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31 """
32 Data directory classes.
33 """
34
35 __revision__ = "$Id$"
36
37 __all__ = [
38 "Directory",
39 "DataDirectory",
40 ]
41
42 import consts
43 import excep
44 import datatypes
45
46 from struct import pack
47
48 dirs = ["EXPORT_DIRECTORY","IMPORT_DIRECTORY","RESOURCE_DIRECTORY","EXCEPTION_DIRECTORY","SECURITY_DIRECTORY",\
49 "RELOCATION_DIRECTORY","DEBUG_DIRECTORY","ARCHITECTURE_DIRECTORY","RESERVED_DIRECTORY","TLS_DIRECTORY",\
50 "CONFIGURATION_DIRECTORY","BOUND_IMPORT_DIRECTORY","IAT_DIRECTORY","DELAY_IMPORT_DIRECTORY","NET_METADATA_DIRECTORY",\
51 "RESERVED_DIRECTORY"]
54 """Directory object."""
56 """
57 Class representation of the C{IMAGE_DATA_DIRECTORY} structure.
58 @see: U{http://msdn.microsoft.com/es-es/library/windows/desktop/ms680305%28v=vs.85%29.aspx}
59
60 @type shouldPack: bool
61 @param shouldPack: If set to C{True} the L{Directory} object will be packed. If set to C{False} the object won't be packed.
62 """
63 self.name = datatypes.String("")
64 self.rva = datatypes.DWORD(0)
65 self.size = datatypes.DWORD(0)
66 self.info = None
67 self.shouldPack = shouldPack
68
70 return str(self.rva) + str(self.size)
71
74
75 @staticmethod
76 - def parse(readDataInstance):
77 """
78 Returns a L{Directory}-like object.
79
80 @type readDataInstance: L{ReadData}
81 @param readDataInstance: L{ReadData} object to read from.
82
83 @rtype: L{Directory}
84 @return: L{Directory} object.
85 """
86 d = Directory()
87 d.rva.value = readDataInstance.readDword()
88 d.size.value = readDataInstance.readDword()
89 return d
90
94
96 """DataDirectory object."""
98 """
99 Array of L{Directory} objects.
100
101 @type shouldPack: bool
102 @param shouldPack: If set to C{True} the L{DataDirectory} object will be packed. If set to C{False} the object won't packed.
103 """
104 self.shouldPack = shouldPack
105
106 for i in range(consts.IMAGE_NUMBEROF_DIRECTORY_ENTRIES):
107 dir = Directory()
108 dir.name.value = dirs[i]
109 self.append(dir)
110
112 packedRvasAndSizes = ""
113 for directory in self:
114 packedRvasAndSizes += str(directory)
115 return packedRvasAndSizes
116
117 @staticmethod
118 - def parse(readDataInstance):
119 """Returns a L{DataDirectory}-like object.
120
121 @type readDataInstance: L{ReadData}
122 @param readDataInstance: L{ReadData} object to read from.
123
124 @rtype: L{DataDirectory}
125 @return: The L{DataDirectory} object containing L{consts.IMAGE_NUMBEROF_DIRECTORY_ENTRIES} L{Directory} objects.
126
127 @raise DirectoryEntriesLengthException: The L{ReadData} instance has an incorrect number of L{Directory} objects.
128 """
129 if len(readDataInstance) == consts.IMAGE_NUMBEROF_DIRECTORY_ENTRIES * 8:
130 newDataDirectory = DataDirectory()
131 for i in range(consts.IMAGE_NUMBEROF_DIRECTORY_ENTRIES):
132 newDataDirectory[i].name.value = dirs[i]
133 newDataDirectory[i].rva.value = readDataInstance.readDword()
134 newDataDirectory[i].size.value = readDataInstance.readDword()
135 else:
136 raise excep.DirectoryEntriesLengthException("The IMAGE_NUMBEROF_DIRECTORY_ENTRIES does not match with the length of the passed argument.")
137 return newDataDirectory
138