加密和解密图像.net

Question

任何人都可以给我一个使用.net和asp.net加密和解密图像的例子

当我将它作为二进制数据保存到sql server中时,我希望对图像进行加密.

Answer 1

包括这些名称空间

using System.IO;
using System.Security.Cryptography;

对于加密创建以下功能:

private void EncryptFile(string inputFile, string outputFile)
{

    try
    {
        string password = @"myKey123"; // Your Key Here
        UnicodeEncoding UE = new UnicodeEncoding();
        byte[] key = UE.GetBytes(password);

        string cryptFile = outputFile;
        FileStream fsCrypt = new FileStream(cryptFile, FileMode.Create);

        RijndaelManaged RMCrypto = new RijndaelManaged();

        CryptoStream cs = new CryptoStream(fsCrypt,
            RMCrypto.CreateEncryptor(key, key),
            CryptoStreamMode.Write);

        FileStream fsIn = new FileStream(inputFile, FileMode.Open);

        int data;
        while ((data = fsIn.ReadByte()) != -1)
            cs.WriteByte((byte)data);


        fsIn.Close();
        cs.Close();
        fsCrypt.Close();
    }
    catch
    {
        MessageBox.Show("Encryption failed!", "Error");
    }
}

对于解密创建以下功能:

private void DecryptFile(string inputFile, string outputFile)
{

    {
        string password = @"myKey123"; // Your Key Here

        UnicodeEncoding UE = new UnicodeEncoding();
        byte[] key = UE.GetBytes(password);

        FileStream fsCrypt = new FileStream(inputFile, FileMode.Open);

        RijndaelManaged RMCrypto = new RijndaelManaged();

        CryptoStream cs = new CryptoStream(fsCrypt,
            RMCrypto.CreateDecryptor(key, key),
            CryptoStreamMode.Read);

        FileStream fsOut = new FileStream(outputFile, FileMode.Create);

        int data;
        while ((data = cs.ReadByte()) != -1)
            fsOut.WriteByte((byte)data);

        fsOut.Close();
        cs.Close();
        fsCrypt.Close();

    }
}

你可以这样打电话

   EncryptFile(@"D:\OriginalImage.png", @"D:\VizioEncrypted.png"); //To Encrypt

   DecryptFile(@"D:\VizioEncrypted.png", @"D:\VizioDecrypted.png"); //To Decrypt

这会有所帮助