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Merge pull request #1014 from bigchaindb/884/sha3-2015

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update pysha3 to 1.0b1, sha3 NIST 2015 standard
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libscott 2017-01-05 11:58:49 +01:00 committed by GitHub
commit 3d74bfbb89
2 changed files with 9 additions and 5 deletions
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12
docs/server/source/appendices/cryptography.md
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@ -9,14 +9,15 @@ as described in [the section on JSON serialization](json-serialization.html).
## Hashes ## Hashes
BigchainDB computes transaction and block hashes using an implementation of the BigchainDB computes transaction and block hashes using an implementation of the
[SHA3-256](https://en.wikipedia.org/wiki/SHA-3) [SHA3-256](https://pypi.python.org/pypi/pysha3)
algorithm provided by the algorithm provided by the
[**pysha3** package](https://bitbucket.org/tiran/pykeccak), [**pysha3** package](https://bitbucket.org/tiran/pykeccak),
which is a wrapper around the optimized reference implementation which is a wrapper around the optimized reference implementation
from [http://keccak.noekeon.org](http://keccak.noekeon.org). from [http://keccak.noekeon.org](http://keccak.noekeon.org).
Here's the relevant code from `bigchaindb/bigchaindb/common/crypto.py` **Important**: Since selecting the Keccak hashing algorithm for SHA-3 in 2012, NIST [released a new version](https://en.wikipedia.org/wiki/SHA-3#cite_note-14) of the hash using the same algorithm but slightly different parameters. As of version 0.9, BigchainDB is using the latest version, supported by pysha3 1.0b1. See below for an example output of the hash function.
(as of 11 December 2016):
Here's the relevant code from `bigchaindb/bigchaindb/common/crypto.py:
```python ```python
import sha3 import sha3
@ -37,7 +38,10 @@ For example:
>>> import sha3 >>> import sha3
>>> data = '字' >>> data = '字'
>>> sha3.sha3_256(data.encode()).hexdigest() >>> sha3.sha3_256(data.encode()).hexdigest()
'c67820de36d949a35ca24492e15767e2972b22f77213f6704ac0adec123c5690' '2b38731ba4ef72d4034bef49e87c381d1fbe75435163b391dd33249331f91fe7'
>>> data = 'hello world'
>>> sha3.sha3_256(data.encode()).hexdigest()
'644bcc7e564373040999aac89e7622f3ca71fba1d972fd94a31c3bfbf24e3938'
``` ```
Note: Hashlocks (which are one kind of crypto-condition) Note: Hashlocks (which are one kind of crypto-condition)

2
setup.py
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@ -61,7 +61,7 @@ install_requires = [
# TODO Consider not installing the db drivers, or putting them in extras. # TODO Consider not installing the db drivers, or putting them in extras.
'rethinkdb~=2.3', # i.e. a version between 2.3 and 3.0 'rethinkdb~=2.3', # i.e. a version between 2.3 and 3.0
'pymongo~=3.4', 'pymongo~=3.4',
'pysha3>=0.3', 'pysha3==1.0.0',
'cryptoconditions>=0.5.0', 'cryptoconditions>=0.5.0',
'statsd>=3.2.1', 'statsd>=3.2.1',
'python-rapidjson>=0.0.8', 'python-rapidjson>=0.0.8',