59 lines
2.0 KiB
C#
59 lines
2.0 KiB
C#
using System.Globalization;
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using System.Net.Http.Headers;
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using System.Security.Cryptography;
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using System.Text;
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namespace Manager.YouTube.Util;
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public static class AuthenticationUtilities
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{
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private const string HeaderScheme = "SAPISIDHASH";
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// Dave Thomas & windy for updated answer @ https://stackoverflow.com/a/32065323/9948300
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public static AuthenticationHeaderValue GetSapisidHashHeader(string datasyncId, string sapisid, string origin)
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{
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var strHash = GetSapisidHash(datasyncId, sapisid, origin);
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return new AuthenticationHeaderValue(HeaderScheme, strHash);
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}
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public static string GetSapisidHash(string datasyncId, string sapisid, string origin, string? time = null)
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{
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if (string.IsNullOrWhiteSpace(datasyncId))
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{
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throw new ArgumentNullException(nameof(datasyncId));
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}
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if (string.IsNullOrWhiteSpace(sapisid))
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{
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throw new ArgumentNullException(nameof(sapisid));
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}
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if (string.IsNullOrWhiteSpace(origin))
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{
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throw new ArgumentNullException(nameof(origin));
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}
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datasyncId = datasyncId.Replace("||", "");
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sapisid = Uri.UnescapeDataString(sapisid);
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if (string.IsNullOrWhiteSpace(time))
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{
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time = GetTime();
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}
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var sha1 = HashString($"{datasyncId} {time} {sapisid} {origin}");
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var completeHash = $"{time}_{sha1}_u";
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return completeHash;
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}
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private static string HashString(string stringData)
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{
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var dataBytes = Encoding.ASCII.GetBytes(stringData);
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var hashData = SHA1.HashData(dataBytes);
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return hashData.Aggregate(string.Empty, (current, item) => current + item.ToString("x2"));
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}
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private static string GetTime()
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{
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var st = new DateTime(1970, 1, 1);
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var t = DateTime.Now.ToUniversalTime() - st;
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var time = (t.TotalMilliseconds + 0.5).ToString(CultureInfo.InvariantCulture);
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return time[..10];
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}
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} |