summaryrefslogtreecommitdiffstats
path: root/NetworkPkg/HttpUtilitiesDxe/HttpUtilitiesProtocol.c
blob: c7d43576ea62c0db8a2d7d78d9b3027dd5abe720 (plain)
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
/** @file
  Implementation of EFI_HTTP_PROTOCOL protocol interfaces.

  Copyright (c) 2015 - 2018, Intel Corporation. All rights reserved.<BR>
  (C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
  SPDX-License-Identifier: BSD-2-Clause-Patent

**/

#include "HttpUtilitiesDxe.h"

EFI_HTTP_UTILITIES_PROTOCOL  mHttpUtilitiesProtocol = {
  HttpUtilitiesBuild,
  HttpUtilitiesParse
};

/**
  Create HTTP header based on a combination of seed header, fields
  to delete, and fields to append.

  The Build() function is used to manage the headers portion of an
  HTTP message by providing the ability to add, remove, or replace
  HTTP headers.

  @param[in]  This                Pointer to EFI_HTTP_UTILITIES_PROTOCOL instance.
  @param[in]  SeedMessageSize     Size of the initial HTTP header. This can be zero.
  @param[in]  SeedMessage         Initial HTTP header to be used as a base for
                                  building a new HTTP header. If NULL,
                                  SeedMessageSize is ignored.
  @param[in]  DeleteCount         Number of null-terminated HTTP header field names
                                  in DeleteList.
  @param[in]  DeleteList          List of null-terminated HTTP header field names to
                                  remove from SeedMessage. Only the field names are
                                  in this list because the field values are irrelevant
                                  to this operation.
  @param[in]  AppendCount         Number of header fields in AppendList.
  @param[in]  AppendList          List of HTTP headers to populate NewMessage with.
                                  If SeedMessage is not NULL, AppendList will be
                                  appended to the existing list from SeedMessage in
                                  NewMessage.
  @param[out] NewMessageSize      Pointer to number of header fields in NewMessage.
  @param[out] NewMessage          Pointer to a new list of HTTP headers based on.

  @retval EFI_SUCCESS             Add, remove, and replace operations succeeded.
  @retval EFI_OUT_OF_RESOURCES    Could not allocate memory for NewMessage.
  @retval EFI_INVALID_PARAMETER   One or more of the following conditions is TRUE:
                                  This is NULL.
**/
EFI_STATUS
EFIAPI
HttpUtilitiesBuild (
  IN     EFI_HTTP_UTILITIES_PROTOCOL  *This,
  IN     UINTN                        SeedMessageSize,
  IN     VOID                         *SeedMessage  OPTIONAL,
  IN     UINTN                        DeleteCount,
  IN     CHAR8                        *DeleteList[]  OPTIONAL,
  IN     UINTN                        AppendCount,
  IN     EFI_HTTP_HEADER              *AppendList[]  OPTIONAL,
  OUT UINTN                           *NewMessageSize,
  OUT VOID                            **NewMessage
  )
{
  EFI_STATUS       Status;
  EFI_HTTP_HEADER  *SeedHeaderFields;
  UINTN            SeedFieldCount;
  UINTN            Index;
  EFI_HTTP_HEADER  *TempHeaderFields;
  UINTN            TempFieldCount;
  EFI_HTTP_HEADER  *NewHeaderFields;
  UINTN            NewFieldCount;
  EFI_HTTP_HEADER  *HttpHeader;
  UINTN            StrLength;
  UINT8            *NewMessagePtr;

  SeedHeaderFields = NULL;
  SeedFieldCount   = 0;
  TempHeaderFields = NULL;
  TempFieldCount   = 0;
  NewHeaderFields  = NULL;
  NewFieldCount    = 0;

  HttpHeader      = NULL;
  StrLength       = 0;
  NewMessagePtr   = NULL;
  *NewMessageSize = 0;
  Status          = EFI_SUCCESS;

  if (This == NULL) {
    return EFI_INVALID_PARAMETER;
  }

  if (SeedMessage != NULL) {
    Status = This->Parse (
                     This,
                     SeedMessage,
                     SeedMessageSize,
                     &SeedHeaderFields,
                     &SeedFieldCount
                     );
    if (EFI_ERROR (Status)) {
      goto ON_EXIT;
    }
  }

  //
  // Handle DeleteList
  //
  if ((SeedFieldCount != 0) && (DeleteCount != 0)) {
    TempHeaderFields = AllocateZeroPool (SeedFieldCount * sizeof (EFI_HTTP_HEADER));
    if (TempHeaderFields == NULL) {
      Status = EFI_OUT_OF_RESOURCES;
      goto ON_EXIT;
    }

    for (Index = 0, TempFieldCount = 0; Index < SeedFieldCount; Index++) {
      //
      // Check whether each SeedHeaderFields member is in DeleteList
      //
      if (HttpIsValidHttpHeader (DeleteList, DeleteCount, SeedHeaderFields[Index].FieldName)) {
        Status = HttpSetFieldNameAndValue (
                   &TempHeaderFields[TempFieldCount],
                   SeedHeaderFields[Index].FieldName,
                   SeedHeaderFields[Index].FieldValue
                   );
        if (EFI_ERROR (Status)) {
          goto ON_EXIT;
        }

        TempFieldCount++;
      }
    }
  } else {
    TempHeaderFields = SeedHeaderFields;
    TempFieldCount   = SeedFieldCount;
  }

  //
  // Handle AppendList
  //
  NewHeaderFields = AllocateZeroPool ((TempFieldCount + AppendCount) * sizeof (EFI_HTTP_HEADER));
  if (NewHeaderFields == NULL) {
    Status = EFI_OUT_OF_RESOURCES;
    goto ON_EXIT;
  }

  for (Index = 0; Index < TempFieldCount; Index++) {
    Status = HttpSetFieldNameAndValue (
               &NewHeaderFields[Index],
               TempHeaderFields[Index].FieldName,
               TempHeaderFields[Index].FieldValue
               );
    if (EFI_ERROR (Status)) {
      goto ON_EXIT;
    }
  }

  NewFieldCount = TempFieldCount;

  for (Index = 0; Index < AppendCount; Index++) {
    HttpHeader = HttpFindHeader (NewFieldCount, NewHeaderFields, AppendList[Index]->FieldName);
    if (HttpHeader != NULL) {
      Status = HttpSetFieldNameAndValue (
                 HttpHeader,
                 AppendList[Index]->FieldName,
                 AppendList[Index]->FieldValue
                 );
      if (EFI_ERROR (Status)) {
        goto ON_EXIT;
      }
    } else {
      Status = HttpSetFieldNameAndValue (
                 &NewHeaderFields[NewFieldCount],
                 AppendList[Index]->FieldName,
                 AppendList[Index]->FieldValue
                 );
      if (EFI_ERROR (Status)) {
        goto ON_EXIT;
      }

      NewFieldCount++;
    }
  }

  //
  // Calculate NewMessageSize, then build NewMessage
  //
  for (Index = 0; Index < NewFieldCount; Index++) {
    HttpHeader = &NewHeaderFields[Index];

    StrLength        = AsciiStrLen (HttpHeader->FieldName);
    *NewMessageSize += StrLength;

    StrLength        = sizeof (": ") - 1;
    *NewMessageSize += StrLength;

    StrLength        = AsciiStrLen (HttpHeader->FieldValue);
    *NewMessageSize += StrLength;

    StrLength        = sizeof ("\r\n") - 1;
    *NewMessageSize += StrLength;
  }

  StrLength        = sizeof ("\r\n") - 1;
  *NewMessageSize += StrLength;

  *NewMessage = AllocateZeroPool (*NewMessageSize);
  if (*NewMessage == NULL) {
    Status = EFI_OUT_OF_RESOURCES;
    goto ON_EXIT;
  }

  NewMessagePtr = (UINT8 *)(*NewMessage);

  for (Index = 0; Index < NewFieldCount; Index++) {
    HttpHeader = &NewHeaderFields[Index];

    StrLength = AsciiStrLen (HttpHeader->FieldName);
    CopyMem (NewMessagePtr, HttpHeader->FieldName, StrLength);
    NewMessagePtr += StrLength;

    StrLength = sizeof (": ") - 1;
    CopyMem (NewMessagePtr, ": ", StrLength);
    NewMessagePtr += StrLength;

    StrLength = AsciiStrLen (HttpHeader->FieldValue);
    CopyMem (NewMessagePtr, HttpHeader->FieldValue, StrLength);
    NewMessagePtr += StrLength;

    StrLength = sizeof ("\r\n") - 1;
    CopyMem (NewMessagePtr, "\r\n", StrLength);
    NewMessagePtr += StrLength;
  }

  StrLength = sizeof ("\r\n") - 1;
  CopyMem (NewMessagePtr, "\r\n", StrLength);
  NewMessagePtr += StrLength;

  ASSERT (*NewMessageSize == (UINTN)NewMessagePtr - (UINTN)(*NewMessage));

  //
  // Free allocated buffer
  //
ON_EXIT:
  if (SeedHeaderFields != NULL) {
    HttpFreeHeaderFields (SeedHeaderFields, SeedFieldCount);
  }

  if (TempHeaderFields != NULL) {
    HttpFreeHeaderFields (TempHeaderFields, TempFieldCount);
  }

  if (NewHeaderFields != NULL) {
    HttpFreeHeaderFields (NewHeaderFields, NewFieldCount);
  }

  return Status;
}

/**
  Parses HTTP header and produces an array of key/value pairs.

  The Parse() function is used to transform data stored in HttpHeader
  into a list of fields paired with their corresponding values.

  @param[in]  This                Pointer to EFI_HTTP_UTILITIES_PROTOCOL instance.
  @param[in]  HttpMessage         Contains raw unformatted HTTP header string.
  @param[in]  HttpMessageSize     Size of HTTP header.
  @param[out] HeaderFields        Array of key/value header pairs.
  @param[out] FieldCount          Number of headers in HeaderFields.

  @retval EFI_SUCCESS             Allocation succeeded.
  @retval EFI_NOT_STARTED         This EFI HTTP Protocol instance has not been
                                  initialized.
  @retval EFI_INVALID_PARAMETER   One or more of the following conditions is TRUE:
                                  This is NULL.
                                  HttpMessage is NULL.
                                  HeaderFields is NULL.
                                  FieldCount is NULL.
**/
EFI_STATUS
EFIAPI
HttpUtilitiesParse (
  IN  EFI_HTTP_UTILITIES_PROTOCOL  *This,
  IN  CHAR8                        *HttpMessage,
  IN  UINTN                        HttpMessageSize,
  OUT EFI_HTTP_HEADER              **HeaderFields,
  OUT UINTN                        *FieldCount
  )
{
  EFI_STATUS  Status;
  CHAR8       *TempHttpMessage;
  CHAR8       *Token;
  CHAR8       *NextToken;
  CHAR8       *FieldName;
  CHAR8       *FieldValue;
  UINTN       Index;
  UINTN       HttpBufferSize;

  Status          = EFI_SUCCESS;
  TempHttpMessage = NULL;
  Token           = NULL;
  NextToken       = NULL;
  FieldName       = NULL;
  FieldValue      = NULL;
  Index           = 0;

  if ((This == NULL) || (HttpMessage == NULL) || (HeaderFields == NULL) || (FieldCount == NULL)) {
    return EFI_INVALID_PARAMETER;
  }

  //
  // Append the http response string along with a Null-terminator.
  //
  HttpBufferSize  = HttpMessageSize + 1;
  TempHttpMessage = AllocatePool (HttpBufferSize);
  if (TempHttpMessage == NULL) {
    return EFI_OUT_OF_RESOURCES;
  }

  CopyMem (TempHttpMessage, HttpMessage, HttpMessageSize);
  *(TempHttpMessage + HttpMessageSize) = '\0';

  //
  // Get header number
  //
  *FieldCount = 0;
  Token       = TempHttpMessage;
  while (TRUE) {
    FieldName  = NULL;
    FieldValue = NULL;
    NextToken  = HttpGetFieldNameAndValue (Token, &FieldName, &FieldValue);
    Token      = NextToken;
    if ((FieldName == NULL) || (FieldValue == NULL)) {
      break;
    }

    (*FieldCount)++;
  }

  if (*FieldCount == 0) {
    Status =  EFI_INVALID_PARAMETER;
    goto ON_EXIT;
  }

  //
  // Allocate buffer for header
  //
  *HeaderFields = AllocateZeroPool ((*FieldCount) * sizeof (EFI_HTTP_HEADER));
  if (*HeaderFields == NULL) {
    *FieldCount = 0;
    Status      = EFI_OUT_OF_RESOURCES;
    goto ON_EXIT;
  }

  CopyMem (TempHttpMessage, HttpMessage, HttpMessageSize);

  //
  // Set Field and Value to each header
  //
  Token = TempHttpMessage;
  while (Index < *FieldCount) {
    FieldName  = NULL;
    FieldValue = NULL;
    NextToken  = HttpGetFieldNameAndValue (Token, &FieldName, &FieldValue);
    Token      = NextToken;
    if ((FieldName == NULL) || (FieldValue == NULL)) {
      break;
    }

    Status = HttpSetFieldNameAndValue (&(*HeaderFields)[Index], FieldName, FieldValue);
    if (EFI_ERROR (Status)) {
      *FieldCount = 0;
      HttpFreeHeaderFields (*HeaderFields, Index);
      goto ON_EXIT;
    }

    Index++;
  }

  //
  // Free allocated buffer
  //
ON_EXIT:
  if (TempHttpMessage != NULL) {
    FreePool (TempHttpMessage);
  }

  return Status;
}