Example usage for org.bouncycastle.crypto.digests SHA256Digest SHA256Digest

Introduction

In this page you can find the example usage for org.bouncycastle.crypto.digests SHA256Digest SHA256Digest.

Prototype

public SHA256Digest() 

Source Link

Document

Standard constructor

Usage

From source file:org.pwsafe.lib.crypto.SHA256Pws.java

License:Open Source License

public static byte[] digest(byte[] incoming) {

    SHA256Digest digest = new SHA256Digest();
    byte[] output = new byte[digest.getDigestSize()];

    digest.update(incoming, 0, incoming.length);
    digest.doFinal(output, 0);/*w w w .  j ava  2s  .c o m*/

    return output;

}

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From source file:org.pwsafe.lib.crypto.SHA256Pws.java

License:Open Source License

private static byte[] digestNJava(byte[] p, int iter) {
    SHA256Digest digest = new SHA256Digest();
    byte[] output = new byte[digest.getDigestSize()];
    byte[] input = new byte[digest.getDigestSize()];
    byte[] t;/*from   w  ww  .  j  a  v a 2 s .  c om*/

    digest.update(p, 0, p.length);
    digest.doFinal(output, 0);

    for (int i = 0; i < iter; ++i) {
        t = input;
        input = output;
        output = t;

        digest.reset();
        digest.update(input, 0, input.length);
        digest.doFinal(output, 0);
    }

    return output;
}

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From source file:org.satochip.satochipclient.CardConnectorTest.java

License:Apache License

public void testCardParseTransaction(byte keynbr) throws CardConnectorException, ECException {

    // recover pubkey
    byte[] pubkey, response;
    CardDataParser.PubKeyData dataparser = new CardDataParser.PubKeyData(authentikey);
    if (keynbr == bip32_keynbr) {
        response = cc.cardBip32GetExtendedKey(default_bip32path);
        authentikey = dataparser.parseBip32GetExtendedKey(response).authentikey;
        pubkey = dataparser.pubkey;//from ww  w . ja  v  a 2 s .  c  om
    } else {
        response = cc.cardGetPublicKeyFromPrivate(keynbr);
        pubkey = dataparser.parseGetPublicKeyFromPrivate(response).pubkey;
    }

    // bitcoinj
    NetworkParameters params;
    params = RegTestParams.get();
    Transaction tx = new Transaction(params);
    ECKey serverKey = new ECKey(null, pubkey, true);
    BigInteger nanoCoins = Utils.toNanoCoins(1, 0);
    TransactionOutput outputToMe = new TransactionOutput(params, tx, nanoCoins, serverKey);

    // simple tx
    tx.addOutput(outputToMe);
    tx.addInput(new TransactionInput(params, tx, outputToMe.getScriptBytes()));

    int inputIndex = 0;
    byte[] connectedScript = outputToMe.getScriptBytes();
    byte sigHashType = (byte) TransactionSignature.calcSigHashValue(SigHash.ALL, false);
    byte[] rawtxforhashing = byteArrayForSignature(tx, inputIndex, connectedScript, sigHashType);

    // unused
    System.out.println("Raw tx for hashing:" + toHexString(rawtxforhashing));
    byte[] rawtxhash = new byte[32];
    SHA256Digest sha256 = new SHA256Digest();
    sha256.reset();
    sha256.update(rawtxforhashing, 0, rawtxforhashing.length);
    sha256.doFinal(rawtxhash, 0);
    //System.out.println("Raw tx singlehash:" + toString(rawtxhash));
    sha256.reset();
    sha256.update(rawtxhash, 0, rawtxhash.length);
    sha256.doFinal(rawtxhash, 0);
    //System.out.println("Raw tx doublehash:" + toString(rawtxhash));

    Sha256Hash rawtxhash2 = tx.hashForSignature(inputIndex, connectedScript, sigHashType);
    byte[] txhash_sw = rawtxhash2.getBytes();
    System.out.println("Tx hash Bitcoinj: " + toHexString(txhash_sw));

    // send to card for parsing
    //byte[] response= cc.cardParseTransaction(rawtxforhashing);
    response = cc.cardParseTx(rawtxforhashing);
    CardDataParser.PubKeyData txparser = new CardDataParser.PubKeyData(authentikey);
    byte[] txhash_hw = txparser.parseTxHash(response).data; //Arrays.copyOfRange(response, 2, 2+32);
    System.out.println("Tx hash SatoChip: " + toHexString(txhash_hw));
    System.out.println(txparser.toString());
    assertArrayEquals(txhash_hw, txhash_sw);

    // check if 2fa is required
    boolean need_2fa_chalresp = ((txparser.option_flags & 0x8000) == 0x8000) ? true : false; // if msb is set, a challenge-response 2nd factor authentification is needed
    byte[] txhmac = null;
    if (need_2fa_chalresp) {
        try {
            System.out.println("Second factor authentication required for challenge response...");
            System.out.println("Please insert a configured yubikey!");
            MILLISECONDS.sleep(2000);
        } catch (InterruptedException ex) {
        }
        YubikeyConnector yubikey = new YubikeyConnector(false);
        yubikey.findYubikey(YubikeyConnector.PRODUCT_ID_NEO);
        yubikey.openYubikey();
        yubikey.attachYubikeyInterface();
        txhmac = yubikey.challenge_response(txhash_hw, YubikeyConnector.MODE_HMAC, YubikeyConnector.SLOT_2,
                false, true);
        yubikey.releaseYubikeyInterface();
        yubikey.closeYubikey();
        System.out.println("txhmac: " + toHexString(txhmac));
        // test with wrong hmac:
        //txhmac[0]=0;
    }
    byte[] txsign = cc.cardSignTransaction(keynbr, txhash_hw, txhmac);
    System.out.println("txsign: " + toHexString(txsign));

}

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From source file:org.ScripterRon.BitcoinCore.ECKey.java

License:Apache License

/**
 * Creates a signature for the supplied contents using the private key
 *
 * @param       contents                Contents to be signed
 * @return                              ECDSA signature
 * @throws      ECException             Unable to create signature
 *///from   w  w  w. j  av a  2 s  .  c o m
public ECDSASignature createSignature(byte[] contents) throws ECException {
    if (privKey == null)
        throw new IllegalStateException("No private key available");
    //
    // Get the double SHA-256 hash of the signed contents
    //
    byte[] contentsHash = Utils.doubleDigest(contents);
    //
    // Create the signature
    //
    BigInteger[] sigs;
    try {
        ECDSASigner signer = new ECDSASigner(new HMacDSAKCalculator(new SHA256Digest()));
        ECPrivateKeyParameters privKeyParams = new ECPrivateKeyParameters(privKey, ecParams);
        signer.init(true, privKeyParams);
        sigs = signer.generateSignature(contentsHash);
    } catch (RuntimeException exc) {
        throw new ECException("Exception while creating signature", exc);
    }
    //
    // Create a canonical signature by adjusting the S component to be less than or equal to
    // half the curve order.
    //
    if (sigs[1].compareTo(HALF_CURVE_ORDER) > 0)
        sigs[1] = ecParams.getN().subtract(sigs[1]);
    return new ECDSASignature(sigs[0], sigs[1]);
}

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From source file:org.sperle.keepass.crypto.bc.SHA256Hash.java

License:Open Source License

public byte[] getHash(byte[][] messages, ProgressMonitor pm) {
    SHA256Digest md = new SHA256Digest();
    if (pm != null)
        pm.nextStep(sumLength(messages) / DWORD_LENGTH, "pm_hash");
    for (int i = 0; i < messages.length; i++) {
        md.update(messages[i], 0, messages[i].length, pm);
        if (pm != null && pm.isCanceled())
            return null;
    }/*from   w ww.  j  ava 2s  . c om*/
    byte[] hash = new byte[md.getDigestSize()];
    md.doFinal(hash, 0);
    return hash;
}

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From source file:org.sperle.keepass.io.j2me.J2meIOManager.java

License:Open Source License

public byte[] generateHash(String filename, int packetSize) throws IOException {
    FileConnection conn = null;/*from w w w . j av a2  s . c  o  m*/
    byte[] hash = null;
    try {
        conn = (FileConnection) Connector.open(filename, Connector.READ);
        InputStream is = conn.openInputStream();
        byte[] buf = new byte[packetSize];
        int read = -1;
        SHA256Digest md = new SHA256Digest();
        while ((read = is.read(buf)) > -1) {
            md.update(buf, 0, read, null);
        }
        hash = new byte[md.getDigestSize()];
        md.doFinal(hash, 0);
    } finally {
        try {
            if (conn != null)
                conn.close();
        } catch (IOException e) {
        }
    }

    return hash;
}

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From source file:org.toporin.bitcoincore.ECKey.java

License:Apache License

public static byte[] recoverFromSignature(int recID, byte[] msg, byte[] sig, boolean doublehash)
        throws ECException {

    //return CardConnector.recoverPublicKeyFromSig(recID, msg, sig, doublehash);

    byte[] digest = new byte[32];
    SHA256Digest sha256 = new SHA256Digest();
    sha256.reset();//from  w  w w.jav  a 2  s.  c o m
    sha256.update(msg, 0, msg.length);
    sha256.doFinal(digest, 0);
    if (doublehash) {
        sha256.reset();
        sha256.update(digest, 0, digest.length);
        sha256.doFinal(digest, 0);
    }
    BigInteger bi = new BigInteger(1, digest);
    ECDSASignature ecdsaSig = new ECDSASignature(sig);
    ECKey k = ECKey.recoverFromSignature(recID, ecdsaSig, bi, true);

    if (k != null)
        return k.getPubKey();
    else
        return null;

}

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From source file:org.tramaci.onionmail.Stdio.java

License:Open Source License

public static byte[] sha256(byte[] a) throws Exception {
    Digest d = new SHA256Digest();
    byte[] r = new byte[d.getDigestSize()];
    d.update(a, 0, a.length);/*from  w  w  w .  j  a  v a2s.  c o  m*/
    d.doFinal(r, 0);
    return r;
}

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From source file:org.tramaci.onionmail.Stdio.java

License:Open Source License

public static byte[] sha256a(byte[][] a) throws Exception {
    Digest d = new SHA256Digest();
    byte[] r = new byte[d.getDigestSize()];
    int cx = a.length;
    for (int ax = 0; ax < cx; ax++)
        d.update(a[ax], 0, a[ax].length);
    d.doFinal(r, 0);// w w  w.ja  v  a2 s. co m
    return r;
}

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From source file:org.xipki.commons.security.HashAlgoType.java

License:Open Source License

public Digest createDigest() {
    switch (this) {
    case SHA1:// w  ww .  ja va 2s  .co m
        return new SHA1Digest();
    case SHA224:
        return new SHA224Digest();
    case SHA256:
        return new SHA256Digest();
    case SHA384:
        return new SHA384Digest();
    case SHA512:
        return new SHA512Digest();
    case SHA3_224:
        return new SHA3Digest(224);
    case SHA3_256:
        return new SHA3Digest(256);
    case SHA3_384:
        return new SHA3Digest(384);
    case SHA3_512:
        return new SHA3Digest(512);
    default:
        throw new RuntimeException("should not reach here, unknown HashAlgoType " + name());
    }
}

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