48 lines
1.2 KiB
C#
48 lines
1.2 KiB
C#
namespace ASC.Security.Cryptography;
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[Singletone]
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public class MachinePseudoKeys
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{
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private readonly byte[] _confKey = null;
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public MachinePseudoKeys(IConfiguration configuration)
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{
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var key = configuration["core:machinekey"];
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if (string.IsNullOrEmpty(key))
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{
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key = configuration["asc:common.machinekey"];
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}
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if (!string.IsNullOrEmpty(key))
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{
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_confKey = Encoding.UTF8.GetBytes(key);
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}
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}
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public byte[] GetMachineConstant()
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{
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if (_confKey != null)
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{
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return _confKey;
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}
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var path = typeof(MachinePseudoKeys).Assembly.Location;
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var fi = new FileInfo(path);
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return BitConverter.GetBytes(fi.CreationTime.ToOADate());
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}
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public byte[] GetMachineConstant(int bytesCount)
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{
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var cnst = Enumerable.Repeat<byte>(0, sizeof(int)).Concat(GetMachineConstant()).ToArray();
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var icnst = BitConverter.ToInt32(cnst, cnst.Length - sizeof(int));
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var rnd = new AscRandom(icnst);
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var buff = new byte[bytesCount];
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rnd.NextBytes(buff);
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return buff;
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}
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}
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