niko
90 lines
2.2 KiB
C#
90 lines
2.2 KiB
C#
using System;
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using System.Security.Cryptography;
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namespace Mono.Security.Cryptography
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{
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// Token: 0x020000A7 RID: 167
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internal class MACAlgorithm
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{
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// Token: 0x06000930 RID: 2352 RVA: 0x000248BC File Offset: 0x00022ABC
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public MACAlgorithm(SymmetricAlgorithm algorithm)
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{
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this.algo = algorithm;
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this.algo.Mode = CipherMode.CBC;
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this.blockSize = this.algo.BlockSize >> 3;
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this.algo.IV = new byte[this.blockSize];
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this.block = new byte[this.blockSize];
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}
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// Token: 0x06000931 RID: 2353 RVA: 0x0002491C File Offset: 0x00022B1C
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public void Initialize(byte[] key)
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{
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this.algo.Key = key;
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if (this.enc == null)
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{
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this.enc = this.algo.CreateEncryptor();
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}
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Array.Clear(this.block, 0, this.blockSize);
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this.blockCount = 0;
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}
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// Token: 0x06000932 RID: 2354 RVA: 0x0002496C File Offset: 0x00022B6C
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public void Core(byte[] rgb, int ib, int cb)
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{
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int num = Math.Min(this.blockSize - this.blockCount, cb);
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Array.Copy(rgb, ib, this.block, this.blockCount, num);
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this.blockCount += num;
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if (this.blockCount == this.blockSize)
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{
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this.enc.TransformBlock(this.block, 0, this.blockSize, this.block, 0);
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int num2 = (cb - num) / this.blockSize;
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for (int i = 0; i < num2; i++)
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{
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this.enc.TransformBlock(rgb, num, this.blockSize, this.block, 0);
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num += this.blockSize;
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}
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this.blockCount = cb - num;
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if (this.blockCount > 0)
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{
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Array.Copy(rgb, num, this.block, 0, this.blockCount);
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}
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}
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}
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// Token: 0x06000933 RID: 2355 RVA: 0x00024A4C File Offset: 0x00022C4C
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public byte[] Final()
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{
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byte[] array;
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if (this.blockCount > 0 || (this.algo.Padding != PaddingMode.Zeros && this.algo.Padding != PaddingMode.None))
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{
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array = this.enc.TransformFinalBlock(this.block, 0, this.blockCount);
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}
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else
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{
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array = (byte[])this.block.Clone();
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}
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if (!this.enc.CanReuseTransform)
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{
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this.enc.Dispose();
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this.enc = null;
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}
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return array;
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}
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// Token: 0x040001FB RID: 507
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private SymmetricAlgorithm algo;
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// Token: 0x040001FC RID: 508
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private ICryptoTransform enc;
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// Token: 0x040001FD RID: 509
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private byte[] block;
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// Token: 0x040001FE RID: 510
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private int blockSize;
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// Token: 0x040001FF RID: 511
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private int blockCount;
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}
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}
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