SecUtil.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / xsp / System / Web / Util / SecUtil.cs / 1305376 / SecUtil.cs
                        
                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

/* 
 * SecurityUtil class 
 *
 * Copyright (c) 1999 Microsoft Corporation 
 */

namespace System.Web.Util {
    using System.Globalization; 
    using System.Web.Hosting;
    using System.Collections; 
    using System.Collections.Specialized; 
    using System.Data;
    using System.Data.SqlClient; 
    using System.Data.SqlTypes;
    using System.Configuration.Provider;
    using System.Configuration;
    using System.Text.RegularExpressions; 
    using System.Web.DataAccess;
 
    internal static class SecUtility { 

        internal static string GetDefaultAppName() { 
            try {
                string appName = HostingEnvironment.ApplicationVirtualPath;
                if (String.IsNullOrEmpty(appName)) {
#if !FEATURE_PAL 
                    // ROTORTODO: enable Process.MainModule or support an alternative
                    // naming scheme for (HttpRuntime.AppDomainAppVirtualPath == null) 
 
                    appName = System.Diagnostics.Process.GetCurrentProcess().
                                     MainModule.ModuleName; 

                    int indexOfDot = appName.IndexOf('.');
                    if (indexOfDot != -1) {
                        appName = appName.Remove(indexOfDot); 
                    }
#endif // !FEATURE_PAL 
                } 

                if (String.IsNullOrEmpty(appName)) { 
                    return "/";
                }
                else {
                    return appName; 
                }
            } 
            catch { 
                return "/";
            } 
        }

        internal static string GetConnectionString(NameValueCollection config) {
            Debug.Assert(config != null); 

            string connectionString = config["connectionString"]; 
            if (!String.IsNullOrEmpty(connectionString)) { 
                return connectionString;
            } 
            else {
                string connectionStringName = config["connectionStringName"];
                if (String.IsNullOrEmpty(connectionStringName))
                    throw new ProviderException(SR.GetString(SR.Connection_name_not_specified)); 

                connectionString = SqlConnectionHelper.GetConnectionString(connectionStringName, lookupConnectionString: true, appLevel: true); 
                if (String.IsNullOrEmpty(connectionString)) { 
                    throw new ProviderException(SR.GetString(SR.Connection_string_not_found, connectionStringName));
                } 
                else {
                    return connectionString;
                }
            } 
        }
 
        // We don't trim the param before checking with password parameters 
        internal static bool ValidatePasswordParameter(ref string param, int maxSize) {
            if (param == null) { 
                return false;
            }

            if (param.Length < 1) { 
                return false;
            } 
 
            if (maxSize > 0 && (param.Length > maxSize) ) {
                return false; 
            }

            return true;
        } 

        internal static bool ValidateParameter(ref string param, bool checkForNull, bool checkIfEmpty, bool checkForCommas, int maxSize) { 
            if (param == null) { 
                return !checkForNull;
            } 

            param = param.Trim();
            if ((checkIfEmpty && param.Length < 1) ||
                 (maxSize > 0 && param.Length > maxSize) || 
                 (checkForCommas && param.Contains(","))) {
                return false; 
            } 

            return true; 
        }

        // We don't trim the param before checking with password parameters
        internal static void CheckPasswordParameter(ref string param, int maxSize, string paramName) { 
            if (param == null) {
                throw new ArgumentNullException(paramName); 
            } 

            if (param.Length < 1) { 
                throw new ArgumentException(SR.GetString(SR.Parameter_can_not_be_empty, paramName), paramName);
            }

            if (maxSize > 0 && param.Length > maxSize) { 
                throw new ArgumentException(SR.GetString(SR.Parameter_too_long, paramName, maxSize.ToString(CultureInfo.InvariantCulture)), paramName);
            } 
        } 

        internal static void CheckParameter(ref string param, bool checkForNull, bool checkIfEmpty, bool checkForCommas, int maxSize, string paramName) { 
            if (param == null) {
                if (checkForNull) {
                    throw new ArgumentNullException(paramName);
                } 

                return; 
            } 

            param = param.Trim(); 
            if (checkIfEmpty && param.Length < 1) {
                throw new ArgumentException(SR.GetString(SR.Parameter_can_not_be_empty, paramName), paramName);
            }
 
            if (maxSize > 0 && param.Length > maxSize) {
                throw new ArgumentException(SR.GetString(SR.Parameter_too_long, paramName, maxSize.ToString(CultureInfo.InvariantCulture)), paramName); 
            } 

            if (checkForCommas && param.Contains(",")) { 
                throw new ArgumentException(SR.GetString(SR.Parameter_can_not_contain_comma, paramName), paramName);
            }
        }
 
        internal static void CheckArrayParameter(ref string[] param, bool checkForNull, bool checkIfEmpty, bool checkForCommas, int maxSize, string paramName) {
            if (param == null) { 
                throw new ArgumentNullException(paramName); 
            }
 
            if (param.Length < 1) {
                throw new ArgumentException(SR.GetString(SR.Parameter_array_empty, paramName), paramName);
            }
 
            Hashtable values = new Hashtable(param.Length);
            for (int i = param.Length - 1; i >= 0; i--) { 
                SecUtility.CheckParameter(ref param[i], checkForNull, checkIfEmpty, checkForCommas, maxSize, 
                    paramName + "[ " + i.ToString(CultureInfo.InvariantCulture) + " ]");
                if (values.Contains(param[i])) { 
                    throw new ArgumentException(SR.GetString(SR.Parameter_duplicate_array_element, paramName), paramName);
                }
                else {
                    values.Add(param[i], param[i]); 
                }
            } 
        } 

        internal static bool GetBooleanValue(NameValueCollection config, string valueName, bool defaultValue) { 
            string sValue = config[valueName];
            if (sValue == null) {
                return defaultValue;
            } 

            bool result; 
            if (bool.TryParse(sValue, out result)) { 
                return result;
            } 
            else {
                throw new ProviderException(SR.GetString(SR.Value_must_be_boolean, valueName));
            }
        } 

        internal static int GetIntValue(NameValueCollection config, string valueName, int defaultValue, bool zeroAllowed, int maxValueAllowed) { 
            string sValue = config[valueName]; 

            if (sValue == null) { 
                return defaultValue;
            }

            int iValue; 
            if (!Int32.TryParse(sValue, out iValue)) {
                if (zeroAllowed) { 
                    throw new ProviderException(SR.GetString(SR.Value_must_be_non_negative_integer, valueName)); 
                }
 
                throw new ProviderException(SR.GetString(SR.Value_must_be_positive_integer, valueName));
            }

            if (zeroAllowed && iValue < 0) { 
                throw new ProviderException(SR.GetString(SR.Value_must_be_non_negative_integer, valueName));
            } 
 
            if (!zeroAllowed && iValue <= 0) {
                throw new ProviderException(SR.GetString(SR.Value_must_be_positive_integer, valueName)); 
            }

            if (maxValueAllowed > 0 && iValue > maxValueAllowed) {
                throw new ProviderException(SR.GetString(SR.Value_too_big, valueName, maxValueAllowed.ToString(CultureInfo.InvariantCulture))); 
            }
 
            return iValue; 
        }
 
#if !FEATURE_PAL //
        internal static void CheckSchemaVersion(ProviderBase provider, SqlConnection connection, string[] features, string version, ref int schemaVersionCheck) {
            if (connection == null) {
                throw new ArgumentNullException("connection"); 
            }
 
            if (features == null) { 
                throw new ArgumentNullException("features");
            } 

            if (version == null) {
                throw new ArgumentNullException("version");
            } 

            if (schemaVersionCheck == -1) { 
                throw new ProviderException(SR.GetString(SR.Provider_Schema_Version_Not_Match, provider.ToString(), version)); 
            }
            else if (schemaVersionCheck == 0) { 
                lock (provider) {
                    if (schemaVersionCheck == -1) {
                        throw new ProviderException(SR.GetString(SR.Provider_Schema_Version_Not_Match, provider.ToString(), version));
                    } 
                    else if (schemaVersionCheck == 0) {
                        int iStatus = 0; 
                        SqlCommand cmd = null; 
                        SqlParameter p = null;
 
                        foreach (string feature in features) {
                            cmd = new SqlCommand("dbo.aspnet_CheckSchemaVersion", connection);

                            cmd.CommandType = CommandType.StoredProcedure; 

                            p = new SqlParameter("@Feature", feature); 
                            cmd.Parameters.Add(p); 

                            p = new SqlParameter("@CompatibleSchemaVersion", version); 
                            cmd.Parameters.Add(p);

                            p = new SqlParameter("@ReturnValue", SqlDbType.Int);
                            p.Direction = ParameterDirection.ReturnValue; 
                            cmd.Parameters.Add(p);
 
                            cmd.ExecuteNonQuery(); 

                            iStatus = ((p.Value != null) ? ((int)p.Value) : -1); 
                            if (iStatus != 0) {
                                schemaVersionCheck = -1;

                                throw new ProviderException(SR.GetString(SR.Provider_Schema_Version_Not_Match, provider.ToString(), version)); 
                            }
                        } 
 
                        schemaVersionCheck = 1;
                    } 
                }
            }
        }
#endif // !FEATURE_PAL 
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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SecUtil.cs source code in C# .NET

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