Example usage for java.security DigestInputStream DigestInputStream

Introduction

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

Prototype

public DigestInputStream(InputStream stream, MessageDigest digest) 

Source Link

Document

Creates a digest input stream, using the specified input stream and message digest.

Usage

From source file:MainClass.java

public static void main(String args[]) throws Exception {
    MessageDigest m = MessageDigest.getInstance("MD5");
    FileInputStream fin = new FileInputStream(args[0]);
    DigestInputStream din = new DigestInputStream(fin, m);
    while (din.read() != -1)
        ;//w  w  w.  j a  v a 2 s  .  c o m

    byte s[] = m.digest();
    for (int i = 0; i < s.length; i++) {
        System.out.print(Integer.toHexString((0x000000ff & s[i]) | 0xffffff00).substring(6));
    }
}

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From source file:Main.java

public static void main(String args[]) throws Exception {
    FileInputStream fis = new FileInputStream("test");
    MessageDigest md = MessageDigest.getInstance("SHA");
    DigestInputStream dis = new DigestInputStream(fis, md);
    ObjectInputStream ois = new ObjectInputStream(dis);
    Object o = ois.readObject();// w  w w  .j  ava 2s  .  com
    if (!(o instanceof String)) {
        System.out.println("Unexpected data in file");
        System.exit(-1);
    }
    String data = (String) o;
    System.out.println("Got message " + data);
    dis.on(false);
    o = ois.readObject();
    if (!(o instanceof byte[])) {
        System.out.println("Unexpected data in file");
        System.exit(-1);
    }
    byte origDigest[] = (byte[]) o;
    System.out.println(MessageDigest.isEqual(md.digest(), origDigest));
}

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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;/*w  ww  .  ja va2  s .c om*/
    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:com.lightboxtechnologies.spectrum.Uploader.java

public static void main(String[] args) throws Exception {
    final Configuration conf = new Configuration();
    final String[] otherArgs = new GenericOptionsParser(conf, args).getRemainingArgs();

    if (otherArgs.length != 1) {
        System.err.println("Usage: Uploader <dest path>");
        System.err.println("Writes data to HDFS path from stdin");
        System.exit(2);/*w w  w  .j a  v a 2 s.  c  o m*/
    }

    MessageDigest hasher = FsEntryUtils.getHashInstance("MD5");
    DigestInputStream hashedIn = new DigestInputStream(System.in, hasher);

    FileSystem fs = FileSystem.get(conf);
    Path path = new Path(otherArgs[0]);
    FSDataOutputStream outFile = fs.create(path, true);

    IOUtils.copyLarge(hashedIn, outFile, new byte[1024 * 1024]);

    System.out.println(new String(Hex.encodeHex(hasher.digest())));
}

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From source file:ch.bfh.evoting.verifier.Verifier.java

/**
 * This program is a verifier for MobiVote application with HKRS12 protocol
 * You have to indicate the XML file exported from the application as argument for this program.
 * You can also indicate the files of different participants. In this case, there will be checked if all files contain the same values.
 * @param args the file(s) containing the values of the protocol
 *///from  w  ww  .  ja v a  2s.  c  om
public static void main(String[] args) {

    /*
     * Reading files given as parameters
     */
    if (args.length < 1) {
        //Not enough arguments
        System.out.println(
                "You must indicate the location of the XML file containing the data to verify! You can also indicate the files of different participants.");
        return;
    } else if (args.length > 1) {
        //Make a digest of all files and compare them
        List<byte[]> digests = new ArrayList<byte[]>();
        for (String s : args) {
            try {
                MessageDigest md = MessageDigest.getInstance("SHA-256");

                InputStream is = Files.newInputStream(Paths.get(s));
                DigestInputStream dis = new DigestInputStream(is, md);
                @SuppressWarnings("unused")
                int numBytes = -1;
                while ((numBytes = dis.read()) != -1) {
                    dis.read();
                }

                byte[] digest = md.digest();
                digests.add(digest);

            } catch (IOException e) {
                System.out.println("One of the given files does not exists!");
                return;
            } catch (NoSuchAlgorithmException e1) {
                System.out.println("Unable to compute the digest of the file!");
                return;
            }
        }
        System.out.print("Checking the similarity of the files...");
        for (byte[] b : digests) {
            for (byte[] b2 : digests) {
                if (!Arrays.equals(b, b2)) {
                    System.out.print("\t\t\t\t\t\t\t\t\t\tWRONG\n");
                    System.out.println(
                            "The given files are not all identical! This means the content received by the participants was not the same.");
                    return;
                }
            }
        }
        System.out.print("\t\t\t\t\t\t\t\t\t\tOK\n\n");
    } else if (args.length == 1) {
        //Print a warning
        System.out.println(
                "BE CAREFUL: checking only one file ensure that the cryptographic values of the protocol are correct.\n"
                        + "But, it does NOT ensure that all users have the same result. This could happen when a participant missed some messages.\n"
                        + "This case is only covered by this verifier by giving multiple files as argument.\n");
    }

    Serializer serializer = new Persister();
    File source = new File(args[0]);

    poll = null;
    System.out.print("Reading file...");
    try {
        poll = serializer.read(XMLPoll.class, source);
        System.out.print("\t\t\t\t\t\t\t\t\t\t\t\t\tOK\n");
    } catch (Exception e) {
        System.out.print("\t\t\t\t\t\t\t\t\t\t\t\t\tFAILED\n");
        e.printStackTrace();
        return;
    }

    /*
     * Create the initializations needed by the protocol
     */
    G_q = GStarModSafePrime.getInstance(new BigInteger(poll.getP()));
    Z_q = G_q.getZModOrder();
    Zgroup = Z.getInstance();
    generator = poll.getGenerator().getValue(G_q);

    representations = new Element[poll.getOptions().size()];
    int i = 0;
    for (XMLOption op : poll.getOptions()) {
        representations[i] = op.getRepresentation().getValue(Z_q);
        i++;
    }

    System.out.println();
    System.out.println("Verifying vote: \"" + poll.getQuestion() + "\"");

    /*
     * Verify the dependence between cryptographic values and the vote properties
     */
    //Not used anymore, implicitly done with otherInputs of proofs
    //verifyDependencyTextCrypto();

    /*
     * Verify the proofs for the user
     */
    System.out.println();
    System.out.println("Verifying the proof for the participants...");
    a = new Element[poll.getParticipants().size()];
    b = new Element[poll.getParticipants().size()];
    h = new Element[poll.getParticipants().size()];
    hHat = new Element[poll.getParticipants().size()];
    hHatPowX = new Element[poll.getParticipants().size()];
    proofForX = new Element[poll.getParticipants().size()];
    validityProof = new Element[poll.getParticipants().size()];
    equalityProof = new Element[poll.getParticipants().size()];
    Tuple pollTuple = preparePollOtherInput(poll, representations, generator);

    int k = 0;
    for (XMLParticipant p : poll.getParticipants()) {
        System.out.println("\tParticipant " + p.getIdentification() + " (" + p.getUniqueId() + ")");

        if (p.getAi() != null) {
            a[k] = p.getAi().getValue(G_q);
            if (DEBUG)
                System.out.println("Value a: " + a[k]);
        }
        if (p.getHi() != null) {
            h[k] = p.getHi().getValue(G_q);
            if (DEBUG)
                System.out.println("Value h: " + h[k]);
        }
        if (p.getBi() != null) {
            b[k] = p.getBi().getValue(G_q);
            if (DEBUG)
                System.out.println("Value b: " + b[k]);
        }
        if (p.getHiHat() != null) {
            hHat[k] = p.getHiHat().getValue(G_q);
            if (DEBUG)
                System.out.println("Value h hat: " + hHat[k]);
        }
        if (p.getHiHatPowXi() != null) {
            hHatPowX[k] = p.getHiHatPowXi().getValue(G_q);
            if (DEBUG)
                System.out.println("Value h hat ^ x: " + hHatPowX[k]);
        }

        if (p.getProofForXi() != null) {
            ProductGroup group = ProductGroup.getInstance(G_q, Zgroup, Z_q);

            proofForX[k] = p.getProofForXi().getValue(group);
        }

        if (p.getProofValidVote() != null) {

            Group[] tripleElement1Groups = new Group[poll.getOptions().size()];
            Group[] tripleElement2Groups = new Group[poll.getOptions().size()];
            Group[] tripleElement3Groups = new Group[poll.getOptions().size()];
            for (i = 0; i < poll.getOptions().size(); i++) {
                tripleElement1Groups[i] = ProductGroup.getInstance(G_q, G_q);
                tripleElement2Groups[i] = Zgroup;
                tripleElement3Groups[i] = Z_q;
            }
            ProductGroup tripleElement1 = ProductGroup.getInstance(tripleElement1Groups);
            ProductGroup tripleElement2 = ProductGroup.getInstance(tripleElement2Groups);
            ProductGroup tripleElement3 = ProductGroup.getInstance(tripleElement3Groups);
            ProductGroup group = ProductGroup.getInstance(tripleElement1, tripleElement2, tripleElement3);

            validityProof[k] = p.getProofValidVote().getValue(group);

            if (DEBUG)
                System.out.println("Proof of validity: " + validityProof[k]);
        }

        if (p.getProofForHiHat() != null) {
            recoveryNeeded = true;
            ProductGroup group = ProductGroup.getInstance(ProductGroup.getInstance(G_q, G_q), Zgroup, Z_q);

            equalityProof[k] = p.getProofForHiHat().getValue(group);
        }

        Tuple participantTuple = prepareParticipantOtherInput(p);
        otherInput = Tuple.getInstance(participantTuple, pollTuple);

        /*
         * Verify proof of knowledge 
         */
        System.out.print("\t\tVerifying proof of knowledge of x value...");
        verifyProofOfKnowledgeOfX(k);

        /*
         * Verify proof of validity 
         */
        if (validityProof[k] != null) {
            System.out.print("\t\tVerifying proof of valid vote...");
            verifyValidityProof(k);
        }

        /*
         * Verify proof of equality 
         */
        if (equalityProof[k] != null) {
            System.out.print("\t\tVerifying proof of equality between discrete logarithm g^x and h_hat^x...");
            verifyEqualityProof(k);
        }
        k++;
    }

    /**
     * Computing the result
     */
    System.out.println();
    System.out.print("Computing the result...");
    computeResult();

}

---

From source file:Main.java

public static boolean checkMd5sum(File file, String checkCode) throws IOException {
    DigestInputStream dInput = null;
    try {/* w  ww.ja va 2 s  .  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);
    }
}

---

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  ww w  . j  a va2s  .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());
}

---

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;/*from w w  w. j av a 2s.  c om*/
    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());
}

---

From source file:Main.java

public static String getMD5(String file) {
    String md5 = "";

    try {/*from   w  w  w.j  ava2  s  .  c om*/
        MessageDigest md = MessageDigest.getInstance("MD5");
        InputStream is;
        is = new FileInputStream(file);

        DigestInputStream dis = new DigestInputStream(is, md);
        byte data[] = new byte[1024];
        @SuppressWarnings("unused")
        int count;
        while ((count = dis.read(data)) != -1) {

        }
        byte[] digest = md.digest();

        for (int i = 0; i < digest.length; i++) {
            md5 += Integer.toString((digest[i] & 0xff) + 0x100, 16).substring(1);
        }
        return md5;
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
    return md5;
}

---

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();//  w  w  w.  j ava  2  s  .  c om
    String s = new String(md.digest());
    System.out.println("Calculated result:  " + s);
}

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