1package eu.siacs.conversations.utils;
2
3import android.net.Uri;
4import android.util.Log;
5
6import java.io.UnsupportedEncodingException;
7import java.net.URLDecoder;
8import java.util.ArrayList;
9import java.util.List;
10import java.util.Locale;
11
12import eu.siacs.conversations.Config;
13import rocks.xmpp.addr.Jid;
14
15public class XmppUri {
16
17 protected Uri uri;
18 protected String jid;
19 private List<Fingerprint> fingerprints = new ArrayList<>();
20 private String body;
21 private String name;
22 private String action;
23 private boolean safeSource = true;
24
25 private static final String OMEMO_URI_PARAM = "omemo-sid-";
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.of(uri).asBareJid().toString();
36 } catch (IllegalArgumentException 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(final Uri uri) {
56 if (uri == null) {
57 return;
58 }
59 this.uri = uri;
60 String scheme = uri.getScheme();
61 String host = uri.getHost();
62 List<String> segments = uri.getPathSegments();
63 if ("https".equalsIgnoreCase(scheme) && "conversations.im".equalsIgnoreCase(host)) {
64 if (segments.size() >= 2 && segments.get(1).contains("@")) {
65 // sample : https://conversations.im/i/foo@bar.com
66 try {
67 jid = Jid.of(lameUrlDecode(segments.get(1))).toString();
68 } catch (Exception e) {
69 Log.d(Config.LOGTAG, "parsing failed ", e);
70 jid = null;
71 }
72 } else if (segments.size() >= 3) {
73 // sample : https://conversations.im/i/foo/bar.com
74 jid = segments.get(1) + "@" + segments.get(2);
75 }
76 if (segments.size() > 1 && "j".equalsIgnoreCase(segments.get(0))) {
77 action = ACTION_JOIN;
78 }
79 fingerprints = parseFingerprints(uri.getQuery(), '&');
80 } else if ("xmpp".equalsIgnoreCase(scheme)) {
81 // sample: xmpp:foo@bar.com
82
83 final String query = uri.getQuery();
84
85 if (hasAction(query, ACTION_JOIN)) {
86 this.action = ACTION_JOIN;
87 } else if (hasAction(query, ACTION_MESSAGE)) {
88 this.action = ACTION_MESSAGE;
89 }
90
91 if (uri.getAuthority() != null) {
92 jid = uri.getAuthority();
93 } else {
94 // At this point, it might be safe to assume that any instance of '%' or '#' in the
95 // passed URI is the result of the user input and can safely be (should be?) encoded
96 Uri replaced = Uri.parse(lameUrlEncode(uri.toString()));
97 String[] parts = replaced.getSchemeSpecificPart().split("\\?");
98 if (parts.length > 0) {
99 jid = parts[0];
100 } else {
101 return;
102 }
103 }
104 this.fingerprints = parseFingerprints(uri.getQuery());
105 this.body = parseParameter("body", uri.getQuery());
106 this.name = parseParameter("name", uri.getQuery());
107 } else if ("imto".equalsIgnoreCase(scheme)) {
108 // sample: imto://xmpp/foo@bar.com
109 try {
110 jid = URLDecoder.decode(uri.getEncodedPath(), "UTF-8").split("/")[1].trim();
111 } catch (final UnsupportedEncodingException ignored) {
112 jid = null;
113 }
114 } else {
115 try {
116 jid = Jid.of(uri.toString()).asBareJid().toString();
117 } catch (final IllegalArgumentException ignored) {
118 jid = null;
119 }
120 }
121 }
122
123 public String toString() {
124 if (uri != null) {
125 return uri.toString();
126 }
127 return "";
128 }
129
130 private List<Fingerprint> parseFingerprints(String query) {
131 return parseFingerprints(query, ';');
132 }
133
134 private List<Fingerprint> parseFingerprints(String query, char seperator) {
135 List<Fingerprint> fingerprints = new ArrayList<>();
136 String[] pairs = query == null ? new String[0] : query.split(String.valueOf(seperator));
137 for (String pair : pairs) {
138 String[] parts = pair.split("=", 2);
139 if (parts.length == 2) {
140 String key = parts[0].toLowerCase(Locale.US);
141 String value = parts[1].toLowerCase(Locale.US);
142 if (key.startsWith(OMEMO_URI_PARAM)) {
143 try {
144 int id = Integer.parseInt(key.substring(OMEMO_URI_PARAM.length()));
145 fingerprints.add(new Fingerprint(FingerprintType.OMEMO, value, id));
146 } catch (Exception e) {
147 //ignoring invalid device id
148 }
149 }
150 }
151 }
152 return fingerprints;
153 }
154
155 private String parseParameter(String key, String query) {
156 for (String pair : query == null ? new String[0] : query.split(";")) {
157 final String[] parts = pair.split("=", 2);
158 if (parts.length == 2 && key.equals(parts[0].toLowerCase(Locale.US))) {
159 try {
160 return URLDecoder.decode(parts[1], "UTF-8");
161 } catch (UnsupportedEncodingException e) {
162 return null;
163 }
164 }
165 }
166 return null;
167 }
168
169 private boolean hasAction(String query, String action) {
170 for (String pair : query == null ? new String[0] : query.split(";")) {
171 final String[] parts = pair.split("=", 2);
172 if (parts.length == 1 && parts[0].equals(action)) {
173 return true;
174 }
175 }
176 return false;
177 }
178
179 public boolean isAction(final String action) {
180 return this.action != null && this.action.equals(action);
181
182 }
183
184 public Jid getJid() {
185 try {
186 return this.jid == null ? null : Jid.of(this.jid.toLowerCase());
187 } catch (IllegalArgumentException e) {
188 return null;
189 }
190 }
191
192 public boolean isJidValid() {
193 if (jid == null) {
194 return false;
195 }
196 try {
197 Jid.of(jid);
198 return true;
199 } catch (IllegalArgumentException e) {
200 return false;
201 }
202 }
203
204 public String getBody() {
205 return body;
206 }
207
208 public String getName() {
209 return name;
210 }
211
212 public List<Fingerprint> getFingerprints() {
213 return this.fingerprints;
214 }
215
216 public boolean hasFingerprints() {
217 return fingerprints.size() > 0;
218 }
219
220 public enum FingerprintType {
221 OMEMO
222 }
223
224 public static String getFingerprintUri(String base, List<XmppUri.Fingerprint> fingerprints, char seperator) {
225 StringBuilder builder = new StringBuilder(base);
226 builder.append('?');
227 for (int i = 0; i < fingerprints.size(); ++i) {
228 XmppUri.FingerprintType type = fingerprints.get(i).type;
229 if (type == XmppUri.FingerprintType.OMEMO) {
230 builder.append(XmppUri.OMEMO_URI_PARAM);
231 builder.append(fingerprints.get(i).deviceId);
232 }
233 builder.append('=');
234 builder.append(fingerprints.get(i).fingerprint);
235 if (i != fingerprints.size() - 1) {
236 builder.append(seperator);
237 }
238 }
239 return builder.toString();
240 }
241
242 public static class Fingerprint {
243 public final FingerprintType type;
244 public final String fingerprint;
245 final int deviceId;
246
247 public Fingerprint(FingerprintType type, String fingerprint, int deviceId) {
248 this.type = type;
249 this.fingerprint = fingerprint;
250 this.deviceId = deviceId;
251 }
252
253 @Override
254 public String toString() {
255 return type.toString() + ": " + fingerprint + (deviceId != 0 ? " " + String.valueOf(deviceId) : "");
256 }
257 }
258
259 private static String lameUrlDecode(String url) {
260 return url.replace("%23", "#").replace("%25", "%");
261 }
262
263 public static String lameUrlEncode(String url) {
264 return url.replace("%", "%25").replace("#", "%23");
265 }
266}