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Viewing changes to external/ikvm/reflect/StrongNameKeyPair.cs

  • Committer: Package Import Robot
  • Author(s): Jo Shields
  • Date: 2013-05-12 09:46:03 UTC
  • mto: This revision was merged to the branch mainline in revision 29.
  • Revision ID: package-import@ubuntu.com-20130512094603-mad323bzcxvmcam0
Tags: upstream-4.0.5+dfsg
Import upstream version 4.0.5+dfsg

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external/ikvm/reflect/StrongNameKeyPair.cs
 
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/*
 
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  Copyright (C) 2009-2012 Jeroen Frijters
 
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  This software is provided 'as-is', without any express or implied
 
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  warranty.  In no event will the authors be held liable for any damages
 
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  arising from the use of this software.
 
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  Permission is granted to anyone to use this software for any purpose,
 
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  including commercial applications, and to alter it and redistribute it
 
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  freely, subject to the following restrictions:
 
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  1. The origin of this software must not be misrepresented; you must not
 
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     claim that you wrote the original software. If you use this software
 
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     in a product, an acknowledgment in the product documentation would be
 
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     appreciated but is not required.
 
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  2. Altered source versions must be plainly marked as such, and must not be
 
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     misrepresented as being the original software.
 
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  3. This notice may not be removed or altered from any source distribution.
 
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  Jeroen Frijters
 
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  jeroen@frijters.net
 
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*/
 
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using System;
 
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using System.IO;
 
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using System.Security.Cryptography;
 
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namespace IKVM.Reflection
 
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{
 
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        public sealed class StrongNameKeyPair
 
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        {
 
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                private readonly byte[] keyPairArray;
 
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                private readonly string keyPairContainer;
 
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                public StrongNameKeyPair(string keyPairContainer)
 
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                {
 
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                        if (keyPairContainer == null)
 
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                        {
 
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                                throw new ArgumentNullException("keyPairContainer");
 
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                        }
 
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                        if (Universe.MonoRuntime && Environment.OSVersion.Platform == PlatformID.Win32NT)
 
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                        {
 
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                                throw new NotSupportedException("IKVM.Reflection does not support key containers when running on Mono");
 
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                        }
 
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                        this.keyPairContainer = keyPairContainer;
 
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                }
 
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                public StrongNameKeyPair(byte[] keyPairArray)
 
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                {
 
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                        if (keyPairArray == null)
 
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                        {
 
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                                throw new ArgumentNullException("keyPairArray");
 
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                        }
 
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                        this.keyPairArray = (byte[])keyPairArray.Clone();
 
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                }
 
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                public StrongNameKeyPair(FileStream keyPairFile)
 
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                        : this(ReadAllBytes(keyPairFile))
 
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                {
 
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                }
 
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                private static byte[] ReadAllBytes(FileStream keyPairFile)
 
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                {
 
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                        if (keyPairFile == null)
 
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                        {
 
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                                throw new ArgumentNullException("keyPairFile");
 
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                        }
 
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                        byte[] buf = new byte[keyPairFile.Length - keyPairFile.Position];
 
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                        keyPairFile.Read(buf, 0, buf.Length);
 
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                        return buf;
 
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                }
 
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                public byte[] PublicKey
 
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                {
 
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                        get
 
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                        {
 
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                                if (Universe.MonoRuntime)
 
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                                {
 
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                                        // MONOBUG workaround for https://bugzilla.xamarin.com/show_bug.cgi?id=5299
 
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                                        return MonoGetPublicKey();
 
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                                }
 
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                                using (RSACryptoServiceProvider rsa = CreateRSA())
 
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                                {
 
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                                        byte[] cspBlob = rsa.ExportCspBlob(false);
 
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                                        byte[] publicKey = new byte[12 + cspBlob.Length];
 
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                                        Buffer.BlockCopy(cspBlob, 0, publicKey, 12, cspBlob.Length);
 
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                                        publicKey[1] = 36;
 
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                                        publicKey[4] = 4;
 
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                                        publicKey[5] = 128;
 
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                                        publicKey[8] = (byte)(cspBlob.Length >> 0);
 
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                                        publicKey[9] = (byte)(cspBlob.Length >> 8);
 
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                                        publicKey[10] = (byte)(cspBlob.Length >> 16);
 
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                                        publicKey[11] = (byte)(cspBlob.Length >> 24);
 
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                                        return publicKey;
 
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                                }
 
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                        }
 
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                }
 
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                internal RSACryptoServiceProvider CreateRSA()
 
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                {
 
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                        try
 
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                        {
 
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                                if (keyPairArray != null)
 
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                                {
 
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                                        RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
 
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                                        rsa.ImportCspBlob(keyPairArray);
 
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                                        return rsa;
 
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                                }
 
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                                else
 
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                                {
 
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                                        CspParameters parm = new CspParameters();
 
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                                        parm.KeyContainerName = keyPairContainer;
 
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                                        // MONOBUG Mono doesn't like it when Flags or KeyNumber are set
 
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                                        if (!Universe.MonoRuntime)
 
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                                        {
 
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                                                parm.Flags = CspProviderFlags.UseMachineKeyStore | CspProviderFlags.UseExistingKey;
 
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                                                parm.KeyNumber = 2;     // Signature
 
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                                        }
 
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                                        return new RSACryptoServiceProvider(parm);
 
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                                }
 
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                        }
 
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                        catch
 
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                        {
 
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                                throw new ArgumentException("Unable to obtain public key for StrongNameKeyPair.");
 
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                        }
 
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                }
 
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                [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.NoInlining)]
 
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                private byte[] MonoGetPublicKey()
 
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                {
 
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                        return keyPairArray != null
 
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                                ? new System.Reflection.StrongNameKeyPair(keyPairArray).PublicKey
 
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                                : new System.Reflection.StrongNameKeyPair(keyPairContainer).PublicKey;
 
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                }
 
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        }
 
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}