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* add a changelog entry for finalize_with_tag and move the note (#3531)Paul Kehrer2017-05-021-4/+4
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* postpone GCM authentication tag requirement until finalization (#3421)Philipp Gesang2017-05-021-8/+48
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 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.
* Update symmetric-encryption.rst (#3479)gdmnbt2017-03-231-0/+1
| | | | | | | | | | * Update symmetric-encryption.rst Import default_backend so the example works out-of-the-box. * Update symmetric-encryption.rst * newline nit
* Be on brand: it's macOS (#3456)Alex Gaynor2017-03-153-4/+4
| | | | | | * Be on brand: it's macOS * line wrap
* fix typo (#3442)Ofek Lev2017-03-121-1/+1
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* DH subgroup order (q) (#3369)Aviv Palivoda2017-03-052-5/+22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 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
* Update NIST urls in docs (#3418)Alex Gaynor2017-02-272-3/+3
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* SHA-1 is broken, run for the hills (#3417)Alex Gaynor2017-02-231-15/+16
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* Use HTTPS urls for a few more websites (#3416)Alex Gaynor2017-02-231-1/+1
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* Two random grammar fixes (#3402)Alex Gaynor2017-02-181-1/+1
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* add support for update_into on CipherContext (#3190)Paul Kehrer2017-02-161-0/+43
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 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
* DH serialization (#3297)Aviv Palivoda2017-02-071-0/+46
| | | | | | | | | | | | | | | | | | * 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 openssl_version_number & doc openssl_version_text (#3329)Paul Kehrer2016-12-211-0/+14
| | | | | | | | | | * add openssl_version_number & doc openssl_version_text fixes #3315 * more docs + actually assert on the test... * text
* Drop 1.0.0 (#3312)Alex Gaynor2016-12-132-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 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
* document DHBackend is implemented for OpenSSL (#3304)Paul Kehrer2016-12-111-0/+1
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* Scrypt docs code example contradict RFC 7914 (#3302) (#3303)Nick Badger2016-12-101-12/+14
| | | | | | | | | | | | * Scrypt docs code example contradict RFC 7914 (#3302) * More secure example difficulty of parameter n in scrypt docs (#3302) * Change link text to scrypt paper (#3302) * Change link text to scrypt paper, part deux (#3302) * Add "logins" to spelling wordlist
* New osrandom_engine in C (#3229)Christian Heimes2016-12-091-0/+21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 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>
* OpenSSL DH backend implementation [Second attempt] (#2914)Aviv Palivoda2016-11-262-45/+126
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 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
* update docs and changelog for prehashed support (#3268)Paul Kehrer2016-11-201-3/+15
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* add support for prehashing in ECDSA sign/verify (#3267)Paul Kehrer2016-11-201-1/+5
| | | | | | * add support for prehashing in ECDSA sign/verify * move signature_algorithm check to its own function
* support prehashed sign/verify in DSA (#3266)Paul Kehrer2016-11-201-2/+12
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* support RSA verify with prehashing (#3265)Paul Kehrer2016-11-202-2/+19
| | | | | | | | | | * support RSA verify with prehashing * review feedback * more dedupe * refactor and move to a separate module
* support prehashing in RSA sign (#3238)Paul Kehrer2016-11-202-1/+40
| | | | | | | | * support prehashing in RSA sign * check to make sure digest size matches prehashed data provided * move doctest for prehashed
* change derive_elliptic_curve_public_point to return EllipticCurvePubl… (#3243)Paul Kehrer2016-11-182-5/+7
| | | | | | | | | | | | | | * change derive_elliptic_curve_public_point to return EllipticCurvePublicKey * also rename the backend interface method * review feedback * Rename to derive_elliptic_curve_private_key * Returns EllipticCurvePrivateKey * Reuses the EC_POINT in the openssl impl * Rename "secret" arg to "private_value" which is consistent with our naming for the value in ECPrivateNumbers.
* Raise padding block_size limit to what is allowed by the specs. (#3108)Terry Chia2016-11-151-2/+2
| | | | | | | | | | | | | | | | | | | | * Raize padding block_size limit to what is allowed by the specs. * Add tests for raising padding limits. * Amend C code for padding check to use uint16_t instead of uint8_t. * Fix test to work in Python 3. * Fix typo. * Fix another typo. * Fix return type of the padding checks. * Change hypothesis test on padding. * Update comment.
* Add a bytes method to get the DER ASN.1 encoding of an X509 name. (#3236)Paul Kehrer2016-11-131-0/+8
| | | | | | | | | | * Add a bytes method to get the DER ASN.1 encoding of an X509 name. This is useful for creating an OpenSSL style subject_name_hash (#3011) * add to backend interface and update multibackend * bytes -> public_bytes
* add ec.private_key_from_secret_and_curve (#3225)Ofek Lev2016-11-112-0/+25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * finish https://github.com/pyca/cryptography/pull/1973 * change API & add test Function will now return an instance of EllipticCurvePrivateKey, as that is the users' ultimate goal anyway. * fix test * improve coverage * complete coverage * final fix * centos fix * retry * cleanup asserts * use openssl_assert * skip unsupported platforms * change API name to derive_private_key * change version added * improve description of `secret` param * separate successful and failure test cases * simplify successful case * add docs for derive_elliptic_curve_public_point * add period
* Last pass over fixing the links (#3224)Alex Gaynor2016-11-062-2/+2
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* Update the commoncrypto links (#3223)Alex Gaynor2016-11-062-2/+2
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* Link to our implementation of scrypt, now that we have it (#3189)Alex Gaynor2016-10-071-2/+2
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* EC samples for verifying a singature, + serialization (#3076)Alex Railean2016-09-251-0/+79
| | | | | | | | | | | | | | | | | | | | | | | | * first draft of verification and serialization * tweaks in the RST syntax * added example of deserialization * taking into account the returned value, so that doctests pass * adjusted rst syntax and indentation for code samples * removed print call * forgot to actually call splitlines * added missing argument when loading private key * added Deserialization to dictionary * made lines shorter to meet style requirements * applied requested changes in style
* Fix typo in `symmetric-encryption.rst` (#3138)Alex Chan2016-09-041-1/+1
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* Add bounds checking for Scrypt parameters. (#3130)Terry Chia2016-09-021-0/+3
| | | | | | | | | | * Add bounds checking for Scrypt parameters. * Pep8. * More PEP8. * Change wording.
* Scrypt Implementation (#3117)Terry Chia2016-09-013-0/+142
| | | | | | | | | | | | | | | | | | | | | | | | * Scrypt implementation. * Docs stuff. * Make example just an example and not a doctest. * Add changelog entry. * Docs cleanup. * Add more tests. * Add multibackend tests. * PEP8. * Add docs about Scrypt parameters. * Docs cleanup. * Add AlreadyFinalized.
* some docs cleanups + changelog (#3122)Alex Gaynor2016-08-301-3/+2
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* Mention that blake2 is not vulnerable to length-extension attacks (#3118)Alex Gaynor2016-08-291-1/+4
| | | | | | | | * Mention that blake2 is not vulnerable to length-extension attacks * SHA is sort of like a word, in the sense that I want the spellcheck to shut up about it * rephrase
* blake2b/blake2s support (#3116)Paul Kehrer2016-08-281-0/+31
| | | | | | | | | | | | | | | | | | | | | | | | | * blake2b/blake2s support Doesn't support keying, personalization, salting, or tree hashes so the API is pretty simple right now. * implement digest_size via utils.read_only_property * un-keyed for spelling's sake * test copying + digest_size checks * unkeyed is too a word * line wrap * reword the docs * use the evp algorithm name in the error This will make BLAKE2 alternate digest size errors a bit less confusing * add changelog entry and docs about supported digest_size
* Fix docs to clarify the less than 256 limit for Padding(). (#3099)Terry Chia2016-08-241-2/+2
| | | | | | * Fix docs to clarify the less than 256 limit. * Add "inclusive".
* Update example code to use recommended 160 bits (#3088)Dave Brondsema2016-08-161-2/+2
| | | I found the examples with `os.urandom(16)` generated URIs that Google Authenticator and Duo two-factor apps did not even recognize as supported. This increases the key to the recommended 160 bits, and the URIs now work with both of those apps.
* Remove provider language from docs (#3072)Gabriel Orisaka2016-07-318-68/+54
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* Clarify what to pass to the sign-function (#3066)Loy2016-07-301-1/+1
| | | Sign needs an ECDSA instance and from following the link to EllipticCurveSignatureAlgorithm, that wasn't clear directly.
* Removed provider language from asymmetric primitives docs (#3052)Gabriel Orisaka2016-07-265-132/+91
| | | | | | * Removed provider language from asymmetric primitives docs * Reverted changes to some examples
* Enforce that p > q to improve OpenSSL compatibility (fixes #2990) (#3010)Dirkjan Ochtman2016-07-191-1/+3
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* Removed provider language from backend interfaces (#3047)Gabriel Orisaka2016-07-181-110/+81
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* A few small cleanups (#3046)Alex Gaynor2016-07-181-2/+2
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* Add flag to toggle key length check for HOTP and TOTP. (#3012)Terry Chia2016-07-161-2/+22
| | | | | | | | | | * Add an enforce_key_length parameter to HOTP and TOTP. * Document changes in docs. * Add some words to the wordlist. * Add versionadded to docs.
* One shot sign/verification ECDSA (#3029)Aviv Palivoda2016-07-022-5/+46
| | | | | | | | | | | | | | * Add sign and verify methods to ECDSA * Documented ECDSA sign/verify methods * Added CHANGELOG entry * Skipping test verify and sign if curve is not supported * Fixed typo in documentation return type * Removed provider language from EllipticCurvePrivateKey and EllipticCurvePublicKey
* one shot verify documentation fix (#3031)Aviv Palivoda2016-06-302-4/+4
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* One shot sign/verify DSA (#3003)Aviv Palivoda2016-06-301-0/+53
| | | | | | | | * Add sign and verify methods to DSA * Documented DSA sign/verify methods * Added CHANGELOG entry
* Fixed #3008 -- expose calculate max pss salt length (#3014)Alex Gaynor2016-06-271-4/+17
| | | | | | | | | | | | | | * Fixed #3008 -- expose calculate max pss salt length * Fixed a few mistakes in the docs * move all the code around * oops * write a unit test * versionadded + changelog
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