Examples with Hash net.i2p.data.Hash used on opensource projects

Example 26 with Hash

use of net.i2p.data.Hash in project i2p.i2p by i2p.

the class ElGamalTest method testBasicAES.

public void testBasicAES() {
    SessionKey sessionKey = KeyGenerator.getInstance().generateSessionKey();
    Hash h = SHA256Generator.getInstance().calculateHash(sessionKey.getData());
    byte[] iv = new byte[16];
    System.arraycopy(h.getData(), 0, iv, 0, 16);
    String msg = "Hello world01234012345678901234501234567890123450123456789012345";
    h = SHA256Generator.getInstance().calculateHash(DataHelper.getASCII(msg));
    byte[] aesEncr = new byte[DataHelper.getASCII(msg).length];
    byte[] aesDecr = new byte[aesEncr.length];
    _context.aes().encrypt(DataHelper.getASCII(msg), 0, aesEncr, 0, sessionKey, iv, aesEncr.length);
    _context.aes().decrypt(aesEncr, 0, aesDecr, 0, sessionKey, iv, aesEncr.length);
    h = SHA256Generator.getInstance().calculateHash(aesDecr);
    assertEquals(msg, new String(aesDecr));
}

Example 27 with Hash

use of net.i2p.data.Hash in project i2p.i2p by i2p.

the class GeneralHelper method updateTunnelConfig.

protected static List<String> updateTunnelConfig(TunnelControllerGroup tcg, int tunnel, TunnelConfig config) {
    // Get current tunnel controller
    TunnelController cur = getController(tcg, tunnel);
    Properties props = config.getConfig();
    List<String> msgs = new ArrayList<String>();
    String type = props.getProperty(TunnelController.PROP_TYPE);
    if (TunnelController.TYPE_STD_CLIENT.equals(type) || TunnelController.TYPE_IRC_CLIENT.equals(type)) {
        // 
        if (Boolean.parseBoolean(props.getProperty(OPT + I2PTunnelClientBase.PROP_USE_SSL))) {
            // add the local interface and all targets to the cert
            String intfc = props.getProperty(TunnelController.PROP_INTFC);
            Set<String> altNames = new HashSet<String>(4);
            if (intfc != null && !intfc.equals("0.0.0.0") && !intfc.equals("::") && !intfc.equals("0:0:0:0:0:0:0:0"))
                altNames.add(intfc);
            String tgts = props.getProperty(TunnelController.PROP_DEST);
            if (tgts != null) {
                altNames.add(intfc);
                String[] hosts = DataHelper.split(tgts, "[ ,]");
                for (String h : hosts) {
                    int colon = h.indexOf(':');
                    if (colon >= 0)
                        h = h.substring(0, colon);
                    altNames.add(h);
                    if (!h.endsWith(".b32.i2p")) {
                        Hash hash = ConvertToHash.getHash(h);
                        if (hash != null)
                            altNames.add(hash.toBase32());
                    }
                }
            }
            try {
                boolean created = SSLClientUtil.verifyKeyStore(props, OPT, altNames);
                if (created) {
                    // config now contains new keystore props
                    String name = props.getProperty(TunnelController.PROP_NAME, "");
                    msgs.add("Created new self-signed certificate for tunnel " + name);
                }
            } catch (IOException ioe) {
                msgs.add("Failed to create new self-signed certificate for tunnel " + getTunnelName(tcg, tunnel) + ", check logs: " + ioe);
            }
        }
    }
    if (cur == null) {
        // creating new
        cur = new TunnelController(props, "", true);
        tcg.addController(cur);
        if (cur.getStartOnLoad())
            cur.startTunnelBackground();
    } else {
        cur.setConfig(props, "");
    }
    // if the current tunnel is shared, and of supported type
    if (Boolean.parseBoolean(cur.getSharedClient()) && TunnelController.isClient(cur.getType())) {
        // all clients use the same I2CP session, and as such, use the same I2CP options
        List<TunnelController> controllers = tcg.getControllers();
        for (int i = 0; i < controllers.size(); i++) {
            TunnelController c = controllers.get(i);
            // Current tunnel modified by user, skip
            if (c == cur)
                continue;
            // if it belongs to a shared destination, and is of supported type
            if (Boolean.parseBoolean(c.getSharedClient()) && TunnelController.isClient(c.getType())) {
                Properties cOpt = c.getConfig("");
                config.updateTunnelQuantities(cOpt);
                cOpt.setProperty("option.inbound.nickname", TunnelConfig.SHARED_CLIENT_NICKNAME);
                cOpt.setProperty("option.outbound.nickname", TunnelConfig.SHARED_CLIENT_NICKNAME);
                c.setConfig(cOpt, "");
            }
        }
    }
    return msgs;
}

Example 28 with Hash

use of net.i2p.data.Hash in project i2p.i2p by i2p.

the class IdenticonServlet method doGet.

@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    if (request.getCharacterEncoding() == null)
        request.setCharacterEncoding("UTF-8");
    String codeParam = request.getParameter(PARAM_IDENTICON_CODE_SHORT);
    boolean codeSpecified = codeParam != null && codeParam.length() > 0;
    if (!codeSpecified) {
        response.setStatus(403);
        return;
    }
    String sizeParam = request.getParameter(PARAM_IDENTICON_SIZE_SHORT);
    int size = 32;
    if (sizeParam != null) {
        try {
            size = Integer.parseInt(sizeParam);
            if (size < 16)
                size = 16;
            else if (size > 512)
                size = 512;
        } catch (NumberFormatException nfe) {
        }
    }
    String identiconETag = IdenticonUtil.getIdenticonETag(codeParam.hashCode(), size, version);
    String requestETag = request.getHeader("If-None-Match");
    if (requestETag != null && requestETag.equals(identiconETag)) {
        response.setStatus(HttpServletResponse.SC_NOT_MODIFIED);
    } else {
        // we try to interpret the codeParam parameter as:
        // 1) a number
        // 2) a base32 or base64 hash, which we take the Java hashcode of
        // 3) a string, which we take the Java hashcode of
        int code;
        try {
            code = Integer.parseInt(codeParam);
        } catch (NumberFormatException nfe) {
            Hash h = ConvertToHash.getHash(codeParam);
            if (h != null)
                code = Arrays.hashCode(h.getData());
            else
                code = codeParam.hashCode();
        }
        byte[] imageBytes = null;
        // retrieve image bytes from either cache or renderer
        if (cache == null || (imageBytes = cache.get(identiconETag)) == null) {
            ByteArrayOutputStream byteOut = new ByteArrayOutputStream();
            RenderedImage image = renderer.render(code, size);
            ImageIO.write(image, IDENTICON_IMAGE_FORMAT, byteOut);
            imageBytes = byteOut.toByteArray();
            if (cache != null)
                cache.add(identiconETag, imageBytes);
        } else {
            response.setStatus(403);
            return;
        }
        // set ETag and, if code was provided, Expires header
        response.setHeader("ETag", identiconETag);
        if (codeSpecified) {
            long expires = System.currentTimeMillis() + identiconExpiresInMillis;
            response.addDateHeader("Expires", expires);
        }
        // return image bytes to requester
        response.setContentType(IDENTICON_IMAGE_MIMETYPE);
        response.setHeader("X-Content-Type-Options", "nosniff");
        response.setHeader("Accept-Ranges", "none");
        response.setContentLength(imageBytes.length);
        response.getOutputStream().write(imageBytes);
    }
}

Example 29 with Hash

use of net.i2p.data.Hash in project i2p.i2p by i2p.

the class RandomArtServlet method doGet.

@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    if (request.getCharacterEncoding() == null)
        request.setCharacterEncoding("UTF-8");
    String codeParam = request.getParameter(PARAM_IDENTICON_CODE_SHORT);
    boolean codeSpecified = codeParam != null && codeParam.length() > 0;
    if (!codeSpecified) {
        response.setStatus(403);
        return;
    }
    String modeParam = request.getParameter(PARAM_IDENTICON_MODE_SHORT);
    boolean html = modeParam == null || modeParam.startsWith("h");
    String identiconETag = IdenticonUtil.getIdenticonETag(codeParam.hashCode(), 0, version);
    String requestETag = request.getHeader("If-None-Match");
    if (requestETag != null && requestETag.equals(identiconETag)) {
        response.setStatus(HttpServletResponse.SC_NOT_MODIFIED);
    } else {
        Hash h = ConvertToHash.getHash(codeParam);
        if (h == null) {
            response.setStatus(403);
        } else {
            StringBuilder buf = new StringBuilder(512);
            if (html) {
                response.setContentType("text/html");
                buf.append("<html><head><meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\"></head><body>");
            } else {
                response.setContentType("text/plain");
                response.setCharacterEncoding("UTF-8");
            }
            response.setHeader("X-Content-Type-Options", "nosniff");
            response.setHeader("Accept-Ranges", "none");
            buf.append(RandomArt.gnutls_key_fingerprint_randomart(h.getData(), "SHA", 256, "", true, html));
            if (html)
                buf.append("</body></html>");
            // set ETag and, if code was provided, Expires header
            response.setHeader("ETag", identiconETag);
            if (codeSpecified) {
                long expires = System.currentTimeMillis() + identiconExpiresInMillis;
                response.addDateHeader("Expires", expires);
            }
            // return image bytes to requester
            byte[] imageBytes = buf.toString().getBytes("UTF-8");
            response.setContentLength(imageBytes.length);
            response.getOutputStream().write(imageBytes);
        }
    }
}

Example 30 with Hash

use of net.i2p.data.Hash in project i2p.i2p by i2p.

the class ConvertToHash method main.

/**
 * @since 0.9.28
 */
public static void main(String[] args) {
    if (args.length == 0) {
        System.err.println("Usage: converttohash [hostname|b32|destination]...");
        return;
    }
    for (int i = 0; i < args.length; i++) {
        Hash h = getHash(args[i]);
        System.out.println(h != null ? h.toBase64() : "conversion failed");
    }
}