Package javax.crypto

Examples of javax.crypto.Cipher.update()

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            if (serializedData != null) {
                int numBytes;
                byte[] buf = new byte[8192];
                ByteArrayOutputStream baos = new ByteArrayOutputStream();
                while ((numBytes = serializedData.read(buf)) != -1) {
                    byte[] data = c.update(buf, 0, numBytes);
                    baos.write(data);
                }
                baos.write(c.doFinal());
                encryptedBytes = baos.toByteArray();
            } else {
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    // DEKRIPCIJA
        byte[] plainText = new byte[cipher.getOutputSize(encryptedPrivateKey.length)];

        int ptLength = 0;
    try {
      ptLength = cipher.update(encryptedPrivateKey, 0, encryptedPrivateKey.length, plainText, 0);
    } catch (ShortBufferException e) {
      e.printStackTrace();
    }
       
        try {
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        {
            byte[]    bi = keyD[0].toByteArray();

            if (bi[0] == 0)
            {
                c1.update(bi, 1, bi.length - 1);
            }
            else
            {
                c1.update(bi);
            }
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            {
                c1.update(bi, 1, bi.length - 1);
            }
            else
            {
                c1.update(bi);
            }
        }
        else
        {
            ElGamalKey k = (ElGamalKey)privKey.getKey();
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            byte[]        tmp = new byte[size];

            byte[]        bi = keyD[0].toByteArray();
            if (bi.length > size)
            {
                c1.update(bi, 1, bi.length - 1);
            }
            else
            {
                System.arraycopy(bi, 0, tmp, tmp.length - bi.length, bi.length);
                c1.update(tmp);
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                c1.update(bi, 1, bi.length - 1);
            }
            else
            {
                System.arraycopy(bi, 0, tmp, tmp.length - bi.length, bi.length);
                c1.update(tmp);
            }

            bi = keyD[1].toByteArray();
            for (int i = 0; i != tmp.length; i++)
            {
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                tmp[i] = 0;
            }

            if (bi.length > size)
            {
                c1.update(bi, 1, bi.length - 1);
            }
            else
            {
                System.arraycopy(bi, 0, tmp, tmp.length - bi.length, bi.length);
                c1.update(tmp);
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                c1.update(bi, 1, bi.length - 1);
            }
            else
            {
                System.arraycopy(bi, 0, tmp, tmp.length - bi.length, bi.length);
                c1.update(tmp);
            }
        }

        byte[] plain;
        try
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            {
                return new SimpleTestResult(false, getName() + ": Failed " + cipherName + " - first two arrays not equal");
            }
           
            // 3rd try
            byte[]  enc1 = cipher.update(lCode.getBytes());
            byte[]  enc2 = cipher.doFinal();

            if ((enc1.length + enc2.length) != encrypted.length)
            {
                return new SimpleTestResult(false, getName() + ": Failed " + cipherName + " - expected length " + encrypted.length + " got " + (enc1.length + enc2.length));
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            if (!equalArray(encrypted, enc1.length, enc2, enc2.length))
            {
                return new SimpleTestResult(false, getName() + ": Failed " + cipherName + " - enc1 array not equal");
            }
           
            enc1 = cipher.update(lCode.getBytes());
           
            if (!equalArray(encrypted, 0, enc1, enc1.length))
            {
                return new SimpleTestResult(false, getName() + ": Failed " + cipherName + " - 2nd enc1 array not equal");
            }
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