net/base/keygen_handler.h

   1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef NET_BASE_KEYGEN_HANDLER_H_
   6 #define NET_BASE_KEYGEN_HANDLER_H_
   7
   8 #include <string>
   9
  10 #include "base/memory/scoped_ptr.h"
  11 #include "build/build_config.h"
  12 #include "net/base/net_export.h"
  13 #include "url/gurl.h"
  14
  15 #if defined(USE_NSS)
  16 #include "crypto/crypto_module_blocking_password_delegate.h"
  17 #endif  // defined(USE_NSS)
  18
  19 namespace net {
  20
  21 // This class handles keypair generation for generating client
  22 // certificates via the <keygen> tag.
  23 // <http://dev.w3.org/html5/spec/Overview.html#the-keygen-element>
  24 // <https://developer.mozilla.org/En/HTML/HTML_Extensions/KEYGEN_Tag>
  25
  26 class NET_EXPORT KeygenHandler {
  27  public:
  28   // Creates a handler that will generate a key with the given key size and
  29   // incorporate the |challenge| into the Netscape SPKAC structure. The request
  30   // for the key originated from |url|.
  31   KeygenHandler(int key_size_in_bits,
  32                 const std::string& challenge,
  33                 const GURL& url);
  34   ~KeygenHandler();
  35
  36   // Actually generates the key-pair and the cert request (SPKAC), and returns
  37   // a base64-encoded string suitable for use as the form value of <keygen>.
  38   std::string GenKeyAndSignChallenge();
  39
  40   // Exposed only for unit tests.
  41   void set_stores_key(bool store) { stores_key_ = store;}
  42
  43 #if defined(USE_NSS)
  44   // Register the password delegate to be used if the token is unauthenticated.
  45   // GenKeyAndSignChallenge runs on a worker thread, so using the blocking
  46   // password callback is okay here.
  47   // Takes ownership of the delegate.
  48   void set_crypto_module_password_delegate(
  49       crypto::CryptoModuleBlockingPasswordDelegate* delegate);
  50 #endif  // defined(USE_NSS)
  51
  52  private:
  53   int key_size_in_bits_;  // key size in bits (usually 2048)
  54   std::string challenge_;  // challenge string sent by server
  55   GURL url_;  // the URL that requested the key
  56   bool stores_key_;  // should the generated key-pair be stored persistently?
  57 #if defined(USE_NSS)
  58   // The callback for requesting a password to the PKCS#11 token.
  59   scoped_ptr<crypto::CryptoModuleBlockingPasswordDelegate>
  60       crypto_module_password_delegate_;
  61 #endif  // defined(USE_NSS)
  62 };
  63
  64 }  // namespace net
  65
  66 #endif  // NET_BASE_KEYGEN_HANDLER_H_