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:org.dcache.xrootd.plugins.authn.gsi.CertUtil.java

/**
 * Computes the hash from the principal, using the passed-in digest
 * (usually MD5).  After applying the digest on the DER-encoded
 * principal, the first 4 bytes of the computed hash are taken and
 * interpreted as a hexadecimal integer in Little Endian. This
 * corresponds to the openssl hash mechanism.
 *
 * Keep a cache of principals, as this method will often be called
 * with the same principal (to avoid costly rehashing).
 *
 * @param md the digest instance/*from  ww w .  j a  v a  2 s  . c o m*/
 * @param principal the principal (subject or issuer)
 * @return the 8-digit hexadecimal hash
 */
public static String computeHash(MessageDigest md, X500Principal principal) {
    String principalHash;

    if (_hashCache.containsKey(principal)) {
        principalHash = _hashCache.get(principal);
    } else {
        md.reset();
        md.update(principal.getEncoded());
        byte[] md5hash = md.digest();

        // take the first 4 bytes in little Endian
        int shortHash = (0xff & md5hash[3]) << 24 | (0xff & md5hash[2]) << 16 | (0xff & md5hash[1]) << 8
                | (0xff & md5hash[0]);

        // convert to hex
        principalHash = Integer.toHexString(shortHash);
        _hashCache.put(principal, principalHash);
    }

    return principalHash;
}

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From source file:io.manasobi.utils.DigestUtils.java

/**
 *  ? ?  .<br>/*from   w w  w. j a v a2  s. co m*/
 *    - "MD5", "SHA-1", "SHA-256"<br>
 * ? ? ? ?? ? - MD5: 32?, SHA-1: 40?, SHA-256: 64?
 * 
 * @param password    ?
 * @param secure    
 * @return ? ? ? ?
 */
public static String encodePassword(String password, Secure secure) {

    byte[] unencodedPassword = password.getBytes();

    MessageDigest md = null;

    try {
        md = MessageDigest.getInstance(secure.getAlgorithm());
    } catch (Exception e) {
        throw new DigestUtilsException(e.getMessage());
    }

    md.reset();
    md.update(unencodedPassword);

    byte[] encodedPassword = md.digest();

    StringBuilder sb = new StringBuilder();

    for (int i = 0; i < encodedPassword.length; i++) {
        if (((int) encodedPassword[i] & HEX_FF) < HEX_10) {
            sb.append("0");
        }

        sb.append(Long.toString((int) encodedPassword[i] & HEX_FF, HEX));
    }

    return sb.toString();
}

---

From source file:com.cloud.test.utils.UtilsForTest.java

public static String createMD5String(String password) {
    MessageDigest md5;
    try {//from  w w  w  . j ava  2s .c  o  m
        md5 = MessageDigest.getInstance("MD5");
    } catch (NoSuchAlgorithmException e) {
        throw new CloudRuntimeException("Error", e);
    }

    md5.reset();
    BigInteger pwInt = new BigInteger(1, md5.digest(password.getBytes()));

    // make sure our MD5 hash value is 32 digits long...
    StringBuffer sb = new StringBuffer();
    String pwStr = pwInt.toString(16);
    int padding = 32 - pwStr.length();
    for (int i = 0; i < padding; i++) {
        sb.append('0');
    }
    sb.append(pwStr);
    return sb.toString();
}

---

From source file:com.xidu.framework.common.util.TokenUtils.java

/**
 * Encode a string using algorithm and return the resulting encrypted
 * password. If exception, the plain credentials string is returned
 * /*from   w ww.j ava 2 s  .co m*/
 * @param token
 *            Token or other credentials to use in authenticating this
 *            username
 * @param algorithm
 *            Algorithm used to do the digest
 * @return encypted password based on the algorithm.
 */
private static String encryptToken(String token, String algorithm) {
    byte[] unencodedToken = token.getBytes();

    MessageDigest md;

    try {
        // first create an instance, given the provider
        md = MessageDigest.getInstance(algorithm);
    } catch (Exception e) {
        logger.error("Exception: " + e);

        return token;
    }

    md.reset();

    // call the update method one or more times
    // (useful when you don't know the size of your data, eg. stream)
    md.update(unencodedToken);

    // now calculate the hash
    byte[] encodedToken = md.digest();

    StringBuffer buf = new StringBuffer();

    for (int i = 0; i < encodedToken.length; i++) {
        if (((int) encodedToken[i] & 0xff) < 0x10) {
            buf.append("0");
        }

        buf.append(Long.toString((int) encodedToken[i] & 0xff, 16));
    }

    return buf.toString();
}

---

From source file:io.cslinmiso.line.utils.Utility.java

public static String cryptWithMD5(String pass) {
    try {/*from w w  w. j a  v  a2 s.c o m*/
        MessageDigest md = MessageDigest.getInstance("MD5");
        byte[] passBytes = pass.getBytes();
        md.reset();
        byte[] digested = md.digest(passBytes);
        StringBuffer sb = new StringBuffer();
        for (int i = 0; i < digested.length; i++) {
            sb.append(Integer.toHexString(0xff & digested[i]));
        }
        // System.out.println(sb.toString());
        return sb.toString();
    } catch (NoSuchAlgorithmException ex) {
        // ?
    }
    return null;
}

---

From source file:StringUtils.java

/**
 * Encode a string using algorithm specified in web.xml and return the
 * resulting encrypted password. If exception, the plain credentials
 * string is returned//from  w  w  w . j a v a  2 s.  co m
 *
 * @param password Password or other credentials to use in authenticating
 *        this username
 * @param algorithm Algorithm used to do the digest
 *
 * @return encypted password based on the algorithm.
 */
public static String encodePassword(String password, String algorithm) {
    byte[] unencodedPassword = password.getBytes();

    MessageDigest md = null;

    try {
        // first create an instance, given the provider
        md = MessageDigest.getInstance(algorithm);
    } catch (Exception e) {
        System.out.println(e);

        return password;
    }

    md.reset();

    // call the update method one or more times
    // (useful when you don't know the size of your data, eg. stream)
    md.update(unencodedPassword);

    // now calculate the hash
    byte[] encodedPassword = md.digest();

    StringBuffer buf = new StringBuffer();

    for (int i = 0; i < encodedPassword.length; i++) {
        if ((encodedPassword[i] & 0xff) < 0x10) {
            buf.append("0");
        }

        buf.append(Long.toString(encodedPassword[i] & 0xff, 16));
    }

    return buf.toString();
}

---

From source file:MainFrame.HttpCommunicator.java

public static String md5Custom(String st) {
    MessageDigest messageDigest = null;
    byte[] digest = new byte[0];
    try {//from   w w w.  j  a v  a  2 s. c o  m
        messageDigest = MessageDigest.getInstance("MD5");
        messageDigest.reset();
        messageDigest.update(st.getBytes());
        digest = messageDigest.digest();
    } catch (NoSuchAlgorithmException e) {
        System.err.printf("MD-5 error");
    }

    BigInteger bigInt = new BigInteger(1, digest);
    String md5Hex = bigInt.toString(16);

    while (md5Hex.length() < 32) {
        md5Hex = "0" + md5Hex;
    }

    return md5Hex;
}

---

From source file:octavio.server.db.managers.UserManager.java

/**
 * Retourne la chaine de caractres fournie en paramtre hashe avec
 * l'algorithme configur.//  w ww . j  ava  2  s. c o  m
 *
 * @param password Mot de passe  hasher
 *
 * @return Mot de passe hash ou chane vide si algorithme indisponible
 */
public static String hashPassword(String password) {
    try {
        MessageDigest digest = MessageDigest.getInstance(Configuration.get("hash_algorithm", "SHA-1"));
        digest.reset();
        digest.update(password.getBytes());

        return new String(Hex.encodeHex(digest.digest()));
    } catch (NoSuchAlgorithmException exception) {
        Logger.printError(exception);
        return password;
    }
}

---

From source file:com.amazonaws.services.kinesis.log4j.helpers.AmazonKinesisPutRecordsHelper.java

public static int calculateShardBucket(String partitionKey, int totalNumOfShards) {
    MessageDigest m = null;
    int shardBucket = 1;
    try {/*from ww  w . j a  v  a2 s  . com*/
        m = MessageDigest.getInstance("MD5");
        m.reset();
        m.update(partitionKey.getBytes());
        byte[] digest = m.digest();
        BigInteger bigInt = new BigInteger(1, digest);
        shardBucket = bigInt.mod(BigInteger.valueOf(totalNumOfShards)).intValue() + 1;
    } catch (NoSuchAlgorithmException e) {
        //ignore
    }
    return shardBucket;
}

---

From source file:net.sourceforge.jaulp.file.checksum.ChecksumUtils.java

/**
 * Gets the checksum from the given byte array with an instance of.
 *
 * @param bytes/* w  ww.j av a  2 s  .co  m*/
 *            the byte array.
 * @param algorithm
 *            the algorithm to get the checksum. This could be for instance "MD4", "MD5",
 *            "SHA-1", "SHA-256", "SHA-384" or "SHA-512".
 * @return The checksum from the file as a String object.
 * @throws NoSuchAlgorithmException
 *             Is thrown if the algorithm is not supported or does not exists.
 *             {@link java.security.MessageDigest} object.
 */
public static String getChecksum(byte[] bytes, String algorithm) throws NoSuchAlgorithmException {
    MessageDigest messageDigest = MessageDigest.getInstance(algorithm);
    messageDigest.reset();
    messageDigest.update(bytes);
    byte digest[] = messageDigest.digest();
    StringBuilder hexView = new StringBuilder();
    for (byte element : digest) {
        String intAsHex = Integer.toHexString(0xFF & element);
        if (intAsHex.length() == 1) {
            hexView.append('0');
        }
        hexView.append(intAsHex);
    }
    return hexView.toString();
}

---

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