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