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