Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / Net / System / Net / NetworkCredential.cs / 2 / NetworkCredential.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Net { using System.IO; using System.Runtime.InteropServices; using System.Security.Cryptography; using System.Security.Permissions; using System.Text; using System.Threading; using Microsoft.Win32; ////// public class NetworkCredential : ICredentials,ICredentialsByHost { private static EnvironmentPermission m_environmentUserNamePermission; private static EnvironmentPermission m_environmentDomainNamePermission; private static readonly object lockingObject = new object(); #if !FEATURE_PAL private static SymmetricAlgorithm s_symmetricAlgorithm; private static RNGCryptoServiceProvider s_random; private static bool s_useTripleDES = false; private byte[] m_userName; private byte[] m_password; private byte[] m_domain; private byte[] m_encryptionIV; private bool m_encrypt = true; #else //FEATURE_PAL private string m_userName; private string m_password; private string m_domain; #endif //FEATURE_PAL public NetworkCredential() { } ///Provides credentials for password-based /// authentication schemes such as basic, digest, NTLM and Kerberos. ////// public NetworkCredential(string userName, string password) : this(userName, password, string.Empty) { } ////// Initializes a new instance of the ////// class with name and password set as specified. /// /// public NetworkCredential(string userName, string password, string domain) : this(userName, password, domain, true) { } ////// Initializes a new instance of the ////// class with name and password set as specified. /// /// internal NetworkCredential(string userName, string password, string domain, bool encrypt) { #if !FEATURE_PAL m_encrypt = encrypt; #endif UserName = userName; Password = password; Domain = domain; } void InitializePart1() { if (m_environmentUserNamePermission == null) { lock(lockingObject) { if (m_environmentUserNamePermission == null) { m_environmentDomainNamePermission = new EnvironmentPermission(EnvironmentPermissionAccess.Read, "USERDOMAIN"); m_environmentUserNamePermission = new EnvironmentPermission(EnvironmentPermissionAccess.Read, "USERNAME"); } } } } void InitializePart2(){ #if !FEATURE_PAL if (m_encrypt) { if (s_symmetricAlgorithm == null) { lock(lockingObject) { if (s_symmetricAlgorithm == null) { SymmetricAlgorithm algorithm; s_useTripleDES = ReadRegFips(); if (s_useTripleDES) { algorithm = new TripleDESCryptoServiceProvider(); algorithm.KeySize = 128; algorithm.GenerateKey(); } else { s_random = new RNGCryptoServiceProvider(); algorithm = Rijndael.Create(); byte[] encryptionKey = new byte[16]; s_random.GetBytes(encryptionKey); algorithm.Key = encryptionKey; } s_symmetricAlgorithm = algorithm; } } } if (m_encryptionIV == null) { if (s_useTripleDES) { s_symmetricAlgorithm.GenerateIV(); byte[] tempIV = s_symmetricAlgorithm.IV; Interlocked.CompareExchange(ref m_encryptionIV, tempIV, null); } else{ byte[] tmp = new byte[16]; s_random.GetBytes(tmp); Interlocked.CompareExchange(ref m_encryptionIV, tmp, null); } } } #endif // !FEATURE_PAL } ////// Initializes a new instance of the ////// class with name and password set as specified. /// /// public string UserName { get { InitializePart1(); m_environmentUserNamePermission.Demand(); return InternalGetUserName(); } set { #if FEATURE_PAL m_userName = value; // GlobalLog.Print("NetworkCredential::set_UserName: m_userName: \"" + m_userName + "\"" ); #else //!FEATURE_PAL m_userName = Encrypt(value); // GlobalLog.Print("NetworkCredential::set_UserName: value = " + value); // GlobalLog.Print("NetworkCredential::set_UserName: m_userName:"); // GlobalLog.Dump(m_userName); #endif //!FEATURE_PAL } } ////// The user name associated with this credential. /// ////// public string Password { get { ExceptionHelper.UnmanagedPermission.Demand(); return InternalGetPassword(); } set { #if FEATURE_PAL m_password = value; // GlobalLog.Print("NetworkCredential::set_Password: m_password: \"" + m_password + "\"" ); #else //!FEATURE_PAL m_password = Encrypt(value); // GlobalLog.Print("NetworkCredential::set_Password: value = " + value); // GlobalLog.Print("NetworkCredential::set_Password: m_password:"); // GlobalLog.Dump(m_password); #endif //!FEATURE_PAL } } ////// The password for the user name. /// ////// public string Domain { get { InitializePart1(); m_environmentDomainNamePermission.Demand(); return InternalGetDomain(); } set { #if FEATURE_PAL m_domain = value; // GlobalLog.Print("NetworkCredential::set_Domain: m_domain: \"" + m_domain + "\"" ); #else //!FEATURE_PAL m_domain = Encrypt(value); // GlobalLog.Print("NetworkCredential::set_Domain: value = " + value); // GlobalLog.Print("NetworkCredential::set_Domain: m_domain:"); // GlobalLog.Dump(m_domain); #endif //!FEATURE_PAL } } internal string InternalGetUserName() { #if FEATURE_PAL // GlobalLog.Print("NetworkCredential::get_UserName: returning \"" + m_userName + "\""); return m_userName; #else //!FEATURE_PAL string decryptedString = Decrypt(m_userName); // GlobalLog.Print("NetworkCredential::get_UserName: returning \"" + decryptedString + "\""); return decryptedString; #endif //!FEATURE_PAL } internal string InternalGetPassword() { #if FEATURE_PAL // GlobalLog.Print("NetworkCredential::get_Password: returning \"" + m_password + "\""); return m_password; #else //!FEATURE_PAL string decryptedString = Decrypt(m_password); // GlobalLog.Print("NetworkCredential::get_Password: returning \"" + decryptedString + "\""); return decryptedString; #endif //!FEATURE_PAL } internal string InternalGetDomain() { #if FEATURE_PAL // GlobalLog.Print("NetworkCredential::get_Domain: returning \"" + m_domain + "\""); return m_domain; #else //!FEATURE_PAL string decryptedString = Decrypt(m_domain); // GlobalLog.Print("NetworkCredential::get_Domain: returning \"" + decryptedString + "\""); return decryptedString; #endif //!FEATURE_PAL } internal string InternalGetDomainUserName() { string domainUserName = InternalGetDomain(); if (domainUserName.Length != 0) domainUserName += "\\"; domainUserName += InternalGetUserName(); return domainUserName; } ////// The machine name that verifies /// the credentials. Usually this is the host machine. /// ////// public NetworkCredential GetCredential(Uri uri, String authType) { return this; } public NetworkCredential GetCredential(string host, int port, String authenticationType) { return this; } internal bool IsEqualTo(object compObject) { if ((object)compObject == null) return false; if ((object)this == (object)compObject) return true; NetworkCredential compCred = compObject as NetworkCredential; if ((object)compCred == null) return false; return(InternalGetUserName() == compCred.InternalGetUserName() && InternalGetPassword() == compCred.InternalGetPassword() && InternalGetDomain() == compCred.InternalGetDomain()); } #if !FEATURE_PAL internal string Decrypt(byte[] ciphertext) { if (ciphertext == null) { return String.Empty; } if (!m_encrypt) return Encoding.UTF8.GetString(ciphertext); InitializePart2(); MemoryStream ms = new MemoryStream(); CryptoStream cs = new CryptoStream(ms, s_symmetricAlgorithm.CreateDecryptor(s_symmetricAlgorithm.Key, m_encryptionIV), CryptoStreamMode.Write); cs.Write(ciphertext, 0, ciphertext.Length); cs.FlushFinalBlock(); byte[] decryptedBytes = ms.ToArray(); cs.Close(); return Encoding.UTF8.GetString(decryptedBytes); } internal byte[] Encrypt(string text) { if ((text == null) || (text.Length == 0)) { return null; } if (!m_encrypt) return Encoding.UTF8.GetBytes(text); InitializePart2(); MemoryStream ms = new MemoryStream(); CryptoStream cs = new CryptoStream(ms, s_symmetricAlgorithm.CreateEncryptor(s_symmetricAlgorithm.Key, m_encryptionIV), CryptoStreamMode.Write); byte[] stringBytes = Encoding.UTF8.GetBytes(text); cs.Write(stringBytes, 0, stringBytes.Length); cs.FlushFinalBlock(); stringBytes = ms.ToArray(); cs.Close(); return stringBytes; } [RegistryPermission(SecurityAction.Assert, Read="HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Control\\Lsa")] private bool ReadRegFips() { bool readPolicy = false; bool fipsEnabled = false; if (ComNetOS.IsVista) { // For Vista and later OS - use bcrypt.dll function uint policyReadStatus = UnsafeNclNativeMethods.BCryptGetFipsAlgorithmMode(out fipsEnabled); // Status other than SUCCESS or NOT_FOUND means policy store (registry) could not be accessed // fipsEnabled is output as false when NOT_FOUND readPolicy = policyReadStatus == UnsafeNclNativeMethods.NTStatus.STATUS_SUCCESS || policyReadStatus == UnsafeNclNativeMethods.NTStatus.STATUS_OBJECT_NAME_NOT_FOUND; } else { // Not Vista or later OS - read legacy registry value RegistryKey key = null; object value = null; try { string subKey = "SYSTEM\\CurrentControlSet\\Control\\Lsa"; key = Registry.LocalMachine.OpenSubKey(subKey); if (null != key) { value = key.GetValue("fipsalgorithmpolicy"); } readPolicy = true; if (value != null && (int) value == 1) { fipsEnabled = true; } } catch { // consume exceptions and just leave readPolicy == false } finally{ // close reg key if (null != key) { key.Close(); } } } // Default to true if registry couldn't be accessed if (!readPolicy || fipsEnabled) { return true; } else { return false; } } #endif //!FEATURE_PAL } // class NetworkCredential } // namespace System.Net/// Returns an instance of the NetworkCredential class for a Uri and /// authentication type. /// ///
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