de.sekmi.li2b2.services.impl.pm.UserImpl Maven / Gradle / Ivy

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This project emulates the core components of an i2b2 server backend. Basic functionality of PM, CRC, ONT and WORK cells allows the official i2b2 webclient to connect ot this emulated server.
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package de.sekmi.li2b2.services.impl.pm;

import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.charset.StandardCharsets;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.ArrayList;
import java.util.Base64;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlTransient;

import de.sekmi.li2b2.api.pm.Parameter;
import de.sekmi.li2b2.api.pm.Project;
import de.sekmi.li2b2.api.pm.User;
import de.sekmi.li2b2.services.PMService;

/**
 * Implementation of li2b2 user.
 * Two users are equal, if their login and domain match.
 * 
 * @author R.W.Majeed
 *
 */
@XmlAccessorType(XmlAccessType.FIELD)
public class UserImpl implements User {
	
	@XmlTransient
	ProjectManagerImpl pm;
	private String login;
	private String password;
	private Map properties;
	private List params;

	private UserImpl() {
		// empty constructor for JAXB
		this.properties = new HashMap<>();
		this.params = new ArrayList<>();
	}
	public UserImpl(ProjectManagerImpl pm, String login){
		this();
		this.pm = pm;
		this.login = login;
		//this.domain = domain;
	}
	@Override
	public String getName() {
		return login;
	}
	protected void setName(String login) {
		this.login = login;
	}

	@Override
	public String getFullName() {
		return properties.get(PMService.USER_FULLNAME);
	}

	@Override
	public boolean isAdmin() {
		String admin = getProperty(PMService.USER_ISADMIN);
		return admin != null && admin.contentEquals(Boolean.TRUE.toString());
	}

	@Override
	public Iterable getProjects() {
		return pm.getUserProjects(this);
	}

	@Override
	public boolean hasPassword(char[] password) {
		if( this.password == null ){
			// no password, cannot login
			return false;
		}
		return this.password.equals(calculatePasswordDigest(password));
	}

	/**
	 * Calculate the message digest for the given password.
	 * To prevent rainbow table attacks, the user name is added to the digest input.
	 * @param password password
	 * @return message digest output
	 */
	private String calculatePasswordDigest(char[] password) {
		MessageDigest md;
		try {
			md = MessageDigest.getInstance(pm.getPasswordDigestAlgorithm());
		} catch (NoSuchAlgorithmException e) {
			throw new IllegalStateException("Unsupported password digest algorithm "+pm.getPasswordDigestAlgorithm());
		}
		CharBuffer in = CharBuffer.allocate(login.length()+password.length);
		in.append(login);
		in.append(CharBuffer.wrap(password));
		in.flip();
		ByteBuffer bytes = StandardCharsets.UTF_8.encode(in);
		byte[] b = new byte[bytes.remaining()];
		bytes.get(b);
		
		b = md.digest(b);
		String result = Base64.getEncoder().encodeToString(b);
		return result;
	}
	@Override
	public void setPassword(char[] newPassword) {
		
		this.password = calculatePasswordDigest(newPassword);
	}
	@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result + ((properties == null) ? 0 : properties.hashCode());
		result = prime * result + login.hashCode();
		return result;
	}
	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		UserImpl other = (UserImpl) obj;
		if (properties == null) {
			if (other.properties != null)
				return false;
		} else if (!properties.equals(other.properties))
			return false;
		
		if (!login.equals(other.login))
			return false;
		return true;
	}

	@Override
	public void setAdmin(boolean admin) {
		if( admin == false ) {
			properties.remove(PMService.USER_ISADMIN);
		}else {
			setProperty(PMService.USER_ISADMIN, Boolean.TRUE.toString());
		}
	}
	@Override
	public Map getProperties() {
		return this.properties;
	}
	@Override
	public String getProperty(String key) {
		return properties.get(key);
	}
	@Override
	public void setProperty(String key, String value) {
		properties.put(key, value);
	}
	@Override
	public List getParameters() {
		return this.params;
	}
	@Override
	public ParamImpl addParameter(String name, String datatype, String value) {
		ParamImpl param = new ParamImpl(name,datatype,value);
		this.params.add(param);
		return param;
	}
	@Override
	public Parameter updateParameter(int index, String name, String datatype, String value) {
		ParamImpl param = new ParamImpl(name,datatype,value);
		return this.params.set(index, param);
	}
}