Initialize per-ChromeOS-user NSS slots and provide the functions to access them.

crypto/nss_util_internal.h

 // 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.
 
 #ifndef CRYPTO_NSS_UTIL_INTERNAL_H_
 #define CRYPTO_NSS_UTIL_INTERNAL_H_
 
 #include <secmodt.h>
 
+#include "base/callback.h"
+#include "base/compiler_specific.h"
 #include "crypto/crypto_export.h"
+#include "crypto/scoped_nss_types.h"
+
+namespace base {
+class FilePath;
+}
 
 // These functions return a type defined in an NSS header, and so cannot be
 // declared in nss_util.h.  Hence, they are declared here.
 
 namespace crypto {
 
 // Returns a reference to the default NSS key slot for storing
 // public-key data only (e.g. server certs). Caller must release
 // returned reference with PK11_FreeSlot.
-CRYPTO_EXPORT PK11SlotInfo* GetPublicNSSKeySlot();
+CRYPTO_EXPORT PK11SlotInfo* GetPublicNSSKeySlot() WARN_UNUSED_RESULT;
 
 // Returns a reference to the default slot for storing private-key and
 // mixed private-key/public-key data.  Returns a hardware (TPM) NSS
 // key slot if on ChromeOS and EnableTPMForNSS() has been called
 // successfully. Caller must release returned reference with
 // PK11_FreeSlot.
-CRYPTO_EXPORT PK11SlotInfo* GetPrivateNSSKeySlot();
+CRYPTO_EXPORT PK11SlotInfo* GetPrivateNSSKeySlot() WARN_UNUSED_RESULT;
 
 // A helper class that acquires the SECMOD list read lock while the
 // AutoSECMODListReadLock is in scope.
 class AutoSECMODListReadLock {
  public:
   AutoSECMODListReadLock();
   ~AutoSECMODListReadLock();
 
  private:
   SECMODListLock* lock_;
   DISALLOW_COPY_AND_ASSIGN(AutoSECMODListReadLock);
 };
 
+#if defined(OS_CHROMEOS)
+// Prepare per-user NSS slot mapping. It is safe to call this function multiple
+// times. Returns true if the user was added, or false if it already existed.
+CRYPTO_EXPORT bool InitializeNSSForChromeOSUser(
+    const std::string& email,
+    const std::string& username_hash,
+    bool is_primary_user,
+    const base::FilePath& path) WARN_UNUSED_RESULT;
+
+// Use TPM slot |slot_id| for user.  InitializeNSSForChromeOSUser must have been
+// called first.
+CRYPTO_EXPORT void InitializeTPMForChromeOSUser(
+    const std::string& username_hash,
+    CK_SLOT_ID slot_id);
+
+// Use the software slot as the private slot for user.
+// InitializeNSSForChromeOSUser must have been called first.
+CRYPTO_EXPORT void InitializePrivateSoftwareSlotForChromeOSUser(
+    const std::string& username_hash);
+
+// Returns a reference to the public slot for user.
+CRYPTO_EXPORT ScopedPK11Slot GetPublicSlotForChromeOSUser(
+    const std::string& username_hash) WARN_UNUSED_RESULT;
+
+// Returns the private slot for |username_hash| if it is loaded. If it is not
+// loaded and |callback| is non-null, the |callback| will be run once the slot
+// is loaded.
+CRYPTO_EXPORT ScopedPK11Slot GetPrivateSlotForChromeOSUser(
+    const std::string& username_hash,
+    const base::Callback<void(ScopedPK11Slot)>& callback) WARN_UNUSED_RESULT;
+#endif  // defined(OS_CHROMEOS)
+
 }  // namespace crypto
 
 #endif  // CRYPTO_NSS_UTIL_INTERNAL_H_