Example usage for java.security MessageDigest getInstance

List of usage examples for java.security MessageDigest getInstance

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Introduction

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

Prototype

public static MessageDigest getInstance(String algorithm) throws NoSuchAlgorithmException

Source Link

Document

Returns a MessageDigest object that implements the specified digest algorithm.

Usage

From source file:com.apexxs.neonblack.utilities.MD5Utilities.java

public static String getMD5Hash(String s) {
    String md5Hash = StringUtils.EMPTY;
    try {//from  w  w w .j a v  a 2 s . c  o m
        MessageDigest md = MessageDigest.getInstance("MD5");
        md.reset();
        byte[] bytes = md.digest(s.getBytes("UTF-8"));
        md5Hash = String.format("%032x", new BigInteger(1, bytes));
    } catch (Exception ex) {
        logger.error("Error generating MD5 hash from " + s + "\n" + ex.getMessage());
    }
    return md5Hash;
}

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

/**
 * , ?md5sha1.//from www. ja va 2 s .  c o  m
 */
private static byte[] digest(byte[] input, String algorithm, byte[] salt, int iterations) {
    try {
        MessageDigest digest = MessageDigest.getInstance(algorithm);

        if (salt != null) {
            digest.update(salt);
        }

        byte[] result = digest.digest(input);

        for (int i = 1; i < iterations; i++) {
            digest.reset();
            result = digest.digest(result);
        }
        return result;
    } catch (GeneralSecurityException e) {
        return null;
    }
}

From source file:com.myb.portal.util.Digests.java

/**
 * , ?md5sha1.//from w  ww.j  a v  a2s.  c o  m
 */
private static byte[] digest(byte[] input, String algorithm, byte[] salt, int iterations) {
    try {
        MessageDigest digest = MessageDigest.getInstance(algorithm);

        if (salt != null) {
            digest.update(salt);
        }

        byte[] result = digest.digest(input);

        for (int i = 1; i < iterations; i++) {
            digest.reset();
            result = digest.digest(result);
        }
        return result;
    } catch (GeneralSecurityException e) {
        //         throw Exceptions.unchecked(e);
    }
    return salt;
}

From source file:com.appdynamicspilot.util.MD5.java

/**
 * Returns the hashed value of <code>clear</code>.
 *///  ww  w  . j  a v a2  s.c o m
public static String hash(String clear) throws Exception {
    try {
        MessageDigest md = MessageDigest.getInstance("MD5");
        byte[] b = md.digest(clear.getBytes());

        int size = b.length;
        StringBuffer h = new StringBuffer(size);
        for (int i = 0; i < size; i++) {
            int u = b[i] & 255; // unsigned conversion
            if (u < 16) {
                h.append("0" + Integer.toHexString(u));
            } else {
                h.append(Integer.toHexString(u));
            }
        }
        return h.toString();
    } catch (Exception e) {
        throw new Exception(e);
    }
}

From source file:com.cmri.bpt.common.util.DigestUtil.java

/**
 * , ?md5sha1.//  w  w  w . j  a  v a2s  . c o  m
 */
private static byte[] digest(byte[] input, String algorithm, byte[] salt, int iterations) {
    try {
        MessageDigest digest = MessageDigest.getInstance(algorithm);

        if (salt != null) {
            digest.update(salt);
        }

        byte[] result = digest.digest(input);

        for (int i = 1; i < iterations; i++) {
            digest.reset();
            result = digest.digest(result);
        }
        return result;
    } catch (GeneralSecurityException e) {
        throw ExceptionUtil.asUnChecked(e);
    }
}

From source file:club.jmint.crossing.specs.Security.java

public static String MD5(String str) {
    char hexDigits[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
    try {//from   w  w w. j  a  v  a2s  .c o  m
        byte[] btInput = str.getBytes();
        MessageDigest mdInst = MessageDigest.getInstance("MD5");
        mdInst.update(btInput);
        byte[] md = mdInst.digest();

        int j = md.length;
        char mdstr[] = new char[j * 2];
        int k = 0;
        for (int i = 0; i < j; i++) {
            byte byte0 = md[i];
            mdstr[k++] = hexDigits[byte0 >>> 4 & 0xf];
            mdstr[k++] = hexDigits[byte0 & 0xf];
        }
        return new String(mdstr);
    } catch (Exception e) {
        CrossLog.printStackTrace(e);
        return null;
    }
}

From source file:com.ai.bss.util.user.DigestUtils.java

/**
 * Calculate the SHA1 hash for a given string.
 *
 * @param text the given text to hash to a SHA1
 * @return the SHA1 Hash/*from   w  ww .  j  ava2 s  .c o  m*/
 */
public static String sha1(String text) {
    Assert.notNull(text);
    try {
        MessageDigest md = MessageDigest.getInstance("SHA1");
        return hex(md.digest(text.getBytes("UTF-8")));
    } catch (NoSuchAlgorithmException ex) {
        throw new IllegalStateException(
                "Unable to calculate hash. No SHA1 hasher available in this Java implementation", ex);
    } catch (UnsupportedEncodingException ex) {
        throw new IllegalStateException(
                "Unable to calculate hash. UTF-8 encoding is not available in this Java implementation", ex);
    }
}

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

/**
 * , ?md5sha1.// w w w. j a  v a 2s.c o m
 */
private static byte[] digest(byte[] input, String algorithm, byte[] salt, int iterations) {
    try {
        MessageDigest digest = MessageDigest.getInstance(algorithm);

        if (salt != null) {
            digest.update(salt);
        }

        byte[] result = digest.digest(input);

        for (int i = 1; i < iterations; i++) {
            digest.reset();
            result = digest.digest(result);
        }
        return result;
    } catch (GeneralSecurityException e) {
        throw new RuntimeException(e);
    }
}

From source file:com.codemarvels.ant.aptrepotask.utils.Utils.java

/**
 * Compute the given message digest for a file.
 * /*from   w w  w  . ja  v a 2 s .  co m*/
 * @param hashType algorithm to be used (as {@code String})
 * @param file File to compute the digest for (as {@code File}).
 * @return A {@code String} for the hex encoded digest.
 * @throws MojoExecutionException
 */
public static String getDigest(String hashType, File file) {
    try {
        FileInputStream fis = new FileInputStream(file);
        BufferedInputStream bis = new BufferedInputStream(fis);
        MessageDigest digest = MessageDigest.getInstance(hashType);
        DigestInputStream dis = new DigestInputStream(bis, digest);
        @SuppressWarnings("unused")
        int ch;
        while ((ch = dis.read()) != -1)
            ;
        String hex = new String(Hex.encodeHex(digest.digest()));
        fis.close();
        bis.close();
        dis.close();
        return hex;
    } catch (NoSuchAlgorithmException e) {
        throw new RuntimeException("could not create digest", e);
    } catch (FileNotFoundException e) {
        throw new RuntimeException("could not create digest", e);
    } catch (IOException e) {
        throw new RuntimeException("could not create digest", e);
    }
}

From source file:com.cyphermessenger.utils.Utils.java

public static byte[] sha256(byte[] s) {
    try {/*from  ww  w  .  ja  v  a2  s  .  c om*/
        return MessageDigest.getInstance("SHA-256").digest(s);
    } catch (NoSuchAlgorithmException ex) {
        Logger.getLogger(Utils.class.getName()).log(Level.SEVERE, null, ex);
        return null;
    }
}