30 lines
934 B
C#
30 lines
934 B
C#
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using System.Runtime.CompilerServices;
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namespace Quasar.Common.Cryptography
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{
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public class SafeComparison
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{
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/// <summary>
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/// Compares two byte arrays for equality.
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/// </summary>
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/// <param name="a1">Byte array to compare</param>
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/// <param name="a2">Byte array to compare</param>
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/// <returns>True if equal, else false</returns>
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/// <remarks>
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/// Assumes that the byte arrays have the same length.
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/// This method is safe against timing attacks.
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/// </remarks>
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[MethodImpl(MethodImplOptions.NoInlining | MethodImplOptions.NoOptimization)]
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public static bool AreEqual(byte[] a1, byte[] a2)
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{
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bool result = true;
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for (int i = 0; i < a1.Length; ++i)
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{
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if (a1[i] != a2[i])
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result = false;
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}
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return result;
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}
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}
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}
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