CHANGELOG.rst

Changelog

1.3 - master

Note

This version is not yet released and is under active development.

• Deprecated support for OpenSSL 0.9.8. Support will be removed in cryptography 1.4.

1.2.1 - 2016-01-08

• Reverts a change to an OpenSSL EVP_PKEY object that caused errors with pyOpenSSL.

1.2 - 2016-01-08

• BACKWARDS INCOMPATIBLE: :class:`~cryptography.x509.RevokedCertificate` :attr:`~cryptography.x509.RevokedCertificate.extensions` now uses extension classes rather than returning raw values inside the :class:`~cryptography.x509.Extension` :attr:`~cryptography.x509.Extension.value`. The new classes are:
  • :class:`~cryptography.x509.CertificateIssuer`
  • :class:`~cryptography.x509.CRLReason`
  • :class:`~cryptography.x509.InvalidityDate`
• Deprecated support for OpenSSL 0.9.8 and 1.0.0. At this time there is no time table for actually dropping support, however we strongly encourage all users to upgrade, as those versions no longer receive support from the OpenSSL project.
• The :class:`~cryptography.x509.Certificate` class now has :attr:`~cryptography.x509.Certificate.signature` and :attr:`~cryptography.x509.Certificate.tbs_certificate_bytes` attributes.
• The :class:`~cryptography.x509.CertificateSigningRequest` class now has :attr:`~cryptography.x509.CertificateSigningRequest.signature` and :attr:`~cryptography.x509.CertificateSigningRequest.tbs_certrequest_bytes` attributes.
• The :class:`~cryptography.x509.CertificateRevocationList` class now has :attr:`~cryptography.x509.CertificateRevocationList.signature` and :attr:`~cryptography.x509.CertificateRevocationList.tbs_certlist_bytes` attributes.
• :class:`~cryptography.x509.NameConstraints` are now supported in the :class:`~cryptography.x509.CertificateBuilder` and :class:`~cryptography.x509.CertificateSigningRequestBuilder`.
• Support serialization of certificate revocation lists using the :meth:`~cryptography.x509.CertificateRevocationList.public_bytes` method of :class:`~cryptography.x509.CertificateRevocationList`.
• Add support for parsing :class:`~cryptography.x509.CertificateRevocationList` :meth:`~cryptography.x509.CertificateRevocationList.extensions` in the OpenSSL backend. The following extensions are currently supported:
  • :class:`~cryptography.x509.AuthorityInformationAccess`
  • :class:`~cryptography.x509.AuthorityKeyIdentifier`
  • :class:`~cryptography.x509.CRLNumber`
  • :class:`~cryptography.x509.IssuerAlternativeName`
• Added :class:`~cryptography.x509.CertificateRevocationListBuilder` and :class:`~cryptography.x509.RevokedCertificateBuilder` to allow creation of CRLs.
• Unrecognized non-critical X.509 extensions are now parsed into an :class:`~cryptography.x509.UnrecognizedExtension` object.

1.1.2 - 2015-12-10

• Fixed a SIGBUS crash with the OS X wheels caused by redefinition of a method.
• Fixed a runtime error undefined symbol EC_GFp_nistp224_method that occurred with some OpenSSL installations.
• Updated Windows and OS X wheels to be compiled against OpenSSL 1.0.2e.

1.1.1 - 2015-11-19

• Fixed several small bugs related to compiling the OpenSSL bindings with unusual OpenSSL configurations.
• Resolved an issue where, depending on the method of installation and which Python interpreter they were using, users on El Capitan (OS X 10.11) may have seen an InternalError on import.

1.1 - 2015-10-28

• Added support for Elliptic Curve Diffie-Hellman with :class:`~cryptography.hazmat.primitives.asymmetric.ec.ECDH`.
• Added :class:`~cryptography.hazmat.primitives.kdf.x963kdf.X963KDF`.
• Added support for parsing certificate revocation lists (CRLs) using :func:`~cryptography.x509.load_pem_x509_crl` and :func:`~cryptography.x509.load_der_x509_crl`.
• Add support for AES key wrapping with :func:`~cryptography.hazmat.primitives.keywrap.aes_key_wrap` and :func:`~cryptography.hazmat.primitives.keywrap.aes_key_unwrap`.
• Added a __hash__ method to :class:`~cryptography.x509.Name`.
• Add support for encoding and decoding elliptic curve points to a byte string form using :meth:`~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePublicNumbers.encode_point` and :meth:`~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePublicNumbers.from_encoded_point`.
• Added :meth:`~cryptography.x509.Extensions.get_extension_for_class`.
• :class:`~cryptography.x509.CertificatePolicies` are now supported in the :class:`~cryptography.x509.CertificateBuilder`.
• countryName is now encoded as a PrintableString when creating subject and issuer distinguished names with the Certificate and CSR builder classes.

1.0.2 - 2015-09-27

• SECURITY ISSUE: The OpenSSL backend prior to 1.0.2 made extensive use of assertions to check response codes where our tests could not trigger a failure. However, when Python is run with -O these asserts are optimized away. If a user ran Python with this flag and got an invalid response code this could result in undefined behavior or worse. Accordingly, all response checks from the OpenSSL backend have been converted from assert to a true function call. Credit Emilia Käsper (Google Security Team) for the report.

1.0.1 - 2015-09-05

• We now ship OS X wheels that statically link OpenSSL by default. When installing a wheel on OS X 10.10+ (and using a Python compiled against the 10.10 SDK) users will no longer need to compile. See :doc:`/installation` for alternate installation methods if required.
• Set the default string mask to UTF-8 in the OpenSSL backend to resolve character encoding issues with older versions of OpenSSL.
• Several new OpenSSL bindings have been added to support a future pyOpenSSL release.
• Raise an error during install on PyPy < 2.6. 1.0+ requires PyPy 2.6+.

1.0 - 2015-08-12

• Switched to the new cffi set_source out-of-line API mode for compilation. This results in significantly faster imports and lowered memory consumption. Due to this change we no longer support PyPy releases older than 2.6 nor do we support any released version of PyPy3 (until a version supporting cffi 1.0 comes out).
• Fix parsing of OpenSSH public keys that have spaces in comments.
• Support serialization of certificate signing requests using the public_bytes method of :class:`~cryptography.x509.CertificateSigningRequest`.
• Support serialization of certificates using the public_bytes method of :class:`~cryptography.x509.Certificate`.
• Add get_provisioning_uri method to :class:`~cryptography.hazmat.primitives.twofactor.hotp.HOTP` and :class:`~cryptography.hazmat.primitives.twofactor.totp.TOTP` for generating provisioning URIs.
• Add :class:`~cryptography.hazmat.primitives.kdf.concatkdf.ConcatKDFHash` and :class:`~cryptography.hazmat.primitives.kdf.concatkdf.ConcatKDFHMAC`.
• Raise a TypeError when passing objects that are not text as the value to :class:`~cryptography.x509.NameAttribute`.
• Add support for :class:`~cryptography.x509.OtherName` as a general name type.
• Added new X.509 extension support in :class:`~cryptography.x509.Certificate` The following new extensions are now supported:
  • :class:`~cryptography.x509.OCSPNoCheck`
  • :class:`~cryptography.x509.InhibitAnyPolicy`
  • :class:`~cryptography.x509.IssuerAlternativeName`
  • :class:`~cryptography.x509.NameConstraints`
• Extension support was added to :class:`~cryptography.x509.CertificateSigningRequest`.
• Add support for creating signed certificates with :class:`~cryptography.x509.CertificateBuilder`. This includes support for the following extensions:
  • :class:`~cryptography.x509.BasicConstraints`
  • :class:`~cryptography.x509.SubjectAlternativeName`
  • :class:`~cryptography.x509.KeyUsage`
  • :class:`~cryptography.x509.ExtendedKeyUsage`
  • :class:`~cryptography.x509.SubjectKeyIdentifier`
  • :class:`~cryptography.x509.AuthorityKeyIdentifier`
  • :class:`~cryptography.x509.AuthorityInformationAccess`
  • :class:`~cryptography.x509.CRLDistributionPoints`
  • :class:`~cryptography.x509.InhibitAnyPolicy`
  • :class:`~cryptography.x509.IssuerAlternativeName`
  • :class:`~cryptography.x509.OCSPNoCheck`
• Add support for creating certificate signing requests with :class:`~cryptography.x509.CertificateSigningRequestBuilder`. This includes support for the same extensions supported in the CertificateBuilder.
• Deprecate encode_rfc6979_signature and decode_rfc6979_signature in favor of :func:`~cryptography.hazmat.primitives.asymmetric.utils.encode_dss_signature` and :func:`~cryptography.hazmat.primitives.asymmetric.utils.decode_dss_signature`.

0.9.3 - 2015-07-09

• Updated Windows wheels to be compiled against OpenSSL 1.0.2d.

0.9.2 - 2015-07-04

• Updated Windows wheels to be compiled against OpenSSL 1.0.2c.

0.9.1 - 2015-06-06

• SECURITY ISSUE: Fixed a double free in the OpenSSL backend when using DSA to verify signatures. Note that this only affects PyPy 2.6.0 and (presently unreleased) CFFI versions greater than 1.1.0.

0.9 - 2015-05-13

• Removed support for Python 3.2. This version of Python is rarely used and caused support headaches. Users affected by this should upgrade to 3.3+.

• Deprecated support for Python 2.6. At the time there is no time table for actually dropping support, however we strongly encourage all users to upgrade their Python, as Python 2.6 no longer receives support from the Python core team.

• Add support for the :class:`~cryptography.hazmat.primitives.asymmetric.ec.SECP256K1` elliptic curve.

• Fixed compilation when using an OpenSSL which was compiled with the no-comp (OPENSSL_NO_COMP) option.

• Support :attr:`~cryptography.hazmat.primitives.serialization.Encoding.DER` serialization of public keys using the public_bytes method of :class:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPublicKeyWithSerialization`, :class:`~cryptography.hazmat.primitives.asymmetric.dsa.DSAPublicKeyWithSerialization`, and :class:`~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePublicKeyWithSerialization`.

• Support :attr:`~cryptography.hazmat.primitives.serialization.Encoding.DER` serialization of private keys using the private_bytes method of :class:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPrivateKeyWithSerialization`, :class:`~cryptography.hazmat.primitives.asymmetric.dsa.DSAPrivateKeyWithSerialization`, and :class:`~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePrivateKeyWithSerialization`.

• Add support for parsing X.509 certificate signing requests (CSRs) with :func:`~cryptography.x509.load_pem_x509_csr` and :func:`~cryptography.x509.load_der_x509_csr`.

• Moved cryptography.exceptions.InvalidToken to :class:`cryptography.hazmat.primitives.twofactor.InvalidToken` and deprecated the old location. This was moved to minimize confusion between this exception and :class:`cryptography.fernet.InvalidToken`.

• Added support for X.509 extensions in :class:`~cryptography.x509.Certificate` objects. The following extensions are supported as of this release:

  • :class:`~cryptography.x509.BasicConstraints`
  • :class:`~cryptography.x509.AuthorityKeyIdentifier`
  • :class:`~cryptography.x509.SubjectKeyIdentifier`
  • :class:`~cryptography.x509.KeyUsage`
  • :class:`~cryptography.x509.SubjectAlternativeName`
  • :class:`~cryptography.x509.ExtendedKeyUsage`
  • :class:`~cryptography.x509.CRLDistributionPoints`
  • :class:`~cryptography.x509.AuthorityInformationAccess`
  • :class:`~cryptography.x509.CertificatePolicies`

  Note that unsupported extensions with the critical flag raise :class:`~cryptography.x509.UnsupportedExtension` while unsupported extensions set to non-critical are silently ignored. Read the :doc:`X.509 documentation</x509/index>` for more information.

0.8.2 - 2015-04-10

• Fixed a race condition when initializing the OpenSSL or CommonCrypto backends in a multi-threaded scenario.

0.8.1 - 2015-03-20

• Updated Windows wheels to be compiled against OpenSSL 1.0.2a.

0.8 - 2015-03-08

• :func:`~cryptography.hazmat.primitives.serialization.load_ssh_public_key` can now load elliptic curve public keys.
• Added :attr:`~cryptography.x509.Certificate.signature_hash_algorithm` support to :class:`~cryptography.x509.Certificate`.
• Added :func:`~cryptography.hazmat.primitives.asymmetric.rsa.rsa_recover_prime_factors`
• :class:`~cryptography.hazmat.primitives.kdf.KeyDerivationFunction` was moved from :mod:`~cryptography.hazmat.primitives.interfaces` to :mod:`~cryptography.hazmat.primitives.kdf`.
• Added support for parsing X.509 names. See the :doc:`X.509 documentation</x509/index>` for more information.
• Added :func:`~cryptography.hazmat.primitives.serialization.load_der_private_key` to support loading of DER encoded private keys and :func:`~cryptography.hazmat.primitives.serialization.load_der_public_key` to support loading DER encoded public keys.
• Fixed building against LibreSSL, a compile-time substitute for OpenSSL.
• FreeBSD 9.2 was removed from the continuous integration system.
• Updated Windows wheels to be compiled against OpenSSL 1.0.2.
• :func:`~cryptography.hazmat.primitives.serialization.load_pem_public_key` and :func:`~cryptography.hazmat.primitives.serialization.load_der_public_key` now support PKCS1 RSA public keys (in addition to the previous support for SubjectPublicKeyInfo format for RSA, EC, and DSA).
• Added :class:`~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePrivateKeyWithSerialization` and deprecated EllipticCurvePrivateKeyWithNumbers.
• Added :meth:`~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePrivateKeyWithSerialization.private_bytes` to :class:`~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePrivateKeyWithSerialization`.
• Added :class:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPrivateKeyWithSerialization` and deprecated RSAPrivateKeyWithNumbers.
• Added :meth:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPrivateKeyWithSerialization.private_bytes` to :class:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPrivateKeyWithSerialization`.
• Added :class:`~cryptography.hazmat.primitives.asymmetric.dsa.DSAPrivateKeyWithSerialization` and deprecated DSAPrivateKeyWithNumbers.
• Added :meth:`~cryptography.hazmat.primitives.asymmetric.dsa.DSAPrivateKeyWithSerialization.private_bytes` to :class:`~cryptography.hazmat.primitives.asymmetric.dsa.DSAPrivateKeyWithSerialization`.
• Added :class:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPublicKeyWithSerialization` and deprecated RSAPublicKeyWithNumbers.
• Added public_bytes to :class:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPublicKeyWithSerialization`.
• Added :class:`~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePublicKeyWithSerialization` and deprecated EllipticCurvePublicKeyWithNumbers.
• Added public_bytes to :class:`~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePublicKeyWithSerialization`.
• Added :class:`~cryptography.hazmat.primitives.asymmetric.dsa.DSAPublicKeyWithSerialization` and deprecated DSAPublicKeyWithNumbers.
• Added public_bytes to :class:`~cryptography.hazmat.primitives.asymmetric.dsa.DSAPublicKeyWithSerialization`.
• :class:`~cryptography.hazmat.primitives.hashes.HashAlgorithm` and :class:`~cryptography.hazmat.primitives.hashes.HashContext` were moved from :mod:`~cryptography.hazmat.primitives.interfaces` to :mod:`~cryptography.hazmat.primitives.hashes`.
• :class:`~cryptography.hazmat.primitives.ciphers.CipherContext`, :class:`~cryptography.hazmat.primitives.ciphers.AEADCipherContext`, :class:`~cryptography.hazmat.primitives.ciphers.AEADEncryptionContext`, :class:`~cryptography.hazmat.primitives.ciphers.CipherAlgorithm`, and :class:`~cryptography.hazmat.primitives.ciphers.BlockCipherAlgorithm` were moved from :mod:`~cryptography.hazmat.primitives.interfaces` to :mod:`~cryptography.hazmat.primitives.ciphers`.
• :class:`~cryptography.hazmat.primitives.ciphers.modes.Mode`, :class:`~cryptography.hazmat.primitives.ciphers.modes.ModeWithInitializationVector`, :class:`~cryptography.hazmat.primitives.ciphers.modes.ModeWithNonce`, and :class:`~cryptography.hazmat.primitives.ciphers.modes.ModeWithAuthenticationTag` were moved from :mod:`~cryptography.hazmat.primitives.interfaces` to :mod:`~cryptography.hazmat.primitives.ciphers.modes`.
• :class:`~cryptography.hazmat.primitives.padding.PaddingContext` was moved from :mod:`~cryptography.hazmat.primitives.interfaces` to :mod:`~cryptography.hazmat.primitives.padding`.
• :class:`~cryptography.hazmat.primitives.asymmetric.padding.AsymmetricPadding` was moved from :mod:`~cryptography.hazmat.primitives.interfaces` to :mod:`~cryptography.hazmat.primitives.asymmetric.padding`.
• :class:`~cryptography.hazmat.primitives.asymmetric.AsymmetricSignatureContext` and :class:`~cryptography.hazmat.primitives.asymmetric.AsymmetricVerificationContext` were moved from :mod:`~cryptography.hazmat.primitives.interfaces` to :mod:`~cryptography.hazmat.primitives.asymmetric`.
• :class:`~cryptography.hazmat.primitives.asymmetric.dsa.DSAParameters`, :class:`~cryptography.hazmat.primitives.asymmetric.dsa.DSAParametersWithNumbers`, :class:`~cryptography.hazmat.primitives.asymmetric.dsa.DSAPrivateKey`, DSAPrivateKeyWithNumbers, :class:`~cryptography.hazmat.primitives.asymmetric.dsa.DSAPublicKey` and DSAPublicKeyWithNumbers were moved from :mod:`~cryptography.hazmat.primitives.interfaces` to :mod:`~cryptography.hazmat.primitives.asymmetric.dsa`
• :class:`~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurve`, :class:`~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurveSignatureAlgorithm`, :class:`~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePrivateKey`, EllipticCurvePrivateKeyWithNumbers, :class:`~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePublicKey`, and EllipticCurvePublicKeyWithNumbers were moved from :mod:`~cryptography.hazmat.primitives.interfaces` to :mod:`~cryptography.hazmat.primitives.asymmetric.ec`.
• :class:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPrivateKey`, RSAPrivateKeyWithNumbers, :class:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPublicKey` and RSAPublicKeyWithNumbers were moved from :mod:`~cryptography.hazmat.primitives.interfaces` to :mod:`~cryptography.hazmat.primitives.asymmetric.rsa`.

0.7.2 - 2015-01-16

• Updated Windows wheels to be compiled against OpenSSL 1.0.1l.
• enum34 is no longer installed on Python 3.4, where it is included in the standard library.
• Added a new function to the OpenSSL bindings to support additional functionality in pyOpenSSL.

0.7.1 - 2014-12-28

• Fixed an issue preventing compilation on platforms where OPENSSL_NO_SSL3 was defined.

0.7 - 2014-12-17

• Cryptography has been relicensed from the Apache Software License, Version 2.0, to being available under either the Apache Software License, Version 2.0, or the BSD license.
• Added key-rotation support to :doc:`Fernet </fernet>` with :class:`~cryptography.fernet.MultiFernet`.
• More bit-lengths are now supported for p and q when loading DSA keys from numbers.
• Added :class:`~cryptography.hazmat.primitives.interfaces.MACContext` as a common interface for CMAC and HMAC and deprecated CMACContext.
• Added support for encoding and decoding RFC 6979 signatures in :doc:`/hazmat/primitives/asymmetric/utils`.
• Added :func:`~cryptography.hazmat.primitives.serialization.load_ssh_public_key` to support the loading of OpenSSH public keys (RFC 4253). Only RSA and DSA keys are currently supported.
• Added initial support for X.509 certificate parsing. See the :doc:`X.509 documentation</x509/index>` for more information.

0.6.1 - 2014-10-15

• Updated Windows wheels to be compiled against OpenSSL 1.0.1j.
• Fixed an issue where OpenSSL 1.0.1j changed the errors returned by some functions.
• Added our license file to the cryptography-vectors package.
• Implemented DSA hash truncation support (per FIPS 186-3) in the OpenSSL backend. This works around an issue in 1.0.0, 1.0.0a, and 1.0.0b where truncation was not implemented.

0.6 - 2014-09-29

• Added :func:`~cryptography.hazmat.primitives.serialization.load_pem_private_key` to ease loading private keys, and :func:`~cryptography.hazmat.primitives.serialization.load_pem_public_key` to support loading public keys.
• Removed the, deprecated in 0.4, support for the salt_length argument to the :class:`~cryptography.hazmat.primitives.asymmetric.padding.MGF1` constructor. The salt_length should be passed to :class:`~cryptography.hazmat.primitives.asymmetric.padding.PSS` instead.
• Fix compilation on OS X Yosemite.
• Deprecated elliptic_curve_private_key_from_numbers and elliptic_curve_public_key_from_numbers in favor of load_elliptic_curve_private_numbers and load_elliptic_curve_public_numbers on :class:`~cryptography.hazmat.backends.interfaces.EllipticCurveBackend`.
• Added EllipticCurvePrivateKeyWithNumbers and EllipticCurvePublicKeyWithNumbers support.
• Work around three GCM related bugs in CommonCrypto and OpenSSL.
  • On the CommonCrypto backend adding AAD but not subsequently calling update would return null tag bytes.
  • One the CommonCrypto backend a call to update without an empty add AAD call would return null ciphertext bytes.
  • On the OpenSSL backend with certain versions adding AAD only would give invalid tag bytes.
• Support loading EC private keys from PEM.

0.5.4 - 2014-08-20

• Added several functions to the OpenSSL bindings to support new functionality in pyOpenSSL.
• Fixed a redefined constant causing compilation failure with Solaris 11.2.

0.5.3 - 2014-08-06

• Updated Windows wheels to be compiled against OpenSSL 1.0.1i.

0.5.2 - 2014-07-09

• Add TraditionalOpenSSLSerializationBackend support to :doc:`/hazmat/backends/multibackend`.
• Fix compilation error on OS X 10.8 (Mountain Lion).

0.5.1 - 2014-07-07

• Add PKCS8SerializationBackend support to :doc:`/hazmat/backends/multibackend`.

0.5 - 2014-07-07

• BACKWARDS INCOMPATIBLE: :class:`~cryptography.hazmat.primitives.ciphers.modes.GCM` no longer allows truncation of tags by default. Previous versions of cryptography allowed tags to be truncated by default, applications wishing to preserve this behavior (not recommended) can pass the min_tag_length argument.
• Windows builds now statically link OpenSSL by default. When installing a wheel on Windows you no longer need to install OpenSSL separately. Windows users can switch between static and dynamic linking with an environment variable. See :doc:`/installation` for more details.
• Added :class:`~cryptography.hazmat.primitives.kdf.hkdf.HKDFExpand`.
• Added :class:`~cryptography.hazmat.primitives.ciphers.modes.CFB8` support for :class:`~cryptography.hazmat.primitives.ciphers.algorithms.AES` and :class:`~cryptography.hazmat.primitives.ciphers.algorithms.TripleDES` on :doc:`/hazmat/backends/commoncrypto` and :doc:`/hazmat/backends/openssl`.
• Added AES :class:`~cryptography.hazmat.primitives.ciphers.modes.CTR` support to the OpenSSL backend when linked against 0.9.8.
• Added PKCS8SerializationBackend and TraditionalOpenSSLSerializationBackend support to the :doc:`/hazmat/backends/openssl`.
• Added :doc:`/hazmat/primitives/asymmetric/ec` and :class:`~cryptography.hazmat.backends.interfaces.EllipticCurveBackend`.
• Added :class:`~cryptography.hazmat.primitives.ciphers.modes.ECB` support for :class:`~cryptography.hazmat.primitives.ciphers.algorithms.TripleDES` on :doc:`/hazmat/backends/commoncrypto` and :doc:`/hazmat/backends/openssl`.
• Deprecated the concrete RSAPrivateKey class in favor of backend specific providers of the :class:`cryptography.hazmat.primitives.asymmetric.rsa.RSAPrivateKey` interface.
• Deprecated the concrete RSAPublicKey in favor of backend specific providers of the :class:`cryptography.hazmat.primitives.asymmetric.rsa.RSAPublicKey` interface.
• Deprecated the concrete DSAPrivateKey class in favor of backend specific providers of the :class:`cryptography.hazmat.primitives.asymmetric.dsa.DSAPrivateKey` interface.
• Deprecated the concrete DSAPublicKey class in favor of backend specific providers of the :class:`cryptography.hazmat.primitives.asymmetric.dsa.DSAPublicKey` interface.
• Deprecated the concrete DSAParameters class in favor of backend specific providers of the :class:`cryptography.hazmat.primitives.asymmetric.dsa.DSAParameters` interface.
• Deprecated encrypt_rsa, decrypt_rsa, create_rsa_signature_ctx and create_rsa_verification_ctx on :class:`~cryptography.hazmat.backends.interfaces.RSABackend`.
• Deprecated create_dsa_signature_ctx and create_dsa_verification_ctx on :class:`~cryptography.hazmat.backends.interfaces.DSABackend`.

0.4 - 2014-05-03

• Deprecated salt_length on :class:`~cryptography.hazmat.primitives.asymmetric.padding.MGF1` and added it to :class:`~cryptography.hazmat.primitives.asymmetric.padding.PSS`. It will be removed from MGF1 in two releases per our :doc:`/api-stability` policy.
• Added :class:`~cryptography.hazmat.primitives.ciphers.algorithms.SEED` support.
• Added :class:`~cryptography.hazmat.primitives.cmac.CMAC`.
• Added decryption support to :class:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPrivateKey` and encryption support to :class:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPublicKey`.
• Added signature support to :class:`~cryptography.hazmat.primitives.asymmetric.dsa.DSAPrivateKey` and verification support to :class:`~cryptography.hazmat.primitives.asymmetric.dsa.DSAPublicKey`.

0.3 - 2014-03-27

• Added :class:`~cryptography.hazmat.primitives.twofactor.hotp.HOTP`.
• Added :class:`~cryptography.hazmat.primitives.twofactor.totp.TOTP`.
• Added :class:`~cryptography.hazmat.primitives.ciphers.algorithms.IDEA` support.
• Added signature support to :class:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPrivateKey` and verification support to :class:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPublicKey`.
• Moved test vectors to the new cryptography_vectors package.

0.2.2 - 2014-03-03

• Removed a constant definition that was causing compilation problems with specific versions of OpenSSL.

0.2.1 - 2014-02-22

• Fix a bug where importing cryptography from multiple paths could cause initialization to fail.

0.2 - 2014-02-20

• Added :doc:`/hazmat/backends/commoncrypto`.
• Added initial :doc:`/hazmat/bindings/commoncrypto`.
• Removed register_cipher_adapter method from :class:`~cryptography.hazmat.backends.interfaces.CipherBackend`.
• Added support for the OpenSSL backend under Windows.
• Improved thread-safety for the OpenSSL backend.
• Fixed compilation on systems where OpenSSL's ec.h header is not available, such as CentOS.
• Added :class:`~cryptography.hazmat.primitives.kdf.pbkdf2.PBKDF2HMAC`.
• Added :class:`~cryptography.hazmat.primitives.kdf.hkdf.HKDF`.
• Added :doc:`/hazmat/backends/multibackend`.
• Set default random for the :doc:`/hazmat/backends/openssl` to the OS random engine.
• Added :class:`~cryptography.hazmat.primitives.ciphers.algorithms.CAST5` (CAST-128) support.

0.1 - 2014-01-08

• Initial release.