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真是一個越野車的問題，熙是代碼：在Java充氣城堡AES 256解密問題
import java.io.IOException;
import java.security.*;
import javax.crypto.*;
import javax.crypto.spec.*;
public class Encryption {
public static final int a = 0x9F224;
public static final int b = 0x98C36;
public static final int c = 0x776a2;
public static final int d = 0x87667;
private String preMaster;
IvParameterSpec ivSpec = new IvParameterSpec(new byte[] { 0x00, 0x01, 0x02, 0x03, 0x00, 0x01, 0x02, 0x03, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x01 });
private byte[] text;
private SecretKey secret;
private byte[] sKey;
protected SecretKey passwordKey;
protected PBEParameterSpec paramSpec;
public static final String ENCYT_ALGORITHM = "AES/CBC/PKCS7Padding";
public static final String KEY_ALGORITHM = "PBEWITHSHA256AND256BITAES-CBC-BC" ;
//BENCYT_ALGORITHMSE64Encoder encod = new BENCYT_ALGORITHMSE64Encoder();
//BENCYT_ALGORITHMSE64Decoder decod = new BENCYT_ALGORITHMSE64Decoder();
public Encryption(String preMaster,String text,int x){
this.preMaster=preMaster;
this.text=Encoder.decode(text.toCharArray());
try {
KeyGenerator kg = KeyGenerator.getInstance("AES");
kg.init(256);
secret = kg.generateKey();
} catch (Exception e) {
// TODO ENCYT_ALGORITHMuto-generated catch block
e.printStackTrace();
}
}
public Encryption(String key,String text){
try {
this.text = Encoder.decode(text.toCharArray());
this.sKey = Encoder.decode(key.toCharArray());
} catch (Exception e) {
e.printStackTrace();
}
}
public String preMaster() {
byte[] keys = null;
keys = preMaster.getBytes();
int x = -1;
int process = 0;
while (x < keys.length - 2) {
x++;
switch (x) {
case 1:
process = keys[x + 1] | a^c & (d | keys[x] % a);
case 2:
process += a | (keys[x]^c) & d;
case 3:
process += keys[x]^(keys[x + 1]/a) % d^b;
default:
process += keys[x + 1]/(keys[x]^c | d);
}
}
byte[] xs = new byte[] { (byte) (process >>> 24),
(byte) (process >> 16 & 0xff), (byte) (process >> 8 & 0xff),
(byte) (process & 0xff) };
preMaster = new String(xs);
KeyGenerators key = new KeyGenerators(preMaster);
String toMaster = key.calculateSecurityHash("MD5")
+ key.calculateSecurityHash("MD2")
+ key.calculateSecurityHash("SHA-512");
return toMaster;
}
public String keyWrapper(){
Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
Key SharedKey = secret;
String key = null;
char[] preMaster = this.preMaster().toCharArray();
try {
byte[]salt={ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06};
paramSpec = new PBEParameterSpec(salt,20);
PBEKeySpec keySpec = new PBEKeySpec(preMaster);
SecretKeyFactory factory = SecretKeyFactory.getInstance(KEY_ALGORITHM);
passwordKey = factory.generateSecret(keySpec);
Cipher c = Cipher.getInstance(KEY_ALGORITHM);
c.init(Cipher.WRAP_MODE, passwordKey, paramSpec);
byte[] wrappedKey = c.wrap(SharedKey);
key=Encoder.encode(wrappedKey);
}catch(Exception e){
e.printStackTrace();
}
return key;
}
public Key KeyUnwrapper(){
Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
byte[] wrappedKey = sKey;
Key unWrapped = null;
try{
Cipher c = Cipher.getInstance(KEY_ALGORITHM,"BC");
c.init(Cipher.UNWRAP_MODE, passwordKey, paramSpec);
unWrapped = c.unwrap(wrappedKey, ENCYT_ALGORITHM, Cipher.SECRET_KEY);
}catch(Exception e){
e.printStackTrace();
}
return unWrapped;
}
public String encrypt(){
Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
SecretKey key = secret;
String result=null;
try{
Cipher cipher = Cipher.getInstance(ENCYT_ALGORITHM);
cipher.init(Cipher.ENCRYPT_MODE, key);
result =Encoder.encode(cipher.doFinal(text));
}catch(Exception e){
e.printStackTrace();
}
return result;
}
public String decrypt(){
Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
String result = null;
SecretKey key = (SecretKey) KeyUnwrapper();
try{
Cipher cipher = Cipher.getInstance(ENCYT_ALGORITHM, "BC");
cipher.init(Cipher.DECRYPT_MODE, key);
result = Encoder.encode(cipher.doFinal(text));
}catch(Exception e){
e.printStackTrace();
}
return result;
}
public static void main(String[] args) throws IOException{
Encryption en = new Encryption("123456","Hello World",0);
String enText = en.encrypt();
String key = en.keyWrapper();
System.out.println(key);
System.out.println(enText);
Encryption de = new Encryption(key,enText);
String plainText = de.decrypt();
System.out.println(plainText);
}
而且，這是結果......我嘗試了所有的組合我可以，但他們都不作品..
F63DE3EE8CEECF4DF76836CA6D69A3903BD87B5726656C54C1C8EC30B6653B2C0E5C7672BE3CF4BE7B2DC7AC5D07DEA0
F1C8D92E5F74019C569D54D70045ADD6
java.lang.NullPointerException
at org.bouncycastle.jce.provider.JCEBlockCipher.engineInit(Unknown Source)
at javax.crypto.Cipher.init(DashoA13*..)
at javax.crypto.Cipher.init(DashoA13*..)
at fiador.authentication.util.Encryption.KeyUnwrapper(Encryption.java:114)
at fiador.authentication.util.Encryption.decrypt(Encryption.java:142)
at fiador.authentication.util.Encryption.main(Encryption.java:160)
java.lang.NullPointerException
at org.bouncycastle.jce.provider.JCEBlockCipher.engineInit(Unknown Source)
at javax.crypto.Cipher.a(DashoA13*..)
at javax.crypto.Cipher.a(DashoA13*..)
at javax.crypto.Cipher.init(DashoA13*..)
at javax.crypto.Cipher.init(DashoA13*..)
at fiador.authentication.util.Encryption.decrypt(Encryption.java:145)
at fiador.authentication.util.Encryption.main(Encryption.java:160)
空