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To encrypt an attachment and automatically generate a password for it in Python, you can use the cryptography library with Fernet symmetric encryption. This ensures strong AES-based encryption and easy key handling.
Steps to Implement
1. Install Required Library
pip install cryptographyコピーしました。✕コピー2. Generate Password and Encrypt File
We’ll generate a secure random password, derive an encryption key from it, and encrypt the file.
import secretsimport base64from cryptography.fernet import Fernetdef generate_password(length=16):# Generates a secure random passwordreturn secrets.token_urlsafe(length)def password_to_key(password):# Convert password to Fernet-compatible key (32 bytes, Base64 encoded)return base64.urlsafe_b64encode(password.encode().ljust(32, b'0'))def encrypt_file(filename, key):fernet = Fernet(key)with open(filename, 'rb') as file:original = file.read()encrypted = fernet.encrypt(original)with open(filename, 'wb') as encrypted_file:encrypted_file.write(encrypted)# Example usagepassword = generate_password()key = password_to_key(password)encrypt_file("attachment.pdf", key)print(f"Generated Password: {password}")コピーしました。✕コピー Encrypt and Decrypt Files using Python - GeeksforGeeks
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