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optimize hash computation

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rootdarkarchon
2023-03-27 11:37:39 +02:00
parent 1aa0563fc0
commit 4cabc39e45
4 changed files with 57 additions and 32 deletions
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33
MareSynchronos/Utils/Crypto.cs
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@@ -6,6 +6,9 @@ namespace MareSynchronos.Utils;
public static class Crypto
{
private static readonly Dictionary<string, string> _hashListSHA1 = new(StringComparer.Ordinal);
private static readonly Dictionary<string, string> _hashListSHA256 = new(StringComparer.Ordinal);
#pragma warning disable SYSLIB0021 // Type or member is obsolete
public static string GetFileHash(this string filePath)
@@ -16,20 +19,40 @@ public static class Crypto
public static string GetHash(this string stringToHash)
{
using SHA1CryptoServiceProvider cryptoProvider = new();
return BitConverter.ToString(cryptoProvider.ComputeHash(Encoding.UTF8.GetBytes(stringToHash))).Replace("-", "", StringComparison.Ordinal);
return GetOrComputeHashSHA1(stringToHash);
}
public static string GetHash256(this string stringToHash)
{
using SHA256CryptoServiceProvider cryptoProvider = new();
return BitConverter.ToString(cryptoProvider.ComputeHash(Encoding.UTF8.GetBytes(stringToHash))).Replace("-", "", StringComparison.Ordinal);
return GetOrComputeHashSHA256(stringToHash);
}
public static string GetHash256(this PlayerCharacter character)
{
var charName = character.Name + character.HomeWorld.Id.ToString();
return GetOrComputeHashSHA256(charName);
}
private static string GetOrComputeHashSHA1(string stringToCompute)
{
if (_hashListSHA1.TryGetValue(stringToCompute, out var hash))
return hash;
using SHA1CryptoServiceProvider cryptoProvider = new();
var computedHash = BitConverter.ToString(cryptoProvider.ComputeHash(Encoding.UTF8.GetBytes(stringToCompute))).Replace("-", "", StringComparison.Ordinal);
_hashListSHA1[stringToCompute] = computedHash;
return computedHash;
}
private static string GetOrComputeHashSHA256(string stringToCompute)
{
if (_hashListSHA256.TryGetValue(stringToCompute, out var hash))
return hash;
using SHA256CryptoServiceProvider cryptoProvider = new();
return BitConverter.ToString(cryptoProvider.ComputeHash(Encoding.UTF8.GetBytes(character.Name + character.HomeWorld.Id.ToString()))).Replace("-", "", StringComparison.Ordinal);
var computedHash = BitConverter.ToString(cryptoProvider.ComputeHash(Encoding.UTF8.GetBytes(stringToCompute))).Replace("-", "", StringComparison.Ordinal);
_hashListSHA256[stringToCompute] = computedHash;
return computedHash;
}
#pragma warning restore SYSLIB0021 // Type or member is obsolete