Example usage for java.security MessageDigest reset

Introduction

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

Prototype

public void reset() 

Source Link

Document

Resets the digest for further use.

Usage

From source file:com.cubeia.game.poker.bot.PokerBot.java

private String getPassword() {
    String password = String.valueOf(getBot().getId());
    if (hashPasswd) {
        try {//  ww w . j  a  v  a2s. c  o m
            MessageDigest md = MessageDigest.getInstance("MD5");
            md.reset();
            md.update(password.getBytes("ISO-8859-1"));
            byte[] bytes = md.digest();
            return Hex.encodeHexString(bytes);
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    } else {
        return password;
    }
}

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From source file:edu.cmu.sei.ams.cloudlet.impl.AESEncrypter.java

public AESEncrypter(String password) {
    this.password = password;
    try {/*from   ww w .j a v  a2s .c  o  m*/
        MessageDigest digest = MessageDigest.getInstance("SHA-256");
        digest.reset();
        this.skeySpec = new SecretKeySpec(digest.digest(this.password.getBytes("UTF-8")), "AES");
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
    }
}

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From source file:cz.cas.lib.proarc.common.export.mets.MetsUtils.java

/**
 *
 * Generates an MD5 checksum OutputStream
 *
 * @param is/*from  ww w  .ja v  a 2 s  .  c om*/
 * @param os
 * @return
 * @throws NoSuchAlgorithmException
 * @throws IOException
 */
public static FileMD5Info getDigest(InputStream is) throws NoSuchAlgorithmException, IOException {
    MessageDigest md = MessageDigest.getInstance("MD5");
    md.reset();
    byte[] bytes = new byte[2048];
    int numBytes;
    long totalBytes = 0;
    while ((numBytes = is.read(bytes)) > 0) {
        totalBytes += numBytes;
        md.update(bytes, 0, numBytes);
    }
    byte[] digest = md.digest();
    String result = new String(Hex.encodeHex(digest));
    return new FileMD5Info(result, totalBytes);
}

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From source file:org.phoenicis.tools.checksum.ChecksumCalculator.java

private byte[] getDigest(InputStream inputStream, MessageDigest messageDigest, long sizeInBytes,
        Consumer<ProgressEntity> onChange) throws IOException {

    messageDigest.reset();
    byte[] bytes = new byte[BLOCK_SIZE];
    int numBytes;
    int readBytes = 0;
    while ((numBytes = inputStream.read(bytes)) != -1) {
        messageDigest.update(bytes, 0, numBytes);
        readBytes += numBytes;//from   w  w  w .j  a va 2 s  .co  m
        if (sizeInBytes != 0L) {
            double percentage = (double) readBytes * 100. / (double) sizeInBytes;
            changeState(percentage, onChange);
        }
    }
    return messageDigest.digest();
}

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From source file:com.titilink.common.app.EncryptDecryptUtil.java

public void testMD5() throws NoSuchAlgorithmException {
    MessageDigest md = MessageDigest.getInstance("MD5");
    md.reset();
    byte[] retArr = md.digest("this is a security string".getBytes(Charset.forName("UTF-8")));
    System.out.println(Hex.encodeHexString(retArr));

    byte[] retArr1 = md.digest("this is a security string".getBytes(Charset.forName("UTF-8")));
    System.out.println(Hex.encodeHexString(retArr1));

    byte[] retArr2 = md.digest("this is a security string.".getBytes(Charset.forName("UTF-8")));
    System.out.println(Hex.encodeHexString(retArr2));

    byte[] retArr3 = md.digest("this is a security string.".getBytes(Charset.forName("UTF-8")));
    System.out.println(Hex.encodeHexString(retArr3));
}

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From source file:cdr.forms.DepositFile.java

private byte[] getDigest(String algorithm) throws NoSuchAlgorithmException, IOException {

    InputStream input = null;/*from   w  w  w. ja v a  2s. c o m*/

    try {

        MessageDigest messageDigest = MessageDigest.getInstance(algorithm);
        messageDigest.reset();

        input = new FileInputStream(file);

        byte[] buffer = new byte[1048576];
        int count;

        while ((count = input.read(buffer, 0, buffer.length)) != -1) {
            messageDigest.update(buffer, 0, count);
        }

        return messageDigest.digest();

    } finally {

        if (input != null) {
            input.close();
        }

    }

}

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From source file:cz.cas.lib.proarc.common.export.mets.MetsUtils.java

/**
 *
 * Generates an MD5 checksum and copies a file (image) to defined
 * OutputStream/*ww  w  .j  a  v  a  2 s  .  co  m*/
 *
 * @param is
 * @param os
 * @return
 * @throws NoSuchAlgorithmException
 * @throws IOException
 */
public static FileMD5Info getDigestAndCopy(InputStream is, OutputStream os)
        throws NoSuchAlgorithmException, IOException {
    MessageDigest md = MessageDigest.getInstance("MD5");
    md.reset();
    byte[] bytes = new byte[2048];
    int numBytes;
    long totalBytes = 0;
    while ((numBytes = is.read(bytes)) > 0) {
        totalBytes += numBytes;
        md.update(bytes, 0, numBytes);
        os.write(bytes, 0, numBytes);
    }
    byte[] digest = md.digest();
    os.close();
    is.close();
    String result = new String(Hex.encodeHex(digest));
    return new FileMD5Info(result, totalBytes);
}

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From source file:org.sonar.batch.scan.filesystem.FileMetadata.java

/**
 * Compute hash of a file ignoring line ends differences.
 * Maximum performance is needed./*from w w w.j  a  v  a 2  s.co  m*/
 */
Metadata read(File file, Charset encoding) {
    Reader reader = null;
    int lines = 0;
    char c = (char) -1;
    try {
        MessageDigest md5Digest = DigestUtils.getMd5Digest();
        md5Digest.reset();
        reader = new BufferedReader(new InputStreamReader(new FileInputStream(file), encoding));
        int i = reader.read();
        boolean afterCR = false;
        while (i != -1) {
            c = (char) i;
            if (afterCR) {
                afterCR = false;
                if (c == LINE_FEED) {
                    // Ignore
                    i = reader.read();
                    continue;
                }
            }
            if (c == CARRIAGE_RETURN) {
                afterCR = true;
                c = LINE_FEED;
            }
            if (c == LINE_FEED) {
                lines++;
            }
            md5Digest.update(charToBytesUTF(c));
            i = reader.read();
        }
        if (c != (char) -1) {
            lines++;
        }
        String hash = Hex.encodeHexString(md5Digest.digest());
        return new Metadata(lines, hash);

    } catch (IOException e) {
        throw new IllegalStateException(
                String.format("Fail to read file '%s' with encoding '%s'", file.getAbsolutePath(), encoding),
                e);
    } finally {
        IOUtils.closeQuietly(reader);
    }
}

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From source file:org.shredzone.cilla.view.ResourceView.java

/**
 * Sets up the internal cache for the resource's etag and content length.
 *
 * @param pack/*from ww w  .j ava 2 s . c o  m*/
 *            Resource pack
 * @param name
 *            Resource name
 * @return Map key
 */
private String setup(String pack, String name) throws IOException {
    String key = pack + '/' + name;

    if (!(etagMap.containsKey(key) && sizeMap.containsKey(key))) {
        try (InputStream in = ResourceView.class.getResourceAsStream("/public/" + pack + '/' + name)) {
            MessageDigest md5 = MessageDigest.getInstance("MD5");
            md5.reset();

            int counter = 0;

            byte[] buffer = new byte[4096];
            int length;
            while ((length = in.read(buffer)) >= 0) {
                md5.update(buffer, 0, length);
                counter += length;
            }

            byte[] digest = md5.digest();
            etagMap.put(key, IntStream.range(0, digest.length)
                    .mapToObj(ix -> String.format("%02x", digest[ix] & 0xFF)).collect(joining("", "\"", "\"")));

            sizeMap.put(key, counter);
        } catch (NoSuchAlgorithmException ex) {
            // we expect no exception, since MD5 is a standard digester
            throw new InternalError();
        }
    }

    return key;
}

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From source file:org.codehaus.mojo.mrm.impl.digest.MD5DigestFileEntry.java

/**
 * Generates the digest.//from w w  w .ja  v a  2  s .  c o  m
 *
 * @return the digest.
 * @throws IOException if the backing entry could not be read.
 * @since 1.0
 */
private byte[] getContent() throws IOException {
    InputStream is = null;
    try {
        MessageDigest digest = MessageDigest.getInstance("MD5");
        digest.reset();
        byte[] buffer = new byte[8192];
        int read;
        try {
            is = entry.getInputStream();
            while ((read = is.read(buffer)) > 0) {
                digest.update(buffer, 0, read);
            }
        } catch (IOException e) {
            if (is != null) {
                throw e;
            }
        }
        final String md5 = StringUtils.leftPad(new BigInteger(1, digest.digest()).toString(16), 32, "0");
        return md5.getBytes();
    } catch (NoSuchAlgorithmException e) {
        IOException ioe = new IOException("Unable to calculate hash");
        ioe.initCause(e);
        throw ioe;
    } finally {
        IOUtils.closeQuietly(is);
    }
}

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