public static string Encode(IEnumerable <string> values, string key = null, IdLinkMode mode = IdLinkMode.SHA1)
{
if (values == null)
{
throw new ArgumentNullException(nameof(values));
}
var tmpArray = values as string[] ?? values.ToArray();
switch (mode)
{
case IdLinkMode.SHA1:
string hash;
using (var alg = SHA1.Create())
{
var plainText = string.Join(string.Empty, tmpArray) + key;
hash = Convert.ToBase64String(alg.ComputeHash(Encoding.UTF8.GetBytes(plainText)));
}
return(Convert.ToBase64String(Encoding.UTF8.GetBytes(string.Join("||", tmpArray) + "||" + hash)));
case IdLinkMode.Aes:
return(AesHelper.Encrypt(string.Join("||", tmpArray), key));
default:
return(Convert.ToBase64String(Encoding.UTF8.GetBytes(string.Join("||", tmpArray))));
}
}
public static string EncodeObject(object value, string key = null, IdLinkMode mode = IdLinkMode.SHA1)
{
if (value == null)
{
throw new ArgumentNullException(nameof(value));
}
var json = JsonConvert.SerializeObject(value, Formatting.None, new JsonSerializerSettings {
NullValueHandling = NullValueHandling.Ignore
});
switch (mode)
{
case IdLinkMode.SHA1:
string hash;
using (var alg = SHA1.Create())
{
hash = Convert.ToBase64String(alg.ComputeHash(Encoding.UTF8.GetBytes(json + key)));
}
return(Convert.ToBase64String(Encoding.UTF8.GetBytes(json + "||" + hash)));
case IdLinkMode.Aes:
return(AesHelper.Encrypt(json, key));
default:
return(Convert.ToBase64String(Encoding.UTF8.GetBytes(json)));
}
}
public static T DecodeObject <T>(string idLink, string key = null, IdLinkMode mode = IdLinkMode.SHA1)
{
if (idLink == null)
{
throw new ArgumentNullException(nameof(idLink));
}
byte[] array;
try
{
array = Convert.FromBase64String(idLink);
}
catch
{
return(default);
public static string[] Decode(string idLink, string key = null, IdLinkMode mode = IdLinkMode.SHA1)
{
if (idLink == null)
{
throw new ArgumentNullException(nameof(idLink));
}
byte[] array;
try
{
array = Convert.FromBase64String(idLink);
}
catch
{
return(null);
}
string[] values;
switch (mode)
{
case IdLinkMode.Aes:
try
{
values = AesHelper.Decrypt(array, key).Split(new[] { "||" }, StringSplitOptions.None);
}
catch
{
return(null);
}
break;
//case IdLinkMode.MD5:
// values = Encoding.UTF8.GetString(array).Split(new[] { "||" }, StringSplitOptions.None);
// if (values.Length == 1)
// return null;
// using (var alg = MD5.Create())
// {
// var hashed = values[values.Length - 1];
// Array.Resize(ref values, values.Length - 1);
// var plainText = string.Join(string.Empty, values) + key;
// var hash = Convert.ToBase64String(alg.ComputeHash(Encoding.UTF8.GetBytes(plainText)));
// if (hashed != hash)
// return null;
// }
// break;
case IdLinkMode.SHA1:
values = Encoding.UTF8.GetString(array).Split(new[] { "||" }, StringSplitOptions.None);
if (values.Length == 1)
{
return(null);
}
using (var alg = SHA1.Create())
{
var hashed = values[values.Length - 1];
Array.Resize(ref values, values.Length - 1);
var plainText = string.Join(string.Empty, values) + key;
var hash = Convert.ToBase64String(alg.ComputeHash(Encoding.UTF8.GetBytes(plainText)));
if (hashed != hash)
{
return(null);
}
}
break;
//case IdLinkMode.SHA256:
// values = Encoding.UTF8.GetString(array).Split(new[] { "||" }, StringSplitOptions.None);
// if (values.Length == 1)
// return null;
// using (var alg = SHA256.Create())
// {
// var hashed = values[values.Length - 1];
// Array.Resize(ref values, values.Length - 1);
// var plainText = string.Join(string.Empty, values) + key;
// var hash = Convert.ToBase64String(alg.ComputeHash(Encoding.UTF8.GetBytes(plainText)));
// if (hashed != hash)
// return null;
// }
// break;
default:
values = Encoding.UTF8.GetString(array).Split(new[] { "||" }, StringSplitOptions.None);
break;
}
return(values);
}
