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1 class _DEX_header(object):
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2 magic = None # 0x00, 8 bytes
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3 checksum = None # 0x08, 4 bytes
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4 signature = None # 0x0c, 20 bytes
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5 fileSize = None # 0x20, 4 bytes
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6 headerSize = None # 0x24
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7 endianTag = None # 0x28
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8 linkSize = None # 0x2c
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9 linkOff = None # 0x30
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10 mapOff = None # 0x34
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11 stringIdsSize = None # 0x38
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12 stringIdsOff = None # 0x3c
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13 typeIdsSize = None # 0x40
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14 typeIdsOff = None # 0x44
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15 protoIdsSize = None # 0x48
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16 protoIdsOff = None # 0x4c
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17 fieldIdsSize = None # 0x50
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18 fieldIdsOff = None # 0x54
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19 methodIdsSize = None # 0x58
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20 methodIdsOff = None # 0x5c
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21 classDefsSize = None # 0x60
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22 classDefsOff = None # 0x64
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23 dataSize = None # 0x68
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24 dataOff = None # 0x6c
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25
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26 def parse(self, data):
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27 self.magic = data[:8]
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28 self.checksum = data[8: 0x0c]
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29 self.signature = data[0x0c: 0x20]
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30
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31 idx = 0x20
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32 fields = 'fileSize headerSize endianTag linkSize linkOff mapOff ' \
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33 'stringIdsSize stringIdsOff typeIdsSize typeIdsOff ' \
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34 'protoIdsSize protoIdsOff fieldIdsSize fieldIdsOff ' \
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35 'methodIdsSize methodIdsOff classDefsSize classDefsOff ' \
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36 'dataSize dataOff'.split()
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37 for field in fields:
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38 d = data[idx: idx + 4]
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39 value = _to_uint(d)
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40 setattr(self, field, value)
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41 idx = idx + 4
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42 pass
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43 pass
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44 pass
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45
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46
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47 def _to_uint(data):
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48 v = 0
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49 for c in data:
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50 v = (v << 8) + ord(c)
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51 pass
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52 return v
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53
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54
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55 class _DEX_MapItem(object):
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56 type = None # 2 bytes
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57 unused = None # 2 bytes
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58 size = None # 4 bytes
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59 offset = None # 4 bytes
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60
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61 data_size = 12
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62
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63 def parse(self, data):
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64 self.type = _to_uint(data[:2])
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65 self.size = _to_uint(data[4:8])
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66 self.offset = _to_uint(data[8:12])
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67 pass
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68 pass
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69
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70 class _DEX_TypeId(object):
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71 descriptorIdx = None # 4 bytes
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72
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73 data_size = 4
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74
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75 def parse(self, data):
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76 self.descriptorIdx = _to_uint(data[:4])
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77 pass
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78 pass
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79
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80
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81 class _DEX_ProtoId(object):
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82 shortyIdx = None # 4 bytes
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83 returnTypeIdx = None # 4 bytes
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84 parametersOff = None # 4 bytes
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85
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86 data_size = 12
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87
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88 def parse(self, data):
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89 self.shortyIdx = _to_uint(data[:4])
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90 self.returnTypeIdx = _to_uint(data[4:8])
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91 self.parametersOff = _to_uint(data[8:12])
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92 pass
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93 pass
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94
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95
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96 class _DEX_FieldId(object):
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97 classIdx # 2 bytes
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98 typeIdx # 2 bytes
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99 nameIdx # 4 bytes
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100
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101 data_size = 8
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102
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103 def parse(self, data):
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104 self.classIdx = _to_uint(data[:2])
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105 self.typeIdx = _to_uint(data[2:4])
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106 self.nameIdx = _to_uint(data[4:8])
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107 pass
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108 pass
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109
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110
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111 class _DEX_MethodId(object):
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112 classIdx # 2 bytes
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113 protoIdx # 2 bytes
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114 nameIdx # 4 bytes
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115
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116 data_size = 8
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117
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118 def parse(self, data):
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119 self.classIdx = _to_uint(data[:2])
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120 self.protoIdx = _to_uint(data[2:4])
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121 self.nameIdx = _to_uint(data[4:8])
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122 pass
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123 pass
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124
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125 class _DEX_ClassDef(object):
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126 classIdx = None # 0x00
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127 accessFlags = None # 0x04
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128 superclassIdx = None # 0x08
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129 interfacesOff = None # 0x0c
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130 sourceFileIdx = None # 0x10
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131 annotationsOff = None # 0x14
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132 classDataOff = None # 0x18
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133 staticValuesOff = None # 0x1c
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134
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135 data_size = 0x20
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136
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137 def parse(self, data):
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138 self.classIdx = _to_uint(data[:4])
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139 self.accessFlags = _to_uint(data[4:8])
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140 self.superclassIdx = _to_uint(data[8:0xc])
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141 self.interfacesOff = _to_uint(data[0xc:0x10])
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142 self.sourceFileIdx = _to_uint(data[0x10:0x14])
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143 self.annotationsOff = _to_uint(data[0x14:0x18])
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144 self.classDataOff = _to_uint(data[0x18:0x1c])
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145 self.staticValuesOff = _to_uint(data[0x1c:0x20])
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146 pass
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147 pass
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148
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149
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150 class DEXFile(object):
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151 _data = None
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152 _header = None
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153 _strings = None
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154
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155 def __init__(self):
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156 pass
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157
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158 def open(self, filename):
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159 fo = file(filename)
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160 data = fo.read()
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161
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162 self.parse(data)
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163 pass
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164
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165 def parse(self, data):
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166 self._data = data
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167 header = _DEX_header()
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168 header.parse(data)
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169 self._header = header
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170 pass
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171 pass
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