public void testKeyGen() {
RandomSource.getInstance().nextBoolean();
byte src[] = new byte[200];
RandomSource.getInstance().nextBytes(src);
I2PAppContext ctx = I2PAppContext.getGlobalContext();
for (int i = 0; i < 10; i++) {
Object keys[] = KeyGenerator.getInstance().generatePKIKeypair();
byte ctext[] = ctx.elGamalEngine().encrypt(src, (PublicKey) keys[0]);
byte ptext[] = ctx.elGamalEngine().decrypt(ctext, (PrivateKey) keys[1]);
assertTrue(DataHelper.eq(ptext, src));
}
Object obj[] = KeyGenerator.getInstance().generateSigningKeypair();
SigningPublicKey fake = (SigningPublicKey) obj[0];
for (int i = 0; i < 10; i++) {
Object keys[] = KeyGenerator.getInstance().generateSigningKeypair();
Signature sig = DSAEngine.getInstance().sign(src, (SigningPrivateKey) keys[1]);
assertTrue(DSAEngine.getInstance().verifySignature(sig, src, (SigningPublicKey) keys[0]));
assertFalse(DSAEngine.getInstance().verifySignature(sig, src, fake));
}
for (int i = 0; i < 1000; i++) {
KeyGenerator.getInstance().generateSessionKey();
}
}
/**
* Generates a random secret key using the algorithm specified in the first DataReference URI
*
* @param dataRefURIs
* @param doc
* @param wsDocInfo
* @return
* @throws WSSecurityException
*/
private static byte[] getRandomKey(List<String> dataRefURIs, Document doc, WSDocInfo wsDocInfo)
throws WSSecurityException {
try {
String alg = "AES";
int size = 16;
if (!dataRefURIs.isEmpty()) {
String uri = dataRefURIs.iterator().next();
Element ee = ReferenceListProcessor.findEncryptedDataElement(doc, uri);
String algorithmURI = X509Util.getEncAlgo(ee);
alg = JCEMapper.getJCEKeyAlgorithmFromURI(algorithmURI);
size = WSSecurityUtil.getKeyLength(algorithmURI);
}
KeyGenerator kgen = KeyGenerator.getInstance(alg);
kgen.init(size * 8);
SecretKey k = kgen.generateKey();
return k.getEncoded();
} catch (Throwable ex) {
// Fallback to just using AES to avoid attacks on EncryptedData algorithms
try {
KeyGenerator kgen = KeyGenerator.getInstance("AES");
kgen.init(128);
SecretKey k = kgen.generateKey();
return k.getEncoded();
} catch (NoSuchAlgorithmException e) {
throw new WSSecurityException(WSSecurityException.FAILED_CHECK, null, null, e);
}
}
}
/**
* 加密
*
* @param content 需要加密的内容
* @param password 加密密码
* @return
*/
public static byte[] encryptAES(String content, String password) {
try {
KeyGenerator kgen = KeyGenerator.getInstance("AES");
kgen.init(128, new SecureRandom(password.getBytes()));
SecretKey secretKey = kgen.generateKey();
byte[] enCodeFormat = secretKey.getEncoded();
SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES");
Cipher cipher = Cipher.getInstance("AES"); // 创建密码器
byte[] byteContent = content.getBytes("utf-8");
cipher.init(Cipher.ENCRYPT_MODE, key); // 初始化
byte[] result = cipher.doFinal(byteContent);
return result; // 加密
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
} catch (NoSuchPaddingException e) {
e.printStackTrace();
} catch (InvalidKeyException e) {
e.printStackTrace();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (IllegalBlockSizeException e) {
e.printStackTrace();
} catch (BadPaddingException e) {
e.printStackTrace();
}
return null;
}
private static byte[] doAes(int mode, byte[] input, String password) {
try {
KeyGenerator keygen = KeyGenerator.getInstance(AES_ALGORITHM_NAME);
keygen.init(128, new SecureRandom(password.getBytes()));
SecretKey secretKey = keygen.generateKey();
byte[] enCodeFormat = secretKey.getEncoded();
SecretKeySpec key = new SecretKeySpec(enCodeFormat, AES_ALGORITHM_NAME);
Cipher cipher = Cipher.getInstance(AES_ALGORITHM_NAME);
cipher.init(Cipher.DECRYPT_MODE, key);
return cipher.doFinal(input);
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
} catch (NoSuchPaddingException e) {
e.printStackTrace();
} catch (InvalidKeyException e) {
e.printStackTrace();
} catch (IllegalBlockSizeException e) {
e.printStackTrace();
} catch (BadPaddingException e) {
e.printStackTrace();
}
return null;
}
public static void main(String[] args) throws Exception {
//
// check args and get plaintext
if (args.length != 1) {
System.err.println("Usage: java MessageAuthenticationCodeExample text");
System.exit(1);
}
byte[] plainText = args[0].getBytes("UTF8");
//
// get a key for the HmacMD5 algorithm
System.out.println("\nStart generating key");
KeyGenerator keyGen = KeyGenerator.getInstance("HmacMD5");
SecretKey MD5key = keyGen.generateKey();
System.out.println("Finish generating key");
//
// get a MAC object and update it with the plaintext
Mac mac = Mac.getInstance("HmacMD5");
mac.init(MD5key);
mac.update(plainText);
//
// print out the provider used and the MAC
System.out.println("\n" + mac.getProvider().getInfo());
System.out.println("\nMAC: ");
System.out.println(new String(mac.doFinal(), "UTF8"));
}
public static SecretKey getSecretKey() throws EncryptionException {
SecretKey key = null;
try {
key = KeyGenerator.getInstance(ALGO).generateKey();
} catch (NoSuchAlgorithmException e) {
throw new EncryptionException("Cannot generate a secret key" + '\n' + e.getMessage());
}
return key;
}
public static String getStringKey() throws EncryptionException {
SecretKey key = null;
try {
key = KeyGenerator.getInstance(ALGO).generateKey();
} catch (NoSuchAlgorithmException e) {
throw new EncryptionException("Cannot generate a secret key" + '\n' + e.getMessage());
}
return Base64.encodeBase64String(key.getEncoded());
}
private static SecretKey generateSymmetricKey() throws Exception {
KeyGenerator generator = KeyGenerator.getInstance(KEY_ALGORITHM);
SecureRandom random = new SecureRandom();
generator.init(KEY_LENGTH_BITS, random);
logger.debug("Generate Key");
return generator.generateKey();
// return new SecretKeySpec(Hex.decodeHex("cb024600dce7148b8ddc5d6c111fbd85".toCharArray()),
// KEY_ALGORITHM);
}
public void inicializarSeguridad() {
// Generar la llave
try {
KeyGenerator keygen = KeyGenerator.getInstance("DES");
desKey = keygen.generateKey();
// Iniciar un objeto para la encr / desencr
desCipher = Cipher.getInstance("DES/ECB/PKCS5Padding");
} catch (Exception e) {
}
}
@Override
public SymmetricKey createKey() {
KeyGenerator kgen;
try {
kgen = KeyGenerator.getInstance("AES");
kgen.init(256);
final SecretKey skey = kgen.generateKey();
return new AES256SymmetricKey(skey.getEncoded());
} catch (final NoSuchAlgorithmException e) {
throw new RuntimeException(e);
}
}
public static void main(String[] args) throws Exception {
BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
// get user inputted key
byte[] userkey = null;
do {
System.out.println("Please enter a 8 character string to generate a Secret Key");
userkey = (in.readLine()).getBytes();
} while (userkey.length != 8);
// create Key Generator instance and generate a secret key
KeyGenerator kgen = KeyGenerator.getInstance("DES");
SecretKey skey = kgen.generateKey();
byte[] key = userkey;
// Create a Secret Key based on characters entered by the user
SecretKeySpec skeyspec = new SecretKeySpec(key, "DES");
// Create a cipher to encrypt with
Cipher cipher = Cipher.getInstance("DES/ECB/PKCS5Padding");
cipher.init(Cipher.ENCRYPT_MODE, skeyspec);
// Get message
System.out.println("Please enter a string to encrypt");
byte[] userstring = null;
userstring = (in.readLine()).getBytes();
// Encrypt message with cipher
byte[] encrypted = cipher.doFinal(userstring);
String enc_string = new String(encrypted);
System.out.println("The String is encrypted as " + enc_string);
byte[] userdecrypt = null;
byte[] decrypted = null;
// Get user decrypt key
do {
System.out.println("Please enter the 8 character key to decrypt the message");
userdecrypt = (in.readLine()).getBytes();
} while (userdecrypt.length != 8);
// Reinitialize Secret Key and Cipher
key = userdecrypt;
SecretKeySpec decryptkey = new SecretKeySpec(key, "DES");
cipher.init(Cipher.DECRYPT_MODE, decryptkey);
// Decrypt message
decrypted = cipher.doFinal(encrypted);
if ((new String(decrypted)).equals(new String(userstring)))
System.out.println("\nMessage decrypted as: " + (new String(decrypted)));
else System.out.println("\nMessage was not decrypted");
}
public void generate_new_aes_key() {
try {
KeyGenerator localKeyGenerator = KeyGenerator.getInstance("AES");
localKeyGenerator.init(128, SecureRandom.getInstance("SHA1PRNG"));
// aes_key = Base64.encodeBase64String(localKeyGenerator.generateKey().getEncoded());
aes_key =
new String(Base64.encode(localKeyGenerator.generateKey().getEncoded(), Base64.DEFAULT));
} catch (NoSuchAlgorithmException localNoSuchAlgorithmException) {
System.out.println(localNoSuchAlgorithmException);
}
return;
}
public Encrypter() {
try {
SecretKey key = KeyGenerator.getInstance("DES").generateKey();
ecipher = Cipher.getInstance("DES");
dcipher = Cipher.getInstance("DES");
ecipher.init(Cipher.ENCRYPT_MODE, key);
dcipher.init(Cipher.DECRYPT_MODE, key);
} catch (javax.crypto.NoSuchPaddingException e) {
} catch (java.security.NoSuchAlgorithmException e) {
} catch (java.security.InvalidKeyException e) {
}
}
/** Creates a new instance of Encrypter */
public AltEncrypter(String passPhrase) {
try {
SecureRandom sr = SecureRandom.getInstance("SHA1PRNG");
sr.setSeed(passPhrase.getBytes("UTF8"));
KeyGenerator kGen = KeyGenerator.getInstance("DESEDE");
kGen.init(168, sr);
Key key = kGen.generateKey();
cipherEncrypt = Cipher.getInstance("DESEDE/ECB/PKCS5Padding");
cipherEncrypt.init(Cipher.ENCRYPT_MODE, key);
cipherDecrypt = Cipher.getInstance("DESEDE/ECB/PKCS5Padding");
cipherDecrypt.init(Cipher.DECRYPT_MODE, key);
} catch (UnsupportedEncodingException e) {
} catch (NoSuchPaddingException e) {
} catch (NoSuchAlgorithmException e) {
} catch (InvalidKeyException e) {
}
}
@SuppressWarnings("restriction")
public String getencrypt(String p) throws Exception {
String encrypted = "";
try {
KeyGenerator kgen = KeyGenerator.getInstance("AES");
kgen.init(128, new SecureRandom(KEY.getBytes()));
SecretKey skey = kgen.generateKey();
byte[] raw = skey.getEncoded();
SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
Cipher cipher = Cipher.getInstance("AES");
cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
byte[] encrypt = cipher.doFinal(p.getBytes());
encrypted = new BASE64Encoder().encodeBuffer(encrypt).trim();
// System.out.println("encrypted="+encrypted);
} // try
catch (Exception e) {
System.out.println(e);
}
return encrypted; // return 密文
}
public String getdecrypt(String base64) throws Exception {
String decrypted = "";
try {
@SuppressWarnings("restriction")
byte[] b = new BASE64Decoder().decodeBuffer(base64);
KeyGenerator kgen2 = KeyGenerator.getInstance("AES");
kgen2.init(128, new SecureRandom(KEY.getBytes()));
SecretKey skey2 = kgen2.generateKey();
byte[] raw2 = skey2.getEncoded();
SecretKeySpec skeySpec2 = new SecretKeySpec(raw2, "AES");
Cipher cipher2 = Cipher.getInstance("AES");
cipher2.init(Cipher.DECRYPT_MODE, skeySpec2);
byte[] decrypt = cipher2.doFinal(b);
decrypted = new String(decrypt);
// System.out.println("decrypted="+decrypted);
} catch (Exception e) {
System.out.println(e);
}
return decrypted;
}
public static void main(String[] args) {
try {
if (args[0].equals("-genkey")) {
KeyPairGenerator pairgen = KeyPairGenerator.getInstance("RSA");
SecureRandom random = new SecureRandom();
pairgen.initialize(KEYSIZE, random);
KeyPair keyPair = pairgen.generateKeyPair();
ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream(args[1]));
out.writeObject(keyPair.getPublic());
out.close();
out = new ObjectOutputStream(new FileOutputStream(args[2]));
out.writeObject(keyPair.getPrivate());
out.close();
} else if (args[0].equals("-encrypt")) {
KeyGenerator keygen = KeyGenerator.getInstance("AES");
SecureRandom random = new SecureRandom();
keygen.init(random);
SecretKey key = keygen.generateKey();
// wrap with RSA public key
ObjectInputStream keyIn = new ObjectInputStream(new FileInputStream(args[3]));
Key publicKey = (Key) keyIn.readObject();
keyIn.close();
Cipher cipher = Cipher.getInstance("RSA");
cipher.init(Cipher.WRAP_MODE, publicKey);
byte[] wrappedKey = cipher.wrap(key);
DataOutputStream out = new DataOutputStream(new FileOutputStream(args[2]));
out.writeInt(wrappedKey.length);
out.write(wrappedKey);
InputStream in = new FileInputStream(args[1]);
cipher = Cipher.getInstance("AES");
cipher.init(Cipher.ENCRYPT_MODE, key);
crypt(in, out, cipher);
in.close();
out.close();
} else {
DataInputStream in = new DataInputStream(new FileInputStream(args[1]));
int length = in.readInt();
byte[] wrappedKey = new byte[length];
in.read(wrappedKey, 0, length);
// unwrap with RSA private key
ObjectInputStream keyIn = new ObjectInputStream(new FileInputStream(args[3]));
Key privateKey = (Key) keyIn.readObject();
keyIn.close();
Cipher cipher = Cipher.getInstance("RSA");
cipher.init(Cipher.UNWRAP_MODE, privateKey);
Key key = cipher.unwrap(wrappedKey, "AES", Cipher.SECRET_KEY);
OutputStream out = new FileOutputStream(args[2]);
cipher = Cipher.getInstance("AES");
cipher.init(Cipher.DECRYPT_MODE, key);
crypt(in, out, cipher);
in.close();
out.close();
}
} catch (IOException e) {
e.printStackTrace();
} catch (GeneralSecurityException e) {
e.printStackTrace();
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
}
/**
* Constructs a new QuickChipher with the given transformation and algorithm.
*
* @param transformation the transformation to be used to create the Cipher for this QuickCipher.
* @param algorithm the algorithm to be used to create the SecretKey for this QuickCipher.
* @throws NoSuchAlgorithmException if transformation is null, empty, in an invalid format, or if
* no Provider supports a CipherSpi implementation for the specified algorithm or if no
* Provider supports a KeyGeneratorSpi implementation for the specified algorithm.
* @throws NoSuchPaddingException if transformation contains a padding scheme that is not
* available.
*/
public QuickCipher(String transformation, String algorithm)
throws NoSuchAlgorithmException, NoSuchPaddingException {
this.algorithm = algorithm;
cipher = Cipher.getInstance(transformation);
key = KeyGenerator.getInstance(this.algorithm).generateKey();
}