加密和解密圖片.NET

Question

誰能給我一個加密例如和解密使用.NET的圖像與asp.net

我想這個加密圖像當我把它保存到SQL Server作爲二進制數據。

Answer 1

最後我找到了這個問題的解決方案。 我將添加幫助需要的代碼。

加密方法：

Public Function EncryptStream(ByVal input As Byte()) As Byte() 
    Dim rijn As New RijndaelManaged() 
    Dim encrypted As Byte() 
    Dim key As Byte() = New Byte() {&H22, &HC0, &H6D, &HCB, &H23, &HA6, _ 
    &H3, &H1B, &H5A, &H1D, &HD3, &H9F, _ 
    &H85, &HD, &HC1, &H72, &HED, &HF4, _ 
    &H54, &HE6, &HBA, &H65, &HC, &H22, _ 
    &H62, &HBE, &HF3, &HEC, &H14, &H81, _ 
    &HA8, &HA} 
    '32 
    Dim IV As Byte() = New Byte() {&H43, &HB1, &H93, &HB, &H1A, &H87, _ 
    &H52, &H62, &HFB, &H8, &HD, &HC0, _ 
    &HCA, &H40, &HC2, &HDB} 
    '16 
    'Get an encryptor. 
    Dim encryptor As ICryptoTransform = rijn.CreateEncryptor(key, IV) 

    'Encrypt the data. 
    Dim msEncrypt As New MemoryStream() 
    Dim csEncrypt As New CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write) 


    'Write all data to the crypto stream and flush it. 
    csEncrypt.Write(input, 0, input.Length) 
    csEncrypt.FlushFinalBlock() 

    'Get encrypted array of bytes. 
    encrypted = msEncrypt.ToArray() 

    Return encrypted 

End Function 

解密方法：

Public Function DecryptStream(ByVal input As Byte()) As Byte() 
    Dim rijn As New RijndaelManaged() 
    Dim decrypted As Byte() 
    Dim key As Byte() = New Byte() {&H22, &HC0, &H6D, &HCB, &H23, &HA6, _ 
    &H3, &H1B, &H5A, &H1D, &HD3, &H9F, _ 
    &H85, &HD, &HC1, &H72, &HED, &HF4, _ 
    &H54, &HE6, &HBA, &H65, &HC, &H22, _ 
    &H62, &HBE, &HF3, &HEC, &H14, &H81, _ 
    &HA8, &HA} 
    '32 
    Dim IV As Byte() = New Byte() {&H43, &HB1, &H93, &HB, &H1A, &H87, _ 
    &H52, &H62, &HFB, &H8, &HD, &HC0, _ 
    &HCA, &H40, &HC2, &HDB} 
    '16 


    'Get a decryptor that uses the same key and IV as the encryptor. 
    Dim decryptor As ICryptoTransform = rijn.CreateDecryptor(key, IV) 

    'Now decrypt the previously encrypted message using the decryptor 
    ' obtained in the above step. 
    Dim msDecrypt As New MemoryStream(input) 
    Dim csDecrypt As New CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read) 

    decrypted = New Byte(input.Length - 1) {} 

    'Read the data out of the crypto stream. 
    csDecrypt.Read(decrypted, 0, decrypted.Length) 

    Return decrypted 
End Function 

Answer 2

包含這些命名空間

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

加密創建以下功能：

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"); 
    } 
} 

解密創建以下功能：

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(); 

    } 
} 

你可以這樣調用

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

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

這將有助於