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Use website common names for quick setup wizard

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M66B
2021-10-29 12:46:27 +02:00
parent 404ab3160a
commit 95825e3f06
2 changed files with 62 additions and 0 deletions
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34
app/src/main/java/eu/faircode/email/ConnectionHelper.java
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@@ -37,12 +37,21 @@ import com.sun.mail.iap.ConnectionException;
import com.sun.mail.util.FolderClosedIOException;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.security.cert.Certificate;
import java.security.cert.CertificateParsingException;
import java.security.cert.X509Certificate;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Locale;
import java.util.Objects;
import javax.net.SocketFactory;
import javax.net.ssl.SSLSocket;
import javax.net.ssl.SSLSocketFactory;
public class ConnectionHelper {
static final List<String> PREF_NETWORK = Collections.unmodifiableList(Arrays.asList(
"metered", "roaming", "rlah", "require_validated", "vpn_only" // update network state
@@ -472,4 +481,29 @@ public class ConnectionHelper {
return Settings.Global.getInt(context.getContentResolver(),
Settings.Global.AIRPLANE_MODE_ON, 0) != 0;
}
static List<String> getCommonNames(Context context, String domain, int port, int timeout) throws IOException {
List<String> result = new ArrayList<>();
InetSocketAddress address = new InetSocketAddress(domain, port);
SocketFactory factory = SSLSocketFactory.getDefault();
try (SSLSocket sslSocket = (SSLSocket) factory.createSocket()) {
EntityLog.log(context, "Connecting to " + address);
sslSocket.connect(address, timeout);
EntityLog.log(context, "Connected " + address);
sslSocket.setSoTimeout(timeout);
sslSocket.startHandshake();
Certificate[] certs = sslSocket.getSession().getPeerCertificates();
for (Certificate cert : certs)
if (cert instanceof X509Certificate) {
try {
result.addAll(EntityCertificate.getDnsNames((X509Certificate) cert));
} catch (CertificateParsingException ex) {
Log.w(ex);
}
}
}
return result;
}
}