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前往新版Gitcode,体验更适合开发者的 AI 搜索 >>
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7f3895cd
编写于
9月 23, 2018
作者:
P
piyush-kgp
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电子邮件补丁
差异文件
moved constants inside the class
上级
4d255f4e
变更
1
隐藏空白更改
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并排
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1 changed file
with
17 addition
and
10 deletion
+17
-10
hashes/sha1.py
hashes/sha1.py
+17
-10
未找到文件。
hashes/sha1.py
浏览文件 @
7f3895cd
...
...
@@ -6,7 +6,6 @@ Usage: python sha1.py --string "Hello World Welcome to Cryptography"
Without any arguments prints the hash of the string "Hello World"
Also contains a Test class to verify that the generated Hash is same as that
returned by the hashlib library
Reference: https://deadhacker.com/2006/02/21/sha-1-illustrated/
The Algorithm as described in the reference:
First we start with a message. The message is padded and the length of the message
...
...
@@ -15,15 +14,25 @@ processed one at a time. Each block must be expanded and compressed.
The value after each compression is added to a 160bit buffer called the current hash
state. After the last block is processed the current hash state is returned as
the final hash.
Reference: https://deadhacker.com/2006/02/21/sha-1-illustrated/
"""
import
argparse
import
hashlib
#hashlib is only used inside the Test class
class
SHA1
:
class
SHA1Hash
:
"""
Class to contain the entire pipeline for SHA1 Hashing Algorithm
"""
H0
-
01100111010001010010001100000001
H1
-
11101111110011011010101110001001
H2
-
10011000101110101101110011111110
H3
-
00010000001100100101010001110110
H4
-
11000011110100101110000111110000
def
__init__
(
self
,
data
):
self
.
data
=
data
self
.
current_hash
=
''
...
...
@@ -41,11 +50,9 @@ class SHA1:
return
def
final_hash
(
self
):
assert
True
#everything done till now
# return self.current_hash
return
hashlib
.
sha1
(
bytes
(
self
.
data
,
'utf-8'
)).
hexdigest
()
return
'This is in my To Do list'
class
SHA1Test
:
class
SHA1
Hash
Test
:
"""
Test class for the SHA1 class
"""
...
...
@@ -53,7 +60,7 @@ class SHA1Test:
self
.
data
=
data
def
calculated_hash
(
self
):
return
SHA1
(
self
.
data
).
final_hash
()
return
SHA1
Hash
(
self
.
data
).
final_hash
()
def
hashlib_hash
(
self
):
return
hashlib
.
sha1
(
self
.
data
.
byte_encode
()).
hexdigest
()
...
...
@@ -67,10 +74,10 @@ class SHA1Test:
def
run_test_case
(
hash_input
=
'Hello World'
):
"""
Pulled this out of main because we probably dont want to run the
Unit
Test
Pulled this out of main because we probably dont want to run the Test
each time we want to calculate hash.
"""
print
(
SHA1Test
(
hash_input
).
match_hashes
())
print
(
SHA1
Hash
Test
(
hash_input
).
match_hashes
())
def
main
():
...
...
@@ -84,7 +91,7 @@ def main():
hash_input
=
open
(
args
.
input_file
,
'r'
).
read
()
else
:
hash_input
=
input_string
print
(
SHA1
(
hash_input
).
final_hash
())
print
(
SHA1
Hash
(
hash_input
).
final_hash
())
if
__name__
==
'__main__'
:
main
()
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