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Set the Python file maximum line length to 88 characters (#2122)

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* flake8 --max-line-length=88

* fixup! Format Python code with psf/black push

Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>
This commit is contained in:
Christian Clauss
2020-06-16 10:09:19 +02:00
committed by GitHub
parent 9438c6bf0b
commit 9316e7c014
90 changed files with 473 additions and 320 deletions
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25
hashes/sha1.py
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@ -3,7 +3,8 @@ Demonstrates implementation of SHA1 Hash function in a Python class and gives ut
to find hash of string or hash of text from a file.
Usage: python sha1.py --string "Hello World!!"
python sha1.py --file "hello_world.txt"
When run without any arguments, it prints the hash of the string "Hello World!! Welcome to Cryptography"
When run without any arguments, it prints the hash of the string "Hello World!!
Welcome to Cryptography"
Also contains a Test class to verify that the generated Hash is same as that
returned by the hashlib library
@ -39,7 +40,8 @@ class SHA1Hash:
def __init__(self, data):
"""
Inititates the variables data and h. h is a list of 5 8-digit Hexadecimal
numbers corresponding to (1732584193, 4023233417, 2562383102, 271733878, 3285377520)
numbers corresponding to
(1732584193, 4023233417, 2562383102, 271733878, 3285377520)
respectively. We will start with this as a message digest. 0x is how you write
Hexadecimal numbers in Python
"""
@ -74,8 +76,8 @@ class SHA1Hash:
# @staticmethod
def expand_block(self, block):
"""
Takes a bytestring-block of length 64, unpacks it to a list of integers and returns a
list of 80 integers after some bit operations
Takes a bytestring-block of length 64, unpacks it to a list of integers and
returns a list of 80 integers after some bit operations
"""
w = list(struct.unpack(">16L", block)) + [0] * 64
for i in range(16, 80):
@ -84,12 +86,13 @@ class SHA1Hash:
def final_hash(self):
"""
Calls all the other methods to process the input. Pads the data, then splits into
blocks and then does a series of operations for each block (including expansion).
Calls all the other methods to process the input. Pads the data, then splits
into blocks and then does a series of operations for each block (including
expansion).
For each block, the variable h that was initialized is copied to a,b,c,d,e
and these 5 variables a,b,c,d,e undergo several changes. After all the blocks are
processed, these 5 variables are pairwise added to h ie a to h[0], b to h[1] and so on.
This h becomes our final hash which is returned.
and these 5 variables a,b,c,d,e undergo several changes. After all the blocks
are processed, these 5 variables are pairwise added to h ie a to h[0], b to h[1]
and so on. This h becomes our final hash which is returned.
"""
self.padded_data = self.padding()
self.blocks = self.split_blocks()
@ -138,8 +141,8 @@ class SHA1HashTest(unittest.TestCase):
def main():
"""
Provides option 'string' or 'file' to take input and prints the calculated SHA1 hash.
unittest.main() has been commented because we probably don't want to run
Provides option 'string' or 'file' to take input and prints the calculated SHA1
hash. unittest.main() has been commented because we probably don't want to run
the test each time.
"""
# unittest.main()