Changelog¶
3.6.1 (15 April 2018)¶
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 onlyencrypt_and_digest()
should be allowed.
3.6.0 (8 April 2018)¶
New features¶
- Introduced
export_key
and deprecatedexportKey
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.
3.5.1 (8 March 2018)¶
Resolved issues¶
- GH#142. Fix mismatch with declaration and definition of addmul128.
3.5.0 (7 March 2018)¶
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 (GH#67).
- Ciphers and hash functions accept data as bytearray, not just binary strings.
- The old SHA-1 and MD5 hash functions are available even when Python’s own hashlib does not include them.
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.
3.4.12 (5 February 2018)¶
Resolved issues¶
- GH#129. pycryptodomex could only be installed via wheels.
3.4.11 (5 February 2018)¶
Resolved issues¶
- GH#121. the record list was still not correct due to PEP3147 and __pycache__ directories. Thanks again to John O’Brien.
3.4.10 (2 February 2018)¶
Resolved issues¶
- When creating ElGamal keys, the generator wasn’t a square residue: ElGamal encryption done with those keys cannot be secure under the DDH assumption. Thanks to Weikeng Chen.
3.4.9 (1 February 2018)¶
New features¶
- More meaningful error messages while importing an ECC key.
Resolved issues¶
- GH#123 and #125. The SSE2 command line switch was not always passed on 32-bit x86 platforms.
- GH#121. The record list (–record) was not always correctly filled for the pycryptodomex package. Thanks to John W. O’Brien.
3.4.8 (27 January 2018)¶
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).
- GH#106. Not all docs were included in the tar ball. Thanks to Christopher Hoskin.
- GH#109. ECDSA verification failed for DER encoded signatures. Thanks to Alastair Houghton.
- Human-friendly messages for padding errors with ECB and CBC.
3.4.7 (26 August 2017)¶
New features¶
- API documentation is made with sphinx instead of epydoc.
- Start using
importlib
instead ofimp
where available.
Resolved issues¶
- GH#82. Fixed PEM header for RSA/DSA public keys.
3.4.6 (18 May 2017)¶
Resolved issues¶
- GH#65. Keccak, SHA3, SHAKE and the seek functionality for ChaCha20 were not working on big endian machines. Fixed. Thanks to Mike Gilbert.
- A few fixes in the documentation.
3.4.4 (1 February 2017)¶
Resolved issues¶
- 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.
3.4.3 (17 October 2016)¶
Resolved issues¶
- Undefined warning was raised with libgmp version < 5
- Forgot inclusion of
alloca.h
- Fixed a warning about type mismatch raised by recent versions of cffi
3.4.1 (21 February 2016)¶
New features¶
- Added option to install the library under the
Cryptodome
package (instead ofCrypto
).
3.4 (7 February 2016)¶
New features¶
- Added
Crypto.PublicKey.ECC
module (NIST P-256 curve only), including export/import of ECC keys. - Added support for ECDSA (FIPS 186-3 and RFC6979).
- For CBC/CFB/OFB/CTR cipher objects,
encrypt()
anddecrypt()
cannot be intermixed. - CBC/CFB/OFB, the cipher objects have both
IV
andiv
attributes.new()
acceptsIV
as well asiv
as parameter. - For CFB/OPENPGP cipher object,
encrypt()
anddecrypt()
do not require the plaintext or ciphertext pieces to have length multiple of the CFB segment size. - Added dedicated tests for all cipher modes, including NIST test vectors
- CTR/CCM/EAX/GCM/SIV/Salsa20/ChaCha20 objects expose the
nonce
attribute. - For performance reasons, CCM cipher optionally accepted a pre-declaration of the length of the associated data, but never checked if the actual data passed to the cipher really matched that length. Such check is now enforced.
- CTR cipher objects accept parameter
nonce
and possiblyinitial_value
in alternative tocounter
(which is deprecated). - All
iv
/IV
andnonce
parameters are optional. If not provided, they will be randomly generated (exception:nonce
for CTR mode in case of block sizes smaller than 16 bytes). - Refactored ARC2 cipher.
- Added
Crypto.Cipher.DES3.adjust_key_parity()
function. - Added
RSA.import_key
as an alias to the deprecatedRSA.importKey
(same for theDSA
module). - Added
size_in_bits()
andsize_in_bytes()
methods toRsaKey
.
Resolved issues¶
- RSA key size is now returned correctly in
RsaKey.__repr__()
method (kudos to hannesv). - CTR mode does not modify anymore
counter
parameter passed tonew()
method. - CTR raises
OverflowError
instead ofValueError
when the counter wraps around. - PEM files with Windows newlines could not be imported.
Crypto.IO.PEM
andCrypto.IO.PKCS8
used to accept empty passphrases.- GH#6: NotImplementedError now raised for unsupported methods
sign
,verify
,encrypt
,decrypt
,blind
,unblind
andsize
in objectsRsaKey
,DsaKey
,ElGamalKey
.
Breaks in compatibility¶
- Parameter
segment_size
cannot be 0 for the CFB mode. - For OCB ciphers, a final call without parameters to
encrypt
must end a sequence of calls toencrypt
with data (similarly fordecrypt
). - Key size for
ARC2
,ARC4
andBlowfish
must be at least 40 bits long (still very weak). - DES3 (Triple DES module) does not allow keys that degenerate to Single DES.
- Removed method
getRandomNumber
inCrypto.Util.number
. - Removed module
Crypto.pct_warnings
. - Removed attribute
Crypto.PublicKey.RSA.algorithmIdentifier
.
3.3.1 (1 November 2015)¶
New features¶
- Opt-in for
update()
afterdigest()
for SHA-3, keccak, BLAKE2 hashes
Resolved issues¶
- Removed unused SHA-3 and keccak test vectors, therefore significantly reducing the package from 13MB to 3MB.
Breaks in compatibility¶
- Removed method
copy()
from BLAKE2 hashes - Removed ability to
update()
a BLAKE2 hash after the first call to(hex)digest()
3.3 (29 October 2015)¶
New features¶
- Windows wheels bundle the MPIR library
- Detection of faults occuring during secret RSA operations
- Detection of non-prime (weak) q value in DSA domain parameters
- Added original Keccak hash family (b=1600 only). In the process, simplified the C code base for SHA-3.
- Added SHAKE128 and SHAKE256 (of SHA-3 family)
Resolved issues¶
- GH#3: gcc 4.4.7 unhappy about double typedef
Breaks in compatibility¶
- Removed method
copy()
from all SHA-3 hashes - Removed ability to
update()
a SHA-3 hash after the first call to(hex)digest()
3.2 (6 September 2015)¶
New features¶
- Added hash functions BLAKE2b and BLAKE2s.
- Added stream cipher ChaCha20.
- Added OCB cipher mode.
- CMAC raises an exception whenever the message length is found to be too large and the chance of collisions not negligeable.
- New attribute
oid
for Hash objects with ASN.1 Object ID - Added
Crypto.Signature.pss
andCrypto.Signature.pkcs1_15
- Added NIST test vectors (roughly 1200) for PKCS#1 v1.5 and PSS signatures.
Resolved issues¶
- tomcrypt_macros.h asm error #1
Breaks in compatibility¶
- Removed keyword
verify_x509_cert
from module methodimportKey
(RSA and DSA). - Reverted to original PyCrypto behavior of method
verify
inPKCS1_v1_5
andPKCS1_PSS
.
3.1 (15 March 2015)¶
New features¶
- Speed up execution of Public Key algorithms on PyPy, when backed by the Gnu Multiprecision (GMP) library.
- GMP headers and static libraries are not required anymore at the time PyCryptodome is built. Instead, the code will automatically use the GMP dynamic library (.so/.DLL) if found in the system at runtime.
- Reduced the amount of C code by almost 40% (4700 lines). Modularized and simplified all code (C and Python) related to block ciphers. Pycryptodome is now free of CPython extensions.
- Add support for CI in Windows via Appveyor.
- RSA and DSA key generation more closely follows FIPS 186-4 (though it is not 100% compliant).
Resolved issues¶
- None
Breaks in compatibility¶
- New dependency on ctypes with Python 2.4.
- The
counter
parameter of a CTR mode cipher must be generated viaCrypto.Util.Counter
. It cannot be a generic callable anymore. - Removed the
Crypto.Random.Fortuna
package (due to lack of test vectors). - Removed the
Crypto.Hash.new
function. - The
allow_wraparound
parameter ofCrypto.Util.Counter
is ignored. An exception is always generated if the counter is reused. DSA.generate
,RSA.generate
andElGamal.generate
do not accept theprogress_func
parameter anymore.- Removed
Crypto.PublicKey.RSA.RSAImplementation
. - Removed
Crypto.PublicKey.DSA.DSAImplementation
. - Removed ambiguous method
size()
from RSA, DSA and ElGamal keys.
3.0 (24 June 2014)¶
New features¶
- Initial support for PyPy.
- SHA-3 hash family based on the April 2014 draft of FIPS 202.
See modules
Crypto.Hash.SHA3_224/256/384/512
. Initial Keccak patch by Fabrizio Tarizzo. - Salsa20 stream cipher. See module
Crypto.Cipher.Salsa20
. Patch by Fabrizio Tarizzo. - Colin Percival’s
scrypt
key derivation function (Crypto.Protocol.KDF.scrypt
). - Proper interface to FIPS 186-3 DSA. See module
Crypto.Signature.DSS
. - Deterministic DSA (RFC6979). Again, see
Crypto.Signature.DSS
. - HMAC-based Extract-and-Expand key derivation function
(
Crypto.Protocol.KDF.HKDF
, RFC5869). - Shamir’s Secret Sharing protocol, compatible with ssss (128 bits only).
See module
Crypto.Protocol.SecretSharing
. - Ability to generate a DSA key given the domain parameters.
- Ability to test installation with a simple
python -m Crypto.SelfTest
.
Resolved issues¶
- LP#1193521:
mpz_powm_sec()
(and Python) crashed when modulus was odd. - Benchmarks work again (they broke when ECB stopped working if an IV was passed. Patch by Richard Mitchell.
- LP#1178485: removed some catch-all exception handlers. Patch by Richard Mitchell.
- LP#1209399: Removal of Python wrappers caused HMAC to silently produce the wrong data with SHA-2 algorithms.
- LP#1279231: remove dead code that does nothing in SHA-2 hashes. Patch by Richard Mitchell.
- LP#1327081: AESNI code accesses memory beyond buffer end.
- Stricter checks on ciphertext and plaintext size for textbook RSA (kudos to sharego).
Breaks in compatibility¶
Removed support for Python < 2.4.
Removed the following methods from all 3 public key object types (RSA, DSA, ElGamal):
sign
verify
encrypt
decrypt
blind
unblind
Code that uses such methods is doomed anyway. It should be fixed ASAP to use the algorithms available in
Crypto.Signature
andCrypto.Cipher
.The 3 public key object types (RSA, DSA, ElGamal) are now unpickable.
Symmetric ciphers do not have a default mode anymore (used to be ECB). An expression like
AES.new(key)
will now fail. If ECB is the desired mode, one has to explicitly useAES.new(key, AES.MODE_ECB)
.Unsuccessful verification of a signature will now raise an exception [reverted in 3.2].
Removed the
Crypto.Random.OSRNG
package.Removed the
Crypto.Util.winrandom
module.Removed the
Crypto.Random.randpool
module.Removed the
Crypto.Cipher.XOR
module.Removed the
Crypto.Protocol.AllOrNothing
module.Removed the
Crypto.Protocol.Chaffing
module.Removed the parameters
disabled_shortcut
andoverflow
fromCrypto.Util.Counter.new
.
Other changes¶
Crypto.Random
stops being a userspace CSPRNG. It is now a pure wrapper overos.urandom
.- Added certain resistance against side-channel attacks for GHASH (GCM) and DSA.
- More test vectors for
HMAC-RIPEMD-160
. - Update
libtomcrypt
headers and code to v1.17 (kudos to Richard Mitchell). - RSA and DSA keys are checked for consistency as they are imported.
- Simplified build process by removing autoconf.
- Speed optimization to PBKDF2.
- Add support for MSVC.
- Replaced HMAC code with a BSD implementation. Clarified that starting from the fork, all contributions are released under the BSD license.