Bump ecdsa from 0.13.2 to 0.13.3

[dependabot[bot]]

Bumps ecdsa from 0.13.2 to 0.13.3.

Release notes

Sourced from ecdsa's releases.

ecdsa 0.13.3

Fix CVE-2019-14853 - possible DoS caused by malformed signature decoding Fix CVE-2019-14859 - signature malleability caused by insufficient checks of DER encoding

Also harden key decoding from string and DER encodings.

Changelog

Sourced from ecdsa's changelog.

• Release 0.15 (02 Jan 2020)

Bug fixes: from curves import * will now correctly import BRAINPOOLP256r1 and BRAINPOOLP320r1 curves.

New features: ECDH operations have a public explicit API. Large hashes are now supported with small curves (e.g. SHA-256 can be used with NIST192p). VerifyingKey now supports the precompute() method to further speed up signature verification with the given instance of the key.

New API: VerifyingKey, SigningKey, Public_key, Private_key and CurveFp now have __eq__ methods. ecdsa.ecdh module and ECDH class. PointJacobi added. VerifyingKey.verify_digest, SigningKey.sign_digest and SigningKey.sign_digest_deterministic methods now accept allow_truncate argument to enable use of hashes larger than the curve order. VerifyingKey from_pem and from_der now accept hashfunc parameter like other from* methods. VerifyingKey has precompute method now. VerifyingKey.from_public_point may now not perform validation of public point when validate_point=False argument is passed to method. CurveFp constructor now accepts the h parameter - the cofactor of the elliptic curve, it's used for selection of algorithm of public point verification.

Performance: randrange now will now perform much fewer calls to system random number generator. PointJacobi introduced and used as the underlying implementation; speeds up the library by a factor of about 20. Library has now optional dependencies on gmpy and gmpy2. When they are availbale, the elliptic curve calculations will be about 3 times faster.

Maintenance: expected minimum version of six module (1.9.0) is now specified explicitly in setup.py and tested against. Significantly faster test suite execution.

• Release 0.14.1 (06 Nov 2019)

Remove the obsolete six.py file from wheel

• Release 0.14 (06 Nov 2019)

Bug fixes:

... (truncated)

Commits

• 7add221 update NEWS file for 0.13.3
• 5c4c74a Merge pull request #124 from tomato42/backport-sig-decode
• 1eb2c04 update README with error handling of from_string() and from_der()
• b95be03 execute also new tests in Travis
• 99c907d harden also key decoding
• 3427fa2 ensure that the encoding is actually the minimal one for length and integer
• 563d2ee make variable names in remove_integer more aproppriate
• 14abfe0 explicitly specify the distro to get py26 and py33
• 9080d1d fix length decoding
• 897178c give the same handling to string encoded signatures as to DER
• Additional commits viewable in compare view

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