Add a regenerate button to regenerate the password in Windows.

rlz/win/lib/process_info.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.
-//
-// Information about the current process.
-
-#include "rlz/win/lib/process_info.h"
-
-#include <windows.h>
-#include <Sddl.h>  // For ConvertSidToStringSid.
-#include <LMCons.h>  // For UNLEN
-
-#include "base/logging.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/process_util.h"
-#include "base/win/scoped_handle.h"
-#include "base/win/windows_version.h"
-#include "rlz/lib/assert.h"
-#include "rlz/win/lib/vista_winnt.h"
-
-namespace {
-
-HRESULT GetCurrentUser(std::wstring* name,
-                       std::wstring* domain,
-                       std::wstring* sid) {
-  DWORD err;
-
-  // Get the current username & domain the hard way.  (GetUserNameEx would be
-  // nice, but unfortunately requires connectivity to a domain controller.
-  // Useless.)
-
-  // (Following call doesn't work if running as a Service - because a Service
-  // runs under special accounts like LOCAL_SYSTEM, not as the logged in user.
-  // In which case, search for and use the process handle of a running
-  // Explorer.exe.)
-  HANDLE token;
-  if (!::OpenProcessToken(::GetCurrentProcess(), TOKEN_QUERY, &token))
-    return E_FAIL;
-
-  base::win::ScopedHandle scoped_process_token(token);
-
-  // (Following call will fail with ERROR_INSUFFICIENT_BUFFER and give us the
-  // required size.)
-  scoped_array<char> token_user_bytes;
-  DWORD token_user_size;
-  DWORD token_user_size2;
-  BOOL result = ::GetTokenInformation(token, TokenUser, NULL, 0,
-                                      &token_user_size);
-  err = ::GetLastError();
-  CHECK(!result && err == ERROR_INSUFFICIENT_BUFFER);
-
-  token_user_bytes.reset(new char[token_user_size]);
-  if (!token_user_bytes.get())
-    return E_OUTOFMEMORY;
-
-  if (!::GetTokenInformation(token, TokenUser, token_user_bytes.get(),
-                             token_user_size, &token_user_size2)) {
-    return E_FAIL;
-  }
-
-  WCHAR user_name[UNLEN + 1];  // max username length
-  WCHAR domain_name[UNLEN + 1];
-  DWORD user_name_size = UNLEN + 1;
-  DWORD domain_name_size = UNLEN + 1;
-  SID_NAME_USE sid_type;
-  TOKEN_USER* token_user =
-      reinterpret_cast<TOKEN_USER*>(token_user_bytes.get());
-  if (!token_user)
-    return E_FAIL;
-  PSID user_sid = token_user->User.Sid;
-  if (!::LookupAccountSidW(NULL, user_sid, user_name, &user_name_size,
-                           domain_name, &domain_name_size, &sid_type)) {
-    return E_FAIL;
-  }
-
-  if (name != NULL) {
-    *name = user_name;
-  }
-  if (domain != NULL) {
-    *domain = domain_name;
-  }
-  if (sid != NULL) {
-    LPWSTR string_sid;
-    ConvertSidToStringSidW(user_sid, &string_sid);
-    *sid = string_sid;  // copy out to cstring
-    // free memory, as documented for ConvertSidToStringSid
-    LocalFree(string_sid);
-  }
-
-  return S_OK;
-}
-
-HRESULT GetElevationType(PTOKEN_ELEVATION_TYPE elevation) {
-  if (!elevation)
-    return E_POINTER;
-
-  *elevation = TokenElevationTypeDefault;
-
-  if (base::win::GetVersion() < base::win::VERSION_VISTA)
-    return E_FAIL;
-
-  HANDLE process_token;
-  if (!OpenProcessToken(GetCurrentProcess(), TOKEN_QUERY, &process_token))
-    return HRESULT_FROM_WIN32(GetLastError());
-
-  base::win::ScopedHandle scoped_process_token(process_token);
-
-  DWORD size;
-  TOKEN_ELEVATION_TYPE elevation_type;
-  if (!GetTokenInformation(process_token, TokenElevationType, &elevation_type,
-                           sizeof(elevation_type), &size)) {
-    return HRESULT_FROM_WIN32(GetLastError());
-  }
-
-  *elevation = elevation_type;
-  return S_OK;
-}
-
-// based on http://msdn2.microsoft.com/en-us/library/aa376389.aspx
-bool GetUserGroup(long* group) {
-  if (!group)
-    return false;
-
-  *group = 0;
-
-  // groups are listed in DECREASING order of importance
-  // (eg. If a user is a member of both the admin group and
-  // the power user group, it is more useful to list the user
-  // as an admin)
-  DWORD user_groups[] =  {DOMAIN_ALIAS_RID_ADMINS,
-                          DOMAIN_ALIAS_RID_POWER_USERS};
-  SID_IDENTIFIER_AUTHORITY nt_authority = SECURITY_NT_AUTHORITY;
-
-  for (int i = 0; i < arraysize(user_groups) && *group == 0; ++i) {
-    PSID current_group;
-    if (AllocateAndInitializeSid(&nt_authority, 2,
-                                 SECURITY_BUILTIN_DOMAIN_RID,
-                                 user_groups[i], 0, 0, 0, 0,
-                                 0, 0, &current_group)) {
-      BOOL current_level;
-      if (CheckTokenMembership(NULL, current_group, &current_level) &&
-          current_level) {
-        *group = user_groups[i];
-      }
-
-      FreeSid(current_group);
-    }
-  }
-
-  return group != 0;
-}
-}  //anonymous
-
-
-namespace rlz_lib {
-
-bool ProcessInfo::IsRunningAsSystem() {
-  static std::wstring name;
-  static std::wstring domain;
-  static std::wstring sid;
-  if (name.empty())
-    CHECK(SUCCEEDED(GetCurrentUser(&name, &domain, &sid)));
-
-  return (name == L"SYSTEM");
-}
-
-bool ProcessInfo::HasAdminRights() {
-  static bool evaluated = false;
-  static bool has_rights = false;
-
-  if (!evaluated) {
-    if (IsRunningAsSystem()) {
-      has_rights = true;
-    } else if (base::win::GetVersion() >= base::win::VERSION_VISTA) {
-      TOKEN_ELEVATION_TYPE elevation;
-      base::IntegrityLevel level;
-
-      if (SUCCEEDED(GetElevationType(&elevation)) &&
-        base::GetProcessIntegrityLevel(base::GetCurrentProcessHandle(), &level))
-        has_rights = (elevation == TokenElevationTypeFull) ||
-                    (level == HIGH_INTEGRITY);
-    } else {
-      long group = 0;
-      if (GetUserGroup(&group))
-        has_rights = (group == DOMAIN_ALIAS_RID_ADMINS);
-    }
-  }
-
-  evaluated = true;
-  if (!has_rights)
-    ASSERT_STRING("ProcessInfo::HasAdminRights: Does not have admin rights.");
-
-  return has_rights;
-}
-
-};  // namespace