1 | #!/usr/bin/env python |
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2 | |
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3 | import sys |
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4 | from pyregfi.structures import * |
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5 | |
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6 | import ctypes |
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7 | import ctypes.util |
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8 | from ctypes import c_char,c_char_p,c_int,c_uint16,c_uint32,c_bool,POINTER |
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9 | |
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10 | regfi = ctypes.CDLL(ctypes.util.find_library('regfi'), use_errno=True) |
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11 | |
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12 | |
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13 | regfi.regfi_alloc.argtypes = [c_int] |
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14 | regfi.regfi_alloc.restype = POINTER(REGFI_FILE) |
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15 | |
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16 | regfi.regfi_alloc_cb.argtypes = [POINTER(REGFI_RAW_FILE)] |
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17 | regfi.regfi_alloc_cb.restype = POINTER(REGFI_FILE) |
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18 | |
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19 | regfi.regfi_free.argtypes = [POINTER(REGFI_FILE)] |
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20 | regfi.regfi_free.restype = None |
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21 | |
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22 | regfi.regfi_log_get_str.argtypes = [] |
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23 | regfi.regfi_log_get_str.restype = c_char_p |
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24 | |
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25 | regfi.regfi_log_set_mask.argtypes = [c_uint16] |
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26 | regfi.regfi_log_set_mask.restype = c_bool |
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27 | |
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28 | regfi.regfi_free_record.argtypes = [c_void_p] |
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29 | regfi.regfi_free_record.restype = None |
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30 | |
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31 | regfi.regfi_fetch_num_subkeys.argtypes = [POINTER(REGFI_NK)] |
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32 | regfi.regfi_fetch_num_subkeys.restype = c_uint32 |
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33 | |
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34 | regfi.regfi_fetch_num_values.argtypes = [POINTER(REGFI_NK)] |
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35 | regfi.regfi_fetch_num_values.restype = c_uint32 |
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36 | |
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37 | regfi.regfi_fetch_classname.argtypes = [POINTER(REGFI_FILE), POINTER(REGFI_NK)] |
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38 | regfi.regfi_fetch_classname.restype = POINTER(REGFI_CLASSNAME) |
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39 | |
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40 | regfi.regfi_fetch_sk.argtypes = [POINTER(REGFI_FILE), POINTER(REGFI_NK)] |
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41 | regfi.regfi_fetch_sk.restype = POINTER(REGFI_SK) |
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42 | |
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43 | regfi.regfi_fetch_data.argtypes = [POINTER(REGFI_FILE), POINTER(REGFI_VK)] |
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44 | regfi.regfi_fetch_data.restype = POINTER(REGFI_DATA) |
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45 | |
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46 | regfi.regfi_find_subkey.argtypes = [POINTER(REGFI_FILE), POINTER(REGFI_NK), |
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47 | c_char_p, POINTER(c_uint32)] |
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48 | regfi.regfi_find_subkey.restype = c_bool |
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49 | |
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50 | regfi.regfi_find_value.argtypes = [POINTER(REGFI_FILE), POINTER(REGFI_NK), |
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51 | c_char_p, POINTER(c_uint32)] |
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52 | regfi.regfi_find_value.restype = c_bool |
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53 | |
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54 | regfi.regfi_get_subkey.argtypes = [POINTER(REGFI_FILE), POINTER(REGFI_NK), |
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55 | c_uint32] |
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56 | regfi.regfi_get_subkey.restype = POINTER(REGFI_NK) |
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57 | |
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58 | regfi.regfi_get_value.argtypes = [POINTER(REGFI_FILE), POINTER(REGFI_NK), |
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59 | c_uint32] |
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60 | regfi.regfi_get_value.restype = POINTER(REGFI_VK) |
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61 | |
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62 | regfi.regfi_iterator_new.argtypes = [POINTER(REGFI_FILE), REGFI_ENCODING] |
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63 | regfi.regfi_iterator_new.restype = POINTER(REGFI_ITERATOR) |
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64 | |
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65 | regfi.regfi_iterator_free.argtypes = [POINTER(REGFI_ITERATOR)] |
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66 | regfi.regfi_iterator_free.restype = None |
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67 | |
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68 | regfi.regfi_iterator_down.argtypes = [POINTER(REGFI_ITERATOR)] |
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69 | regfi.regfi_iterator_down.restype = c_bool |
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70 | |
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71 | regfi.regfi_iterator_up.argtypes = [POINTER(REGFI_ITERATOR)] |
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72 | regfi.regfi_iterator_up.restype = c_bool |
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73 | |
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74 | regfi.regfi_iterator_to_root.argtypes = [POINTER(REGFI_ITERATOR)] |
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75 | regfi.regfi_iterator_to_root.restype = c_bool |
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76 | |
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77 | regfi.regfi_iterator_walk_path.argtypes = [POINTER(REGFI_ITERATOR)] |
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78 | regfi.regfi_iterator_walk_path.restype = c_bool |
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79 | |
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80 | regfi.regfi_iterator_cur_key.argtypes = [POINTER(REGFI_ITERATOR)] |
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81 | regfi.regfi_iterator_cur_key.restype = POINTER(REGFI_NK) |
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82 | |
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83 | regfi.regfi_iterator_first_subkey.argtypes = [POINTER(REGFI_ITERATOR)] |
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84 | regfi.regfi_iterator_first_subkey.restype = c_bool |
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85 | |
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86 | regfi.regfi_iterator_cur_subkey.argtypes = [POINTER(REGFI_ITERATOR)] |
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87 | regfi.regfi_iterator_cur_subkey.restype = POINTER(REGFI_NK) |
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88 | |
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89 | regfi.regfi_iterator_next_subkey.argtypes = [POINTER(REGFI_ITERATOR)] |
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90 | regfi.regfi_iterator_next_subkey.restype = c_bool |
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91 | |
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92 | regfi.regfi_iterator_find_subkey.argtypes = [POINTER(REGFI_ITERATOR), c_char_p] |
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93 | regfi.regfi_iterator_find_subkey.restype = c_bool |
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94 | |
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95 | regfi.regfi_iterator_first_value.argtypes = [POINTER(REGFI_ITERATOR)] |
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96 | regfi.regfi_iterator_first_value.restype = c_bool |
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97 | |
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98 | regfi.regfi_iterator_cur_value.argtypes = [POINTER(REGFI_ITERATOR)] |
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99 | regfi.regfi_iterator_cur_value.restype = POINTER(REGFI_VK) |
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100 | |
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101 | regfi.regfi_iterator_next_value.argtypes = [POINTER(REGFI_ITERATOR)] |
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102 | regfi.regfi_iterator_next_value.restype = c_bool |
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103 | |
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104 | regfi.regfi_iterator_find_value.argtypes = [POINTER(REGFI_ITERATOR), c_char_p] |
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105 | regfi.regfi_iterator_find_value.restype = c_bool |
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106 | |
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107 | |
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108 | |
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109 | regfi.regfi_get_value |
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110 | |
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111 | regfi.regfi_init.argtypes = [] |
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112 | regfi.regfi_init.restype = None |
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113 | regfi.regfi_init() |
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114 | |
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115 | |
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116 | def GetLogMessages(): |
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117 | msgs = regfi.regfi_log_get_str() |
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118 | if msgs == None: |
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119 | return '' |
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120 | return msgs.decode('ascii') |
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121 | |
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122 | |
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123 | def _buffer2bytearray(char_pointer, length): |
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124 | if length == 0 or char_pointer == None: |
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125 | return None |
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126 | |
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127 | ret_val = bytearray(length) |
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128 | for i in range(0,length): |
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129 | ret_val[i] = char_pointer[i][0] |
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130 | |
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131 | return ret_val |
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132 | |
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133 | |
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134 | def _charss2strlist(chars_pointer): |
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135 | ret_val = [] |
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136 | i = 0 |
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137 | s = chars_pointer[i] |
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138 | while s != None: |
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139 | ret_val.append(s.decode('utf-8')) |
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140 | i += 1 |
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141 | s = chars_pointer[i] |
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142 | |
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143 | return ret_val |
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144 | |
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145 | |
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146 | class _StructureWrapper(): |
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147 | "Handles memory management and proxies attribute access to base structures" |
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148 | hive = None |
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149 | base = None |
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150 | |
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151 | def __init__(self, hive, base): |
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152 | self.hive = hive |
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153 | # XXX: check for NULL here, throw an exception if so. |
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154 | self.base = base |
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155 | |
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156 | def __del__(self): |
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157 | regfi.regfi_free_record(self.base) |
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158 | |
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159 | def __getattr__(self, name): |
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160 | return getattr(self.base.contents, name) |
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161 | |
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162 | def __eq__(self, other): |
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163 | return (type(self) == type(other)) and (self.offset == other.offset) |
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164 | |
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165 | def __ne__(self, other): |
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166 | return (not self.__eq__(other)) |
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167 | |
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168 | |
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169 | class Key(_StructureWrapper): |
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170 | pass |
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171 | |
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172 | class Value(_StructureWrapper): |
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173 | pass |
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174 | |
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175 | class Data(_StructureWrapper): |
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176 | pass |
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177 | |
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178 | class Security(_StructureWrapper): |
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179 | pass |
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180 | |
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181 | |
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182 | class _GenericList(): |
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183 | hive = None |
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184 | key = None |
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185 | length = None |
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186 | current = None |
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187 | |
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188 | # implementation-specific functions |
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189 | fetch_num = None |
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190 | find_element = None |
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191 | get_element = None |
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192 | constructor = None |
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193 | |
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194 | def __init__(self, key): |
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195 | self.hive = key.hive |
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196 | # XXX: check for NULL here, throw an exception if so. |
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197 | self.key = key |
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198 | self.length = self.fetch_num(key.base) |
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199 | |
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200 | def __len__(self): |
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201 | return self.length |
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202 | |
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203 | def __getitem__(self, name): |
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204 | index = c_uint32() |
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205 | if isinstance(name, str): |
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206 | name = name.encode('utf-8') |
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207 | |
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208 | if name != None: |
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209 | name = create_string_buffer(bytes(name)) |
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210 | |
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211 | if self.find_element(self.hive.file, self.key.base, name, byref(index)): |
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212 | return self.constructor(self.hive, self.get_element(self.hive.file, |
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213 | self.key.base, |
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214 | index)) |
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215 | raise KeyError('') |
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216 | |
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217 | def get(self, name, default): |
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218 | try: |
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219 | return self[name] |
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220 | except KeyError: |
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221 | return default |
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222 | |
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223 | def __iter__(self): |
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224 | self.current = 0 |
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225 | return self |
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226 | |
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227 | def __next__(self): |
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228 | if self.current >= self.length: |
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229 | raise StopIteration('') |
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230 | |
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231 | elem = self.get_element(self.hive.file, self.key.base, |
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232 | c_uint32(self.current)) |
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233 | self.current += 1 |
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234 | return self.constructor(self.hive, elem) |
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235 | |
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236 | |
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237 | class _SubkeyList(_GenericList): |
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238 | fetch_num = regfi.regfi_fetch_num_subkeys |
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239 | find_element = regfi.regfi_find_subkey |
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240 | get_element = regfi.regfi_get_subkey |
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241 | |
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242 | |
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243 | class _ValueList(_GenericList): |
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244 | fetch_num = regfi.regfi_fetch_num_values |
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245 | find_element = regfi.regfi_find_value |
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246 | get_element = regfi.regfi_get_value |
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247 | |
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248 | |
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249 | class Key(_StructureWrapper): |
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250 | values = None |
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251 | subkeys = None |
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252 | |
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253 | def __init__(self, hive, base): |
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254 | super(Key, self).__init__(hive, base) |
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255 | self.values = _ValueList(self) |
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256 | self.subkeys = _SubkeyList(self) |
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257 | |
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258 | def __getattr__(self, name): |
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259 | ret_val = super(Key, self).__getattr__(name) |
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260 | |
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261 | if name == "name": |
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262 | if ret_val == None: |
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263 | ret_val = self.name_raw |
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264 | else: |
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265 | ret_val = ret_val.decode('utf-8') |
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266 | |
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267 | elif name == "name_raw": |
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268 | length = super(Key, self).__getattr__('name_length') |
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269 | ret_val = _buffer2bytearray(ret_val, length) |
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270 | |
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271 | return ret_val |
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272 | |
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273 | |
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274 | def fetch_security(self): |
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275 | return Security(self.hive, |
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276 | regfi.regfi_fetch_sk(self.hive.file, self.base)) |
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277 | |
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278 | |
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279 | class Value(_StructureWrapper): |
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280 | def __getattr__(self, name): |
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281 | ret_val = None |
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282 | if name == "data": |
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283 | data_p = regfi.regfi_fetch_data(self.hive.file, self.base) |
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284 | try: |
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285 | data_struct = data_p.contents |
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286 | except Exception: |
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287 | return None |
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288 | |
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289 | if data_struct.interpreted_size == 0: |
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290 | ret_val = None |
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291 | elif data_struct.type in (REG_SZ, REG_EXPAND_SZ, REG_LINK): |
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292 | # Unicode strings |
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293 | ret_val = data_struct.interpreted.string.decode('utf-8') |
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294 | elif data_struct.type in (REG_DWORD, REG_DWORD_BE): |
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295 | # 32 bit integers |
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296 | ret_val = data_struct.interpreted.dword |
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297 | elif data_struct.type == REG_QWORD: |
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298 | # 64 bit integers |
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299 | ret_val = data_struct.interpreted.qword |
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300 | elif data_struct.type == REG_MULTI_SZ: |
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301 | ret_val = _charss2strlist(data_struct.interpreted.multiple_string) |
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302 | elif data_struct.type in (REG_NONE, REG_RESOURCE_LIST, |
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303 | REG_FULL_RESOURCE_DESCRIPTOR, |
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304 | REG_RESOURCE_REQUIREMENTS_LIST, |
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305 | REG_BINARY): |
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306 | ret_val = _buffer2bytearray(data_struct.interpreted.none, |
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307 | data_struct.interpreted_size) |
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308 | |
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309 | regfi.regfi_free_record(data_p) |
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310 | |
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311 | elif name == "data_raw": |
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312 | # XXX: should we load the data without interpretation instead? |
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313 | data_p = regfi.regfi_fetch_data(self.hive.file, self.base) |
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314 | try: |
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315 | data_struct = data_p.contents |
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316 | except Exception: |
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317 | return None |
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318 | |
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319 | ret_val = _buffer2bytearray(data_struct.raw, |
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320 | data_struct.size) |
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321 | regfi.regfi_free_record(data_p) |
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322 | |
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323 | else: |
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324 | ret_val = super(Value, self).__getattr__(name) |
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325 | if name == "name": |
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326 | if ret_val == None: |
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327 | ret_val = self.name_raw |
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328 | else: |
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329 | ret_val = ret_val.decode('utf-8') |
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330 | |
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331 | elif name == "name_raw": |
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332 | length = super(Value, self).__getattr__('name_length') |
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333 | ret_val = _buffer2bytearray(ret_val, length) |
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334 | |
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335 | return ret_val |
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336 | |
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337 | |
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338 | # Avoids chicken/egg class definitions. |
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339 | # Also makes for convenient code reuse in these lists' parent classes. |
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340 | _SubkeyList.constructor = Key |
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341 | _ValueList.constructor = Value |
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342 | |
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343 | |
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344 | |
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345 | class Hive(): |
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346 | file = None |
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347 | raw_file = None |
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348 | |
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349 | def __init__(self, fh): |
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350 | # The fileno method may not exist, or it may throw an exception |
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351 | # when called if the file isn't backed with a descriptor. |
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352 | try: |
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353 | if hasattr(fh, 'fileno'): |
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354 | self.file = regfi.regfi_alloc(fh.fileno()) |
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355 | return |
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356 | except: |
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357 | pass |
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358 | |
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359 | self.raw_file = structures.REGFI_RAW_FILE() |
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360 | self.raw_file.fh = fh |
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361 | self.raw_file.seek = seek_cb_type(self.raw_file.cb_seek) |
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362 | self.raw_file.read = read_cb_type(self.raw_file.cb_read) |
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363 | self.file = regfi.regfi_alloc_cb(self.raw_file) |
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364 | |
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365 | def __getattr__(self, name): |
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366 | return getattr(self.file.contents, name) |
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367 | |
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368 | def __del__(self): |
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369 | regfi.regfi_free(self.file) |
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370 | if self.raw_file != None: |
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371 | regfi.regfi_free(self.file) |
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372 | |
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373 | |
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374 | def __iter__(self): |
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375 | return HiveIterator(self) |
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376 | |
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377 | def subtree(self, path): |
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378 | hi = HiveIterator(self) |
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379 | hi.descend(path) |
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380 | return hi |
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381 | |
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382 | |
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383 | class HiveIterator(): |
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384 | hive = None |
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385 | iter = None |
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386 | iteration_root = None |
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387 | |
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388 | def __init__(self, hive): |
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389 | # REGFI_ENCODING_UTF8==1 |
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390 | self.iter = regfi.regfi_iterator_new(hive.file, 1) |
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391 | if self.iter == None: |
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392 | raise Exception("Could not create iterator. Current log:\n" |
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393 | + GetLogMessages()) |
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394 | self.hive = hive |
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395 | |
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396 | def __getattr__(self, name): |
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397 | return getattr(self.file.contents, name) |
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398 | |
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399 | def __del__(self): |
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400 | regfi.regfi_iterator_free(self.iter) |
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401 | |
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402 | def __iter__(self): |
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403 | self.iteration_root = None |
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404 | return self |
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405 | |
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406 | def __next__(self): |
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407 | if self.iteration_root == None: |
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408 | self.iteration_root = self.current_key() |
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409 | elif not regfi.regfi_iterator_down(self.iter): |
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410 | up_ret = regfi.regfi_iterator_up(self.iter) |
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411 | while (up_ret and |
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412 | not regfi.regfi_iterator_next_subkey(self.iter)): |
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413 | if self.iteration_root == self.current_key(): |
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414 | self.iteration_root = None |
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415 | raise StopIteration('') |
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416 | up_ret = regfi.regfi_iterator_up(self.iter) |
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417 | |
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418 | if not up_ret: |
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419 | raise StopIteration('') |
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420 | |
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421 | if not regfi.regfi_iterator_down(self.iter): |
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422 | raise Exception('Error traversing iterator downward.'+ |
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423 | ' Current log:\n'+ GetLogMessages()) |
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424 | |
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425 | regfi.regfi_iterator_first_subkey(self.iter) |
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426 | return self.current_key() |
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427 | |
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428 | def down(self): |
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429 | pass |
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430 | |
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431 | def up(self): |
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432 | pass |
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433 | |
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434 | def descend(self, path): |
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435 | #set up generator |
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436 | cpath = (bytes(p,'ascii') for p in path) |
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437 | |
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438 | # evaluate generator and create char* array |
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439 | apath = (c_char_p*len(path))(*cpath) |
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440 | |
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441 | if not regfi.regfi_iterator_walk_path(self.iter,apath): |
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442 | raise Exception('Could not locate path.\n'+GetLogMessages()) |
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443 | |
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444 | def current_key(self): |
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445 | return Key(self.hive, regfi.regfi_iterator_cur_key(self.iter)) |
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