CroakFang
36 lines
1.1 KiB
C#
36 lines
1.1 KiB
C#
using BaseNcoding;
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using System;
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using System.Security.Cryptography;
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using System.Text;
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using UnityEngine;
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public class ManifestEntry
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{
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public static byte[] CalHame(ulong checksum, ulong size, byte[] name)
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{
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if (name == null) return null;
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SHA1CryptoServiceProvider sha1 = new SHA1CryptoServiceProvider();
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byte[] allbyte = new byte[name.Length + 16];
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byte[] checksumByte = BitConverter.GetBytes(checksum);
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byte[] sizeByte = BitConverter.GetBytes(size);
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for (int i = 0; i < 16; i++)
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{
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allbyte[i] = (i < 8 ? checksumByte[7 - i] : sizeByte[15 - i]);
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}
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Buffer.BlockCopy(name, 0, allbyte, 16, name.Length);
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return sha1.ComputeHash(allbyte);
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}
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public static string CalHameString(ulong checksum, ulong size, byte[] name)
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{
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var bytes = CalHame(checksum, size, name);
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Base32 base32 = new Base32();
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return base32.Encode(bytes);
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}
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public static string CalHameString(ulong checksum, ulong size, string name)
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{
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return CalHameString(checksum, size, Encoding.UTF8.GetBytes(name));
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}
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}
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