下面列出了javax.crypto.spec.SecretKeySpec#getEncoded() 实例代码，或者点击链接到github查看源代码，也可以在右侧发表评论。
/**
* 加密
*
* @param data 需要加密的内容
* @param key 加密密码
* @return
*/
public static byte[] encrypt(byte[] data, byte[] key) {
CheckUtils.notEmpty(data, "data");
CheckUtils.notEmpty(key, "key");
if (key.length != 16) {
throw new RuntimeException("Invalid AES key length (must be 16 bytes)");
}
try {
SecretKeySpec secretKey = new SecretKeySpec(key, "AES");
byte[] enCodeFormat = secretKey.getEncoded();
SecretKeySpec seckey = new SecretKeySpec(enCodeFormat, "AES");
Cipher cipher = Cipher.getInstance(ConfigureEncryptAndDecrypt.AES_ALGORITHM);// 创建密码器
IvParameterSpec iv = new IvParameterSpec(key);//使用CBC模式，需要一个向量iv，可增加加密算法的强度
cipher.init(Cipher.ENCRYPT_MODE, seckey, iv);// 初始化
byte[] result = cipher.doFinal(data);
return result; // 加密
} catch (Exception e) {
e.printStackTrace();
throw new RuntimeException("encrypt fail!", e);
}
}
/**
* 解密
*
* @param data 待解密内容
* @param key 解密密钥
* @return
*/
public static byte[] decrypt(byte[] data, byte[] key) {
CheckUtils.notEmpty(data, "data");
CheckUtils.notEmpty(key, "key");
if (key.length != 16) {
throw new RuntimeException("Invalid AES key length (must be 16 bytes)");
}
try {
SecretKeySpec secretKey = new SecretKeySpec(key, "AES");
byte[] enCodeFormat = secretKey.getEncoded();
SecretKeySpec seckey = new SecretKeySpec(enCodeFormat, "AES");
Cipher cipher = Cipher.getInstance(ConfigureEncryptAndDecrypt.AES_ALGORITHM);// 创建密码器
IvParameterSpec iv = new IvParameterSpec(key);//使用CBC模式，需要一个向量iv，可增加加密算法的强度
cipher.init(Cipher.DECRYPT_MODE, seckey, iv);// 初始化
byte[] result = cipher.doFinal(data);
return result; // 解密
} catch (Exception e) {
e.printStackTrace();
throw new RuntimeException("decrypt fail!", e);
}
}
/**
* getEncoded() method testing. Tests that returned array is equal to the
* array specified in the constructor. Checks that modification
* of returned array does not affect the internal array.
*/
public void testGetEncoded() {
byte[] key = new byte[] {1, 2, 3, 4, 5};
String algorithm = "Algorithm";
SecretKeySpec ks = new SecretKeySpec(key, algorithm);
byte[] result = ks.getEncoded();
if (! Arrays.equals(key, result)) {
fail("The returned key does not equal to the specified "
+ "in the constructor.");
}
result[0] ++;
assertFalse("The change of returned by getEncoded() method key "
+ "should not cause the change of internal array.",
result[0] == ks.getEncoded()[0]);
// Regression for HARMONY-78
int offset = 1;
int len = 4;
SecretKeySpec sks = new SecretKeySpec(key, offset, len, algorithm);
assertEquals("Key length is incorrect", len, sks.getEncoded().length);
}
public static final String decrypt(String filename,byte xor) throws IOException, NoSuchPaddingException, NoSuchAlgorithmException, InvalidKeyException, BadPaddingException, IllegalBlockSizeException, NoSuchProviderException, InvalidAlgorithmParameterException {
FileInputStream fileInputStream = new FileInputStream(new File(filename));
byte[] bytes = fileInputStream.readAllBytes();
byte[] inb =new byte[0x400];
for(int i=0;i<inb.length;i++){
inb[i]= bytes[i];
}
Security.addProvider(new BouncyCastleProvider());
byte[] keyBytes = get("3a1f12ef91839f1e3745d4368dae3de2");
SecretKeySpec keySpec = new SecretKeySpec(keyBytes, "AES");
byte[] encoded = keySpec.getEncoded();
Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding","BC");
cipher.init(Cipher.DECRYPT_MODE, keySpec, new IvParameterSpec(encoded));
byte[] result = cipher.doFinal(inb);
for(int i=0;i<result.length;i++){
result[i]= (byte) (result[i] ^ xor);
}
String plainText = new String(result);
System.out.println(xor+"==========");
System.out.println(plainText.substring(0x300,0xff));
FileOutputStream outputStream=new FileOutputStream(new File("./"+xor+"abc"));
outputStream.write(result);
for(int i=0x400;i<bytes.length;i++){
outputStream.write(bytes[i]);
}
outputStream.close();
return plainText;
}
public SimpleCredentialStore() {
SecureRandom r = new SecureRandom();
byte[] keyBytes = new byte[16];
r.nextBytes(keyBytes);
key = new SecretKeySpec(keyBytes, "AES");
keyEncoded = key.getEncoded();
}
@Override
public ByteBuffer encryptKey(SecretKeySpec toEncrypt, SecretKeySpec key) throws GeneralSecurityException {
byte[] encodedKey = toEncrypt.getEncoded();
ByteBuffer keyRecordBuffer =
ByteBuffer.allocate(KeyRecord_Format_V1.getKeyRecordSize(encodedKey, toEncrypt.getAlgorithm()));
KeyRecord_Format_V1.serializeKeyRecord(keyRecordBuffer, encodedKey, toEncrypt.getAlgorithm());
keyRecordBuffer.flip();
return encrypt(keyRecordBuffer, key);
}
private RC4Engine
getCipher(
byte[] key )
{
SecretKeySpec secret_key_spec = new SecretKeySpec( key, "RC4" );
RC4Engine rc4_engine = new RC4Engine();
CipherParameters params_a = new KeyParameter( secret_key_spec.getEncoded());
// for RC4 enc/dec is irrelevant
rc4_engine.init( true, params_a );
// skip first 1024 bytes of stream to protected against a Fluhrer, Mantin and Shamir attack
byte[] temp = new byte[1024];
rc4_engine.processBytes( temp, 0, temp.length, temp, 0 );
return( rc4_engine );
}
private RC4Engine
getCipher(
byte[] key )
{
SecretKeySpec secret_key_spec = new SecretKeySpec( key, "RC4" );
RC4Engine rc4_engine = new RC4Engine();
CipherParameters params_a = new KeyParameter( secret_key_spec.getEncoded());
// for RC4 enc/dec is irrelevant
rc4_engine.init( true, params_a );
// skip first 1024 bytes of stream to protected against a Fluhrer, Mantin and Shamir attack
byte[] temp = new byte[1024];
rc4_engine.processBytes( temp, 0, temp.length, temp, 0 );
return( rc4_engine );
}
TransportCipher(
String algorithm,
int mode,
SecretKeySpec key_spec )
throws Exception
{
if ( algorithm.equals( "RC4" )){
if ( !internal_rc4 ){
try{
cipher = Cipher.getInstance( algorithm );
cipher.init( mode, key_spec );
}catch( Throwable e ){
internal_rc4 = true;
}
}
if ( internal_rc4 ){
rc4_engine = new RC4Engine();
CipherParameters params = new KeyParameter(key_spec.getEncoded());
rc4_engine.init( mode == Cipher.ENCRYPT_MODE, params );
}
//System.out.println( "RC4 key: " + ByteFormatter.encodeString( key_spec.getEncoded()));
// skip first 1024 bytes of stream to protected against a Fluhrer, Mantin and Shamir attack
byte[] temp = new byte[1024];
temp = update( temp );
//System.out.println( "RC4: first discard = " + ByteFormatter.encodeString( temp, 0, 4 ));
}else{
cipher = Cipher.getInstance( algorithm );
cipher.init( mode, key_spec );
}
}
TransportCipher(
String algorithm,
int mode,
SecretKeySpec key_spec )
throws Exception
{
if ( algorithm.equals( "RC4" )){
if ( !internal_rc4 ){
try{
cipher = Cipher.getInstance( algorithm );
cipher.init( mode, key_spec );
}catch( Throwable e ){
internal_rc4 = true;
}
}
if ( internal_rc4 ){
rc4_engine = new RC4Engine();
CipherParameters params = new KeyParameter(key_spec.getEncoded());
rc4_engine.init( mode == Cipher.ENCRYPT_MODE, params );
}
//System.out.println( "RC4 key: " + ByteFormatter.encodeString( key_spec.getEncoded()));
// skip first 1024 bytes of stream to protected against a Fluhrer, Mantin and Shamir attack
byte[] temp = new byte[1024];
temp = update( temp );
//System.out.println( "RC4: first discard = " + ByteFormatter.encodeString( temp, 0, 4 ));
}else{
cipher = Cipher.getInstance( algorithm );
cipher.init( mode, key_spec );
}
}