1 /** @file
2 This library is used to share code between UEFI network stack modules.
3 It provides the helper routines to parse the HTTP message byte stream.
4
5 Copyright (c) 2015 - 2019, Intel Corporation. All rights reserved.<BR>
6 (C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
7 SPDX-License-Identifier: BSD-2-Clause-Patent
8
9 **/
10
11 #include "DxeHttpLib.h"
12
13
14
15 /**
16 Decode a percent-encoded URI component to the ASCII character.
17
18 Decode the input component in Buffer according to RFC 3986. The caller is responsible to make
19 sure ResultBuffer points to a buffer with size equal or greater than ((AsciiStrSize (Buffer))
20 in bytes.
21
22 @param[in] Buffer The pointer to a percent-encoded URI component.
23 @param[in] BufferLength Length of Buffer in bytes.
24 @param[out] ResultBuffer Point to the buffer to store the decode result.
25 @param[out] ResultLength Length of decoded string in ResultBuffer in bytes.
26
27 @retval EFI_SUCCESS Successfully decoded the URI.
28 @retval EFI_INVALID_PARAMETER Buffer is not a valid percent-encoded string.
29
30 **/
31 EFI_STATUS
32 EFIAPI
UriPercentDecode(IN CHAR8 * Buffer,IN UINT32 BufferLength,OUT CHAR8 * ResultBuffer,OUT UINT32 * ResultLength)33 UriPercentDecode (
34 IN CHAR8 *Buffer,
35 IN UINT32 BufferLength,
36 OUT CHAR8 *ResultBuffer,
37 OUT UINT32 *ResultLength
38 )
39 {
40 UINTN Index;
41 UINTN Offset;
42 CHAR8 HexStr[3];
43
44 if (Buffer == NULL || BufferLength == 0 || ResultBuffer == NULL) {
45 return EFI_INVALID_PARAMETER;
46 }
47
48 Index = 0;
49 Offset = 0;
50 HexStr[2] = '\0';
51 while (Index < BufferLength) {
52 if (Buffer[Index] == '%') {
53 if (Index + 1 >= BufferLength || Index + 2 >= BufferLength ||
54 !NET_IS_HEX_CHAR (Buffer[Index+1]) || !NET_IS_HEX_CHAR (Buffer[Index+2])) {
55 return EFI_INVALID_PARAMETER;
56 }
57 HexStr[0] = Buffer[Index+1];
58 HexStr[1] = Buffer[Index+2];
59 ResultBuffer[Offset] = (CHAR8) AsciiStrHexToUintn (HexStr);
60 Index += 3;
61 } else {
62 ResultBuffer[Offset] = Buffer[Index];
63 Index++;
64 }
65 Offset++;
66 }
67
68 *ResultLength = (UINT32) Offset;
69
70 return EFI_SUCCESS;
71 }
72
73 /**
74 This function return the updated state according to the input state and next character of
75 the authority.
76
77 @param[in] Char Next character.
78 @param[in] State Current value of the parser state machine.
79 @param[in] IsRightBracket TRUE if there is an sign ']' in the authority component and
80 indicates the next part is ':' before Port.
81
82 @return Updated state value.
83 **/
84 HTTP_URL_PARSE_STATE
NetHttpParseAuthorityChar(IN CHAR8 Char,IN HTTP_URL_PARSE_STATE State,IN BOOLEAN * IsRightBracket)85 NetHttpParseAuthorityChar (
86 IN CHAR8 Char,
87 IN HTTP_URL_PARSE_STATE State,
88 IN BOOLEAN *IsRightBracket
89 )
90 {
91
92 //
93 // RFC 3986:
94 // The authority component is preceded by a double slash ("//") and is
95 // terminated by the next slash ("/"), question mark ("?"), or number
96 // sign ("#") character, or by the end of the URI.
97 //
98 if (Char == ' ' || Char == '\r' || Char == '\n') {
99 return UrlParserStateMax;
100 }
101
102 //
103 // authority = [ userinfo "@" ] host [ ":" port ]
104 //
105 switch (State) {
106 case UrlParserUserInfo:
107 if (Char == '@') {
108 return UrlParserHostStart;
109 }
110 break;
111
112 case UrlParserHost:
113 case UrlParserHostStart:
114 if (Char == '[') {
115 return UrlParserHostIpv6;
116 }
117
118 if (Char == ':') {
119 return UrlParserPortStart;
120 }
121
122 return UrlParserHost;
123
124 case UrlParserHostIpv6:
125 if (Char == ']') {
126 *IsRightBracket = TRUE;
127 }
128
129 if (Char == ':' && *IsRightBracket) {
130 return UrlParserPortStart;
131 }
132 return UrlParserHostIpv6;
133
134 case UrlParserPort:
135 case UrlParserPortStart:
136 return UrlParserPort;
137
138 default:
139 break;
140 }
141
142 return State;
143 }
144
145 /**
146 This function parse the authority component of the input URL and update the parser.
147
148 @param[in] Url The pointer to a HTTP URL string.
149 @param[in] FoundAt TRUE if there is an at sign ('@') in the authority component.
150 @param[in, out] UrlParser Pointer to the buffer of the parse result.
151
152 @retval EFI_SUCCESS Successfully parse the authority.
153 @retval EFI_INVALID_PARAMETER The Url is invalid to parse the authority component.
154
155 **/
156 EFI_STATUS
NetHttpParseAuthority(IN CHAR8 * Url,IN BOOLEAN FoundAt,IN OUT HTTP_URL_PARSER * UrlParser)157 NetHttpParseAuthority (
158 IN CHAR8 *Url,
159 IN BOOLEAN FoundAt,
160 IN OUT HTTP_URL_PARSER *UrlParser
161 )
162 {
163 CHAR8 *Char;
164 CHAR8 *Authority;
165 UINT32 Length;
166 HTTP_URL_PARSE_STATE State;
167 UINT32 Field;
168 UINT32 OldField;
169 BOOLEAN IsrightBracket;
170
171 ASSERT ((UrlParser->FieldBitMap & BIT (HTTP_URI_FIELD_AUTHORITY)) != 0);
172
173 //
174 // authority = [ userinfo "@" ] host [ ":" port ]
175 //
176 if (FoundAt) {
177 State = UrlParserUserInfo;
178 } else {
179 State = UrlParserHost;
180 }
181
182 IsrightBracket = FALSE;
183 Field = HTTP_URI_FIELD_MAX;
184 OldField = Field;
185 Authority = Url + UrlParser->FieldData[HTTP_URI_FIELD_AUTHORITY].Offset;
186 Length = UrlParser->FieldData[HTTP_URI_FIELD_AUTHORITY].Length;
187 for (Char = Authority; Char < Authority + Length; Char++) {
188 State = NetHttpParseAuthorityChar (*Char, State, &IsrightBracket);
189 switch (State) {
190 case UrlParserStateMax:
191 return EFI_INVALID_PARAMETER;
192
193 case UrlParserHostStart:
194 case UrlParserPortStart:
195 continue;
196
197 case UrlParserUserInfo:
198 Field = HTTP_URI_FIELD_USERINFO;
199 break;
200
201 case UrlParserHost:
202 Field = HTTP_URI_FIELD_HOST;
203 break;
204
205 case UrlParserHostIpv6:
206 Field = HTTP_URI_FIELD_HOST;
207 break;
208
209 case UrlParserPort:
210 Field = HTTP_URI_FIELD_PORT;
211 break;
212
213 default:
214 ASSERT (FALSE);
215 }
216
217 //
218 // Field not changed, count the length.
219 //
220 ASSERT (Field < HTTP_URI_FIELD_MAX);
221 if (Field == OldField) {
222 UrlParser->FieldData[Field].Length++;
223 continue;
224 }
225
226 //
227 // New field start
228 //
229 UrlParser->FieldBitMap |= BIT (Field);
230 UrlParser->FieldData[Field].Offset = (UINT32) (Char - Url);
231 UrlParser->FieldData[Field].Length = 1;
232 OldField = Field;
233 }
234
235 return EFI_SUCCESS;
236 }
237
238 /**
239 This function return the updated state according to the input state and next character of a URL.
240
241 @param[in] Char Next character.
242 @param[in] State Current value of the parser state machine.
243
244 @return Updated state value.
245
246 **/
247 HTTP_URL_PARSE_STATE
NetHttpParseUrlChar(IN CHAR8 Char,IN HTTP_URL_PARSE_STATE State)248 NetHttpParseUrlChar (
249 IN CHAR8 Char,
250 IN HTTP_URL_PARSE_STATE State
251 )
252 {
253 if (Char == ' ' || Char == '\r' || Char == '\n') {
254 return UrlParserStateMax;
255 }
256
257 //
258 // http_URL = "http:" "//" host [ ":" port ] [ abs_path [ "?" query ]]
259 //
260 // Request-URI = "*" | absolute-URI | path-absolute | authority
261 //
262 // absolute-URI = scheme ":" hier-part [ "?" query ]
263 // path-absolute = "/" [ segment-nz *( "/" segment ) ]
264 // authority = [ userinfo "@" ] host [ ":" port ]
265 //
266 switch (State) {
267 case UrlParserUrlStart:
268 if (Char == '*' || Char == '/') {
269 return UrlParserPath;
270 }
271 return UrlParserScheme;
272
273 case UrlParserScheme:
274 if (Char == ':') {
275 return UrlParserSchemeColon;
276 }
277 break;
278
279 case UrlParserSchemeColon:
280 if (Char == '/') {
281 return UrlParserSchemeColonSlash;
282 }
283 break;
284
285 case UrlParserSchemeColonSlash:
286 if (Char == '/') {
287 return UrlParserSchemeColonSlashSlash;
288 }
289 break;
290
291 case UrlParserAtInAuthority:
292 if (Char == '@') {
293 return UrlParserStateMax;
294 }
295
296 case UrlParserAuthority:
297 case UrlParserSchemeColonSlashSlash:
298 if (Char == '@') {
299 return UrlParserAtInAuthority;
300 }
301 if (Char == '/') {
302 return UrlParserPath;
303 }
304 if (Char == '?') {
305 return UrlParserQueryStart;
306 }
307 if (Char == '#') {
308 return UrlParserFragmentStart;
309 }
310 return UrlParserAuthority;
311
312 case UrlParserPath:
313 if (Char == '?') {
314 return UrlParserQueryStart;
315 }
316 if (Char == '#') {
317 return UrlParserFragmentStart;
318 }
319 break;
320
321 case UrlParserQuery:
322 case UrlParserQueryStart:
323 if (Char == '#') {
324 return UrlParserFragmentStart;
325 }
326 return UrlParserQuery;
327
328 case UrlParserFragmentStart:
329 return UrlParserFragment;
330
331 default:
332 break;
333 }
334
335 return State;
336 }
337 /**
338 Create a URL parser for the input URL string.
339
340 This function will parse and dereference the input HTTP URL into it components. The original
341 content of the URL won't be modified and the result will be returned in UrlParser, which can
342 be used in other functions like NetHttpUrlGetHostName().
343
344 @param[in] Url The pointer to a HTTP URL string.
345 @param[in] Length Length of Url in bytes.
346 @param[in] IsConnectMethod Whether the Url is used in HTTP CONNECT method or not.
347 @param[out] UrlParser Pointer to the returned buffer to store the parse result.
348
349 @retval EFI_SUCCESS Successfully dereferenced the HTTP URL.
350 @retval EFI_INVALID_PARAMETER UrlParser is NULL or Url is not a valid HTTP URL.
351 @retval EFI_OUT_OF_RESOURCES Could not allocate needed resources.
352
353 **/
354 EFI_STATUS
355 EFIAPI
HttpParseUrl(IN CHAR8 * Url,IN UINT32 Length,IN BOOLEAN IsConnectMethod,OUT VOID ** UrlParser)356 HttpParseUrl (
357 IN CHAR8 *Url,
358 IN UINT32 Length,
359 IN BOOLEAN IsConnectMethod,
360 OUT VOID **UrlParser
361 )
362 {
363 HTTP_URL_PARSE_STATE State;
364 CHAR8 *Char;
365 UINT32 Field;
366 UINT32 OldField;
367 BOOLEAN FoundAt;
368 EFI_STATUS Status;
369 HTTP_URL_PARSER *Parser;
370
371 Parser = NULL;
372
373 if (Url == NULL || Length == 0 || UrlParser == NULL) {
374 return EFI_INVALID_PARAMETER;
375 }
376
377 Parser = AllocateZeroPool (sizeof (HTTP_URL_PARSER));
378 if (Parser == NULL) {
379 return EFI_OUT_OF_RESOURCES;
380 }
381
382 if (IsConnectMethod) {
383 //
384 // According to RFC 2616, the authority form is only used by the CONNECT method.
385 //
386 State = UrlParserAuthority;
387 } else {
388 State = UrlParserUrlStart;
389 }
390
391 Field = HTTP_URI_FIELD_MAX;
392 OldField = Field;
393 FoundAt = FALSE;
394 for (Char = Url; Char < Url + Length; Char++) {
395 //
396 // Update state machine according to next char.
397 //
398 State = NetHttpParseUrlChar (*Char, State);
399
400 switch (State) {
401 case UrlParserStateMax:
402 FreePool (Parser);
403 return EFI_INVALID_PARAMETER;
404
405 case UrlParserSchemeColon:
406 case UrlParserSchemeColonSlash:
407 case UrlParserSchemeColonSlashSlash:
408 case UrlParserQueryStart:
409 case UrlParserFragmentStart:
410 //
411 // Skip all the delimiting char: "://" "?" "@"
412 //
413 continue;
414
415 case UrlParserScheme:
416 Field = HTTP_URI_FIELD_SCHEME;
417 break;
418
419 case UrlParserAtInAuthority:
420 FoundAt = TRUE;
421 case UrlParserAuthority:
422 Field = HTTP_URI_FIELD_AUTHORITY;
423 break;
424
425 case UrlParserPath:
426 Field = HTTP_URI_FIELD_PATH;
427 break;
428
429 case UrlParserQuery:
430 Field = HTTP_URI_FIELD_QUERY;
431 break;
432
433 case UrlParserFragment:
434 Field = HTTP_URI_FIELD_FRAGMENT;
435 break;
436
437 default:
438 ASSERT (FALSE);
439 }
440
441 //
442 // Field not changed, count the length.
443 //
444 ASSERT (Field < HTTP_URI_FIELD_MAX);
445 if (Field == OldField) {
446 Parser->FieldData[Field].Length++;
447 continue;
448 }
449
450 //
451 // New field start
452 //
453 Parser->FieldBitMap |= BIT (Field);
454 Parser->FieldData[Field].Offset = (UINT32) (Char - Url);
455 Parser->FieldData[Field].Length = 1;
456 OldField = Field;
457 }
458
459 //
460 // If has authority component, continue to parse the username, host and port.
461 //
462 if ((Parser->FieldBitMap & BIT (HTTP_URI_FIELD_AUTHORITY)) != 0) {
463 Status = NetHttpParseAuthority (Url, FoundAt, Parser);
464 if (EFI_ERROR (Status)) {
465 FreePool (Parser);
466 return Status;
467 }
468 }
469
470 *UrlParser = Parser;
471 return EFI_SUCCESS;
472 }
473
474 /**
475 Get the Hostname from a HTTP URL.
476
477 This function will return the HostName according to the Url and previous parse result ,and
478 it is the caller's responsibility to free the buffer returned in *HostName.
479
480 @param[in] Url The pointer to a HTTP URL string.
481 @param[in] UrlParser URL Parse result returned by NetHttpParseUrl().
482 @param[out] HostName Pointer to a buffer to store the HostName.
483
484 @retval EFI_SUCCESS Successfully get the required component.
485 @retval EFI_INVALID_PARAMETER Uri is NULL or HostName is NULL or UrlParser is invalid.
486 @retval EFI_NOT_FOUND No hostName component in the URL.
487 @retval EFI_OUT_OF_RESOURCES Could not allocate needed resources.
488
489 **/
490 EFI_STATUS
491 EFIAPI
HttpUrlGetHostName(IN CHAR8 * Url,IN VOID * UrlParser,OUT CHAR8 ** HostName)492 HttpUrlGetHostName (
493 IN CHAR8 *Url,
494 IN VOID *UrlParser,
495 OUT CHAR8 **HostName
496 )
497 {
498 CHAR8 *Name;
499 EFI_STATUS Status;
500 UINT32 ResultLength;
501 HTTP_URL_PARSER *Parser;
502
503 if (Url == NULL || UrlParser == NULL || HostName == NULL) {
504 return EFI_INVALID_PARAMETER;
505 }
506
507 Parser = (HTTP_URL_PARSER *) UrlParser;
508
509 if ((Parser->FieldBitMap & BIT (HTTP_URI_FIELD_HOST)) == 0) {
510 return EFI_NOT_FOUND;
511 }
512
513 Name = AllocatePool (Parser->FieldData[HTTP_URI_FIELD_HOST].Length + 1);
514 if (Name == NULL) {
515 return EFI_OUT_OF_RESOURCES;
516 }
517
518 Status = UriPercentDecode (
519 Url + Parser->FieldData[HTTP_URI_FIELD_HOST].Offset,
520 Parser->FieldData[HTTP_URI_FIELD_HOST].Length,
521 Name,
522 &ResultLength
523 );
524 if (EFI_ERROR (Status)) {
525 FreePool (Name);
526 return Status;
527 }
528
529 Name[ResultLength] = '\0';
530 *HostName = Name;
531 return EFI_SUCCESS;
532 }
533
534
535 /**
536 Get the IPv4 address from a HTTP URL.
537
538 This function will return the IPv4 address according to the Url and previous parse result.
539
540 @param[in] Url The pointer to a HTTP URL string.
541 @param[in] UrlParser URL Parse result returned by NetHttpParseUrl().
542 @param[out] Ip4Address Pointer to a buffer to store the IP address.
543
544 @retval EFI_SUCCESS Successfully get the required component.
545 @retval EFI_INVALID_PARAMETER Uri is NULL or Ip4Address is NULL or UrlParser is invalid.
546 @retval EFI_NOT_FOUND No IPv4 address component in the URL.
547 @retval EFI_OUT_OF_RESOURCES Could not allocate needed resources.
548
549 **/
550 EFI_STATUS
551 EFIAPI
HttpUrlGetIp4(IN CHAR8 * Url,IN VOID * UrlParser,OUT EFI_IPv4_ADDRESS * Ip4Address)552 HttpUrlGetIp4 (
553 IN CHAR8 *Url,
554 IN VOID *UrlParser,
555 OUT EFI_IPv4_ADDRESS *Ip4Address
556 )
557 {
558 CHAR8 *Ip4String;
559 EFI_STATUS Status;
560 UINT32 ResultLength;
561 HTTP_URL_PARSER *Parser;
562
563 if (Url == NULL || UrlParser == NULL || Ip4Address == NULL) {
564 return EFI_INVALID_PARAMETER;
565 }
566
567 Parser = (HTTP_URL_PARSER *) UrlParser;
568
569 if ((Parser->FieldBitMap & BIT (HTTP_URI_FIELD_HOST)) == 0) {
570 return EFI_NOT_FOUND;
571 }
572
573 Ip4String = AllocatePool (Parser->FieldData[HTTP_URI_FIELD_HOST].Length + 1);
574 if (Ip4String == NULL) {
575 return EFI_OUT_OF_RESOURCES;
576 }
577
578 Status = UriPercentDecode (
579 Url + Parser->FieldData[HTTP_URI_FIELD_HOST].Offset,
580 Parser->FieldData[HTTP_URI_FIELD_HOST].Length,
581 Ip4String,
582 &ResultLength
583 );
584 if (EFI_ERROR (Status)) {
585 FreePool (Ip4String);
586 return Status;
587 }
588
589 Ip4String[ResultLength] = '\0';
590 Status = NetLibAsciiStrToIp4 (Ip4String, Ip4Address);
591 FreePool (Ip4String);
592
593 return Status;
594 }
595
596 /**
597 Get the IPv6 address from a HTTP URL.
598
599 This function will return the IPv6 address according to the Url and previous parse result.
600
601 @param[in] Url The pointer to a HTTP URL string.
602 @param[in] UrlParser URL Parse result returned by NetHttpParseUrl().
603 @param[out] Ip6Address Pointer to a buffer to store the IP address.
604
605 @retval EFI_SUCCESS Successfully get the required component.
606 @retval EFI_INVALID_PARAMETER Uri is NULL or Ip6Address is NULL or UrlParser is invalid.
607 @retval EFI_NOT_FOUND No IPv6 address component in the URL.
608 @retval EFI_OUT_OF_RESOURCES Could not allocate needed resources.
609
610 **/
611 EFI_STATUS
612 EFIAPI
HttpUrlGetIp6(IN CHAR8 * Url,IN VOID * UrlParser,OUT EFI_IPv6_ADDRESS * Ip6Address)613 HttpUrlGetIp6 (
614 IN CHAR8 *Url,
615 IN VOID *UrlParser,
616 OUT EFI_IPv6_ADDRESS *Ip6Address
617 )
618 {
619 CHAR8 *Ip6String;
620 CHAR8 *Ptr;
621 UINT32 Length;
622 EFI_STATUS Status;
623 UINT32 ResultLength;
624 HTTP_URL_PARSER *Parser;
625
626 if (Url == NULL || UrlParser == NULL || Ip6Address == NULL) {
627 return EFI_INVALID_PARAMETER;
628 }
629
630 Parser = (HTTP_URL_PARSER *) UrlParser;
631
632 if ((Parser->FieldBitMap & BIT (HTTP_URI_FIELD_HOST)) == 0) {
633 return EFI_NOT_FOUND;
634 }
635
636 //
637 // IP-literal = "[" ( IPv6address / IPvFuture ) "]"
638 //
639 Length = Parser->FieldData[HTTP_URI_FIELD_HOST].Length;
640 if (Length < 2) {
641 return EFI_INVALID_PARAMETER;
642 }
643
644 Ptr = Url + Parser->FieldData[HTTP_URI_FIELD_HOST].Offset;
645 if ((Ptr[0] != '[') || (Ptr[Length - 1] != ']')) {
646 return EFI_INVALID_PARAMETER;
647 }
648
649 Ip6String = AllocatePool (Length);
650 if (Ip6String == NULL) {
651 return EFI_OUT_OF_RESOURCES;
652 }
653
654 Status = UriPercentDecode (
655 Ptr + 1,
656 Length - 2,
657 Ip6String,
658 &ResultLength
659 );
660 if (EFI_ERROR (Status)) {
661 FreePool (Ip6String);
662 return Status;
663 }
664
665 Ip6String[ResultLength] = '\0';
666 Status = NetLibAsciiStrToIp6 (Ip6String, Ip6Address);
667 FreePool (Ip6String);
668
669 return Status;
670 }
671
672 /**
673 Get the port number from a HTTP URL.
674
675 This function will return the port number according to the Url and previous parse result.
676
677 @param[in] Url The pointer to a HTTP URL string.
678 @param[in] UrlParser URL Parse result returned by NetHttpParseUrl().
679 @param[out] Port Pointer to a buffer to store the port number.
680
681 @retval EFI_SUCCESS Successfully get the required component.
682 @retval EFI_INVALID_PARAMETER Uri is NULL or Port is NULL or UrlParser is invalid.
683 @retval EFI_NOT_FOUND No port number in the URL.
684 @retval EFI_OUT_OF_RESOURCES Could not allocate needed resources.
685
686 **/
687 EFI_STATUS
688 EFIAPI
HttpUrlGetPort(IN CHAR8 * Url,IN VOID * UrlParser,OUT UINT16 * Port)689 HttpUrlGetPort (
690 IN CHAR8 *Url,
691 IN VOID *UrlParser,
692 OUT UINT16 *Port
693 )
694 {
695 CHAR8 *PortString;
696 EFI_STATUS Status;
697 UINTN Index;
698 UINTN Data;
699 UINT32 ResultLength;
700 HTTP_URL_PARSER *Parser;
701
702 if (Url == NULL || UrlParser == NULL || Port == NULL) {
703 return EFI_INVALID_PARAMETER;
704 }
705
706 *Port = 0;
707 Index = 0;
708
709 Parser = (HTTP_URL_PARSER *) UrlParser;
710
711 if ((Parser->FieldBitMap & BIT (HTTP_URI_FIELD_PORT)) == 0) {
712 return EFI_NOT_FOUND;
713 }
714
715 PortString = AllocatePool (Parser->FieldData[HTTP_URI_FIELD_PORT].Length + 1);
716 if (PortString == NULL) {
717 return EFI_OUT_OF_RESOURCES;
718 }
719
720 Status = UriPercentDecode (
721 Url + Parser->FieldData[HTTP_URI_FIELD_PORT].Offset,
722 Parser->FieldData[HTTP_URI_FIELD_PORT].Length,
723 PortString,
724 &ResultLength
725 );
726 if (EFI_ERROR (Status)) {
727 goto ON_EXIT;
728 }
729
730 PortString[ResultLength] = '\0';
731
732 while (Index < ResultLength) {
733 if (!NET_IS_DIGIT (PortString[Index])) {
734 Status = EFI_INVALID_PARAMETER;
735 goto ON_EXIT;
736 }
737 Index ++;
738 }
739
740 Status = AsciiStrDecimalToUintnS (Url + Parser->FieldData[HTTP_URI_FIELD_PORT].Offset, (CHAR8 **) NULL, &Data);
741
742 if (Data > HTTP_URI_PORT_MAX_NUM) {
743 Status = EFI_INVALID_PARAMETER;
744 goto ON_EXIT;
745 }
746
747 *Port = (UINT16) Data;
748
749 ON_EXIT:
750 FreePool (PortString);
751 return Status;
752 }
753
754 /**
755 Get the Path from a HTTP URL.
756
757 This function will return the Path according to the Url and previous parse result,and
758 it is the caller's responsibility to free the buffer returned in *Path.
759
760 @param[in] Url The pointer to a HTTP URL string.
761 @param[in] UrlParser URL Parse result returned by NetHttpParseUrl().
762 @param[out] Path Pointer to a buffer to store the Path.
763
764 @retval EFI_SUCCESS Successfully get the required component.
765 @retval EFI_INVALID_PARAMETER Uri is NULL or HostName is NULL or UrlParser is invalid.
766 @retval EFI_NOT_FOUND No hostName component in the URL.
767 @retval EFI_OUT_OF_RESOURCES Could not allocate needed resources.
768
769 **/
770 EFI_STATUS
771 EFIAPI
HttpUrlGetPath(IN CHAR8 * Url,IN VOID * UrlParser,OUT CHAR8 ** Path)772 HttpUrlGetPath (
773 IN CHAR8 *Url,
774 IN VOID *UrlParser,
775 OUT CHAR8 **Path
776 )
777 {
778 CHAR8 *PathStr;
779 EFI_STATUS Status;
780 UINT32 ResultLength;
781 HTTP_URL_PARSER *Parser;
782
783 if (Url == NULL || UrlParser == NULL || Path == NULL) {
784 return EFI_INVALID_PARAMETER;
785 }
786
787 Parser = (HTTP_URL_PARSER *) UrlParser;
788
789 if ((Parser->FieldBitMap & BIT (HTTP_URI_FIELD_PATH)) == 0) {
790 return EFI_NOT_FOUND;
791 }
792
793 PathStr = AllocatePool (Parser->FieldData[HTTP_URI_FIELD_PATH].Length + 1);
794 if (PathStr == NULL) {
795 return EFI_OUT_OF_RESOURCES;
796 }
797
798 Status = UriPercentDecode (
799 Url + Parser->FieldData[HTTP_URI_FIELD_PATH].Offset,
800 Parser->FieldData[HTTP_URI_FIELD_PATH].Length,
801 PathStr,
802 &ResultLength
803 );
804 if (EFI_ERROR (Status)) {
805 FreePool (PathStr);
806 return Status;
807 }
808
809 PathStr[ResultLength] = '\0';
810 *Path = PathStr;
811 return EFI_SUCCESS;
812 }
813
814 /**
815 Release the resource of the URL parser.
816
817 @param[in] UrlParser Pointer to the parser.
818
819 **/
820 VOID
821 EFIAPI
HttpUrlFreeParser(IN VOID * UrlParser)822 HttpUrlFreeParser (
823 IN VOID *UrlParser
824 )
825 {
826 FreePool (UrlParser);
827 }
828
829 /**
830 Find a specified header field according to the field name.
831
832 @param[in] HeaderCount Number of HTTP header structures in Headers list.
833 @param[in] Headers Array containing list of HTTP headers.
834 @param[in] FieldName Null terminated string which describes a field name.
835
836 @return Pointer to the found header or NULL.
837
838 **/
839 EFI_HTTP_HEADER *
840 EFIAPI
HttpFindHeader(IN UINTN HeaderCount,IN EFI_HTTP_HEADER * Headers,IN CHAR8 * FieldName)841 HttpFindHeader (
842 IN UINTN HeaderCount,
843 IN EFI_HTTP_HEADER *Headers,
844 IN CHAR8 *FieldName
845 )
846 {
847 UINTN Index;
848
849 if (HeaderCount == 0 || Headers == NULL || FieldName == NULL) {
850 return NULL;
851 }
852
853 for (Index = 0; Index < HeaderCount; Index++){
854 //
855 // Field names are case-insensitive (RFC 2616).
856 //
857 if (AsciiStriCmp (Headers[Index].FieldName, FieldName) == 0) {
858 return &Headers[Index];
859 }
860 }
861 return NULL;
862 }
863
864 typedef enum {
865 BodyParserBodyStart,
866 BodyParserBodyIdentity,
867 BodyParserChunkSizeStart,
868 BodyParserChunkSize,
869 BodyParserChunkSizeEndCR,
870 BodyParserChunkExtStart,
871 BodyParserChunkDataStart,
872 BodyParserChunkDataEnd,
873 BodyParserChunkDataEndCR,
874 BodyParserTrailer,
875 BodyParserLastCRLF,
876 BodyParserLastCRLFEnd,
877 BodyParserComplete,
878 BodyParserStateMax
879 } HTTP_BODY_PARSE_STATE;
880
881 typedef struct {
882 BOOLEAN IgnoreBody; // "MUST NOT" include a message-body
883 BOOLEAN IsChunked; // "chunked" transfer-coding.
884 BOOLEAN ContentLengthIsValid;
885 UINTN ContentLength; // Entity length (not the message-body length), invalid until ContentLengthIsValid is TRUE
886
887 HTTP_BODY_PARSER_CALLBACK Callback;
888 VOID *Context;
889 UINTN ParsedBodyLength;
890 HTTP_BODY_PARSE_STATE State;
891 UINTN CurrentChunkSize;
892 UINTN CurrentChunkParsedSize;
893 } HTTP_BODY_PARSER;
894
895 /**
896 Convert an hexadecimal char to a value of type UINTN.
897
898 @param[in] Char Ascii character.
899
900 @return Value translated from Char.
901
902 **/
903 UINTN
HttpIoHexCharToUintn(IN CHAR8 Char)904 HttpIoHexCharToUintn (
905 IN CHAR8 Char
906 )
907 {
908 if (Char >= '0' && Char <= '9') {
909 return Char - '0';
910 }
911
912 return (10 + AsciiCharToUpper (Char) - 'A');
913 }
914
915 /**
916 Get the value of the content length if there is a "Content-Length" header.
917
918 @param[in] HeaderCount Number of HTTP header structures in Headers.
919 @param[in] Headers Array containing list of HTTP headers.
920 @param[out] ContentLength Pointer to save the value of the content length.
921
922 @retval EFI_SUCCESS Successfully get the content length.
923 @retval EFI_NOT_FOUND No "Content-Length" header in the Headers.
924
925 **/
926 EFI_STATUS
HttpIoParseContentLengthHeader(IN UINTN HeaderCount,IN EFI_HTTP_HEADER * Headers,OUT UINTN * ContentLength)927 HttpIoParseContentLengthHeader (
928 IN UINTN HeaderCount,
929 IN EFI_HTTP_HEADER *Headers,
930 OUT UINTN *ContentLength
931 )
932 {
933 EFI_HTTP_HEADER *Header;
934
935 Header = HttpFindHeader (HeaderCount, Headers, HTTP_HEADER_CONTENT_LENGTH);
936 if (Header == NULL) {
937 return EFI_NOT_FOUND;
938 }
939
940 return AsciiStrDecimalToUintnS (Header->FieldValue, (CHAR8 **) NULL, ContentLength);
941 }
942
943 /**
944
945 Check whether the HTTP message is using the "chunked" transfer-coding.
946
947 @param[in] HeaderCount Number of HTTP header structures in Headers.
948 @param[in] Headers Array containing list of HTTP headers.
949
950 @return The message is "chunked" transfer-coding (TRUE) or not (FALSE).
951
952 **/
953 BOOLEAN
HttpIoIsChunked(IN UINTN HeaderCount,IN EFI_HTTP_HEADER * Headers)954 HttpIoIsChunked (
955 IN UINTN HeaderCount,
956 IN EFI_HTTP_HEADER *Headers
957 )
958 {
959 EFI_HTTP_HEADER *Header;
960
961
962 Header = HttpFindHeader (HeaderCount, Headers, HTTP_HEADER_TRANSFER_ENCODING);
963 if (Header == NULL) {
964 return FALSE;
965 }
966
967 if (AsciiStriCmp (Header->FieldValue, "identity") != 0) {
968 return TRUE;
969 }
970
971 return FALSE;
972 }
973
974 /**
975 Check whether the HTTP message should have a message-body.
976
977 @param[in] Method The HTTP method (e.g. GET, POST) for this HTTP message.
978 @param[in] StatusCode Response status code returned by the remote host.
979
980 @return The message should have a message-body (FALSE) or not (TRUE).
981
982 **/
983 BOOLEAN
HttpIoNoMessageBody(IN EFI_HTTP_METHOD Method,IN EFI_HTTP_STATUS_CODE StatusCode)984 HttpIoNoMessageBody (
985 IN EFI_HTTP_METHOD Method,
986 IN EFI_HTTP_STATUS_CODE StatusCode
987 )
988 {
989 //
990 // RFC 2616:
991 // All responses to the HEAD request method
992 // MUST NOT include a message-body, even though the presence of entity-
993 // header fields might lead one to believe they do. All 1xx
994 // (informational), 204 (no content), and 304 (not modified) responses
995 // MUST NOT include a message-body. All other responses do include a
996 // message-body, although it MAY be of zero length.
997 //
998 if (Method == HttpMethodHead) {
999 return TRUE;
1000 }
1001
1002 if ((StatusCode == HTTP_STATUS_100_CONTINUE) ||
1003 (StatusCode == HTTP_STATUS_101_SWITCHING_PROTOCOLS) ||
1004 (StatusCode == HTTP_STATUS_204_NO_CONTENT) ||
1005 (StatusCode == HTTP_STATUS_304_NOT_MODIFIED))
1006 {
1007 return TRUE;
1008 }
1009
1010 return FALSE;
1011 }
1012
1013 /**
1014 Initialize a HTTP message-body parser.
1015
1016 This function will create and initialize a HTTP message parser according to caller provided HTTP message
1017 header information. It is the caller's responsibility to free the buffer returned in *UrlParser by HttpFreeMsgParser().
1018
1019 @param[in] Method The HTTP method (e.g. GET, POST) for this HTTP message.
1020 @param[in] StatusCode Response status code returned by the remote host.
1021 @param[in] HeaderCount Number of HTTP header structures in Headers.
1022 @param[in] Headers Array containing list of HTTP headers.
1023 @param[in] Callback Callback function that is invoked when parsing the HTTP message-body,
1024 set to NULL to ignore all events.
1025 @param[in] Context Pointer to the context that will be passed to Callback.
1026 @param[out] MsgParser Pointer to the returned buffer to store the message parser.
1027
1028 @retval EFI_SUCCESS Successfully initialized the parser.
1029 @retval EFI_OUT_OF_RESOURCES Could not allocate needed resources.
1030 @retval EFI_INVALID_PARAMETER MsgParser is NULL or HeaderCount is not NULL but Headers is NULL.
1031 @retval Others Failed to initialize the parser.
1032
1033 **/
1034 EFI_STATUS
1035 EFIAPI
HttpInitMsgParser(IN EFI_HTTP_METHOD Method,IN EFI_HTTP_STATUS_CODE StatusCode,IN UINTN HeaderCount,IN EFI_HTTP_HEADER * Headers,IN HTTP_BODY_PARSER_CALLBACK Callback,IN VOID * Context,OUT VOID ** MsgParser)1036 HttpInitMsgParser (
1037 IN EFI_HTTP_METHOD Method,
1038 IN EFI_HTTP_STATUS_CODE StatusCode,
1039 IN UINTN HeaderCount,
1040 IN EFI_HTTP_HEADER *Headers,
1041 IN HTTP_BODY_PARSER_CALLBACK Callback,
1042 IN VOID *Context,
1043 OUT VOID **MsgParser
1044 )
1045 {
1046 EFI_STATUS Status;
1047 HTTP_BODY_PARSER *Parser;
1048
1049 if (HeaderCount != 0 && Headers == NULL) {
1050 return EFI_INVALID_PARAMETER;
1051 }
1052
1053 if (MsgParser == NULL) {
1054 return EFI_INVALID_PARAMETER;
1055 }
1056
1057 Parser = AllocateZeroPool (sizeof (HTTP_BODY_PARSER));
1058 if (Parser == NULL) {
1059 return EFI_OUT_OF_RESOURCES;
1060 }
1061
1062 Parser->State = BodyParserBodyStart;
1063
1064 //
1065 // Determine the message length according to RFC 2616.
1066 // 1. Check whether the message "MUST NOT" have a message-body.
1067 //
1068 Parser->IgnoreBody = HttpIoNoMessageBody (Method, StatusCode);
1069 //
1070 // 2. Check whether the message using "chunked" transfer-coding.
1071 //
1072 Parser->IsChunked = HttpIoIsChunked (HeaderCount, Headers);
1073 //
1074 // 3. Check whether the message has a Content-Length header field.
1075 //
1076 Status = HttpIoParseContentLengthHeader (HeaderCount, Headers, &Parser->ContentLength);
1077 if (!EFI_ERROR (Status)) {
1078 Parser->ContentLengthIsValid = TRUE;
1079 }
1080 //
1081 // 4. Range header is not supported now, so we won't meet media type "multipart/byteranges".
1082 // 5. By server closing the connection
1083 //
1084
1085 //
1086 // Set state to skip body parser if the message shouldn't have a message body.
1087 //
1088 if (Parser->IgnoreBody) {
1089 Parser->State = BodyParserComplete;
1090 } else {
1091 Parser->Callback = Callback;
1092 Parser->Context = Context;
1093 }
1094
1095 *MsgParser = Parser;
1096 return EFI_SUCCESS;
1097 }
1098
1099 /**
1100 Parse message body.
1101
1102 Parse BodyLength of message-body. This function can be called repeatedly to parse the message-body partially.
1103
1104 @param[in, out] MsgParser Pointer to the message parser.
1105 @param[in] BodyLength Length in bytes of the Body.
1106 @param[in] Body Pointer to the buffer of the message-body to be parsed.
1107
1108 @retval EFI_SUCCESS Successfully parse the message-body.
1109 @retval EFI_INVALID_PARAMETER MsgParser is NULL or Body is NULL or BodyLength is 0.
1110 @retval EFI_ABORTED Operation aborted.
1111 @retval Other Error happened while parsing message body.
1112
1113 **/
1114 EFI_STATUS
1115 EFIAPI
HttpParseMessageBody(IN OUT VOID * MsgParser,IN UINTN BodyLength,IN CHAR8 * Body)1116 HttpParseMessageBody (
1117 IN OUT VOID *MsgParser,
1118 IN UINTN BodyLength,
1119 IN CHAR8 *Body
1120 )
1121 {
1122 CHAR8 *Char;
1123 UINTN RemainderLengthInThis;
1124 UINTN LengthForCallback;
1125 EFI_STATUS Status;
1126 HTTP_BODY_PARSER *Parser;
1127
1128 if (BodyLength == 0 || Body == NULL) {
1129 return EFI_INVALID_PARAMETER;
1130 }
1131
1132 if (MsgParser == NULL) {
1133 return EFI_INVALID_PARAMETER;
1134 }
1135
1136 Parser = (HTTP_BODY_PARSER *) MsgParser;
1137
1138 if (Parser->IgnoreBody) {
1139 Parser->State = BodyParserComplete;
1140 if (Parser->Callback != NULL) {
1141 Status = Parser->Callback (
1142 BodyParseEventOnComplete,
1143 Body,
1144 0,
1145 Parser->Context
1146 );
1147 if (EFI_ERROR (Status)) {
1148 return Status;
1149 }
1150 }
1151 return EFI_SUCCESS;
1152 }
1153
1154 if (Parser->State == BodyParserBodyStart) {
1155 Parser->ParsedBodyLength = 0;
1156 if (Parser->IsChunked) {
1157 Parser->State = BodyParserChunkSizeStart;
1158 } else {
1159 Parser->State = BodyParserBodyIdentity;
1160 }
1161 }
1162
1163 //
1164 // The message body might be truncated in anywhere, so we need to parse is byte-by-byte.
1165 //
1166 for (Char = Body; Char < Body + BodyLength; ) {
1167
1168 switch (Parser->State) {
1169 case BodyParserStateMax:
1170 return EFI_ABORTED;
1171
1172 case BodyParserBodyIdentity:
1173 //
1174 // Identity transfer-coding, just notify user to save the body data.
1175 //
1176 if (Parser->Callback != NULL) {
1177 Status = Parser->Callback (
1178 BodyParseEventOnData,
1179 Char,
1180 MIN (BodyLength, Parser->ContentLength - Parser->ParsedBodyLength),
1181 Parser->Context
1182 );
1183 if (EFI_ERROR (Status)) {
1184 return Status;
1185 }
1186 }
1187 Char += MIN (BodyLength, Parser->ContentLength - Parser->ParsedBodyLength);
1188 Parser->ParsedBodyLength += MIN (BodyLength, Parser->ContentLength - Parser->ParsedBodyLength);
1189 if (Parser->ParsedBodyLength == Parser->ContentLength) {
1190 Parser->State = BodyParserComplete;
1191 if (Parser->Callback != NULL) {
1192 Status = Parser->Callback (
1193 BodyParseEventOnComplete,
1194 Char,
1195 0,
1196 Parser->Context
1197 );
1198 if (EFI_ERROR (Status)) {
1199 return Status;
1200 }
1201 }
1202 }
1203 break;
1204
1205 case BodyParserChunkSizeStart:
1206 //
1207 // First byte of chunk-size, the chunk-size might be truncated.
1208 //
1209 Parser->CurrentChunkSize = 0;
1210 Parser->State = BodyParserChunkSize;
1211 case BodyParserChunkSize:
1212 if (!NET_IS_HEX_CHAR (*Char)) {
1213 if (*Char == ';') {
1214 Parser->State = BodyParserChunkExtStart;
1215 Char++;
1216 } else if (*Char == '\r') {
1217 Parser->State = BodyParserChunkSizeEndCR;
1218 Char++;
1219 } else {
1220 Parser->State = BodyParserStateMax;
1221 }
1222 break;
1223 }
1224
1225 if (Parser->CurrentChunkSize > (((~((UINTN) 0)) - 16) / 16)) {
1226 return EFI_INVALID_PARAMETER;
1227 }
1228 Parser->CurrentChunkSize = Parser->CurrentChunkSize * 16 + HttpIoHexCharToUintn (*Char);
1229 Char++;
1230 break;
1231
1232 case BodyParserChunkExtStart:
1233 //
1234 // Ignore all the chunk extensions.
1235 //
1236 if (*Char == '\r') {
1237 Parser->State = BodyParserChunkSizeEndCR;
1238 }
1239 Char++;
1240 break;
1241
1242 case BodyParserChunkSizeEndCR:
1243 if (*Char != '\n') {
1244 Parser->State = BodyParserStateMax;
1245 break;
1246 }
1247 Char++;
1248 if (Parser->CurrentChunkSize == 0) {
1249 //
1250 // The last chunk has been parsed and now assumed the state
1251 // of HttpBodyParse is ParserLastCRLF. So it need to decide
1252 // whether the rest message is trailer or last CRLF in the next round.
1253 //
1254 Parser->ContentLengthIsValid = TRUE;
1255 Parser->State = BodyParserLastCRLF;
1256 break;
1257 }
1258 Parser->State = BodyParserChunkDataStart;
1259 Parser->CurrentChunkParsedSize = 0;
1260 break;
1261
1262 case BodyParserLastCRLF:
1263 //
1264 // Judge the byte is belong to the Last CRLF or trailer, and then
1265 // configure the state of HttpBodyParse to corresponding state.
1266 //
1267 if (*Char == '\r') {
1268 Char++;
1269 Parser->State = BodyParserLastCRLFEnd;
1270 break;
1271 } else {
1272 Parser->State = BodyParserTrailer;
1273 break;
1274 }
1275
1276 case BodyParserLastCRLFEnd:
1277 if (*Char == '\n') {
1278 Parser->State = BodyParserComplete;
1279 Char++;
1280 if (Parser->Callback != NULL) {
1281 Status = Parser->Callback (
1282 BodyParseEventOnComplete,
1283 Char,
1284 0,
1285 Parser->Context
1286 );
1287 if (EFI_ERROR (Status)) {
1288 return Status;
1289 }
1290 }
1291 break;
1292 } else {
1293 Parser->State = BodyParserStateMax;
1294 break;
1295 }
1296
1297 case BodyParserTrailer:
1298 if (*Char == '\r') {
1299 Parser->State = BodyParserChunkSizeEndCR;
1300 }
1301 Char++;
1302 break;
1303
1304 case BodyParserChunkDataStart:
1305 //
1306 // First byte of chunk-data, the chunk data also might be truncated.
1307 //
1308 RemainderLengthInThis = BodyLength - (Char - Body);
1309 LengthForCallback = MIN (Parser->CurrentChunkSize - Parser->CurrentChunkParsedSize, RemainderLengthInThis);
1310 if (Parser->Callback != NULL) {
1311 Status = Parser->Callback (
1312 BodyParseEventOnData,
1313 Char,
1314 LengthForCallback,
1315 Parser->Context
1316 );
1317 if (EFI_ERROR (Status)) {
1318 return Status;
1319 }
1320 }
1321 Char += LengthForCallback;
1322 Parser->ContentLength += LengthForCallback;
1323 Parser->CurrentChunkParsedSize += LengthForCallback;
1324 if (Parser->CurrentChunkParsedSize == Parser->CurrentChunkSize) {
1325 Parser->State = BodyParserChunkDataEnd;
1326 }
1327 break;
1328
1329 case BodyParserChunkDataEnd:
1330 if (*Char == '\r') {
1331 Parser->State = BodyParserChunkDataEndCR;
1332 } else {
1333 Parser->State = BodyParserStateMax;
1334 }
1335 Char++;
1336 break;
1337
1338 case BodyParserChunkDataEndCR:
1339 if (*Char != '\n') {
1340 Parser->State = BodyParserStateMax;
1341 break;
1342 }
1343 Char++;
1344 Parser->State = BodyParserChunkSizeStart;
1345 break;
1346
1347 default:
1348 break;
1349 }
1350
1351 }
1352
1353 if (Parser->State == BodyParserStateMax) {
1354 return EFI_ABORTED;
1355 }
1356
1357 return EFI_SUCCESS;
1358 }
1359
1360 /**
1361 Check whether the message-body is complete or not.
1362
1363 @param[in] MsgParser Pointer to the message parser.
1364
1365 @retval TRUE Message-body is complete.
1366 @retval FALSE Message-body is not complete.
1367
1368 **/
1369 BOOLEAN
1370 EFIAPI
HttpIsMessageComplete(IN VOID * MsgParser)1371 HttpIsMessageComplete (
1372 IN VOID *MsgParser
1373 )
1374 {
1375 HTTP_BODY_PARSER *Parser;
1376
1377 if (MsgParser == NULL) {
1378 return FALSE;
1379 }
1380
1381 Parser = (HTTP_BODY_PARSER *) MsgParser;
1382
1383 if (Parser->State == BodyParserComplete) {
1384 return TRUE;
1385 }
1386 return FALSE;
1387 }
1388
1389 /**
1390 Get the content length of the entity.
1391
1392 Note that in trunk transfer, the entity length is not valid until the whole message body is received.
1393
1394 @param[in] MsgParser Pointer to the message parser.
1395 @param[out] ContentLength Pointer to store the length of the entity.
1396
1397 @retval EFI_SUCCESS Successfully to get the entity length.
1398 @retval EFI_NOT_READY Entity length is not valid yet.
1399 @retval EFI_INVALID_PARAMETER MsgParser is NULL or ContentLength is NULL.
1400
1401 **/
1402 EFI_STATUS
1403 EFIAPI
HttpGetEntityLength(IN VOID * MsgParser,OUT UINTN * ContentLength)1404 HttpGetEntityLength (
1405 IN VOID *MsgParser,
1406 OUT UINTN *ContentLength
1407 )
1408 {
1409 HTTP_BODY_PARSER *Parser;
1410
1411 if (MsgParser == NULL || ContentLength == NULL) {
1412 return EFI_INVALID_PARAMETER;
1413 }
1414
1415 Parser = (HTTP_BODY_PARSER *) MsgParser;
1416
1417 if (!Parser->ContentLengthIsValid) {
1418 return EFI_NOT_READY;
1419 }
1420
1421 *ContentLength = Parser->ContentLength;
1422 return EFI_SUCCESS;
1423 }
1424
1425 /**
1426 Release the resource of the message parser.
1427
1428 @param[in] MsgParser Pointer to the message parser.
1429
1430 **/
1431 VOID
1432 EFIAPI
HttpFreeMsgParser(IN VOID * MsgParser)1433 HttpFreeMsgParser (
1434 IN VOID *MsgParser
1435 )
1436 {
1437 FreePool (MsgParser);
1438 }
1439
1440
1441 /**
1442 Get the next string, which is distinguished by specified separator.
1443
1444 @param[in] String Pointer to the string.
1445 @param[in] Separator Specified separator used to distinguish where is the beginning
1446 of next string.
1447
1448 @return Pointer to the next string.
1449 @return NULL if not find or String is NULL.
1450
1451 **/
1452 CHAR8 *
AsciiStrGetNextToken(IN CONST CHAR8 * String,IN CHAR8 Separator)1453 AsciiStrGetNextToken (
1454 IN CONST CHAR8 *String,
1455 IN CHAR8 Separator
1456 )
1457 {
1458 CONST CHAR8 *Token;
1459
1460 Token = String;
1461 while (TRUE) {
1462 if (*Token == 0) {
1463 return NULL;
1464 }
1465 if (*Token == Separator) {
1466 return (CHAR8 *)(Token + 1);
1467 }
1468 Token++;
1469 }
1470 }
1471
1472 /**
1473 Set FieldName and FieldValue into specified HttpHeader.
1474
1475 @param[in,out] HttpHeader Specified HttpHeader.
1476 @param[in] FieldName FieldName of this HttpHeader, a NULL terminated ASCII string.
1477 @param[in] FieldValue FieldValue of this HttpHeader, a NULL terminated ASCII string.
1478
1479
1480 @retval EFI_SUCCESS The FieldName and FieldValue are set into HttpHeader successfully.
1481 @retval EFI_INVALID_PARAMETER The parameter is invalid.
1482 @retval EFI_OUT_OF_RESOURCES Failed to allocate resources.
1483
1484 **/
1485 EFI_STATUS
1486 EFIAPI
HttpSetFieldNameAndValue(IN OUT EFI_HTTP_HEADER * HttpHeader,IN CONST CHAR8 * FieldName,IN CONST CHAR8 * FieldValue)1487 HttpSetFieldNameAndValue (
1488 IN OUT EFI_HTTP_HEADER *HttpHeader,
1489 IN CONST CHAR8 *FieldName,
1490 IN CONST CHAR8 *FieldValue
1491 )
1492 {
1493 UINTN FieldNameSize;
1494 UINTN FieldValueSize;
1495
1496 if (HttpHeader == NULL || FieldName == NULL || FieldValue == NULL) {
1497 return EFI_INVALID_PARAMETER;
1498 }
1499
1500 if (HttpHeader->FieldName != NULL) {
1501 FreePool (HttpHeader->FieldName);
1502 }
1503 if (HttpHeader->FieldValue != NULL) {
1504 FreePool (HttpHeader->FieldValue);
1505 }
1506
1507 FieldNameSize = AsciiStrSize (FieldName);
1508 HttpHeader->FieldName = AllocateZeroPool (FieldNameSize);
1509 if (HttpHeader->FieldName == NULL) {
1510 return EFI_OUT_OF_RESOURCES;
1511 }
1512 CopyMem (HttpHeader->FieldName, FieldName, FieldNameSize);
1513 HttpHeader->FieldName[FieldNameSize - 1] = 0;
1514
1515 FieldValueSize = AsciiStrSize (FieldValue);
1516 HttpHeader->FieldValue = AllocateZeroPool (FieldValueSize);
1517 if (HttpHeader->FieldValue == NULL) {
1518 FreePool (HttpHeader->FieldName);
1519 return EFI_OUT_OF_RESOURCES;
1520 }
1521 CopyMem (HttpHeader->FieldValue, FieldValue, FieldValueSize);
1522 HttpHeader->FieldValue[FieldValueSize - 1] = 0;
1523
1524 return EFI_SUCCESS;
1525 }
1526
1527 /**
1528 Get one key/value header pair from the raw string.
1529
1530 @param[in] String Pointer to the raw string.
1531 @param[out] FieldName Points directly to field name within 'HttpHeader'.
1532 @param[out] FieldValue Points directly to field value within 'HttpHeader'.
1533
1534 @return Pointer to the next raw string.
1535 @return NULL if no key/value header pair from this raw string.
1536
1537 **/
1538 CHAR8 *
1539 EFIAPI
HttpGetFieldNameAndValue(IN CHAR8 * String,OUT CHAR8 ** FieldName,OUT CHAR8 ** FieldValue)1540 HttpGetFieldNameAndValue (
1541 IN CHAR8 *String,
1542 OUT CHAR8 **FieldName,
1543 OUT CHAR8 **FieldValue
1544 )
1545 {
1546 CHAR8 *FieldNameStr;
1547 CHAR8 *FieldValueStr;
1548 CHAR8 *StrPtr;
1549 CHAR8 *EndofHeader;
1550
1551 if (String == NULL || FieldName == NULL || FieldValue == NULL) {
1552 return NULL;
1553 }
1554
1555 *FieldName = NULL;
1556 *FieldValue = NULL;
1557 FieldNameStr = NULL;
1558 FieldValueStr = NULL;
1559 StrPtr = NULL;
1560 EndofHeader = NULL;
1561
1562
1563 //
1564 // Check whether the raw HTTP header string is valid or not.
1565 //
1566 EndofHeader = AsciiStrStr (String, "\r\n\r\n");
1567 if (EndofHeader == NULL) {
1568 return NULL;
1569 }
1570
1571 //
1572 // Each header field consists of a name followed by a colon (":") and the field value.
1573 // The field value MAY be preceded by any amount of LWS, though a single SP is preferred.
1574 //
1575 // message-header = field-name ":" [ field-value ]
1576 // field-name = token
1577 // field-value = *( field-content | LWS )
1578 //
1579 // Note: "*(element)" allows any number element, including zero; "1*(element)" requires at least one element.
1580 // [element] means element is optional.
1581 // LWS = [CRLF] 1*(SP|HT), it can be ' ' or '\t' or '\r\n ' or '\r\n\t'.
1582 // CRLF = '\r\n'.
1583 // SP = ' '.
1584 // HT = '\t' (Tab).
1585 //
1586 FieldNameStr = String;
1587 FieldValueStr = AsciiStrGetNextToken (FieldNameStr, ':');
1588 if (FieldValueStr == NULL) {
1589 return NULL;
1590 }
1591
1592 //
1593 // Replace ':' with 0, then FieldName has been retrived from String.
1594 //
1595 *(FieldValueStr - 1) = 0;
1596
1597 //
1598 // Handle FieldValueStr, skip all the preceded LWS.
1599 //
1600 while (TRUE) {
1601 if (*FieldValueStr == ' ' || *FieldValueStr == '\t') {
1602 //
1603 // Boundary condition check.
1604 //
1605 if ((UINTN) EndofHeader - (UINTN) FieldValueStr < 1) {
1606 //
1607 // Wrong String format!
1608 //
1609 return NULL;
1610 }
1611
1612 FieldValueStr ++;
1613 } else if (*FieldValueStr == '\r') {
1614 //
1615 // Boundary condition check.
1616 //
1617 if ((UINTN) EndofHeader - (UINTN) FieldValueStr < 3) {
1618 //
1619 // No more preceded LWS, so break here.
1620 //
1621 break;
1622 }
1623
1624 if (*(FieldValueStr + 1) == '\n' ) {
1625 if (*(FieldValueStr + 2) == ' ' || *(FieldValueStr + 2) == '\t') {
1626 FieldValueStr = FieldValueStr + 3;
1627 } else {
1628 //
1629 // No more preceded LWS, so break here.
1630 //
1631 break;
1632 }
1633 } else {
1634 //
1635 // Wrong String format!
1636 //
1637 return NULL;
1638 }
1639 } else {
1640 //
1641 // No more preceded LWS, so break here.
1642 //
1643 break;
1644 }
1645 }
1646
1647 StrPtr = FieldValueStr;
1648 do {
1649 //
1650 // Handle the LWS within the field value.
1651 //
1652 StrPtr = AsciiStrGetNextToken (StrPtr, '\r');
1653 if (StrPtr == NULL || *StrPtr != '\n') {
1654 //
1655 // Wrong String format!
1656 //
1657 return NULL;
1658 }
1659
1660 StrPtr++;
1661 } while (*StrPtr == ' ' || *StrPtr == '\t');
1662
1663 //
1664 // Replace '\r' with 0
1665 //
1666 *(StrPtr - 2) = 0;
1667
1668 //
1669 // Get FieldName and FieldValue.
1670 //
1671 *FieldName = FieldNameStr;
1672 *FieldValue = FieldValueStr;
1673
1674 return StrPtr;
1675 }
1676
1677 /**
1678 Free existing HeaderFields.
1679
1680 @param[in] HeaderFields Pointer to array of key/value header pairs waitting for free.
1681 @param[in] FieldCount The number of header pairs in HeaderFields.
1682
1683 **/
1684 VOID
1685 EFIAPI
HttpFreeHeaderFields(IN EFI_HTTP_HEADER * HeaderFields,IN UINTN FieldCount)1686 HttpFreeHeaderFields (
1687 IN EFI_HTTP_HEADER *HeaderFields,
1688 IN UINTN FieldCount
1689 )
1690 {
1691 UINTN Index;
1692
1693 if (HeaderFields != NULL) {
1694 for (Index = 0; Index < FieldCount; Index++) {
1695 if (HeaderFields[Index].FieldName != NULL) {
1696 FreePool (HeaderFields[Index].FieldName);
1697 }
1698 if (HeaderFields[Index].FieldValue != NULL) {
1699 FreePool (HeaderFields[Index].FieldValue);
1700 }
1701 }
1702
1703 FreePool (HeaderFields);
1704 }
1705 }
1706
1707 /**
1708 Generate HTTP request message.
1709
1710 This function will allocate memory for the whole HTTP message and generate a
1711 well formatted HTTP Request message in it, include the Request-Line, header
1712 fields and also the message body. It is the caller's responsibility to free
1713 the buffer returned in *RequestMsg.
1714
1715 @param[in] Message Pointer to the EFI_HTTP_MESSAGE structure which
1716 contains the required information to generate
1717 the HTTP request message.
1718 @param[in] Url The URL of a remote host.
1719 @param[out] RequestMsg Pointer to the created HTTP request message.
1720 NULL if any error occured.
1721 @param[out] RequestMsgSize Size of the RequestMsg (in bytes).
1722
1723 @retval EFI_SUCCESS If HTTP request string was created successfully.
1724 @retval EFI_OUT_OF_RESOURCES Failed to allocate resources.
1725 @retval EFI_INVALID_PARAMETER The input arguments are invalid.
1726
1727 **/
1728 EFI_STATUS
1729 EFIAPI
HttpGenRequestMessage(IN CONST EFI_HTTP_MESSAGE * Message,IN CONST CHAR8 * Url,OUT CHAR8 ** RequestMsg,OUT UINTN * RequestMsgSize)1730 HttpGenRequestMessage (
1731 IN CONST EFI_HTTP_MESSAGE *Message,
1732 IN CONST CHAR8 *Url,
1733 OUT CHAR8 **RequestMsg,
1734 OUT UINTN *RequestMsgSize
1735 )
1736 {
1737 EFI_STATUS Status;
1738 UINTN StrLength;
1739 CHAR8 *RequestPtr;
1740 UINTN HttpHdrSize;
1741 UINTN MsgSize;
1742 BOOLEAN Success;
1743 VOID *HttpHdr;
1744 EFI_HTTP_HEADER **AppendList;
1745 UINTN Index;
1746 EFI_HTTP_UTILITIES_PROTOCOL *HttpUtilitiesProtocol;
1747
1748 Status = EFI_SUCCESS;
1749 HttpHdrSize = 0;
1750 MsgSize = 0;
1751 Success = FALSE;
1752 HttpHdr = NULL;
1753 AppendList = NULL;
1754 HttpUtilitiesProtocol = NULL;
1755
1756 //
1757 // 1. If we have a Request, we cannot have a NULL Url
1758 // 2. If we have a Request, HeaderCount can not be non-zero
1759 // 3. If we do not have a Request, HeaderCount should be zero
1760 // 4. If we do not have Request and Headers, we need at least a message-body
1761 //
1762 if ((Message == NULL || RequestMsg == NULL || RequestMsgSize == NULL) ||
1763 (Message->Data.Request != NULL && Url == NULL) ||
1764 (Message->Data.Request != NULL && Message->HeaderCount == 0) ||
1765 (Message->Data.Request == NULL && Message->HeaderCount != 0) ||
1766 (Message->Data.Request == NULL && Message->HeaderCount == 0 && Message->BodyLength == 0)) {
1767 return EFI_INVALID_PARAMETER;
1768 }
1769
1770 if (Message->HeaderCount != 0) {
1771 //
1772 // Locate the HTTP_UTILITIES protocol.
1773 //
1774 Status = gBS->LocateProtocol (
1775 &gEfiHttpUtilitiesProtocolGuid,
1776 NULL,
1777 (VOID **) &HttpUtilitiesProtocol
1778 );
1779
1780 if (EFI_ERROR (Status)) {
1781 DEBUG ((DEBUG_ERROR,"Failed to locate Http Utilities protocol. Status = %r.\n", Status));
1782 return Status;
1783 }
1784
1785 //
1786 // Build AppendList to send into HttpUtilitiesBuild
1787 //
1788 AppendList = AllocateZeroPool (sizeof (EFI_HTTP_HEADER *) * (Message->HeaderCount));
1789 if (AppendList == NULL) {
1790 return EFI_OUT_OF_RESOURCES;
1791 }
1792
1793 for(Index = 0; Index < Message->HeaderCount; Index++){
1794 AppendList[Index] = &Message->Headers[Index];
1795 }
1796
1797 //
1798 // Build raw HTTP Headers
1799 //
1800 Status = HttpUtilitiesProtocol->Build (
1801 HttpUtilitiesProtocol,
1802 0,
1803 NULL,
1804 0,
1805 NULL,
1806 Message->HeaderCount,
1807 AppendList,
1808 &HttpHdrSize,
1809 &HttpHdr
1810 );
1811
1812 FreePool (AppendList);
1813
1814 if (EFI_ERROR (Status) || HttpHdr == NULL){
1815 return Status;
1816 }
1817 }
1818
1819 //
1820 // If we have headers to be sent, account for it.
1821 //
1822 if (Message->HeaderCount != 0) {
1823 MsgSize = HttpHdrSize;
1824 }
1825
1826 //
1827 // If we have a request line, account for the fields.
1828 //
1829 if (Message->Data.Request != NULL) {
1830 MsgSize += HTTP_METHOD_MAXIMUM_LEN + AsciiStrLen (HTTP_VERSION_CRLF_STR) + AsciiStrLen (Url);
1831 }
1832
1833
1834 //
1835 // If we have a message body to be sent, account for it.
1836 //
1837 MsgSize += Message->BodyLength;
1838
1839 //
1840 // memory for the string that needs to be sent to TCP
1841 //
1842 *RequestMsg = NULL;
1843 *RequestMsg = AllocateZeroPool (MsgSize);
1844 if (*RequestMsg == NULL) {
1845 Status = EFI_OUT_OF_RESOURCES;
1846 goto Exit;
1847 }
1848
1849 RequestPtr = *RequestMsg;
1850 //
1851 // Construct header request
1852 //
1853 if (Message->Data.Request != NULL) {
1854 switch (Message->Data.Request->Method) {
1855 case HttpMethodGet:
1856 StrLength = sizeof (HTTP_METHOD_GET) - 1;
1857 CopyMem (RequestPtr, HTTP_METHOD_GET, StrLength);
1858 RequestPtr += StrLength;
1859 break;
1860 case HttpMethodPut:
1861 StrLength = sizeof (HTTP_METHOD_PUT) - 1;
1862 CopyMem (RequestPtr, HTTP_METHOD_PUT, StrLength);
1863 RequestPtr += StrLength;
1864 break;
1865 case HttpMethodPatch:
1866 StrLength = sizeof (HTTP_METHOD_PATCH) - 1;
1867 CopyMem (RequestPtr, HTTP_METHOD_PATCH, StrLength);
1868 RequestPtr += StrLength;
1869 break;
1870 case HttpMethodPost:
1871 StrLength = sizeof (HTTP_METHOD_POST) - 1;
1872 CopyMem (RequestPtr, HTTP_METHOD_POST, StrLength);
1873 RequestPtr += StrLength;
1874 break;
1875 case HttpMethodHead:
1876 StrLength = sizeof (HTTP_METHOD_HEAD) - 1;
1877 CopyMem (RequestPtr, HTTP_METHOD_HEAD, StrLength);
1878 RequestPtr += StrLength;
1879 break;
1880 case HttpMethodDelete:
1881 StrLength = sizeof (HTTP_METHOD_DELETE) - 1;
1882 CopyMem (RequestPtr, HTTP_METHOD_DELETE, StrLength);
1883 RequestPtr += StrLength;
1884 break;
1885 default:
1886 ASSERT (FALSE);
1887 Status = EFI_INVALID_PARAMETER;
1888 goto Exit;
1889 }
1890
1891 StrLength = AsciiStrLen(EMPTY_SPACE);
1892 CopyMem (RequestPtr, EMPTY_SPACE, StrLength);
1893 RequestPtr += StrLength;
1894
1895 StrLength = AsciiStrLen (Url);
1896 CopyMem (RequestPtr, Url, StrLength);
1897 RequestPtr += StrLength;
1898
1899 StrLength = sizeof (HTTP_VERSION_CRLF_STR) - 1;
1900 CopyMem (RequestPtr, HTTP_VERSION_CRLF_STR, StrLength);
1901 RequestPtr += StrLength;
1902
1903 if (HttpHdr != NULL) {
1904 //
1905 // Construct header
1906 //
1907 CopyMem (RequestPtr, HttpHdr, HttpHdrSize);
1908 RequestPtr += HttpHdrSize;
1909 }
1910 }
1911
1912 //
1913 // Construct body
1914 //
1915 if (Message->Body != NULL) {
1916 CopyMem (RequestPtr, Message->Body, Message->BodyLength);
1917 RequestPtr += Message->BodyLength;
1918 }
1919
1920 //
1921 // Done
1922 //
1923 (*RequestMsgSize) = (UINTN)(RequestPtr) - (UINTN)(*RequestMsg);
1924 Success = TRUE;
1925
1926 Exit:
1927
1928 if (!Success) {
1929 if (*RequestMsg != NULL) {
1930 FreePool (*RequestMsg);
1931 }
1932 *RequestMsg = NULL;
1933 return Status;
1934 }
1935
1936 if (HttpHdr != NULL) {
1937 FreePool (HttpHdr);
1938 }
1939
1940 return EFI_SUCCESS;
1941 }
1942
1943 /**
1944 Translate the status code in HTTP message to EFI_HTTP_STATUS_CODE defined
1945 in UEFI 2.5 specification.
1946
1947 @param[in] StatusCode The status code value in HTTP message.
1948
1949 @return Value defined in EFI_HTTP_STATUS_CODE .
1950
1951 **/
1952 EFI_HTTP_STATUS_CODE
1953 EFIAPI
HttpMappingToStatusCode(IN UINTN StatusCode)1954 HttpMappingToStatusCode (
1955 IN UINTN StatusCode
1956 )
1957 {
1958 switch (StatusCode) {
1959 case 100:
1960 return HTTP_STATUS_100_CONTINUE;
1961 case 101:
1962 return HTTP_STATUS_101_SWITCHING_PROTOCOLS;
1963 case 200:
1964 return HTTP_STATUS_200_OK;
1965 case 201:
1966 return HTTP_STATUS_201_CREATED;
1967 case 202:
1968 return HTTP_STATUS_202_ACCEPTED;
1969 case 203:
1970 return HTTP_STATUS_203_NON_AUTHORITATIVE_INFORMATION;
1971 case 204:
1972 return HTTP_STATUS_204_NO_CONTENT;
1973 case 205:
1974 return HTTP_STATUS_205_RESET_CONTENT;
1975 case 206:
1976 return HTTP_STATUS_206_PARTIAL_CONTENT;
1977 case 300:
1978 return HTTP_STATUS_300_MULTIPLE_CHOICES;
1979 case 301:
1980 return HTTP_STATUS_301_MOVED_PERMANENTLY;
1981 case 302:
1982 return HTTP_STATUS_302_FOUND;
1983 case 303:
1984 return HTTP_STATUS_303_SEE_OTHER;
1985 case 304:
1986 return HTTP_STATUS_304_NOT_MODIFIED;
1987 case 305:
1988 return HTTP_STATUS_305_USE_PROXY;
1989 case 307:
1990 return HTTP_STATUS_307_TEMPORARY_REDIRECT;
1991 case 308:
1992 return HTTP_STATUS_308_PERMANENT_REDIRECT;
1993 case 400:
1994 return HTTP_STATUS_400_BAD_REQUEST;
1995 case 401:
1996 return HTTP_STATUS_401_UNAUTHORIZED;
1997 case 402:
1998 return HTTP_STATUS_402_PAYMENT_REQUIRED;
1999 case 403:
2000 return HTTP_STATUS_403_FORBIDDEN;
2001 case 404:
2002 return HTTP_STATUS_404_NOT_FOUND;
2003 case 405:
2004 return HTTP_STATUS_405_METHOD_NOT_ALLOWED;
2005 case 406:
2006 return HTTP_STATUS_406_NOT_ACCEPTABLE;
2007 case 407:
2008 return HTTP_STATUS_407_PROXY_AUTHENTICATION_REQUIRED;
2009 case 408:
2010 return HTTP_STATUS_408_REQUEST_TIME_OUT;
2011 case 409:
2012 return HTTP_STATUS_409_CONFLICT;
2013 case 410:
2014 return HTTP_STATUS_410_GONE;
2015 case 411:
2016 return HTTP_STATUS_411_LENGTH_REQUIRED;
2017 case 412:
2018 return HTTP_STATUS_412_PRECONDITION_FAILED;
2019 case 413:
2020 return HTTP_STATUS_413_REQUEST_ENTITY_TOO_LARGE;
2021 case 414:
2022 return HTTP_STATUS_414_REQUEST_URI_TOO_LARGE;
2023 case 415:
2024 return HTTP_STATUS_415_UNSUPPORTED_MEDIA_TYPE;
2025 case 416:
2026 return HTTP_STATUS_416_REQUESTED_RANGE_NOT_SATISFIED;
2027 case 417:
2028 return HTTP_STATUS_417_EXPECTATION_FAILED;
2029 case 500:
2030 return HTTP_STATUS_500_INTERNAL_SERVER_ERROR;
2031 case 501:
2032 return HTTP_STATUS_501_NOT_IMPLEMENTED;
2033 case 502:
2034 return HTTP_STATUS_502_BAD_GATEWAY;
2035 case 503:
2036 return HTTP_STATUS_503_SERVICE_UNAVAILABLE;
2037 case 504:
2038 return HTTP_STATUS_504_GATEWAY_TIME_OUT;
2039 case 505:
2040 return HTTP_STATUS_505_HTTP_VERSION_NOT_SUPPORTED;
2041
2042 default:
2043 return HTTP_STATUS_UNSUPPORTED_STATUS;
2044 }
2045 }
2046
2047 /**
2048 Check whether header field called FieldName is in DeleteList.
2049
2050 @param[in] DeleteList Pointer to array of key/value header pairs.
2051 @param[in] DeleteCount The number of header pairs.
2052 @param[in] FieldName Pointer to header field's name.
2053
2054 @return TRUE if FieldName is not in DeleteList, that means this header field is valid.
2055 @return FALSE if FieldName is in DeleteList, that means this header field is invalid.
2056
2057 **/
2058 BOOLEAN
2059 EFIAPI
HttpIsValidHttpHeader(IN CHAR8 * DeleteList[],IN UINTN DeleteCount,IN CHAR8 * FieldName)2060 HttpIsValidHttpHeader (
2061 IN CHAR8 *DeleteList[],
2062 IN UINTN DeleteCount,
2063 IN CHAR8 *FieldName
2064 )
2065 {
2066 UINTN Index;
2067
2068 if (FieldName == NULL) {
2069 return FALSE;
2070 }
2071
2072 for (Index = 0; Index < DeleteCount; Index++) {
2073 if (DeleteList[Index] == NULL) {
2074 continue;
2075 }
2076
2077 if (AsciiStrCmp (FieldName, DeleteList[Index]) == 0) {
2078 return FALSE;
2079 }
2080 }
2081
2082 return TRUE;
2083 }
2084
2085