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Implementation of SHA-256 using Python #5532

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merged 11 commits into from Oct 23, 2021
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@Studiex Studiex commented Oct 22, 2021

Describe your change:

Implementation of SHA-256 using pure Python. Have used the Black Formatter.

References
https://qvault.io/cryptography/how-sha-2-works-step-by-step-sha-256/ (in detail)
https://en.wikipedia.org/wiki/SHA-2 (Pseudocode)

  • Add an algorithm?
  • Fix a bug or typo in an existing algorithm?
  • Documentation change?

Checklist:

  • I have read CONTRIBUTING.md.
  • This pull request is all my own work -- I have not plagiarized.
  • I know that pull requests will not be merged if they fail the automated tests.
  • This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms.
  • All new Python files are placed inside an existing directory.
  • All filenames are in all lowercase characters with no spaces or dashes.
  • All functions and variable names follow Python naming conventions.
  • All function parameters and return values are annotated with Python type hints.
  • All functions have doctests that pass the automated testing.
  • All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation.
  • If this pull request resolves one or more open issues then the commit message contains Fixes: #{$ISSUE_NO}.
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Test class for the SHA256 class. Inherits the TestCase class from unittest
"""

def test_match_hashes(self) -> None:

As there is no test file in this pull request nor any test function or class in the file hashes/sha256.py, please provide doctest for the function test_match_hashes

self.assertEqual(SHA256(msg).hash, hashlib.sha256(msg).hexdigest())


def main() -> None:

As there is no test file in this pull request nor any test function or class in the file hashes/sha256.py, please provide doctest for the function main

@Studiex Studiex requested a review from cclauss Oct 23, 2021
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Test class for the SHA256 class. Inherits the TestCase class from unittest
"""

def test_match_hashes(self) -> None:

As there is no test file in this pull request nor any test function or class in the file hashes/sha256.py, please provide doctest for the function test_match_hashes

self.assertEqual(SHA256(msg).hash, hashlib.sha256(msg).hexdigest())


def main() -> None:

As there is no test file in this pull request nor any test function or class in the file hashes/sha256.py, please provide doctest for the function main

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Test class for the SHA256 class. Inherits the TestCase class from unittest
"""

def test_match_hashes(self) -> None:

As there is no test file in this pull request nor any test function or class in the file hashes/sha256.py, please provide doctest for the function test_match_hashes

self.assertEqual(SHA256(msg).hash, hashlib.sha256(msg).hexdigest())


def main() -> None:

As there is no test file in this pull request nor any test function or class in the file hashes/sha256.py, please provide doctest for the function main

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Test class for the SHA256 class. Inherits the TestCase class from unittest
"""

def test_match_hashes(self) -> None:

As there is no test file in this pull request nor any test function or class in the file hashes/sha256.py, please provide doctest for the function test_match_hashes

self.assertEqual(SHA256(msg).hash, hashlib.sha256(msg).hexdigest())


def main() -> None:

As there is no test file in this pull request nor any test function or class in the file hashes/sha256.py, please provide doctest for the function main

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hashes/sha256.py Outdated
self.final_hash()

@staticmethod
def preprocessing(data) -> bytes:

Please provide type hint for the parameter: data

Test class for the SHA256 class. Inherits the TestCase class from unittest
"""

def test_match_hashes(self) -> None:

As there is no test file in this pull request nor any test function or class in the file hashes/sha256.py, please provide doctest for the function test_match_hashes

self.assertEqual(SHA256(msg).hash, hashlib.sha256(msg).hexdigest())


def main() -> None:

As there is no test file in this pull request nor any test function or class in the file hashes/sha256.py, please provide doctest for the function main

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Test class for the SHA256 class. Inherits the TestCase class from unittest
"""

def test_match_hashes(self) -> None:

As there is no test file in this pull request nor any test function or class in the file hashes/sha256.py, please provide doctest for the function test_match_hashes

self.assertEqual(SHA256(msg).hash, hashlib.sha256(msg).hexdigest())


def main() -> None:

As there is no test file in this pull request nor any test function or class in the file hashes/sha256.py, please provide doctest for the function main

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@cclauss cclauss left a comment

Awesome!

@cclauss cclauss merged commit 218d892 into TheAlgorithms:master Oct 23, 2021
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