Example usage for org.bouncycastle.util Arrays copyOfRange

Introduction

In this page you can find the example usage for org.bouncycastle.util Arrays copyOfRange.

Prototype

public static BigInteger[] copyOfRange(BigInteger[] original, int from, int to) 

Source Link

Usage

From source file:org.ethereum.vm.DataWord.java

License:Open Source License

public byte[] getLast20Bytes() {
    return Arrays.copyOfRange(data, 12, data.length);
}

---

From source file:org.gity.internal.crypto.CPCipher.java

License:Open Source License

/**
 * Decrypts a given file with ChaCha20 w/ Poly1305 as MAC in
 * encrypt-then-MAC scheme.//from   w  ww .j a va  2  s  .c om
 * <p>
 * Reads data from the InputStream and writes the decrypted data to the
 * OutputStream
 *
 * @param key
 * @param nonce
 * @param input
 * @param output
 * @throws IOException
 */
public void decrypt(byte[] key, byte[] nonce, InputStream input, OutputStream output) throws IOException {
    this.cipher.init(false, new ParametersWithIV(new KeyParameter(key), nonce));
    byte[] computedMac = new byte[16], receivedMac = new byte[16], readBuf = new byte[BUFFER_SIZE],
            chachaBuf = new byte[BUFFER_SIZE];
    initMAC(cipher);

    int r = 0;
    while ((r = input.read(readBuf)) != -1) {
        // case when EOF has not been reached
        if (r == BUFFER_SIZE) {
            // use C in whole to update the MAC and decrypt
            updateMAC(readBuf, 0, r);
            cipher.processBytes(readBuf, 0, r, chachaBuf, 0);
            output.write(chachaBuf, 0, r);
        } else {
            // use all but the last 16 bytes from C to update the MAC and decrypt
            updateMAC(Arrays.copyOfRange(readBuf, 0, r - 16), 0, r - 16);
            cipher.processBytes(Arrays.copyOfRange(readBuf, 0, r - 16), 0, r - 16, chachaBuf, 0);
            output.write(chachaBuf, 0, r - 16);

            // copy the last 16 bytes as the original MAC
            receivedMac = Arrays.copyOfRange(readBuf, r - 16, r);
        }
    }

    // check if the two MACs match
    mac.doFinal(computedMac, 0);
    if (!Arrays.constantTimeAreEqual(computedMac, receivedMac)) {
        throw new TlsFatalAlert(AlertDescription.bad_record_mac);
    }
}

---

From source file:org.hyperledger.account.ShamirsSecretShares.java

License:Apache License

/**
 * Reconstruct a secret from a collection of shares. Provided they are suffcient.
 *
 * @param shares an array of secret shares
 * @return secret if successfully recreated. The algorithm can not check for success if the shares ver not created with verbose serialization.
 * @throws HyperLedgerException/*w w w  . ja  v a  2 s  . c om*/
 */
public static PrivateKey reconstruct(String[] shares) throws HyperLedgerException {
    SecretShare ss[] = new SecretShare[shares.length];

    boolean comp = true;
    for (int i = 0; i < shares.length; ++i) {
        byte[] raw = ByteUtils.fromBase58WithChecksum(shares[i]);
        byte[] prefix = Arrays.copyOfRange(raw, 0, 2);
        boolean verbose = Arrays.areEqual(prefix, compressed) || !Arrays.areEqual(prefix, legacy);
        if (!verbose && !Arrays.areEqual(prefix, compressedShort) && !Arrays.areEqual(prefix, legacyShort)) {
            throw new HyperLedgerException("Not a key share");
        }
        ss[i] = new SecretShare();
        ss[i].shareNumber = raw[2] & 0xff;
        ss[i].share = new BigInteger(1, Arrays.copyOfRange(raw, verbose ? 6 : 3, 40));
        comp = raw[1] == compressed[1];
    }
    return new PrivateKey(ss256.reconstruct(ss), comp);
}

---

From source file:org.hyperledger.common.MasterPrivateKey.java

License:Apache License

/**
 * Create a MasterPrivateKey from a plain text seed. The seed is stretched/resized to 64 bytes with HmacSHA512
 *
 * @param seed arbitrary data/*from   w ww.  j  av  a  2s .  c  o  m*/
 * @return (re-)created MasterPrivateKey
 * @throws HyperLedgerException for any error in called crypto libraries
 */
public static MasterPrivateKey create(byte[] seed) throws HyperLedgerException {
    try {
        Mac mac = Mac.getInstance("HmacSHA512", "BC");
        SecretKey seedkey = new SecretKeySpec(BITCOIN_SEED, "HmacSHA512");
        mac.init(seedkey);
        byte[] lr = mac.doFinal(seed);
        byte[] l = Arrays.copyOfRange(lr, 0, 32);
        byte[] r = Arrays.copyOfRange(lr, 32, 64);
        BigInteger m = new BigInteger(1, l);
        if (m.compareTo(curve.getN()) >= 0 || m.compareTo(BigInteger.ZERO) == 0) {
            throw new HyperLedgerException("This is rather unlikely, but it did just happen");
        }
        PrivateKey keyPair = new PrivateKey(m, true);
        return new MasterPrivateKey(keyPair, r, 0, 0, 0);
    } catch (NoSuchAlgorithmException | InvalidKeyException | NoSuchProviderException e) {
        throw new HyperLedgerException(e);
    }
}

---

From source file:org.hyperledger.common.MasterPrivateKey.java

License:Apache License

/**
 * Re-create a MasterPrivateKey from encrypted serialization
 *
 * @param passphrase passphrase/*  ww  w . j  av  a 2  s.  c o m*/
 * @param encrypted  cipher text from encrypt
 * @return
 * @throws HyperLedgerException error in used libraries or wrong format
 */
public static MasterPrivateKey decrypt(String passphrase, byte[] encrypted) throws HyperLedgerException {
    try {
        byte[] key = SCrypt.generate(passphrase.getBytes("UTF-8"), BITCOIN_SEED, 16384, 8, 8, 32);
        SecretKeySpec keyspec = new SecretKeySpec(key, "AES");
        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding", "BC");
        byte[] iv = Arrays.copyOfRange(encrypted, 0, 16);
        byte[] data = Arrays.copyOfRange(encrypted, 16, encrypted.length);
        cipher.init(Cipher.DECRYPT_MODE, keyspec, new IvParameterSpec(iv));
        return MasterPrivateKey.parse(new String(cipher.doFinal(data)));
    } catch (UnsupportedEncodingException | InvalidAlgorithmParameterException | NoSuchPaddingException
            | NoSuchProviderException | NoSuchAlgorithmException | InvalidKeyException | BadPaddingException
            | IllegalBlockSizeException e) {
        throw new HyperLedgerException(e);
    }
}

---

From source file:org.hyperledger.common.MasterPrivateKey.java

License:Apache License

private MasterPrivateKey generateKey(int sequence) throws HyperLedgerException {
    try {/*from w  w  w.java 2 s .c om*/
        Mac mac = Mac.getInstance("HmacSHA512", "BC");
        SecretKey key = new SecretKeySpec(chainCode, "HmacSHA512");
        mac.init(key);

        byte[] extended;
        byte[] pub = master.getPublic().toByteArray();
        if ((sequence & 0x80000000) == 0) {
            extended = new byte[pub.length + 4];
            System.arraycopy(pub, 0, extended, 0, pub.length);
            extended[pub.length] = (byte) ((sequence >>> 24) & 0xff);
            extended[pub.length + 1] = (byte) ((sequence >>> 16) & 0xff);
            extended[pub.length + 2] = (byte) ((sequence >>> 8) & 0xff);
            extended[pub.length + 3] = (byte) (sequence & 0xff);
        } else {
            byte[] priv = master.toByteArray();
            extended = new byte[priv.length + 5];
            System.arraycopy(priv, 0, extended, 1, priv.length);
            extended[priv.length + 1] = (byte) ((sequence >>> 24) & 0xff);
            extended[priv.length + 2] = (byte) ((sequence >>> 16) & 0xff);
            extended[priv.length + 3] = (byte) ((sequence >>> 8) & 0xff);
            extended[priv.length + 4] = (byte) (sequence & 0xff);
        }
        byte[] lr = mac.doFinal(extended);
        byte[] l = Arrays.copyOfRange(lr, 0, 32);
        byte[] r = Arrays.copyOfRange(lr, 32, 64);

        BigInteger m = new BigInteger(1, l);
        if (m.compareTo(curve.getN()) >= 0 || m.compareTo(BigInteger.ZERO) == 0) {
            throw new HyperLedgerException("This is rather unlikely, but it did just happen");
        }
        BigInteger k = m.add(new BigInteger(1, master.toByteArray())).mod(curve.getN());
        if (k.compareTo(BigInteger.ZERO) == 0) {
            throw new HyperLedgerException("This is rather unlikely, but it did just happen");
        }
        return new MasterPrivateKey(new PrivateKey(k, true), r, depth, parent, sequence);
    } catch (NoSuchAlgorithmException | InvalidKeyException | NoSuchProviderException e) {
        throw new HyperLedgerException(e);
    }
}

---

From source file:org.hyperledger.common.MasterPrivateKey.java

License:Apache License

/**
 * Recreate a key from BIP32 serialization
 *
 * @param serialized/*  www  .  j a v a  2 s . c o m*/
 * @return MasterPrivateKey
 * @throws HyperLedgerException
 */
public static MasterPrivateKey parse(String serialized) throws HyperLedgerException {
    byte[] data = ByteUtils.fromBase58WithChecksum(serialized);
    if (data.length != 78) {
        throw new HyperLedgerException("invalid master key");
    }
    byte[] type = Arrays.copyOf(data, 4);
    if (!Arrays.areEqual(type, xprv) && !Arrays.areEqual(type, tprv)) {
        throw new HyperLedgerException("invalid magic number for a master private key");
    }

    int depth = data[4] & 0xff;

    int parent = data[5] & 0xff;
    parent <<= 8;
    parent |= data[6] & 0xff;
    parent <<= 8;
    parent |= data[7] & 0xff;
    parent <<= 8;
    parent |= data[8] & 0xff;

    int sequence = data[9] & 0xff;
    sequence <<= 8;
    sequence |= data[10] & 0xff;
    sequence <<= 8;
    sequence |= data[11] & 0xff;
    sequence <<= 8;
    sequence |= data[12] & 0xff;

    byte[] chainCode = Arrays.copyOfRange(data, 13, 13 + 32);
    byte[] pubOrPriv = Arrays.copyOfRange(data, 13 + 32, data.length);
    return new MasterPrivateKey(new PrivateKey(new BigInteger(1, pubOrPriv), true), chainCode, depth, parent,
            sequence);
}

---

From source file:org.hyperledger.common.MasterPublicKey.java

License:Apache License

/**
 * Re-create a MasterPublicKey from encrypted serialization.
 *
 * @param passphrase - passphrase//from w ww.j a va  2  s  . c o m
 * @param encrypted  - the cipher text returned by encrypt
 * @return
 * @throws HyperLedgerException error in used libraries or wrong format
 */
public static MasterPublicKey decrypt(String passphrase, byte[] encrypted) throws HyperLedgerException {
    try {
        byte[] key = SCrypt.generate(passphrase.getBytes("UTF-8"), BITCOIN_SEED, 16384, 8, 8, 32);
        SecretKeySpec keyspec = new SecretKeySpec(key, "AES");
        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding", "BC");
        byte[] iv = Arrays.copyOfRange(encrypted, 0, 16);
        byte[] data = Arrays.copyOfRange(encrypted, 16, encrypted.length);
        cipher.init(Cipher.DECRYPT_MODE, keyspec, new IvParameterSpec(iv));
        return MasterPublicKey.parse(new String(cipher.doFinal(data)));
    } catch (UnsupportedEncodingException | InvalidAlgorithmParameterException | NoSuchPaddingException
            | NoSuchProviderException | NoSuchAlgorithmException | InvalidKeyException | BadPaddingException
            | IllegalBlockSizeException e) {
        throw new HyperLedgerException(e);
    }
}

---

From source file:org.hyperledger.common.MasterPublicKey.java

License:Apache License

private MasterPublicKey generateKey(int sequence) throws HyperLedgerException {
    try {/*from   w w  w  .ja va 2 s . com*/
        if ((sequence & 0x80000000) != 0) {
            throw new HyperLedgerException("need private key for hardened generation");
        }
        Mac mac = Mac.getInstance("HmacSHA512", "BC");
        SecretKey key = new SecretKeySpec(chainCode, "HmacSHA512");
        mac.init(key);

        byte[] extended;
        byte[] pub = master.toByteArray();
        extended = new byte[pub.length + 4];
        System.arraycopy(pub, 0, extended, 0, pub.length);
        extended[pub.length] = (byte) ((sequence >>> 24) & 0xff);
        extended[pub.length + 1] = (byte) ((sequence >>> 16) & 0xff);
        extended[pub.length + 2] = (byte) ((sequence >>> 8) & 0xff);
        extended[pub.length + 3] = (byte) (sequence & 0xff);
        byte[] lr = mac.doFinal(extended);
        byte[] l = Arrays.copyOfRange(lr, 0, 32);
        byte[] r = Arrays.copyOfRange(lr, 32, 64);

        BigInteger m = new BigInteger(1, l);
        if (m.compareTo(curve.getN()) >= 0 || m.compareTo(BigInteger.ZERO) == 0) {
            throw new HyperLedgerException("This is rather unlikely, but it did just happen");
        }
        ECPoint q = curve.getG().multiply(m).add(curve.getCurve().decodePoint(pub));
        if (q.isInfinity()) {
            throw new HyperLedgerException("This is rather unlikely, but it did just happen");
        }
        pub = q.getEncoded(true);
        return new MasterPublicKey(new PublicKey(pub, true), r, depth, parent, sequence);
    } catch (NoSuchAlgorithmException | InvalidKeyException | NoSuchProviderException e) {
        throw new HyperLedgerException(e);
    }
}

---

From source file:org.hyperledger.common.MasterPublicKey.java

License:Apache License

/**
 * Parse a MasterPublickey from its BIP32 compliant serialization.
 *
 * @param serialized a Base58 string//from  w  w  w  .ja  v  a  2s.  c om
 * @return a master key
 * @throws HyperLedgerException for invalid format
 */
public static MasterPublicKey parse(String serialized) throws HyperLedgerException {
    byte[] data = ByteUtils.fromBase58WithChecksum(serialized);
    if (data.length != 78) {
        throw new HyperLedgerException("invalid extended key");
    }
    byte[] type = Arrays.copyOf(data, 4);
    if (!Arrays.areEqual(type, xpub) && !Arrays.areEqual(type, tpub)) {
        throw new HyperLedgerException("invalid magic number for an master public key");
    }

    int depth = data[4] & 0xff;

    int parent = data[5] & 0xff;
    parent <<= 8;
    parent |= data[6] & 0xff;
    parent <<= 8;
    parent |= data[7] & 0xff;
    parent <<= 8;
    parent |= data[8] & 0xff;

    int sequence = data[9] & 0xff;
    sequence <<= 8;
    sequence |= data[10] & 0xff;
    sequence <<= 8;
    sequence |= data[11] & 0xff;
    sequence <<= 8;
    sequence |= data[12] & 0xff;

    byte[] chainCode = Arrays.copyOfRange(data, 13, 13 + 32);
    byte[] pubOrPriv = Arrays.copyOfRange(data, 13 + 32, data.length);
    return new MasterPublicKey(new PublicKey(pubOrPriv, true), chainCode, depth, parent, sequence);
}

---

• «
• 1
• 2
• 3
• 4
• 5
• 6
• 7
• »