Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / clr / src / BCL / System / Security / Util / sitestring.cs / 1 / sitestring.cs
// ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== // SiteString // namespace System.Security.Util { using System; using System.Collections; using System.Globalization; [Serializable] internal class SiteString { protected String m_site; protected ArrayList m_separatedSite; protected static char[] m_separators = { '.' }; protected internal SiteString() { // Only call this in derived classes when you know what you're doing. } public SiteString( String site ) { m_separatedSite = CreateSeparatedSite( site ); m_site = site; } private SiteString( String site, ArrayList separatedSite ) { m_separatedSite = separatedSite; m_site = site; } private static ArrayList CreateSeparatedSite( String site ) { ArrayList list = new ArrayList(); if (site == null || site.Length == 0) { throw new ArgumentException( Environment.GetResourceString("Argument_InvalidSite" )); } int braIndex = -1; int ketIndex = -1; braIndex = site.IndexOf('['); if (braIndex == 0) ketIndex = site.IndexOf(']', braIndex+1); if (ketIndex != -1) { // Found an IPv6 address. Special case that String ipv6Addr = site.Substring(braIndex+1, ketIndex-braIndex-1); list.Add(ipv6Addr); return list; } // Regular hostnames or IPv4 addresses // We dont need to do this for IPv4 addresses, but it's easier to do it anyway String[] separatedArray = site.Split( m_separators ); for (int index = separatedArray.Length-1; index > -1; --index) { if (separatedArray[index] == null) { throw new ArgumentException( Environment.GetResourceString("Argument_InvalidSite" )); } else if (separatedArray[index].Equals( "" )) { if (index != separatedArray.Length-1) { throw new ArgumentException( Environment.GetResourceString("Argument_InvalidSite" )); } } else if (separatedArray[index].Equals( "*" )) { if (index != 0) { throw new ArgumentException( Environment.GetResourceString("Argument_InvalidSite" )); } list.Add( separatedArray[index] ); } else if (!AllLegalCharacters( separatedArray[index] )) { throw new ArgumentException( Environment.GetResourceString("Argument_InvalidSite" )); } else { list.Add( separatedArray[index] ); } } return list; } // KB# Q188997 - http://support.microsoft.com/default.aspx?scid=KB;EN-US;Q188997& gives the list of allowed characters in // a NETBIOS name. DNS names are a subset of that (alphanumeric or '-'). private static bool AllLegalCharacters( String str ) { for (int i = 0; i < str.Length; ++i) { char c = str[i]; if (IsLegalDNSChar(c) || IsNetbiosSplChar(c)) { continue; } else { return false; } } return true; } private static bool IsLegalDNSChar(char c) { if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9') || (c == '-')) return true; else return false; } private static bool IsNetbiosSplChar(char c) { // ! @ # $ % ^ & ( ) - _ ' { } . ~ are OK switch (c) { case '-': case '_': case '@': case '!': case '#': case '$': case '%': case '^': case '&': case '(': case ')': case '\'': case '{': case '}': case '.': case '~': return true; default: return false; } } public override String ToString() { return m_site; } public override bool Equals(Object o) { if (o == null || !(o is SiteString)) return false; else return this.Equals( (SiteString)o, true ); } public override int GetHashCode() { TextInfo info = CultureInfo.InvariantCulture.TextInfo; return info.GetCaseInsensitiveHashCode( this.m_site ); } internal bool Equals( SiteString ss, bool ignoreCase ) { if (this.m_site == null) return ss.m_site == null; if (ss.m_site == null) return false; return this.IsSubsetOf(ss, ignoreCase) && ss.IsSubsetOf(this, ignoreCase); } public virtual SiteString Copy() { return new SiteString( m_site, m_separatedSite ); } public virtual bool IsSubsetOf( SiteString operand ) { return this.IsSubsetOf( operand, true ); } public virtual bool IsSubsetOf( SiteString operand, bool ignoreCase ) { StringComparison strComp = (ignoreCase? StringComparison.OrdinalIgnoreCase : StringComparison.Ordinal); if (operand == null) { return false; } else if (this.m_separatedSite.Count == operand.m_separatedSite.Count && this.m_separatedSite.Count == 0) { return true; } else if (this.m_separatedSite.Count < operand.m_separatedSite.Count - 1) { return false; } else if (this.m_separatedSite.Count > operand.m_separatedSite.Count && operand.m_separatedSite.Count > 0 && !operand.m_separatedSite[operand.m_separatedSite.Count-1].Equals( "*" )) { return false; } else if (String.Compare( this.m_site, operand.m_site, strComp) == 0) { return true; } for (int index = 0; index < operand.m_separatedSite.Count - 1; ++index) { if (String.Compare( (String)this.m_separatedSite[index], (String)operand.m_separatedSite[index], strComp) != 0 ) { return false; } } if (this.m_separatedSite.Count < operand.m_separatedSite.Count) { return operand.m_separatedSite[operand.m_separatedSite.Count-1].Equals( "*" ); } else if (this.m_separatedSite.Count == operand.m_separatedSite.Count) { // last item must be the same or operand must have a * in its last item return (String.Compare( (String)this.m_separatedSite[this.m_separatedSite.Count-1], (String)operand.m_separatedSite[this.m_separatedSite.Count-1], strComp ) == 0 || operand.m_separatedSite[operand.m_separatedSite.Count-1].Equals( "*" )); } else return true; } public virtual SiteString Intersect( SiteString operand ) { if (operand == null) { return null; } else if (this.IsSubsetOf( operand )) { return this.Copy(); } else if (operand.IsSubsetOf( this )) { return operand.Copy(); } else { return null; } } public virtual SiteString Union( SiteString operand ) { if (operand == null) { return this; } else if (this.IsSubsetOf( operand )) { return operand.Copy(); } else if (operand.IsSubsetOf( this )) { return this.Copy(); } else { return null; } } } }
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