public void testModule() throws Exception {
Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider()); // Add
// Create the secret/symmetric key
KeyGenerator kgen = KeyGenerator.getInstance("Blowfish");
SecretKey skey = kgen.generateKey();
byte[] raw = skey.getEncoded();
SecretKeySpec skeySpec = new SecretKeySpec(raw, "Blowfish");
// Create the cipher for encrypting
Cipher cipher = Cipher.getInstance("Blowfish");
cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
// Encrypt the data
byte[] encrypted = cipher.doFinal(plain);
// Save the encrypted data
FileOutputStream fos = new FileOutputStream(datafile);
fos.write(encrypted);
fos.close();
// Save the cipher settings
byte[] encodedKeySpec = skeySpec.getEncoded();
FileOutputStream eksos = new FileOutputStream(keyfile);
eksos.write(encodedKeySpec);
eksos.close();
// Read the encrypted data
FileInputStream fis = new FileInputStream(datafile);
byte[] temp = new byte[8192];
int bytesRead = fis.read(temp);
byte[] data = new byte[bytesRead];
System.arraycopy(temp, 0, data, 0, bytesRead);
// Read the cipher settings
FileInputStream eksis = new FileInputStream(keyfile);
bytesRead = eksis.read(temp);
encodedKeySpec = new byte[bytesRead];
System.arraycopy(temp, 0, encodedKeySpec, 0, bytesRead);
// Recreate the secret/symmetric key
skeySpec = new SecretKeySpec(encodedKeySpec, "Blowfish");
// Create the cipher for encrypting
cipher = Cipher.getInstance("Blowfish");
cipher.init(Cipher.DECRYPT_MODE, skeySpec);
// Decrypt the data
byte[] decrypted = cipher.doFinal(data);
assertTrue(Arrays.equals(decrypted, plain));
}
/**
* 解密
*
* @param content 待解密内容
* @param password 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
cipher.init(Cipher.DECRYPT_MODE, seckey); // 初始化
byte[] result = cipher.doFinal(data);
return result; // 加密
} catch (Exception e) {
throw new RuntimeException("decrypt fail!", e);
}
}
// create jason file and put some keys into it..
private static void createTokenFileJson() throws IOException {
Map<String, String> map = new HashMap<String, String>();
try {
KeyGenerator kg = KeyGenerator.getInstance("HmacSHA1");
for (int i = 0; i < NUM_OF_KEYS; i++) {
SecretKeySpec key = (SecretKeySpec) kg.generateKey();
byte[] enc_key = key.getEncoded();
map.put("alias" + i, new String(Base64.encodeBase64(enc_key)));
}
} catch (NoSuchAlgorithmException e) {
throw new IOException(e);
}
try {
File p = new File(tokenFileName.getParent().toString());
p.mkdirs();
// convert to JSON and save to the file
mapper.writeValue(new File(tokenFileName.toString()), map);
} catch (Exception e) {
System.out.println("failed with :" + e.getLocalizedMessage());
}
}