Package javax.crypto

Examples of javax.crypto.Cipher.update()

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

            byte[] bi = secKeyData[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 = secKeyData[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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      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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            // Encrypt and write
            Cipher des = getInitializedDes(true, getDesEncryptionKey(keybytes),
                ZERO_IV);
            try {
                // debug(getHexBytes(confounder, confounder.length));
                pos += des.update(confounder, 0, confounder.length,
                                  ciphertext, pos);
                // debug(" " + getHexBytes(dataBytes, dataOffset, dataLen));
                pos += des.update(plaintext, pStart, pLen,
                                  ciphertext, pos);
                // debug(" " + getHexBytes(padding, padding.length));
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            try {
                // debug(getHexBytes(confounder, confounder.length));
                pos += des.update(confounder, 0, confounder.length,
                                  ciphertext, pos);
                // debug(" " + getHexBytes(dataBytes, dataOffset, dataLen));
                pos += des.update(plaintext, pStart, pLen,
                                  ciphertext, pos);
                // debug(" " + getHexBytes(padding, padding.length));
                des.update(padding, 0, padding.length,
                           ciphertext, pos);
                des.doFinal();
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                                  ciphertext, pos);
                // debug(" " + getHexBytes(dataBytes, dataOffset, dataLen));
                pos += des.update(plaintext, pStart, pLen,
                                  ciphertext, pos);
                // debug(" " + getHexBytes(padding, padding.length));
                des.update(padding, 0, padding.length,
                           ciphertext, pos);
                des.doFinal();
            } catch (GeneralSecurityException e) {
                GSSException ge = new GSSException(GSSException.FAILURE, -1,
                    "Could not use DES Cipher - " + e.getMessage());
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            byte[] temp = new byte[Math.max(blockSize,
                (header == null? blockSize : header.length))];

            if (header != null) {
                // header will be null when doing DES-MD5 Checksum
                des.update(header, 0, header.length, temp, 0);
            }

            // Iterate over all but the last block
            for (int i = 0; i < numBlocks; i++) {
                des.update(data, offset, blockSize,
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