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* X25519 Support (#3686)Paul Kehrer2017-06-091-0/+120
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * early days * sort of working * more things * remove private_bytes * public bytes, interface fix * load public keys * x25519 support basically done now * private_bytes is gone * some reminders * doctest this too * remove a thing that doesn't matter * x25519 supported checks * libressl has the NID, but a different API, so check for OpenSSL * pep8 * add missing coverage * update to use reasons * expand test a little * add changelog entry * review feedback
* ChaCha20Poly1305 support (#3680)Paul Kehrer2017-06-081-0/+142
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * chacha20poly1305 support * add chacha20poly1305 backend and some fixes * refactor * forgot to remove this * pep8 * review feedback and a lot of type/value checking * review feedback * raise unsupportedalgorithm when creating a ChaCha20Poly1305 object if it's not supported. * switch to ciphertext||tag * typo * remove a branch we don't need * review feedback * decrypts is *also* a word * use reasons
* Refs #3461 -- parse SCTs from x.509 extension (#3480)Alex Gaynor2017-06-041-0/+42
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * Stub API for SCTs, feedback wanted * grr, flake8 * finish up the __init__ * Initial implementation and tests * write a test. it fails because computer * get the tests passing and fix some TODOs * changelog entry * This can go now * Put a skip in this test * grump * Removed unreachable code * moved changelog to the correct section * Use the deocrator for expressing requirements * This needs f for the right entry_type * coverage * syntax error * tests for coverage * better sct eq tests * docs * technically correct, the most useless kind of correct * typo and more details * bug * drop __eq__
* deprecate signer/verifier on asymmetric keys (#3663)Paul Kehrer2017-06-033-6/+16
| | | | | | * deprecate signer/verifier on asymmetric keys * review feedback, switch deprecated_call to work around a bug
* call check_backend_support directly from backend fixture (#3666)Alex Gaynor2017-06-033-40/+15
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* Switched our backend to be a normal fixture in tests (#3665)Alex Gaynor2017-06-033-39/+17
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* make signature and verification contexts error better re: prehashed (#3658)Paul Kehrer2017-06-023-0/+57
| | | | | | * make signature and verification contexts error better re: prehashed * code review feedback
* Enlarge _oid2txt buffer to handle larger OIDs (#3612)Fraser Tweedale2017-05-291-0/+21
| | | | | | | | | The OpenSSL manual recommends a buffer size of 80 for OBJ_oid2txt: https://www.openssl.org/docs/crypto/OBJ_nid2ln.html#return_values. But OIDs longer than this occur in real life (e.g. Active Directory makes some very long OIDs). If the length of the stringified OID exceeds the buffer size, allocate a new buffer that is big enough to hold the stringified OID, and re-do the conversion into the new buffer.
* move MACContext to mac.py and eliminate interfaces.py (#3631)Paul Kehrer2017-05-291-0/+15
| | | | | | | | | | | | | * move MACContext to mac.py and eliminate interfaces.py finally * improve title * re-add and deprecate interfaces.MACContext * use pytest.warns instead of deprecated_call The pytest docs insist that deprecation warnings are handled differently and that you should use deprecated_call, but this works so okay then
* fix libressl error/refactor some error handling (#3609)Paul Kehrer2017-05-262-15/+8
| | | | | | | | | | | | | | | | | | | | | | | * add libre so I can see the error * add the libre error needed and refactor error handling a bit We were historically matching on lib + func + reason, but func is somewhat unstable so now we match on lib + reason only. Of course, in this case libressl changed both lib and reason so it wouldn't have mattered. All error handling from the error queue in openssl is an illusion * fix a typo, probably an unneeded branch * review feedback * refactor tests to support libressl insert additional rant about libre here, although admittedly these tests were assuming stability where openssl itself guarantees none * better assert, fix flake8
* jurisdictionCountryName also must be PrintableString (#3516)Alex Gaynor2017-05-251-0/+11
| | | | | | | | | | | | | | * jurisdictionCountryName also must be PrintableString * flake8 + citation * Write a test, which fails. If my analysis is correct, this is blocked on: https://github.com/openssl/openssl/pull/3284 * This is only true on 1.1.0 * clearly express the version requirement
* Removed branches that are now unused (#3589)Alex Gaynor2017-05-241-3/+0
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* add convenience methods for key_size on EC{Public,Private}Key (#3587)Paul Kehrer2017-05-231-0/+9
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* Bump the minimum PyPy/cffi version and simplify as a result (#3585)Alex Gaynor2017-05-232-54/+0
| | | | | | | | * Bump the minimum PyPy/cffi version and simplify as a result * unused imports * grumble, fix
* Close stdout and stderr when spawning a process (#3578)Alex Gaynor2017-05-231-9/+13
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* More deprecation warnings (#3579)Alex Gaynor2017-05-231-7/+3
| | | | | | * Fixed more deprecation warnings * unused import
* Delete some code (#3563)Alex Gaynor2017-05-203-72/+8
| | | | | | | | * Delete some code * removed import * delete more code
* Fixed #3533 -- made GCM mode object immutable (#3553)Alex Gaynor2017-05-201-1/+23
| | | | | | | | | | | | | | | | | | | | | | | | * Fixed #3533 -- made GCM mode object immutable * flake8 * Fix for older openssl * fix * fix * sigh, fix * fixed * dropped negation * computers are bad * A test * This implements an interface
* remove multibackend (#3555)Paul Kehrer2017-05-205-692/+2
| | | | | | | | * remove multibackend * oops * goodbye pointless tests
* time to remove commoncrypto, fare thee well (#3551)Paul Kehrer2017-05-205-117/+2
| | | | | | | | | | | | | | | | * time to remove commoncrypto, fare thee well * remove even more * update the changelog * remove more things * don't need this function * remove CAST5 CTR tests since that was only supported in commoncrypto * assert a thing
* Don't raise an UnsupportedExtension for critical extensions. (#3550)Alex Gaynor2017-05-202-10/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | * Don't raise an UnsupportedExtension for critical extensions. Fixes #2903 Fixes #2901 Fixes #3325 * Don't link * Revert "Don't link" This reverts commit 4fe847f91d9dd45cdc28a4984c4e44aad62a5de6. * fix * Revert "Revert "Don't link"" This reverts commit 856031b5a1fbad04ac218fa94ebf37dcd402f3ed. * fix * Deprecate this * Better changelog entry
* Don't skip DH tests when dhx unsupported and no dhx is required (#3484)Aviv Palivoda2017-05-191-17/+35
| | | | | | * Don't skip DH tests when dhx unsupported and no dhx is required * Add is_dhx parameter
* Fixes #3538 -- Make our OpenSSL EC verifier's implementation match the API ↵Alex Gaynor2017-05-101-1/+1
| | | | | | | | | | | | | | (#3539) * Document our real API for EC verification, not an accident * formatting consistency * fix the code itself * fixed class name * fixed a test too
* use openssl constants (#3534)Paul Kehrer2017-05-031-6/+15
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* postpone GCM authentication tag requirement until finalization (#3421)Philipp Gesang2017-05-022-2/+96
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * postpone GCM authentication tag requirement until finalization Add a .finalize_with_tag() variant of the .finalize() function of the GCM context. At the same time, do not enforce the requirement of supplying the tag with the mode ctor. This facilitates streamed decryption when the MAC is appended to the ciphertext and cannot be efficiently retrieved ahead of decryption. According to the GCM spec (section 7.2: “Algorithm for the Authenticated Decryption Function”), the tag itself is not needed until the ciphertext has been decrypted. Addresses #3380 Signed-off-by: Philipp Gesang <philipp.gesang@intra2net.com> * disallow delayed GCM tag passing for legacy OpenSSL Old versions of Ubuntu supported by Cryptography ship a v1.0.1 of OpenSSL which is no longer supported by upstream. This library seems to cause erratic test failures with the delayed GCM tag functionality which are not reproducible outside the CI. Unfortunately OpenSSL v1.0.1 does not even document the required API (``EVP_EncryptInit(3)``) so there is no by-the-book fix. For backends of version 1.0.1 and earlier, verify the GCM tag at the same stage as before. Also, indicate to the user that late passing of GCM tags is unsupported by throwing ``NotImplementedError`` for these backend versions if - the method ``finalize_with_tag()`` is invoked, or - the mode ctor is called without passing a tag. Unit tests have been adapted to account for different backend versions.
* Don't compare cffi version using strings (#3524)Alex Gaynor2017-04-292-5/+3
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* Attempt to simplify the libressl checing (#3482)Alex Gaynor2017-03-262-12/+3
| | | | | | | | | | * Attempt to simplify the libressl checing * SHENANGINS * Attempted fix * More simplification
* Remove API deprecated in 1.6, clean up the legacy deprecations (#3468)Alex Gaynor2017-03-212-13/+2
| | | | | | * Remove API deprecated in 1.6, clean up the legacy deprecations * flake8, unused import
* Write a memory leak test for X.509 extensions (#3451)Alex Gaynor2017-03-161-0/+22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * Bind a pair of mem functions. * do the conditional correctly * move to the right section * Get the code basically working * flake8 * say the correct incantation * WOrkaround for hilarity * Revert "WOrkaround for hilarity" This reverts commit 37b9f3b4ed4063eef5add3bb5d5dd592a007d439. * Swap out these functions for the originals * nonsense for windows * try writing this all out for windows * Debugging utility * Avoid this mess, don't dlopen anything * Throw away this FFI entirely * first pass at some x.509 memleak tests * TODO and fix * Get the tests to passing * String formatting is nasty * some fixes because rebasing * fix for the name API, always use the OpenSSL backend
* Improvements to the memleak tests (#3457)Alex Gaynor2017-03-151-10/+15
| | | | | | | | | * Improvements to the memleak tests * Support passing args * Do more initialization before looking for at the heap * Don't use default_backend for something OpenSSL specific
* Ec is a thing (#3453)Alex Gaynor2017-03-151-23/+1
| | | | | | | | | | | | | | | | * We always have EC * We always have ECDH * We always have ECDSA * We always have EC codes * This can go as well * And this * unused import
* Memleak tests (#3140)Alex Gaynor2017-03-141-0/+160
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * Bind a pair of mem functions. * make these conditional * do the conditional correctly * move to the right section * I'm not saying libressl should be illegal, but it is annoying * sigh, typo * first cut at memleak tests. doesn't work * hack around the previous error, onto the next one * drop the pointless restoration of the original functions * Don't try to use the previous malloc functions. The default malloc is CRYPTO_malloc which calls the custom ptr you provided, so it just recurses forever. * flake8 * Get the code basically working * flake8 * say the correct incantation * Don't try to run on old OpenSSL * Flushing this is a good idea * Fixed a py2.7+ism * GRRRRR * WOrkaround for hilarity * Revert "WOrkaround for hilarity" This reverts commit 37b9f3b4ed4063eef5add3bb5d5dd592a007d439. * Swap out these functions for the originals * py3k fix * flake8 * nonsense for windows * py3k * seperate stdout and stderr because py26 has a warning on stderr * try writing this all out for windows * useful error messages * Debugging utility * Avoid this mess, don't dlopen anything * consistency * Throw away this FFI entirely * some useful comments
* reverts a change to our exceptions (#3429)Paul Kehrer2017-03-092-22/+11
| | | | | Trying to be too specific about why key loading fails is very difficult when you're using the same logic across DH, EC, RSA, and DSA. This makes it less fancy.
* missing coverage for dh_x942_serialization_supported in MultiBackend (#3432)Paul Kehrer2017-03-081-0/+1
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* DH subgroup order (q) (#3369)Aviv Palivoda2017-03-054-33/+243
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * Support DH q (subgroup order) * Change RFC5114.txt to NIST format * Add tests for DH q * Update docs for DH q * Fix pep8 * Improve test covergae for DH q * Create _dh_params_dup that copy q if DHparams_dup don't On OpenSSL < 1.0.2 DHparams_dup don't copy q. _dh_params_dup call DHparams_dup and if the version is smaller than 1.0.2 copy q manually * Copy q manually on libressl * Add to test vectors serialized RFC5114 2048 bit DH parameters with 224 bit subgroup * Support serialization of DH with q * Add tests for serialization of DH with q * Support DH serialization with q only if Cryptography_HAS_EVP_PKEY_DHX is true * Raise exception when trying to serialize DH X9.42 when not supported * raise unsupported key type when deserilizing DH X9.42 if not supported * pep8 fixes * Fix test_serialization * Add dhx_serialization_supported method to DHBacked * document q in dh_parameters_supported * Rename dhx_serialization_supported to dh_x942_serialization_supported
* add support for update_into on CipherContext (#3190)Paul Kehrer2017-02-162-3/+170
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * add support for update_into on CipherContext This allows you to provide your own buffer (like recv_into) to improve performance when repeatedly calling encrypt/decrypt on large payloads. * another skip_if * more skip_if complexity * maybe do this right * correct number of args * coverage for the coverage gods * add a cffi minimum test tox target and travis builder This tests against macOS so we capture some commoncrypto branches * extra arg * need to actually install py35 * fix * coverage for GCM decrypt in CC * no longer relevant * 1.8 now * pep8 * dramatically simplify * update docs * remove unneeded test * changelog entry * test improvements * coverage fix * add some comments to example * move the comments to their own line * fix and move comment
* Refactor binding initialization to allow specified errors (#3278)Paul Kehrer2017-02-131-1/+13
| | | | | | | | | If pyca/cryptography sees any errors on the error stack during its own initialization it immediately raises InternalError and refuses to proceed. This was a safety measure since we weren't sure if it was safe to proceed. However, reality has intervened and we have to bow to the god of pragmatism and just clear the error queue. In practice this is safe since we religiously check the error queue in operation.
* switch the PEM password callback to a C implementation (#3382)Paul Kehrer2017-02-131-15/+24
| | | | | | | | | | | | | | | * switch the PEM password callback to a C implementation Calling from C to Python is fraught with edge cases, especially in subinterpreter land. This commit moves the PEM password callback logic into a small C function and then removes all the infrastructure for the cffi callbacks (as we no longer have any) * review feedback and update tests * rename the struct * aaand one more fix
* enforce password must be bytes when loading PEM/DER asymmetric keys (#3383)Paul Kehrer2017-02-082-1/+40
| | | | | | | | | | * enforce password must be bytes when loading PEM/DER asymmetric keys Previously we were using an ffi.buffer on the Python string, which was allowing text implicitly, but our documentation explicitly requires bytes. * add changelog entry
* replace pyasn1 with asn1crypto (#3361)Ofek Lev2017-02-082-16/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | * replace pyasn1 with asn1crypto * allow trailing bytes * fix x509 test * update CHANGELOG.rst * fix assert * make asn1crypto code more idiomatic * find tag * final clean-up * leave trailing byte logic unchanged * document dependency change * spelling * fix spelling
* DH serialization (#3297)Aviv Palivoda2017-02-071-1/+244
| | | | | | | | | | | | | | | | | | * DH keys support serialization * Add DH serialization documentation * Add tests for DH keys serialization in DER encoding * update version to 1.8 * Allow only SubjectPublicKeyInfo serialization * Remove support in TraditionalOpenSSL format * Fix pep8 * Refactor dh serialization tests
* add memory limit check for scrypt (#3328)Paul Kehrer2017-01-051-1/+22
| | | | | | | | | | * add memory limit check for scrypt fixes #3323 * test a pass * move _MEM_LIMIT to the scrypt module
* add openssl_version_number & doc openssl_version_text (#3329)Paul Kehrer2016-12-211-0/+3
| | | | | | | | | | * add openssl_version_number & doc openssl_version_text fixes #3315 * more docs + actually assert on the test... * text
* Drop 1.0.0 (#3312)Alex Gaynor2016-12-134-177/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * delete the 1.0.0 support * drop the version check * drop the AES-CTR stuff * Update the example * openssl truncates for us now * delete unused test * unused imports * Remove a bunch of conditional bindings for NPN * no more 1.0.0 builders * libressl fix * update the docs * remove dead branches * oops * this is a word, damnit * spelling * try removing this * this test is not needed * unused import
* fix a regression in int_from_bytes (#3316)Paul Kehrer2016-12-131-0/+11
| | | | | | * fix a regression in int_from_bytes * add a new test file
* New osrandom_engine in C (#3229)Christian Heimes2016-12-091-13/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * New osrandom_engine in C Inspired by Python/random.c and the old implementation. Signed-off-by: Christian Heimes <christian@python.org> * osrandom_engine * Fix naming bug caused by search 'n replace mistake * Make it easier to override osrandom auto-detection * Add engine ctrl and backend API to get implementation from ENGINE Signed-off-by: Christian Heimes <christian@python.org> * Better test coverage, documentation, LICENSE Signed-off-by: Christian Heimes <christian@python.org> * Coverage is hard. Signed-off-by: Christian Heimes <christian@python.org> * * enable win32 check * read() returns size_t Signed-off-by: Christian Heimes <christian@python.org> * Add macOS to spelling list. Remove dead code from header file. Signed-off-by: Christian Heimes <christian@python.org> * remove CCRandomGenerateBytes path and update getentropy to work on macOS This change allows us to test all the engines in our CI: * getentropy (tested by macOS sierra) * getrandom (tested on several linux builders) * /dev/urandom (tested on FreeBSD, OS X 10.11 and below, & older linux) * CryptGenRandom (tested on windows builders) I also fixed bugs preventing compilation in the getentropy code * getentropy() returns int and is restricted to 256 bytes on macOS, too. Signed-off-by: Christian Heimes <christian@python.org> * add versionadded * Re-add import of os module * Fixes related to Alex's recent review. Signed-off-by: Christian Heimes <christian@python.org> * Add error reporting and fail for EAGAIN Add error reporting strings for various error cases. This gives us much nicer and understandable error messages. SYS_getrandom() EAGAIN is now an error. Cryptography refuses to initialize its osrandom engine when the Kernel's CPRNG hasn't been seeded yet. Signed-off-by: Christian Heimes <christian@python.org>
* friendly error if you put a date too far in the future on windows (#3279)Paul Kehrer2016-12-051-0/+30
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* OpenSSL DH backend implementation [Second attempt] (#2914)Aviv Palivoda2016-11-262-15/+250
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * Start of OpenSSL DH backend implementation * Supporting DH in MultiBackend * DHBackend has dh_parameters_supported method * Removed DHParametersWithNumbers and DHPrivateKeyWithNumbers from documentation * Removed ExchangeContext. exchange is a method of DHPrivateKeyWithSerialization * PEP8 fixes * Fixed TestDH.test_bad_tls_exchange * Fixed generate_private_key reference in dh documentation * test DH multibackend support * testing DH coversion to serialized * Validating that we receive serialized class in test_generate_dh * Testing DH exchange symmetric key padding * struct DH is now opaqued * PEP8 fixes * Testing load_dh_private_numbers throws ValueError when DH_check fails * Using openssl_assert * Passing keywords arguments in DH key exchange example * test_dh::test_bad_tls_exchange now uses pre calculated parameters * TestDH - Add test that the computed secret is equivalent to the definition by comparing with secret computed in pure python * Add missing generator parameter to DHBackend interface docs. * Include parameter type in DHBackend abc docs. * Add docs for dh.generate_parameters function * Remove the dh Numbers section, and move the DHNumbers class docs to where they are first used. * Add note of big endian byte packing to DH exchange method. * DH documentation updates. Add single sentence overview with wikipedia link. Add paragraph on assembling using Numbers objects. Add link to backend interface docs. First section was all indented, I think by mistake. * Add exchange method to DHPrivateKey abstract base class. * Small tweaks to DH documentation - remove Provider. * Add endian to dictionary * Use utils.int_from_bytes in test_tls_exchange_algorithm * Removed duplicate line * Change dh.rst exchange algorithm from doctest to code-block The example in the Diffie-Hellman exhange algorithm is using 2048 bits key. Generating the parameters of 2048 takes long time. This caused the automated tests to fail. In order to pass the tests we change the example to code-block so it will not run in the doc tests. * Fix dh docs * Document the generator in DHBackend relevant methods * Fix dh tests * use DHparams_dup * Fix key type to unsigned char as expected by DH_compute_key * Validate that DH generator is 2 or 5 * test dh exchange using botan vectors * group all numbers classes * Simplify _DHPrivateKey * Rename test with serialized to numbers * Move bad exchange params to external vector file * update exchange versionadded to 1.7 * Make key_size bit accurate * Change botan link * Added CHANGELOG entry
* Error out on OpenSSL 1.0.0 by default (#3276)Alex Gaynor2016-11-221-1/+7
| | | | | | * Error out on OpenSSL 1.0.0 by default * what the heck
* error if private_value is <= 0 in ec.derive_private_key (#3273)Paul Kehrer2016-11-211-0/+3
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