593 lines
16 KiB
C
593 lines
16 KiB
C
/*++
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Copyright (c) 1993-1993 Microsoft Corporation
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Module Name:
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usrprop.c
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Abstract:
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This module implements QueryUserProperty() and SetUserProperty()
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which read and write NetWare Properties to the UserParms field.
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Author:
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Andy Herron (andyhe) 24-May-1993
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Congpa You (CongpaY) 28-Oct-1993 Seperated SetUserProperty() and
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QueryUserProperty() out from usrprop.c
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in ncpsrv\svcdlls\ncpsvc\libbind,
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modified the code and fixed a few
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existing problems.
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Revision History:
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--*/
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#include "nt.h"
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#include "ntrtl.h"
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#include "nturtl.h"
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#include "ntioapi.h"
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#include "windef.h"
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#include "winbase.h"
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#include "stdio.h"
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#include "stdlib.h"
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#include "winuser.h"
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#include "usrprop.h"
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#define NCP_SET 0x02 /* Series of Object ID numbers, each 4
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bytes long */
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//
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// All internal (opaque) structures are listed here since no one else
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// needs to reference them.
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//
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//
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// The user's Parameter field is mapped out to a structure that contains
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// the backlevel 48 WCHARs for Mac/Ras compatibility plus a new structure
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// that is basically an array of chars that make up a property name plus
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// a property value.
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//
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//
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// This is the structure for an individual property. Note that there are
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// no null terminators in this.
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//
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typedef struct _USER_PROPERTY {
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WCHAR PropertyLength; // length of property name
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WCHAR ValueLength; // length of property value
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WCHAR PropertyFlag; // type of property (1 = set, 2 = item)
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WCHAR Property[1]; // start of property name, followed by value
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} USER_PROPERTY, *PUSER_PROPERTY;
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//
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// This is the structure that maps the beginning of the user's Parameters
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// field. It is only separate so that we can do a sizeof() without including
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// the first property, which may or may not be there.
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//
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typedef struct _USER_PROPERTIES_HDR {
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WCHAR BacklevelParms[48]; // RAS & Mac data stored here.
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WCHAR PropertySignature; // signature that we can look for.
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WCHAR PropertyCount; // number of properties present.
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} USER_PROPERTIES_HDR, *PUSER_PROPERTIES_HDR;
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//
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// This structure maps out the whole of the user's Parameters field when
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// the user properties structure is present and at least one property is
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// defined.
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//
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typedef struct _USER_PROPERTIES {
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USER_PROPERTIES_HDR Header;
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USER_PROPERTY FirstProperty;
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} USER_PROPERTIES, *PUSER_PROPERTIES;
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//
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// forward references
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//
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NTSTATUS
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UserPropertyAllocBlock (
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IN PUNICODE_STRING Existing,
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IN ULONG DesiredLength,
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IN OUT PUNICODE_STRING New
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);
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BOOL
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FindUserProperty (
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PUSER_PROPERTIES UserProperties,
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LPWSTR Property,
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PUSER_PROPERTY *pUserProperty,
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USHORT *pCount
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);
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VOID
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RemoveUserProperty (
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UNICODE_STRING *puniUserParms,
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PUSER_PROPERTY UserProperty,
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USHORT Count,
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BOOL *Update
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);
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NTSTATUS
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SetUserProperty (
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IN LPWSTR UserParms,
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IN LPWSTR Property,
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IN UNICODE_STRING PropertyValue,
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IN WCHAR PropertyFlag,
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OUT LPWSTR *pNewUserParms, // memory has to be freed afer use.
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OUT BOOL *Update
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)
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/*
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This function sets a property field in the user's Parameters field.
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*/
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{
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NTSTATUS status;
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UNICODE_STRING uniUserParms;
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UNICODE_STRING uniNewUserParms;
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USHORT Count = 0;
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USHORT PropertyLength;
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USHORT ValueLength;
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PUSER_PROPERTIES UserProperties;
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PUSER_PROPERTY UserProperty;
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LPWSTR PropertyValueString = NULL;
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INT i;
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UCHAR *pchValue = NULL;
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// Check if parameters are correct.
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if (Property == NULL)
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{
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return( STATUS_INVALID_PARAMETER );
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}
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// Initialize output variables.
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*Update = FALSE;
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*pNewUserParms = NULL;
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// Converty UserParms to unicode string.
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uniUserParms.Buffer = UserParms;
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uniUserParms.Length = UserParms? (lstrlenW(UserParms) + 1)* sizeof (WCHAR)
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: 0;
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uniUserParms.MaximumLength = uniUserParms.Length;
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/** Get the length of the property name **/
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PropertyLength = lstrlenW( Property ) * sizeof(WCHAR);
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/** Get the length of the property value **/
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ValueLength = PropertyValue.Length;
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if (ValueLength != 0)
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{
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// Converty property value to asci string so that
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// if property value is 0, it can be stored correctly.
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PropertyValueString = (LPWSTR) LocalAlloc (LPTR, (ValueLength+1)*sizeof (WCHAR));
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pchValue = (UCHAR *) PropertyValue.Buffer;
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// BUGBUG. Since wsprint converts 0x00 to 20 30 (20 is
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// space and 30 is 0), sscanf converts 20 30 to 0. If the
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// value is uncode string, this convertsion would not
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// convert back to original value. So if we want to store
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// some value in the UserParms, we have to pass in ansi
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// string.
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for (i = 0; i < ValueLength; i++)
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{
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wsprintfA ((PCHAR)(PropertyValueString+i), "%02x", *(pchValue+i));
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}
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*(PropertyValueString+ValueLength) = 0;
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ValueLength = ValueLength * sizeof (WCHAR);
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}
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//
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// check that user has valid property structure , if not, create one
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//
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if (UserParms != NULL)
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{
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Count = (lstrlenW (UserParms) + 1)* sizeof(WCHAR);
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}
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if (Count < sizeof( USER_PROPERTIES))
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{
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Count = sizeof( USER_PROPERTIES_HDR ) + sizeof(WCHAR);
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}
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if (ValueLength > 0)
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{
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Count += sizeof( USER_PROPERTY ) + PropertyLength + ValueLength;
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}
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if (Count > 0x7FFF)
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{
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// can't be bigger than 32K of user parms.
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return (STATUS_BUFFER_OVERFLOW);
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}
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status = UserPropertyAllocBlock( &uniUserParms,
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Count,
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&uniNewUserParms );
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if ( !NT_SUCCESS(status) )
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{
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return status;
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}
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// Make the output pNewUserParms point to uniNewUserPams's buffer
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// which is the new UserParms string.
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*pNewUserParms = uniNewUserParms.Buffer;
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UserProperties = (PUSER_PROPERTIES) uniNewUserParms.Buffer;
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if (FindUserProperty (UserProperties,
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Property,
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&UserProperty,
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&Count))
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{
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RemoveUserProperty ( &uniNewUserParms,
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UserProperty,
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Count,
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Update);
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}
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//
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// If the new value of the property is not null, add it.
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//
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if (ValueLength > 0) {
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// find the end of the parameters list
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UserProperty = &(UserProperties->FirstProperty);
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for (Count = 1; Count <= UserProperties->Header.PropertyCount; Count++)
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{
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UserProperty = (PUSER_PROPERTY)
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((LPSTR)((LPSTR) UserProperty +
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sizeof(USER_PROPERTY) + // length of entry
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UserProperty->PropertyLength +
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UserProperty->ValueLength -
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sizeof(WCHAR))); // for Property[0]
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}
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//
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// append it to the end and update length of string
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//
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UserProperty->PropertyFlag = (PropertyFlag & NCP_SET) ?
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USER_PROPERTY_TYPE_SET :
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USER_PROPERTY_TYPE_ITEM;
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UserProperty->PropertyLength = PropertyLength;
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UserProperty->ValueLength = ValueLength;
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RtlCopyMemory( &(UserProperty->Property[0]),
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Property,
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PropertyLength );
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RtlCopyMemory( &(UserProperty->Property[PropertyLength / sizeof(WCHAR)]),
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PropertyValueString,
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ValueLength );
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uniNewUserParms.Length +=
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sizeof(USER_PROPERTY) + // length of entry
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PropertyLength + // length of property name string
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ValueLength - // length of value string
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sizeof(WCHAR); // account for WCHAR Property[1]
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UserProperties->Header.PropertyCount++;
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*Update = TRUE;
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}
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// UserParms is already null terminated. We don't need to set the
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// end of UserParms to be NULL since we zero init the buffer already.
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return( status );
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} // SetUserProperty
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#define MAPHEXTODIGIT(x) ( x >= '0' && x <= '9' ? (x-'0') : \
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x >= 'A' && x <= 'F' ? (x-'A'+10) : \
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x >= 'a' && x <= 'f' ? (x-'a'+10) : 0 )
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NTSTATUS
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QueryUserProperty (
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IN LPWSTR UserParms,
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IN LPWSTR PropertyName,
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OUT PWCHAR PropertyFlag,
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OUT PUNICODE_STRING PropertyValue
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)
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/*
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This routine returns a user definable property value as it is stored
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in the user's Parameters field. Note that the RAS/MAC fields are
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stripped before we start processing user properties.
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*/
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{
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USHORT PropertyNameLength;
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USHORT Count;
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PUSER_PROPERTY UserProperty;
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WCHAR *Value;
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UINT i;
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CHAR *PropertyValueString;
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CHAR *pchValue;
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// Set PropertyValue->Length to 0 initially. If the property is not found
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// it will still be 0 on exit.
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PropertyValue->Length = 0;
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PropertyValue->Buffer = NULL;
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PropertyNameLength = lstrlenW(PropertyName) * sizeof(WCHAR);
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// Check if UserParms have the right structure.
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if (FindUserProperty ((PUSER_PROPERTIES) UserParms,
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PropertyName,
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&UserProperty,
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&Count) )
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{
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Value = (LPWSTR)(LPSTR)((LPSTR) &(UserProperty->Property[0]) +
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PropertyNameLength);
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//
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// Found the requested property
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//
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//
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// Copy the property flag.
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//
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if (PropertyFlag)
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*PropertyFlag = UserProperty->PropertyFlag;
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// Allocate memory for PropertyValue->Buffer
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PropertyValueString = LocalAlloc ( LPTR, UserProperty->ValueLength+1);
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PropertyValue->Buffer = LocalAlloc ( LPTR, UserProperty->ValueLength/sizeof(WCHAR));
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//
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// Make sure the property value length is valid.
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//
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if ((PropertyValue->Buffer == NULL) || (PropertyValueString == NULL))
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{
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return STATUS_INSUFFICIENT_RESOURCES;
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}
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//
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// Copy the property value to the buffer.
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//
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RtlCopyMemory( PropertyValueString,
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Value,
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UserProperty->ValueLength );
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pchValue = (CHAR *) PropertyValue->Buffer;
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// Convert from value unicode string to value.
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for (i = 0; i < UserProperty->ValueLength/sizeof(WCHAR) ; i++)
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{
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// sscanf will trash memory.
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// sscanf( PropertyValueString+2*i, "%2x", pchValue+i);
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pchValue[i] = MAPHEXTODIGIT( PropertyValueString[2*i]) * 16 +
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MAPHEXTODIGIT( PropertyValueString[2*i+1]);
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}
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PropertyValue->Length = UserProperty->ValueLength/sizeof(WCHAR);
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PropertyValue->MaximumLength = UserProperty->ValueLength/sizeof(WCHAR);
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LocalFree( PropertyValueString);
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}
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return STATUS_SUCCESS;
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} // QueryUserProperty
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// Common routine used by QueryUserProperty() and SetUserProperty().
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BOOL
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FindUserProperty (
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PUSER_PROPERTIES UserProperties,
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LPWSTR Property,
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PUSER_PROPERTY *pUserProperty,
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USHORT *pCount
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)
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{
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BOOL fFound = FALSE;
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USHORT PropertyLength;
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//
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// Check if user has valid property structure attached,
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// pointed to by UserProperties.
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//
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if ( ( UserProperties != NULL )
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&& ( lstrlenW( (LPWSTR) UserProperties) * sizeof(WCHAR) >
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sizeof(UserProperties->Header.BacklevelParms))
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&& ( UserProperties->Header.PropertySignature == USER_PROPERTY_SIGNATURE)
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)
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{
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//
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// user has valid property structure.
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//
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*pUserProperty = &(UserProperties->FirstProperty);
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PropertyLength = lstrlenW( Property ) * sizeof(WCHAR);
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for ( *pCount = 1; *pCount <= UserProperties->Header.PropertyCount;
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(*pCount)++ )
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{
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if ( ( PropertyLength == (*pUserProperty)->PropertyLength )
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&& ( RtlCompareMemory( &((*pUserProperty)->Property[0]),
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Property,
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PropertyLength ) == PropertyLength )
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)
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{
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fFound = TRUE;
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break;
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}
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*pUserProperty = (PUSER_PROPERTY)
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((LPSTR) (*pUserProperty)
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+ sizeof( USER_PROPERTY )
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+ (*pUserProperty)->PropertyLength
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+ (*pUserProperty)->ValueLength
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- sizeof(WCHAR)); // for Property[0]
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}
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}
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return( fFound );
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} // FindUserProperty
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// Remove a property field from the User Parms.
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VOID
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RemoveUserProperty (
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UNICODE_STRING *puniUserParms,
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PUSER_PROPERTY UserProperty,
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USHORT Count,
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BOOL *Update
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)
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{
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PUSER_PROPERTIES UserProperties;
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PUSER_PROPERTY NextProperty;
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USHORT OldParmLength;
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UserProperties = (PUSER_PROPERTIES) puniUserParms->Buffer;
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OldParmLength = sizeof( USER_PROPERTY ) +
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UserProperty->PropertyLength +
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UserProperty->ValueLength -
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sizeof(WCHAR); // for Property[0]
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NextProperty = (PUSER_PROPERTY)(LPSTR)((LPSTR) UserProperty + OldParmLength);
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//
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// if we're not on the last one, copy the remaining buffer up
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//
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if (Count < UserProperties->Header.PropertyCount) {
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RtlMoveMemory( UserProperty,
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NextProperty,
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puniUserParms->Length -
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((LPSTR) NextProperty -
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(LPSTR) puniUserParms->Buffer ));
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}
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//
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// Now reduce the length of the buffer by the amount we pulled out
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//
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puniUserParms->Length -= OldParmLength;
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UserProperties->Header.PropertyCount--;
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*Update = TRUE;
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} // RemoveUserProperty
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NTSTATUS
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UserPropertyAllocBlock (
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IN PUNICODE_STRING Existing,
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IN ULONG DesiredLength,
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IN OUT PUNICODE_STRING New
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)
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/*
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This allocates a larger block for user's parameters and copies the old
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block in.
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*/
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{
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PUSER_PROPERTIES UserProperties;
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CLONG Count;
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WCHAR *pNewBuff;
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//
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// We will allocate a new buffer to store the new parameters
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// and copy the existing parameters into it.
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//
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New->Buffer = LocalAlloc (LPTR, DesiredLength);
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if ( New->Buffer == NULL)
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{
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return STATUS_INSUFFICIENT_RESOURCES;
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}
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New->MaximumLength = (USHORT) DesiredLength;
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if (Existing != NULL)
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{
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New->Length = Existing->Length;
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RtlCopyMemory( New->Buffer,
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Existing->Buffer,
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Existing->Length );
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}
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else
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{
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New->Length = 0;
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}
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//
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// Ensure that we don't have any nulls in our string.
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//
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for ( Count = 0;
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Count < New->Length / sizeof(WCHAR);
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Count++ )
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{
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if (*(New->Buffer + Count) == L'\0')
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{
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New->Length = (USHORT) Count * sizeof(WCHAR);
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break;
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}
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}
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//
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// now pad it out with spaces until reached Mac+Ras reserved length
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//
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pNewBuff = (WCHAR *) New->Buffer + ( New->Length / sizeof(WCHAR) );
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while ( New->Length < sizeof(UserProperties->Header.BacklevelParms))
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{
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*( pNewBuff++ ) = L' ';
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New->Length += sizeof(WCHAR);
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}
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//
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// If the signature isn't there, stick it in and set prop count to 0
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//
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UserProperties = (PUSER_PROPERTIES) New->Buffer;
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if (New->Length < sizeof(USER_PROPERTIES_HDR) ||
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UserProperties->Header.PropertySignature != USER_PROPERTY_SIGNATURE)
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{
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UserProperties->Header.PropertySignature = USER_PROPERTY_SIGNATURE;
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UserProperties->Header.PropertyCount = 0;
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New->Length = sizeof(USER_PROPERTIES_HDR);
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}
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return STATUS_SUCCESS;
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} // UserPropertyAllocBlock
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// usrprop.c eof.
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