/*
 * Copyright (c) 2004-2019, University of Oslo
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 * Neither the name of the HISP project nor the names of its contributors may
 * be used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package org.hisp.dhis.android.core.utils;

import com.google.android.gms.common.util.Hex;

import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
import okio.ByteString;

public final class UserUtils {

    private UserUtils() {
        // no instances
    }

    public static String base64(String username, String password) {
        try {
            String usernameAndPassword = username + ":" + password;
            byte[] bytes = usernameAndPassword.getBytes("ISO-8859-1");
            return ByteString.of(bytes).base64();
        } catch (UnsupportedEncodingException unsupportedEncodingException) {
            throw new AssertionError(unsupportedEncodingException);
        }
    }

    @SuppressFBWarnings("DM_CONVERT_CASE")
    public static String md5(String username, String password) {
        try {
            String credentials = usernameAndPassword(username, password);
            MessageDigest md = MessageDigest.getInstance("MD5");
            md.reset();
            md.update(credentials.getBytes("ISO-8859-1"));
            return Hex.bytesToStringUppercase(md.digest()).toLowerCase();
        } catch (NoSuchAlgorithmException noSuchAlgorithmException) {
            // noop. Every implementation of Java is required to support MD5
            throw new AssertionError(noSuchAlgorithmException);
        } catch (UnsupportedEncodingException unsupportedEncodingException) {
            throw new AssertionError(unsupportedEncodingException);
        }
    }

    private static String usernameAndPassword(String username, String password) {
        return username + ":" + password;
    }
}

@@ -2402,16 +2402,17 @@
 arnings(
+%7B
 %22DM_CONV
@@ -2420,16 +2420,77 @@
 RT_CASE%22
+%7D)%0A    @SuppressWarnings(%7B%22PMD.UseLocaleWithCaseConversions%22%7D
 )%0A    pu

Fix PMD warnings