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