SimpleCrypt Python错误

Question

我使用simplecrypt library加密文件，但我似乎无法以simplecrypt可以解码文件的方式阅读文件。

加密代码：

from simplecrypt import encrypt, decrypt
def encrypt_file(file_name, key):
    with open(file_name, 'rb') as fo:
        plaintext = fo.read()
    enc = encrypt(plaintext, key)
    with open(file_name + ".enc", 'wb') as fo:
        fo.write(enc)

encrypt_file("test.txt", "securepass")

这样可以正常运行并且没有任何错误，但是一旦我尝试解码它我就会收到此错误（使用下面的代码）

simplecrypt.DecryptionException: Data to decrypt must be bytes; you cannot use a string because no string encoding will accept all possible characters.

from simplecrypt import encrypt, decrypt
def decrypt_file(file_name, key):
    with open(file_name, 'rb') as fo:
        ciphertext = fo.read()
    dec = decrypt(ciphertext, key)
    with open(file_name[:-4], 'wb') as fo:
        fo.write(dec)
decrypt_file("test.txt.enc", "securepass")

Answer 1

啊哈...轻微错误： - ）

根据您在问题中提供的the link中的文档，symplecrypt.encrypt和simplecrypt.decrypt的论据是('password', text)。在您的代码中，您已经倒置了（(text, key)）。您在第一个参数中传递文本以加密/解密，在第二个参数中传递密钥。只需颠倒该顺序即可。

工作示例：

from simplecrypt import encrypt, decrypt
def encrypt_file(file_name, key):
    with open(file_name, 'rb') as fo:
        plaintext = fo.read()
    print "Text to encrypt: %s" % plaintext
    enc = encrypt(key, plaintext)
    with open(file_name + ".enc", 'wb') as fo:
        fo.write(enc)

def decrypt_file(file_name, key):
    with open(file_name, 'rb') as fo:
        ciphertext = fo.read()
    dec = decrypt(key, ciphertext)
    print "decrypted text: %s" % dec
    with open(file_name[:-4], 'wb') as fo:
        fo.write(dec)

if __name__ == "__main__":
    encrypt_file("test.txt", "securepass")
    decrypt_file("test.txt.enc", "securepass")