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:com.completetrsst.crypto.Crypto.java

License:Apache License

private static byte[] _cryptIES(byte[] input, Key recipient, boolean forEncryption)
        throws InvalidKeyException, IllegalBlockSizeException, BadPaddingException {
    IESCipher cipher = new IESCipher(new IESEngine(new ECDHBasicAgreement(),
            new KDF2BytesGenerator(new SHA1Digest()), new HMac(new SHA256Digest()),
            new PaddedBufferedBlockCipher(new CBCBlockCipher(new AESEngine()))));

    cipher.engineInit(forEncryption ? Cipher.ENCRYPT_MODE : Cipher.DECRYPT_MODE, recipient, new SecureRandom());
    return cipher.engineDoFinal(input, 0, input.length);
}

From source file:com.DSC.crypto.Cipher.java

License:Open Source License

/**
 * /*ww w .  j av  a 2s.com*/
 * @param priKey
 * @param pubKey
 * @param passphrase
 * @param data
 * @return
 * @throws InvalidCipherTextException
 */
public static byte[] encryptKey(CipherParameters priKey, CipherParameters pubKey, String passphrase,
        byte[] data) throws InvalidCipherTextException {
    /* Initialize IESEngine in stream mode */
    IESEngine engine = new IESEngine(new ECDHCBasicAgreement(), new KDF2BytesGenerator(new SHA256Digest()),
            new HMac(new SHA256Digest()));

    /* Set the IESEngine cipher parameters as the passphrase and passphrase reversed */
    IESParameters param = new IESParameters(passphrase.getBytes(),
            new StringBuilder(passphrase).reverse().toString().getBytes(), engine.getMac().getMacSize() * 8);

    /* Initialize the engine and encrypt the key */
    engine.init(true, priKey, pubKey, param);
    return engine.processBlock(data, 0, data.length);
}

From source file:com.DSC.crypto.Cipher.java

License:Open Source License

/**
 * //from   w  w w . j  a  v a  2s .c  o m
 * @param priKey
 * @param pubKey
 * @param passphrase
 * @param data
 * @return
 * @throws InvalidCipherTextException
 */
public static byte[] decryptKey(CipherParameters priKey, CipherParameters pubKey, String passphrase,
        byte[] data) throws InvalidCipherTextException {
    /* IESEngine in stream mode */
    IESEngine engine = new IESEngine(new ECDHCBasicAgreement(), new KDF2BytesGenerator(new SHA256Digest()),
            new HMac(new SHA256Digest()));

    /* Set the IESEngine cipher parameters as the passphrase and passphrase reversed */
    IESParameters param = new IESParameters(passphrase.getBytes(),
            new StringBuilder(passphrase).reverse().toString().getBytes(), engine.getMac().getMacSize() * 8);

    /* Initialize the engine and decrypt the key */
    engine.init(false, priKey, pubKey, param);
    return engine.processBlock(data, 0, data.length);
}

From source file:com.DSC.crypto.ECDSA.java

License:Open Source License

/**
 * /*from ww w  .j  a  va  2  s . c om*/
 * @param data
 * @return
 */
private static byte[] hash(byte[] data) {
    Digest digest = new SHA256Digest();
    byte[] hash = new byte[digest.getDigestSize()];

    digest.update(data, 0, data.length);
    digest.doFinal(hash, 0);
    digest.reset();

    return hash;
}

From source file:com.facebook.delegatedrecovery.CountersignedRecoveryToken.java

License:Open Source License

/**
 * Utility method to quickly get a hex-encoded SHA256 digest of the data field
 * of the countersigned token, which contains the original token.
 * /*from   w w  w . ja  v  a 2  s .  co m*/
 * @return hex encoded string of SHA256 digest
 */
public String getInnerTokenHash() {
    final SHA256Digest digest = new SHA256Digest();
    final byte[] hash = new byte[digest.getByteLength()];
    digest.update(data, 0, data.length);
    digest.doFinal(hash, 0);
    return DelegatedRecoveryUtils.encodeHex(hash);
}

From source file:com.facebook.delegatedrecovery.DelegatedRecoveryUtils.java

License:Open Source License

/**
 * Simple utility method to return a hex-encoded string of the SHA256 digest
 * of a byte[]/*from w  ww.  j  a va 2  s .  com*/
 * 
 * @param bytes The bytes to encode
 * @return The hex encoded bytes in a String
 */
public static String sha256(final byte[] bytes) {
    // hash of the token to re-identify it later
    final SHA256Digest digest = new SHA256Digest();
    final byte[] hash = new byte[digest.getByteLength()];
    digest.update(bytes, 0, bytes.length);
    digest.doFinal(hash, 0);
    return DelegatedRecoveryUtils.encodeHex(hash);
}

From source file:com.facebook.delegatedrecovery.RecoveryToken.java

License:Open Source License

private byte[] getSignature(final byte[] rawArray, final ECPrivateKey privateKey) throws IOException {
    if (this.signature != null) {
        throw new IllegalStateException("This token already has a signature.");
    }//  w w w .  j  a va  2 s.  c  om
    final BigInteger privatePoint = privateKey.getS();

    final SHA256Digest digest = new SHA256Digest();
    final byte[] hash = new byte[digest.getByteLength()];
    digest.update(rawArray, 0, rawArray.length);
    digest.doFinal(hash, 0);

    final ECDSASigner signer = new ECDSASigner(new HMacDSAKCalculator(new SHA256Digest()));
    signer.init(true, new ECPrivateKeyParameters(privatePoint, DelegatedRecoveryUtils.P256_DOMAIN_PARAMS));
    final BigInteger[] signature = signer.generateSignature(hash);
    final ByteArrayOutputStream s = new ByteArrayOutputStream();
    final DERSequenceGenerator seq = new DERSequenceGenerator(s);
    seq.addObject(new ASN1Integer(signature[0]));
    seq.addObject(new ASN1Integer(signature[1]));
    seq.close();

    return s.toByteArray();
}

From source file:com.github.horrorho.inflatabledonkey.chunk.engine.ChunkChecksums.java

License:Open Source License

public static byte[] hashType1(byte[] data) {
    Digest digest = new SHA256Digest();
    byte[] hash = new byte[digest.getDigestSize()];

    digest.reset();//from  w  w w.  ja  v a 2 s  .  c o m
    digest.update(data, 0, data.length);
    digest.doFinal(hash, 0);
    digest.update(hash, 0, hash.length);
    digest.doFinal(hash, 0);

    byte[] checksum = Arrays.copyOf(hash, 20);
    logger.debug("-- hashType1() - hash: 0x{}", Hex.toHexString(checksum));

    return checksum;
}

From source file:com.github.horrorho.inflatabledonkey.chunk.store.ChunkDigest.java

License:Open Source License

public ChunkDigest() {
    this.digest = new SHA256Digest();
}

From source file:com.github.horrorho.inflatabledonkey.cloud.escrow.EscrowOperationsRecover.java

License:Open Source License

static NSDictionary decrypt(BlobA6 blob, byte[] key) {
    logger.debug("-- decrypt() - response blob: {}", blob);

    byte[] pcsData = AESCBC.decryptAESCBC(key, blob.iv(), blob.data());
    logger.debug("-- decrypt() - pcs data: 0x{}", Hex.toHexString(pcsData));

    BlobA0 pcsBlob = new BlobA0(ByteBuffer.wrap(pcsData));
    logger.debug("-- decrypt() - pcs blob: {}", pcsBlob);

    byte[] derivedKey = PBKDF2.generate(new SHA256Digest(), pcsBlob.dsid(), pcsBlob.salt(),
            pcsBlob.iterations(), 16 * 8);
    logger.debug("-- decrypt() - derived key: 0x{}", Hex.toHexString(derivedKey));

    byte[] saltIV = Arrays.copyOf(pcsBlob.salt(), 0x10);
    logger.debug("-- decrypt() - salt/ iv: 0x{}", Hex.toHexString(saltIV));

    byte[] dictionaryData = AESCBC.decryptAESCBC(derivedKey, saltIV, pcsBlob.data());
    logger.debug("-- decrypt() - dictionary data: 0x{}", Hex.toHexString(dictionaryData));

    NSDictionary dictionary = PListsLegacy.parseDictionary(dictionaryData);
    logger.debug("-- decrypt() - dictionary: {}", dictionary.toXMLPropertyList());
    return dictionary;
}