X-Git-Url: https://code.wpia.club/?a=blobdiff_plain;f=src%2Forg%2Fcacert%2Fgigi%2Femail%2FEmailProvider.java;h=3ccac586e24a47ce7794e3d87169a261d781a964;hb=48b552dcb661a6ba039e6b28bea50655667c70f9;hp=ba40bb849cf208bdceef4292efd978a6edda6d29;hpb=12a50b628704757377141d80da9dfc2785d225ed;p=gigi.git

diff --git a/src/org/cacert/gigi/email/EmailProvider.java b/src/org/cacert/gigi/email/EmailProvider.java
index ba40bb84..3ccac586 100644
--- a/src/org/cacert/gigi/email/EmailProvider.java
+++ b/src/org/cacert/gigi/email/EmailProvider.java
@@ -1,13 +1,133 @@
 package org.cacert.gigi.email;
 
+import java.io.BufferedReader;
 import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.PrintWriter;
+import java.net.Socket;
+import java.sql.PreparedStatement;
+import java.sql.SQLException;
+import java.util.LinkedList;
+import java.util.Properties;
+import java.util.regex.Pattern;
+
+import org.cacert.gigi.database.DatabaseConnection;
 
 public abstract class EmailProvider {
-	public abstract void sendmail(String to, String subject, String message,
-			String from, String replyto, String toname, String fromname,
-			String errorsto, boolean extra) throws IOException;
-	private static EmailProvider instance = new Sendmail();
-	public static EmailProvider getInstance() {
-		return instance;
-	}
+
+    public abstract void sendmail(String to, String subject, String message, String from, String replyto, String toname, String fromname, String errorsto, boolean extra) throws IOException;
+
+    private static EmailProvider instance;
+
+    public static EmailProvider getInstance() {
+        return instance;
+    }
+
+    protected static void setInstance(EmailProvider instance) {
+        EmailProvider.instance = instance;
+    }
+
+    public static void init(Properties conf) {
+        try {
+            Class<?> c = Class.forName(conf.getProperty("emailProvider"));
+            instance = (EmailProvider) c.getDeclaredConstructor(Properties.class).newInstance(conf);
+        } catch (ReflectiveOperationException e) {
+            e.printStackTrace();
+        }
+    }
+
+    public static final String OK = "OK";
+
+    public static final String FAIL = "FAIL";
+
+    public static final Pattern MAIL = Pattern.compile("^([a-zA-Z0-9])+([a-zA-Z0-9\\+\\._-])*@([a-zA-Z0-9_-])+([a-zA-Z0-9\\._-]+)+$");
+
+    public String checkEmailServer(int forUid, String address) throws IOException {
+        if (MAIL.matcher(address).matches()) {
+            String[] parts = address.split("@", 2);
+            String domain = parts[1];
+
+            LinkedList<String> mxhosts = getMxHosts(domain);
+
+            for (String host : mxhosts) {
+                try (Socket s = new Socket(host, 25); BufferedReader br = new BufferedReader(new InputStreamReader(s.getInputStream())); PrintWriter pw = new PrintWriter(s.getOutputStream())) {
+                    String line;
+                    while ((line = br.readLine()) != null && line.startsWith("220-")) {
+                    }
+                    if (line == null || !line.startsWith("220")) {
+                        continue;
+                    }
+
+                    pw.print("HELO www.cacert.org\r\n");
+                    pw.flush();
+
+                    while ((line = br.readLine()) != null && line.startsWith("220")) {
+                    }
+
+                    if (line == null || !line.startsWith("250")) {
+                        continue;
+                    }
+                    pw.print("MAIL FROM: <returns@cacert.org>\r\n");
+                    pw.flush();
+
+                    line = br.readLine();
+
+                    if (line == null || !line.startsWith("250")) {
+                        continue;
+                    }
+                    pw.print("RCPT TO: <" + address + ">\r\n");
+                    pw.flush();
+
+                    line = br.readLine();
+                    pw.print("QUIT\r\n");
+                    pw.flush();
+
+                    try {
+                        PreparedStatement statmt = DatabaseConnection.getInstance().prepare("insert into `pinglog` set `when`=NOW(), `email`=?, `result`=?, `uid`=?");
+                        statmt.setString(1, address);
+                        statmt.setString(2, line);
+                        statmt.setInt(3, forUid);
+                        statmt.execute();
+                    } catch (SQLException e) {
+                        e.printStackTrace();
+                    }
+
+                    if (line == null || !line.startsWith("250")) {
+                        return line;
+                    } else {
+                        return OK;
+                    }
+                }
+
+            }
+        }
+        try {
+            PreparedStatement statmt = DatabaseConnection.getInstance().prepare("insert into `pinglog` set `when`=NOW(), `email`=?, `result`=?, `uid`=?");
+            statmt.setString(1, address);
+            statmt.setString(2, "Failed to make a connection to the mail server");
+            statmt.setInt(3, forUid);
+            statmt.execute();
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+        return FAIL;
+    }
+
+    private static LinkedList<String> getMxHosts(String domain) throws IOException {
+        LinkedList<String> mxhosts = new LinkedList<String>();
+        Process dig = Runtime.getRuntime().exec(new String[] {
+                "dig", "+short", "MX", domain
+        });
+        try (BufferedReader br = new BufferedReader(new InputStreamReader(dig.getInputStream()))) {
+            String line;
+            while ((line = br.readLine()) != null) {
+                String[] mxparts = line.split(" ", 2);
+                if (mxparts.length != 2) {
+                    continue;
+                }
+                mxhosts.add(mxparts[1].substring(0, mxparts[1].length() - 1));
+            }
+        }
+        return mxhosts;
+    }
 }