package eu.siacs.conversations.entities; import android.content.ContentValues; import android.util.Base64; import java.io.UnsupportedEncodingException; import java.lang.Comparable; import java.security.MessageDigest; import java.security.NoSuchAlgorithmException; import java.util.ArrayList; import java.util.Collections; import java.util.List; import eu.siacs.conversations.xml.Element; import eu.siacs.conversations.xmpp.stanzas.IqPacket; public class ServiceDiscoveryResult { protected static String blankNull(String s) { return s == null ? "" : s; } public static class Identity implements Comparable { protected final String category; protected final String type; protected final String lang; protected final String name; public Identity(final String category, final String type, final String lang, final String name) { this.category = category; this.type = type; this.lang = lang; this.name = name; } public Identity(final Element el) { this.category = el.getAttribute("category"); this.type = el.getAttribute("type"); this.lang = el.getAttribute("xml:lang"); this.name = el.getAttribute("name"); } public String getCategory() { return this.category; } public String getType() { return this.type; } public String getLang() { return this.lang; } public String getName() { return this.name; } public int compareTo(Object other) { Identity o = (Identity)other; int r = blankNull(this.getCategory()).compareTo(blankNull(o.getCategory())); if(r == 0) { r = blankNull(this.getType()).compareTo(blankNull(o.getType())); } if(r == 0) { r = blankNull(this.getLang()).compareTo(blankNull(o.getLang())); } if(r == 0) { r = blankNull(this.getName()).compareTo(blankNull(o.getName())); } return r; } } protected final List identities; protected final List features; public ServiceDiscoveryResult(final List identities, final List features) { this.identities = identities; this.features = features; } public ServiceDiscoveryResult(final IqPacket packet) { this.identities = new ArrayList<>(); this.features = new ArrayList<>(); final List elements = packet.query().getChildren(); for (final Element element : elements) { if (element.getName().equals("identity")) { Identity id = new Identity(element); if (id.getType() != null && id.getCategory() != null) { identities.add(id); } } else if (element.getName().equals("feature")) { if (element.getAttribute("var") != null) { features.add(element.getAttribute("var")); } } } } public List getIdentities() { return this.identities; } public List getFeatures() { return this.features; } public boolean hasIdentity(String category, String type) { for(Identity id : this.getIdentities()) { if((category == null || id.getCategory().equals(category)) && (type == null || id.getType().equals(type))) { return true; } } return false; } public byte[] getCapHash() { StringBuilder s = new StringBuilder(); List identities = this.getIdentities(); Collections.sort(identities); for(Identity id : identities) { s.append( blankNull(id.getCategory()) + "/" + blankNull(id.getType()) + "/" + blankNull(id.getLang()) + "/" + blankNull(id.getName()) + "<" ); } List features = this.getFeatures(); Collections.sort(features); for (String feature : features) { s.append(feature + "<"); } // TODO: data forms? MessageDigest md; try { md = MessageDigest.getInstance("SHA-1"); } catch (NoSuchAlgorithmException e) { return null; } try { return md.digest(s.toString().getBytes("UTF-8")); } catch(UnsupportedEncodingException e) { return null; } } }