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.smallfe.clerk.util.DigestUtil.java

public static String getSHA256(String message) {
    try {// www  . j  a  v a  2  s .  c o  m
        MessageDigest md = MessageDigest.getInstance("SHA-256");
        md.update(message.getBytes());

        byte byteData[] = md.digest();

        //convert the byte to hex format method 1
        StringBuffer sb = new StringBuffer();
        for (int i = 0; i < byteData.length; i++) {
            sb.append(Integer.toString((byteData[i] & 0xff) + 0x100, 16).substring(1));
        }
        return sb.toString();
    } catch (NoSuchAlgorithmException ex) {
        Logger.getLogger(DigestUtil.class.getName()).log(Level.SEVERE, null, ex);
        return null;
    }
}

From source file:Main.java

public static String getFileMD5String(File file) {
    if (!file.exists() || file.isFile()) {
        return null;
    }/*from  w w  w.  j  a  va  2 s.  c  o  m*/
    MessageDigest messagedigest;
    FileInputStream fis = null;
    try {
        fis = new FileInputStream(file);
        messagedigest = MessageDigest.getInstance("MD5");
        int len;
        byte[] buf = new byte[1024];
        while ((len = fis.read(buf)) != -1) {
            messagedigest.update(buf, 0, len);
        }
        byte md5Bytes[] = messagedigest.digest();
        StringBuffer stringbuffer = new StringBuffer();
        for (int i = 0; i < md5Bytes.length; i++) {
            stringbuffer.append(HEX_DIGITS[(md5Bytes[i] & 0xf0) >>> 4]);
            stringbuffer.append(HEX_DIGITS[md5Bytes[i] & 0x0f]);
        }
        return stringbuffer.toString();
    } catch (IOException e) {
        e.printStackTrace();
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    } finally {
        if (fis != null) {
            try {
                fis.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
    return null;
}

From source file:Main.java

public static byte[] encryptMD5File(File file) {
    FileInputStream in = null;/*from  w ww. jav  a  2 s .  c  om*/
    try {
        in = new FileInputStream(file);
        FileChannel channel = in.getChannel();
        MappedByteBuffer buffer = channel.map(FileChannel.MapMode.READ_ONLY, 0, file.length());
        MessageDigest md = MessageDigest.getInstance("MD5");
        md.update(buffer);
        return md.digest();
    } catch (NoSuchAlgorithmException | IOException e) {
        e.printStackTrace();
    } finally {
        if (in != null) {
            try {
                in.close();
            } catch (IOException ignored) {
            }
        }
    }
    return null;
}

From source file:BD.Encriptador.java

public static String Encriptar(String texto) {

    String secretKey = "qualityinfosolutions"; //llave para encriptar datos
    String base64EncryptedString = "";

    try {/*  w w  w  .j  ava2 s.c  om*/

        MessageDigest md = MessageDigest.getInstance("MD5");
        byte[] digestOfPassword = md.digest(secretKey.getBytes("utf-8"));
        byte[] keyBytes = Arrays.copyOf(digestOfPassword, 24);

        SecretKey key = new SecretKeySpec(keyBytes, "DESede");
        Cipher cipher = Cipher.getInstance("DESede");
        cipher.init(Cipher.ENCRYPT_MODE, key);

        byte[] plainTextBytes = texto.getBytes("utf-8");
        byte[] buf = cipher.doFinal(plainTextBytes);
        byte[] base64Bytes = Base64.encodeBase64(buf);
        base64EncryptedString = new String(base64Bytes);

    } catch (Exception ex) {
    }
    return base64EncryptedString;
}

From source file:Main.java

public static String keyHash(Context context) {
    String key = "";
    try {/* w w w  .j  av  a  2s .  com*/
        PackageInfo info = context.getPackageManager().getPackageInfo("org.tathva.triloaded.anubhava",
                PackageManager.GET_SIGNATURES);
        for (Signature signature : info.signatures) {
            MessageDigest md = MessageDigest.getInstance("SHA");
            md.update(signature.toByteArray());
            key = Base64.encodeToString(md.digest(), Base64.DEFAULT);
            Log.d("anas", key);
        }
    } catch (NameNotFoundException e) {

    } catch (NoSuchAlgorithmException e) {

    }

    return key;
}

From source file:Main.java

static String getSHA1CertFingerprint(Context ctx) {
    try {//www .  ja v  a 2 s.co  m
        Signature[] sigs = ctx.getPackageManager().getPackageInfo(ctx.getPackageName(),
                PackageManager.GET_SIGNATURES).signatures;
        if (sigs.length == 0) {
            return "ERROR: NO SIGNATURE.";
        } else if (sigs.length > 1) {
            return "ERROR: MULTIPLE SIGNATURES";
        }
        byte[] digest = MessageDigest.getInstance("SHA1").digest(sigs[0].toByteArray());
        StringBuilder hexString = new StringBuilder();
        for (int i = 0; i < digest.length; ++i) {
            if (i > 0) {
                hexString.append(":");
            }
            byteToString(hexString, digest[i]);
        }
        return hexString.toString();

    } catch (PackageManager.NameNotFoundException ex) {
        ex.printStackTrace();
        return "(ERROR: package not found)";
    } catch (NoSuchAlgorithmException ex) {
        ex.printStackTrace();
        return "(ERROR: SHA1 algorithm not found)";
    }
}

From source file:Main.java

private static String hashWithAlgorithm(String algorithm, byte[] bytes) {
    MessageDigest hash;//  w  w  w . j  ava 2 s  . co m
    try {
        hash = MessageDigest.getInstance(algorithm);
    } catch (NoSuchAlgorithmException e) {
        return null;
    }
    return hashBytes(hash, bytes);
}

From source file:Main.java

public static byte[] calculateMd5(String filePath) throws IOException {
    try {//w  w w.j  a  v  a  2 s .  c o m
        MessageDigest digest = MessageDigest.getInstance("MD5");
        byte[] buffer = new byte[4 * 1024];
        InputStream is = new FileInputStream(new File(filePath));
        int lent;
        while ((lent = is.read(buffer)) != -1) {
            digest.update(buffer, 0, lent);
        }
        is.close();
        return digest.digest();
    } catch (NoSuchAlgorithmException e) {
        throw new RuntimeException("MD5 algorithm not found.");
    }
}

From source file:eds.component.encryption.EncryptionUtility.java

public static String getHash(String transactionId, EncryptionType type) {
    String secureHash = transactionId;
    MessageDigest md;//  w  w  w  .jav a 2  s  .  co  m
    String hashedID = "";
    byte[] hash;
    try {
        //md = MessageDigest.getInstance("SHA-256");
        md = MessageDigest.getInstance(type.toString());
        hash = md.digest(secureHash.getBytes("UTF-8"));
        hashedID = new String(Hex.encodeHex(hash));//String.format("%032x", new BigInteger(hash));;//String.format("%032x", Arrays.toString(hash));
    } catch (NoSuchAlgorithmException | UnsupportedEncodingException ex) {
        throw new RuntimeException("No such algorithm or encoding method: " + ex.getMessage());
    }

    return hashedID;
}

From source file:lib.clases_cripto.java

public static String Encriptar(String texto) {

    String secretKey = "qualityinfosolutions"; //llave para encriptar datos
    String base64EncryptedString = "";

    try {/*  w  w  w .  ja v a2s.c o  m*/

        MessageDigest md = MessageDigest.getInstance("MD5");
        byte[] digestOfPassword = md.digest(texto.getBytes("utf-8"));
        byte[] keyBytes = Arrays.copyOf(digestOfPassword, 24);
        Md5Crypt.md5Crypt(keyBytes);
        SecretKey key = new SecretKeySpec(keyBytes, "DESede");
        Cipher cipher = Cipher.getInstance("DESede");
        cipher.init(Cipher.ENCRYPT_MODE, key);
        byte[] plainTextBytes = texto.getBytes("utf-8");
        byte[] buf = cipher.doFinal(plainTextBytes);
        byte[] base64Bytes = Base64.encodeBase64(buf);

        base64EncryptedString = new String(base64Bytes);

    } catch (Exception ex) {
    }
    return base64EncryptedString;
}