[204] | 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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[207] | 8 | from ctypes import c_char,c_char_p,c_int,c_uint16,c_uint32,c_bool,POINTER |
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[204] | 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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[205] | 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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[204] | 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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[205] | 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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[207] | 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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[206] | 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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[207] | 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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[205] | 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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[207] | 108 | |
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| 109 | regfi.regfi_get_value |
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| 110 | |
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[204] | 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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[205] | 116 | def GetLogMessages(): |
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[206] | 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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[207] | 120 | return msgs.decode('ascii') |
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[205] | 121 | |
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| 122 | |
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[208] | 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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[209] | 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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[208] | 142 | |
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[209] | 143 | return ret_val |
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| 144 | |
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[208] | 145 | |
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[206] | 146 | class _StructureWrapper(): |
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| 147 | "Handles memory management and proxies attribute access to base structures" |
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[207] | 148 | hive = None |
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[206] | 149 | base = None |
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| 150 | |
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[207] | 151 | def __init__(self, hive, base): |
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| 152 | self.hive = hive |
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[206] | 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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[208] | 169 | class Key(_StructureWrapper): |
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| 170 | pass |
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| 171 | |
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[206] | 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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[207] | 181 | |
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[208] | 182 | class _GenericList(): |
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[207] | 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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[208] | 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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[207] | 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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[208] | 198 | self.length = self.fetch_num(key.base) |
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[207] | 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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[208] | 205 | if isinstance(name, str): |
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| 206 | name = name.encode('utf-8') |
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| 207 | |
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[209] | 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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[208] | 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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[207] | 215 | raise KeyError('') |
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| 216 | |
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[209] | 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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[207] | 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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[208] | 231 | elem = self.get_element(self.hive.file, self.key.base, |
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| 232 | c_uint32(self.current)) |
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[207] | 233 | self.current += 1 |
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[209] | 234 | return self.constructor(self.hive, elem) |
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[207] | 235 | |
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| 236 | |
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[208] | 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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[207] | 249 | class Key(_StructureWrapper): |
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| 250 | values = None |
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[208] | 251 | subkeys = None |
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[207] | 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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[208] | 256 | self.subkeys = _SubkeyList(self) |
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[207] | 257 | |
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[208] | 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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[209] | 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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[208] | 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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[207] | 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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[208] | 279 | class Value(_StructureWrapper): |
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| 280 | def __getattr__(self, name): |
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[209] | 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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[208] | 288 | |
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[209] | 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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[208] | 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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[205] | 345 | class Hive(): |
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[204] | 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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[209] | 350 | # The fileno method may not exist, or it may throw an exception |
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[205] | 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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[204] | 358 | |
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[205] | 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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[204] | 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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[205] | 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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[204] | 373 | |
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[205] | 374 | def __iter__(self): |
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| 375 | return HiveIterator(self) |
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[204] | 376 | |
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[206] | 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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[205] | 381 | |
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[206] | 382 | |
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[205] | 383 | class HiveIterator(): |
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| 384 | hive = None |
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| 385 | iter = None |
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[206] | 386 | iteration_root = None |
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[205] | 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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[206] | 403 | self.iteration_root = None |
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[205] | 404 | return self |
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| 405 | |
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| 406 | def __next__(self): |
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[206] | 407 | if self.iteration_root == None: |
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| 408 | self.iteration_root = self.current_key() |
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[205] | 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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[206] | 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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[205] | 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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[206] | 426 | return self.current_key() |
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[205] | 427 | |
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[206] | 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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[207] | 445 | return Key(self.hive, regfi.regfi_iterator_cur_key(self.iter)) |
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