Changelog

37.0.0 - main

Note

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

  • BACKWARDS INCOMPATIBLE: Dropped support for LibreSSL 2.9.x and 3.0.x. The new minimum LibreSSL version is 3.1+.

  • BACKWARDS INCOMPATIBLE: Removed signer and verifier methods from the public key and private key classes. These methods were originally deprecated in version 2.0, but had an extended deprecation timeline due to usage. Any remaining users should transition to sign and verify.

  • Deprecated OpenSSL 1.1.0 support. OpenSSL 1.1.0 is no longer supported by the OpenSSL project. Support for compiling with OpenSSL 1.1.0 will be removed in a future release.

  • Added limited support for distinguished names containing a bit string.

  • We now ship universal2 wheels on macOS, which contain both arm64 and x86_64 architectures. Users on macOS should upgrade to the latest pip to ensure they can use this wheel, although we will continue to ship x86_64 specific wheels for now to ease the transition.

36.0.0 - 2021-11-21

  • FINAL DEPRECATION Support for verifier and signer on our asymmetric key classes was deprecated in version 2.0. These functions had an extended deprecation due to usage, however the next version of cryptography will drop support. Users should migrate to sign and verify.

  • The entire X.509 layer is now written in Rust. This allows alternate asymmetric key implementations that can support cloud key management services or hardware security modules provided they implement the necessary interface (for example: EllipticCurvePrivateKey).

  • Deprecated the backend argument for all functions.

  • Added support for AESOCB3.

  • Added support for iterating over arbitrary request attributes.

  • Deprecated the get_attribute_for_oid method on CertificateSigningRequest in favor of get_attribute_for_oid() on the new Attributes object.

  • Fixed handling of PEM files to allow loading when certificate and key are in the same file.

  • Fixed parsing of CertificatePolicies extensions containing legacy BMPString values in their explicitText.

  • Allow parsing of negative serial numbers in certificates. Negative serial numbers are prohibited by RFC 5280 so a deprecation warning will be raised whenever they are encountered. A future version of cryptography will drop support for parsing them.

  • Added support for parsing PKCS12 files with friendly names for all certificates with load_pkcs12(), which will return an object of type PKCS12KeyAndCertificates.

  • rfc4514_string() and related methods now have an optional attr_name_overrides parameter to supply custom OID to name mappings, which can be used to match vendor-specific extensions.

  • BACKWARDS INCOMPATIBLE: Reverted the nonstandard formatting of email address fields as E in rfc4514_string() methods from version 35.0.

    The previous behavior can be restored with: name.rfc4514_string({NameOID.EMAIL_ADDRESS: "E"})

  • Allow X25519PublicKey and X448PublicKey to be used as public keys when parsing certificates or creating them with CertificateBuilder. These key types must be signed with a different signing algorithm as X25519 and X448 do not support signing.

  • Extension values can now be serialized to a DER byte string by calling public_bytes().

  • Added experimental support for compiling against BoringSSL. As BoringSSL does not commit to a stable API, cryptography tests against the latest commit only. Please note that several features are not available when building against BoringSSL.

  • Parsing CertificateSigningRequest from DER and PEM now, for a limited time period, allows the Extension critical field to be incorrectly encoded. See the issue for complete details. This will be reverted in a future cryptography release.

  • When OCSPNonce are parsed and generated their value is now correctly wrapped in an ASN.1 OCTET STRING. This conforms to RFC 6960 but conflicts with the original behavior specified in RFC 2560. For a temporary period for backwards compatibility, we will also parse values that are encoded as specified in RFC 2560 but this behavior will be removed in a future release.

35.0.0 - 2021-09-29

  • Changed the version scheme. This will result in us incrementing the major version more frequently, but does not change our existing backwards compatibility policy.

  • BACKWARDS INCOMPATIBLE: The X.509 PEM parsers now require that the PEM string passed have PEM delimiters of the correct type. For example, parsing a private key PEM concatenated with a certificate PEM will no longer be accepted by the PEM certificate parser.

  • BACKWARDS INCOMPATIBLE: The X.509 certificate parser no longer allows negative serial numbers. RFC 5280 has always prohibited these.

  • BACKWARDS INCOMPATIBLE: Additional forms of invalid ASN.1 found during X.509 parsing will raise an error on initial parse rather than when the malformed field is accessed.

  • Rust is now required for building cryptography, the CRYPTOGRAPHY_DONT_BUILD_RUST environment variable is no longer respected.

  • Parsers for X.509 no longer use OpenSSL and have been rewritten in Rust. This should be backwards compatible (modulo the items listed above) and improve both security and performance.

  • Added support for OpenSSL 3.0.0 as a compilation target.

  • Added support for SM3 and SM4, when using OpenSSL 1.1.1. These algorithms are provided for compatibility in regions where they may be required, and are not generally recommended.

  • We now ship manylinux_2_24 and musllinux_1_1 wheels, in addition to our manylinux2010 and manylinux2014 wheels. Users on distributions like Alpine Linux should ensure they upgrade to the latest pip to correctly receive wheels.

  • Added rfc4514_attribute_name attribute to x509.NameAttribute.

  • Added KBKDFCMAC.

3.4.8 - 2021-08-24

  • Updated Windows, macOS, and manylinux wheels to be compiled with OpenSSL 1.1.1l.

3.4.7 - 2021-03-25

  • Updated Windows, macOS, and manylinux wheels to be compiled with OpenSSL 1.1.1k.

3.4.6 - 2021-02-16

  • Updated Windows, macOS, and manylinux wheels to be compiled with OpenSSL 1.1.1j.

3.4.5 - 2021-02-13

  • Various improvements to type hints.

  • Lower the minimum supported Rust version (MSRV) to >=1.41.0. This change improves compatibility with system-provided Rust on several Linux distributions.

  • cryptography will be switching to a new versioning scheme with its next feature release. More information is available in our API stability documentation.

3.4.4 - 2021-02-09

  • Added a py.typed file so that mypy will know to use our type annotations.

  • Fixed an import cycle that could be triggered by certain import sequences.

3.4.3 - 2021-02-08

  • Specify our supported Rust version (>=1.45.0) in our setup.py so users on older versions will get a clear error message.

3.4.2 - 2021-02-08

  • Improvements to make the rust transition a bit easier. This includes some better error messages and small dependency fixes. If you experience installation problems Be sure to update pip first, then check the FAQ.

3.4.1 - 2021-02-07

  • Fixed a circular import issue.

  • Added additional debug output to assist users seeing installation errors due to outdated pip or missing rustc.

3.4 - 2021-02-07

  • BACKWARDS INCOMPATIBLE: Support for Python 2 has been removed.

  • We now ship manylinux2014 wheels and no longer ship manylinux1 wheels. Users should upgrade to the latest pip to ensure this doesn’t cause issues downloading wheels on their platform.

  • cryptography now incorporates Rust code. Users building cryptography themselves will need to have the Rust toolchain installed. Users who use an officially produced wheel will not need to make any changes. The minimum supported Rust version is 1.45.0.

  • cryptography now has PEP 484 type hints on nearly all of of its public APIs. Users can begin using them to type check their code with mypy.

3.3.2 - 2021-02-07

  • 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 Update: This fix is a workaround for CVE-2021-23840 in OpenSSL, fixed in OpenSSL 1.1.1j.

3.3.1 - 2020-12-09

  • Re-added a legacy symbol causing problems for older pyOpenSSL users.

3.3 - 2020-12-08

  • BACKWARDS INCOMPATIBLE: Support for Python 3.5 has been removed due to low usage and maintenance burden.

  • BACKWARDS INCOMPATIBLE: The GCM and 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 recover_data_from_signature() function to 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 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 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 load_pem_pkcs7_certificates() and load_der_pkcs7_certificates() .

  • Calling update or update_into on CipherContext with data longer than 231 bytes no longer raises an OverflowError. This also resolves the same issue in Fernet (symmetric encryption).

3.0 - 2020-07-20

  • BACKWARDS INCOMPATIBLE: Removed support for passing an Extension instance to 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 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 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 FAQ entry addressing this issue.

  • Added support for OpenSSH serialization format for ec, ed25519, rsa and dsa private keys: load_ssh_private_key() for loading and OpenSSH for writing.

  • Added support for OpenSSH certificates to load_ssh_public_key().

  • Added encrypt_at_time() and decrypt_at_time() to Fernet.

  • Added support for the SubjectInformationAccess X.509 extension.

  • Added support for parsing SignedCertificateTimestamps in OCSP responses.

  • Added support for parsing attributes in certificate signing requests via CertificateSigningRequest.get_attribute_for_oid.

  • Added support for encoding attributes in certificate signing requests via 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 serialize_key_and_certificates().

2.9.2 - 2020-04-22

  • Updated the macOS wheel to fix an issue where it would not run on macOS versions older than 10.15.

2.9.1 - 2020-04-21

  • Updated Windows, macOS, and manylinux wheels to be compiled with OpenSSL 1.1.1g.

2.9 - 2020-04-02

  • 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.

  • Updated Windows, macOS, and manylinux wheels to be compiled with OpenSSL 1.1.1f.

  • 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 setup.py 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 DHPrivateKey.

  • 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

  • BACKWARDS INCOMPATIBLE: 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 Installation for more details.

  • Added HKDFExpand.

  • Added CFB8 support for AES and TripleDES on commoncrypto and openssl.

  • Added AES CTR support to the OpenSSL backend when linked against 0.9.8.

  • Added PKCS8SerializationBackend and TraditionalOpenSSLSerializationBackend support to openssl.

  • Added Elliptic curve cryptography and EllipticCurveBackend.

  • Added ECB support for TripleDES on commoncrypto and openssl.

  • Deprecated the concrete RSAPrivateKey class in favor of backend specific providers of the cryptography.hazmat.primitives.asymmetric.rsa.RSAPrivateKey interface.

  • Deprecated the concrete RSAPublicKey in favor of backend specific providers of the cryptography.hazmat.primitives.asymmetric.rsa.RSAPublicKey interface.

  • Deprecated the concrete DSAPrivateKey class in favor of backend specific providers of the cryptography.hazmat.primitives.asymmetric.dsa.DSAPrivateKey interface.

  • Deprecated the concrete DSAPublicKey class in favor of backend specific providers of the cryptography.hazmat.primitives.asymmetric.dsa.DSAPublicKey interface.

  • Deprecated the concrete DSAParameters class in favor of backend specific providers of the cryptography.hazmat.primitives.asymmetric.dsa.DSAParameters interface.

  • Deprecated encrypt_rsa, decrypt_rsa, create_rsa_signature_ctx and create_rsa_verification_ctx on RSABackend.

  • Deprecated create_dsa_signature_ctx and create_dsa_verification_ctx on DSABackend.

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 openssl to the OS random engine.

  • Added CAST5 (CAST-128) support.

0.1 - 2014-01-08

  • Initial release.