/// <summary>
/// 文件加密长字符串专用
/// </summary>
/// <param name="value"></param>
/// <returns></returns>
public static byte[] SM4EncryptBinary(byte[] value)
{
if (value.Length < 1)
{
return(value);
}
string basestri = Encoding.UTF8.GetString(value);
var ciphertext = SM4EncryptHelper.is_sm4_ciphertext(basestri, basestri.Length);
if (ciphertext == (int)SM4_ERROR_CODE.SM4_SUCCESS)
{
return(value);
}
string base64str = Convert.ToBase64String(value);
int outlen = 0;
IntPtr ip = IntPtr.Zero;
var iflg = SM4EncryptHelper.sm4_encrypt_binary(base64str, base64str.Length, out ip, out outlen);
if (iflg == (int)SM4_ERROR_CODE.SM4_SUCCESS)
{
byte[] array = new byte[outlen];
Marshal.Copy(ip, array, 0, outlen);
SM4EncryptHelper.sm4_freebuf(out ip);
return(array);
}
SM4EncryptHelper.sm4_freebuf(out ip);
return(new byte[0]);
}
/// <summary>
/// sm4加密
/// </summary>
/// <param name="value">原始字段</param>
/// <returns>加密数据</returns>
public static string SM4Encrypt(string value)
{
if (string.IsNullOrEmpty(value))
{
return("");
}
var ciphertext = SM4EncryptHelper.is_sm4_ciphertext(value, value.Length);
if (ciphertext == (int)SM4_ERROR_CODE.SM4_SUCCESS)
{
return(value);
}
int outlen = 0;
IntPtr ip = IntPtr.Zero;
var iflg = SM4EncryptHelper.sm4_encrypt(value, value.Length, out ip, out outlen);
string result = "";
if (iflg == (int)SM4_ERROR_CODE.SM4_SUCCESS)
{
byte[] array = new byte[outlen];
Marshal.Copy(ip, array, 0, outlen);
result = Encoding.UTF8.GetString(array);
}
SM4EncryptHelper.sm4_freebuf(out ip);
return(result);
}
