71 lines
1.3 KiB
C#
71 lines
1.3 KiB
C#
//
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// Mono.Security.Cryptography.SHA1CryptoServiceProvider
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//
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// Authors:
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// Sebastien Pouliot (spouliot@motus.com)
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//
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// Copyright (C) 2003 Motus Technologies Inc. (http://www.motus.com)
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//
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using System;
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using System.Security.Cryptography;
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namespace Mono.Security.Cryptography {
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public class SHA1CryptoServiceProvider : SHA1 {
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private CapiHash hash;
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public SHA1CryptoServiceProvider ()
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{
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hash = null;
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}
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~SHA1CryptoServiceProvider ()
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{
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Dispose (true);
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}
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// 2 cases:
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// a. we were calculing a hash and want to abort
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// b. we haven't started yet
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public override void Initialize ()
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{
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State = 0;
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if (hash == null) {
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hash = new CapiHash (CryptoAPI.CALG_SHA1);
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}
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}
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protected override void Dispose (bool disposing)
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{
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if (hash != null) {
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hash.Dispose ();
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hash = null;
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// there's no unmanaged resources (so disposing isn't used)
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}
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}
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protected override void HashCore (byte[] rgb, int ibStart, int cbSize)
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{
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if (State == 0)
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Initialize ();
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if (hash == null)
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throw new ObjectDisposedException ("SHA1CryptoServiceProvider");
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State = 1;
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hash.HashCore (rgb, ibStart, cbSize);
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}
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protected override byte[] HashFinal ()
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{
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if (hash == null)
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throw new ObjectDisposedException ("SHA1CryptoServiceProvider");
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State = 0;
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byte[] result = hash.HashFinal ();
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Dispose (false);
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return result;
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}
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}
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}
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