1 files changed, 93 insertions, 0 deletions
diff --git a/gerrit-server/src/main/java/com/google/gerrit/server/mail/SignedTokenEmailTokenVerifier.java b/gerrit-server/src/main/java/com/google/gerrit/server/mail/SignedTokenEmailTokenVerifier.java
new file mode 100644
index 0000000000..4d6eb8ec21
--- /dev/null
+++ b/gerrit-server/src/main/java/com/google/gerrit/server/mail/SignedTokenEmailTokenVerifier.java
@@ -0,0 +1,93 @@
+// Copyright (C) 2012 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.google.gerrit.server.mail;
+
+import com.google.gerrit.reviewdb.client.Account;
+import com.google.gerrit.server.config.AuthConfig;
+import com.google.gwtjsonrpc.server.SignedToken;
+import com.google.gwtjsonrpc.server.ValidToken;
+import com.google.gwtjsonrpc.server.XsrfException;
+import com.google.inject.AbstractModule;
+import com.google.inject.Inject;
+
+import org.eclipse.jgit.util.Base64;
+
+import java.io.UnsupportedEncodingException;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+/** Verifies the token sent by {@link RegisterNewEmailSender}. */
+public class SignedTokenEmailTokenVerifier implements EmailTokenVerifier {
+  private final SignedToken emailRegistrationToken;
+
+  public static class Module extends AbstractModule {
+    @Override
+    protected void configure() {
+      bind(EmailTokenVerifier.class).to(SignedTokenEmailTokenVerifier.class);
+    }
+  }
+
+  @Inject
+  SignedTokenEmailTokenVerifier(AuthConfig config) {
+    emailRegistrationToken = config.getEmailRegistrationToken();
+  }
+
+  public String encode(Account.Id accountId, String emailAddress) {
+    try {
+      String payload = String.format("%s:%s", accountId, emailAddress);
+      byte[] utf8 = payload.getBytes("UTF-8");
+      String base64 = Base64.encodeBytes(utf8);
+      return emailRegistrationToken.newToken(base64);
+    } catch (XsrfException e) {
+      throw new IllegalArgumentException(e);
+    } catch (UnsupportedEncodingException e) {
+      throw new IllegalArgumentException(e);
+    }
+  }
+
+  public ParsedToken decode(String tokenString) throws InvalidTokenException {
+    ValidToken token;
+    try {
+      token = emailRegistrationToken.checkToken(tokenString, null);
+    } catch (XsrfException err) {
+      throw new InvalidTokenException(err);
+    }
+    if (token == null || token.getData() == null || token.getData().isEmpty()) {
+      throw new InvalidTokenException();
+    }
+
+    String payload;
+    try {
+      payload = new String(Base64.decode(token.getData()), "UTF-8");
+    } catch (UnsupportedEncodingException err) {
+      throw new InvalidTokenException(err);
+    }
+
+    Matcher matcher = Pattern.compile("^([0-9]+):(.+@.+)$").matcher(payload);
+    if (!matcher.matches()) {
+      throw new InvalidTokenException();
+    }
+
+    Account.Id id;
+    try {
+      id = Account.Id.parse(matcher.group(1));
+    } catch (IllegalArgumentException err) {
+      throw new InvalidTokenException(err);
+    }
+
+    String newEmail = matcher.group(2);
+    return new ParsedToken(id, newEmail);
+  }
+}