1package eu.siacs.conversations.utils;
2
3import android.net.Uri;
4
5import java.io.UnsupportedEncodingException;
6import java.net.URLDecoder;
7import java.util.ArrayList;
8import java.util.List;
9import java.util.Locale;
10
11import eu.siacs.conversations.xmpp.jid.InvalidJidException;
12import eu.siacs.conversations.xmpp.jid.Jid;
13
14public class XmppUri {
15
16 protected Uri uri;
17 protected String jid;
18 protected List<Fingerprint> fingerprints = new ArrayList<>();
19 private String body;
20 private String name;
21 private String action;
22 protected boolean safeSource = true;
23
24 public static final String OMEMO_URI_PARAM = "omemo-sid-";
25 public static final String OTR_URI_PARAM = "otr-fingerprint";
26
27 public static final String ACTION_JOIN = "join";
28 public static final String ACTION_MESSAGE = "message";
29
30 public XmppUri(String uri) {
31 try {
32 parse(Uri.parse(uri));
33 } catch (IllegalArgumentException e) {
34 try {
35 jid = Jid.fromString(uri).toBareJid().toString();
36 } catch (InvalidJidException e2) {
37 jid = null;
38 }
39 }
40 }
41
42 public XmppUri(Uri uri) {
43 parse(uri);
44 }
45
46 public XmppUri(Uri uri, boolean safeSource) {
47 this.safeSource = safeSource;
48 parse(uri);
49 }
50
51 public boolean isSafeSource() {
52 return safeSource;
53 }
54
55 protected void parse(Uri uri) {
56 this.uri = uri;
57 String scheme = uri.getScheme();
58 String host = uri.getHost();
59 List<String> segments = uri.getPathSegments();
60 if ("https".equalsIgnoreCase(scheme) && "conversations.im".equalsIgnoreCase(host)) {
61 if (segments.size() >= 2 && segments.get(1).contains("@")) {
62 // sample : https://conversations.im/i/foo@bar.com
63 try {
64 jid = Jid.fromString(segments.get(1)).toString();
65 } catch (Exception e) {
66 jid = null;
67 }
68 } else if (segments.size() >= 3) {
69 // sample : https://conversations.im/i/foo/bar.com
70 jid = segments.get(1) + "@" + segments.get(2);
71 }
72 if (segments.size() > 1 && "j".equalsIgnoreCase(segments.get(0))) {
73 action = ACTION_JOIN;
74 }
75 fingerprints = parseFingerprints(uri.getQuery(),'&');
76 } else if ("xmpp".equalsIgnoreCase(scheme)) {
77 // sample: xmpp:foo@bar.com
78
79 final String query = uri.getQuery();
80
81 if (hasAction(query, ACTION_JOIN)) {
82 this.action = ACTION_JOIN;
83 } else if (hasAction(query, ACTION_MESSAGE)) {
84 this.action = ACTION_MESSAGE;
85 }
86
87 if (uri.getAuthority() != null) {
88 jid = uri.getAuthority();
89 } else {
90 String[] parts = uri.getSchemeSpecificPart().split("\\?");
91 if (parts.length > 0) {
92 jid = parts[0];
93 } else {
94 return;
95 }
96 }
97 this.fingerprints = parseFingerprints(uri.getQuery());
98 this.body = parseParameter("body", uri.getQuery());
99 this.name = parseParameter("name", uri.getQuery());
100 } else if ("imto".equalsIgnoreCase(scheme)) {
101 // sample: imto://xmpp/foo@bar.com
102 try {
103 jid = URLDecoder.decode(uri.getEncodedPath(), "UTF-8").split("/")[1].trim();
104 } catch (final UnsupportedEncodingException ignored) {
105 jid = null;
106 }
107 } else {
108 try {
109 jid = Jid.fromString(uri.toString()).toBareJid().toString();
110 } catch (final InvalidJidException ignored) {
111 jid = null;
112 }
113 }
114 }
115
116 public String toString() {
117 if (uri != null) {
118 return uri.toString();
119 }
120 return "";
121 }
122
123 protected List<Fingerprint> parseFingerprints(String query) {
124 return parseFingerprints(query,';');
125 }
126
127 protected List<Fingerprint> parseFingerprints(String query, char seperator) {
128 List<Fingerprint> fingerprints = new ArrayList<>();
129 String[] pairs = query == null ? new String[0] : query.split(String.valueOf(seperator));
130 for(String pair : pairs) {
131 String[] parts = pair.split("=",2);
132 if (parts.length == 2) {
133 String key = parts[0].toLowerCase(Locale.US);
134 String value = parts[1].toLowerCase(Locale.US);
135 if (OTR_URI_PARAM.equals(key)) {
136 fingerprints.add(new Fingerprint(FingerprintType.OTR,value));
137 }
138 if (key.startsWith(OMEMO_URI_PARAM)) {
139 try {
140 int id = Integer.parseInt(key.substring(OMEMO_URI_PARAM.length()));
141 fingerprints.add(new Fingerprint(FingerprintType.OMEMO,value,id));
142 } catch (Exception e) {
143 //ignoring invalid device id
144 }
145 }
146 }
147 }
148 return fingerprints;
149 }
150
151 protected String parseParameter(String key, String query) {
152 for(String pair : query == null ? new String[0] : query.split(";")) {
153 final String[] parts = pair.split("=",2);
154 if (parts.length == 2 && key.equals(parts[0].toLowerCase(Locale.US))) {
155 try {
156 return URLDecoder.decode(parts[1],"UTF-8");
157 } catch (UnsupportedEncodingException e) {
158 return null;
159 }
160 }
161 }
162 return null;
163 }
164
165 private boolean hasAction(String query, String action) {
166 for(String pair : query == null ? new String[0] : query.split(";")) {
167 final String[] parts = pair.split("=",2);
168 if (parts.length == 1 && parts[0].equals(action)) {
169 return true;
170 }
171 }
172 return false;
173 }
174
175 public boolean isAction(final String action) {
176 if (this.action == null) {
177 return false;
178 }
179
180 return this.action.equals(action);
181 }
182
183 public Jid getJid() {
184 try {
185 return this.jid == null ? null :Jid.fromString(this.jid.toLowerCase());
186 } catch (InvalidJidException e) {
187 return null;
188 }
189 }
190
191 public boolean isJidValid() {
192 try {
193 Jid.fromString(jid);
194 return true;
195 } catch (InvalidJidException e) {
196 return false;
197 }
198 }
199
200 public String getBody() {
201 return body;
202 }
203
204 public String getName() {
205 return name;
206 }
207
208 public List<Fingerprint> getFingerprints() {
209 return this.fingerprints;
210 }
211
212 public boolean hasFingerprints() {
213 return fingerprints.size() > 0;
214 }
215 public enum FingerprintType {
216 OMEMO,
217 OTR
218 }
219
220 public static String getFingerprintUri(String base, List<XmppUri.Fingerprint> fingerprints, char seperator) {
221 StringBuilder builder = new StringBuilder(base);
222 builder.append('?');
223 for(int i = 0; i < fingerprints.size(); ++i) {
224 XmppUri.FingerprintType type = fingerprints.get(i).type;
225 if (type == XmppUri.FingerprintType.OMEMO) {
226 builder.append(XmppUri.OMEMO_URI_PARAM);
227 builder.append(fingerprints.get(i).deviceId);
228 } else if (type == XmppUri.FingerprintType.OTR) {
229 builder.append(XmppUri.OTR_URI_PARAM);
230 }
231 builder.append('=');
232 builder.append(fingerprints.get(i).fingerprint);
233 if (i != fingerprints.size() -1) {
234 builder.append(seperator);
235 }
236 }
237 return builder.toString();
238 }
239
240 public static class Fingerprint {
241 public final FingerprintType type;
242 public final String fingerprint;
243 public final int deviceId;
244
245 public Fingerprint(FingerprintType type, String fingerprint) {
246 this(type, fingerprint, 0);
247 }
248
249 public Fingerprint(FingerprintType type, String fingerprint, int deviceId) {
250 this.type = type;
251 this.fingerprint = fingerprint;
252 this.deviceId = deviceId;
253 }
254
255 @Override
256 public String toString() {
257 return type.toString()+": "+fingerprint+(deviceId != 0 ? " "+String.valueOf(deviceId) : "");
258 }
259 }
260}