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117 lines
3.9 KiB
117 lines
3.9 KiB
#!/usr/bin/env python
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# Copyright (c) 2014 clowwindy
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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# SOFTWARE.
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from __future__ import absolute_import, division, print_function, \
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with_statement
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import logging
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def find_library(possible_lib_names, search_symbol, library_name):
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from ctypes.util import find_library
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from ctypes import CDLL
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paths = []
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if type(possible_lib_names) not in (list, tuple):
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possible_lib_names = [possible_lib_names]
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for name in possible_lib_names:
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path = find_library(name)
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if path:
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paths.append(path)
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if not paths:
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# We may get here when find_library fails because, for example,
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# the user does not have sufficient privileges to access those
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# tools underlying find_library on linux.
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import glob
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for name in possible_lib_names:
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patterns = [
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'/usr/local/lib*/lib%s.*' % name,
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'/usr/lib*/lib%s.*' % name,
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'lib%s.*' % name,
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'%s.dll' % name,
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'lib%s.dll' % name]
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for pat in patterns:
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files = glob.glob(pat)
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if files:
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paths.extend(files)
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for path in paths:
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try:
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lib = CDLL(path)
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if hasattr(lib, search_symbol):
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logging.info('loading %s from %s', library_name, path)
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return lib
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else:
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logging.warn('can\'t find symbol %s in %s', search_symbol,
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path)
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except Exception:
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pass
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return None
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def run_cipher(cipher, decipher):
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from os import urandom
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import random
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import time
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BLOCK_SIZE = 16384
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rounds = 1 * 1024
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plain = urandom(BLOCK_SIZE * rounds)
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results = []
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pos = 0
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print('test start')
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start = time.time()
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while pos < len(plain):
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l = random.randint(100, 32768)
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c = cipher.update(plain[pos:pos + l])
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results.append(c)
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pos += l
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pos = 0
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c = b''.join(results)
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results = []
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while pos < len(plain):
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l = random.randint(100, 32768)
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results.append(decipher.update(c[pos:pos + l]))
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pos += l
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end = time.time()
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print('speed: %d bytes/s' % (BLOCK_SIZE * rounds / (end - start)))
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assert b''.join(results) == plain
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def test_find_library():
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assert find_library('c', 'strcpy', 'libc') is not None
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assert find_library(['c'], 'strcpy', 'libc') is not None
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assert find_library(('c',), 'strcpy', 'libc') is not None
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assert find_library('crypto', 'EVP_CipherUpdate', 'libcrypto') is not None
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assert find_library('notexist', 'strcpy', 'libnotexist') is None
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assert find_library('c', 'symbol_not_exist', 'c') is None
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assert find_library(('notexist', 'c', 'crypto'),
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'EVP_CipherUpdate', 'libc') is not None
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if __name__ == '__main__':
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test_find_library()
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