微信小程序 wx.getUserInfo 解密 C# 代码 - 转

public static string DecodeUserInfo(string raw, string signature,string encryptedData, string iv)
{

byte[] iv2 = Convert.FromBase64String(iv);

if (string.IsNullOrEmpty(encryptedData)) return "";
Byte[] toEncryptArray = Convert.FromBase64String(encryptedData);

System.Security.Cryptography.RijndaelManaged rm = new System.Security.Cryptography.RijndaelManaged
{
Key = Convert.FromBase64String(session_key),
IV = iv2,
Mode = System.Security.Cryptography.CipherMode.CBC,
Padding = System.Security.Cryptography.PaddingMode.PKCS7
};

System.Security.Cryptography.ICryptoTransform cTransform = rm.CreateDecryptor();
Byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);

return Encoding.UTF8.GetString(resultArray);

}