chg: Be more liberal in what email addresses are accepted.

[gigi.git] / src / org / cacert / gigi / email / EmailProvider.java

diff --git a/src/org/cacert/gigi/email/EmailProvider.java b/src/org/cacert/gigi/email/EmailProvider.java
index e2c4d5d63cb296b615fea0f9ee44093f4cfcca01..6834d461d0060c850438491de3c5246995c4f2a9 100644 (file)
--- a/src/org/cacert/gigi/email/EmailProvider.java
+++ b/src/org/cacert/gigi/email/EmailProvider.java
@@ -22,10 +22,11 @@ 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;
+    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;
 
@@ -39,7 +40,13 @@ public abstract class EmailProvider {
     }
 
     protected final void sendSigned(String contents, PrintWriter output) throws IOException, GeneralSecurityException {
-        SMIME.smime(contents, k, c, output);
+        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() {
@@ -65,10 +72,20 @@ public abstract class EmailProvider {
 
     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\\._-]+)+$");
+    private static final String MAIL_P_RFC_WORD = "[A-Za-z0-9\\+\\.!#$%&'*/=?^_`|~{}-]+";
+
+    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 (MAIL.matcher(address).matches()) {
+        if (isValidMailAddress(address)) {
             String[] parts = address.split("@", 2);
             String domain = parts[1];
 
@@ -87,12 +104,13 @@ public abstract class EmailProvider {
                 } else {
                     return "Strange MX records.";
                 }
-                try (Socket s = new Socket(host, 25); BufferedReader br0 = new BufferedReader(new InputStreamReader(s.getInputStream(), "UTF-8"));//
+                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)) {
+                    if ( !SendMail.readSMTPResponse(br, 220)) {
                         continue;
                     }
 
@@ -113,7 +131,7 @@ public abstract class EmailProvider {
                     if (starttls) {
                         pw.print("STARTTLS\r\n");
                         pw.flush();
-                        if ( !Sendmail.readSMTPResponse(br, 220)) {
+                        if ( !SendMail.readSMTPResponse(br, 220)) {
                             continue;
                         }
                         Socket s1 = ((SSLSocketFactory) SSLSocketFactory.getDefault()).createSocket(s, host, 25, true);
@@ -121,7 +139,7 @@ public abstract class EmailProvider {
                         pw = new PrintWriter(new OutputStreamWriter(s1.getOutputStream(), "UTF-8"));
                         pw.print("EHLO www.cacert.org\r\n");
                         pw.flush();
-                        if ( !Sendmail.readSMTPResponse(br, 250)) {
+                        if ( !SendMail.readSMTPResponse(br, 250)) {
                             continue;
                         }
                     }
@@ -129,18 +147,18 @@ public abstract class EmailProvider {
                     pw.print("MAIL FROM: <returns@cacert.org>\r\n");
                     pw.flush();
 
-                    if ( !Sendmail.readSMTPResponse(br, 250)) {
+                    if ( !SendMail.readSMTPResponse(br, 250)) {
                         continue;
                     }
                     pw.print("RCPT TO: <" + address + ">\r\n");
                     pw.flush();
 
-                    if ( !Sendmail.readSMTPResponse(br, 250)) {
+                    if ( !SendMail.readSMTPResponse(br, 250)) {
                         continue;
                     }
                     pw.print("QUIT\r\n");
                     pw.flush();
-                    if ( !Sendmail.readSMTPResponse(br, 221)) {
+                    if ( !SendMail.readSMTPResponse(br, 221)) {
                         continue;
                     }
 
@@ -183,4 +201,27 @@ public abstract class EmailProvider {
         });
     }
 
+    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;
+    }
+
 }