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EmailProvider.java
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EmailProvider.java
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package eu.faircode.email;
/*
This file is part of FairEmail.
FairEmail is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
FairEmail is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with FairEmail. If not, see <http://www.gnu.org/licenses/>.
Copyright 2018-2023 by Marcel Bokhorst (M66B)
*/
import static android.system.OsConstants.ECONNREFUSED;
import android.content.Context;
import android.os.Parcel;
import android.os.Parcelable;
import android.system.ErrnoException;
import android.text.TextUtils;
import android.util.Xml;
import androidx.annotation.NonNull;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import org.xmlpull.v1.XmlPullParserFactory;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.ConnectException;
import java.net.HttpURLConnection;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.net.URL;
import java.net.UnknownHostException;
import java.security.cert.Certificate;
import java.security.cert.X509Certificate;
import java.text.Collator;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Comparator;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.Objects;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;
import javax.net.SocketFactory;
import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLSession;
import javax.net.ssl.SSLSocket;
import javax.net.ssl.SSLSocketFactory;
public class EmailProvider implements Parcelable {
public String id;
public String name;
public String description;
public boolean debug;
public boolean enabled;
public boolean alt;
public List<String> domain;
public List<String> mx;
public int order;
public String type;
public int keepalive;
public boolean noop;
public boolean partial;
public boolean raw;
public boolean useip;
public boolean appPassword;
public String maxtls;
public String link;
public Server imap = new Server();
public Server smtp = new Server();
public Server pop;
public OAuth oauth;
public OAuth graph;
public UserType user = UserType.EMAIL;
public String username;
public StringBuilder documentation; // html
enum Discover {ALL, IMAP, SMTP}
enum UserType {LOCAL, EMAIL, VALUE}
private static List<EmailProvider> imported;
private static final int SCAN_TIMEOUT = 10 * 1000; // milliseconds
private static final int ISPDB_TIMEOUT = 10 * 1000; // milliseconds
private static final int MS_TIMEOUT = 10 * 1000; // milliseconds
private static final List<String> PROPRIETARY = Collections.unmodifiableList(Arrays.asList(
"protonmail.ch",
"protonmail.com",
"tutanota.com",
"tutanota.de",
"tutamail.com", // tutanota
"tuta.io", // tutanota
"keemail.me", // tutanota
"ctemplar.com",
"cyberfear.com",
"skiff.com",
"tildamail.com",
"criptext.com",
"onmail.com"
));
private EmailProvider() {
}
EmailProvider(String name) {
this.name = name;
}
static void init(Context context) {
Helper.getSerialExecutor().submit(new Runnable() {
@Override
public void run() {
try {
File file = new File(context.getFilesDir(), "providers.xml");
if (file.exists()) {
try (FileInputStream is = new FileInputStream(file)) {
XmlPullParser parser = Xml.newPullParser();
parser.setInput(is, null);
imported = parseProfiles(parser);
}
}
} catch (Throwable ex) {
Log.e(ex);
}
}
});
}
static void importProfiles(InputStream is, Context context) throws IOException {
File file = new File(context.getFilesDir(), "providers.xml");
try (OutputStream os = new FileOutputStream(file)) {
Helper.copy(is, os);
}
init(context);
}
private void validate() throws UnknownHostException {
if (TextUtils.isEmpty(this.imap.host) || this.imap.port <= 0 ||
TextUtils.isEmpty(this.smtp.host) || this.smtp.port <= 0)
throw new UnknownHostException(this.name + " invalid");
}
static List<String> getDomainNames(Context context) {
List<String> result = new ArrayList<>();
for (String domain : PROPRIETARY)
result.add(domain.replace(".", "\\."));
List<EmailProvider> providers = loadProfiles(context);
for (EmailProvider provider : providers)
if (provider.enabled && provider.domain != null)
for (String domain : provider.domain)
if (!result.contains(domain))
result.add(domain);
return result;
}
private static List<EmailProvider> loadProfiles(Context context) {
List<EmailProvider> result = null;
try {
result = parseProfiles(context.getResources().getXml(R.xml.providers));
} catch (Throwable ex) {
Log.e(ex);
}
if (imported != null)
result.addAll(imported);
final Collator collator = Collator.getInstance(Locale.getDefault());
collator.setStrength(Collator.SECONDARY); // Case insensitive, process accents etc
Collections.sort(result, new Comparator<EmailProvider>() {
@Override
public int compare(EmailProvider p1, EmailProvider p2) {
int o = Integer.compare(p1.order, p2.order);
if (o == 0)
return collator.compare(p1.name, p2.name);
else
return o;
}
});
return result;
}
private static List<EmailProvider> parseProfiles(XmlPullParser xml) {
List<EmailProvider> result = null;
String lang = Locale.getDefault().getLanguage();
try {
EmailProvider provider = null;
int eventType = xml.getEventType();
while (eventType != XmlPullParser.END_DOCUMENT) {
if (eventType == XmlPullParser.START_TAG) {
String name = xml.getName();
if ("providers".equals(name))
result = new ArrayList<>();
else if ("provider".equals(name)) {
provider = new EmailProvider();
provider.id = xml.getAttributeValue(null, "id");
provider.name = xml.getAttributeValue(null, "name");
provider.description = xml.getAttributeValue(null, "description");
if (provider.description == null)
provider.description = provider.name;
provider.debug = getAttributeBooleanValue(xml, "debug", false);
provider.enabled = getAttributeBooleanValue(xml, "enabled", true);
provider.alt = getAttributeBooleanValue(xml, "alt", false);
String domain = xml.getAttributeValue(null, "domain");
if (domain != null)
provider.domain = Arrays.asList(domain.split(","));
String mx = xml.getAttributeValue(null, "mx");
if (mx != null)
provider.mx = Arrays.asList(mx.split(","));
provider.order = getAttributeIntValue(xml, "order", Integer.MAX_VALUE);
provider.keepalive = getAttributeIntValue(xml, "keepalive", 0);
provider.noop = getAttributeBooleanValue(xml, "noop", false);
provider.partial = getAttributeBooleanValue(xml, "partial", true);
provider.raw = getAttributeBooleanValue(xml, "raw", false);
provider.useip = getAttributeBooleanValue(xml, "useip", true);
provider.appPassword = getAttributeBooleanValue(xml, "appPassword", false);
provider.maxtls = xml.getAttributeValue(null, "maxtls");
provider.link = xml.getAttributeValue(null, "link");
String documentation = xml.getAttributeValue(null, "documentation." + lang);
if (documentation == null)
documentation = xml.getAttributeValue(null, "documentation");
if (documentation != null)
provider.documentation = new StringBuilder(documentation);
provider.type = xml.getAttributeValue(null, "type");
String user = xml.getAttributeValue(null, "user");
if ("local".equals(user))
provider.user = UserType.LOCAL;
else if ("email".equals(user))
provider.user = UserType.EMAIL;
else {
if (!TextUtils.isEmpty(user)) {
provider.user = UserType.VALUE;
provider.username = user;
}
}
} else if ("imap".equals(name)) {
provider.imap.score = 100;
provider.imap.host = xml.getAttributeValue(null, "host");
provider.imap.port = getAttributeIntValue(xml, "port", 0);
provider.imap.starttls = getAttributeBooleanValue(xml, "starttls", false);
} else if ("smtp".equals(name)) {
provider.smtp.score = 100;
provider.smtp.host = xml.getAttributeValue(null, "host");
provider.smtp.port = getAttributeIntValue(xml, "port", 0);
provider.smtp.starttls = getAttributeBooleanValue(xml, "starttls", false);
} else if ("pop".equals(name)) {
provider.pop = new Server();
provider.pop.host = xml.getAttributeValue(null, "host");
provider.pop.port = getAttributeIntValue(xml, "port", 0);
provider.pop.starttls = getAttributeBooleanValue(xml, "starttls", false);
} else if ("oauth".equals(name)) {
provider.oauth = new OAuth();
provider.oauth.enabled = getAttributeBooleanValue(xml, "enabled", false);
provider.oauth.askAccount = getAttributeBooleanValue(xml, "askAccount", false);
provider.oauth.clientId = xml.getAttributeValue(null, "clientId");
provider.oauth.clientSecret = xml.getAttributeValue(null, "clientSecret");
provider.oauth.scopes = xml.getAttributeValue(null, "scopes").split(",");
provider.oauth.authorizationEndpoint = xml.getAttributeValue(null, "authorizationEndpoint");
provider.oauth.tokenEndpoint = xml.getAttributeValue(null, "tokenEndpoint");
provider.oauth.tokenScopes = getAttributeBooleanValue(xml, "tokenScopes", false);
provider.oauth.redirectUri = xml.getAttributeValue(null, "redirectUri");
provider.oauth.privacy = xml.getAttributeValue(null, "privacy");
provider.oauth.prompt = xml.getAttributeValue(null, "prompt");
} else if ("graph".equals(name)) {
provider.graph = new OAuth();
provider.graph.enabled = getAttributeBooleanValue(xml, "enabled", false);
provider.graph.askAccount = getAttributeBooleanValue(xml, "askAccount", false);
provider.graph.clientId = xml.getAttributeValue(null, "clientId");
provider.graph.clientSecret = xml.getAttributeValue(null, "clientSecret");
provider.graph.scopes = xml.getAttributeValue(null, "scopes").split(",");
provider.graph.authorizationEndpoint = xml.getAttributeValue(null, "authorizationEndpoint");
provider.graph.tokenEndpoint = xml.getAttributeValue(null, "tokenEndpoint");
provider.graph.tokenScopes = getAttributeBooleanValue(xml, "tokenScopes", false);
provider.graph.redirectUri = xml.getAttributeValue(null, "redirectUri");
provider.graph.privacy = xml.getAttributeValue(null, "privacy");
provider.graph.prompt = xml.getAttributeValue(null, "prompt");
} else if ("parameter".equals(name)) {
if (provider.oauth.parameters == null)
provider.oauth.parameters = new LinkedHashMap<>();
provider.oauth.parameters.put(
xml.getAttributeValue(null, "key"),
xml.getAttributeValue(null, "value"));
} else
throw new IllegalAccessException(name);
} else if (eventType == XmlPullParser.END_TAG) {
if ("provider".equals(xml.getName())) {
result.add(provider);
provider = null;
}
}
eventType = xml.next();
}
} catch (Throwable ex) {
Log.e(ex);
}
return result;
}
private static boolean getAttributeBooleanValue(XmlPullParser parser, String name, boolean defaultValue) {
String value = parser.getAttributeValue(null, name);
return (value == null ? defaultValue : Boolean.parseBoolean(value));
}
private static int getAttributeIntValue(XmlPullParser parser, String name, int defaultValue) {
String value = parser.getAttributeValue(null, name);
return (value == null ? defaultValue : Integer.parseInt(value));
}
static EmailProvider getProvider(Context context, String id) throws FileNotFoundException {
if (id != null)
for (EmailProvider provider : loadProfiles(context))
if (id.equals(provider.id))
return provider;
throw new FileNotFoundException("provider id=" + id);
}
static EmailProvider getProviderByHost(Context context, @NonNull String host) {
for (EmailProvider provider : loadProfiles(context)) {
if (provider.imap != null && host.equals(provider.imap.host))
return provider;
if (provider.pop != null && host.equals(provider.pop.host))
return provider;
if (provider.smtp != null && host.equals(provider.smtp.host))
return provider;
}
return null;
}
// For user interface
static List<EmailProvider> getProviders(Context context) {
return getProviders(context, false);
}
static List<EmailProvider> getProviders(Context context, boolean debug) {
List<EmailProvider> result = new ArrayList<>();
for (EmailProvider provider : loadProfiles(context))
if (provider.enabled || (provider.debug && debug))
result.add(provider);
return result;
}
@NonNull
static List<EmailProvider> fromDomain(Context context, String domain, Discover discover) throws IOException {
return fromEmail(context, domain, discover,
new IDiscovery() {
@Override
public void onStatus(String status) {
// Do nothing
}
});
}
@NonNull
static List<EmailProvider> fromEmail(Context context, String _email, Discover discover, IDiscovery intf) throws IOException {
int at = _email.indexOf('@');
String domain = (at < 0 ? _email : _email.substring(at + 1));
String email = (at < 0 ? "someone@" + domain : _email);
if (TextUtils.isEmpty(domain))
throw new UnknownHostException(context.getString(R.string.title_setup_no_settings, domain));
if (PROPRIETARY.contains(domain))
throw new IllegalArgumentException(context.getString(R.string.title_no_standard));
List<EmailProvider> providers = loadProfiles(context);
for (EmailProvider provider : providers)
if (provider.enabled && provider.domain != null)
for (String d : provider.domain)
if (domain.toLowerCase(Locale.ROOT).matches(d)) {
EntityLog.log(context, "Provider from domain=" + domain + " (" + d + ")");
return Arrays.asList(provider);
}
try {
intf.onStatus("NS " + domain);
DnsHelper.DnsRecord[] ns = DnsHelper.lookup(context, domain, "ns");
for (DnsHelper.DnsRecord record : ns)
for (EmailProvider provider : providers)
if (provider.mx != null)
for (String mx : provider.mx)
if (record.response.matches(mx))
return Arrays.asList(provider);
} catch (Throwable ex) {
Log.w(ex);
}
List<EmailProvider> candidates =
new ArrayList<>(_fromDomain(context, domain.toLowerCase(Locale.ROOT), email, discover, intf));
if (false) // Unsafe: the password could be sent to an unrelated email server
try {
InetAddress iaddr = InetAddress.getByName(domain.toLowerCase(Locale.ROOT));
List<String> commonNames =
ConnectionHelper.getCommonNames(context, domain.toLowerCase(Locale.ROOT), 443, SCAN_TIMEOUT);
EntityLog.log(context, "Website common names=" + TextUtils.join(",", commonNames));
for (String commonName : commonNames) {
String altName = commonName;
if (altName.startsWith("*.")) {
altName = altName.substring(2);
if (commonNames.contains(altName))
continue;
}
if (!altName.equalsIgnoreCase(domain))
try {
InetAddress ialt = InetAddress.getByName(altName);
if (!ialt.equals(iaddr)) {
EntityLog.log(context, "Using website common name=" + altName);
candidates.addAll(_fromDomain(context, altName.toLowerCase(Locale.ROOT), email, discover, intf));
}
} catch (Throwable ex) {
Log.w(ex);
}
}
} catch (Throwable ex) {
Log.w(ex);
}
try {
List<DnsHelper.DnsRecord> records = new ArrayList<>();
try {
intf.onStatus("MX " + domain);
DnsHelper.DnsRecord[] mx = DnsHelper.lookup(context, domain, "mx");
if (mx.length > 0)
records.add(mx[0]);
} catch (Throwable ex) {
Log.w(ex);
}
for (DnsHelper.DnsRecord record : records)
if (!TextUtils.isEmpty(record.response)) {
String target = record.response.toLowerCase(Locale.ROOT);
EntityLog.log(context, "MX target=" + target);
for (EmailProvider provider : providers) {
if (provider.enabled && provider.mx != null)
for (String mx : provider.mx)
if (target.matches(mx)) {
EntityLog.log(context, "From MX domain=" + domain);
candidates.add(provider);
break;
}
String mxroot = UriHelper.getRootDomain(context, target);
String proot = UriHelper.getRootDomain(context, provider.imap.host);
if (mxroot != null && mxroot.equalsIgnoreCase(proot)) {
EntityLog.log(context, "From MX host=" + provider.imap.host);
candidates.add(provider);
break;
}
}
while (candidates.size() == 0 && target.indexOf('.') > 0) {
candidates.addAll(_fromDomain(context, target, email, discover, intf));
int dot = target.indexOf('.');
target = target.substring(dot + 1);
if (UriHelper.isTld(context, target))
break;
}
}
for (DnsHelper.DnsRecord record : records)
try {
String target = record.response.toLowerCase(Locale.ROOT);
InetAddress.getByName(target);
EmailProvider mx1 = new EmailProvider(domain);
mx1.imap.score = 0;
mx1.imap.host = target;
mx1.imap.port = 993;
mx1.imap.starttls = false;
mx1.smtp.score = 0;
mx1.smtp.host = target;
mx1.smtp.port = 587;
mx1.smtp.starttls = true;
candidates.add(mx1);
EmailProvider mx2 = new EmailProvider(domain);
mx2.imap.score = 0;
mx2.imap.host = target;
mx2.imap.port = 993;
mx2.imap.starttls = false;
mx2.smtp.score = 0;
mx2.smtp.host = target;
mx2.smtp.port = 465;
mx2.smtp.starttls = false;
candidates.add(mx2);
break;
} catch (UnknownHostException ex) {
Log.w(ex);
}
} catch (Throwable ex) {
Log.w(ex);
}
if (candidates.size() == 0)
throw new UnknownHostException(context.getString(R.string.title_setup_no_settings, domain));
for (EmailProvider candidate : candidates) {
// Always prefer built-in profiles
// - ISPDB is not always correct
// - documentation links
for (EmailProvider provider : providers)
if (provider.enabled &&
provider.imap.host.equals(candidate.imap.host) ||
provider.smtp.host.equals(candidate.smtp.host)) {
EntityLog.log(context, "Replacing auto config host by profile=" + provider.name);
return Arrays.asList(provider);
} else if (provider.enabled && provider.mx != null)
for (String mx : provider.mx)
if ((candidate.imap.host != null && candidate.imap.host.matches(mx)) ||
(candidate.smtp.host != null && candidate.smtp.host.matches(mx))) {
EntityLog.log(context, "Replacing auto config MC by profile=" + provider.name);
return Arrays.asList(provider);
}
// https://help.dreamhost.com/hc/en-us/articles/214918038-Email-client-configuration-overview
if (candidate.imap.host != null &&
candidate.imap.host.endsWith(".dreamhost.com"))
candidate.imap.host = "imap.dreamhost.com";
if (candidate.smtp.host != null &&
candidate.smtp.host.endsWith(".dreamhost.com"))
candidate.smtp.host = "smtp.dreamhost.com";
// https://docs.aws.amazon.com/workmail/latest/userguide/using_IMAP_client.html
if (candidate.imap.host != null &&
candidate.imap.host.endsWith(".awsapps.com"))
candidate.partial = false;
}
// Sort by score
Collections.sort(candidates, new Comparator<EmailProvider>() {
@Override
public int compare(EmailProvider p1, EmailProvider p2) {
return -Integer.compare(p1.getScore(email), p2.getScore(email));
}
});
// Log candidates
for (EmailProvider candidate : candidates)
EntityLog.log(context, "Candidate" +
" score=" + candidate.getScore(email) +
" imap=" + candidate.imap +
" smtp=" + candidate.smtp +
" user=" + candidate.username);
// Remove duplicates
List<EmailProvider> result = new ArrayList<>();
for (EmailProvider candidate : candidates)
if (!result.contains(candidate))
result.add(candidate);
Log.i("Candidates=" + result.size());
return result;
}
@NonNull
private static List<EmailProvider> _fromDomain(Context context, String domain, String email, Discover discover, IDiscovery intf) {
List<EmailProvider> result = new ArrayList<>();
try {
// Assume the provider knows best
Log.i("Provider from DNS domain=" + domain);
result.add(fromDNS(context, domain, discover, intf));
} catch (Throwable ex) {
Log.w(ex);
}
try {
// Check ISPDB
Log.i("Provider from ISPDB domain=" + domain);
result.add(fromISPDB(context, domain, email, intf));
} catch (Throwable ex) {
Log.w(ex);
}
try {
// Check Microsoft auto discovery
Log.i("Provider from MS domain=" + domain);
result.add(fromMSAutodiscovery(context, domain, email, intf));
} catch (Throwable ex) {
Log.w(ex);
}
try {
// Scan ports
Log.i("Provider from scan domain=" + domain);
result.add(fromScan(context, domain, discover, intf));
} catch (Throwable ex) {
Log.w(ex);
}
return result;
}
@NonNull
private static EmailProvider fromISPDB(Context context, String domain, String email, IDiscovery intf) throws Throwable {
// https://wiki.mozilla.org/Thunderbird:Autoconfiguration
for (String link : Misc.getISPDBUrls(context, domain, email))
try {
URL url = new URL(link);
return getISPDB(context, domain, url, true, intf);
} catch (Throwable ex) {
Log.i(ex);
}
URL url = new URL("https://autoconfig.thunderbird.net/v1.1/" + domain);
return getISPDB(context, domain, url, false, intf);
}
@NonNull
private static EmailProvider getISPDB(Context context, String domain, URL url, boolean unsafe, IDiscovery intf) throws IOException, XmlPullParserException {
EmailProvider provider = new EmailProvider(domain);
HttpURLConnection request = null;
try {
Log.i("Fetching " + url);
intf.onStatus("ISPDB " + url);
request = (HttpURLConnection) url.openConnection();
request.setRequestMethod("GET");
request.setReadTimeout(ISPDB_TIMEOUT);
request.setConnectTimeout(ISPDB_TIMEOUT);
request.setDoInput(true);
ConnectionHelper.setUserAgent(context, request);
if (unsafe && request instanceof HttpsURLConnection) {
((HttpsURLConnection) request).setHostnameVerifier(new HostnameVerifier() {
@Override
public boolean verify(String hostname, SSLSession session) {
return true;
}
});
}
request.connect();
int status = request.getResponseCode();
if (status != HttpURLConnection.HTTP_OK)
throw new FileNotFoundException("Error " + status + ": " + request.getResponseMessage());
// https://developer.android.com/reference/org/xmlpull/v1/XmlPullParser
XmlPullParserFactory factory = XmlPullParserFactory.newInstance();
XmlPullParser xml = factory.newPullParser();
xml.setInput(new InputStreamReader(request.getInputStream()));
EntityLog.log(context, "Parsing " + url);
boolean imap = false;
boolean smtp = false;
String href = null;
String title = null;
int eventType = xml.getEventType();
while (eventType != XmlPullParser.END_DOCUMENT) {
if (eventType == XmlPullParser.START_TAG) {
String name = xml.getName();
if ("displayShortName".equals(name)) {
// <displayShortName>GMail</displayShortName>
eventType = xml.next();
if (eventType == XmlPullParser.TEXT) {
String display = xml.getText();
Log.i("Name=" + display);
provider.name = display;
}
continue;
} else if ("incomingServer".equals(name)) {
// <incomingServer type="imap">
// <hostname>imap.gmail.com</hostname>
// <port>993</port>
// <socketType>SSL</socketType>
// <username>%EMAILADDRESS%</username>
// <authentication>OAuth2</authentication>
// <authentication>password-cleartext</authentication>
// </incomingServer>
imap = "imap".equals(xml.getAttributeValue(null, "type"));
} else if ("outgoingServer".equals(name)) {
// <outgoingServer type="smtp">
// <hostname>smtp.gmail.com</hostname>
// <port>465</port>
// <socketType>SSL</socketType>
// <username>%EMAILADDRESS%</username>
// <authentication>OAuth2</authentication>
// <authentication>password-cleartext</authentication>
// </outgoingServer>
smtp = "smtp".equals(xml.getAttributeValue(null, "type"));
} else if ("hostname".equals(name)) {
eventType = xml.next();
if (eventType == XmlPullParser.TEXT) {
String host = xml.getText();
Log.i("Host=" + host);
if (imap) {
provider.imap.score = 20;
provider.imap.host = host;
} else if (smtp) {
provider.smtp.score = 20;
provider.smtp.host = host;
}
}
continue;
} else if ("port".equals(name)) {
eventType = xml.next();
if (eventType == XmlPullParser.TEXT) {
String port = xml.getText();
Log.i("Port=" + port);
if (imap) {
provider.imap.port = Integer.parseInt(port);
provider.imap.starttls = (provider.imap.port == 143);
} else if (smtp) {
provider.smtp.port = Integer.parseInt(port);
provider.smtp.starttls = (provider.smtp.port == 587);
}
}
continue;
} else if ("socketType".equals(name)) {
eventType = xml.next();
if (eventType == XmlPullParser.TEXT) {
String socket = xml.getText();
Log.i("Socket=" + socket);
if ("SSL".equals(socket)) {
if (imap)
provider.imap.starttls = false;
else if (smtp)
provider.smtp.starttls = false;
} else if ("STARTTLS".equals(socket)) {
if (imap)
provider.imap.starttls = true;
else if (smtp)
provider.smtp.starttls = true;
} else
Log.w("Unknown socket type=" + socket);
}
continue;
} else if ("username".equals(name)) {
eventType = xml.next();
if (eventType == XmlPullParser.TEXT) {
String username = xml.getText();
Log.i("Username=" + username);
if ("%EMAILADDRESS%".equals(username))
provider.user = UserType.EMAIL;
else if ("%EMAILLOCALPART%".equals(username))
provider.user = UserType.LOCAL;
else {
if (!TextUtils.isEmpty(username)) {
provider.user = UserType.VALUE;
provider.username = username;
}
}
}
continue;
} else if ("enable".equals(name)) {
// <enable visiturl="https://mail.google.com/mail/?ui=2&shva=1#settings/fwdandpop">
// <instruction>You need to enable IMAP access</instruction>
// </enable>
href = xml.getAttributeValue(null, "visiturl");
title = null;
} else if ("documentation".equals(name)) {
// <documentation url="http://mail.google.com/support/bin/answer.py?answer=13273">
// <descr>How to enable IMAP/POP3 in GMail</descr>
// </documentation>
href = xml.getAttributeValue(null, "url");
title = null;
} else if ("instruction".equals(name) || "descr".equals(name)) {
if (href != null) {
eventType = xml.next();
if (eventType == XmlPullParser.TEXT) {
if (title == null)
title = "";
else
title += "<br>";
title += xml.getText();
}
continue;
}
}
} else if (eventType == XmlPullParser.END_TAG) {
String name = xml.getName();
if ("incomingServer".equals(name))
imap = false;
else if ("outgoingServer".equals(name))
smtp = false;
else if ("enable".equals(name) || "documentation".equals(name)) {
if (href != null) {
if (title == null)
title = href;
addDocumentation(provider, href, title);
href = null;
title = null;
}
}
}
eventType = xml.next();
}
provider.validate();
return provider;
} finally {
if (request != null)
request.disconnect();
}
}
@NonNull
private static EmailProvider fromMSAutodiscovery(Context context, String domain, String email, IDiscovery intf) throws UnknownHostException {
// https://learn.microsoft.com/en-us/Exchange/architecture/client-access/autodiscover
// https://github.com/gronke/email-autodiscover/blob/master/mail/autodiscover.xml
// Example: https://mail.de/autodiscover/autodiscover.xml
for (String link : Misc.getMSUrls(context, domain, email))
try {
URL url = new URL(link);
return getMSAutodiscovery(context, domain, url, true, intf);
} catch (Throwable ex) {
Log.i(ex);
}
throw new UnknownHostException(domain);
}
private static EmailProvider getMSAutodiscovery(Context context, String domain, URL url, boolean unsafe, IDiscovery intf) throws IOException, XmlPullParserException {
EmailProvider provider = new EmailProvider(domain);
HttpURLConnection request = null;
try {
Log.i("Fetching " + url);
intf.onStatus("MS " + url);
request = (HttpURLConnection) url.openConnection();
request.setRequestMethod("GET");
request.setReadTimeout(MS_TIMEOUT);
request.setConnectTimeout(MS_TIMEOUT);
request.setDoInput(true);
ConnectionHelper.setUserAgent(context, request);
if (unsafe && request instanceof HttpsURLConnection) {
((HttpsURLConnection) request).setHostnameVerifier(new HostnameVerifier() {
@Override
public boolean verify(String hostname, SSLSession session) {
return true;
}
});
}
request.connect();
int status = request.getResponseCode();
if (status != HttpURLConnection.HTTP_OK)
throw new FileNotFoundException("Error " + status + ": " + request.getResponseMessage());
// https://developer.android.com/reference/org/xmlpull/v1/XmlPullParser
XmlPullParserFactory factory = XmlPullParserFactory.newInstance();
XmlPullParser xml = factory.newPullParser();
xml.setInput(new InputStreamReader(request.getInputStream()));
EntityLog.log(context, "Parsing " + url);
boolean isAccount = false;
boolean isEmail = false;
boolean isSettings = false;
boolean isProtocol = false;
boolean isImap = false;
boolean isSmtp = false;
String host = null;
Integer port = null;
int eventType = xml.getEventType();
while (eventType != XmlPullParser.END_DOCUMENT) {
if (eventType == XmlPullParser.START_TAG) {
String name = xml.getName();
if ("Account".equals(name)) {
// <AccountType>email</AccountType>
isAccount = true;
} else if ("AccountType".equals(name) && isAccount) {
// <AccountType>email</AccountType>
eventType = xml.next();
if (eventType == XmlPullParser.TEXT && "email".equals(xml.getText()))
isEmail = true;
continue;
} else if ("Action".equals(name) && isAccount) {
// <Action>settings</Action>
eventType = xml.next();
if (eventType == XmlPullParser.TEXT && "settings".equals(xml.getText()))
isSettings = true;
continue;
} else if ("Protocol".equals(name) && isAccount) {
// <AccountType>email</AccountType>
isProtocol = true;
} else if (isAccount && isEmail && isSettings && isProtocol) {
if ("Type".equals(name)) {
// <AccountType>email</AccountType>
eventType = xml.next();
if (eventType == XmlPullParser.TEXT) {
String type = xml.getText();
if ("IMAP".equals(type))
isImap = true;
else if ("SMTP".equals(type))
isSmtp = true;
}
continue;
} else if ("Server".equals(name)) {
eventType = xml.next();
if (eventType == XmlPullParser.TEXT)
host = xml.getText();
continue;
} else if ("Port".equals(name)) {
eventType = xml.next();
if (eventType == XmlPullParser.TEXT) {
String p = xml.getText();
if (TextUtils.isDigitsOnly(p))
port = Integer.parseInt(p);
}
continue;
}
}
} else if (eventType == XmlPullParser.END_TAG) {
String name = xml.getName();
if ("Account".equals(name)) {
isAccount = false;
isEmail = false;
isSettings = false;
} else if ("Protocol".equals(name)) {
if (isProtocol && host != null && port != null) {
if (isImap) {
provider.imap.score = 20;
provider.imap.host = host;
provider.imap.port = port;
provider.imap.starttls = (provider.imap.port == 143);
} else if (isSmtp) {
provider.smtp.score = 20;
provider.smtp.host = host;
provider.smtp.port = port;
provider.smtp.starttls = (provider.smtp.port == 587);
}
}
isProtocol = false;
isImap = false;
isSmtp = false;
host = null;
port = null;