Microsoft Capicom 2.1 On 64bit OS

第一步下载capicom.dll

 http://files.cnblogs.com/files/chen110xi/DLL.7z

第二步注册capicom.dll至SysWow64

第三步VS中设置

1.添加com，capicom.dll的参考

2.COM 元件需注意是否內嵌 Interop 型別，设置为false(只有.NET 4.0+需要)

3.专案是否设置为x86

第四步开发

http://files.cnblogs.com/files/chen110xi/KeyC.7z

C#

/// <summary>
/// 解密
/// </summary>
/// <param name="EncryptMsg">需要解密的字串</param>
/// <param name="DecryptKey">金鑰</param>
/// <returns></returns>
/// <remarks></remarks>
public static string DoDecryptCommand(string EncryptMsg,string DecryptKey)
{
    string strRetrun = string.Empty;
    // Dim Contents
            CAPICOM.EncryptedData EncryptedData = new CAPICOM.EncryptedData();
   



    //dynamic EncryptedData = null;
    // Create the EncryptedData object.
    //EncryptedData = Interaction.CreateObject("CAPICOM.EncryptedData");
    // Set decryption password.
    EncryptedData.SetSecret(DecryptKey);
    // Load the encrypted message.
    // LoadFile FileName, Message
    // Now decrypt it.
    EncryptedData.Decrypt(EncryptMsg);
    //DoDecryptCommand = EncryptedData.Content
    strRetrun = EncryptedData.Content;
    // Free resources.
    EncryptedData = null;
    return strRetrun;
}
// End DoDecryptCommand
/// <summary>
/// 加密
/// </summary>
/// <param name="Content">要加密的字串</param>
/// <param name="Algorithm">預設3</param>
/// <param name="KeyLength">預設0</param>
/// <param name="Password">金鑰</param>
/// <returns></returns>
/// <remarks></remarks>
public static string DoEncryptCommand(string Content, CAPICOM.CAPICOM_ENCRYPTION_ALGORITHM Algorithm, CAPICOM.CAPICOM_ENCRYPTION_KEY_LENGTH KeyLength, string Password)
{
    string functionReturnValue = "";
    CAPICOM.EncryptedData EncryptedData = new CAPICOM.EncryptedData();
    // Set algorithm, key size, and encryption password.
    EncryptedData.Algorithm.Name = Algorithm;
    EncryptedData.Algorithm.KeyLength = KeyLength;
    EncryptedData.SetSecret(Password);
    // Now encrypt it.
    EncryptedData.Content = Content;
    functionReturnValue = EncryptedData.Encrypt();
    // Free resources.
    EncryptedData = null;
    return functionReturnValue;
}

VB

Imports CAPICOM

Module Decrypt
    'Public Fire_Up, Login_OK, Pass1 As String
    ''' <summary>
    ''' 解密
    ''' </summary>
    ''' <param name="EncryptMsg">密文</param>
    ''' <param name="DecryptKey">密匙</param>
    ''' <returns>明文</returns>
    ''' <remarks></remarks>
    Public Function DoDecryptCommand(ByVal EncryptMsg, ByVal DecryptKey, Optional ByVal Algorithm = 0, Optional ByVal KeyLength = 0)
        'Dim Contents
        'Dim EncryptedData
        '' Create the EncryptedData object.
        'EncryptedData = CreateObject("CAPICOM.EncryptedData")
        '' Set decryption password.


        'EncryptedData.Algorithm.Name = Algorithm
        'EncryptedData.Algorithm.KeyLength = KeyLength

        'EncryptedData.SetSecret(DecryptKey)
        '' Load the encrypted message.
        '' LoadFile FileName, Message
        '' Now decrypt it.
        'EncryptedData.Decrypt(EncryptMsg)  'Nelson Mark
        'Contents = Trim(EncryptedData.Content)       'Nelson Mark
        'Pass1 = Contents
        'EncryptedData = Nothing
        'Return Contents       'Nelson Mark 
        Dim encryptedData As New CAPICOM.EncryptedData
        encryptedData.Algorithm.Name = 0
        encryptedData.Algorithm.KeyLength = 0
        encryptedData.SetSecret(DecryptKey, CAPICOM_SECRET_TYPE.CAPICOM_SECRET_PASSWORD)
        encryptedData.Decrypt(EncryptMsg)
        Return encryptedData.Content

    End Function

    'Const CAPICOM_ENCRYPTION_ALGORITHM_RC2 = 0
    'Const CAPICOM_ENCRYPTION_ALGORITHM_RC4 = 1
    'Const CAPICOM_ENCRYPTION_ALGORITHM_DES = 2
    'Const CAPICOM_ENCRYPTION_ALGORITHM_3DES = 3
    'Const CAPICOM_ENCRYPTION_ALGORITHM_AES = 4

    'Const CAPICOM_ENCRYPTION_KEY_LENGTH_MAXIMUM = 0
    'Const CAPICOM_ENCRYPTION_KEY_LENGTH_40_BITS = 1
    'Const CAPICOM_ENCRYPTION_KEY_LENGTH_56_BITS = 2
    'Const CAPICOM_ENCRYPTION_KEY_LENGTH_128_BITS = 3
    'Const CAPICOM_ENCRYPTION_KEY_LENGTH_192_BITS = 4
    'Const CAPICOM_ENCRYPTION_KEY_LENGTH_256_BITS = 5
    ''' <summary>
    ''' 加密
    ''' </summary>
    ''' <param name="Content">明文</param>
    ''' <param name="DecryptKey">密匙</param>
    ''' <param name="Algorithm">加密類型：0:RSA RC2;1:RSA RC4;2：DES;3:3DES</param>
    ''' <param name="KeyLength">密匙長度：0:CAPICOM_KEY_LENGTH_MAXIMUM;1:CAPICOM_KEY_LENGTH_40_BITS(40-bit);2:56-bit;3:128-bit;5：256；</param>
    ''' <returns>密文</returns>
    ''' <remarks></remarks>
    Function DoEncryptCommand(ByVal Content, ByVal DecryptKey, Optional ByVal Algorithm = 0, Optional ByVal KeyLength = 0)
        'Dim EncryptedData
        '' Create the EncryptedData object.
        'EncryptedData = CreateObject("CAPICOM.EncryptedData")
        '' Set algorithm, key size, and encryption password.
        'EncryptedData.Algorithm.Name = Algorithm
        'EncryptedData.Algorithm.KeyLength = KeyLength

        'EncryptedData.SetSecret(DecryptKey)
        '' Now encrypt it.
        'EncryptedData.Content = Content
        'DoEncryptCommand = EncryptedData.Encrypt
        '' Free resources.
        'EncryptedData = Nothing

        Dim encryptedData = New EncryptedDataClass()
        encryptedData.Content = Content
        encryptedData.Algorithm.Name = 0
        encryptedData.Algorithm.KeyLength = 0
        encryptedData.SetSecret(DecryptKey, CAPICOM_SECRET_TYPE.CAPICOM_SECRET_PASSWORD)
        Return encryptedData.Encrypt(CAPICOM_ENCODING_TYPE.CAPICOM_ENCODE_BASE64)

        'Dim functionReturnValue = ""
        'Dim EncryptedData = New CAPICOM.EncryptedData()
        'EncryptedData.Algorithm.Name = Algorithm
        'EncryptedData.Algorithm.KeyLength = KeyLength
        'EncryptedData.SetSecret(DecryptKey)
        'EncryptedData.Content = Content
        'functionReturnValue = EncryptedData.Encrypt()
        'Return functionReturnValue

    End Function ' End DoEncryptCommand

End Module