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//------------------------------------------------------------------------------
// <copyright file="DBConnectionOptions.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
// <owner current="true" primary="true">Microsoft</owner>
// <owner current="true" primary="false">Microsoft</owner>
//------------------------------------------------------------------------------
namespace System.Data.Common {
using System;
using System.Collections;
using System.Data;
using System.Diagnostics;
using System.Globalization;
using System.Runtime.Serialization;
using System.Security.Permissions;
using System.Text;
using System.Text.RegularExpressions;
using System.Runtime.Versioning;
internal class DbConnectionOptions {
// instances of this class are intended to be immutable, i.e readonly
// used by pooling classes so it is much easier to verify correctness
// when not worried about the class being modified during execution
#if DEBUG
/*private const string ConnectionStringPatternV1 =
"[\\s;]*"
+"(?<key>([^=\\s]|\\s+[^=\\s]|\\s+==|==)+)"
+ "\\s*=(?!=)\\s*"
+"(?<value>("
+ "(" + "\"" + "([^\"]|\"\")*" + "\"" + ")"
+ "|"
+ "(" + "'" + "([^']|'')*" + "'" + ")"
+ "|"
+ "(" + "(?![\"'])" + "([^\\s;]|\\s+[^\\s;])*" + "(?<![\"'])" + ")"
+ "))"
+ "[\\s;]*"
;*/
private const string ConnectionStringPattern = // may not contain embedded null except trailing last value
"([\\s;]*" // leading whitespace and extra semicolons
+ "(?![\\s;])" // key does not start with space or semicolon
+ "(?<key>([^=\\s\\p{Cc}]|\\s+[^=\\s\\p{Cc}]|\\s+==|==)+)" // allow any visible character for keyname except '=' which must quoted as '=='
+ "\\s*=(?!=)\\s*" // the equal sign divides the key and value parts
+ "(?<value>"
+ "(\"([^\"\u0000]|\"\")*\")" // double quoted string, " must be quoted as ""
+ "|"
+ "('([^'\u0000]|'')*')" // single quoted string, ' must be quoted as ''
+ "|"
+ "((?![\"'\\s])" // unquoted value must not start with " or ' or space, would also like = but too late to change
+ "([^;\\s\\p{Cc}]|\\s+[^;\\s\\p{Cc}])*" // control characters must be quoted
+ "(?<![\"']))" // unquoted value must not stop with " or '
+ ")(\\s*)(;|[\u0000\\s]*$)" // whitespace after value up to semicolon or end-of-line
+ ")*" // repeat the key-value pair
+ "[\\s;]*[\u0000\\s]*" // traling whitespace/semicolons (DataSourceLocator), embedded nulls are allowed only in the end
;
private const string ConnectionStringPatternOdbc = // may not contain embedded null except trailing last value
"([\\s;]*" // leading whitespace and extra semicolons
+ "(?![\\s;])" // key does not start with space or semicolon
+ "(?<key>([^=\\s\\p{Cc}]|\\s+[^=\\s\\p{Cc}])+)" // allow any visible character for keyname except '='
+ "\\s*=\\s*" // the equal sign divides the key and value parts
+ "(?<value>"
+ "(\\{([^\\}\u0000]|\\}\\})*\\})" // quoted string, starts with { and ends with }
+ "|"
+ "((?![\\{\\s])" // unquoted value must not start with { or space, would also like = but too late to change
+ "([^;\\s\\p{Cc}]|\\s+[^;\\s\\p{Cc}])*" // control characters must be quoted
+ ")" // VSTFDEVDIV 94761: although the spec does not allow {}
// embedded within a value, the retail code does.
// + "(?<![\\}]))" // unquoted value must not stop with }
+ ")(\\s*)(;|[\u0000\\s]*$)" // whitespace after value up to semicolon or end-of-line
+ ")*" // repeat the key-value pair
+ "[\\s;]*[\u0000\\s]*" // traling whitespace/semicolons (DataSourceLocator), embedded nulls are allowed only in the end
;
private static readonly Regex ConnectionStringRegex = new Regex(ConnectionStringPattern, RegexOptions.ExplicitCapture | RegexOptions.Compiled);
private static readonly Regex ConnectionStringRegexOdbc = new Regex(ConnectionStringPatternOdbc, RegexOptions.ExplicitCapture | RegexOptions.Compiled);
#endif
private const string ConnectionStringValidKeyPattern = "^(?![;\\s])[^\\p{Cc}]+(?<!\\s)$"; // key not allowed to start with semi-colon or space or contain non-visible characters or end with space
private const string ConnectionStringValidValuePattern = "^[^\u0000]*$"; // value not allowed to contain embedded null
private const string ConnectionStringQuoteValuePattern = "^[^\"'=;\\s\\p{Cc}]*$"; // generally do not quote the value if it matches the pattern
private const string ConnectionStringQuoteOdbcValuePattern = "^\\{([^\\}\u0000]|\\}\\})*\\}$"; // do not quote odbc value if it matches this pattern
internal const string DataDirectory = "|datadirectory|";
private static readonly Regex ConnectionStringValidKeyRegex = new Regex(ConnectionStringValidKeyPattern, RegexOptions.Compiled);
private static readonly Regex ConnectionStringValidValueRegex = new Regex(ConnectionStringValidValuePattern, RegexOptions.Compiled);
private static readonly Regex ConnectionStringQuoteValueRegex = new Regex(ConnectionStringQuoteValuePattern, RegexOptions.Compiled);
private static readonly Regex ConnectionStringQuoteOdbcValueRegex = new Regex(ConnectionStringQuoteOdbcValuePattern, RegexOptions.ExplicitCapture | RegexOptions.Compiled);
// connection string common keywords
private static class KEY {
internal const string Integrated_Security = "integrated security";
internal const string Password = "password";
internal const string Persist_Security_Info = "persist security info";
internal const string User_ID = "user id";
};
// known connection string common synonyms
private static class SYNONYM {
internal const string Pwd = "pwd";
internal const string UID = "uid";
};
private readonly string _usersConnectionString;
private readonly Hashtable _parsetable;
internal readonly NameValuePair KeyChain;
internal readonly bool HasPasswordKeyword;
internal readonly bool HasUserIdKeyword;
// differences between OleDb and Odbc
// ODBC:
// http://msdn.microsoft.com/library/default.asp?url=/library/en-us/odbc/htm/odbcsqldriverconnect.asp
// http://msdn.microsoft.com/library/default.asp?url=/library/en-us/odbcsql/od_odbc_d_4x4k.asp
// do not support == -> = in keywords
// first key-value pair wins
// quote values using \{ and \}, only driver= and pwd= appear to generically allow quoting
// do not strip quotes from value, or add quotes except for driver keyword
// OLEDB:
// http://msdn.microsoft.com/library/default.asp?url=/library/en-us/oledb/htm/oledbconnectionstringsyntax.asp
// support == -> = in keywords
// last key-value pair wins
// quote values using \" or \'
// strip quotes from value
internal readonly bool UseOdbcRules;
private System.Security.PermissionSet _permissionset;
// called by derived classes that may cache based on connectionString
public DbConnectionOptions(string connectionString)
: this(connectionString, null, false) {
}
// synonyms hashtable is meant to be read-only translation of parsed string
// keywords/synonyms to a known keyword string
public DbConnectionOptions(string connectionString, Hashtable synonyms, bool useOdbcRules) {
UseOdbcRules = useOdbcRules;
_parsetable = new Hashtable();
_usersConnectionString = ((null != connectionString) ? connectionString : "");
// first pass on parsing, initial syntax check
if (0 < _usersConnectionString.Length) {
KeyChain = ParseInternal(_parsetable, _usersConnectionString, true, synonyms, UseOdbcRules);
HasPasswordKeyword = (_parsetable.ContainsKey(KEY.Password) || _parsetable.ContainsKey(SYNONYM.Pwd));
HasUserIdKeyword = (_parsetable.ContainsKey(KEY.User_ID) || _parsetable.ContainsKey(SYNONYM.UID));
}
}
protected DbConnectionOptions(DbConnectionOptions connectionOptions) { // Clone used by SqlConnectionString
_usersConnectionString = connectionOptions._usersConnectionString;
HasPasswordKeyword = connectionOptions.HasPasswordKeyword;
HasUserIdKeyword = connectionOptions.HasUserIdKeyword;
UseOdbcRules = connectionOptions.UseOdbcRules;
_parsetable = connectionOptions._parsetable;
KeyChain = connectionOptions.KeyChain;
}
public string UsersConnectionString(bool hidePassword) {
return UsersConnectionString(hidePassword, false);
}
private string UsersConnectionString(bool hidePassword, bool forceHidePassword) {
string connectionString = _usersConnectionString;
if (HasPasswordKeyword && (forceHidePassword || (hidePassword && !HasPersistablePassword))) {
ReplacePasswordPwd(out connectionString, false);
}
return ((null != connectionString) ? connectionString : "");
}
internal string UsersConnectionStringForTrace() {
return UsersConnectionString(true, true);
}
internal bool HasBlankPassword {
get {
if (!ConvertValueToIntegratedSecurity()) {
if (_parsetable.ContainsKey(KEY.Password)) {
return ADP.IsEmpty((string)_parsetable[KEY.Password]);
} else
if (_parsetable.ContainsKey(SYNONYM.Pwd)) {
return ADP.IsEmpty((string)_parsetable[SYNONYM.Pwd]); // MDAC 83097
} else {
return ((_parsetable.ContainsKey(KEY.User_ID) && !ADP.IsEmpty((string)_parsetable[KEY.User_ID])) || (_parsetable.ContainsKey(SYNONYM.UID) && !ADP.IsEmpty((string)_parsetable[SYNONYM.UID])));
}
}
return false;
}
}
internal bool HasPersistablePassword {
get {
if (HasPasswordKeyword) {
return ConvertValueToBoolean(KEY.Persist_Security_Info, false);
}
return true; // no password means persistable password so we don't have to munge
}
}
public bool IsEmpty {
get { return (null == KeyChain); }
}
internal Hashtable Parsetable {
get { return _parsetable; }
}
public ICollection Keys {
get { return _parsetable.Keys; }
}
public string this[string keyword] {
get { return (string)_parsetable[keyword]; }
}
internal static void AppendKeyValuePairBuilder(StringBuilder builder, string keyName, string keyValue, bool useOdbcRules) {
ADP.CheckArgumentNull(builder, "builder");
ADP.CheckArgumentLength(keyName, "keyName");
if ((null == keyName) || !ConnectionStringValidKeyRegex.IsMatch(keyName)) {
throw ADP.InvalidKeyname(keyName);
}
if ((null != keyValue) && !IsValueValidInternal(keyValue)) {
throw ADP.InvalidValue(keyName);
}
if ((0 < builder.Length) && (';' != builder[builder.Length-1])) {
builder.Append(";");
}
if (useOdbcRules) {
builder.Append(keyName);
}
else {
builder.Append(keyName.Replace("=", "=="));
}
builder.Append("=");
if (null != keyValue) { // else <keyword>=;
if (useOdbcRules) {
if ((0 < keyValue.Length) &&
(('{' == keyValue[0]) || (0 <= keyValue.IndexOf(';')) || (0 == String.Compare(DbConnectionStringKeywords.Driver, keyName, StringComparison.OrdinalIgnoreCase))) &&
!ConnectionStringQuoteOdbcValueRegex.IsMatch(keyValue))
{
// always quote Driver value (required for ODBC Version 2.65 and earlier)
// always quote values that contain a ';'
builder.Append('{').Append(keyValue.Replace("}", "}}")).Append('}');
}
else {
builder.Append(keyValue);
}
}
else if (ConnectionStringQuoteValueRegex.IsMatch(keyValue)) {
// <value> -> <value>
builder.Append(keyValue);
}
else if ((-1 != keyValue.IndexOf('\"')) && (-1 == keyValue.IndexOf('\''))) {
// <val"ue> -> <'val"ue'>
builder.Append('\'');
builder.Append(keyValue);
builder.Append('\'');
}
else {
// <val'ue> -> <"val'ue">
// <=value> -> <"=value">
// <;value> -> <";value">
// < value> -> <" value">
// <va lue> -> <"va lue">
// <va'"lue> -> <"va'""lue">
builder.Append('\"');
builder.Append(keyValue.Replace("\"", "\"\""));
builder.Append('\"');
}
}
}
public bool ConvertValueToBoolean(string keyName, bool defaultValue) {
object value = _parsetable[keyName];
if (null == value) {
return defaultValue;
}
return ConvertValueToBooleanInternal(keyName, (string) value);
}
internal static bool ConvertValueToBooleanInternal(string keyName, string stringValue) {
if (CompareInsensitiveInvariant(stringValue, "true") || CompareInsensitiveInvariant(stringValue, "yes"))
return true;
else if (CompareInsensitiveInvariant(stringValue, "false") || CompareInsensitiveInvariant(stringValue, "no"))
return false;
else {
string tmp = stringValue.Trim(); // Remove leading & trailing white space.
if (CompareInsensitiveInvariant(tmp, "true") || CompareInsensitiveInvariant(tmp, "yes"))
return true;
else if (CompareInsensitiveInvariant(tmp, "false") || CompareInsensitiveInvariant(tmp, "no"))
return false;
else {
throw ADP.InvalidConnectionOptionValue(keyName);
}
}
}
// same as Boolean, but with SSPI thrown in as valid yes
public bool ConvertValueToIntegratedSecurity() {
object value = _parsetable[KEY.Integrated_Security];
if (null == value) {
return false;
}
return ConvertValueToIntegratedSecurityInternal((string) value);
}
internal bool ConvertValueToIntegratedSecurityInternal(string stringValue) {
if (CompareInsensitiveInvariant(stringValue, "sspi") || CompareInsensitiveInvariant(stringValue, "true") || CompareInsensitiveInvariant(stringValue, "yes"))
return true;
else if (CompareInsensitiveInvariant(stringValue, "false") || CompareInsensitiveInvariant(stringValue, "no"))
return false;
else {
string tmp = stringValue.Trim(); // Remove leading & trailing white space.
if (CompareInsensitiveInvariant(tmp, "sspi") || CompareInsensitiveInvariant(tmp, "true") || CompareInsensitiveInvariant(tmp, "yes"))
return true;
else if (CompareInsensitiveInvariant(tmp, "false") || CompareInsensitiveInvariant(tmp, "no"))
return false;
else {
throw ADP.InvalidConnectionOptionValue(KEY.Integrated_Security);
}
}
}
public int ConvertValueToInt32(string keyName, int defaultValue) {
object value = _parsetable[keyName];
if (null == value) {
return defaultValue;
}
return ConvertToInt32Internal(keyName, (string) value);
}
internal static int ConvertToInt32Internal(string keyname, string stringValue) {
try {
return System.Int32.Parse(stringValue, System.Globalization.NumberStyles.Integer, CultureInfo.InvariantCulture);
}
catch (FormatException e) {
throw ADP.InvalidConnectionOptionValue(keyname, e);
}
catch (OverflowException e) {
throw ADP.InvalidConnectionOptionValue(keyname, e);
}
}
public string ConvertValueToString(string keyName, string defaultValue) {
string value = (string)_parsetable[keyName];
return ((null != value) ? value : defaultValue);
}
static private bool CompareInsensitiveInvariant(string strvalue, string strconst) {
return (0 == StringComparer.OrdinalIgnoreCase.Compare(strvalue, strconst));
}
public bool ContainsKey(string keyword) {
return _parsetable.ContainsKey(keyword);
}
protected internal virtual System.Security.PermissionSet CreatePermissionSet() {
return null;
}
internal void DemandPermission() {
if (null == _permissionset) {
_permissionset = CreatePermissionSet();
}
_permissionset.Demand();
}
protected internal virtual string Expand() {
return _usersConnectionString;
}
// SxS notes:
// * this method queries "DataDirectory" value from the current AppDomain.
// This string is used for to replace "!DataDirectory!" values in the connection string, it is not considered as an "exposed resource".
// * This method uses GetFullPath to validate that root path is valid, the result is not exposed out.
[ResourceExposure(ResourceScope.None)]
[ResourceConsumption(ResourceScope.Machine, ResourceScope.Machine)]
internal static string ExpandDataDirectory(string keyword, string value, ref string datadir) {
string fullPath = null;
if ((null != value) && value.StartsWith(DataDirectory, StringComparison.OrdinalIgnoreCase)) {
string rootFolderPath = datadir;
if (null == rootFolderPath) {
// find the replacement path
object rootFolderObject = AppDomain.CurrentDomain.GetData("DataDirectory");
rootFolderPath = (rootFolderObject as string);
if ((null != rootFolderObject) && (null == rootFolderPath)) {
throw ADP.InvalidDataDirectory();
}
else if (ADP.IsEmpty(rootFolderPath)) {
rootFolderPath = AppDomain.CurrentDomain.BaseDirectory;
}
if (null == rootFolderPath) {
rootFolderPath = "";
}
// cache the |DataDir| for ExpandDataDirectories
datadir = rootFolderPath;
}
// We don't know if rootFolderpath ends with '\', and we don't know if the given name starts with onw
int fileNamePosition = DataDirectory.Length; // filename starts right after the '|datadirectory|' keyword
bool rootFolderEndsWith = (0 < rootFolderPath.Length) && rootFolderPath[rootFolderPath.Length-1] == '\\';
bool fileNameStartsWith = (fileNamePosition < value.Length) && value[fileNamePosition] == '\\';
// replace |datadirectory| with root folder path
if (!rootFolderEndsWith && !fileNameStartsWith) {
// need to insert '\'
fullPath = rootFolderPath + '\\' + value.Substring(fileNamePosition);
}
else if (rootFolderEndsWith && fileNameStartsWith) {
// need to strip one out
fullPath = rootFolderPath + value.Substring(fileNamePosition+1);
}
else {
// simply concatenate the strings
fullPath = rootFolderPath + value.Substring(fileNamePosition);
}
// verify root folder path is a real path without unexpected "..\"
if (!ADP.GetFullPath(fullPath).StartsWith(rootFolderPath, StringComparison.Ordinal)) {
throw ADP.InvalidConnectionOptionValue(keyword);
}
}
return fullPath;
}
internal string ExpandDataDirectories(ref string filename, ref int position) {
string value = null;
StringBuilder builder = new StringBuilder(_usersConnectionString.Length);
string datadir = null;
int copyPosition = 0;
bool expanded = false;
for(NameValuePair current = KeyChain; null != current; current = current.Next) {
value = current.Value;
// remove duplicate keyswords from connectionstring
//if ((object)this[current.Name] != (object)value) {
// expanded = true;
// copyPosition += current.Length;
// continue;
//}
// There is a set of keywords we explictly do NOT want to expand |DataDirectory| on
if (UseOdbcRules) {
switch(current.Name) {
case DbConnectionOptionKeywords.Driver:
case DbConnectionOptionKeywords.Pwd:
case DbConnectionOptionKeywords.UID:
break;
default:
value = ExpandDataDirectory(current.Name, value, ref datadir);
break;
}
}
else {
switch(current.Name) {
case DbConnectionOptionKeywords.Provider:
case DbConnectionOptionKeywords.DataProvider:
case DbConnectionOptionKeywords.RemoteProvider:
case DbConnectionOptionKeywords.ExtendedProperties:
case DbConnectionOptionKeywords.UserID:
case DbConnectionOptionKeywords.Password:
case DbConnectionOptionKeywords.UID:
case DbConnectionOptionKeywords.Pwd:
break;
default:
value = ExpandDataDirectory(current.Name, value, ref datadir);
break;
}
}
if (null == value) {
value = current.Value;
}
if (UseOdbcRules || (DbConnectionOptionKeywords.FileName != current.Name)) {
if (value != current.Value) {
expanded = true;
AppendKeyValuePairBuilder(builder, current.Name, value, UseOdbcRules);
builder.Append(';');
}
else {
builder.Append(_usersConnectionString, copyPosition, current.Length);
}
}
else {
// strip out 'File Name=myconnection.udl' for OleDb
// remembering is value for which UDL file to open
// and where to insert the strnig
expanded = true;
filename = value;
position = builder.Length;
}
copyPosition += current.Length;
}
if (expanded) {
value = builder.ToString();
}
else {
value = null;
}
return value;
}
internal string ExpandKeyword(string keyword, string replacementValue) {
// preserve duplicates, updated keyword value with replacement value
// if keyword not specified, append to end of the string
bool expanded = false;
int copyPosition = 0;
StringBuilder builder = new StringBuilder(_usersConnectionString.Length);
for(NameValuePair current = KeyChain; null != current; current = current.Next) {
if ((current.Name == keyword) && (current.Value == this[keyword])) {
// only replace the parse end-result value instead of all values
// so that when duplicate-keywords occur other original values remain in place
AppendKeyValuePairBuilder(builder, current.Name, replacementValue, UseOdbcRules);
builder.Append(';');
expanded = true;
}
else {
builder.Append(_usersConnectionString, copyPosition, current.Length);
}
copyPosition += current.Length;
}
if (!expanded) {
//
Debug.Assert(!UseOdbcRules, "ExpandKeyword not ready for Odbc");
AppendKeyValuePairBuilder(builder, keyword, replacementValue, UseOdbcRules);
}
return builder.ToString();
}
#if DEBUG
[System.Diagnostics.Conditional("DEBUG")]
private static void DebugTraceKeyValuePair(string keyname, string keyvalue, Hashtable synonyms) {
if (Bid.AdvancedOn) {
Debug.Assert(keyname == keyname.ToLower(CultureInfo.InvariantCulture), "missing ToLower");
string realkeyname = ((null != synonyms) ? (string)synonyms[keyname] : keyname);
if ((KEY.Password != realkeyname) && (SYNONYM.Pwd != realkeyname)) { // don't trace passwords ever!
if (null != keyvalue) {
Bid.Trace("<comm.DbConnectionOptions|INFO|ADV> KeyName='%ls', KeyValue='%ls'\n", keyname, keyvalue);
}
else {
Bid.Trace("<comm.DbConnectionOptions|INFO|ADV> KeyName='%ls'\n", keyname);
}
}
}
}
#endif
static private string GetKeyName(StringBuilder buffer) {
int count = buffer.Length;
while ((0 < count) && Char.IsWhiteSpace(buffer[count-1])) {
count--; // trailing whitespace
}
return buffer.ToString(0, count).ToLower(CultureInfo.InvariantCulture);
}
static private string GetKeyValue(StringBuilder buffer, bool trimWhitespace) {
int count = buffer.Length;
int index = 0;
if (trimWhitespace) {
while ((index < count) && Char.IsWhiteSpace(buffer[index])) {
index++; // leading whitespace
}
while ((0 < count) && Char.IsWhiteSpace(buffer[count-1])) {
count--; // trailing whitespace
}
}
return buffer.ToString(index, count - index);
}
// transistion states used for parsing
private enum ParserState {
NothingYet=1, //start point
Key,
KeyEqual,
KeyEnd,
UnquotedValue,
DoubleQuoteValue,
DoubleQuoteValueQuote,
SingleQuoteValue,
SingleQuoteValueQuote,
BraceQuoteValue,
BraceQuoteValueQuote,
QuotedValueEnd,
NullTermination,
};
static internal int GetKeyValuePair(string connectionString, int currentPosition, StringBuilder buffer, bool useOdbcRules, out string keyname, out string keyvalue) {
int startposition = currentPosition;
buffer.Length = 0;
keyname = null;
keyvalue = null;
char currentChar = '\0';
ParserState parserState = ParserState.NothingYet;
int length = connectionString.Length;
for (; currentPosition < length; ++currentPosition) {
currentChar = connectionString[currentPosition];
switch(parserState) {
case ParserState.NothingYet: // [\\s;]*
if ((';' == currentChar) || Char.IsWhiteSpace(currentChar)) {
continue;
}
if ('\0' == currentChar) { parserState = ParserState.NullTermination; continue; } // MDAC 83540
if (Char.IsControl(currentChar)) { throw ADP.ConnectionStringSyntax(startposition); }
startposition = currentPosition;
if ('=' != currentChar) { // MDAC 86902
parserState = ParserState.Key;
break;
}
else {
parserState = ParserState.KeyEqual;
continue;
}
case ParserState.Key: // (?<key>([^=\\s\\p{Cc}]|\\s+[^=\\s\\p{Cc}]|\\s+==|==)+)
if ('=' == currentChar) { parserState = ParserState.KeyEqual; continue; }
if (Char.IsWhiteSpace(currentChar)) { break; }
if (Char.IsControl(currentChar)) { throw ADP.ConnectionStringSyntax(startposition); }
break;
case ParserState.KeyEqual: // \\s*=(?!=)\\s*
if (!useOdbcRules && '=' == currentChar) { parserState = ParserState.Key; break; }
keyname = GetKeyName(buffer);
if (ADP.IsEmpty(keyname)) { throw ADP.ConnectionStringSyntax(startposition); }
buffer.Length = 0;
parserState = ParserState.KeyEnd;
goto case ParserState.KeyEnd;
case ParserState.KeyEnd:
if (Char.IsWhiteSpace(currentChar)) { continue; }
if (useOdbcRules) {
if ('{' == currentChar) { parserState = ParserState.BraceQuoteValue; break; }
}
else {
if ('\'' == currentChar) { parserState = ParserState.SingleQuoteValue; continue; }
if ('"' == currentChar) { parserState = ParserState.DoubleQuoteValue; continue; }
}
if (';' == currentChar) { goto ParserExit; }
if ('\0' == currentChar) { goto ParserExit; }
if (Char.IsControl(currentChar)) { throw ADP.ConnectionStringSyntax(startposition); }
parserState = ParserState.UnquotedValue;
break;
case ParserState.UnquotedValue: // "((?![\"'\\s])" + "([^;\\s\\p{Cc}]|\\s+[^;\\s\\p{Cc}])*" + "(?<![\"']))"
if (Char.IsWhiteSpace(currentChar)) { break; }
if (Char.IsControl(currentChar) || ';' == currentChar) { goto ParserExit; }
break;
case ParserState.DoubleQuoteValue: // "(\"([^\"\u0000]|\"\")*\")"
if ('"' == currentChar) { parserState = ParserState.DoubleQuoteValueQuote; continue; }
if ('\0' == currentChar) { throw ADP.ConnectionStringSyntax(startposition); }
break;
case ParserState.DoubleQuoteValueQuote:
if ('"' == currentChar) { parserState = ParserState.DoubleQuoteValue; break; }
keyvalue = GetKeyValue(buffer, false);
parserState = ParserState.QuotedValueEnd;
goto case ParserState.QuotedValueEnd;
case ParserState.SingleQuoteValue: // "('([^'\u0000]|'')*')"
if ('\'' == currentChar) { parserState = ParserState.SingleQuoteValueQuote; continue; }
if ('\0' == currentChar) { throw ADP.ConnectionStringSyntax(startposition); }
break;
case ParserState.SingleQuoteValueQuote:
if ('\'' == currentChar) { parserState = ParserState.SingleQuoteValue; break; }
keyvalue = GetKeyValue(buffer, false);
parserState = ParserState.QuotedValueEnd;
goto case ParserState.QuotedValueEnd;
case ParserState.BraceQuoteValue: // "(\\{([^\\}\u0000]|\\}\\})*\\})"
if ('}' == currentChar) { parserState = ParserState.BraceQuoteValueQuote; break; }
if ('\0' == currentChar) { throw ADP.ConnectionStringSyntax(startposition); }
break;
case ParserState.BraceQuoteValueQuote:
if ('}' == currentChar) { parserState = ParserState.BraceQuoteValue; break; }
keyvalue = GetKeyValue(buffer, false);
parserState = ParserState.QuotedValueEnd;
goto case ParserState.QuotedValueEnd;
case ParserState.QuotedValueEnd:
if (Char.IsWhiteSpace(currentChar)) { continue; }
if (';' == currentChar) { goto ParserExit; }
if ('\0' == currentChar) { parserState = ParserState.NullTermination; continue; } // MDAC 83540
throw ADP.ConnectionStringSyntax(startposition); // unbalanced single quote
case ParserState.NullTermination: // [\\s;\u0000]*
if ('\0' == currentChar) { continue; }
if (Char.IsWhiteSpace(currentChar)) { continue; } // MDAC 83540
throw ADP.ConnectionStringSyntax(currentPosition);
default:
throw ADP.InternalError(ADP.InternalErrorCode.InvalidParserState1);
}
buffer.Append(currentChar);
}
ParserExit:
switch (parserState) {
case ParserState.Key:
case ParserState.DoubleQuoteValue:
case ParserState.SingleQuoteValue:
case ParserState.BraceQuoteValue:
// keyword not found/unbalanced double/single quote
throw ADP.ConnectionStringSyntax(startposition);
case ParserState.KeyEqual:
// equal sign at end of line
keyname = GetKeyName(buffer);
if (ADP.IsEmpty(keyname)) { throw ADP.ConnectionStringSyntax(startposition); }
break;
case ParserState.UnquotedValue:
// unquoted value at end of line
keyvalue = GetKeyValue(buffer, true);
char tmpChar = keyvalue[keyvalue.Length - 1];
if (!useOdbcRules && (('\'' == tmpChar) || ('"' == tmpChar))) {
throw ADP.ConnectionStringSyntax(startposition); // unquoted value must not end in quote, except for odbc
}
break;
case ParserState.DoubleQuoteValueQuote:
case ParserState.SingleQuoteValueQuote:
case ParserState.BraceQuoteValueQuote:
case ParserState.QuotedValueEnd:
// quoted value at end of line
keyvalue = GetKeyValue(buffer, false);
break;
case ParserState.NothingYet:
case ParserState.KeyEnd:
case ParserState.NullTermination:
// do nothing
break;
default:
throw ADP.InternalError(ADP.InternalErrorCode.InvalidParserState2);
}
if ((';' == currentChar) && (currentPosition < connectionString.Length)) {
currentPosition++;
}
return currentPosition;
}
static private bool IsValueValidInternal(string keyvalue) {
if (null != keyvalue)
{
#if DEBUG
bool compValue = ConnectionStringValidValueRegex.IsMatch(keyvalue);
Debug.Assert((-1 == keyvalue.IndexOf('\u0000')) == compValue, "IsValueValid mismatch with regex");
#endif
return (-1 == keyvalue.IndexOf('\u0000'));
}
return true;
}
static private bool IsKeyNameValid(string keyname) {
if (null != keyname) {
#if DEBUG
bool compValue = ConnectionStringValidKeyRegex.IsMatch(keyname);
Debug.Assert(((0 < keyname.Length) && (';' != keyname[0]) && !Char.IsWhiteSpace(keyname[0]) && (-1 == keyname.IndexOf('\u0000'))) == compValue, "IsValueValid mismatch with regex");
#endif
return ((0 < keyname.Length) && (';' != keyname[0]) && !Char.IsWhiteSpace(keyname[0]) && (-1 == keyname.IndexOf('\u0000')));
}
return false;
}
#if DEBUG
private static Hashtable SplitConnectionString(string connectionString, Hashtable synonyms, bool firstKey) {
Hashtable parsetable = new Hashtable();
Regex parser = (firstKey ? ConnectionStringRegexOdbc : ConnectionStringRegex);
const int KeyIndex = 1, ValueIndex = 2;
Debug.Assert(KeyIndex == parser.GroupNumberFromName("key"), "wrong key index");
Debug.Assert(ValueIndex == parser.GroupNumberFromName("value"), "wrong value index");
if (null != connectionString) {
Match match = parser.Match(connectionString);
if (!match.Success || (match.Length != connectionString.Length)) {
throw ADP.ConnectionStringSyntax(match.Length);
}
int indexValue = 0;
CaptureCollection keyvalues = match.Groups[ValueIndex].Captures;
foreach(Capture keypair in match.Groups[KeyIndex].Captures) {
string keyname = (firstKey ? keypair.Value : keypair.Value.Replace("==", "=")).ToLower(CultureInfo.InvariantCulture);
string keyvalue = keyvalues[indexValue++].Value;
if (0 < keyvalue.Length) {
if (!firstKey) {
switch(keyvalue[0]) {
case '\"':
keyvalue = keyvalue.Substring(1, keyvalue.Length-2).Replace("\"\"", "\"");
break;
case '\'':
keyvalue = keyvalue.Substring(1, keyvalue.Length-2).Replace("\'\'", "\'");
break;
default:
break;
}
}
}
else {
keyvalue = null;
}
DebugTraceKeyValuePair(keyname, keyvalue, synonyms);
string realkeyname = ((null != synonyms) ? (string)synonyms[keyname] : keyname);
if (!IsKeyNameValid(realkeyname)) {
throw ADP.KeywordNotSupported(keyname);
}
if (!firstKey || !parsetable.ContainsKey(realkeyname)) {
parsetable[realkeyname] = keyvalue; // last key-value pair wins (or first)
}
}
}
return parsetable;
}
private static void ParseComparison(Hashtable parsetable, string connectionString, Hashtable synonyms, bool firstKey, Exception e) {
try {
Hashtable parsedvalues = SplitConnectionString(connectionString, synonyms, firstKey);
foreach(DictionaryEntry entry in parsedvalues) {
string keyname = (string) entry.Key;
string value1 = (string) entry.Value;
string value2 = (string) parsetable[keyname];
Debug.Assert(parsetable.Contains(keyname), "ParseInternal code vs. regex mismatch keyname <" + keyname + ">");
Debug.Assert(value1 == value2, "ParseInternal code vs. regex mismatch keyvalue <" + value1 + "> <" + value2 +">");
}
}
catch(ArgumentException f) {
if (null != e) {
string msg1 = e.Message;
string msg2 = f.Message;
const string KeywordNotSupportedMessagePrefix = "Keyword not supported:";
const string WrongFormatMessagePrefix = "Format of the initialization string";
bool isEquivalent = (msg1 == msg2);
if (!isEquivalent)
{
// VSTFDEVDIV 479587: we also accept cases were Regex parser (debug only) reports "wrong format" and
// retail parsing code reports format exception in different location or "keyword not supported"
if (msg2.StartsWith(WrongFormatMessagePrefix, StringComparison.Ordinal)) {
if (msg1.StartsWith(KeywordNotSupportedMessagePrefix, StringComparison.Ordinal) || msg1.StartsWith(WrongFormatMessagePrefix, StringComparison.Ordinal)) {
isEquivalent = true;
}
}
}
Debug.Assert(isEquivalent, "ParseInternal code vs regex message mismatch: <"+msg1+"> <"+msg2+">");
}
else {
Debug.Assert(false, "ParseInternal code vs regex throw mismatch " + f.Message);
}
e = null;
}
if (null != e) {
Debug.Assert(false, "ParseInternal code threw exception vs regex mismatch");
}
}
#endif
private static NameValuePair ParseInternal(Hashtable parsetable, string connectionString, bool buildChain, Hashtable synonyms, bool firstKey) {
Debug.Assert(null != connectionString, "null connectionstring");
StringBuilder buffer = new StringBuilder();
NameValuePair localKeychain = null, keychain = null;
#if DEBUG
try {
#endif
int nextStartPosition = 0;
int endPosition = connectionString.Length;
while (nextStartPosition < endPosition) {
int startPosition = nextStartPosition;
string keyname, keyvalue;
nextStartPosition = GetKeyValuePair(connectionString, startPosition, buffer, firstKey, out keyname, out keyvalue);
if (ADP.IsEmpty(keyname)) {
// if (nextStartPosition != endPosition) { throw; }
break;
}
#if DEBUG
DebugTraceKeyValuePair(keyname, keyvalue, synonyms);
Debug.Assert(IsKeyNameValid(keyname), "ParseFailure, invalid keyname");
Debug.Assert(IsValueValidInternal(keyvalue), "parse failure, invalid keyvalue");
#endif
string realkeyname = ((null != synonyms) ? (string)synonyms[keyname] : keyname);
if (!IsKeyNameValid(realkeyname)) {
throw ADP.KeywordNotSupported(keyname);
}
if (!firstKey || !parsetable.Contains(realkeyname)) {
parsetable[realkeyname] = keyvalue; // last key-value pair wins (or first)
}
if(null != localKeychain) {
localKeychain = localKeychain.Next = new NameValuePair(realkeyname, keyvalue, nextStartPosition - startPosition);
}
else if (buildChain) { // first time only - don't contain modified chain from UDL file
keychain = localKeychain = new NameValuePair(realkeyname, keyvalue, nextStartPosition - startPosition);
}
}
#if DEBUG
}
catch(ArgumentException e) {
ParseComparison(parsetable, connectionString, synonyms, firstKey, e);
throw;
}
ParseComparison(parsetable, connectionString, synonyms, firstKey, null);
#endif
return keychain;
}
internal NameValuePair ReplacePasswordPwd(out string constr, bool fakePassword) {
bool expanded = false;
int copyPosition = 0;
NameValuePair head = null, tail = null, next = null;
StringBuilder builder = new StringBuilder(_usersConnectionString.Length);
for(NameValuePair current = KeyChain; null != current; current = current.Next) {
if ((KEY.Password != current.Name) && (SYNONYM.Pwd != current.Name)) {
builder.Append(_usersConnectionString, copyPosition, current.Length);
if (fakePassword) {
next = new NameValuePair(current.Name, current.Value, current.Length);
}
}
else if (fakePassword) { // replace user password/pwd value with *
const string equalstar = "=*;";
builder.Append(current.Name).Append(equalstar);
next = new NameValuePair(current.Name, "*", current.Name.Length + equalstar.Length);
expanded = true;
}
else { // drop the password/pwd completely in returning for user
expanded = true;
}
if (fakePassword) {
if (null != tail) {
tail = tail.Next = next;
}
else {
tail = head = next;
}
}
copyPosition += current.Length;
}
Debug.Assert(expanded, "password/pwd was not removed");
constr = builder.ToString();
return head;
}
internal static void ValidateKeyValuePair(string keyword, string value) {
if ((null == keyword) || !ConnectionStringValidKeyRegex.IsMatch(keyword)) {
throw ADP.InvalidKeyname(keyword);
}
if ((null != value) && !ConnectionStringValidValueRegex.IsMatch(value)) {
throw ADP.InvalidValue(keyword);
}
}
}
}
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