Java Code Examples for org.bouncycastle.crypto.macs.HMac#doFinal()

/**
 * Recover a private key from a generated mnemonic phrase and a passphrase.
 * <p>
 * This is not compatible with the phrases generated by the Android and iOS wallets;
 * use the no-passphrase version instead.
 *
 * @param mnemonic   the mnemonic phrase which should be a 24 byte list of words.
 * @param passphrase the passphrase used to protect the mnemonic (not used in the
 *                   mobile wallets, use {@link #fromMnemonic(Mnemonic)} instead.)
 * @return the recovered key; use {@link #derive(int)} to get a key for an account index (0
 * for default account)
 */
public static Ed25519PrivateKey fromMnemonic(Mnemonic mnemonic, String passphrase) {
    final byte[] seed = mnemonic.toSeed(passphrase);

    final HMac hmacSha512 = new HMac(new SHA512Digest());
    hmacSha512.init(new KeyParameter("ed25519 seed".getBytes(StandardCharsets.UTF_8)));
    hmacSha512.update(seed, 0, seed.length);

    final byte[] derivedState = new byte[hmacSha512.getMacSize()];
    hmacSha512.doFinal(derivedState, 0);

    Ed25519PrivateKey derivedKey = derivableKey(derivedState);

    // BIP-44 path with the Hedera Hbar coin-type (omitting key index)
    // we pre-derive most of the path as the mobile wallets don't expose more than the index
    // https://github.com/bitcoin/bips/blob/master/bip-0044.mediawiki
    // https://github.com/satoshilabs/slips/blob/master/slip-0044.md
    for (int index : new int[]{44, 3030, 0, 0}) {
        derivedKey = derivedKey.derive(index);
    }

    return derivedKey;
}
 

public LibraKeyFactory(Seed seed) {
    byte[] data = new byte[32];
    SHA3Digest sha3 = new SHA3Digest(256);
    HMac mac = new HMac(sha3);
    mac.init(new KeyParameter(MASTER_KEY_SALT));
    mac.update(seed.getData(), 0, seed.getData().length);
    mac.doFinal(data, 0);

    this.master = new Master(data);
}
 

public static Mac getHmac(Digest digest, byte[] key) {
    KeyParameter keyParameter = new KeyParameter(key);
    HMac hmac = new HMac(new SM3Digest());
    hmac.init(keyParameter);

    return new Mac() {
        @Override
        public byte[] doFinal(byte[] bytes) {
            hmac.update(bytes, 0, bytes.length);
            byte[] result = new byte[hmac.getMacSize()];
            hmac.doFinal(result, 0);
            return result;
        }
    };

}
 

@Test
public void test() {
    String iv = "00000000000000000000000000000000";
    String pubKeyA = "0410baeeb267e1d680adf4e2ad0eb61b6a3173657971c0209425406883f09ac639c7dad2baf8ab2d66e6b64c3cbd4dd488de91cc47b5ead45db299a929c4ebd468";
    String ciphertext = "b4d6ecbd61b3630abf609e102fcbd125";
    String dataToMac = iv + pubKeyA + ciphertext;
    String macKey = "785ac461b5c8607c39ec4f63e1004f19a77c371e6f91293f66d4c19c02524265";
    HMac mac = new HMac(new SHA256Digest());
    mac.init(new KeyParameter(HexUtil.decode(macKey)));

    byte[] byteArray = HexUtil.decode(dataToMac);
    mac.update(byteArray, 0, byteArray.length);
    byte[] macOutput = new byte[mac.getMacSize()];
    mac.doFinal(macOutput, 0);
    System.out.println(HexUtil.encode(macOutput));
    // hmac hex string: bcf0e6f47bf5622e3596104f4d1bcd0bc4f643a196f0520be834bb0b4d1043fa
}
 

/**
 * Generates the current token. If the token can't be generated it returns
 * an empty String.
 * 
 * @return current token or an empty String
 */
protected static String genToken(final long counter, final HMac hmac, final int digits) {
	if (hmac == null || digits <= 0) {
		return "";
	}

	// generate 8 byte HOTP counter value (RFC 4226)
	final byte msg[] = new byte[8];
	for (int i = 0; i < 8; i++) {
		msg[7 - i] = (byte) (counter >>> (i * 8));
	}

	// compute the HMAC
	final byte[] hash = new byte[hmac.getMacSize()];
	hmac.update(msg, 0, msg.length);
	hmac.doFinal(hash, 0);

	// Transform the HMAC to a HOTP value according to RFC 4226.
	final int off = hash[hash.length - 1] & 0xF;
	// Truncate the HMAC (look at RFC 4226 section 5.3, step 2).
	int binary = ((hash[off] & 0x7f) << 24) | ((hash[off + 1] & 0xff) << 16) | ((hash[off + 2] & 0xff) << 8)
			| ((hash[off + 3] & 0xff));

	// use requested number of digits
	final byte[] digitsArray = new byte[digits];
	for (int i = 0; i < digits; i++) {
		digitsArray[digits - 1 - i] = (byte) ('0' + (char) (binary % 10));
		binary /= 10;
	}
	return new String(digitsArray, 0, digits);
}
 

public static void bcHmacMD5()
{
	HMac hmac = new HMac(new MD5Digest());
	// 必须是16进制的字符，长度必须是2的倍数
	hmac.init(new KeyParameter(org.bouncycastle.util.encoders.Hex.decode("123456789abcde")));
	hmac.update(src.getBytes(), 0, src.getBytes().length);
	
	// 执行摘要
	byte[] hmacMD5Bytes = new byte[hmac.getMacSize()];
	hmac.doFinal(hmacMD5Bytes, 0);
	System.out.println("bc hmacMD5:" + org.bouncycastle.util.encoders.Hex.toHexString(hmacMD5Bytes));
	
}
 

public static byte[] generateHmac512(byte[] key, String msg) throws UnsupportedEncodingException {

		HMac hmac = new HMac(new SHA512Digest());
		byte[] result = new byte[hmac.getMacSize()];
		byte[] msgAry = msg.getBytes("UTF-8");
		hmac.init(new KeyParameter(key));
		hmac.reset();
		hmac.update(msgAry, 0, msgAry.length);
		hmac.doFinal(result, 0);
		return result;
	}
 

public static byte[] generateHmac(byte[] key, byte[] msg) throws UnsupportedEncodingException {

		HMac hmac = new HMac(new SHA256Digest());
		byte[] result = new byte[hmac.getMacSize()];
		hmac.init(new KeyParameter(key));
		hmac.reset();
		hmac.update(msg, 0, msg.length);
		hmac.doFinal(result, 0);
		return result;
	}
 

public static byte[] generateHmac(byte[] key, String msg) throws UnsupportedEncodingException {

		HMac hmac = new HMac(new SHA256Digest());
		byte[] result = new byte[hmac.getMacSize()];
		byte[] msgAry = msg.getBytes("UTF-8");
		hmac.init(new KeyParameter(key));
		hmac.reset();
		hmac.update(msgAry, 0, msgAry.length);
		hmac.doFinal(result, 0);
		return result;
	}
 

public static byte[] hmacSha512(byte[] key, byte[] input) {
    HMac hMac = new HMac(new SHA512Digest());
    hMac.init(new KeyParameter(key));
    hMac.update(input, 0, input.length);
    byte[] out = new byte[64];
    hMac.doFinal(out, 0);
    return out;
}
 

public static byte[] hmacSha256(byte[] key, byte[] data, int outputLength) {
  HMac hmac = new HMac(new SHA256Digest());
  hmac.init(new KeyParameter(key));
  hmac.update(data, 0, data.length);
  byte[] output = new byte[hmac.getMacSize()];
  hmac.doFinal(output, 0);
  return Arrays.copyOf(output, outputLength);
}
 

public static byte[] hmacSha512(byte[] key, byte[] input) {
    HMac hMac = new HMac(new SHA512Digest());
    hMac.init(new KeyParameter(key));
    hMac.update(input, 0, input.length);
    byte[] out = new byte[64];
    hMac.doFinal(out, 0);
    return out;
}
 

public static byte[] hmac(byte[] data, byte[] macKey) {
    HMac mac = new HMac(new SHA256Digest());
    mac.init(new KeyParameter(macKey));
    mac.update(data, 0, data.length);
    byte[] macOutput = new byte[mac.getMacSize()];
    mac.doFinal(macOutput, 0);
    return macOutput;
}
 

@Override
public byte[] hmacSha384(byte[] m, byte[] key) {
	validateHmacSha384(m, key);

	Digest digest = new SHA384Digest();
	HMac hmac = new HMac(digest);

	hmac.init(new KeyParameter(key));
	byte[] out = new byte[hmac.getMacSize()];
	hmac.update(m, 0, m.length);
	hmac.doFinal(out, 0);
	return out;
}
 

public static byte[] hmac(byte[] key, byte[] srcData) {
    KeyParameter keyParameter = new KeyParameter(key);
    SM3Digest digest = new SM3Digest();
    HMac mac = new HMac(digest);
    mac.init(keyParameter);
    mac.update(srcData, 0, srcData.length);
    byte[] result = new byte[mac.getMacSize()];
    mac.doFinal(result, 0);
    return result;
}
 

/**
 * 计算SM3 Mac值
 *
 * @param key     key值，可以是任意长度的字节数组
 * @param srcData 原文
 * @return Mac值，对于HMac-SM3来说是32字节
 */
public static byte[] hmac(byte[] key, byte[] srcData) {
    KeyParameter keyParameter = new KeyParameter(key);
    SM3Digest digest = new SM3Digest();
    HMac mac = new HMac(digest);
    mac.init(keyParameter);
    mac.update(srcData, 0, srcData.length);
    byte[] result = new byte[mac.getMacSize()];
    mac.doFinal(result, 0);
    return result;
}
 

public static byte[] hmacSha512(byte[] keyBytes, byte[] text) {
	HMac hmac = new HMac(new SHA512Digest());
	byte[] resBuf = new byte[hmac.getMacSize()];
	CipherParameters pm = new KeyParameter(keyBytes);
	hmac.init(pm);
	hmac.update(text, 0, text.length);
	hmac.doFinal(resBuf, 0);
	return resBuf;
}
 

static byte[] calcHmacSha384(KeyParameter cipherKey, byte[] input) {
    final HMac hmacSha384 = new HMac(new SHA384Digest());
    final byte[] output = new byte[hmacSha384.getMacSize()];

    hmacSha384.init(new KeyParameter(cipherKey.getKey(), 16, 16));
    hmacSha384.update(input, 0, input.length);
    hmacSha384.doFinal(output, 0);

    return output;
}
 

@Override
public Object apply(WarpScriptStack stack) throws WarpScriptException {
  Object top = stack.pop();

  if (!(top instanceof byte[])) {
    throw new WarpScriptException(getName() + " expects a byte array (key) on top of the stack.");
  }

  byte[] key = (byte[]) top;

  top = stack.pop();

  if (!(top instanceof byte[])) {
    throw new WarpScriptException(getName() + " operates on a byte array.");
  }

  byte[] bytes = (byte[]) top;

  try {
    HMac m = new HMac((Digest) digestAlgo.newInstance());

    m.init(new KeyParameter(key));

    m.update(bytes,0,bytes.length);

    byte[] mac=new byte[m.getMacSize()];

    m.doFinal(mac,0);

    stack.push(mac);

    return stack;
  } catch (Exception exp) {
    throw new WarpScriptException(getName() + " unable to instantiate message digest", exp);
  }
}