+++ /dev/null
-//
-// StrongNameManager.cs - StrongName Management
-//
-// Author:
-// Sebastien Pouliot <sebastien@ximian.com>
-//
-// (C) 2004 Novell (http://www.novell.com)
-//
-
-using System;
-using System.Collections;
-using System.Globalization;
-using System.IO;
-using System.Reflection;
-using System.Security;
-using System.Security.Cryptography;
-using System.Text;
-
-using Mono.Security.Cryptography;
-using Mono.Xml;
-
-namespace Mono.Security {
-
- /* RUNTIME
- * yes
- * in_gac ---------------------------------\
- * | |
- * | no \/
- * | return true
- * CLASS LIBRARY|
- * |
- * |
- * |
- * bool StrongNameManager.MustVerify
- * |
- * |
- * \/ not found
- * Token --------------------------\
- * | |
- * | present ? |
- * | |
- * \/ not found |
- * Assembly Name --------------------------|
- * | |
- * | present ? |
- * | or "*" |
- * \/ not found |
- * User ---------------------------|
- * | |
- * | present ? |
- * | or "*" |
- * \/ \/
- * return false return true
- * SKIP VERIFICATION VERIFY ASSEMBLY
- */
-
- internal class StrongNameManager {
-
- private class Element {
- internal Hashtable assemblies;
-
- public Element ()
- {
- assemblies = new Hashtable ();
- }
-
- public Element (string assembly, string users) : this ()
- {
- assemblies.Add (assembly, users);
- }
-
- public string GetUsers (string assembly)
- {
- return (string) assemblies [assembly];
- }
- }
-
- static private Hashtable mappings;
- static private Hashtable tokens;
-
- static StrongNameManager ()
- {
- }
-
- // note: more than one configuration file can be loaded at the
- // same time (e.g. user specific and machine specific config).
- static public void LoadConfig (string filename)
- {
- if (File.Exists (filename)) {
- SecurityParser sp = new SecurityParser ();
- using (StreamReader sr = new StreamReader (filename)) {
- string xml = sr.ReadToEnd ();
- sp.LoadXml (xml);
- }
- SecurityElement root = sp.ToXml ();
- if ((root != null) && (root.Tag == "configuration")) {
- SecurityElement strongnames = root.SearchForChildByTag ("strongNames");
- if ((strongnames != null) && (strongnames.Children.Count > 0)) {
- SecurityElement mapping = strongnames.SearchForChildByTag ("pubTokenMapping");
- if ((mapping != null) && (mapping.Children.Count > 0)) {
- LoadMapping (mapping);
- }
-
- SecurityElement settings = strongnames.SearchForChildByTag ("verificationSettings");
- if ((settings != null) && (settings.Children.Count > 0)) {
- LoadVerificationSettings (settings);
- }
- }
- }
- }
- }
-
- static private void LoadMapping (SecurityElement mapping)
- {
- if (mappings == null) {
- mappings = new Hashtable ();
- }
-
- lock (mappings.SyncRoot) {
- foreach (SecurityElement item in mapping.Children) {
- if (item.Tag != "map")
- continue;
-
- string token = item.Attribute ("Token");
- if ((token == null) || (token.Length != 16))
- continue; // invalid entry
- token = token.ToUpper (CultureInfo.InvariantCulture);
-
- string publicKey = item.Attribute ("PublicKey");
- if (publicKey == null)
- continue; // invalid entry
-
- // watch for duplicate entries
- if (mappings [token] == null) {
- mappings.Add (token, publicKey);
- }
- else {
- // replace existing mapping
- mappings [token] = publicKey;
- }
- }
- }
- }
-
- static private void LoadVerificationSettings (SecurityElement settings)
- {
- if (tokens == null) {
- tokens = new Hashtable ();
- }
-
- lock (tokens.SyncRoot) {
- foreach (SecurityElement item in settings.Children) {
- if (item.Tag != "skip")
- continue;
-
- string token = item.Attribute ("Token");
- if (token == null)
- continue; // bad entry
- token = token.ToUpper (CultureInfo.InvariantCulture);
-
- string assembly = item.Attribute ("Assembly");
- if (assembly == null)
- assembly = "*";
-
- string users = item.Attribute ("Users");
- if (users == null)
- users = "*";
-
- Element el = (Element) tokens [token];
- if (el == null) {
- // new token
- el = new Element (assembly, users);
- tokens.Add (token, el);
- continue;
- }
-
- // existing token
- string a = (string) el.assemblies [assembly];
- if (a == null) {
- // new assembly
- el.assemblies.Add (assembly, users);
- continue;
- }
-
- // existing assembly
- if (users == "*") {
- // all users (drop current users)
- el.assemblies [assembly] = "*";
- continue;
- }
-
- // new users, add to existing
- string existing = (string) el.assemblies [assembly];
- string newusers = String.Concat (existing, ",", users);
- el.assemblies [assembly] = newusers;
- }
- }
- }
-
- static public byte[] GetMappedPublicKey (byte[] token)
- {
- if ((mappings == null) || (token == null))
- return null;
-
- string t = CryptoConvert.ToHex (token);
- string pk = (string) mappings [t];
- if (pk == null)
- return null;
-
- return CryptoConvert.FromHex (pk);
- }
-
- // it is possible to skip verification for assemblies
- // or a strongname public key using the "sn" tool.
- // note: only the runtime checks if the assembly is loaded
- // from the GAC to skip verification
- static public bool MustVerify (AssemblyName an)
- {
- if ((an == null) || (tokens == null))
- return true;
-
- string token = CryptoConvert.ToHex (an.GetPublicKeyToken ());
- Element el = (Element) tokens [token];
- if (el != null) {
- // look for this specific assembly first
- string users = el.GetUsers (an.Name);
- if (users == null) {
- // nothing for the specific assembly
- // so look for "*" assembly
- users = el.GetUsers ("*");
- }
-
- if (users != null) {
- // applicable to any user ?
- if (users == "*")
- return false;
- // applicable to the current user ?
- return (users.IndexOf (Environment.UserName) < 0);
- }
- }
-
- // we must check verify the strongname on the assembly
- return true;
- }
-
- public override string ToString ()
- {
- StringBuilder sb = new StringBuilder ();
- sb.Append ("Public Key Token\tAssemblies\t\tUsers");
- sb.Append (Environment.NewLine);
- if (tokens == null) {
- sb.Append ("none");
- return sb.ToString ();
- }
-
- foreach (DictionaryEntry token in tokens) {
- sb.Append ((string)token.Key);
- Element t = (Element) token.Value;
- bool first = true;
- foreach (DictionaryEntry assembly in t.assemblies) {
- if (first) {
- sb.Append ("\t");
- first = false;
- }
- else {
- sb.Append ("\t\t\t");
- }
- sb.Append ((string)assembly.Key);
- sb.Append ("\t");
- string users = (string)assembly.Value;
- if (users == "*")
- users = "All users";
- sb.Append (users);
- sb.Append (Environment.NewLine);
- }
- }
- return sb.ToString ();
- }
- }
-}
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