2.9 - master


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

  • 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 public_bytes() with no arguments, as per our deprecation policy. You must now pass encoding and format.
  • BACKWARDS INCOMPATIBLE: Reversed the order in which rfc4514_string() returns the RDNs as required by RFC 4514.
  • Added support for parsing single_extensions in an OCSP response.
  • NameAttribute values can now be empty strings.

2.8 - 2019-10-16

2.7 - 2019-05-30

  • 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 test. Users interested in running our tests can continue to follow the directions in our development documentation.
  • Add support for Poly1305 when using OpenSSL 1.1.1 or newer.
  • Support serialization with Encoding.OpenSSH and PublicFormat.OpenSSH in Ed25519PublicKey.public_bytes .
  • Correctly allow passing a SubjectKeyIdentifier to 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 - 2019-02-27

  • Resolved an error in our build infrastructure that broke our Python3 wheels for macOS and Linux.

2.6 - 2019-02-27

  • 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 encode_dss_signature() and decode_dss_signature() instead.
  • BACKWARDS INCOMPATIBLE: Removed cryptography.x509.Certificate.serial, which had been deprecated for nearly 3 years. Use serial_number instead.
  • Updated Windows, macOS, and manylinux1 wheels to be compiled with OpenSSL 1.1.1b.
  • Added support for Ed448 signing when using OpenSSL 1.1.1b or newer.
  • Added support for Ed25519 signing when using OpenSSL 1.1.1b or newer.
  • load_ssh_public_key() can now load ed25519 public keys.
  • Add support for easily mapping an object identifier to its elliptic curve class via get_curve_for_oid().
  • Add support for OpenSSL when compiled with the no-engine (OPENSSL_NO_ENGINE) flag.

2.5 - 2019-01-22

2.4.2 - 2018-11-21

  • Updated Windows, macOS, and manylinux1 wheels to be compiled with OpenSSL 1.1.0j.

2.4.1 - 2018-11-11

  • Fixed a build breakage in our manylinux1 wheels.

2.4 - 2018-11-11

  • 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 OCSP support.
  • Added support for PrecertPoison.

2.3.1 - 2018-08-14

  • Updated Windows, macOS, and manylinux1 wheels to be compiled with OpenSSL 1.1.0i.

2.3 - 2018-07-18

  • SECURITY ISSUE: 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 GCM constructor. CVE-2018-10903
  • Added support for Python 3.7.
  • Added extract_timestamp() to get the authenticated timestamp of a 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 get_revoked_certificate_by_serial_number for quick serial number searches in CRLs.
  • The RelativeDistinguishedName class now preserves the order of attributes. Duplicate attributes now raise an error instead of silently discarding duplicates.
  • aes_key_unwrap() and aes_key_unwrap_with_padding() now raise InvalidUnwrap if the wrapped key is an invalid length, instead of ValueError.

2.2.2 - 2018-03-27

  • Updated Windows, macOS, and manylinux1 wheels to be compiled with OpenSSL 1.1.0h.

2.2.1 - 2018-03-20

  • Reverted a change to GeneralNames which prohibited having zero elements, due to breakages.
  • Fixed a bug in aes_key_unwrap_with_padding() that caused it to raise InvalidUnwrap when key length modulo 8 was zero.

2.2 - 2018-03-19

2.1.4 - 2017-11-29

  • Added X509_up_ref for an upcoming pyOpenSSL release.

2.1.3 - 2017-11-02

  • Updated Windows, macOS, and manylinux1 wheels to be compiled with OpenSSL 1.1.0g.

2.1.2 - 2017-10-24

  • Corrected a bug with the manylinux1 wheels where OpenSSL’s stack was marked executable.

2.1.1 - 2017-10-12

  • Fixed support for install with the system pip on Ubuntu 16.04.

2.1 - 2017-10-11

  • 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 API stability policy.
  • BACKWARDS INCOMPATIBLE: DNSName.value, RFC822Name.value, and UniformResourceIdentifier.value will now return an A-label string when parsing a certificate containing an internationalized domain name (IDN) or if the caller passed a U-label to the constructor. See below for additional deprecations related to this change.
  • Installing cryptography now requires pip 6 or newer.
  • Deprecated passing U-label strings to the DNSName, UniformResourceIdentifier, and RFC822Name constructors. Instead, users should pass values as A-label strings with idna encoding if necessary. This change will not affect anyone who is not processing internationalized domains.
  • Added support for ChaCha20. In most cases users should choose ChaCha20Poly1305 rather than using this unauthenticated form.
  • Added is_signature_valid() to CertificateRevocationList.
  • Support BLAKE2b and BLAKE2s with HMAC.
  • Added support for XTS mode for AES.
  • Added support for using labels with 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 DeltaCRLIndicator extension.
  • Add support for the TLSFeature extension. This is commonly used for enabling OCSP Must-Staple in certificates.
  • Add support for the FreshestCRL extension.

2.0.3 - 2017-08-03

  • Fixed an issue with weak linking symbols when compiling on macOS versions older than 10.12.

2.0.2 - 2017-07-27

  • Marked all symbols as hidden in the manylinux1 wheel to avoid a bug with symbol resolution in certain scenarios.

2.0.1 - 2017-07-26

  • 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.

2.0 - 2017-07-17

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 verify() has always been to check whether or not 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 GCM finalization via finalize_with_tag().
  • Fixed an issue preventing cryptography from compiling against LibreSSL 2.5.x.
  • Added key_size() and 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 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 update_into() on CipherContext.
  • Added private_bytes() to DHPrivateKeyWithSerialization.
  • Added public_bytes() to DHPublicKey.
  • load_pem_private_key() and 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 Diffie-Hellman key exchange.

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 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.

1.6 - 2016-11-22

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. CVE-2016-9243

1.5.2 - 2016-09-26

  • Updated Windows and OS X wheels to be compiled against OpenSSL 1.0.2j.

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

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 KBKDFHMAC.
  • Added support for OpenSSH public key serialization.
  • Added support for SHA-2 in RSA OAEP when using OpenSSL 1.0.2 or greater.
  • Added “one shot” sign() and verify() methods to RSA keys.
  • Deprecated the serial attribute on Certificate, in favor of serial_number.

1.3.4 - 2016-06-03

  • Added another OpenSSL function to the bindings to support an upcoming pyOpenSSL release.

1.3.3 - 2016-06-02

  • Added two new OpenSSL functions to the bindings to support an upcoming pyOpenSSL release.

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

1.2.3 - 2016-03-01

  • Updated Windows and OS X wheels to be compiled against OpenSSL 1.0.2g.

1.2.2 - 2016-01-29

  • Updated Windows and OS X wheels to be compiled against OpenSSL 1.0.2f.

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

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

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 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

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

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

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 Fernet with MultiFernet.
  • More bit-lengths are now supported for p and q when loading DSA keys from numbers.
  • Added MACContext as a common interface for CMAC and HMAC and deprecated CMACContext.
  • Added support for encoding and decoding RFC 6979 signatures in Asymmetric Utilities.
  • Added 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 X.509 documentation 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 load_pem_private_key() to ease loading private keys, and load_pem_public_key() to support loading public keys.
  • Removed the, deprecated in 0.4, support for the salt_length argument to the MGF1 constructor. The salt_length should be passed to 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 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 multibackend.
  • Fix compilation error on OS X 10.8 (Mountain Lion).

0.5.1 - 2014-07-07

  • Add PKCS8SerializationBackend support to multibackend.

0.5 - 2014-07-07

0.4 - 2014-05-03

0.3 - 2014-03-27

  • Added HOTP.
  • Added TOTP.
  • Added IDEA support.
  • Added signature support to RSAPrivateKey and verification support to 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 commoncrypto.
  • Added initial commoncrypto.
  • Removed register_cipher_adapter method from 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 PBKDF2HMAC.
  • Added HKDF.
  • Added multibackend.
  • Set default random for the OpenSSL backend to the OS random engine.
  • Added CAST5 (CAST-128) support.

0.1 - 2014-01-08

  • Initial release.