Example usage for java.math BigInteger BigInteger

Introduction

In this page you can find the example usage for java.math BigInteger BigInteger.

Prototype

private BigInteger(byte[] magnitude, int signum)

Source Link

Document

This private constructor is for internal use and assumes that its arguments are correct.

Usage

From source file:baldrickv.s3streamingtool.Hash.java

public static String hash(String algo, int output_bits, byte b[], int offset, int size) {
    try {//from   w w w  . java2 s  .  c o m
        int output_bytes = output_bits / 4; //hex = 4 bits per byte
        MessageDigest sig = MessageDigest.getInstance(algo);
        sig.update(b, offset, size);
        byte d[] = sig.digest();

        StringBuffer s = new StringBuffer(output_bytes);
        BigInteger bi = new BigInteger(1, d);
        s.append(bi.toString(16));
        while (s.length() < output_bytes) {
            s.insert(0, '0');
        }
        return s.toString();
    } catch (Exception e) {
        e.printStackTrace();
        System.exit(-1);
        return null;
    }

}

From source file:Main.java

/**
 * Convert an array of bytes to a non-negative big integer.
 *//*from   w  ww .  j  a  v a2s . c om*/
public static BigInteger ByteArrayToBigIntegerWithoutSign(byte[] array) {
    return new BigInteger(1, array);
}

From source file:de.csdev.ebus.command.datatypes.std.AbstractEBusTypeUnsignedNumber.java

@Override
public BigDecimal decodeInt(byte[] data) throws EBusTypeException {

    byte[] clone = ArrayUtils.clone(data);
    ArrayUtils.reverse(clone);//from  ww  w  . ja v a 2s  . c o m

    return new BigDecimal(new BigInteger(1, clone));
}

From source file:com.algodefu.yeti.md5.MD5HashGenerator.java

public static String generateKeyByString(String string) {
    MessageDigest m = null;/*from  w w  w.ja  v  a  2s  .  c  om*/
    try {
        m = MessageDigest.getInstance("MD5");
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    }
    m.reset();
    m.update(string.getBytes());
    byte[] digest = m.digest();
    BigInteger bigInt = new BigInteger(1, digest);
    String hashtext = bigInt.toString(16);
    while (hashtext.length() < 32) {
        hashtext = "0" + hashtext;
    }
    return hashtext;
}

From source file:de.upb.wdqa.wdvd.revisiontags.SHA1Converter.java

private static byte[] parseByte(int base, String sha1) {
    byte[] result = null;
    if (sha1 != null) {
        if (!sha1.equals("")) {
            try {
                BigInteger bi = new BigInteger(sha1, base);
                result = bi.toByteArray();

            } catch (Exception e) {
                logger.error("", e);
            }//from   www .j  a  v a2  s .c  om
        } else {
            result = new byte[0];
        }
    }
    return result;

}

From source file:org.rivetlogic.utils.IntegrationUtils.java

public static BigInteger MD5BigInteger(String str) throws NoSuchAlgorithmException {
    MessageDigest digest = MessageDigest.getInstance("MD5");

    byte[] dg = digest.digest(str.getBytes());

    BigInteger number = new BigInteger(1, dg);

    return number;
}

From source file:Pusher.java

/**
 * Converts a byte array to a string representation
 * @param data// ww  w  .  ja  v a  2 s .c  o  m
 * @return
 */
private static String byteArrayToString(byte[] data) {
    BigInteger bigInteger = new BigInteger(1, data);
    String hash = bigInteger.toString(16);
    // Zero pad it
    while (hash.length() < 32) {
        hash = "0" + hash;
    }
    return hash;
}

From source file:com.sugaronrest.restapicalls.methodcalls.Authentication.java

/**
 * Login to SugarCRM via REST API call./*from  w w  w .j a  va 2 s.c o m*/
 *
 *  @param loginRequest LoginRequest object.
 *  @return LoginResponse object.
 */
public static LoginResponse login(LoginRequest loginRequest) throws Exception {

    LoginResponse loginResponse = new LoginResponse();

    try {
        MessageDigest md5 = MessageDigest.getInstance("MD5");
        String passwordHash = new BigInteger(1, md5.digest(loginRequest.password.getBytes())).toString(16);

        Map<String, String> userCredentials = new LinkedHashMap<String, String>();
        userCredentials.put("user_name", loginRequest.username);
        userCredentials.put("password", passwordHash);

        Map<String, Object> auth = new LinkedHashMap<String, Object>();
        auth.put("user_auth", userCredentials);
        auth.put("application_name", "RestClient");

        ObjectMapper mapper = new ObjectMapper();
        String jsonAuthData = mapper.writeValueAsString(auth);

        Map<String, Object> request = new LinkedHashMap<String, Object>();
        request.put("method", "login");
        request.put("input_type", "json");
        request.put("response_type", "json");
        request.put("rest_data", auth);

        String jsonRequest = mapper.writeValueAsString(request);

        request.put("rest_data", jsonAuthData);

        HttpResponse response = Unirest.post(loginRequest.url).fields(request).asString();

        String jsonResponse = response.getBody().toString();
        loginResponse.setJsonRawRequest(jsonRequest);
        loginResponse.setJsonRawResponse(jsonResponse);

        Map<String, Object> responseObject = mapper.readValue(jsonResponse, Map.class);
        if (responseObject.containsKey("id")) {
            loginResponse.sessionId = (responseObject.get("id").toString());
            loginResponse.setStatusCode(response.getStatus());
            loginResponse.setError(null);
        } else {
            ErrorResponse errorResponse = mapper.readValue(jsonResponse, ErrorResponse.class);
            errorResponse.setStatusCode(HttpStatus.SC_BAD_REQUEST);
            loginResponse.setStatusCode(HttpStatus.SC_BAD_REQUEST);
            loginResponse.setError(errorResponse);
        }
    } catch (Exception exception) {
        ErrorResponse errorResponse = ErrorResponse.format(exception, exception.getMessage());
        loginResponse.setError(errorResponse);
    }

    return loginResponse;
}

From source file:Main.java

public static String getMd5Hash(File file) {
    try {// w ww.  java2 s .co m
        // CTS (6/15/2010) : stream file through digest instead of handing it the byte[]
        MessageDigest md = MessageDigest.getInstance("MD5");
        int chunkSize = 256;

        byte[] chunk = new byte[chunkSize];

        // Get the size of the file
        long lLength = file.length();

        if (lLength > Integer.MAX_VALUE) {
            Log.e(t, "File " + file.getName() + "is too large");
            return null;
        }

        int length = (int) lLength;

        InputStream is = null;
        is = new FileInputStream(file);

        int l = 0;
        for (l = 0; l + chunkSize < length; l += chunkSize) {
            is.read(chunk, 0, chunkSize);
            md.update(chunk, 0, chunkSize);
        }

        int remaining = length - l;
        if (remaining > 0) {
            is.read(chunk, 0, remaining);
            md.update(chunk, 0, remaining);
        }
        byte[] messageDigest = md.digest();

        BigInteger number = new BigInteger(1, messageDigest);
        String md5 = number.toString(16);
        while (md5.length() < 32)
            md5 = "0" + md5;
        is.close();
        return md5;

    } catch (NoSuchAlgorithmException e) {
        Log.e("MD5", e.getMessage());
        return null;

    } catch (FileNotFoundException e) {
        Log.e("No Cache File", e.getMessage());
        return null;
    } catch (IOException e) {
        Log.e("Problem reading from file", e.getMessage());
        return null;
    }

}

From source file:com.assemblade.server.model.AccessToken.java

public static AccessToken createAccessToken(User user) {
    AccessToken token = new AccessToken();
    token.uid = user.getUserId();/*  w w  w  .  j ava  2  s . c  om*/
    token.token = Base64.encode(SequenceNumberGenerator.getNextSequenceNumber().getBytes());
    token.secret = new BigInteger(130, secureRandom).toString();
    return token;
}