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.uzhnu.reedmuller.api.JsonFileCache.java

private static String getSha1Hash(String input) throws Exception {
    String retval = null;//from   www  . j a  va2s  .c  o  m
    ByteArrayInputStream inputStream = new ByteArrayInputStream(input.getBytes("UTF-8"));
    MessageDigest hash = MessageDigest.getInstance("SHA1");
    byte[] buffer = new byte[1024];

    int numRead = 0;
    while ((numRead = inputStream.read(buffer)) != -1) {
        hash.update(buffer, 0, numRead);
    }

    retval = toHexString(hash.digest());
    return retval;
}

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From source file:edu.hm.muse.controller.Logincontroller.java

public static String calculateSHA256(InputStream is) {
    String output;/*from w ww.ja v  a2  s . c o  m*/
    int read;
    byte[] buffer = new byte[8192];
    try {
        MessageDigest digest = MessageDigest.getInstance("SHA-256");
        while ((read = is.read(buffer)) > 0) {
            digest.update(buffer, 0, read);
        }
        byte[] hash = digest.digest();
        BigInteger bigInt = new BigInteger(1, hash);
        output = bigInt.toString(16);
    } catch (Exception e) {
        e.printStackTrace(System.err);
        return "0";
    }
    return output;
}

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From source file:Main.java

public static String smallFileSha1(File file) {
    InputStream inputStream = null;
    try {/*from  w w w  .j av  a  2 s .  c om*/
        MessageDigest md = MessageDigest.getInstance("SHA1");
        inputStream = new BufferedInputStream(new FileInputStream(file));
        byte[] buffer = new byte[1024];
        int nRead = 0;
        while ((nRead = inputStream.read(buffer)) != -1) {
            md.update(buffer, 0, nRead);
        }
        byte[] digest = md.digest();
        byte[] blockBytes = ByteBuffer.allocate(4).order(ByteOrder.LITTLE_ENDIAN).putInt(1).array();
        byte[] result = ByteBuffer.allocate(4 + digest.length).put(blockBytes, 0, 4)
                .put(digest, 0, digest.length).array();
        return Base64.encodeToString(result, Base64.URL_SAFE | Base64.NO_WRAP);
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        if (inputStream != null) {
            try {
                inputStream.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
    return null;
}

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From source file:Main.java

public static String getFileMd5String(File file) {
    if (!file.isFile())
        throw new IllegalArgumentException("only file can calculate MD5 value!");

    MessageDigest digest;
    FileInputStream in = null;/*from w w  w.  j av a 2s . co  m*/
    byte buffer[] = new byte[8192];
    int len;
    try {
        digest = MessageDigest.getInstance("MD5");
        in = new FileInputStream(file);
        while ((len = in.read(buffer)) != -1) {
            digest.update(buffer, 0, len);
        }
        BigInteger bigInt = new BigInteger(1, digest.digest());
        return bigInt.toString(16);
    } catch (Exception e) {
        e.printStackTrace();
        return null;
    } finally {
        try {
            if (in != null)
                in.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

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From source file:com.amazonaws.util.Md5Utils.java

/**
 * Computes the MD5 hash of the data in the given input stream and returns
 * it as an array of bytes./*from   ww  w.ja  v  a2  s.  c om*/
 * Note this method closes the given input stream upon completion.
 */
public static byte[] computeMD5Hash(InputStream is) throws IOException {
    BufferedInputStream bis = new BufferedInputStream(is);
    try {
        MessageDigest messageDigest = MessageDigest.getInstance("MD5");
        byte[] buffer = new byte[SIXTEEN_K];
        int bytesRead;
        while ((bytesRead = bis.read(buffer, 0, buffer.length)) != -1) {
            messageDigest.update(buffer, 0, bytesRead);
        }
        return messageDigest.digest();
    } catch (NoSuchAlgorithmException e) {
        // should never get here
        throw new IllegalStateException(e);
    } finally {
        try {
            bis.close();
        } catch (Exception e) {
            LogFactory.getLog(Md5Utils.class).debug("Unable to close input stream of hash candidate: " + e);
        }
    }
}

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From source file:Main.java

public static synchronized boolean downloadFileMD5Check(File f, String expectedMD5) {
    boolean flag = false;
    try {/*from w w  w .j  av a  2s  .  c  o  m*/
        MessageDigest md = MessageDigest.getInstance("MD5");
        FileInputStream fis = new FileInputStream(f);
        byte[] b = new byte[1024];
        int len = 0;
        while ((len = fis.read(b)) != -1) {
            md.update(b, 0, len);
        }

        if (md5(md).equals(expectedMD5)) {
            flag = true;
        }
        fis.close();
    } catch (Exception e) {
        e.printStackTrace();
    }

    return flag;
}

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From source file:org.berlin_vegan.bvapp.acra.ACRAPostSender.java

private static String md5(String s) {
    MessageDigest m = null;
    try {//from   ww w. j  a  v a 2s .c o m
        m = MessageDigest.getInstance("MD5");
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    }
    m.update(s.getBytes(), 0, s.length());
    return new BigInteger(1, m.digest()).toString(16);
}

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From source file:Main.java

public static byte[] copyFile(InputStream is, FileOutputStream os) throws IOException {
    MessageDigest digester = null;
    try {/*from  w ww .j a va 2 s .c  o  m*/
        digester = MessageDigest.getInstance("MD5");

        byte[] buffer = new byte[16 * 1024];
        int length;
        while ((length = is.read(buffer)) > 0) {
            os.write(buffer, 0, length);
            digester.update(buffer, 0, length);
        }
        os.flush();
        os.close();

        //os.getFD().sync();
        //Log.d(TAG, "done copying");
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        is.close();
        Log.d(TAG, "done copying");
    }
    if (digester != null) {
        byte[] digest = digester.digest();
        return digest;
    }

    return null;
}

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From source file:Main.java

public static String getFileMD5(File file) {
    if (!file.isFile()) {
        return null;
    }//ww w.ja  va2 s.  co m
    MessageDigest digest = null;
    FileInputStream in = null;
    byte buffer[] = new byte[1024];
    int len;
    try {
        digest = MessageDigest.getInstance("MD5");
        in = new FileInputStream(file);
        while ((len = in.read(buffer, 0, 1024)) != -1) {
            digest.update(buffer, 0, len);
        }
        in.close();
    } catch (Exception e) {
        e.printStackTrace();
        return null;
    }
    BigInteger bigInt = new BigInteger(1, digest.digest());
    return bigInt.toString(16);
}

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From source file:cc.arduino.plugins.wifi101.flashers.java.NinaFlasher.java

public static byte[] getMD5Checksum(byte[] buffer) throws Exception {
    try {/*from w ww. ja  v  a 2 s. co  m*/
        MessageDigest complete = MessageDigest.getInstance("MD5");
        int numRead = buffer.length;
        if (numRead > 0) {
            complete.update(buffer, 0, numRead);
        }
        return complete.digest();
    } catch (Exception e) {
        throw new Exception("Error in MD5 checksum computation.");
    }
}

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