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Copy pathdatabuffer.py
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179 lines (156 loc) · 6.2 KB
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# Copyright (c) 2015-2026 Vector 35 Inc
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to
# deal in the Software without restriction, including without limitation the
# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
# sell copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
# IN THE SOFTWARE.
import ctypes
from typing import Optional, Union
# Binary Ninja components
from . import _binaryninjacore as core
DataBufferInputType = Union[str, bytes, 'DataBuffer', int]
class DataBuffer:
def __init__(self, contents: Union[str, bytes, 'DataBuffer', int] = b"", handle=None):
if handle is not None:
self.handle = core.handle_of_type(handle, core.BNDataBuffer)
elif isinstance(contents, int):
self.handle = core.BNCreateDataBuffer(None, contents)
elif isinstance(contents, DataBuffer):
self.handle = core.BNDuplicateDataBuffer(contents.handle)
elif isinstance(contents, str):
self.handle = core.BNCreateDataBuffer(contents.encode("utf-8"), len(contents.encode("utf-8")))
elif isinstance(contents, bytes):
self.handle = core.BNCreateDataBuffer(contents, len(contents))
elif isinstance(contents, bytearray):
b = bytes(contents)
self.handle = core.BNCreateDataBuffer(b, len(b))
else:
raise TypeError(f"type {type(contents)} not convertable to DataBuffer")
def __del__(self):
if core is not None:
core.BNFreeDataBuffer(self.handle)
def __len__(self):
return int(core.BNGetDataBufferLength(self.handle))
def __getitem__(self, i) -> bytes:
if isinstance(i, tuple):
result = bytes()
for s in i:
result += self.__getitem__(s)
return result
elif isinstance(i, slice):
if i.step is not None:
i = i.indices(len(self))
start = i[0]
stop = i[1]
if stop <= start:
return b""
buf = ctypes.create_string_buffer(stop - start)
data = core.BNGetDataBufferContentsAt(self.handle, start)
assert data is not None, "core.BNGetDataBufferContentsAt returned None"
ctypes.memmove(buf, data, stop - start)
return buf.raw
else:
return bytes(self)[i]
elif i < 0:
if i >= -len(self):
return core.BNGetDataBufferByte(self.handle, int(len(self) + i)).to_bytes(1, "little")
raise IndexError("index out of range")
elif i < len(self):
return core.BNGetDataBufferByte(self.handle, int(i)).to_bytes(1, "little")
else:
raise IndexError("index out of range")
def __setitem__(self, i, value):
if isinstance(i, slice):
if i.step is not None:
raise IndexError("step not supported on assignment")
i = i.indices(len(self))
start = i[0]
stop = i[1]
if stop < start:
stop = start
if len(value) != (stop - start):
data = bytes(self)
data = data[0:start] + value + data[stop:]
core.BNSetDataBufferContents(self.handle, data, len(data))
else:
value = str(value)
buf = ctypes.create_string_buffer(len(value))
data = core.BNGetDataBufferContentsAt(self.handle, start)
assert data is not None, "core.BNGetDataBufferContentsAt returned None"
ctypes.memmove(data, buf, len(value))
elif i < 0:
if i >= -len(self):
if len(value) != 1:
raise ValueError("expected single byte for assignment")
value = str(value)
buf = ctypes.create_string_buffer(len(value))
data = core.BNGetDataBufferContentsAt(self.handle, int(len(self) + i))
assert data is not None, "core.BNGetDataBufferContentsAt returned None"
ctypes.memmove(data, buf, 1)
else:
raise IndexError("index out of range")
elif i < len(self):
if len(value) != 1:
raise ValueError("expected single byte for assignment")
value = str(value)
buf = ctypes.create_string_buffer(len(value))
data = core.BNGetDataBufferContentsAt(self.handle, int(i))
assert data is not None, "core.BNGetDataBufferContentsAt returned None"
ctypes.memmove(data, buf, 1)
else:
raise IndexError("index out of range")
def __str__(self):
buf = ctypes.create_string_buffer(len(self))
data = core.BNGetDataBufferContents(self.handle)
assert data is not None, "core.BNGetDataBufferContents returned None"
ctypes.memmove(buf, data, len(self))
try:
return buf.raw.decode('utf8')
except UnicodeDecodeError:
return buf.raw.decode('charmap')
def __bytes__(self):
buf = ctypes.create_string_buffer(len(self))
data = core.BNGetDataBufferContents(self.handle)
assert data is not None, "core.BNGetDataBufferContents returned None"
ctypes.memmove(buf, data, len(self))
return buf.raw
def __eq__(self, other: 'DataBuffer') -> bool:
# Not cryptographically secure
if len(self) != len(other):
return False
return bytes(self) == bytes(other)
def escape(self, null_terminates=False, escape_printable=False) -> str:
return core.BNDataBufferToEscapedString(self.handle, null_terminates, escape_printable)
def unescape(self) -> 'DataBuffer':
return DataBuffer(handle=core.BNDecodeEscapedString(str(self)))
def base64_encode(self) -> str:
return core.BNDataBufferToBase64(self.handle)
def base64_decode(self) -> 'DataBuffer':
return DataBuffer(handle=core.BNDecodeBase64(str(self)))
def zlib_compress(self) -> Optional['DataBuffer']:
buf = core.BNZlibCompress(self.handle)
if buf is None:
return None
return DataBuffer(handle=buf)
def zlib_decompress(self) -> Optional['DataBuffer']:
buf = core.BNZlibDecompress(self.handle)
if buf is None:
return None
return DataBuffer(handle=buf)
def escape_string(text: bytes) -> str:
return DataBuffer(text).escape()
def unescape_string(text: bytes) -> 'DataBuffer':
return DataBuffer(text).unescape()