使用AesManaged ECB或CBC进行加密/解密无法使用.bin文件

Question

我找到了这段代码并在VS 2017 C#中使用它来加密和解密文件.如果我加密.txt文件,然后解密文件并将解密的输出与原始文件进行比较,则匹配.如果我尝试使用.bin文件,它不匹配,我无法弄清楚原因.我认为它应该适用于任何类型的文件？谁能看出问题是什么？

static void AESEncryptCBC(string plainText, Stream encryptedOutput, byte[] key)
    {
        if (plainText == null || plainText == string.Empty)
            return;

        if (key == null | key.Length == 0)
            return;

        if (encryptedOutput == null)
            return;



        using (var aes = new AesManaged())
        {
            aes.Key = key;


            var salt = new byte[16];

            using (var rngCSP = new RNGCryptoServiceProvider())
            {
                rngCSP.GetBytes(salt);
            }
            aes.IV = salt;


            using (var encryptor = aes.CreateEncryptor())
            {
                encryptedOutput.Write(salt, 0, salt.Length);//write the salt to the begining of the stream


                using (var cs = new CryptoStream(encryptedOutput, encryptor, CryptoStreamMode.Write))
                {
                    using (var writer = new StreamWriter(cs))
                    {
                        writer.Write(plainText);
                    }
                }
            }
        }
    }

    static void AESEncryptECB(string plainText, Stream encryptedOutput, byte[] key)
    {
        if (plainText == null || plainText == string.Empty)
            return;

        if (key == null | key.Length == 0)
            return;

        if (encryptedOutput == null)
            return;



        using (var aes = new AesManaged())
        {
            aes.Key = key;
            aes.Mode = CipherMode.ECB;

            var salt = new byte[16];

            using (var rngCSP = new RNGCryptoServiceProvider())
            {
                rngCSP.GetBytes(salt);
            }
            aes.IV = salt;


            using (var encryptor = aes.CreateEncryptor())
            {
                encryptedOutput.Write(salt, 0, salt.Length); //write the salt to the begining of the stream

                using (var cs = new CryptoStream(encryptedOutput, encryptor, CryptoStreamMode.Write))
                {
                    using (var writer = new StreamWriter(cs))
                    {
                        writer.Write(plainText);
                    }
                }
            }
        }
    }


    static string AESDecryptECB(Stream encryptedInput, byte[] key)
    {
        if (encryptedInput == null || encryptedInput.Length == 0)
            return null;

        if (key == null || key.Length == 0)
            return null;



        var salt = new byte[16];
        encryptedInput.Read(salt, 0, salt.Length);


        using (var aes = new AesManaged())
        {
            aes.Key = key;
            aes.IV = salt;
            aes.Mode = CipherMode.ECB;


            using (var decryptor = aes.CreateDecryptor())
            {
                using (var cs = new CryptoStream(encryptedInput, decryptor, CryptoStreamMode.Read))
                {
                    using (var reader = new StreamReader(cs))
                    {
                        return reader.ReadToEnd();
                    }
                }
            }
        }
    }

    static string AESDecryptCBC(Stream encryptedInput, byte[] key)
    {
        if (encryptedInput == null || encryptedInput.Length == 0)
            return null;

        if (key == null || key.Length == 0)
            return null;



        var salt = new byte[16];
        encryptedInput.Read(salt, 0, salt.Length);


        using (var aes = new AesManaged())
        {
            aes.Key = key;
            aes.IV = salt;


            using (var decryptor = aes.CreateDecryptor())
            {
                using (var cs = new CryptoStream(encryptedInput, decryptor, CryptoStreamMode.Read))
                {
                    using (var reader = new StreamReader(cs))
                    {
                        return reader.ReadToEnd();
                    }
                }
            }
        }
    }

Answer 1

简而言之,您的问题是由于您无法将任意二进制数据表示为字符串.

该StreamWriter和StreamReader文字类工作.二进制数据不是文本.没有字符编码的概念.你应该byte[]在这个级别上工作,而不是字符串!尝试StreamWriter/Reader从代码中消除.