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Note: The Python Cryptographic Authority strongly suggests the use of pyca/cryptography_
where possible. If you are using pyOpenSSL for anything other than making a TLS connection
you should move to cryptography and drop your pyOpenSSL dependency.
High-level wrapper around a subset of the OpenSSL library. Includes
SSL.Connection objects, wrapping the methods of Python's portable sockets... and much more.
You can find more information in the documentation_. Development takes place on GitHub_.
If you run into bugs, you can file them in our issue tracker_.
We maintain a cryptography-dev_ mailing list for both user and development discussions.
You can also join #pyca on irc.libera.chat to ask questions or get involved.
.. _documentation: https://pyopenssl.org/
.. _issue tracker: https://github.com/pyca/pyopenssl/issues
.. _cryptography-dev: https://mail.python.org/mailman/listinfo/cryptography-dev
.. _GitHub: https://github.com/pyca/pyopenssl
.. _pyca/cryptography: https://github.com/pyca/cryptography
Backward-incompatible changes: ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Deprecations: ^^^^^^^^^^^^^
OpenSSL.SSL.Context after it
has been used to create an OpenSSL.SSL.Connection will emit a warning. In
a future release, this will raise an exception.Changes: ^^^^^^^^
cryptography maximum version has been increased to 45.0.x.Backward-incompatible changes: ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Deprecations: ^^^^^^^^^^^^^
Changes: ^^^^^^^^
Context.set_alpn_select_callback, Context.set_session_cache_mode, Context.set_options, Context.set_mode, X509.subject_name_hash, and X509Store.load_locations.warnings.deprecated. mypy will emit deprecation notices for them when used with --enable-error-code deprecated.Backward-incompatible changes: ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
OpenSSL.crypto.CRL, OpenSSL.crypto.Revoked, OpenSSL.crypto.dump_crl, and OpenSSL.crypto.load_crl. cryptography.x509's CRL functionality should be used instead.OpenSSL.crypto.sign and OpenSSL.crypto.verify. cryptography.hazmat.primitives.asymmetric's signature APIs should be used instead.Deprecations: ^^^^^^^^^^^^^
OpenSSL.rand - callers should use os.urandom() instead.add_extensions and get_extensions on OpenSSL.crypto.X509Req and OpenSSL.crypto.X509. These should have been deprecated at the same time X509Extension was. Users should use pyca/cryptography's X.509 APIs instead.OpenSSL.crypto.get_elliptic_curves and OpenSSL.crypto.get_elliptic_curve, as well as passing the reult of them to OpenSSL.SSL.Context.set_tmp_ecdh, users should instead pass curves from cryptography.X509 objects to OpenSSL.SSL.Context.use_certificate, OpenSSL.SSL.Connection.use_certificate, OpenSSL.SSL.Context.add_extra_chain_cert, and OpenSSL.SSL.Context.add_client_ca, users should instead pass cryptography.x509.Certificate instances. This is in preparation for deprecating pyOpenSSL's X509 entirely.PKey objects to OpenSSL.SSL.Context.use_privatekey and OpenSSL.SSL.Connection.use_privatekey, users should instead pass cryptography priate key instances. This is in preparation for deprecating pyOpenSSL's PKey entirely.Changes: ^^^^^^^^
cryptography maximum version has been increased to 44.0.x.OpenSSL.SSL.Connection.get_certificate, OpenSSL.SSL.Connection.get_peer_certificate, OpenSSL.SSL.Connection.get_peer_cert_chain, and OpenSSL.SSL.Connection.get_verified_chain now take an as_cryptography keyword-argument. When True is passed then cryptography.x509.Certificate are returned, instead of OpenSSL.crypto.X509. In the future, passing False (the default) will be deprecated.Backward-incompatible changes: ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Deprecations: ^^^^^^^^^^^^^
Changes: ^^^^^^^^
Backward-incompatible changes: ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Deprecations: ^^^^^^^^^^^^^
OpenSSL.crypto.X509Req, OpenSSL.crypto.load_certificate_request, OpenSSL.crypto.dump_certificate_request. Instead, cryptography.x509.CertificateSigningRequest, cryptography.x509.CertificateSigningRequestBuilder, cryptography.x509.load_der_x509_csr, or cryptography.x509.load_pem_x509_csr should be used.Changes: ^^^^^^^^
SSL module.
#1308 <https://github.com/pyca/pyopenssl/pull/1308>_.OpenSSL.crypto.PKey.from_cryptography_key to accept public and private EC, ED25519, ED448 keys.
#1310 <https://github.com/pyca/pyopenssl/pull/1310>_.Backward-incompatible changes: ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
OpenSSL.crypto.PKCS12 and
OpenSSL.crypto.NetscapeSPKI. OpenSSL.crypto.PKCS12 may be replaced
by the PKCS#12 APIs in the cryptography package.Deprecations: ^^^^^^^^^^^^^
Changes: ^^^^^^^^
Backward-incompatible changes: ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Deprecations: ^^^^^^^^^^^^^
Changes: ^^^^^^^^
OpenSSL.SSL.Connection.get_selected_srtp_profile to determine which SRTP profile was negotiated.
#1279 <https://github.com/pyca/pyopenssl/pull/1279>_.Backward-incompatible changes: ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
cryptography version is now 41.0.5.OpenSSL.crypto.load_pkcs7 and OpenSSL.crypto.load_pkcs12 which had been deprecated for 3 years.OpenSSL.SSL.OP_LEGACY_SERVER_CONNECT to allow legacy insecure renegotiation between OpenSSL and unpatched servers.
#1234 <https://github.com/pyca/pyopenssl/pull/1234>_.Deprecations: ^^^^^^^^^^^^^
OpenSSL.crypto.PKCS12 (which was intended to have been deprecated at the same time as OpenSSL.crypto.load_pkcs12).OpenSSL.crypto.NetscapeSPKI.OpenSSL.crypto.CRLOpenSSL.crypto.RevokedOpenSSL.crypto.load_crl and OpenSSL.crypto.dump_crlOpenSSL.crypto.sign and OpenSSL.crypto.verifyOpenSSL.crypto.X509ExtensionChanges: ^^^^^^^^
OpenSSL.crypto.X509Store.add_crl to also accept
cryptography's x509.CertificateRevocationList arguments in addition
to the now deprecated OpenSSL.crypto.CRL arguments.test_set_default_verify_paths test so that it is skipped if no
network connection is available.Backward-incompatible changes: ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
X509StoreFlags.NOTIFY_POLICY.
#1213 <https://github.com/pyca/pyopenssl/pull/1213>_.Deprecations: ^^^^^^^^^^^^^
Changes: ^^^^^^^^
cryptography maximum version has been increased to 41.0.x.OpenSSL.crypto.X509Req.set_version.X509VerificationCodes to OpenSSL.SSL.
#1202 <https://github.com/pyca/pyopenssl/pull/1202>_.Backward-incompatible changes: ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Deprecations: ^^^^^^^^^^^^^
Changes: ^^^^^^^^
X509Extension.get_short_name to raise an exception when no short name was known to OpenSSL.
#1204 <https://github.com/pyca/pyopenssl/pull/1204>_.Backward-incompatible changes: ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Deprecations: ^^^^^^^^^^^^^
Changes: ^^^^^^^^
cryptography maximum version has been increased to 40.0.x.OpenSSL.SSL.Connection.DTLSv1_get_timeout and OpenSSL.SSL.Connection.DTLSv1_handle_timeout
to support DTLS timeouts #1180 <https://github.com/pyca/pyopenssl/pull/1180>_.Backward-incompatible changes: ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Deprecations: ^^^^^^^^^^^^^
Changes: ^^^^^^^^
OpenSSL.SSL.X509StoreFlags.PARTIAL_CHAIN constant to allow for users
to perform certificate verification on partial certificate chains.
#1166 <https://github.com/pyca/pyopenssl/pull/1166>_cryptography maximum version has been increased to 39.0.x.Backward-incompatible changes: ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
cryptography version is now 38.0.x (and we now pin releases
against cryptography major versions to prevent future breakage)OpenSSL.crypto.X509StoreContextError exception has been refactored,
changing its internal attributes.
#1133 <https://github.com/pyca/pyopenssl/pull/1133>_Deprecations: ^^^^^^^^^^^^^
OpenSSL.SSL.SSLeay_version is deprecated in favor of
OpenSSL.SSL.OpenSSL_version. The constants OpenSSL.SSL.SSLEAY_* are
deprecated in favor of OpenSSL.SSL.OPENSSL_*.Changes: ^^^^^^^^
OpenSSL.SSL.Connection.set_verify and OpenSSL.SSL.Connection.get_verify_mode
to override the context object's verification flags.
#1073 <https://github.com/pyca/pyopenssl/pull/1073>_OpenSSL.SSL.Connection.use_certificate and OpenSSL.SSL.Connection.use_privatekey
to set a certificate per connection (and not just per context) #1121 <https://github.com/pyca/pyopenssl/pull/1121>_.Backward-incompatible changes: ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
#1047 <https://github.com/pyca/pyopenssl/pull/1047>_cryptography version is now 35.0.Deprecations: ^^^^^^^^^^^^^
Changes: ^^^^^^^^
DTLS <https://en.wikipedia.org/wiki/Datagram_Transport_Layer_Security>_
primitives. #1026 <https://github.com/pyca/pyopenssl/pull/1026>_Backward-incompatible changes: ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
cryptography version is now 3.3.Deprecations: ^^^^^^^^^^^^^
Changes: ^^^^^^^^
#993 <https://github.com/pyca/pyopenssl/pull/993>_OpenSSL.SSL.Context.set_min_proto_version and OpenSSL.SSL.Context.set_max_proto_version
to set the minimum and maximum supported TLS version #985 <https://github.com/pyca/pyopenssl/pull/985>_.to_cryptography and from_cryptography methods to support an upcoming release of cryptography without raising deprecation warnings.
#1030 <https://github.com/pyca/pyopenssl/pull/1030>_Backward-incompatible changes: ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Deprecations: ^^^^^^^^^^^^^
Changes: ^^^^^^^^
Backward-incompatible changes: ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
cryptography version is now 3.2.OpenSSL.tsafe module.OpenSSL.SSL.Context.set_npn_advertise_callback, OpenSSL.SSL.Context.set_npn_select_callback, and OpenSSL.SSL.Connection.get_next_proto_negotiated.Deprecations: ^^^^^^^^^^^^^
OpenSSL.crypto.load_pkcs7 and OpenSSL.crypto.load_pkcs12.Changes: ^^^^^^^^
chain parameter to OpenSSL.crypto.X509StoreContext()
where additional untrusted certificates can be specified to help chain building.
#948 <https://github.com/pyca/pyopenssl/pull/948>_OpenSSL.crypto.X509Store.load_locations to set trusted
certificate file bundles and/or directories for verification.
#943 <https://github.com/pyca/pyopenssl/pull/943>_Context.set_keylog_callback to log key material.
#910 <https://github.com/pyca/pyopenssl/pull/910>_OpenSSL.SSL.Connection.get_verified_chain to retrieve the
verified certificate chain of the peer.
#894 <https://github.com/pyca/pyopenssl/pull/894>_.Context.set_verify.
If omitted, OpenSSL's default verification is used.
#933 <https://github.com/pyca/pyopenssl/pull/933>_OpenSSL.crypto.load_privatekey
and OpenSSL.crypto.dump_privatekey.
#947 <https://github.com/pyca/pyopenssl/pull/947>_Backward-incompatible changes: ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
ContextType, ConnectionType, PKeyType, X509NameType, X509ReqType, X509Type, X509StoreType, CRLType, PKCS7Type, PKCS12Type, and NetscapeSPKIType aliases.
Use the classes without the Type suffix instead.
#814 <https://github.com/pyca/pyopenssl/pull/814>_cryptography version is now 2.8 due to issues on macOS with a transitive dependency.
#875 <https://github.com/pyca/pyopenssl/pull/875>_Deprecations: ^^^^^^^^^^^^^
OpenSSL.SSL.Context.set_npn_advertise_callback, OpenSSL.SSL.Context.set_npn_select_callback, and OpenSSL.SSL.Connection.get_next_proto_negotiated.
ALPN should be used instead.
#820 <https://github.com/pyca/pyopenssl/pull/820>_Changes: ^^^^^^^^
bytearray in SSL.Connection.send() by using cffi's from_buffer.
#852 <https://github.com/pyca/pyopenssl/pull/852>_OpenSSL.SSL.Context.set_alpn_select_callback can return a new NO_OVERLAPPING_PROTOCOLS sentinel value
to allow a TLS handshake to complete without an application protocol.Full changelog <https://pyopenssl.org/en/stable/changelog.html>_.
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Python wrapper module around the OpenSSL library
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