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文章目錄

• 前言
• 一、函數加密？
• 二、使用步驟
• • 1.引入庫
  • 2.函數

前言

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一、函數加密？

示例：

二、使用步驟

1.引入庫

代碼如下（示例）：

pip install cryptography

2.函數

代碼如下（示例）：

import base64
from cryptography.fernet import Fernet
import argon2
class XDEncrypt():
def __init__(self):
pass
def encrypt(self, password, in_file, out_file):
argon2_parameters = argon2.Parameters(type=argon2.low_level.Type.ID, version=19, salt_len=16, hash_len=32, time_cost=16,
memory_cost=2 ** 20, parallelism=8)
hasher = argon2.PasswordHasher(time_cost=argon2_parameters.time_cost, memory_cost=argon2_parameters.memory_cost,
parallelism=argon2_parameters.parallelism, hash_len=argon2_parameters.hash_len,
salt_len=argon2_parameters.salt_len)
pw_hash = hasher.hash(password)
salt = pw_hash.split("$")[-2]
raw_hash = argon2.low_level.hash_secret_raw(time_cost=argon2_parameters.time_cost,
memory_cost=argon2_parameters.memory_cost,
parallelism=argon2_parameters.parallelism,
hash_len=argon2_parameters.hash_len,
secret=bytes(password, "utf_16_le"), salt=bytes(salt, "utf_16_le"),
type=argon2_parameters.type)
key = base64.urlsafe_b64encode(raw_hash)
fernet = Fernet(key)
with open(in_file, 'rb') as f_in,open(out_file, 'wb+') as f_out:
data = f_in.read()
enc_data = fernet.encrypt(data)
pw_hash = pw_hash + '\n'
f_out.write(bytes(pw_hash, "utf-8"))
f_out.write(enc_data)
print('加密完成')
def decrypt(self, password, in_file):
with open(in_file, 'r') as f:
pw_hash = f.readline()[:-1]
p = argon2.extract_parameters(pw_hash)
hasher = argon2.PasswordHasher(time_cost=p.time_cost,
memory_cost=p.memory_cost,
parallelism=p.parallelism,
hash_len=p.hash_len,
salt_len=p.salt_len)
try:
hasher.verify(pw_hash, password)
print("密碼校驗成功")
except:
print("密碼校驗失敗")
exit()
salt = pw_hash.split("$")[-2]
raw_hash = argon2.low_level.hash_secret_raw(time_cost=p.time_cost,
memory_cost=p.memory_cost,
parallelism=p.parallelism,
hash_len=p.hash_len,
secret=bytes(password, "utf_16_le"),
salt=bytes(salt, "utf_16_le"),
type=p.type)
key = base64.urlsafe_b64encode(raw_hash)
fernet = Fernet(key)
dec_data = b''
with open(in_file, 'rb') as f_in:
enc_data = f_in.readlines()[1]
try:
dec_data = fernet.decrypt(enc_data)
print("decryption succeed")
except:
print("decryption failed")
return dec_data
if __name__ == '__main__':
xde = XDEncrypt()
# xde.encrypt(password='123456', in_file=r'D:\xunlian\utils\doc\df.py', out_file=r'D:\xunlian\utils\doc\df_b.py')
res = xde.decrypt(password='123456', in_file=r'D:\xunlian\utils\doc\df_b.py')
print(res)
pass
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