Add a regenerate button to regenerate the password in Windows.

rlz/win/lib/machine_deal.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.
-//
-// Library functions related to the OEM Deal Confirmation Code.
-
-#include "rlz/win/lib/machine_deal.h"
-
-#include <windows.h>
-#include <vector>
-
-#include "base/basictypes.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/string_split.h"
-#include "base/string_util.h"
-#include "base/stringprintf.h"
-#include "base/win/registry.h"
-#include "rlz/lib/assert.h"
-#include "rlz/lib/lib_values.h"
-#include "rlz/win/lib/lib_mutex.h"
-#include "rlz/win/lib/registry_util.h"
-#include "rlz/win/lib/rlz_value_store_registry.h"
-
-const wchar_t kDccValueName[]             = L"DCC";
-
-namespace {
-
-// Current DCC can only uses [a-zA-Z0-9_-!@$*();.<>,:]
-// We will be more liberal and allow some additional chars, but not url meta
-// chars.
-bool IsGoodDccChar(char ch) {
-  if (IsAsciiAlpha(ch) || IsAsciiDigit(ch))
-    return true;
-
-  switch (ch) {
-    case '_':
-    case '-':
-    case '!':
-    case '@':
-    case '$':
-    case '*':
-    case '(':
-    case ')':
-    case ';':
-    case '.':
-    case '<':
-    case '>':
-    case ',':
-    case ':':
-      return true;
-  }
-
-  return false;
-}
-
-// This function will remove bad rlz chars and also limit the max rlz to some
-// reasonable size. It also assumes that normalized_dcc is at least
-// kMaxDccLength+1 long.
-void NormalizeDcc(const char* raw_dcc, char* normalized_dcc) {
-  int index = 0;
-  for (; raw_dcc[index] != 0 && index < rlz_lib::kMaxDccLength; ++index) {
-    char current = raw_dcc[index];
-    if (IsGoodDccChar(current)) {
-      normalized_dcc[index] = current;
-    } else {
-      normalized_dcc[index] = '.';
-    }
-  }
-
-  normalized_dcc[index] = 0;
-}
-
-bool GetResponseLine(const char* response_text, int response_length,
-                     int* search_index, std::string* response_line) {
-  if (!response_line || !search_index || *search_index > response_length)
-    return false;
-
-  response_line->clear();
-
-  if (*search_index < 0)
-    return false;
-
-  int line_begin = *search_index;
-  const char* line_end = strchr(response_text + line_begin, '\n');
-
-  if (line_end == NULL || line_end - response_text > response_length) {
-    line_end = response_text + response_length;
-    *search_index = -1;
-  } else {
-    *search_index = line_end - response_text + 1;
-  }
-
-  response_line->assign(response_text + line_begin,
-                        line_end - response_text - line_begin);
-  return true;
-}
-
-bool GetResponseValue(const std::string& response_line,
-                      const std::string& response_key,
-                      std::string* value) {
-  if (!value)
-    return false;
-
-  value->clear();
-
-  if (!StartsWithASCII(response_line, response_key, true))
-    return false;
-
-  std::vector<std::string> tokens;
-  base::SplitString(response_line, ':', &tokens);
-  if (tokens.size() != 2)
-    return false;
-
-  // The first token is the key, the second is the value.  The value is already
-  // trimmed for whitespace.
-  *value = tokens[1];
-  return true;
-}
-
-}  // namespace anonymous
-
-namespace rlz_lib {
-
-bool MachineDealCode::Set(const char* dcc) {
-  LibMutex lock;
-  if (lock.failed())
-    return false;
-
-  // TODO: if (!ProcessInfo::CanWriteMachineKey()) return false;
-
-  // Validate the new dcc value.
-  size_t length = strlen(dcc);
-  if (length >  kMaxDccLength) {
-    ASSERT_STRING("MachineDealCode::Set: DCC length is exceeds max allowed.");
-    return false;
-  }
-
-  base::win::RegKey hklm_key(HKEY_LOCAL_MACHINE,
-                             RlzValueStoreRegistry::GetWideLibKeyName().c_str(),
-                             KEY_READ | KEY_WRITE | KEY_WOW64_32KEY);
-  if (!hklm_key.Valid()) {
-    ASSERT_STRING("MachineDealCode::Set: Unable to create / open machine key."
-                  " Did you call rlz_lib::CreateMachineState()?");
-    return false;
-  }
-
-  char normalized_dcc[kMaxDccLength + 1];
-  NormalizeDcc(dcc, normalized_dcc);
-  VERIFY(length == strlen(normalized_dcc));
-
-  // Write the DCC to HKLM.  Note that we need to include the null character
-  // when writing the string.
-  if (!RegKeyWriteValue(hklm_key, kDccValueName, normalized_dcc)) {
-    ASSERT_STRING("MachineDealCode::Set: Could not write the DCC value");
-    return false;
-  }
-
-  return true;
-}
-
-bool MachineDealCode::GetNewCodeFromPingResponse(const char* response,
-    bool* has_new_dcc, char* new_dcc, int new_dcc_size) {
-  if (!has_new_dcc || !new_dcc || !new_dcc_size)
-    return false;
-
-  *has_new_dcc = false;
-  new_dcc[0] = 0;
-
-  int response_length = -1;
-  if (!IsPingResponseValid(response, &response_length))
-    return false;
-
-  // Get the current DCC value to compare to later)
-  char stored_dcc[kMaxDccLength + 1];
-  if (!Get(stored_dcc, arraysize(stored_dcc)))
-    stored_dcc[0] = 0;
-
-  int search_index = 0;
-  std::string response_line;
-  std::string new_dcc_value;
-  bool old_dcc_confirmed = false;
-  const std::string dcc_cgi(kDccCgiVariable);
-  const std::string dcc_cgi_response(kSetDccResponseVariable);
-  while (GetResponseLine(response, response_length, &search_index,
-                         &response_line)) {
-    std::string value;
-
-    if (!old_dcc_confirmed &&
-        GetResponseValue(response_line, dcc_cgi, &value)) {
-      // This is the old DCC confirmation - should match value in registry.
-      if (value != stored_dcc)
-        return false;  // Corrupted DCC - ignore this response.
-      else
-        old_dcc_confirmed = true;
-      continue;
-    }
-
-    if (!(*has_new_dcc) &&
-        GetResponseValue(response_line, dcc_cgi_response, &value)) {
-      // This is the new DCC.
-      if (value.size() > kMaxDccLength) continue;  // Too long
-      *has_new_dcc = true;
-      new_dcc_value = value;
-    }
-  }
-
-  old_dcc_confirmed |= (NULL == stored_dcc[0]);
-
-  base::strlcpy(new_dcc, new_dcc_value.c_str(), new_dcc_size);
-  return old_dcc_confirmed;
-}
-
-bool MachineDealCode::SetFromPingResponse(const char* response) {
-  bool has_new_dcc = false;
-  char new_dcc[kMaxDccLength + 1];
-
-  bool response_valid = GetNewCodeFromPingResponse(
-      response, &has_new_dcc, new_dcc, arraysize(new_dcc));
-
-  if (response_valid && has_new_dcc)
-    return Set(new_dcc);
-
-  return response_valid;
-}
-
-bool MachineDealCode::GetAsCgi(char* cgi, int cgi_size) {
-  if (!cgi || cgi_size <= 0) {
-    ASSERT_STRING("MachineDealCode::GetAsCgi: Invalid buffer");
-    return false;
-  }
-
-  cgi[0] = 0;
-
-  std::string cgi_arg;
-  base::StringAppendF(&cgi_arg, "%s=", kDccCgiVariable);
-  int cgi_arg_length = cgi_arg.size();
-
-  if (cgi_arg_length >= cgi_size) {
-    ASSERT_STRING("MachineDealCode::GetAsCgi: Insufficient buffer size");
-    return false;
-  }
-
-  base::strlcpy(cgi, cgi_arg.c_str(), cgi_size);
-
-  if (!Get(cgi + cgi_arg_length, cgi_size - cgi_arg_length)) {
-    cgi[0] = 0;
-    return false;
-  }
-  return true;
-}
-
-bool MachineDealCode::Get(char* dcc, int dcc_size) {
-  LibMutex lock;
-  if (lock.failed())
-    return false;
-
-  if (!dcc || dcc_size <= 0) {
-    ASSERT_STRING("MachineDealCode::Get: Invalid buffer");
-    return false;
-  }
-
-  dcc[0] = 0;
-
-  base::win::RegKey dcc_key(HKEY_LOCAL_MACHINE,
-                            RlzValueStoreRegistry::GetWideLibKeyName().c_str(),
-                            KEY_READ | KEY_WOW64_32KEY);
-  if (!dcc_key.Valid())
-    return false;  // no DCC key.
-
-  size_t size = dcc_size;
-  if (!RegKeyReadValue(dcc_key, kDccValueName, dcc, &size)) {
-    ASSERT_STRING("MachineDealCode::Get: Insufficient buffer size");
-    dcc[0] = 0;
-    return false;
-  }
-
-  return true;
-}
-
-bool MachineDealCode::Clear() {
-  base::win::RegKey dcc_key(HKEY_LOCAL_MACHINE,
-                            RlzValueStoreRegistry::GetWideLibKeyName().c_str(),
-                            KEY_READ | KEY_WRITE | KEY_WOW64_32KEY);
-  if (!dcc_key.Valid())
-    return false;  // no DCC key.
-
-  dcc_key.DeleteValue(kDccValueName);
-
-  // Verify deletion.
-  wchar_t dcc[kMaxDccLength + 1];
-  DWORD dcc_size = arraysize(dcc);
-  if (dcc_key.ReadValue(kDccValueName, dcc, &dcc_size, NULL) == ERROR_SUCCESS) {
-    ASSERT_STRING("MachineDealCode::Clear: Could not delete the DCC value.");
-    return false;
-  }
-
-  return true;
-}
-
-}  // namespace rlz_lib