def get_ssl_context(*args):
"""Create and return an SSLContext object."""
certfile, keyfile, passphrase, ca_certs, cert_reqs, crlfile = args
# Note PROTOCOL_SSLv23 is about the most misleading name imaginable.
# This configures the server and client to negotiate the
# highest protocol version they both support. A very good thing.
ctx = SSLContext(ssl.PROTOCOL_SSLv23)
if hasattr(ctx, "options"):
# Explicitly disable SSLv2 and SSLv3. Note that up to
# date versions of MongoDB 2.4 and above already do this,
# python disables SSLv2 by default in >= 2.7.7 and >= 3.3.4
# and SSLv3 in >= 3.4.3. There is no way for us to do this
# explicitly for python 2.6 or 2.7 before 2.7.9.
ctx.options |= getattr(ssl, "OP_NO_SSLv2", 0)
ctx.options |= getattr(ssl, "OP_NO_SSLv3", 0)
if certfile is not None:
if passphrase is not None:
vi = sys.version_info
# Since python just added a new parameter to an existing method
# this seems to be about the best we can do.
if (vi[0] == 2 and vi < (2, 7, 9) or vi[0] == 3 and vi <
(3, 3)):
raise ConfigurationError(
"Support for ssl_pem_passphrase requires "
"python 2.7.9+ (pypy 2.5.1+) or 3.3+")
ctx.load_cert_chain(certfile, keyfile, passphrase)
else:
ctx.load_cert_chain(certfile, keyfile)
if crlfile is not None:
if not hasattr(ctx, "verify_flags"):
raise ConfigurationError(
"Support for ssl_crlfile requires "
"python 2.7.9+ (pypy 2.5.1+) or 3.4+")
# Match the server's behavior.
ctx.verify_flags = ssl.VERIFY_CRL_CHECK_LEAF
ctx.load_verify_locations(crlfile)
if ca_certs is not None:
ctx.load_verify_locations(ca_certs)
elif cert_reqs != ssl.CERT_NONE:
# CPython >= 2.7.9 or >= 3.4.0, pypy >= 2.5.1
if hasattr(ctx, "load_default_certs"):
ctx.load_default_certs()
# Python >= 3.2.0, useless on Windows.
elif (sys.platform != "win32"
and hasattr(ctx, "set_default_verify_paths")):
ctx.set_default_verify_paths()
elif sys.platform == "win32" and HAVE_WINCERTSTORE:
with _WINCERTSLOCK:
if _WINCERTS is None:
_load_wincerts()
ctx.load_verify_locations(_WINCERTS.name)
elif HAVE_CERTIFI:
ctx.load_verify_locations(certifi.where())
else:
raise ConfigurationError(
"`ssl_cert_reqs` is not ssl.CERT_NONE and no system "
"CA certificates could be loaded. `ssl_ca_certs` is "
"required.")
ctx.verify_mode = ssl.CERT_REQUIRED if cert_reqs is None else cert_reqs
return ctx
def get_ssl_context(*args):
"""Create and return an SSLContext object."""
certfile, keyfile, passphrase, ca_certs, cert_reqs, crlfile = args
# Note PROTOCOL_SSLv23 is about the most misleading name imaginable.
# This configures the server and client to negotiate the
# highest protocol version they both support. A very good thing.
ctx = SSLContext(ssl.PROTOCOL_SSLv23)
if hasattr(ctx, "options"):
# Explicitly disable SSLv2 and SSLv3. Note that up to
# date versions of MongoDB 2.4 and above already do this,
# python disables SSLv2 by default in >= 2.7.7 and >= 3.3.4
# and SSLv3 in >= 3.4.3. There is no way for us to do this
# explicitly for python 2.6 or 2.7 before 2.7.9.
ctx.options |= getattr(ssl, "OP_NO_SSLv2", 0)
ctx.options |= getattr(ssl, "OP_NO_SSLv3", 0)
if certfile is not None:
if passphrase is not None:
vi = sys.version_info
# Since python just added a new parameter to an existing method
# this seems to be about the best we can do.
if (vi[0] == 2 and vi < (2, 7, 9) or
vi[0] == 3 and vi < (3, 3)):
raise ConfigurationError(
"Support for ssl_pem_passphrase requires "
"python 2.7.9+ (pypy 2.5.1+) or 3.3+")
ctx.load_cert_chain(certfile, keyfile, passphrase)
else:
ctx.load_cert_chain(certfile, keyfile)
if crlfile is not None:
if not hasattr(ctx, "verify_flags"):
raise ConfigurationError(
"Support for ssl_crlfile requires "
"python 2.7.9+ (pypy 2.5.1+) or 3.4+")
# Match the server's behavior.
ctx.verify_flags = ssl.VERIFY_CRL_CHECK_LEAF
ctx.load_verify_locations(crlfile)
if ca_certs is not None:
ctx.load_verify_locations(ca_certs)
elif cert_reqs != ssl.CERT_NONE:
# CPython >= 2.7.9 or >= 3.4.0, pypy >= 2.5.1
if hasattr(ctx, "load_default_certs"):
ctx.load_default_certs()
# Python >= 3.2.0, useless on Windows.
elif (sys.platform != "win32" and
hasattr(ctx, "set_default_verify_paths")):
ctx.set_default_verify_paths()
elif sys.platform == "win32" and HAVE_WINCERTSTORE:
with _WINCERTSLOCK:
if _WINCERTS is None:
_load_wincerts()
ctx.load_verify_locations(_WINCERTS.name)
elif HAVE_CERTIFI:
ctx.load_verify_locations(certifi.where())
else:
raise ConfigurationError(
"`ssl_cert_reqs` is not ssl.CERT_NONE and no system "
"CA certificates could be loaded. `ssl_ca_certs` is "
"required.")
ctx.verify_mode = ssl.CERT_REQUIRED if cert_reqs is None else cert_reqs
return ctx
def to_ssl_context(self):
# See https://docs.python.org/3.7/library/ssl.html#protocol-versions
from ssl import SSLContext, PROTOCOL_TLS_CLIENT, OP_NO_TLSv1, OP_NO_TLSv1_1, CERT_REQUIRED
ssl_context = SSLContext(PROTOCOL_TLS_CLIENT)
ssl_context.options |= OP_NO_TLSv1
ssl_context.options |= OP_NO_TLSv1_1
if self.verify_cert:
ssl_context.verify_mode = CERT_REQUIRED
ssl_context.set_default_verify_paths()
return ssl_context
def make_ssl_context(**config):
if config.get("encrypted") or config.get("secure"):
ssl_context = SSLContext(PROTOCOL_SSLv23)
ssl_context.options |= OP_NO_SSLv2
trust = config.get("trust", TRUST_DEFAULT)
if trust == TRUST_ALL_CERTIFICATES:
pass
elif trust == TRUST_CUSTOM_CA_SIGNED_CERTIFICATES:
raise NotImplementedError("Custom CA support is not implemented")
elif trust == TRUST_SYSTEM_CA_SIGNED_CERTIFICATES:
ssl_context.verify_mode = CERT_REQUIRED
else:
raise ValueError("Unknown trust mode")
ssl_context.set_default_verify_paths()
return ssl_context
else:
return None
def __get_ssl_context(cls, sslca=None):
"""Make an SSLConext for this Python version using public or sslca
"""
if ((version_info[0] == 2 and (version_info[1] >= 7 and version_info[2] >= 5)) or
(version_info[0] == 3 and version_info[1] >= 4)):
logger.debug('SSL method for 2.7.5+ / 3.4+')
# pylint: disable=no-name-in-module,import-outside-toplevel
from ssl import SSLContext, PROTOCOL_TLSv1_2, CERT_REQUIRED, OP_NO_COMPRESSION
ctx = SSLContext(PROTOCOL_TLSv1_2)
ctx.set_ciphers('HIGH:!SSLv3:!TLSv1:!aNULL:@STRENGTH')
# see CRIME security exploit
ctx.options |= OP_NO_COMPRESSION
# the following options are used to verify the identity of the broker
if sslca:
ctx.load_verify_locations(sslca)
ctx.verify_mode = CERT_REQUIRED
ctx.check_hostname = False
else:
# Verify public certifcates if sslca is None (default)
from ssl import Purpose # pylint: disable=no-name-in-module,import-outside-toplevel
ctx.load_default_certs(purpose=Purpose.SERVER_AUTH)
ctx.verify_mode = CERT_REQUIRED
ctx.check_hostname = True
elif version_info[0] == 3 and version_info[1] < 4:
logger.debug('Using SSL method for 3.2+, < 3.4')
# pylint: disable=no-name-in-module,import-outside-toplevel
from ssl import SSLContext, CERT_REQUIRED, PROTOCOL_SSLv23, OP_NO_SSLv2, OP_NO_SSLv3, OP_NO_TLSv1
ctx = SSLContext(PROTOCOL_SSLv23)
ctx.options |= (OP_NO_SSLv2 | OP_NO_SSLv3 | OP_NO_TLSv1)
ctx.set_ciphers('HIGH:!SSLv3:!TLSv1:!aNULL:@STRENGTH')
# the following options are used to verify the identity of the broker
if sslca:
ctx.load_verify_locations(sslca)
ctx.verify_mode = CERT_REQUIRED
else:
# Verify public certifcates if sslca is None (default)
ctx.set_default_verify_paths()
ctx.verify_mode = CERT_REQUIRED
else:
raise Exception("Unsupported Python version %s" % '.'.join(str(item) for item in version_info[:3]))
return ctx
def __get_ssl_context(cls, sslca=None):
"""Make an SSLConext for this Python version using public or sslca
"""
if ((version_info[0] == 2 and (version_info[1] >= 7 and version_info[2] >= 9)) or
(version_info[0] == 3 and version_info[1] >= 4)):
logger.debug('SSL method for 2.7.9+ / 3.4+')
# pylint: disable=no-name-in-module
from ssl import SSLContext, PROTOCOL_TLSv1_2, CERT_REQUIRED, OP_NO_COMPRESSION
ctx = SSLContext(PROTOCOL_TLSv1_2)
ctx.set_ciphers('HIGH:!SSLv3:!TLSv1:!aNULL:@STRENGTH')
# see CRIME security exploit
ctx.options |= OP_NO_COMPRESSION
# the following options are used to verify the identity of the broker
if sslca:
ctx.load_verify_locations(sslca)
ctx.verify_mode = CERT_REQUIRED
ctx.check_hostname = False
else:
# Verify public certifcates if sslca is None (default)
from ssl import Purpose # pylint: disable=no-name-in-module
ctx.load_default_certs(purpose=Purpose.SERVER_AUTH)
ctx.verify_mode = CERT_REQUIRED
ctx.check_hostname = True
elif version_info[0] == 3 and version_info[1] < 4:
logger.debug('Using SSL method for 3.2+, < 3.4')
# pylint: disable=no-name-in-module
from ssl import SSLContext, CERT_REQUIRED, PROTOCOL_SSLv23, OP_NO_SSLv2, OP_NO_SSLv3, OP_NO_TLSv1
ctx = SSLContext(PROTOCOL_SSLv23)
ctx.options |= (OP_NO_SSLv2 | OP_NO_SSLv3 | OP_NO_TLSv1)
ctx.set_ciphers('HIGH:!SSLv3:!TLSv1:!aNULL:@STRENGTH')
# the following options are used to verify the identity of the broker
if sslca:
ctx.load_verify_locations(sslca)
ctx.verify_mode = CERT_REQUIRED
else:
# Verify public certifcates if sslca is None (default)
ctx.set_default_verify_paths()
ctx.verify_mode = CERT_REQUIRED
else:
raise Exception("Unsupported Python version %s" % '.'.join(str(item) for item in version_info[:3]))
return ctx
def get_ssl_context(*args):
"""Create and return an SSLContext object."""
certfile, keyfile, ca_certs, cert_reqs = args
# Note PROTOCOL_SSLv23 is about the most misleading name imaginable.
# This configures the server and client to negotiate the
# highest protocol version they both support. A very good thing.
ctx = SSLContext(ssl.PROTOCOL_SSLv23)
if hasattr(ctx, "options"):
# Explicitly disable SSLv2 and SSLv3. Note that up to
# date versions of MongoDB 2.4 and above already do this,
# python disables SSLv2 by default in >= 2.7.7 and >= 3.3.4
# and SSLv3 in >= 3.4.3. There is no way for us to do this
# explicitly for python 2.6 or 2.7 before 2.7.9.
ctx.options |= getattr(ssl, "OP_NO_SSLv2", 0)
ctx.options |= getattr(ssl, "OP_NO_SSLv3", 0)
if certfile is not None:
ctx.load_cert_chain(certfile, keyfile)
if ca_certs is not None:
ctx.load_verify_locations(ca_certs)
elif cert_reqs != ssl.CERT_NONE:
# CPython >= 2.7.9 or >= 3.4.0, pypy >= 2.5.1
if hasattr(ctx, "load_default_certs"):
ctx.load_default_certs()
# Python >= 3.2.0, useless on Windows.
elif (sys.platform != "win32"
and hasattr(ctx, "set_default_verify_paths")):
ctx.set_default_verify_paths()
elif sys.platform == "win32" and HAVE_WINCERTSTORE:
with _WINCERTSLOCK:
if _WINCERTS is None:
_load_wincerts()
ctx.load_verify_locations(_WINCERTS.name)
elif HAVE_CERTIFI:
ctx.load_verify_locations(certifi.where())
else:
raise ConfigurationError(
"`ssl_cert_reqs` is not ssl.CERT_NONE and no system "
"CA certificates could be loaded. `ssl_ca_certs` is "
"required.")
ctx.verify_mode = ssl.CERT_REQUIRED if cert_reqs is None else cert_reqs
return ctx
def get_ssl_context(*args):
"""Create and return an SSLContext object."""
certfile, keyfile, ca_certs, cert_reqs = args
# Note PROTOCOL_SSLv23 is about the most misleading name imaginable.
# This configures the server and client to negotiate the
# highest protocol version they both support. A very good thing.
ctx = SSLContext(ssl.PROTOCOL_SSLv23)
if hasattr(ctx, "options"):
# Explicitly disable SSLv2 and SSLv3. Note that up to
# date versions of MongoDB 2.4 and above already do this,
# python disables SSLv2 by default in >= 2.7.7 and >= 3.3.4
# and SSLv3 in >= 3.4.3. There is no way for us to do this
# explicitly for python 2.6 or 2.7 before 2.7.9.
ctx.options |= getattr(ssl, "OP_NO_SSLv2", 0)
ctx.options |= getattr(ssl, "OP_NO_SSLv3", 0)
if certfile is not None:
ctx.load_cert_chain(certfile, keyfile)
if ca_certs is not None:
ctx.load_verify_locations(ca_certs)
elif cert_reqs != ssl.CERT_NONE:
# CPython >= 2.7.9 or >= 3.4.0, pypy >= 2.5.1
if hasattr(ctx, "load_default_certs"):
ctx.load_default_certs()
# Python >= 3.2.0, useless on Windows.
elif (sys.platform != "win32" and
hasattr(ctx, "set_default_verify_paths")):
ctx.set_default_verify_paths()
elif sys.platform == "win32" and HAVE_WINCERTSTORE:
with _WINCERTSLOCK:
if _WINCERTS is None:
_load_wincerts()
ctx.load_verify_locations(_WINCERTS.name)
elif HAVE_CERTIFI:
ctx.load_verify_locations(certifi.where())
else:
raise ConfigurationError(
"`ssl_cert_reqs` is not ssl.CERT_NONE and no system "
"CA certificates could be loaded. `ssl_ca_certs` is "
"required.")
ctx.verify_mode = ssl.CERT_REQUIRED if cert_reqs is None else cert_reqs
return ctx
def get_ssl_context(*args):
"""Create and return an SSLContext object."""
(certfile, keyfile, passphrase, ca_certs, cert_reqs, crlfile,
match_hostname) = args
verify_mode = ssl.CERT_REQUIRED if cert_reqs is None else cert_reqs
# Note PROTOCOL_SSLv23 is about the most misleading name imaginable.
# This configures the server and client to negotiate the
# highest protocol version they both support. A very good thing.
# PROTOCOL_TLS_CLIENT was added in CPython 3.6, deprecating
# PROTOCOL_SSLv23.
ctx = SSLContext(
getattr(ssl, "PROTOCOL_TLS_CLIENT", ssl.PROTOCOL_SSLv23))
# SSLContext.check_hostname was added in CPython 2.7.9 and 3.4.
# PROTOCOL_TLS_CLIENT (added in Python 3.6) enables it by default.
if hasattr(ctx, "check_hostname"):
if _PY37PLUS and verify_mode != ssl.CERT_NONE:
# Python 3.7 uses OpenSSL's hostname matching implementation
# making it the obvious version to start using this with.
# Python 3.6 might have been a good version, but it suffers
# from https://bugs.python.org/issue32185.
# We'll use our bundled match_hostname for older Python
# versions, which also supports IP address matching
# with Python < 3.5.
ctx.check_hostname = match_hostname
else:
ctx.check_hostname = False
if hasattr(ctx, "options"):
# Explicitly disable SSLv2, SSLv3 and TLS compression. Note that
# up to date versions of MongoDB 2.4 and above already disable
# SSLv2 and SSLv3, python disables SSLv2 by default in >= 2.7.7
# and >= 3.3.4 and SSLv3 in >= 3.4.3. There is no way for us to do
# any of this explicitly for python 2.6 or 2.7 before 2.7.9.
ctx.options |= getattr(ssl, "OP_NO_SSLv2", 0)
ctx.options |= getattr(ssl, "OP_NO_SSLv3", 0)
# OpenSSL >= 1.0.0
ctx.options |= getattr(ssl, "OP_NO_COMPRESSION", 0)
if certfile is not None:
try:
if passphrase is not None:
vi = sys.version_info
# Since python just added a new parameter to an existing method
# this seems to be about the best we can do.
if (vi[0] == 2 and vi < (2, 7, 9) or vi[0] == 3 and vi <
(3, 3)):
raise ConfigurationError(
"Support for ssl_pem_passphrase requires "
"python 2.7.9+ (pypy 2.5.1+) or 3.3+")
ctx.load_cert_chain(certfile, keyfile, passphrase)
else:
ctx.load_cert_chain(certfile, keyfile)
except ssl.SSLError as exc:
raise ConfigurationError(
"Private key doesn't match certificate: %s" % (exc, ))
if crlfile is not None:
if not hasattr(ctx, "verify_flags"):
raise ConfigurationError(
"Support for ssl_crlfile requires "
"python 2.7.9+ (pypy 2.5.1+) or 3.4+")
# Match the server's behavior.
ctx.verify_flags = ssl.VERIFY_CRL_CHECK_LEAF
ctx.load_verify_locations(crlfile)
if ca_certs is not None:
ctx.load_verify_locations(ca_certs)
elif cert_reqs != ssl.CERT_NONE:
# CPython >= 2.7.9 or >= 3.4.0, pypy >= 2.5.1
if hasattr(ctx, "load_default_certs"):
ctx.load_default_certs()
# Python >= 3.2.0, useless on Windows.
elif (sys.platform != "win32"
and hasattr(ctx, "set_default_verify_paths")):
ctx.set_default_verify_paths()
elif sys.platform == "win32" and HAVE_WINCERTSTORE:
with _WINCERTSLOCK:
if _WINCERTS is None:
_load_wincerts()
ctx.load_verify_locations(_WINCERTS.name)
elif HAVE_CERTIFI:
ctx.load_verify_locations(certifi.where())
else:
raise ConfigurationError(
"`ssl_cert_reqs` is not ssl.CERT_NONE and no system "
"CA certificates could be loaded. `ssl_ca_certs` is "
"required.")
ctx.verify_mode = verify_mode
return ctx
def get_ssl_context(*args):
"""Create and return an SSLContext object."""
certfile, keyfile, passphrase, ca_certs, cert_reqs, crlfile = args
# Note PROTOCOL_SSLv23 is about the most misleading name imaginable.
# This configures the server and client to negotiate the
# highest protocol version they both support. A very good thing.
# PROTOCOL_TLS_CLIENT was added in CPython 3.6, deprecating
# PROTOCOL_SSLv23.
ctx = SSLContext(
getattr(ssl, "PROTOCOL_TLS_CLIENT", ssl.PROTOCOL_SSLv23))
# SSLContext.check_hostname was added in CPython 2.7.9 and 3.4.
# PROTOCOL_TLS_CLIENT enables it by default. Using it
# requires passing server_hostname to wrap_socket, which we already
# do for SNI support. To support older versions of Python we have to
# call match_hostname directly, so we disable check_hostname explicitly
# to avoid calling match_hostname twice.
if hasattr(ctx, "check_hostname"):
ctx.check_hostname = False
if hasattr(ctx, "options"):
# Explicitly disable SSLv2, SSLv3 and TLS compression. Note that
# up to date versions of MongoDB 2.4 and above already disable
# SSLv2 and SSLv3, python disables SSLv2 by default in >= 2.7.7
# and >= 3.3.4 and SSLv3 in >= 3.4.3. There is no way for us to do
# any of this explicitly for python 2.6 or 2.7 before 2.7.9.
ctx.options |= getattr(ssl, "OP_NO_SSLv2", 0)
ctx.options |= getattr(ssl, "OP_NO_SSLv3", 0)
# OpenSSL >= 1.0.0
ctx.options |= getattr(ssl, "OP_NO_COMPRESSION", 0)
if certfile is not None:
try:
if passphrase is not None:
vi = sys.version_info
# Since python just added a new parameter to an existing method
# this seems to be about the best we can do.
if (vi[0] == 2 and vi < (2, 7, 9) or
vi[0] == 3 and vi < (3, 3)):
raise ConfigurationError(
"Support for ssl_pem_passphrase requires "
"python 2.7.9+ (pypy 2.5.1+) or 3.3+")
ctx.load_cert_chain(certfile, keyfile, passphrase)
else:
ctx.load_cert_chain(certfile, keyfile)
except ssl.SSLError as exc:
raise ConfigurationError(
"Private key doesn't match certificate: %s" % (exc,))
if crlfile is not None:
if not hasattr(ctx, "verify_flags"):
raise ConfigurationError(
"Support for ssl_crlfile requires "
"python 2.7.9+ (pypy 2.5.1+) or 3.4+")
# Match the server's behavior.
ctx.verify_flags = ssl.VERIFY_CRL_CHECK_LEAF
ctx.load_verify_locations(crlfile)
if ca_certs is not None:
ctx.load_verify_locations(ca_certs)
elif cert_reqs != ssl.CERT_NONE:
# CPython >= 2.7.9 or >= 3.4.0, pypy >= 2.5.1
if hasattr(ctx, "load_default_certs"):
ctx.load_default_certs()
# Python >= 3.2.0, useless on Windows.
elif (sys.platform != "win32" and
hasattr(ctx, "set_default_verify_paths")):
ctx.set_default_verify_paths()
elif sys.platform == "win32" and HAVE_WINCERTSTORE:
with _WINCERTSLOCK:
if _WINCERTS is None:
_load_wincerts()
ctx.load_verify_locations(_WINCERTS.name)
elif HAVE_CERTIFI:
ctx.load_verify_locations(certifi.where())
else:
raise ConfigurationError(
"`ssl_cert_reqs` is not ssl.CERT_NONE and no system "
"CA certificates could be loaded. `ssl_ca_certs` is "
"required.")
ctx.verify_mode = ssl.CERT_REQUIRED if cert_reqs is None else cert_reqs
return ctx
def get_ssl_context(*args):
"""Create and return an SSLContext object."""
(certfile,
keyfile,
passphrase,
ca_certs,
cert_reqs,
crlfile,
match_hostname) = args
verify_mode = ssl.CERT_REQUIRED if cert_reqs is None else cert_reqs
# Note PROTOCOL_SSLv23 is about the most misleading name imaginable.
# This configures the server and client to negotiate the
# highest protocol version they both support. A very good thing.
# PROTOCOL_TLS_CLIENT was added in CPython 3.6, deprecating
# PROTOCOL_SSLv23.
ctx = SSLContext(
getattr(ssl, "PROTOCOL_TLS_CLIENT", ssl.PROTOCOL_SSLv23))
# SSLContext.check_hostname was added in CPython 2.7.9 and 3.4.
# PROTOCOL_TLS_CLIENT (added in Python 3.6) enables it by default.
if hasattr(ctx, "check_hostname"):
if _PY37PLUS and verify_mode != ssl.CERT_NONE:
# Python 3.7 uses OpenSSL's hostname matching implementation
# making it the obvious version to start using this with.
# Python 3.6 might have been a good version, but it suffers
# from https://bugs.python.org/issue32185.
# We'll use our bundled match_hostname for older Python
# versions, which also supports IP address matching
# with Python < 3.5.
ctx.check_hostname = match_hostname
else:
ctx.check_hostname = False
if hasattr(ctx, "options"):
# Explicitly disable SSLv2, SSLv3 and TLS compression. Note that
# up to date versions of MongoDB 2.4 and above already disable
# SSLv2 and SSLv3, python disables SSLv2 by default in >= 2.7.7
# and >= 3.3.4 and SSLv3 in >= 3.4.3. There is no way for us to do
# any of this explicitly for python 2.7 before 2.7.9.
ctx.options |= getattr(ssl, "OP_NO_SSLv2", 0)
ctx.options |= getattr(ssl, "OP_NO_SSLv3", 0)
# OpenSSL >= 1.0.0
ctx.options |= getattr(ssl, "OP_NO_COMPRESSION", 0)
# Python 3.7+ with OpenSSL >= 1.1.0h
ctx.options |= getattr(ssl, "OP_NO_RENEGOTIATION", 0)
if certfile is not None:
try:
if passphrase is not None:
vi = sys.version_info
# Since python just added a new parameter to an existing method
# this seems to be about the best we can do.
if (vi[0] == 2 and vi < (2, 7, 9) or
vi[0] == 3 and vi < (3, 3)):
raise ConfigurationError(
"Support for ssl_pem_passphrase requires "
"python 2.7.9+ (pypy 2.5.1+) or 3.3+")
ctx.load_cert_chain(certfile, keyfile, passphrase)
else:
ctx.load_cert_chain(certfile, keyfile)
except ssl.SSLError as exc:
raise ConfigurationError(
"Private key doesn't match certificate: %s" % (exc,))
if crlfile is not None:
if not hasattr(ctx, "verify_flags"):
raise ConfigurationError(
"Support for ssl_crlfile requires "
"python 2.7.9+ (pypy 2.5.1+) or 3.4+")
# Match the server's behavior.
ctx.verify_flags = ssl.VERIFY_CRL_CHECK_LEAF
ctx.load_verify_locations(crlfile)
if ca_certs is not None:
ctx.load_verify_locations(ca_certs)
elif cert_reqs != ssl.CERT_NONE:
# CPython >= 2.7.9 or >= 3.4.0, pypy >= 2.5.1
if hasattr(ctx, "load_default_certs"):
ctx.load_default_certs()
# Python >= 3.2.0, useless on Windows.
elif (sys.platform != "win32" and
hasattr(ctx, "set_default_verify_paths")):
ctx.set_default_verify_paths()
elif sys.platform == "win32" and HAVE_WINCERTSTORE:
with _WINCERTSLOCK:
if _WINCERTS is None:
_load_wincerts()
ctx.load_verify_locations(_WINCERTS.name)
elif HAVE_CERTIFI:
ctx.load_verify_locations(certifi.where())
else:
raise ConfigurationError(
"`ssl_cert_reqs` is not ssl.CERT_NONE and no system "
"CA certificates could be loaded. `ssl_ca_certs` is "
"required.")
ctx.verify_mode = verify_mode
return ctx
