Example usage for java.security DigestInputStream getMessageDigest

Introduction

In this page you can find the example usage for java.security DigestInputStream getMessageDigest.

Prototype

public MessageDigest getMessageDigest() 

Source Link

Document

Returns the message digest associated with this stream.

Usage

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    Security.addProvider(new BouncyCastleProvider());
    byte[] input = "www.java2s.com".getBytes();
    System.out.println("input     : " + new String(input));
    MessageDigest hash = MessageDigest.getInstance("SHA1");

    ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(input);
    DigestInputStream digestInputStream = new DigestInputStream(byteArrayInputStream, hash);
    ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();

    int ch;/*from   w  ww  .  ja v  a 2 s .  c  o  m*/
    while ((ch = digestInputStream.read()) >= 0) {
        byteArrayOutputStream.write(ch);
    }

    byte[] newInput = byteArrayOutputStream.toByteArray();
    System.out.println("in digest : " + new String(digestInputStream.getMessageDigest().digest()));

    byteArrayOutputStream = new ByteArrayOutputStream();
    DigestOutputStream digestOutputStream = new DigestOutputStream(byteArrayOutputStream, hash);
    digestOutputStream.write(newInput);
    digestOutputStream.close();

    System.out.println("out digest: " + new String(digestOutputStream.getMessageDigest().digest()));
}

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From source file:org.apache.sling.distribution.util.impl.DigestUtils.java

public static String readDigestMessage(DigestInputStream input) {
    return readDigestMessage(input.getMessageDigest());
}

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From source file:MainClass.java

static void performInputTest() throws Exception {
    MessageDigest md = MessageDigest.getInstance("SHA");
    FileInputStream fin = new FileInputStream("sha-results.txt");
    DigestInputStream in = new DigestInputStream(fin, md);
    byte[] b = new byte["testCase".getBytes().length];
    in.read(b, 0, "testCase".getBytes().length);
    md = in.getMessageDigest();
    String s = new String(md.digest());
    System.out.println("Calculated result:  " + s);
}

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From source file:MainClass.java

public static String md(String f) throws Exception {
    BufferedInputStream file = new BufferedInputStream(new FileInputStream(f));
    MessageDigest md = MessageDigest.getInstance("MD5");
    DigestInputStream in = new DigestInputStream(file, md);
    int i;/*from  w  ww  .j  a  v a2 s  .c o m*/
    byte[] buffer = new byte[BUFFER_SIZE];
    do {
        i = in.read(buffer, 0, BUFFER_SIZE);
    } while (i == BUFFER_SIZE);
    md = in.getMessageDigest();
    in.close();

    return new String(md.digest());
}

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From source file:MainClass.java

public static String md(String f) throws Exception {
    BufferedInputStream file = new BufferedInputStream(new FileInputStream(f));
    MessageDigest md = MessageDigest.getInstance("SHA-1");
    DigestInputStream in = new DigestInputStream(file, md);
    int i;//  w  w  w.j a v  a  2s .c o m
    byte[] buffer = new byte[BUFFER_SIZE];
    do {
        i = in.read(buffer, 0, BUFFER_SIZE);
    } while (i == BUFFER_SIZE);
    md = in.getMessageDigest();
    in.close();

    return new String(md.digest());
}

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From source file:org.duracloud.common.util.ChecksumUtil.java

/**
 * Determines the checksum value of a DigestInputStream's underlying
 * stream after the stream has been read.
 *
 * @param digestStream//w w w  .  j av  a  2s.co m
 * @return The checksum value of the stream's contents
 */
public static String getChecksum(DigestInputStream digestStream) {
    MessageDigest digest = digestStream.getMessageDigest();
    return checksumBytesToString(digest.digest());
}

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From source file:org.duracloud.common.util.ChecksumUtil.java

/**
 * Determines the checksum value of a DigestInputStream's underlying
 * stream after the stream has been read.
 *
 * @param digestStream//from   ww w .ja  v  a2 s  .  com
 * @return The checksum value of the stream's contents
 */
public static byte[] getChecksumBytes(DigestInputStream digestStream) {
    MessageDigest digest = digestStream.getMessageDigest();
    return digest.digest();
}

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From source file:Main.java

public static boolean checkMd5sum(File file, String checkCode) throws IOException {
    DigestInputStream dInput = null;
    try {/* ww  w  .j av a2s . co m*/
        FileInputStream fInput = new FileInputStream(file);
        dInput = new DigestInputStream(fInput, getMd5Instance());
        byte[] buf = new byte[8192];
        while (dInput.read(buf) > 0) {
        }
        byte[] bytes = dInput.getMessageDigest().digest();
        return bytes2hex(bytes).equals(checkCode);
    } finally {
        closeQuietly(dInput);
    }
}

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From source file:Main.java

public static String md5(InputStream in) {
    int bufferSize = 256 * 1024;
    DigestInputStream digestInputStream = null;
    try {//from w w w  .j a  v  a 2s .c om
        MessageDigest messageDigest = MessageDigest.getInstance("MD5");
        digestInputStream = new DigestInputStream(in, messageDigest);
        byte[] buffer = new byte[bufferSize];
        while (digestInputStream.read(buffer) > 0)
            ;
        messageDigest = digestInputStream.getMessageDigest();
        byte[] resultByteArray = messageDigest.digest();
        char[] hexDigits = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
        char[] resultCharArray = new char[resultByteArray.length * 2];
        int index = 0;
        for (byte b : resultByteArray) {
            resultCharArray[index++] = hexDigits[b >>> 4 & 0xf];
            resultCharArray[index++] = hexDigits[b & 0xf];
        }
        return new String(resultCharArray);
    } catch (NoSuchAlgorithmException e) {
        return null;
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        try {
            if (digestInputStream != null)
                digestInputStream.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    return null;
}

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From source file:Main.java

public static String encode(InputStream in) {
    int bufferSize = 256 * 1024;
    DigestInputStream digestInputStream = null;
    try {//  w ww.j  a v  a  2  s  . c o m
        MessageDigest messageDigest = MessageDigest.getInstance("MD5");
        digestInputStream = new DigestInputStream(in, messageDigest);
        byte[] buffer = new byte[bufferSize];
        while (digestInputStream.read(buffer) > 0)
            ;
        messageDigest = digestInputStream.getMessageDigest();
        byte[] resultByteArray = messageDigest.digest();
        char[] hexDigits = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
        char[] resultCharArray = new char[resultByteArray.length * 2];
        int index = 0;
        for (byte b : resultByteArray) {
            resultCharArray[index++] = hexDigits[b >>> 4 & 0xf];
            resultCharArray[index++] = hexDigits[b & 0xf];
        }
        return new String(resultCharArray);
    } catch (NoSuchAlgorithmException e) {
        return null;
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        try {
            if (digestInputStream != null)
                digestInputStream.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    return null;
}

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