summaryrefslogtreecommitdiffstats
path: root/private/nw/nwlib/canon.c
blob: c33846a66ea2307f066fd9c1f69d5046d97110c4 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
/*++

Copyright (c) 1993  Microsoft Corporation

Module Name:

    canon.c

Abstract:

    Contains canonicalization routines for NetWare names.

Author:

    Rita Wong     (ritaw)    19-Feb-1993

Environment:


Revision History:


--*/


#include <procs.h>


DWORD
NwLibValidateLocalName(
    IN LPWSTR LocalName
    )
/*++

Routine Description:

    This routine checks to see if the supplied name is a valid
    DOS device name.

Arguments:

    LocalName - Supplies a local device name.  It can be any of
        the following:

            X:
            LPTn or LPTn:
            COMn or COMn:
            PRN or PRN:
            AUX or AUX:


Return Value:

    NO_ERROR - LocalName is valid.

    WN_BAD_NETNAME - LocalName is invalid.

--*/
{
    DWORD LocalNameLength;


    //
    // Cannot be a NULL or empty string
    //
    if (LocalName == NULL || *LocalName == 0) {
        return WN_BAD_NETNAME;
    }

    LocalNameLength = wcslen(LocalName);

    if (LocalNameLength == 1) {
        return WN_BAD_NETNAME;
    }

    if (LocalName[LocalNameLength - 1] == L':') {
        if (! IS_VALID_TOKEN(LocalName, LocalNameLength - 1)) {
            return WN_BAD_NETNAME;
        }
    }
    else {
        if (! IS_VALID_TOKEN(LocalName, LocalNameLength)) {
            return WN_BAD_NETNAME;
        }
    }

    if (LocalNameLength == 2) {
        //
        // Must be in the form of X:
        //
        if (! iswalpha(*LocalName)) {
            return WN_BAD_NETNAME;
        }

        if (LocalName[1] != L':') {
            return WN_BAD_NETNAME;
        }

        return NO_ERROR;
    }

    if (RtlIsDosDeviceName_U(LocalName) == 0) {
        return WN_BAD_NETNAME;
    }

    //
    // Valid DOS device name but invalid redirection name
    //
    if (_wcsnicmp(LocalName, L"NUL", 3) == 0) {
        return WN_BAD_NETNAME;

    }
    return NO_ERROR;
}


DWORD
NwLibCanonLocalName(
    IN LPWSTR LocalName,
    OUT LPWSTR *OutputBuffer,
    OUT LPDWORD OutputBufferLength OPTIONAL
    )
/*++

Routine Description:

    This routine canonicalizes the local name by uppercasing the string
    and converting the following:

          x:  -> X:
          LPTn: -> LPTn
          COMn: -> COMn
          PRN or PRN:  -> LPT1
          AUX or AUX:  -> COM1

Arguments:

    LocalName - Supplies a local device name.

    OutputBuffer - Receives a pointer to the canonicalized LocalName.

    OutputBufferLength - Receives the length of the canonicalized name
        in number of characters, if specified.

Return Value:

    NO_ERROR - Successfully canonicalized the local name.

    WN_BAD_NETNAME - LocalName is invalid.

    ERROR_NOT_ENOUGH_MEMORY - Could not allocate output buffer.

--*/
{
    DWORD status;
    DWORD LocalNameLength;


    status = NwLibValidateLocalName(LocalName);

    if (status != NO_ERROR) {
        return status;
    }

    LocalNameLength = wcslen(LocalName);

    //
    // Allocate output buffer.  Should be the size of the LocalName
    // plus 1 for the special case of PRN -> LPT1 or AUX -> COM1.
    //
    *OutputBuffer = (PVOID) LocalAlloc(
                                LMEM_ZEROINIT,
                                (LocalNameLength + 2) * sizeof(WCHAR)
                                );

    if (*OutputBuffer == NULL) {
        KdPrint(("NWLIB: NwLibCanonLocalName LocalAlloc failed %lu\n",
                 GetLastError()));
        return ERROR_NOT_ENOUGH_MEMORY;
    }

    wcscpy(*OutputBuffer, LocalName);

    if (LocalNameLength > 2) {

        if (_wcsnicmp(*OutputBuffer, L"PRN", 3) == 0) {

            //
            // Convert PRN or PRN: to LPT1
            //
            wcscpy(*OutputBuffer, L"LPT1");
            LocalNameLength = 4;

        }
        else if (_wcsnicmp(*OutputBuffer, L"AUX", 3) == 0) {

            //
            // Convert AUX or AUX: to COM1
            //
            wcscpy(*OutputBuffer, L"COM1");
            LocalNameLength = 4;
        }

        //
        // Remove trailing colon, if there is one, and decrement the length
        // of DOS device name.
        //
        if ((*OutputBuffer)[LocalNameLength - 1] == L':') {
            (*OutputBuffer)[--LocalNameLength] = 0;
        }
    }

    //
    // LocalName is always in uppercase.
    //
    _wcsupr(*OutputBuffer);

    if (ARGUMENT_PRESENT(OutputBufferLength)) {
        *OutputBufferLength = LocalNameLength;
    }

    return NO_ERROR;
}


DWORD
NwLibCanonRemoteName(
    IN LPWSTR LocalName OPTIONAL,
    IN LPWSTR RemoteName,
    OUT LPWSTR *OutputBuffer,
    OUT LPDWORD OutputBufferLength OPTIONAL
    )
/*++

Routine Description:

    This routine validates and canonicalizes the supplied
    NetWare UNC name.  It can be of any length in the form of:

        \\Server\Volume\Directory\Subdirectory

Arguments:

    LocalName - Supplies the local device name.  If it is NULL, then
        \\Server is an acceptable format for the UNC name.

    RemoteName - Supplies the UNC name.

    OutputBuffer - Receives a pointer to the canonicalized RemoteName.

    OutputBufferLength - Receives the length of the canonicalized name
        in number of characters, if specified.

Return Value:

    NO_ERROR - RemoteName is valid.

    WN_BAD_NETNAME - RemoteName is invalid.

--*/
{
    DWORD RemoteNameLength;
    DWORD i;
    DWORD TokenLength;
    LPWSTR TokenPtr;
    BOOL  fFirstToken = TRUE;


    //
    // Cannot be a NULL or empty string
    //
    if (RemoteName == NULL || *RemoteName == 0) {
        return WN_BAD_NETNAME;
    }

    RemoteNameLength = wcslen(RemoteName);

    //
    // Must be at least \\x\y if local device name is specified.
    // Otherwise it must be at least \\x.
    //
    if ((RemoteNameLength < 5 && ARGUMENT_PRESENT(LocalName)) ||
        (RemoteNameLength < 3)) {
        return WN_BAD_NETNAME;
    }

    //
    // First two characters must be "\\"
    //
    if (*RemoteName != L'\\' || RemoteName[1] != L'\\') {
        return WN_BAD_NETNAME;
    }

    if (! ARGUMENT_PRESENT(LocalName) &&
        (IS_VALID_TOKEN(&RemoteName[2], RemoteNameLength - 2))) {

        //
        // Return success for \\Server case.
        //

        *OutputBuffer = (PVOID) LocalAlloc(
                                    LMEM_ZEROINIT,
                                    (RemoteNameLength + 1) * sizeof(WCHAR)
                                    );

        if (*OutputBuffer == NULL) {
            KdPrint(("NWLIB: NwLibCanonRemoteName LocalAlloc failed %lu\n",
                     GetLastError()));
            return ERROR_NOT_ENOUGH_MEMORY;
        }

        wcscpy(*OutputBuffer, RemoteName);

        return NO_ERROR;
    }

    //
    // Must have at least one more backslash after the third character
    //
    if (wcschr(&RemoteName[3], L'\\') == NULL) {
        return WN_BAD_NETNAME;
    }

    //
    // Last character cannot a backward slash
    //
    if (RemoteName[RemoteNameLength - 1] == L'\\') {
        return WN_BAD_NETNAME;
    }

    //
    // Allocate output buffer.  Should be the size of the RemoteName
    // and space for an extra character to simplify parsing code below.
    //
    *OutputBuffer = (PVOID) LocalAlloc(
                                LMEM_ZEROINIT,
                                (RemoteNameLength + 2) * sizeof(WCHAR)
                                );


    if (*OutputBuffer == NULL) {
        KdPrint(("NWLIB: NwLibCanonRemoteName LocalAlloc failed %lu\n",
                 GetLastError()));
        return ERROR_NOT_ENOUGH_MEMORY;
    }

    wcscpy(*OutputBuffer, RemoteName);

    //
    // Convert all backslashes to NULL terminator, skipping first 2 chars.
    //
    for (i = 2; i < RemoteNameLength; i++) {
        if ((*OutputBuffer)[i] == L'\\') {

            (*OutputBuffer)[i] = 0;

            //
            // Two consecutive forward or backslashes is bad.
            //
            if ((i + 1 < RemoteNameLength) &&
                ((*OutputBuffer)[i + 1] == L'\\')) {

                (void) LocalFree((HLOCAL) *OutputBuffer);
                *OutputBuffer = NULL;
                return WN_BAD_NETNAME;
            }
        }
    }

    //
    // Validate each token of the RemoteName, separated by NULL terminator.
    //
    TokenPtr = *OutputBuffer + 2;  // Skip first 2 chars

    while (*TokenPtr != 0) {

        TokenLength = wcslen(TokenPtr);

        if (  ( fFirstToken && !IS_VALID_SERVER_TOKEN(TokenPtr, TokenLength))
           || ( !fFirstToken && !IS_VALID_TOKEN(TokenPtr, TokenLength))
           )
        {
            (void) LocalFree((HLOCAL) *OutputBuffer);
            *OutputBuffer = NULL;
            return WN_BAD_NETNAME;
        }

        fFirstToken = FALSE;
        TokenPtr += TokenLength + 1;
    }

    //
    // Convert NULL separators to backslashes
    //
    for (i = 0; i < RemoteNameLength; i++) {
        if ((*OutputBuffer)[i] == 0) {
            (*OutputBuffer)[i] = L'\\';
        }
    }

    if (ARGUMENT_PRESENT(OutputBufferLength)) {
        *OutputBufferLength = RemoteNameLength;
    }

    return NO_ERROR;
}


DWORD
NwLibCanonUserName(
    IN LPWSTR UserName,
    OUT LPWSTR *OutputBuffer,
    OUT LPDWORD OutputBufferLength OPTIONAL
    )
/*++

Routine Description:

    This routine canonicalizes the user name by checking to see
    if the name contains any illegal characters.


Arguments:

    UserName - Supplies a username.

    OutputBuffer - Receives a pointer to the canonicalized UserName.

    OutputBufferLength - Receives the length of the canonicalized name
        in number of characters, if specified.

Return Value:

    NO_ERROR - Successfully canonicalized the username.

    WN_BAD_NETNAME - UserName is invalid.

    ERROR_NOT_ENOUGH_MEMORY - Could not allocate output buffer.

--*/
{
    DWORD UserNameLength;


    //
    // Cannot be a NULL or empty string
    //
    if (UserName == NULL) {
        return WN_BAD_NETNAME;
    }

    UserNameLength = wcslen(UserName);

    if (! IS_VALID_TOKEN(UserName, UserNameLength)) {
        return WN_BAD_NETNAME;
    }

    //
    // Allocate output buffer.  Should be the size of the UserName
    // plus 1 for the special case of PRN -> LPT1 or AUX -> COM1.
    //
    *OutputBuffer = (PVOID) LocalAlloc(
                                LMEM_ZEROINIT,
                                (UserNameLength + 1) * sizeof(WCHAR)
                                );

    if (*OutputBuffer == NULL) {
        KdPrint(("NWLIB: NwLibCanonUserName LocalAlloc failed %lu\n",
                 GetLastError()));
        return ERROR_NOT_ENOUGH_MEMORY;
    }

    wcscpy(*OutputBuffer, UserName);

    if (ARGUMENT_PRESENT(OutputBufferLength)) {
        *OutputBufferLength = UserNameLength;
    }

    return NO_ERROR;
}