/// <summary>
/// 使用 HMAC-MD5 演算法進行資料加密。
/// </summary>
/// <param name="s">原字串。</param>
/// <param name="key">加密鍵值。</param>
public static string HMACMD5Encrypt(string s, string key)
{
ASCIIEncoding oEncoding;
byte[] oKeyByte;
byte[] oMessageBytes;
HMACMD5 oMD5;
oEncoding = new ASCIIEncoding();
oKeyByte = oEncoding.GetBytes(key);
oMessageBytes = oEncoding.GetBytes(s);
oMD5 = new HMACMD5(oKeyByte);
return(BaseFunc.ByteToHex(oMD5.ComputeHash(oMessageBytes)));
}