我的问题结果是不匹配。我不知道java所以我试图从java中理解每行代码并用PHP编写。
JAVA
secretkey: thisisasecretkey
import java.security.MessageDigest;
import java.util.Arrays;
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import org.apache.commons.codec.binary.Base64;
public class TDESEncrypter {
public String _encrypt(String message, String secretKey) throws Exception {
MessageDigest md = MessageDigest.getInstance("SHA-1");
byte[] digestOfPassword = md.digest(secretKey.getBytes("utf-8"));
byte[] keyBytes = Arrays.copyOf(digestOfPassword, 24);
SecretKey key = new SecretKeySpec(keyBytes, "DESede");
Cipher cipher = Cipher.getInstance("DESede");
cipher.init(Cipher.ENCRYPT_MODE, key);
byte[] plainTextBytes = message.getBytes("utf-8");
byte[] buf = cipher.doFinal(plainTextBytes);
byte [] base64Bytes = Base64.encodeBase64(buf);
String base64EncryptedString = new String(base64Bytes);
return base64EncryptedString;
}
public String _decrypt(String encryptedText, String secretKey) throws Exception {
byte[] message = Base64.decodeBase64(encryptedText.getBytes("utf-8"));
MessageDigest md = MessageDigest.getInstance("SHA-1");
byte[] digestOfPassword = md.digest(secretKey.getBytes("utf-8"));
byte[] keyBytes = Arrays.copyOf(digestOfPassword, 24);
SecretKey key = new SecretKeySpec(keyBytes, "DESede");
Cipher decipher = Cipher.getInstance("DESede");
decipher.init(Cipher.DECRYPT_MODE, key);
byte[] plainText = decipher.doFinal(message);
return new String(plainText, "UTF-8");
}
}
以下是使用java的步骤,这些步骤可能对PHP中的函数进行复制很有用。
到目前为止我做了什么,
function encrypt($data, $secret) {
$key = sha1(utf8_encode($secret), true); <-- Step 1 & 2
$iv = utf8_encode("jvz8bUAx"); <-- Do I use initialise vector on it?
$key .= substr($key, 0, 8);
$method = 'des-ede3-cbc'; //<-- Is this cypher method correct from the above?
if (strlen($data) % 8) {
$data = str_pad($data, strlen($data) + 8 - strlen($data) % 8, "\0");
}
$encrypted = openssl_encrypt($data, $method, $key, OPENSSL_RAW_DATA | OPENSSL_ZERO_PADDING, $iv); //Force zero padding.
$encrypted = urlencode(base64_encode($encrypted)); // Added the urlencode.....
return $encrypted;
}
在Java代码中,加密算法被指定为DESede
。这对应于DESede/ECB/PKCS5Padding
,即使用ECB模式和PKCS5填充。这意味着对于PHP代码:
des-ede3
openssl_encrypt
默认使用PKCS5-padding)在Java代码中,SHA1-hash(大小为20字节)通过附加0值扩展到24字节。此扩展也必须在PHP代码中完成。
Java _encrypt
方法的一个可能的PHP对应物是:
function encrypt($data, $secret) {
$key = sha1(mb_convert_encoding($secret, "UTF-8"), true); // Create SHA-1 hash (20 byte)
$key = str_pad($key, 24, "\0"); // Extend to 24 byte by appending 0-values (would also happen automatically on openssl_encrypt-call)
$encrypted = openssl_encrypt($data, 'DES-EDE3', $key, OPENSSL_RAW_DATA); // Encryption: DESede (24 byte key), ECB-mode, PKCS5-Padding
return base64_encode($encrypted); // Base64-encoding
}
最后:Java代码有许多缺点,例如:
后者只是为了完整性,因为它可能是遗留代码,无法以任何理由改变。