2 // System.Security.Policy.Hash
5 // Jackson Harper (Jackson@LatitudeGeo.com)
6 // Sebastien Pouliot <sebastien@ximian.com>
8 // (C) 2002 Jackson Harper, All rights reserved.
9 // Portions (C) 2002 Motus Technologies Inc. (http://www.motus.com)
10 // Copyright (C) 2004 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.
34 using System.Reflection;
35 using System.Runtime.Serialization;
36 using System.Security.Cryptography;
38 namespace System.Security.Policy {
41 [MonoTODO("This doesn't match the MS version perfectly.")]
42 // but it does seems to works exactly like Fx 2.0 beta 1 !?!?!
46 public sealed class Hash : ISerializable, IBuiltInEvidence {
48 private Assembly assembly;
52 internal byte[] _sha1;
54 public Hash (Assembly assembly)
57 throw new ArgumentNullException ("assembly");
58 this.assembly = assembly;
65 internal Hash (SerializationInfo info, StreamingContext context)
67 data = (byte[]) info.GetValue ("RawData", typeof (byte[]));
76 // Case 1: we have a MD5 value - either precalculated or static (FX 2.0)
80 // Case 2: we don't have a MD5 value precalculated so we either
81 // (a): have an assembly reference - and can calculate the hash; or
82 // (b): have been initialized with a static MD5 value (FX 2.0)
84 if ((assembly == null) && (_sha1 != null)) {
85 string msg = Locale.GetText ("No assembly data. This instance was initialized with an MSHA1 digest value.");
86 throw new SecurityException (msg);
89 // fully named to avoid conflit between MD5 property and class name
90 HashAlgorithm hash = System.Security.Cryptography.MD5.Create ();
91 _md5 = GenerateHash (hash);
98 // Case 1: we have a SHA1 value - either precalculated or static (FX 2.0)
102 // Case 2: we don't have a SHA1 value precalculated so we either
103 // (a): have an assembly reference - and can calculate the hash; or
104 // (b): have been initialized with a static MD5 value (FX 2.0)
106 if ((assembly == null) && (_md5 != null)) {
107 string msg = Locale.GetText ("No assembly data. This instance was initialized with an MD5 digest value.");
108 throw new SecurityException (msg);
111 // fully named to avoid conflit between SHA1 property and class name
112 HashAlgorithm hash = System.Security.Cryptography.SHA1.Create ();
113 _sha1 = GenerateHash (hash);
122 public byte[] GenerateHash (HashAlgorithm hashAlg)
125 throw new ArgumentNullException ("hashAlg");
126 return hashAlg.ComputeHash (GetData ());
129 public void GetObjectData (SerializationInfo info, StreamingContext context)
132 throw new ArgumentNullException ("info");
133 info.AddValue ("RawData", GetData ());
136 public override string ToString ()
138 SecurityElement se = new SecurityElement (GetType ().FullName);
139 se.AddAttribute ("version", "1");
141 StringBuilder sb = new StringBuilder ();
142 byte[] raw = GetData ();
143 for (int i=0; i < raw.Length; i++)
144 sb.Append (raw [i].ToString ("X2"));
146 se.AddChild (new SecurityElement ("RawData", sb.ToString ()));
147 return se.ToString ();
154 private byte[] GetData ()
157 if ((assembly == null) && (data == null)) {
158 string msg = Locale.GetText ("No assembly data.");
159 throw new SecurityException (msg);
163 // TODO (Pre-Fx-2.0) we mustn't hash the complete assembly!
164 // ---- Look at ToString (MS version) for what to hash (and what not to)
165 // TODO we must drop the authenticode signature (if present)
166 FileStream stream = new
167 FileStream (assembly.Location, FileMode.Open, FileAccess.Read);
168 data = new byte [stream.Length];
169 stream.Read (data, 0, (int)stream.Length);
175 // interface IBuiltInEvidence
177 int IBuiltInEvidence.GetRequiredSize (bool verbose)
179 return (verbose ? 5 : 0); // as documented
183 int IBuiltInEvidence.InitFromBuffer (char [] buffer, int position)
189 int IBuiltInEvidence.OutputToBuffer (char [] buffer, int position, bool verbose)
195 static public Hash CreateMD5 (byte[] md5)
198 throw new ArgumentNullException ("md5");
199 Hash h = new Hash ();
204 static public Hash CreateSHA1 (byte[] sha1)
207 throw new ArgumentNullException ("sha1");
208 Hash h = new Hash ();