220 lines
8.7 KiB
Python
Executable File
220 lines
8.7 KiB
Python
Executable File
#! python
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import sys
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#Only really old versions of Python don't have sys.hexversion. We don't support
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#them. The logging module was introduced in Python 2.3
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if not hasattr(sys, 'hexversion') or sys.hexversion < 0x20300F0:
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sys.stdout.write('Python version: ' + sys.version)
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sys.stdout.write('PyBitmessage requires Python 2.7.3 or greater (but not Python 3)')
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sys.exit()
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#We can now use logging so set up a simple configuration
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import logging
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formatter = logging.Formatter(
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'%(levelname)s: %(message)s'
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)
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handler = logging.StreamHandler(sys.stdout)
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handler.setFormatter(formatter)
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logger = logging.getLogger(__name__)
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logger.addHandler(handler)
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logger.setLevel(logging.ERROR)
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#We need to check hashlib for RIPEMD-160, as it won't be available if OpenSSL is
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#not linked against or the linked OpenSSL has RIPEMD disabled.
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def check_hashlib():
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if sys.hexversion < 0x020500F0:
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logger.error('The hashlib module is not included in this version of Python.')
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return False
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import hashlib
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if '_hashlib' not in hashlib.__dict__:
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logger.error('The RIPEMD-160 hash algorithm is not available. The hashlib module is not linked against OpenSSL.')
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return False
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try:
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hashlib.new('ripemd160')
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except ValueError:
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logger.error('The RIPEMD-160 hash algorithm is not available. The hashlib module utilizes an OpenSSL library with RIPEMD disabled.')
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return False
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return True
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def check_sqlite():
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if sys.hexversion < 0x020500F0:
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logger.error('The sqlite3 module is not included in this version of Python.')
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return False
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try:
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import sqlite3
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except ImportError:
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logger.error('The sqlite3 module is not available')
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return False
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logger.info('sqlite3 Module Version: ' + sqlite3.version)
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logger.info('SQLite Library Version: ' + sqlite3.sqlite_version)
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#sqlite_version_number formula: https://sqlite.org/c3ref/c_source_id.html
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sqlite_version_number = sqlite3.sqlite_version_info[0] * 1000000 + sqlite3.sqlite_version_info[1] * 1000 + sqlite3.sqlite_version_info[2]
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conn = None
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try:
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try:
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conn = sqlite3.connect(':memory:')
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if sqlite_version_number >= 3006018:
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sqlite_source_id = conn.execute('SELECT sqlite_source_id();').fetchone()[0]
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logger.info('SQLite Library Source ID: ' + sqlite_source_id)
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if sqlite_version_number >= 3006023:
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compile_options = ', '.join(map(lambda row: row[0], conn.execute('PRAGMA compile_options;')))
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logger.info('SQLite Library Compile Options: ' + compile_options)
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#There is no specific version requirement as yet, so we just use the
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#first version that was included with Python.
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if sqlite_version_number < 3000008:
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logger.error('This version of SQLite is too old. PyBitmessage requires SQLite 3.0.8 or later')
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return False
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return True
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except sqlite3.Error:
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logger.exception('An exception occured while checking sqlite.')
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return False
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finally:
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if conn:
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conn.close()
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def check_openssl():
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try:
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import ctypes
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except ImportError:
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logger.error('Unable to check OpenSSL. The ctypes module is not available.')
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return False
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#We need to emulate the way PyElliptic searches for OpenSSL.
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if sys.platform == 'win32':
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paths = ['libeay32.dll']
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if getattr(sys, 'frozen', False):
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import os.path
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paths.insert(0, os.path.join(sys._MEIPASS, 'libeay32.dll'))
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else:
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paths = ['libcrypto.so']
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if sys.platform == 'darwin':
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paths.extend([
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'libcrypto.dylib',
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'/usr/local/opt/openssl/lib/libcrypto.dylib',
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'./../Frameworks/libcrypto.dylib'
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])
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import re
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if re.match(r'linux|darwin|freebsd', sys.platform):
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try:
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import ctypes.util
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path = ctypes.util.find_library('ssl')
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if path not in paths:
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paths.append(path)
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except:
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pass
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SSLEAY_VERSION = 0
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SSLEAY_CFLAGS = 2
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cflags_regex = re.compile(r'(?:OPENSSL_NO_)(AES|EC|ECDH|ECDSA)(?!\w)')
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for path in paths:
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logger.info('Checking OpenSSL at ' + path)
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try:
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library = ctypes.CDLL(path)
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except OSError:
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continue
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logger.info('OpenSSL Name: ' + library._name)
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try:
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library.SSLeay.restype = ctypes.c_long
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library.SSLeay_version.restype = ctypes.c_char_p
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library.SSLeay_version.argtypes = [ctypes.c_int]
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except AttributeError:
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logger.error('Cannot determine version of this OpenSSL library.')
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return False
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logger.info('OpenSSL Version: ' + library.SSLeay_version(SSLEAY_VERSION))
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compile_options = library.SSLeay_version(SSLEAY_CFLAGS)
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logger.info('OpenSSL Compile Options: ' + compile_options)
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openssl_hexversion = library.SSLeay()
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#PyElliptic uses EVP_CIPHER_CTX_new and EVP_CIPHER_CTX_free which were
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#introduced in 0.9.8b.
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if openssl_hexversion < 0x90802F:
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logger.error('This OpenSSL library is too old. PyBitmessage requires OpenSSL 0.9.8b or later with AES, Elliptic Curves (EC), ECDH, and ECDSA enabled.')
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return False
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matches = cflags_regex.findall(compile_options)
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if len(matches) > 0:
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logger.error('This OpenSSL library is missing the following required features: ' + ', '.join(matches) + '. PyBitmessage requires OpenSSL 0.9.8b or later with AES, Elliptic Curves (EC), ECDH, and ECDSA enabled.')
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return False
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return True
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return False
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#TODO: The minimum versions of pythondialog and dialog need to be determined
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def check_curses():
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if sys.hexversion < 0x20600F0:
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logger.error('The curses interface requires the pythondialog package and the dialog utility.')
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return False
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try:
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import curses
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except ImportError:
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logger.error('The curses interface can not be used. The curses module is not available.')
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return False
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logger.info('curses Module Version: ' + curses.version)
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try:
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import dialog
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except ImportError:
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logger.error('The curses interface can not be used. The pythondialog package is not available.')
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return False
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logger.info('pythondialog Package Version: ' + dialog.__version__)
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dialog_util_version = dialog.Dialog().cached_backend_version
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#The pythondialog author does not like Python2 str, so we have to use
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#unicode for just the version otherwise we get the repr form which includes
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#the module and class names along with the actual version.
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logger.info('dialog Utility Version' + unicode(dialog_util_version))
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return True
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def check_pyqt():
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try:
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import PyQt4.QtCore
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except ImportError:
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logger.error('The PyQt4 package is not available. PyBitmessage requires PyQt 4.8 or later and Qt 4.7 or later.')
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return False
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logger.info('PyQt Version: ' + PyQt4.QtCore.PYQT_VERSION_STR)
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logger.info('Qt Version: ' + PyQt4.QtCore.QT_VERSION_STR)
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passed = True
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if PyQt4.QtCore.PYQT_VERSION < 0x40800:
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logger.error('This version of PyQt is too old. PyBitmessage requries PyQt 4.8 or later.')
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passed = False
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if PyQt4.QtCore.QT_VERSION < 0x40700:
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logger.error('This version of Qt is too old. PyBitmessage requries Qt 4.7 or later.')
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passed = False
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return passed
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def check_dependencies(verbose = False, optional = False):
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if verbose:
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logger.setLevel(logging.INFO)
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has_all_dependencies = True
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#Python 2.7.3 is the required minimum. Python 3+ is not supported, but it is
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#still useful to provide information about our other requirements.
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logger.info('Python version: %s', sys.version)
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if sys.hexversion < 0x20703F0:
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logger.error('PyBitmessage requires Python 2.7.3 or greater (but not Python 3+)')
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has_all_dependencies = False
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if sys.hexversion >= 0x3000000:
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logger.error('PyBitmessage does not support Python 3+. Python 2.7.3 or greater is required.')
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has_all_dependencies = False
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check_functions = [check_hashlib, check_sqlite, check_openssl]
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if optional:
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check_functions.extend([check_pyqt, check_curses])
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#Unexpected exceptions are handled here
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for check in check_functions:
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try:
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has_all_dependencies &= check()
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except:
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logger.exception(check.__name__ + ' failed unexpectedly.')
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has_all_dependencies = False
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if not has_all_dependencies:
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logger.critical('PyBitmessage cannot start. One or more dependencies are unavailable.')
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sys.exit()
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if __name__ == '__main__':
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check_dependencies(True, True)
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