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Diffstat (limited to 'Runtime/Export/Security.cs')
| -rw-r--r-- | Runtime/Export/Security.cs | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/Runtime/Export/Security.cs b/Runtime/Export/Security.cs new file mode 100644 index 0000000..8d0dbad --- /dev/null +++ b/Runtime/Export/Security.cs @@ -0,0 +1,122 @@ +#if !UNITY_WINRT +using System; +using System.IO; +using System.Security; +using System.Security.Cryptography; +using System.Reflection; +using System.Collections.Generic; +using Mono.Security; +using Mono.Security.Cryptography; + +namespace UnityEngine +{ + public sealed partial class Security + { + #if UNITY_EDITOR || UNITY_WEBPLAYER + static List<Assembly> _verifiedAssemblies = new List<Assembly>(); + #endif + + static MethodInfo GetUnityCrossDomainHelperMethod(string methodname) + { + //todo: enter strong name with public key here + Type type = Types.GetType ("UnityEngine.UnityCrossDomainHelper", "CrossDomainPolicyParser, Version=1.0.0.0, Culture=neutral"); + if (type == null) + throw new SecurityException("Cant find type UnityCrossDomainHelper"); + var result = type.GetMethod (methodname); + if (result == null) + throw new SecurityException("Cant find "+methodname); + return result; + } + + internal static string TokenToHex (byte[] token) + { + if (null == token || 8 > token.Length) + return string.Empty; + + return string.Format ("{0:x2}{1:x2}{2:x2}{3:x2}{4:x2}{5:x2}{6:x2}{7:x2}", + token[0], + token[1], + token[2], + token[3], + token[4], + token[5], + token[6], + token[7] + ); + } + + #if UNITY_EDITOR + internal static void ClearVerifiedAssemblies () + { + _verifiedAssemblies.Clear (); + } + #endif + + [SecuritySafeCritical] + public static Assembly LoadAndVerifyAssembly (byte[] assemblyData) + { + #if UNITY_EDITOR || UNITY_WEBPLAYER + var assembly = Assembly.Load (assemblyData); + byte[] publicKey = assembly.GetName ().GetPublicKey (); + if (null == publicKey || 0 == publicKey.Length) + return null; + + var rsa = new RSACryptoServiceProvider (); + rsa.ImportCspBlob (publicKey); + var strongName = new StrongName (rsa); + using (var stream = new MemoryStream (assemblyData)) + { + if (strongName.Verify (stream)) + { + _verifiedAssemblies.Add(assembly); + return assembly; + } else + { + return null; + } + } + #else + return null; + #endif + } + +#if UNITY_EDITOR + static readonly string kSignatureExtension = ".signature"; + + internal static bool VerifySignature (string file, byte[] publicKey) + { + try { + string signature = file + kSignatureExtension; + if (!File.Exists (signature)) + return false; + + using (var provider = new RSACryptoServiceProvider ()) + { + provider.ImportCspBlob (publicKey); + using (var sha1 = new SHA1CryptoServiceProvider ()) + return provider.VerifyData (File.ReadAllBytes (file), sha1, File.ReadAllBytes (signature)); + } + } catch (Exception e) { + Debug.LogException (e); + } + return false; + } +#endif + } + + public static class Types + { + public static Type GetType(string typeName, string assemblyName) + { + try + { + return Assembly.Load(assemblyName).GetType(typeName); + } + catch (Exception) + { + return null; + } + } + } +} +#endif
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