Allow re-enrollment to the same domain in case of policy data loss.

chrome/browser/chromeos/login/authenticator.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/chromeos/login/authenticator.h"
 
 #include <string>
 #include <vector>
 
 #include "base/logging.h"
@@ skipping 22 matching lines @@
   if (parts.size() != 2U)
     NOTREACHED() << "expecting exactly one @, but got " << parts.size();
   else if (parts[1] == kGmailDomain)  // only strip '.' for gmail accounts.
     RemoveChars(parts[0], ".", &parts[0]);
   std::string new_email = StringToLowerASCII(JoinString(parts, at));
   VLOG(1) << "Canonicalized " << email_address << " to " << new_email;
   return new_email;
 }
 
 // static
+std::string Authenticator::CanonicalizeDomain(const std::string& domain) {
+  // Canonicalization of domain names means lower-casing them. Make sure to
+  // update this function in sync with Canonicalize if this ever changes.
+  return StringToLowerASCII(domain);
+}
+
+// static
 std::string Authenticator::Sanitize(const std::string& email_address) {
   std::string sanitized(email_address);
 
   // Apply a default domain if necessary.
   if (sanitized.find('@') == std::string::npos) {
     sanitized += '@';
     sanitized += kGmailDomain;
   }
 
   return sanitized;
 }
 
+// static
+std::string Authenticator::ExtractDomainName(const std::string& email_address) {
+  // First canonicalize which will also verify we have proper domain part.
+  std::string email = Canonicalize(email_address);
+  size_t separator_pos = email.find('@');
+  if (separator_pos != email.npos && separator_pos < email.length() - 1)
+    return email.substr(separator_pos + 1);
+  else
+    NOTREACHED() << "Not a proper email address: " << email;
+  return std::string();
+}
+
 }  // namespace chromeos