เข้ารหัส
package test;
import java.security.spec.AlgorithmParameterSpec;
import java.security.spec.KeySpec;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.PBEKeySpec;
import javax.crypto.spec.PBEParameterSpec;
public class Encrypt {
private Cipher ecipher;
private final String secret = "y781iGR57Q8CuuTbjEtSzg==";
public Encrypt() {
try {
byte[] salt = {
(byte) 0xA9, (byte) 0x9B, (byte) 0xC8, (byte) 0x32,
(byte) 0x56, (byte) 0x35, (byte) 0xE3, (byte) 0x03
};
int iterationCount = 19;
KeySpec keySpec = new PBEKeySpec(secret.toCharArray(), salt, iterationCount);
SecretKey key = SecretKeyFactory.getInstance("PBEWithMD5AndDES").generateSecret(keySpec);
ecipher = Cipher.getInstance(key.getAlgorithm());
AlgorithmParameterSpec paramSpec = new PBEParameterSpec(salt, iterationCount);
ecipher.init(Cipher.ENCRYPT_MODE, key, paramSpec);
} catch (Exception ex) {
Logger.getLogger(Encrypt.class.getName()).log(Level.SEVERE, null, ex);
}
}
public String testEncrypt() {
try {
String str = "Hello World";
byte[] utf8 = str.getBytes("UTF8");
byte[] enc = ecipher.doFinal(utf8);
return new sun.misc.BASE64Encoder().encode(enc);
} catch (Exception ex) {
Logger.getLogger(Encrypt.class.getName()).log(Level.SEVERE, null, ex);
}
return null;
}
public static void main(String[] args) {
Encrypt encrypt = new Encrypt();
System.out.println(encrypt.testEncrypt());
}
}
ถอดรหัส
package test;
import java.security.spec.AlgorithmParameterSpec;
import java.security.spec.KeySpec;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.PBEKeySpec;
import javax.crypto.spec.PBEParameterSpec;
public class Decrypt {
private Cipher dcipher;
private final String secret = "y781iGR57Q8CuuTbjEtSzg==";
public Decrypt() {
try {
byte[] salt = {
(byte) 0xA9, (byte) 0x9B, (byte) 0xC8, (byte) 0x32,
(byte) 0x56, (byte) 0x35, (byte) 0xE3, (byte) 0x03
};
int iterationCount = 19;
KeySpec keySpec = new PBEKeySpec(secret.toCharArray(), salt, iterationCount);
SecretKey key = SecretKeyFactory.getInstance("PBEWithMD5AndDES").generateSecret(keySpec);
dcipher = Cipher.getInstance(key.getAlgorithm());
AlgorithmParameterSpec paramSpec = new PBEParameterSpec(salt, iterationCount);
dcipher.init(Cipher.DECRYPT_MODE, key, paramSpec);
} catch (Exception ex) {
Logger.getLogger(Decrypt.class.getName()).log(Level.SEVERE, null, ex);
}
}
public String testDecrypt() {
try {
String str = "GdMOJDcTyBXFTK7yXmqIGw==";
byte[] dec = new sun.misc.BASE64Decoder().decodeBuffer(str);
byte[] utf8 = dcipher.doFinal(dec);
return new String(utf8, "UTF8");
} catch (Exception ex) {
Logger.getLogger(Decrypt.class.getName()).log(Level.SEVERE, null, ex);
}
return null;
}
public static void main(String[] args) {
Decrypt decrypt = new Decrypt();
System.out.println(decrypt.testDecrypt());
}
}
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