X-Git-Url: https://code.wpia.club/?p=gigi.git;a=blobdiff_plain;f=src%2Forg%2Fcacert%2Fgigi%2Femail%2FEmailProvider.java;h=6834d461d0060c850438491de3c5246995c4f2a9;hp=ba40bb849cf208bdceef4292efd978a6edda6d29;hb=680b03f826182ea5d743b9fa6bc4b5b16e001e10;hpb=12a50b628704757377141d80da9dfc2785d225ed

diff --git a/src/org/cacert/gigi/email/EmailProvider.java b/src/org/cacert/gigi/email/EmailProvider.java
index ba40bb84..6834d461 100644
--- a/src/org/cacert/gigi/email/EmailProvider.java
+++ b/src/org/cacert/gigi/email/EmailProvider.java
@@ -1,13 +1,227 @@
 package org.cacert.gigi.email;
 
+import java.io.BufferedReader;
 import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.OutputStreamWriter;
+import java.io.PrintWriter;
+import java.net.Socket;
+import java.security.GeneralSecurityException;
+import java.security.Key;
+import java.security.PrivateKey;
+import java.security.cert.Certificate;
+import java.security.cert.X509Certificate;
+import java.util.Arrays;
+import java.util.Comparator;
+import java.util.Properties;
+import java.util.regex.Pattern;
+
+import javax.naming.NamingException;
+import javax.net.ssl.SSLSocketFactory;
+
+import org.cacert.gigi.crypto.SMIME;
+import org.cacert.gigi.database.GigiPreparedStatement;
+import org.cacert.gigi.util.DNSUtil;
+import org.cacert.gigi.util.DomainAssessment;
 
 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 replyto, String toname, String fromname, String errorsto, boolean extra) throws IOException;
+
+    private static EmailProvider instance;
+
+    private X509Certificate c;
+
+    private PrivateKey k;
+
+    protected void init(Certificate c, Key k) {
+        this.c = (X509Certificate) c;
+        this.k = (PrivateKey) k;
+    }
+
+    protected final void sendSigned(String contents, PrintWriter output) throws IOException, GeneralSecurityException {
+        if (k == null || c == null) {
+            output.println("Content-Transfer-Encoding: base64");
+            output.println();
+            output.print(contents);
+        } else {
+            SMIME.smime(contents, k, c, output);
+        }
+    }
+
+    public static EmailProvider getInstance() {
+        return instance;
+    }
+
+    protected static void setInstance(EmailProvider instance) {
+        EmailProvider.instance = instance;
+    }
+
+    public static void initSystem(Properties conf, Certificate cert, Key pk) {
+        try {
+            Class<?> c = Class.forName(conf.getProperty("emailProvider"));
+            EmailProvider ep = (EmailProvider) c.getDeclaredConstructor(Properties.class).newInstance(conf);
+            ep.init(cert, pk);
+            instance = ep;
+        } catch (ReflectiveOperationException e) {
+            e.printStackTrace();
+        }
+    }
+
+    public static final String OK = "OK";
+
+    public static final String FAIL = "FAIL";
+
+    private static final String MAIL_P_RFC_WORD = "[A-Za-z0-9\\+\\.!#$%&'*/=?^_`|~{}-]+";
+
+    private static final String MAIL_P_RFC_LOCAL = MAIL_P_RFC_WORD + "(?:\\." + MAIL_P_RFC_WORD + ")*";
+
+    private static final String MAIL_P_RFC_LABEL = "(?!(?!xn)..--|-)(?:[A-Za-z0-9-]+)(?<!-)";
+
+    private static final String MAIL_P_RFC_ADDRESS = MAIL_P_RFC_LOCAL + "@(?:" + MAIL_P_RFC_LABEL + "\\.)+" + MAIL_P_RFC_LABEL + "\\.?";
+
+    private static final Pattern MAIL_LOCAL = Pattern.compile("^" + MAIL_P_RFC_LOCAL + "$");
+
+    private static final Pattern MAIL_ADDRESS = Pattern.compile("^" + MAIL_P_RFC_ADDRESS + "$");
+
+    public String checkEmailServer(int forUid, String address) throws IOException {
+        if (isValidMailAddress(address)) {
+            String[] parts = address.split("@", 2);
+            String domain = parts[1];
+
+            String[] mxhosts;
+            try {
+                mxhosts = DNSUtil.getMXEntries(domain);
+            } catch (NamingException e1) {
+                return "MX lookup for your hostname failed.";
+            }
+            sortMX(mxhosts);
+
+            for (String host : mxhosts) {
+                host = host.split(" ", 2)[1];
+                if (host.endsWith(".")) {
+                    host = host.substring(0, host.length() - 1);
+                } else {
+                    return "Strange MX records.";
+                }
+                try (Socket s = new Socket(host, 25);
+                        BufferedReader br0 = new BufferedReader(new InputStreamReader(s.getInputStream(), "UTF-8"));//
+                        PrintWriter pw0 = new PrintWriter(new OutputStreamWriter(s.getOutputStream(), "UTF-8"))) {
+                    BufferedReader br = br0;
+                    PrintWriter pw = pw0;
+                    String line;
+                    if ( !SendMail.readSMTPResponse(br, 220)) {
+                        continue;
+                    }
+
+                    pw.print("EHLO www.cacert.org\r\n");
+                    pw.flush();
+                    boolean starttls = false;
+                    do {
+                        line = br.readLine();
+                        if (line == null) {
+                            break;
+                        }
+                        starttls |= line.substring(4).equals("STARTTLS");
+                    } while (line.startsWith("250-"));
+                    if (line == null || !line.startsWith("250 ")) {
+                        continue;
+                    }
+
+                    if (starttls) {
+                        pw.print("STARTTLS\r\n");
+                        pw.flush();
+                        if ( !SendMail.readSMTPResponse(br, 220)) {
+                            continue;
+                        }
+                        Socket s1 = ((SSLSocketFactory) SSLSocketFactory.getDefault()).createSocket(s, host, 25, true);
+                        br = new BufferedReader(new InputStreamReader(s1.getInputStream(), "UTF-8"));
+                        pw = new PrintWriter(new OutputStreamWriter(s1.getOutputStream(), "UTF-8"));
+                        pw.print("EHLO www.cacert.org\r\n");
+                        pw.flush();
+                        if ( !SendMail.readSMTPResponse(br, 250)) {
+                            continue;
+                        }
+                    }
+
+                    pw.print("MAIL FROM: <returns@cacert.org>\r\n");
+                    pw.flush();
+
+                    if ( !SendMail.readSMTPResponse(br, 250)) {
+                        continue;
+                    }
+                    pw.print("RCPT TO: <" + address + ">\r\n");
+                    pw.flush();
+
+                    if ( !SendMail.readSMTPResponse(br, 250)) {
+                        continue;
+                    }
+                    pw.print("QUIT\r\n");
+                    pw.flush();
+                    if ( !SendMail.readSMTPResponse(br, 221)) {
+                        continue;
+                    }
+
+                    try (GigiPreparedStatement statmt = new GigiPreparedStatement("INSERT INTO `emailPinglog` SET `when`=NOW(), `email`=?, `result`=?, `uid`=?, `type`='fast', `status`=?::`pingState`")) {
+                        statmt.setString(1, address);
+                        statmt.setString(2, line);
+                        statmt.setInt(3, forUid);
+                        statmt.setString(4, "success");
+                        statmt.execute();
+                    }
+
+                    if (line == null || !line.startsWith("250")) {
+                        return line;
+                    } else {
+                        return OK;
+                    }
+                }
+
+            }
+        }
+        try (GigiPreparedStatement statmt = new GigiPreparedStatement("INSERT INTO `emailPinglog` SET `when`=NOW(), `email`=?, `result`=?, `uid`=?, `type`='fast', `status`=?::`pingState`")) {
+            statmt.setString(1, address);
+            statmt.setString(2, "Failed to make a connection to the mail server");
+            statmt.setInt(3, forUid);
+            statmt.setString(4, "failed");
+            statmt.execute();
+        }
+        return FAIL;
+    }
+
+    private static void sortMX(String[] mxhosts) {
+        Arrays.sort(mxhosts, new Comparator<String>() {
+
+            @Override
+            public int compare(String o1, String o2) {
+                int i1 = Integer.parseInt(o1.split(" ")[0]);
+                int i2 = Integer.parseInt(o2.split(" ")[0]);
+                return Integer.compare(i1, i2);
+            }
+        });
+    }
+
+    public static boolean isValidMailAddress(String address) {
+        if ( !MAIL_ADDRESS.matcher(address).matches()) {
+            return false;
+        }
+
+        String[] parts = address.split("@", 2);
+
+        String local = parts[0];
+        String domain = parts[1];
+
+        if ( !MAIL_LOCAL.matcher(local).matches()) {
+            return false;
+        }
+
+        for (String domainPart : domain.split("\\.", -1)) {
+            if ( !DomainAssessment.isValidDomainPart(domainPart)) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
 }