3.3.2:
SECURITY ISSUE: Fixed a bug where certain sequences of update() calls when symmetrically encrypting very large payloads (>2GB) could result in an integer overflow, leading to buffer overflows. CVE-2020-36242
3.3.1:
* Re-added a legacy symbol causing problems for older ``pyOpenSSL`` users.
3.3:
* **BACKWARDS INCOMPATIBLE:** Support for Python 3.5 has been removed due to
low usage and maintenance burden.
* **BACKWARDS INCOMPATIBLE:** The
:class:`~cryptography.hazmat.primitives.ciphers.modes.GCM` and
:class:`~cryptography.hazmat.primitives.ciphers.aead.AESGCM` now require
64-bit to 1024-bit (8 byte to 128 byte) initialization vectors. This change
is to conform with an upcoming OpenSSL release that will no longer support
sizes outside this window.
* **BACKWARDS INCOMPATIBLE:** When deserializing asymmetric keys we now
raise ``ValueError`` rather than ``UnsupportedAlgorithm`` when an
unsupported cipher is used. This change is to conform with an upcoming
OpenSSL release that will no longer distinguish between error types.
* **BACKWARDS INCOMPATIBLE:** We no longer allow loading of finite field
Diffie-Hellman parameters of less than 512 bits in length. This change is to
conform with an upcoming OpenSSL release that no longer supports smaller
sizes. These keys were already wildly insecure and should not have been used
in any application outside of testing.
* Updated Windows, macOS, and ``manylinux`` wheels to be compiled with
OpenSSL 1.1.1i.
* Python 2 support is deprecated in ``cryptography``. This is the last release
that will support Python 2.
* Added the
:meth:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPublicKey.recover_data_from_signature`
function to
:class:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPublicKey`
for recovering the signed data from an RSA signature.
3.2.1 - 2020-10-27
Disable blinding on RSA public keys to address an error with some versions of OpenSSL.
3.2 - 2020-10-25
SECURITY ISSUE: Attempted to make RSA PKCS#1v1.5 decryption more constant time, to protect against Bleichenbacher vulnerabilities. Due to limitations imposed by our API, we cannot completely mitigate this vulnerability and a future release will contain a new API which is designed to be resilient to these for contexts where it is required. Credit to Hubert Kario for reporting the issue. CVE-2020-25659
Support for OpenSSL 1.0.2 has been removed. Users on older version of OpenSSL will need to upgrade.
Added basic support for PKCS7 signing (including SMIME) via :class:`~cryptography.hazmat.primitives.serialization.pkcs7.PKCS7SignatureBuilder`.
3.1.1 - 2020-09-22
Updated Windows, macOS, and manylinux wheels to be compiled with OpenSSL 1.1.1h.
3.1 - 2020-08-26
BACKWARDS INCOMPATIBLE: Removed support for idna based :term:`U-label` parsing in various X.509 classes. This support was originally deprecated in version 2.1 and moved to an extra in 2.5.
Deprecated OpenSSL 1.0.2 support. OpenSSL 1.0.2 is no longer supported by the OpenSSL project. The next version of cryptography will drop support for it.
Deprecated support for Python 3.5. This version sees very little use and will be removed in the next release.
backend arguments to functions are no longer required and the default backend will automatically be selected if no backend is provided.
Added initial support for parsing certificates from PKCS7 files with :func:`~cryptography.hazmat.primitives.serialization.pkcs7.load_pem_pkcs7_certificates` and :func:`~cryptography.hazmat.primitives.serialization.pkcs7.load_der_pkcs7_certificates` .
Calling update or update_into on :class:`~cryptography.hazmat.primitives.ciphers.CipherContext` with data longer than 231 bytes no longer raises an OverflowError. This also resolves the same issue in :doc:`/fernet`.
3.0 - 2020-07-20
BACKWARDS INCOMPATIBLE: Removed support for passing an :class:`~cryptography.x509.Extension` instance to :meth:`~cryptography.x509.AuthorityKeyIdentifier.from_issuer_subject_key_identifier`, as per our deprecation policy.
BACKWARDS INCOMPATIBLE: Support for LibreSSL 2.7.x, 2.8.x, and 2.9.0 has been removed (2.9.1+ is still supported).
BACKWARDS INCOMPATIBLE: Dropped support for macOS 10.9, macOS users must upgrade to 10.10 or newer.
BACKWARDS INCOMPATIBLE: RSA :meth:`~cryptography.hazmat.primitives.asymmetric.rsa.generate_private_key` no longer accepts public_exponent values except 65537 and 3 (the latter for legacy purposes).
BACKWARDS INCOMPATIBLE: X.509 certificate parsing now enforces that the version field contains a valid value, rather than deferring this check until :attr:`~cryptography.x509.Certificate.version` is accessed.
Deprecated support for Python 2. At the time there is no time table for actually dropping support, however we strongly encourage all users to upgrade their Python, as Python 2 no longer receives support from the Python core team.
If you have trouble suppressing this warning in tests view the :ref:`FAQ entry addressing this issue <faq-howto-handle-deprecation-warning>`.
Added support for OpenSSH serialization format for ec, ed25519, rsa and dsa private keys: :func:`~cryptography.hazmat.primitives.serialization.load_ssh_private_key` for loading and :attr:`~cryptography.hazmat.primitives.serialization.PrivateFormat.OpenSSH` for writing.
Added support for OpenSSH certificates to :func:`~cryptography.hazmat.primitives.serialization.load_ssh_public_key`.
Added :meth:`~cryptography.fernet.Fernet.encrypt_at_time` and :meth:`~cryptography.fernet.Fernet.decrypt_at_time` to :class:`~cryptography.fernet.Fernet`.
Added support for the :class:`~cryptography.x509.SubjectInformationAccess` X.509 extension.
Added support for parsing :class:`~cryptography.x509.SignedCertificateTimestamps` in OCSP responses.
Added support for parsing attributes in certificate signing requests via :meth:`~cryptography.x509.CertificateSigningRequest.get_attribute_for_oid`.
Added support for encoding attributes in certificate signing requests via :meth:`~cryptography.x509.CertificateSigningRequestBuilder.add_attribute`.
On OpenSSL 1.1.1d and higher cryptography now uses OpenSSL's built-in CSPRNG instead of its own OS random engine because these versions of OpenSSL properly reseed on fork.
Added initial support for creating PKCS12 files with :func:`~cryptography.hazmat.primitives.serialization.pkcs12.serialize_key_and_certificates`.
2.9:
* **BACKWARDS INCOMPATIBLE:** Support for Python 3.4 has been removed due to
low usage and maintenance burden.
* **BACKWARDS INCOMPATIBLE:** Support for OpenSSL 1.0.1 has been removed.
Users on older version of OpenSSL will need to upgrade.
* **BACKWARDS INCOMPATIBLE:** Support for LibreSSL 2.6.x has been removed.
* Removed support for calling
:meth:`~cryptography.hazmat.primitives.asymmetric.x25519.X25519PublicKey.public_bytes`
with no arguments, as per our deprecation policy. You must now pass
``encoding`` and ``format``.
* **BACKWARDS INCOMPATIBLE:** Reversed the order in which
:meth:`~cryptography.x509.Name.rfc4514_string` returns the RDNs
as required by :rfc:`4514`.
* Updated Windows, macOS, and ``manylinux`` wheels to be compiled with
OpenSSL 1.1.1f.
* Added support for parsing
:attr:`~cryptography.x509.ocsp.OCSPResponse.single_extensions` in an OCSP
response.
* :class:`~cryptography.x509.NameAttribute` values can now be empty strings.
2.8:
* Updated Windows, macOS, and ``manylinux1`` wheels to be compiled with
OpenSSL 1.1.1d.
* Added support for Python 3.8.
* Added class methods
:meth:`Poly1305.generate_tag
<cryptography.hazmat.primitives.poly1305.Poly1305.generate_tag>`
and
:meth:`Poly1305.verify_tag
<cryptography.hazmat.primitives.poly1305.Poly1305.verify_tag>`
for Poly1305 sign and verify operations.
* Deprecated support for OpenSSL 1.0.1. Support will be removed in
``cryptography`` 2.9.
* We now ship ``manylinux2010`` wheels in addition to our ``manylinux1``
wheels.
* Added support for ``ed25519`` and ``ed448`` keys in the
:class:`~cryptography.x509.CertificateBuilder`,
:class:`~cryptography.x509.CertificateSigningRequestBuilder`,
:class:`~cryptography.x509.CertificateRevocationListBuilder` and
:class:`~cryptography.x509.ocsp.OCSPResponseBuilder`.
* ``cryptography`` no longer depends on ``asn1crypto``.
* :class:`~cryptography.x509.FreshestCRL` is now allowed as a
:class:`~cryptography.x509.CertificateRevocationList` extension.
2.7:
BACKWARDS INCOMPATIBLE: We no longer distribute 32-bit manylinux1 wheels. Continuing to produce them was a maintenance burden.
BACKWARDS INCOMPATIBLE: Removed the cryptography.hazmat.primitives.mac.MACContext interface. The CMAC and HMAC APIs have not changed, but they are no longer registered as MACContext instances.
Updated Windows, macOS, and manylinux1 wheels to be compiled with OpenSSL 1.1.1c.
Removed support for running our tests with setup.py test. Users interested in running our tests can continue to follow the directions in our :doc:development documentation</development/getting-started>.
Add support for :class:~cryptography.hazmat.primitives.poly1305.Poly1305 when using OpenSSL 1.1.1 or newer.
Support serialization with Encoding.OpenSSH and PublicFormat.OpenSSH in :meth:Ed25519PublicKey.public_bytes <cryptography.hazmat.primitives.asymmetric.ed25519.Ed25519PublicKey.public_bytes> .
Correctly allow passing a SubjectKeyIdentifier to :meth:~cryptography.x509.AuthorityKeyIdentifier.from_issuer_subject_key_identifier and deprecate passing an Extension object. The documentation always required SubjectKeyIdentifier but the implementation previously required an Extension.
2.6.1:
* Resolved an error in our build infrastructure that broke our Python3 wheels
for macOS and Linux.
2.6:
* **BACKWARDS INCOMPATIBLE:** Removed
cryptography.hazmat.primitives.asymmetric.utils.encode_rfc6979_signature
and
cryptography.hazmat.primitives.asymmetric.utils.decode_rfc6979_signature,
which had been deprecated for nearly 4 years. Use
:func:~cryptography.hazmat.primitives.asymmetric.utils.encode_dss_signature
and
:func:~cryptography.hazmat.primitives.asymmetric.utils.decode_dss_signature
instead.
* **BACKWARDS INCOMPATIBLE**: Removed cryptography.x509.Certificate.serial,
which had been deprecated for nearly 3 years. Use
:attr:~cryptography.x509.Certificate.serial_number instead.
* Updated Windows, macOS, and manylinux1 wheels to be compiled with
OpenSSL 1.1.1b.
* Added support for :doc:/hazmat/primitives/asymmetric/ed448 when using
OpenSSL 1.1.1b or newer.
* Added support for :doc:/hazmat/primitives/asymmetric/ed25519 when using
OpenSSL 1.1.1b or newer.
* :func:~cryptography.hazmat.primitives.serialization.load_ssh_public_key can
now load ed25519 public keys.
* Add support for easily mapping an object identifier to its elliptic curve
class via
:func:~cryptography.hazmat.primitives.asymmetric.ec.get_curve_for_oid.
* Add support for OpenSSL when compiled with the no-engine
(OPENSSL_NO_ENGINE) flag.
2.5:
* **BACKWARDS INCOMPATIBLE:** :term:U-label strings were deprecated in
version 2.1, but this version removes the default idna dependency as
well. If you still need this deprecated path please install cryptography
with the idna extra: pip install cryptography[idna].
* **BACKWARDS INCOMPATIBLE:** The minimum supported PyPy version is now 5.4.
* Numerous classes and functions have been updated to allow :term:bytes-like
types for keying material and passwords, including symmetric algorithms, AEAD
ciphers, KDFs, loading asymmetric keys, and one time password classes.
* Updated Windows, macOS, and manylinux1 wheels to be compiled with
OpenSSL 1.1.1a.
* Added support for :class:~cryptography.hazmat.primitives.hashes.SHA512_224
and :class:~cryptography.hazmat.primitives.hashes.SHA512_256 when using
OpenSSL 1.1.1.
* Added support for :class:~cryptography.hazmat.primitives.hashes.SHA3_224,
:class:~cryptography.hazmat.primitives.hashes.SHA3_256,
:class:~cryptography.hazmat.primitives.hashes.SHA3_384, and
:class:~cryptography.hazmat.primitives.hashes.SHA3_512 when using OpenSSL
1.1.1.
* Added support for :doc:/hazmat/primitives/asymmetric/x448 when using
OpenSSL 1.1.1.
* Added support for :class:~cryptography.hazmat.primitives.hashes.SHAKE128
and :class:~cryptography.hazmat.primitives.hashes.SHAKE256 when using
OpenSSL 1.1.1.
* Added initial support for parsing PKCS12 files with
:func:~cryptography.hazmat.primitives.serialization.pkcs12.load_key_and_certificates.
* Added support for :class:~cryptography.x509.IssuingDistributionPoint.
* Added rfc4514_string() method to
:meth:x509.Name <cryptography.x509.Name.rfc4514_string>,
:meth:x509.RelativeDistinguishedName
<cryptography.x509.RelativeDistinguishedName.rfc4514_string>, and
:meth:x509.NameAttribute <cryptography.x509.NameAttribute.rfc4514_string>
to format the name or component an :rfc:4514 Distinguished Name string.
* Added
:meth:~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePublicKey.from_encoded_point,
which immediately checks if the point is on the curve and supports compressed
points. Deprecated the previous method
:meth:~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePublicNumbers.from_encoded_point.
* Added :attr:~cryptography.x509.ocsp.OCSPResponse.signature_hash_algorithm
to OCSPResponse.
* Updated :doc:/hazmat/primitives/asymmetric/x25519 support to allow
additional serialization methods. Calling
:meth:~cryptography.hazmat.primitives.asymmetric.x25519.X25519PublicKey.public_bytes
with no arguments has been deprecated.
* Added support for encoding compressed and uncompressed points via
:meth:~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePublicKey.public_bytes. Deprecated the previous method
:meth:~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePublicNumbers.encode_point.
2.4.1:
Fixed a build breakage in our manylinux1 wheels.
2.4:
BACKWARDS INCOMPATIBLE: Dropped support for LibreSSL 2.4.x.
Deprecated OpenSSL 1.0.1 support. OpenSSL 1.0.1 is no longer supported by the OpenSSL project. At this time there is no time table for dropping support, however we strongly encourage all users to upgrade or install cryptography from a wheel.
Added initial :doc:OCSP </x509/ocsp> support.
Added support for :class:~cryptography.x509.PrecertPoison.
2.3:
SECURITY ISSUE: :meth:~cryptography.hazmat.primitives.ciphers.AEADDecryptionContext.finalize_with_tag allowed tag truncation by default which can allow tag forgery in some cases. The method now enforces the min_tag_length provided to the :class:~cryptography.hazmat.primitives.ciphers.modes.GCM constructor. CVE-2018-10903
Added support for Python 3.7.
Added :meth:~cryptography.fernet.Fernet.extract_timestamp to get the authenticated timestamp of a :doc:Fernet </fernet> token.
Support for Python 2.7.x without hmac.compare_digest has been deprecated. We will require Python 2.7.7 or higher (or 2.7.6 on Ubuntu) in the next cryptography release.
Fixed multiple issues preventing cryptography from compiling against LibreSSL 2.7.x.
Added :class:~cryptography.x509.CertificateRevocationList.get_revoked_certificate_by_serial_number for quick serial number searches in CRLs.
The :class:~cryptography.x509.RelativeDistinguishedName class now preserves the order of attributes. Duplicate attributes now raise an error instead of silently discarding duplicates.
:func:~cryptography.hazmat.primitives.keywrap.aes_key_unwrap and :func:~cryptography.hazmat.primitives.keywrap.aes_key_unwrap_with_padding now raise :class:~cryptography.hazmat.primitives.keywrap.InvalidUnwrap if the wrapped key is an invalid length, instead of ValueError.
2.2.1:
Reverted a change to GeneralNames which prohibited having zero elements, due to breakages.
Fixed a bug in :func:~cryptography.hazmat.primitives.keywrap.aes_key_unwrap_with_padding that caused it to raise InvalidUnwrap when key length modulo 8 was zero.
2.2:
BACKWARDS INCOMPATIBLE: Support for Python 2.6 has been dropped.
Resolved a bug in HKDF that incorrectly constrained output size.
Added :class:~cryptography.hazmat.primitives.asymmetric.ec.BrainpoolP256R1, :class:~cryptography.hazmat.primitives.asymmetric.ec.BrainpoolP384R1, and :class:~cryptography.hazmat.primitives.asymmetric.ec.BrainpoolP512R1 to support inter-operating with systems like German smart meters.
Added token rotation support to :doc:Fernet </fernet> with :meth:~cryptography.fernet.MultiFernet.rotate.
Fixed a memory leak in :func:~cryptography.hazmat.primitives.asymmetric.ec.derive_private_key.
Added support for AES key wrapping with padding via :func:~cryptography.hazmat.primitives.keywrap.aes_key_wrap_with_padding and :func:~cryptography.hazmat.primitives.keywrap.aes_key_unwrap_with_padding .
Allow loading DSA keys with 224 bit q.
2.1:
FINAL DEPRECATION Python 2.6 support is deprecated, and will be removed in the next release of cryptography.
BACKWARDS INCOMPATIBLE: Whirlpool, RIPEMD160, and UnsupportedExtension have been removed in accordance with our :doc:`/api-stability` policy.
BACKWARDS INCOMPATIBLE: :attr:`~cryptography.x509.DNSName.value`, :attr:`~cryptography.x509.RFC822Name.value`, and :attr:`~cryptography.x509.UniformResourceIdentifier.value` will now return an :term:`A-label` string when parsing a certificate containing an internationalized domain name (IDN) or if the caller passed a :term:`U-label` to the constructor. See below for additional deprecations related to this change.
Installing cryptography now requires pip 6 or newer.
Deprecated passing :term:`U-label` strings to the :class:`~cryptography.x509.DNSName`, :class:`~cryptography.x509.UniformResourceIdentifier`, and :class:`~cryptography.x509.RFC822Name` constructors. Instead, users should pass values as :term:`A-label` strings with idna encoding if necessary. This change will not affect anyone who is not processing internationalized domains.
Added support for :class:`~cryptography.hazmat.primitives.ciphers.algorithms.ChaCha20`. In most cases users should choose :class:`~cryptography.hazmat.primitives.ciphers.aead.ChaCha20Poly1305` rather than using this unauthenticated form.
Added :meth:`~cryptography.x509.CertificateRevocationList.is_signature_valid` to :class:`~cryptography.x509.CertificateRevocationList`.
Support :class:`~cryptography.hazmat.primitives.hashes.BLAKE2b` and :class:`~cryptography.hazmat.primitives.hashes.BLAKE2s` with :class:`~cryptography.hazmat.primitives.hmac.HMAC`.
Added support for :class:`~cryptography.hazmat.primitives.ciphers.modes.XTS` mode for AES.
Added support for using labels with :class:`~cryptography.hazmat.primitives.asymmetric.padding.OAEP` when using OpenSSL 1.0.2 or greater.
Improved compatibility with NSS when issuing certificates from an issuer that has a subject with non-UTF8String string types.
Add support for the :class:`~cryptography.x509.DeltaCRLIndicator` extension.
Add support for the :class:`~cryptography.x509.TLSFeature` extension. This is commonly used for enabling OCSP Must-Staple in certificates.
Add support for the :class:`~cryptography.x509.FreshestCRL` extension.
Marked all symbols as hidden in the manylinux1 wheel to avoid a bug with symbol resolution in certain scenarios.
2.0.1:
Fixed a compilation bug affecting OpenBSD.
Altered the manylinux1 wheels to statically link OpenSSL instead of dynamically linking and bundling the shared object. This should resolve crashes seen when using uwsgi or other binaries that link against OpenSSL independently.
Fixed the stack level for the signer and verifier warnings.
BACKWARDS INCOMPATIBLE: Support for Python 3.3 has been dropped.
We now ship manylinux1 wheels linked against OpenSSL 1.1.0f. These wheels will be automatically used with most Linux distributions if you are running the latest pip.
Deprecated the use of signer on :class:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPrivateKey`, :class:`~cryptography.hazmat.primitives.asymmetric.dsa.DSAPrivateKey`, and :class:`~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePrivateKey` in favor of sign.
Deprecated the use of verifier on :class:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPublicKey`, :class:`~cryptography.hazmat.primitives.asymmetric.dsa.DSAPublicKey`, and :class:`~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePublicKey` in favor of verify.
Added support for parsing :class:`~cryptography.x509.certificate_transparency.SignedCertificateTimestamp` objects from X.509 certificate extensions.
Added support for :class:`~cryptography.hazmat.primitives.ciphers.aead.ChaCha20Poly1305`.
Added support for :class:`~cryptography.hazmat.primitives.ciphers.aead.AESCCM`.
Added :class:`~cryptography.hazmat.primitives.ciphers.aead.AESGCM`, a "one shot" API for AES GCM encryption.
Added support for :doc:`/hazmat/primitives/asymmetric/x25519`.
Added support for serializing and deserializing Diffie-Hellman parameters with :func:`~cryptography.hazmat.primitives.serialization.load_pem_parameters`, :func:`~cryptography.hazmat.primitives.serialization.load_der_parameters`, and :meth:`~cryptography.hazmat.primitives.asymmetric.dh.DHParameters.parameter_bytes` .
The extensions attribute on :class:`~cryptography.x509.Certificate`, :class:`~cryptography.x509.CertificateSigningRequest`, :class:`~cryptography.x509.CertificateRevocationList`, and :class:`~cryptography.x509.RevokedCertificate` now caches the computed Extensions object. There should be no performance change, just a performance improvement for programs accessing the extensions attribute multiple times.
1.9 - 2017-05-29
~~~~~~~~~~~~~~~~
* **BACKWARDS INCOMPATIBLE:** Elliptic Curve signature verification no longer
returns ``True`` on success. This brings it in line with the interface's
documentation, and our intent. The correct way to use
:meth:`~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePublicKey.verify`
has always been to check whether or not
:class:`~cryptography.exceptions.InvalidSignature` was raised.
* **BACKWARDS INCOMPATIBLE:** Dropped support for macOS 10.7 and 10.8.
* **BACKWARDS INCOMPATIBLE:** The minimum supported PyPy version is now 5.3.
* Python 3.3 support has been deprecated, and will be removed in the next
``cryptography`` release.
* Add support for providing ``tag`` during
:class:`~cryptography.hazmat.primitives.ciphers.modes.GCM` finalization via
:meth:`~cryptography.hazmat.primitives.ciphers.AEADDecryptionContext.finalize_with_tag`.
* Fixed an issue preventing ``cryptography`` from compiling against
LibreSSL 2.5.x.
* Added
:meth:`~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePublicKey.key_size`
and
:meth:`~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePrivateKey.key_size`
as convenience methods for determining the bit size of a secret scalar for
the curve.
* Accessing an unrecognized extension marked critical on an X.509 object will
no longer raise an ``UnsupportedExtension`` exception, instead an
:class:`~cryptography.x509.UnrecognizedExtension` object will be returned.
This behavior was based on a poor reading of the RFC, unknown critical
extensions only need to be rejected on certificate verification.
* The CommonCrypto backend has been removed.
* MultiBackend has been removed.
* ``Whirlpool`` and ``RIPEMD160`` have been deprecated.
1.8.2 - 2017-05-26
~~~~~~~~~~~~~~~~~~
* Fixed a compilation bug affecting OpenSSL 1.1.0f.
* Updated Windows and macOS wheels to be compiled against OpenSSL 1.1.0f.
1.8.1 - 2017-03-10
~~~~~~~~~~~~~~~~~~
* Fixed macOS wheels to properly link against 1.1.0 rather than 1.0.2.
1.8 - 2017-03-09
~~~~~~~~~~~~~~~~
* Added support for Python 3.6.
* Windows and macOS wheels now link against OpenSSL 1.1.0.
* macOS wheels are no longer universal. This change significantly shrinks the
size of the wheels. Users on macOS 32-bit Python (if there are any) should
migrate to 64-bit or build their own packages.
* Changed ASN.1 dependency from ``pyasn1`` to ``asn1crypto`` resulting in a
general performance increase when encoding/decoding ASN.1 structures. Also,
the ``pyasn1_modules`` test dependency is no longer required.
* Added support for
:meth:`~cryptography.hazmat.primitives.ciphers.CipherContext.update_into` on
:class:`~cryptography.hazmat.primitives.ciphers.CipherContext`.
* Added
:meth:`~cryptography.hazmat.primitives.asymmetric.dh.DHPrivateKeyWithSerialization.private_bytes`
to
:class:`~cryptography.hazmat.primitives.asymmetric.dh.DHPrivateKeyWithSerialization`.
* Added
:meth:`~cryptography.hazmat.primitives.asymmetric.dh.DHPublicKeyWithSerialization.public_bytes`
to
:class:`~cryptography.hazmat.primitives.asymmetric.dh.DHPublicKeyWithSerialization`.
* :func:`~cryptography.hazmat.primitives.serialization.load_pem_private_key`
and
:func:`~cryptography.hazmat.primitives.serialization.load_der_private_key`
now require that ``password`` must be bytes if provided. Previously this
was documented but not enforced.
* Added support for subgroup order in :doc:`/hazmat/primitives/asymmetric/dh`.
Add more test dependencies.
Self tests cause a python core dump, see
https://github.com/pyca/cryptography/issues/3372
1.7.2 - 2017-01-27
~~~~~~~~~~~~~~~~~~
* Updated Windows and macOS wheels to be compiled against OpenSSL 1.0.2k.
1.7.1 - 2016-12-13
~~~~~~~~~~~~~~~~~~
* Fixed a regression in ``int_from_bytes`` where it failed to accept
``bytearray``.
1.7 - 2016-12-12
~~~~~~~~~~~~~~~~
* Support for OpenSSL 1.0.0 has been removed. Users on older version of OpenSSL
will need to upgrade.
* Added support for Diffie-Hellman key exchange using
:meth:`~cryptography.hazmat.primitives.asymmetric.dh.DHPrivateKeyWithSerialization.exchange`
* The OS random engine for OpenSSL has been rewritten to improve compatibility
with embedded Python and other edge cases. More information about this change
can be found in the
`pull request <https://github.com/pyca/cryptography/pull/3229>`_.
1.6 - 2016-11-22
~~~~~~~~~~~~~~~~
* Deprecated support for OpenSSL 1.0.0. Support will be removed in
``cryptography`` 1.7.
* Replaced the Python-based OpenSSL locking callbacks with a C version to fix
a potential deadlock that could occur if a garbage collection cycle occurred
while inside the lock.
* Added support for :class:`~cryptography.hazmat.primitives.hashes.BLAKE2b` and
:class:`~cryptography.hazmat.primitives.hashes.BLAKE2s` when using OpenSSL
1.1.0.
* Added
:attr:`~cryptography.x509.Certificate.signature_algorithm_oid` support to
:class:`~cryptography.x509.Certificate`.
* Added
:attr:`~cryptography.x509.CertificateSigningRequest.signature_algorithm_oid`
support to :class:`~cryptography.x509.CertificateSigningRequest`.
* Added
:attr:`~cryptography.x509.CertificateRevocationList.signature_algorithm_oid`
support to :class:`~cryptography.x509.CertificateRevocationList`.
* Added support for :class:`~cryptography.hazmat.primitives.kdf.scrypt.Scrypt`
when using OpenSSL 1.1.0.
* Added a workaround to improve compatibility with Python application bundling
tools like ``PyInstaller`` and ``cx_freeze``.
* Added support for generating a
:meth:`~cryptography.x509.random_serial_number`.
* Added support for encoding ``IPv4Network`` and ``IPv6Network`` in X.509
certificates for use with :class:`~cryptography.x509.NameConstraints`.
* Added :meth:`~cryptography.x509.Name.public_bytes` to
:class:`~cryptography.x509.Name`.
* Added :class:`~cryptography.x509.RelativeDistinguishedName`
* :class:`~cryptography.x509.DistributionPoint` now accepts
:class:`~cryptography.x509.RelativeDistinguishedName` for
:attr:`~cryptography.x509.DistributionPoint.relative_name`.
Deprecated use of :class:`~cryptography.x509.Name` as
:attr:`~cryptography.x509.DistributionPoint.relative_name`.
* :class:`~cryptography.x509.Name` now accepts an iterable of
:class:`~cryptography.x509.RelativeDistinguishedName`. RDNs can
be accessed via the :attr:`~cryptography.x509.Name.rdns`
attribute. When constructed with an iterable of
:class:`~cryptography.x509.NameAttribute`, each attribute becomes
a single-valued RDN.
* Added
:func:`~cryptography.hazmat.primitives.asymmetric.ec.derive_private_key`.
* Added support for signing and verifying RSA, DSA, and ECDSA signatures with
:class:`~cryptography.hazmat.primitives.asymmetric.utils.Prehashed`
digests.
1.5.3 - 2016-11-05
~~~~~~~~~~~~~~~~~~
* **SECURITY ISSUE**: Fixed a bug where ``HKDF`` would return an empty
byte-string if used with a ``length`` less than ``algorithm.digest_size``.
Credit to **Markus Döring** for reporting the issue.
1.5.1 - 2016-09-22
~~~~~~~~~~~~~~~~~~
* Updated Windows and OS X wheels to be compiled against OpenSSL 1.0.2i.
* Resolved a ``UserWarning`` when used with cffi 1.8.3.
* Fixed a memory leak in name creation with X.509.
* Added a workaround for old versions of setuptools.
* Fixed an issue preventing ``cryptography`` from compiling against
OpenSSL 1.0.2i.
1.5 - 2016-08-26
~~~~~~~~~~~~~~~~
* Added
:func:`~cryptography.hazmat.primitives.asymmetric.padding.calculate_max_pss_salt_length`.
* Added "one shot"
:meth:`~cryptography.hazmat.primitives.asymmetric.dsa.DSAPrivateKey.sign`
and
:meth:`~cryptography.hazmat.primitives.asymmetric.dsa.DSAPublicKey.verify`
methods to DSA keys.
* Added "one shot"
:meth:`~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePrivateKey.sign`
and
:meth:`~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePublicKey.verify`
methods to ECDSA keys.
* Switched back to the older callback model on Python 3.5 in order to mitigate
the locking callback problem with OpenSSL <1.1.0.
* :class:`~cryptography.x509.CertificateBuilder`,
:class:`~cryptography.x509.CertificateRevocationListBuilder`, and
:class:`~cryptography.x509.RevokedCertificateBuilder` now accept timezone
aware ``datetime`` objects as method arguments
* ``cryptography`` now supports OpenSSL 1.1.0 as a compilation target.
1.4 - 2016-06-04
~~~~~~~~~~~~~~~~
* Support for OpenSSL 0.9.8 has been removed. Users on older versions of
OpenSSL will need to upgrade.
* Added :class:`~cryptography.hazmat.primitives.kdf.kbkdf.KBKDFHMAC`.
* Added support for ``OpenSSH`` public key serialization.
* Added support for SHA-2 in RSA
:class:`~cryptography.hazmat.primitives.asymmetric.padding.OAEP` when using
OpenSSL 1.0.2 or greater.
* Added "one shot"
:meth:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPrivateKey.sign`
and
:meth:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPublicKey.verify`
methods to RSA keys.
1.3.2 - 2016-05-04
~~~~~~~~~~~~~~~~~~
* Updated Windows and OS X wheels to be compiled against OpenSSL 1.0.2h.
* Fixed an issue preventing ``cryptography`` from compiling against
LibreSSL 2.3.x.
1.3.1 - 2016-03-21
~~~~~~~~~~~~~~~~~~
* Fixed a bug that caused an ``AttributeError`` when using ``mock`` to patch
some ``cryptography`` modules.
1.3 - 2016-03-18
~~~~~~~~~~~~~~~~
* Added support for padding ANSI X.923 with
:class:`~cryptography.hazmat.primitives.padding.ANSIX923`.
* Deprecated support for OpenSSL 0.9.8. Support will be removed in
``cryptography`` 1.4.
* Added support for the :class:`~cryptography.x509.PolicyConstraints`
X.509 extension including both parsing and generation using
:class:`~cryptography.x509.CertificateBuilder` and
:class:`~cryptography.x509.CertificateSigningRequestBuilder`.
* Added :attr:`~cryptography.x509.CertificateSigningRequest.is_signature_valid`
to :class:`~cryptography.x509.CertificateSigningRequest`.
* Fixed an intermittent ``AssertionError`` when performing an RSA decryption on
an invalid ciphertext, ``ValueError`` is now correctly raised in all cases.
* Added
:meth:`~cryptography.x509.AuthorityKeyIdentifier.from_issuer_subject_key_identifier`.
