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35 lines
1.4 KiB
35 lines
1.4 KiB
def message_encrypt():
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encrypted_lines = ""
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# 读取 DES 密钥
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with open('sandbox_sender/desPassword.txt', 'r') as des_password_gotcha:
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des_pwd = des_password_gotcha.readline().strip() # 移除可能存在的换行符
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# 确保 DES 密钥长度为 8 字节
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if len(des_pwd) != 8:
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raise ValueError("DES 密钥长度必须是 8 字节")
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# 读取原始消息
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with open('sandbox_sender/sample.txt', 'r') as original_file:
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original = original_file.read()
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# 使用 PKCS#7 填充，使文本长度为 DES 块大小的倍数 (8 字节)
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original_length = len(original)
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if original_length % 8 != 0:
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padding_length = 8 - (original_length % 8)
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original = original + chr(padding_length) * padding_length
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# 创建 DES 加密器
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des_cipher = DES.new(des_pwd.encode(), DES.MODE_ECB) # 使用 ECB 模式
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# 加密文本
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encrypted_lines = ""
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for i in range(0, len(original), 8):
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block = original[i:i + 8].encode() # 取每个 8 字节块
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encrypted_block = des_cipher.encrypt(block) # 加密块
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encrypted_lines += encrypted_block.hex() # 将加密结果转换为十六进制字符串
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# 将加密后的消息保存到文件
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with open('outbox/encrypted_msg.txt', 'w') as container_of_encrypted_contents:
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container_of_encrypted_contents.write(encrypted_lines)
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print("Message has been encrypted.") |