[英]how to save output file.txt after hashing sha256 in python
[英]How to save SHA256 object to a file?
(我正在使用 pycryptodome 在 python 3.10.4 中執行所有這些操作)
我正在嘗試執行此過程:
我在第 3 步中遇到問題,在哪里保存 hash,我必須將其保存為字符串,這在第 3 步中不起作用。
我試過使用泡菜,但我得到“不能腌制包含指針的 ctypes 對象”
生成 hash 的代碼:
sha256 = SHA256.new()
with open(fileDir, 'rb') as f:
while True:
data = f.read(BUF_SIZE)
if not data:
break
sha256.update(data)
執行簽名的代碼:
get_file(fileName + '.hash', directory)
with open(currentDir + '/client_files/downloaded/' + fileName + '.hash', 'r') as f:
hash_data = f.read()
with open(currentDir + '/client_files/private_key.pem', 'rb') as f:
private_key = RSA.importKey(f.read())
print(private_key)
signer = PKCS1_v1_5.new(private_key)
signature = signer.sign(hash_data)
我得到的錯誤:
Traceback (most recent call last):
File "c:\Users\User\Documents\Coding\VSCode Projects\practiceGround\sec_cloud_project\client\client.py", line 168, in <module>
main()
File "c:\Users\User\Documents\Coding\VSCode Projects\practiceGround\sec_cloud_project\client\client.py", line 163, in main
sign(fileName, 'worker_test_files')
File "c:\Users\User\Documents\Coding\VSCode Projects\practiceGround\sec_cloud_project\client\client.py", line 120, in sign
signature = signer.sign(hash_data)
File "C:\Users\User\anaconda3\envs\nscc_project\lib\site-packages\Crypto\Signature\pkcs1_15.py", line 77, in sign
em = _EMSA_PKCS1_V1_5_ENCODE(msg_hash, k)
File "C:\Users\User\anaconda3\envs\nscc_project\lib\site-packages\Crypto\Signature\pkcs1_15.py", line 191, in _EMSA_PKCS1_V1_5_ENCODE
digestAlgo = DerSequence([ DerObjectId(msg_hash.oid).encode() ])
AttributeError: 'str' object has no attribute 'oid'
請注意,我目前正在將原始 hash 作為字符串保存到文本文件中。 如果我嘗試使用 pickle 將 object 作為一個整體保存,我會收到此錯誤
with open(currentDir + '/worker_files/sha256.pickle', 'wb') as f:
pickle.dump(sha256, f)
Traceback (most recent call last):
File "c:\Users\User\Documents\Coding\VSCode Projects\practiceGround\sec_cloud_project\worker\worker.py", line 188, in <module>
main()
File "c:\Users\User\Documents\Coding\VSCode Projects\practiceGround\sec_cloud_project\worker\worker.py", line 179, in main
hash_file(fileName, 'worker_test_files')
File "c:\Users\User\Documents\Coding\VSCode Projects\practiceGround\sec_cloud_project\worker\worker.py", line 55, in hash_file
pickle.dump(sha256, f)
ValueError: ctypes objects containing pointers cannot be pickled
感謝@Topaco。 更改為使用Cyptography
進行散列和簽名似乎有效。
使用Cryptography
散列,使用pickle
轉儲到文件,然后再次加載並使用Cryptography
簽名。
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