2 // System.Reflection.StrongNameKeyPair.cs
5 // Kevin Winchester (kwin@ns.sympatico.ca)
6 // Sebastien Pouliot (sebastien@ximian.com)
8 // (C) 2002 Kevin Winchester
9 // Portions (C) 2002 Motus Technologies Inc. (http://www.motus.com)
10 // Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
12 // Permission is hereby granted, free of charge, to any person obtaining
13 // a copy of this software and associated documentation files (the
14 // "Software"), to deal in the Software without restriction, including
15 // without limitation the rights to use, copy, modify, merge, publish,
16 // distribute, sublicense, and/or sell copies of the Software, and to
17 // permit persons to whom the Software is furnished to do so, subject to
18 // the following conditions:
20 // The above copyright notice and this permission notice shall be
21 // included in all copies or substantial portions of the Software.
23 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
27 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
28 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
29 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
33 using System.Security.Cryptography;
34 using System.Security.Permissions;
35 using System.Runtime.InteropServices;
36 using System.Runtime.Serialization;
39 using Mono.Security.Cryptography;
41 namespace System.Reflection {
47 public class StrongNameKeyPair
49 : ISerializable, IDeserializationCallback
52 private byte[] _publicKey;
53 private string _keyPairContainer;
54 private bool _keyPairExported;
55 private byte[] _keyPairArray;
60 // note: we ask for UnmanagedCode because we do not want everyone
61 // to be able to generate strongnamed assemblies
63 [SecurityPermission (SecurityAction.Demand, UnmanagedCode = true)]
64 public StrongNameKeyPair (byte[] keyPairArray)
66 if (keyPairArray == null)
67 throw new ArgumentNullException ("keyPairArray");
69 LoadKey (keyPairArray);
73 [SecurityPermission (SecurityAction.Demand, UnmanagedCode = true)]
74 public StrongNameKeyPair (FileStream keyPairFile)
76 if (keyPairFile == null)
77 throw new ArgumentNullException ("keyPairFile");
79 byte[] input = new byte [keyPairFile.Length];
80 keyPairFile.Read (input, 0, input.Length);
85 [SecurityPermission (SecurityAction.Demand, UnmanagedCode = true)]
86 public StrongNameKeyPair (string keyPairContainer)
88 // named key container
89 if (keyPairContainer == null)
90 throw new ArgumentNullException ("keyPairContainer");
92 _keyPairContainer = keyPairContainer;
96 protected StrongNameKeyPair (SerializationInfo info, StreamingContext context)
98 _publicKey = (byte []) info.GetValue ("_publicKey", typeof (byte []));
99 _keyPairContainer = info.GetString ("_keyPairContainer");
100 _keyPairExported = info.GetBoolean ("_keyPairExported");
101 _keyPairArray = (byte []) info.GetValue ("_keyPairArray", typeof (byte []));
104 void ISerializable.GetObjectData (SerializationInfo info, StreamingContext context)
106 info.AddValue ("_publicKey", _publicKey, typeof (byte []));
107 info.AddValue ("_keyPairContainer", _keyPairContainer);
108 info.AddValue ("_keyPairExported", _keyPairExported);
109 info.AddValue ("_keyPairArray", _keyPairArray, typeof (byte []));
112 void IDeserializationCallback.OnDeserialization (object sender)
116 private RSA GetRSA ()
118 if (_rsa != null) return _rsa;
120 if (_keyPairArray != null) {
122 _rsa = CryptoConvert.FromCapiKeyBlob (_keyPairArray);
125 // exception is thrown when getting PublicKey
126 // to match MS implementation
127 _keyPairArray = null;
130 else if (_keyPairContainer != null) {
131 CspParameters csp = new CspParameters ();
132 csp.KeyContainerName = _keyPairContainer;
133 _rsa = new RSACryptoServiceProvider (csp);
138 private void LoadKey (byte[] key)
141 // check for ECMA key
142 if (key.Length == 16) {
145 while (i < key.Length)
148 // it is the ECMA key
149 _publicKey = (byte[]) key.Clone ();
157 // exception is thrown when getting PublicKey
158 // to match MS implementation
162 public byte[] PublicKey {
164 if (_publicKey == null) {
166 // ECMA "key" is valid but doesn't produce a RSA instance
168 throw new ArgumentException ("invalid keypair");
170 byte[] blob = CryptoConvert.ToCapiKeyBlob (rsa, false);
171 _publicKey = new byte [blob.Length + 12];
172 // The first 12 bytes are documented at:
173 // http://msdn.microsoft.com/library/en-us/cprefadd/html/grfungethashfromfile.asp
174 // ALG_ID - Signature
175 _publicKey[0] = 0x00;
176 _publicKey[1] = 0x24;
177 _publicKey[2] = 0x00;
178 _publicKey[3] = 0x00;
180 _publicKey[4] = 0x04;
181 _publicKey[5] = 0x80;
182 _publicKey[6] = 0x00;
183 _publicKey[7] = 0x00;
184 // Length of Public Key (in bytes)
185 int lastPart = blob.Length;
186 _publicKey[8] = (byte)(lastPart % 256);
187 _publicKey[9] = (byte)(lastPart / 256); // just in case
188 _publicKey[10] = 0x00;
189 _publicKey[11] = 0x00;
191 Buffer.BlockCopy (blob, 0, _publicKey, 12, blob.Length);
197 internal StrongName StrongName ()
201 return new StrongName (rsa);
202 if (_publicKey != null)
203 return new StrongName (_publicKey);