private static String dateTimeFormat = "yyyy-MM-dd/hh:mm:ss"; // constant
/// <summary>
/// 从加密文本解密出 License 对象。如果解密失败，返回null。
/// </summary>
/// <param name="execPath">license-app的可执行文件路径</param>
/// <param name="key">键，不能超过32个字节，否则返回null</param>
/// <param name="cipher_text">加密文本</param>
public static License decryptFrom(String execPath, byte[] key, byte[] cipher_text)
{
StringBuilder keyStr = convertKeyToString(key);
StringBuilder cipherStr = new StringBuilder("[");
for (int i = 0; i < cipher_text.Length; i++)
{
cipherStr.Append(cipher_text[i]);
cipherStr.Append(',');
}
cipherStr.Remove(cipherStr.Length - 1, 1);
cipherStr.Append(']');
String args = String.Format("dec {0} {1}", keyStr, cipherStr);
int exitCode = 0;
String resultStr = CmdUtils.RunCommand(execPath, args, ref exitCode);
License result = null;
if (exitCode == 0)
{
String[] fields = resultStr.Split(new char[] { '\n', '\r' }, StringSplitOptions.RemoveEmptyEntries);
if (fields.Length >= 4)
{
UInt32 siteCount = UInt32.Parse(fields[0]);
DateTime expirationTime = DateTime.ParseExact(fields[1], dateTimeFormat, null);
result = new License(siteCount, expirationTime, fields[2], fields[3]);
}
}
return(result);
}
/// <summary>
/// 生成给定的<code>License</code>对象的加密文本。如果加密失败，会返回null.
/// 应当只在key不合规范时失败。
/// </summary>
/// <param name="execPath">license-app的可执行文件路径</param>
/// <param name="key">键，不能超过32个字节</param>
/// <param name="license">证书对象，不能为null</param>
/// <returns></returns>
public static byte[] encryptTo(String execPath, byte[] key, License license)
{
StringBuilder keyStr = convertKeyToString(key);
StringBuilder licenseStr = new StringBuilder();
licenseStr.Append(license.SiteCount);
licenseStr.Append(' ');
licenseStr.Append(license.ExpirationTime.ToString(dateTimeFormat));
licenseStr.Append(' ');
licenseStr.Append(license.CompanyName);
licenseStr.Append(' ');
licenseStr.Append(license.SoftwareName);
String args = String.Format("enc {0} {1}", keyStr, licenseStr);
int exitCode = 0;
String resultStr = CmdUtils.RunCommand(execPath, args, ref exitCode);
byte[] result = null;
if (exitCode == 0 && resultStr != "")
{
string[] byteStrs = resultStr.Trim(new char[] { '[', ']', '\r', '\n', ' ' }).Split(',');
//string[] byteStrs = resultStr.Substring(1, resultStr.Length - 2).Split(',');
result = new byte[byteStrs.Length];
for (int i = 0; i < byteStrs.Length; i++)
{
result[i] = byte.Parse(byteStrs[i]);
}
}
return(result);
}