Example usage for java.security MessageDigest update

Introduction

In this page you can find the example usage for java.security MessageDigest update.

Prototype

public void update(byte[] input, int offset, int len) 

Source Link

Document

Updates the digest using the specified array of bytes, starting at the specified offset.

Usage

From source file:com.easyway.java.rpc.secure.security.Encodes.java

public static String operationAlgorithm(String secureData)
        throws NoSuchAlgorithmException, UnsupportedEncodingException {
    MessageDigest md = MessageDigest.getInstance("SHA-1");

    md.update(secureData.getBytes("utf-8"), 0, secureData.length());
    byte[] sha1hash = md.digest();
    return convertToHex(sha1hash);
}

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From source file:fm.audiobox.core.utils.MD5Checksum.java

/**
 * Calculate checksum of a File using MD5 algorithm
 *//*from ww w .  j  a v  a  2  s.c o m*/
public static String checkSum(InputStream is) throws NoSuchAlgorithmException {
    String checksum = null;
    try {
        MessageDigest md = MessageDigest.getInstance("MD5");
        md.reset();

        // Using MessageDigest update() method to provide input
        byte[] buffer = new byte[8192];
        int numOfBytesRead;
        while ((numOfBytesRead = is.read(buffer)) > 0) {
            md.update(buffer, 0, numOfBytesRead);
        }
        byte[] hash = md.digest();
        checksum = new String(Hex.encodeHex(hash));
    } catch (IOException ex) {
        logger.error(ex.getMessage());
    }

    return checksum;
}

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From source file:core.SHA256Hash.java

public static String CalculateCheckSum(String FileName, String url) throws Exception {
    MessageDigest md = MessageDigest.getInstance(getHashAlgType(url));
    FileInputStream fis = new FileInputStream(FileName);

    byte[] dataBytes = new byte[1024];

    int nread = 0;
    while ((nread = fis.read(dataBytes)) != -1) {
        md.update(dataBytes, 0, nread);
    }// w w  w . j  a  v  a 2  s  . co m
    ;
    byte[] mdbytes = md.digest();

    // Store byte array as string and return it
    String value = new String(mdbytes);
    System.out.println("Encoded " + getHashAlgType(url) + " hash: " + value);

    return value;
}

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From source file:net.sf.keystore_explorer.crypto.digest.DigestUtil.java

/**
 * Get a digest of the input stream./*w w  w  .  j av a  2s.c  om*/
 *
 * @param istream
 *            Input stream to digest
 * @param digestType
 *            The message digest algorithm
 * @return The message digest
 * @throws CryptoException
 *             If message digester could not be created
 */
public static byte[] getMessageDigest(InputStream istream, DigestType digestType) throws CryptoException {
    MessageDigest messageDigester = getMessageDigester(digestType);

    try {
        byte[] buffer = new byte[2048];
        int read = 0;

        while ((read = istream.read(buffer)) != -1) {
            messageDigester.update(buffer, 0, read);
        }

        byte[] messageDigest = messageDigester.digest();

        return messageDigest;
    } catch (IOException ex) {
        throw new CryptoException(res.getString("NoCreateDigest.exception.message"), ex);
    } finally {
        IOUtils.closeQuietly(istream);
    }
}

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From source file:core.SHA256Hash.java

public static String CalculateCheckSumBase64(String FileName, String url) throws Exception {
    MessageDigest md = MessageDigest.getInstance(SHA256);
    FileInputStream fileHandle = new FileInputStream(FileName);

    byte[] dataBytes = new byte[1024];

    int nread = 0;
    while ((nread = fileHandle.read(dataBytes)) != -1) {
        md.update(dataBytes, 0, nread);
    }/* ww w.ja v a  2  s.c  om*/
    ;
    byte[] mdbytes = md.digest();

    byte[] bytes = null;
    if (SHA256 == getHashAlgType(url)) {
        // Do base64 encoding
        bytes = Base64.encodeBase64URLSafe(mdbytes);
    } else {
        if (SHA256_16 == getHashAlgType(url))
            bytes = Base64.encodeBase64(new byte[] { mdbytes[0], mdbytes[1] }, false, true, 4);
    }

    // Store byte array as string and return it
    String value = new String(bytes);
    System.out.println("Base64 encoded " + getHashAlgType(url) + " hash: " + value);

    return value;
}

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From source file:edu.smc.mediacommons.modules.Md5Module.java

public static String getSHA1(final File file) {
    String sha1 = null;//from  w  w w.j ava  2 s  .com

    try {
        final MessageDigest messageDigest = MessageDigest.getInstance("SHA1");

        InputStream is = new BufferedInputStream(new FileInputStream(file));
        final byte[] buffer = new byte[1024];
        for (int read = 0; (read = is.read(buffer)) != -1;) {
            messageDigest.update(buffer, 0, read);
        }

        // Convert the byte to hex format
        Formatter formatter = new Formatter();
        for (final byte b : messageDigest.digest()) {
            formatter.format("%02x", b);
        }

        sha1 = formatter.toString();
        formatter.close();
        is.close();
    } catch (IOException | NoSuchAlgorithmException e) {
        e.printStackTrace();
    } finally {

    }

    return sha1;
}

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From source file:org.wso2.carbon.apimgt.gateway.handlers.analytics.APIMgtGoogleAnalyticsTrackingHandler.java

/**
 * /*from w  ww .ja va 2  s. co m*/
 * Generate a visitor id for this hit. If there is a visitor id in the
 * messageContext, use that. Otherwise use a random number.
 * 
 */
private static String getVisitorId(String account, String userAgent, MessageContext msgCtx)
        throws NoSuchAlgorithmException, UnsupportedEncodingException {

    if (msgCtx.getProperty(COOKIE_NAME) != null) {
        return (String) msgCtx.getProperty(COOKIE_NAME);
    }
    String message;

    AuthenticationContext authContext = APISecurityUtils.getAuthenticationContext(msgCtx);
    if (authContext != null) {
        message = authContext.getApiKey();
    } else {
        message = ANONYMOUS_USER_ID;
    }

    MessageDigest m = MessageDigest.getInstance("MD5");
    m.update(message.getBytes("UTF-8"), 0, message.length());
    byte[] sum = m.digest();
    BigInteger messageAsNumber = new BigInteger(1, sum);
    String md5String = messageAsNumber.toString(16);

    /* Pad to make sure id is 32 characters long. */
    while (md5String.length() < 32) {
        md5String = "0" + md5String;
    }

    return "0x" + md5String.substring(0, 16);
}

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From source file:com.exam.mserver.common.persistence.util.Digests.java

private static byte[] digest(InputStream input, String algorithm) throws IOException {
    try {/*from   ww w  .  j a  v  a  2 s  .co  m*/
        MessageDigest messageDigest = MessageDigest.getInstance(algorithm);
        int bufferLength = 8 * 1024;
        byte[] buffer = new byte[bufferLength];
        int read = input.read(buffer, 0, bufferLength);

        while (read > -1) {
            messageDigest.update(buffer, 0, read);
            read = input.read(buffer, 0, bufferLength);
        }

        return messageDigest.digest();
    } catch (GeneralSecurityException e) {
        throw new RuntimeException(e);
    }
}

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From source file:com.idea.quickstart.common.security.Digests.java

private static byte[] digest(InputStream input, String algorithm) throws IOException {
    try {//from  w w  w  . j  a va  2 s.  c o m
        MessageDigest messageDigest = MessageDigest.getInstance(algorithm);
        int bufferLength = 8 * 1024;
        byte[] buffer = new byte[bufferLength];
        int read = input.read(buffer, 0, bufferLength);

        while (read > -1) {
            messageDigest.update(buffer, 0, read);
            read = input.read(buffer, 0, bufferLength);
        }

        return messageDigest.digest();
    } catch (GeneralSecurityException e) {
    }
    return null;
}

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From source file:com.pfw.popsicle.common.Digests.java

private static byte[] digest(InputStream input, String algorithm) throws IOException {
    try {/*w  ww  . j a va  2s  . c  o  m*/
        MessageDigest messageDigest = MessageDigest.getInstance(algorithm);
        int bufferLength = 8 * 1024;
        byte[] buffer = new byte[bufferLength];
        int read = input.read(buffer, 0, bufferLength);

        while (read > -1) {
            messageDigest.update(buffer, 0, read);
            read = input.read(buffer, 0, bufferLength);
        }

        return messageDigest.digest();
    } catch (GeneralSecurityException e) {
        throw new IOException(e.getMessage());
    }
}

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