3.9.6:
Resolved issues
* Fix building of wheels for OSX by explicitly setting `sysroot` location.
3.9.5:
Resolved issues
* RSA OAEP decryption was not verifying that all ``PS`` bytes are zero.
* GH-372: fixed memory leak for operations that use memoryviews when `cffi` is not installed.
* Fixed wrong ASN.1 OID for HMAC-SHA512 in PBE2.
New features
* Updated Wycheproof test vectors to version 0.8r12.
3.9.4:
Resolved issues
* Prevent ``key_to_english`` from creating invalid data when fed with
keys of length not multiple of 8.
* Fix blocking RSA signing/decryption when key has very small factor.
3.9.0:
New features
* Add support for loading PEM files encrypted with AES256-CBC.
* Add support for XChaCha20 and XChaCha20-Poly1305 ciphers.
* Add support for bcrypt key derivation function (`Crypto.Protocol.KDF.bcrypt`).
* Add support for left multiplication of an EC point by a scalar.
* Add support for importing ECC and RSA keys in the new OpenSSH format.
Resolved issues
* it was not possible to invert an EC point anymore.
* fix printing of DSA keys.
* `DSA.generate()` was not always using the `randfunc` input.
* the MD2 hash had block size of 64 bytes instead of 16; as result the HMAC construction gave incorrect results.
3.8.1:
New features
* Add support for loading PEM files encrypted with AES192-CBC, AES256-CBC, and AES256-GCM.
* When importing ECC keys, ignore EC PARAMS section that was included by some openssl commands.
3.8.0:
New features
* Speed-up ECC performance. ECDSA is 33 times faster on the NIST P-256 curve.
* Added support for NIST P-384 and P-521 curves.
* EccKey has new methods size_in_bits() and size_in_bytes().
* Support HMAC-SHA224, HMAC-SHA256, HMAC-SHA384, and HMAC-SHA512 in PBE2/PBKDF2.
Resolved issues
* DER objects were not rejected if their length field had a leading zero.
* Allow legacy RC2 ciphers to have 40-bit keys.
* ASN.1 Object IDs did not allow the value 0 in the path.
Breaks in compatibility
* point_at_infinity() becomes an instance method for Crypto.PublicKey.ECC.EccKey, from a static one.
3.7.3:
Resolved issues
False positive on PSS signatures when externally provided salt is too long.
Include type stub files for Crypto.IO and Crypto.Util.
3.7.1:
New features
Added type stubs to enable static type checking with mypy.
New update_after_digest flag for CMAC.
Resolved issues
Fixed problem with gcc 4.x when compiling ghash_clmul.c.
Incorrect digest value produced by CMAC after cloning the object.
Method update() of an EAX cipher object was returning the underlying CMAC object, instead of the EAX object itself.
Method update() of a CMAC object was not throwing an exception after the digest was computed (with digest() or verify()).
3.7.0:
New features
* Added support for Poly1305 MAC (with AES and ChaCha20 ciphers for key derivation).
* Added support for ChaCha20-Poly1305 AEAD cipher.
* New parameter output for Crypto.Util.strxor.strxor, Crypto.Util.strxor.strxor_c,
encrypt and decrypt methods in symmetric ciphers (Crypto.Cipher package).
output is a pre-allocated buffer (a bytearray or a writeable memoryview)
where the result must be stored.
This requires less memory for very large payloads; it is also more efficient when
encrypting (or decrypting) several small payloads.
Resolved issues
* AES-GCM hangs when processing more than 4GB at a time on x86 with PCLMULQDQ instruction.
Breaks in compatibility
* Drop support for Python 3.3.
* Remove Crypto.Util.py3compat.unhexlify and Crypto.Util.py3compat.hexlify.
* With the old Python 2.6, use only ctypes (and not cffi) to interface to native code.
3.6.4:
New features
* Build Python 3.7 wheels on Linux, Windows and Mac.
Resolved issues
* Rename _cpuid module to make upgrades more robust.
* More meaningful exceptions in case of mismatch in IV length (CBC/OFB/CFB modes).
* Fix compilation issues on Solaris 10/11.
3.6.3:
Resolved issues
GH175: Fixed incorrect results for CTR encryption/decryption with more than 8 blocks.
3.6.2:
New features
ChaCha20 accepts 96 bit nonces (in addition to 64 bit nonces) as defined in RFC7539.
Accelerate AES-GCM on x86 using PCLMULQDQ instruction.
Accelerate AES-ECB and AES-CTR on x86 by pipelining AESNI instructions.
As result of the two improvements above, on x86 (Broadwell):
AES-ECB and AES-CTR are 3x faster
AES-GCM is 9x faster
Resolved issues
On Windows, MPIR library was stilled pulled in if renamed to gmp.dll.
Breaks in compatibility
In Crypto.Util.number, functions floor_div and exact_div have been removed. Also, ceil_div is limited to non-negative terms only.
3.6.1:
New features
Added Google Wycheproof tests (https://github.com/google/wycheproof) for RSA, DSA, ECDSA, GCM, SIV, EAX, CMAC.
New parameter mac_len (length of MAC tag) for CMAC.
Resolved issues
In certain circumstances (at counter wrapping, which happens on average after 32 GBi) AES GCM produced wrong ciphertexts.
Method encrypt() of AES SIV cipher could be still called, whereas only encrypt_and_digest() should be allowed.
3.6.0:
New features
Introduced export_key and deprecated exportKey for DSA and RSA key objects.
Ciphers and hash functions accept memoryview objects in input.
Added support for SHA-512/224 and SHA-512/256.
Resolved issues
Reintroduced Crypto.__version__ variable as in PyCrypto.
Fixed compilation problem with MinGW.
New features
* Import and export of ECC curves in compressed form.
* The initial counter for a cipher in CTR mode can be a byte string (in addition to an integer).
* Faster PBKDF2 for HMAC-based PRFs (at least 20x for short passwords, more for longer passwords). Thanks to Christian Heimes for pointing out the implementation was under-optimized.
* The salt for PBKDF2 can be either a string or bytes.
Resolved issues
* Without libgmp, modular exponentiation (since v3.4.8) crashed on 32-bit big-endian systems.
Breaks in compatibility
* Removed support for Python < 2.6.
3.4.8:
New features
* Added a native extension in pure C for modular exponentiation, optimized for SSE2 on x86.
In the process, we drop support for the arbitrary arithmetic library MPIR
on Windows, which is painful to compile and deploy.
The custom modular exponentiation is 130% (160%) slower on an Intel CPU in 32-bit (64-bit) mode,
compared to MPIR. Still, that is much faster that CPython's own `pow()` function which
is 900% (855%) slower than MPIR. Support for the GMP library on Unix remains.
* Added support for *manylinux* wheels.
* Support for Python 3.7.
Resolved issues
* The DSA parameter 'p' prime was created with 255 bits cleared
(but still with the correct strength).
* Not all docs were included in the tar ball.
* ECDSA verification failed for DER encoded signatures.
* Human-friendly messages for padding errors with ECB and CBC.
The library can also be compiled using MinGW.
Removed use of alloca().
[Security] Removed implementation of deprecated "quick check" feature of PGP block cipher mode.
Improved the performance of scrypt by converting some Python to C.
