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43.2.6
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- Committer: Package Import Robot
- Author(s): Aron Xu, Christian Svensson, Daniel Schepler, Helmut Grohne, Adam Conrad, Matthias Klose, Aron Xu
- Date: 2014-07-09 05:40:15 UTC
- mto: This revision was merged to the branch mainline in revision 75.
- Revision ID: package-import@ubuntu.com-20140709054015-rdnfjxrf3zvmw6l7
[ Christian Svensson ]
* Do not build-depend on readline (Closes: #742350)
[ Daniel Schepler ]
* Patch to bootstrap without python (Closes: #738080)
[ Helmut Grohne ]
* Drop unneeded B-D on perl and binutils (Closes: #753005)
[ Adam Conrad ]
* Actually run dh_autoreconf, which the old/new mixed rules file misses.
[ Matthias Klose ]
* Add patch to fix python multiarch issue
* Allow the package to cross-build by tweaking B-Ds on python
* Set PYTHON_LIBS for cross builds
[ Aron Xu ]
* Use correct $CC
* Configure udeb without python
* New round of cherry-picking upstream fixes
- Includes fixes for CVE-2014-0191 (Closes: #747309).
* Call prename with -vf
* Require python-all-dev (>= 2.7.5-5~)
* Bump std-ver: 3.9.4 -> 3.9.5, no change
* Do not build-depend on readline (Closes: #742350)
[ Daniel Schepler ]
* Patch to bootstrap without python (Closes: #738080)
[ Helmut Grohne ]
* Drop unneeded B-D on perl and binutils (Closes: #753005)
[ Adam Conrad ]
* Actually run dh_autoreconf, which the old/new mixed rules file misses.
[ Matthias Klose ]
* Add patch to fix python multiarch issue
* Allow the package to cross-build by tweaking B-Ds on python
* Set PYTHON_LIBS for cross builds
[ Aron Xu ]
* Use correct $CC
* Configure udeb without python
* New round of cherry-picking upstream fixes
- Includes fixes for CVE-2014-0191 (Closes: #747309).
* Call prename with -vf
* Require python-all-dev (>= 2.7.5-5~)
* Bump std-ver: 3.9.4 -> 3.9.5, no change
- files added:
- .pc/0002-fix-python-multiarch-includes.patch
- .pc/0002-fix-python-multiarch-includes.patch/python
- .pc/0003-Fix-an-error-in-xmlCleanupParser.patch
- .pc/0004-Fix-missing-break-on-last-function-for-attributes.patch
- .pc/0004-Fix-missing-break-on-last-function-for-attributes.patch/python
- .pc/0005-xmllint-memory-should-fail-on-empty-files.patch
- .pc/0006-properly-quote-the-namespace-uris-written-out-during.patch
- .pc/0007-Fix-a-parsing-bug-on-non-ascii-element-and-CR-LF-usa.patch
- .pc/0008-missing-else-in-xlink.c.patch
- .pc/0009-Catch-malloc-error-and-exit-accordingly.patch
- .pc/0010-Fix-handling-of-mmap-errors.patch
- .pc/0011-Avoid-crash-if-allocation-fails.patch
- .pc/0012-Fix-a-possible-NULL-dereference.patch
- .pc/0013-Clear-up-a-potential-NULL-dereference.patch
- .pc/0014-Fix-XPath-optimization-with-predicates.patch
- .pc/0015-xmllint-pretty-crashed-without-following-numeric-arg.patch
- .pc/0016-Fix-potential-NULL-pointer-dereferences-in-regexp-co.patch
- .pc/0017-Fix-a-potential-NULL-dereference-in-tree-code.patch
- .pc/0018-Fix-pointer-dereferenced-before-null-check.patch
- .pc/0019-Fix-a-bug-loading-some-compressed-files.patch
- .pc/0020-Avoid-a-possibility-of-dangling-encoding-handler.patch
- .pc/0021-Fix-a-couple-of-missing-NULL-checks.patch
- .pc/0022-adding-init-calls-to-xml-and-html-Read-parsing-entry.patch
- .pc/0023-Handling-of-XPath-function-arguments-in-error-case.patch
- .pc/0024-Missing-initialization-for-the-catalog-module.patch
- .pc/0025-Fix-an-fd-leak-in-an-error-case.patch
- .pc/0026-fixing-a-ptotential-uninitialized-access.patch
- .pc/0027-Fix-xmlTextWriterWriteElement-when-a-null-content-is.patch
- .pc/0028-Avoid-a-possible-NULL-pointer-dereference.patch
- .pc/0029-Do-not-fetch-external-parameter-entities.patch
- .pc/0030-Avoid-Possible-null-pointer-dereference-in-memory-de.patch
- .pc/0031-xmllint-was-not-parsing-the-c14n11-flag.patch
- .pc/0032-Fix-regressions-introduced-by-CVE-2014-0191-patch.patch
- files removed:
- .pc/0002-Fix-an-error-in-xmlCleanupParser.patch
- .pc/0003-Fix-missing-break-on-last-function-for-attributes.patch
- .pc/0003-Fix-missing-break-on-last-function-for-attributes.patch/python
- .pc/0004-xmllint-memory-should-fail-on-empty-files.patch
- .pc/0005-properly-quote-the-namespace-uris-written-out-during.patch
- .pc/0006-Fix-a-parsing-bug-on-non-ascii-element-and-CR-LF-usa.patch
- .pc/0007-Fix-XPath-optimization-with-predicates.patch
- files modified:
- .pc/applied-patches
added
removed
.pc/0005-properly-quote-the-namespace-uris-written-out-during.patch/c14n.c
1
/*
2
* "Canonical XML" implementation
3
* http://www.w3.org/TR/xml-c14n
4
*
5
* "Exclusive XML Canonicalization" implementation
6
* http://www.w3.org/TR/xml-exc-c14n
7
*
8
* See Copyright for the status of this software.
9
*
10
* Author: Aleksey Sanin <aleksey@aleksey.com>
11
*/
12
#define IN_LIBXML
13
#include "libxml.h"
14
#ifdef LIBXML_C14N_ENABLED
15
#ifdef LIBXML_OUTPUT_ENABLED
16
17
#ifdef HAVE_STDLIB_H
18
#include <stdlib.h>
19
#endif
20
#include <string.h>
21
22
#include <libxml/tree.h>
23
#include <libxml/parser.h>
24
#include <libxml/uri.h>
25
#include <libxml/xmlerror.h>
26
#include <libxml/globals.h>
27
#include <libxml/xpathInternals.h>
28
#include <libxml/c14n.h>
29
30
#include "buf.h"
31
32
/************************************************************************
33
* *
34
* Some declaration better left private ATM *
35
* *
36
************************************************************************/
37
38
typedef enum {
39
XMLC14N_BEFORE_DOCUMENT_ELEMENT = 0,
40
XMLC14N_INSIDE_DOCUMENT_ELEMENT = 1,
41
XMLC14N_AFTER_DOCUMENT_ELEMENT = 2
42
} xmlC14NPosition;
43
44
typedef struct _xmlC14NVisibleNsStack {
45
int nsCurEnd; /* number of nodes in the set */
46
int nsPrevStart; /* the begginning of the stack for previous visible node */
47
int nsPrevEnd; /* the end of the stack for previous visible node */
48
int nsMax; /* size of the array as allocated */
49
xmlNsPtr *nsTab; /* array of ns in no particular order */
50
xmlNodePtr *nodeTab; /* array of nodes in no particular order */
51
} xmlC14NVisibleNsStack, *xmlC14NVisibleNsStackPtr;
52
53
typedef struct _xmlC14NCtx {
54
/* input parameters */
55
xmlDocPtr doc;
56
xmlC14NIsVisibleCallback is_visible_callback;
57
void* user_data;
58
int with_comments;
59
xmlOutputBufferPtr buf;
60
61
/* position in the XML document */
62
xmlC14NPosition pos;
63
int parent_is_doc;
64
xmlC14NVisibleNsStackPtr ns_rendered;
65
66
/* C14N mode */
67
xmlC14NMode mode;
68
69
/* exclusive canonicalization */
70
xmlChar **inclusive_ns_prefixes;
71
72
/* error number */
73
int error;
74
} xmlC14NCtx, *xmlC14NCtxPtr;
75
76
static xmlC14NVisibleNsStackPtr xmlC14NVisibleNsStackCreate (void);
77
static void xmlC14NVisibleNsStackDestroy (xmlC14NVisibleNsStackPtr cur);
78
static void xmlC14NVisibleNsStackAdd (xmlC14NVisibleNsStackPtr cur,
79
xmlNsPtr ns,
80
xmlNodePtr node);
81
static void xmlC14NVisibleNsStackSave (xmlC14NVisibleNsStackPtr cur,
82
xmlC14NVisibleNsStackPtr state);
83
static void xmlC14NVisibleNsStackRestore (xmlC14NVisibleNsStackPtr cur,
84
xmlC14NVisibleNsStackPtr state);
85
static void xmlC14NVisibleNsStackShift (xmlC14NVisibleNsStackPtr cur);
86
static int xmlC14NVisibleNsStackFind (xmlC14NVisibleNsStackPtr cur,
87
xmlNsPtr ns);
88
static int xmlExcC14NVisibleNsStackFind (xmlC14NVisibleNsStackPtr cur,
89
xmlNsPtr ns,
90
xmlC14NCtxPtr ctx);
91
92
static int xmlC14NIsNodeInNodeset (xmlNodeSetPtr nodes,
93
xmlNodePtr node,
94
xmlNodePtr parent);
95
96
97
98
static int xmlC14NProcessNode(xmlC14NCtxPtr ctx, xmlNodePtr cur);
99
static int xmlC14NProcessNodeList(xmlC14NCtxPtr ctx, xmlNodePtr cur);
100
typedef enum {
101
XMLC14N_NORMALIZE_ATTR = 0,
102
XMLC14N_NORMALIZE_COMMENT = 1,
103
XMLC14N_NORMALIZE_PI = 2,
104
XMLC14N_NORMALIZE_TEXT = 3
105
} xmlC14NNormalizationMode;
106
107
static xmlChar *xmlC11NNormalizeString(const xmlChar * input,
108
xmlC14NNormalizationMode mode);
109
110
#define xmlC11NNormalizeAttr( a ) \
111
xmlC11NNormalizeString((a), XMLC14N_NORMALIZE_ATTR)
112
#define xmlC11NNormalizeComment( a ) \
113
xmlC11NNormalizeString((a), XMLC14N_NORMALIZE_COMMENT)
114
#define xmlC11NNormalizePI( a ) \
115
xmlC11NNormalizeString((a), XMLC14N_NORMALIZE_PI)
116
#define xmlC11NNormalizeText( a ) \
117
xmlC11NNormalizeString((a), XMLC14N_NORMALIZE_TEXT)
118
119
#define xmlC14NIsVisible( ctx, node, parent ) \
120
(((ctx)->is_visible_callback != NULL) ? \
121
(ctx)->is_visible_callback((ctx)->user_data, \
122
(xmlNodePtr)(node), (xmlNodePtr)(parent)) : 1)
123
124
#define xmlC14NIsExclusive( ctx ) \
125
( (ctx)->mode == XML_C14N_EXCLUSIVE_1_0 )
126
127
/************************************************************************
128
* *
129
* Some factorized error routines *
130
* *
131
************************************************************************/
132
133
/**
134
* xmlC14NErrMemory:
135
* @extra: extra informations
136
*
137
* Handle a redefinition of memory error
138
*/
139
static void
140
xmlC14NErrMemory(const char *extra)
141
{
142
__xmlRaiseError(NULL, NULL, NULL, NULL, NULL, XML_FROM_C14N,
143
XML_ERR_NO_MEMORY, XML_ERR_ERROR, NULL, 0, extra,
144
NULL, NULL, 0, 0,
145
"Memory allocation failed : %s\n", extra);
146
}
147
148
/**
149
* xmlC14NErrParam:
150
* @extra: extra informations
151
*
152
* Handle a redefinition of param error
153
*/
154
static void
155
xmlC14NErrParam(const char *extra)
156
{
157
__xmlRaiseError(NULL, NULL, NULL, NULL, NULL, XML_FROM_C14N,
158
XML_ERR_INTERNAL_ERROR, XML_ERR_ERROR, NULL, 0, extra,
159
NULL, NULL, 0, 0,
160
"Invalid parameter : %s\n", extra);
161
}
162
163
/**
164
* xmlC14NErrInternal:
165
* @extra: extra informations
166
*
167
* Handle a redefinition of internal error
168
*/
169
static void
170
xmlC14NErrInternal(const char *extra)
171
{
172
__xmlRaiseError(NULL, NULL, NULL, NULL, NULL, XML_FROM_C14N,
173
XML_ERR_INTERNAL_ERROR, XML_ERR_ERROR, NULL, 0, extra,
174
NULL, NULL, 0, 0,
175
"Internal error : %s\n", extra);
176
}
177
178
/**
179
* xmlC14NErrInvalidNode:
180
* @extra: extra informations
181
*
182
* Handle a redefinition of invalid node error
183
*/
184
static void
185
xmlC14NErrInvalidNode(const char *node_type, const char *extra)
186
{
187
__xmlRaiseError(NULL, NULL, NULL, NULL, NULL, XML_FROM_C14N,
188
XML_C14N_INVALID_NODE, XML_ERR_ERROR, NULL, 0, extra,
189
NULL, NULL, 0, 0,
190
"Node %s is invalid here : %s\n", node_type, extra);
191
}
192
193
/**
194
* xmlC14NErrUnknownNode:
195
* @extra: extra informations
196
*
197
* Handle a redefinition of unknown node error
198
*/
199
static void
200
xmlC14NErrUnknownNode(int node_type, const char *extra)
201
{
202
__xmlRaiseError(NULL, NULL, NULL, NULL, NULL, XML_FROM_C14N,
203
XML_C14N_UNKNOW_NODE, XML_ERR_ERROR, NULL, 0, extra,
204
NULL, NULL, 0, 0,
205
"Unknown node type %d found : %s\n", node_type, extra);
206
}
207
208
/**
209
* xmlC14NErrRelativeNamespace:
210
* @extra: extra informations
211
*
212
* Handle a redefinition of relative namespace error
213
*/
214
static void
215
xmlC14NErrRelativeNamespace(const char *ns_uri)
216
{
217
__xmlRaiseError(NULL, NULL, NULL, NULL, NULL, XML_FROM_C14N,
218
XML_C14N_RELATIVE_NAMESPACE, XML_ERR_ERROR, NULL, 0, NULL,
219
NULL, NULL, 0, 0,
220
"Relative namespace UR is invalid here : %s\n", ns_uri);
221
}
222
223
224
225
/**
226
* xmlC14NErr:
227
* @ctxt: a C14N evaluation context
228
* @node: the context node
229
* @error: the erorr code
230
* @msg: the message
231
* @extra: extra informations
232
*
233
* Handle a redefinition of attribute error
234
*/
235
static void
236
xmlC14NErr(xmlC14NCtxPtr ctxt, xmlNodePtr node, int error,
237
const char * msg)
238
{
239
if (ctxt != NULL)
240
ctxt->error = error;
241
__xmlRaiseError(NULL, NULL, NULL,
242
ctxt, node, XML_FROM_C14N, error,
243
XML_ERR_ERROR, NULL, 0,
244
NULL, NULL, NULL, 0, 0, "%s", msg);
245
}
246
247
/************************************************************************
248
* *
249
* The implementation internals *
250
* *
251
************************************************************************/
252
#define XML_NAMESPACES_DEFAULT 16
253
254
static int
255
xmlC14NIsNodeInNodeset(xmlNodeSetPtr nodes, xmlNodePtr node, xmlNodePtr parent) {
256
if((nodes != NULL) && (node != NULL)) {
257
if(node->type != XML_NAMESPACE_DECL) {
258
return(xmlXPathNodeSetContains(nodes, node));
259
} else {
260
xmlNs ns;
261
262
memcpy(&ns, node, sizeof(ns));
263
264
/* this is a libxml hack! check xpath.c for details */
265
if((parent != NULL) && (parent->type == XML_ATTRIBUTE_NODE)) {
266
ns.next = (xmlNsPtr)parent->parent;
267
} else {
268
ns.next = (xmlNsPtr)parent;
269
}
270
271
/*
272
* If the input is an XPath node-set, then the node-set must explicitly
273
* contain every node to be rendered to the canonical form.
274
*/
275
return(xmlXPathNodeSetContains(nodes, (xmlNodePtr)&ns));
276
}
277
}
278
return(1);
279
}
280
281
static xmlC14NVisibleNsStackPtr
282
xmlC14NVisibleNsStackCreate(void) {
283
xmlC14NVisibleNsStackPtr ret;
284
285
ret = (xmlC14NVisibleNsStackPtr) xmlMalloc(sizeof(xmlC14NVisibleNsStack));
286
if (ret == NULL) {
287
xmlC14NErrMemory("creating namespaces stack");
288
return(NULL);
289
}
290
memset(ret, 0 , (size_t) sizeof(xmlC14NVisibleNsStack));
291
return(ret);
292
}
293
294
static void
295
xmlC14NVisibleNsStackDestroy(xmlC14NVisibleNsStackPtr cur) {
296
if(cur == NULL) {
297
xmlC14NErrParam("destroying namespaces stack");
298
return;
299
}
300
if(cur->nsTab != NULL) {
301
memset(cur->nsTab, 0, cur->nsMax * sizeof(xmlNsPtr));
302
xmlFree(cur->nsTab);
303
}
304
if(cur->nodeTab != NULL) {
305
memset(cur->nodeTab, 0, cur->nsMax * sizeof(xmlNodePtr));
306
xmlFree(cur->nodeTab);
307
}
308
memset(cur, 0, sizeof(xmlC14NVisibleNsStack));
309
xmlFree(cur);
310
311
}
312
313
static void
314
xmlC14NVisibleNsStackAdd(xmlC14NVisibleNsStackPtr cur, xmlNsPtr ns, xmlNodePtr node) {
315
if((cur == NULL) ||
316
((cur->nsTab == NULL) && (cur->nodeTab != NULL)) ||
317
((cur->nsTab != NULL) && (cur->nodeTab == NULL))) {
318
xmlC14NErrParam("adding namespace to stack");
319
return;
320
}
321
322
if ((cur->nsTab == NULL) && (cur->nodeTab == NULL)) {
323
cur->nsTab = (xmlNsPtr*) xmlMalloc(XML_NAMESPACES_DEFAULT * sizeof(xmlNsPtr));
324
cur->nodeTab = (xmlNodePtr*) xmlMalloc(XML_NAMESPACES_DEFAULT * sizeof(xmlNodePtr));
325
if ((cur->nsTab == NULL) || (cur->nodeTab == NULL)) {
326
xmlC14NErrMemory("adding node to stack");
327
return;
328
}
329
memset(cur->nsTab, 0 , XML_NAMESPACES_DEFAULT * sizeof(xmlNsPtr));
330
memset(cur->nodeTab, 0 , XML_NAMESPACES_DEFAULT * sizeof(xmlNodePtr));
331
cur->nsMax = XML_NAMESPACES_DEFAULT;
332
} else if(cur->nsMax == cur->nsCurEnd) {
333
void *tmp;
334
int tmpSize;
335
336
tmpSize = 2 * cur->nsMax;
337
tmp = xmlRealloc(cur->nsTab, tmpSize * sizeof(xmlNsPtr));
338
if (tmp == NULL) {
339
xmlC14NErrMemory("adding node to stack");
340
return;
341
}
342
cur->nsTab = (xmlNsPtr*)tmp;
343
344
tmp = xmlRealloc(cur->nodeTab, tmpSize * sizeof(xmlNodePtr));
345
if (tmp == NULL) {
346
xmlC14NErrMemory("adding node to stack");
347
return;
348
}
349
cur->nodeTab = (xmlNodePtr*)tmp;
350
351
cur->nsMax = tmpSize;
352
}
353
cur->nsTab[cur->nsCurEnd] = ns;
354
cur->nodeTab[cur->nsCurEnd] = node;
355
356
++cur->nsCurEnd;
357
}
358
359
static void
360
xmlC14NVisibleNsStackSave(xmlC14NVisibleNsStackPtr cur, xmlC14NVisibleNsStackPtr state) {
361
if((cur == NULL) || (state == NULL)) {
362
xmlC14NErrParam("saving namespaces stack");
363
return;
364
}
365
366
state->nsCurEnd = cur->nsCurEnd;
367
state->nsPrevStart = cur->nsPrevStart;
368
state->nsPrevEnd = cur->nsPrevEnd;
369
}
370
371
static void
372
xmlC14NVisibleNsStackRestore(xmlC14NVisibleNsStackPtr cur, xmlC14NVisibleNsStackPtr state) {
373
if((cur == NULL) || (state == NULL)) {
374
xmlC14NErrParam("restoring namespaces stack");
375
return;
376
}
377
cur->nsCurEnd = state->nsCurEnd;
378
cur->nsPrevStart = state->nsPrevStart;
379
cur->nsPrevEnd = state->nsPrevEnd;
380
}
381
382
static void
383
xmlC14NVisibleNsStackShift(xmlC14NVisibleNsStackPtr cur) {
384
if(cur == NULL) {
385
xmlC14NErrParam("shifting namespaces stack");
386
return;
387
}
388
cur->nsPrevStart = cur->nsPrevEnd;
389
cur->nsPrevEnd = cur->nsCurEnd;
390
}
391
392
static int
393
xmlC14NStrEqual(const xmlChar *str1, const xmlChar *str2) {
394
if (str1 == str2) return(1);
395
if (str1 == NULL) return((*str2) == '\0');
396
if (str2 == NULL) return((*str1) == '\0');
397
do {
398
if (*str1++ != *str2) return(0);
399
} while (*str2++);
400
return(1);
401
}
402
403
/**
404
* xmlC14NVisibleNsStackFind:
405
* @ctx: the C14N context
406
* @ns: the namespace to check
407
*
408
* Checks whether the given namespace was already rendered or not
409
*
410
* Returns 1 if we already wrote this namespace or 0 otherwise
411
*/
412
static int
413
xmlC14NVisibleNsStackFind(xmlC14NVisibleNsStackPtr cur, xmlNsPtr ns)
414
{
415
int i;
416
const xmlChar *prefix;
417
const xmlChar *href;
418
int has_empty_ns;
419
420
if(cur == NULL) {
421
xmlC14NErrParam("searching namespaces stack (c14n)");
422
return (0);
423
}
424
425
/*
426
* if the default namespace xmlns="" is not defined yet then
427
* we do not want to print it out
428
*/
429
prefix = ((ns == NULL) || (ns->prefix == NULL)) ? BAD_CAST "" : ns->prefix;
430
href = ((ns == NULL) || (ns->href == NULL)) ? BAD_CAST "" : ns->href;
431
has_empty_ns = (xmlC14NStrEqual(prefix, NULL) && xmlC14NStrEqual(href, NULL));
432
433
if (cur->nsTab != NULL) {
434
int start = (has_empty_ns) ? 0 : cur->nsPrevStart;
435
for (i = cur->nsCurEnd - 1; i >= start; --i) {
436
xmlNsPtr ns1 = cur->nsTab[i];
437
438
if(xmlC14NStrEqual(prefix, (ns1 != NULL) ? ns1->prefix : NULL)) {
439
return(xmlC14NStrEqual(href, (ns1 != NULL) ? ns1->href : NULL));
440
}
441
}
442
}
443
return(has_empty_ns);
444
}
445
446
static int
447
xmlExcC14NVisibleNsStackFind(xmlC14NVisibleNsStackPtr cur, xmlNsPtr ns, xmlC14NCtxPtr ctx) {
448
int i;
449
const xmlChar *prefix;
450
const xmlChar *href;
451
int has_empty_ns;
452
453
if(cur == NULL) {
454
xmlC14NErrParam("searching namespaces stack (exc c14n)");
455
return (0);
456
}
457
458
/*
459
* if the default namespace xmlns="" is not defined yet then
460
* we do not want to print it out
461
*/
462
prefix = ((ns == NULL) || (ns->prefix == NULL)) ? BAD_CAST "" : ns->prefix;
463
href = ((ns == NULL) || (ns->href == NULL)) ? BAD_CAST "" : ns->href;
464
has_empty_ns = (xmlC14NStrEqual(prefix, NULL) && xmlC14NStrEqual(href, NULL));
465
466
if (cur->nsTab != NULL) {
467
int start = 0;
468
for (i = cur->nsCurEnd - 1; i >= start; --i) {
469
xmlNsPtr ns1 = cur->nsTab[i];
470
471
if(xmlC14NStrEqual(prefix, (ns1 != NULL) ? ns1->prefix : NULL)) {
472
if(xmlC14NStrEqual(href, (ns1 != NULL) ? ns1->href : NULL)) {
473
return(xmlC14NIsVisible(ctx, ns1, cur->nodeTab[i]));
474
} else {
475
return(0);
476
}
477
}
478
}
479
}
480
return(has_empty_ns);
481
}
482
483
484
485
486
/**
487
* xmlC14NIsXmlNs:
488
* @ns: the namespace to check
489
*
490
* Checks whether the given namespace is a default "xml:" namespace
491
* with href="http://www.w3.org/XML/1998/namespace"
492
*
493
* Returns 1 if the node is default or 0 otherwise
494
*/
495
496
/* todo: make it a define? */
497
static int
498
xmlC14NIsXmlNs(xmlNsPtr ns)
499
{
500
return ((ns != NULL) &&
501
(xmlStrEqual(ns->prefix, BAD_CAST "xml")) &&
502
(xmlStrEqual(ns->href, XML_XML_NAMESPACE)));
503
}
504
505
506
/**
507
* xmlC14NNsCompare:
508
* @ns1: the pointer to first namespace
509
* @ns2: the pointer to second namespace
510
*
511
* Compares the namespaces by names (prefixes).
512
*
513
* Returns -1 if ns1 < ns2, 0 if ns1 == ns2 or 1 if ns1 > ns2.
514
*/
515
static int
516
xmlC14NNsCompare(xmlNsPtr ns1, xmlNsPtr ns2)
517
{
518
if (ns1 == ns2)
519
return (0);
520
if (ns1 == NULL)
521
return (-1);
522
if (ns2 == NULL)
523
return (1);
524
525
return (xmlStrcmp(ns1->prefix, ns2->prefix));
526
}
527
528
529
/**
530
* xmlC14NPrintNamespaces:
531
* @ns: the pointer to namespace
532
* @ctx: the C14N context
533
*
534
* Prints the given namespace to the output buffer from C14N context.
535
*
536
* Returns 1 on success or 0 on fail.
537
*/
538
static int
539
xmlC14NPrintNamespaces(const xmlNsPtr ns, xmlC14NCtxPtr ctx)
540
{
541
542
if ((ns == NULL) || (ctx == NULL)) {
543
xmlC14NErrParam("writing namespaces");
544
return 0;
545
}
546
547
if (ns->prefix != NULL) {
548
xmlOutputBufferWriteString(ctx->buf, " xmlns:");
549
xmlOutputBufferWriteString(ctx->buf, (const char *) ns->prefix);
550
xmlOutputBufferWriteString(ctx->buf, "=\"");
551
} else {
552
xmlOutputBufferWriteString(ctx->buf, " xmlns=\"");
553
}
554
if(ns->href != NULL) {
555
xmlOutputBufferWriteString(ctx->buf, (const char *) ns->href);
556
}
557
xmlOutputBufferWriteString(ctx->buf, "\"");
558
return (1);
559
}
560
561
/**
562
* xmlC14NProcessNamespacesAxis:
563
* @ctx: the C14N context
564
* @node: the current node
565
*
566
* Prints out canonical namespace axis of the current node to the
567
* buffer from C14N context as follows
568
*
569
* Canonical XML v 1.0 (http://www.w3.org/TR/xml-c14n)
570
*
571
* Namespace Axis
572
* Consider a list L containing only namespace nodes in the
573
* axis and in the node-set in lexicographic order (ascending). To begin
574
* processing L, if the first node is not the default namespace node (a node
575
* with no namespace URI and no local name), then generate a space followed
576
* by xmlns="" if and only if the following conditions are met:
577
* - the element E that owns the axis is in the node-set
578
* - The nearest ancestor element of E in the node-set has a default
579
* namespace node in the node-set (default namespace nodes always
580
* have non-empty values in XPath)
581
* The latter condition eliminates unnecessary occurrences of xmlns="" in
582
* the canonical form since an element only receives an xmlns="" if its
583
* default namespace is empty and if it has an immediate parent in the
584
* canonical form that has a non-empty default namespace. To finish
585
* processing L, simply process every namespace node in L, except omit
586
* namespace node with local name xml, which defines the xml prefix,
587
* if its string value is http://www.w3.org/XML/1998/namespace.
588
*
589
* Exclusive XML Canonicalization v 1.0 (http://www.w3.org/TR/xml-exc-c14n)
590
* Canonical XML applied to a document subset requires the search of the
591
* ancestor nodes of each orphan element node for attributes in the xml
592
* namespace, such as xml:lang and xml:space. These are copied into the
593
* element node except if a declaration of the same attribute is already
594
* in the attribute axis of the element (whether or not it is included in
595
* the document subset). This search and copying are omitted from the
596
* Exclusive XML Canonicalization method.
597
*
598
* Returns 0 on success or -1 on fail.
599
*/
600
static int
601
xmlC14NProcessNamespacesAxis(xmlC14NCtxPtr ctx, xmlNodePtr cur, int visible)
602
{
603
xmlNodePtr n;
604
xmlNsPtr ns, tmp;
605
xmlListPtr list;
606
int already_rendered;
607
int has_empty_ns = 0;
608
609
if ((ctx == NULL) || (cur == NULL) || (cur->type != XML_ELEMENT_NODE)) {
610
xmlC14NErrParam("processing namespaces axis (c14n)");
611
return (-1);
612
}
613
614
/*
615
* Create a sorted list to store element namespaces
616
*/
617
list = xmlListCreate(NULL, (xmlListDataCompare) xmlC14NNsCompare);
618
if (list == NULL) {
619
xmlC14NErrInternal("creating namespaces list (c14n)");
620
return (-1);
621
}
622
623
/* check all namespaces */
624
for(n = cur; n != NULL; n = n->parent) {
625
for(ns = n->nsDef; ns != NULL; ns = ns->next) {
626
tmp = xmlSearchNs(cur->doc, cur, ns->prefix);
627
628
if((tmp == ns) && !xmlC14NIsXmlNs(ns) && xmlC14NIsVisible(ctx, ns, cur)) {
629
already_rendered = xmlC14NVisibleNsStackFind(ctx->ns_rendered, ns);
630
if(visible) {
631
xmlC14NVisibleNsStackAdd(ctx->ns_rendered, ns, cur);
632
}
633
if(!already_rendered) {
634
xmlListInsert(list, ns);
635
}
636
if(xmlStrlen(ns->prefix) == 0) {
637
has_empty_ns = 1;
638
}
639
}
640
}
641
}
642
643
/**
644
* if the first node is not the default namespace node (a node with no
645
* namespace URI and no local name), then generate a space followed by
646
* xmlns="" if and only if the following conditions are met:
647
* - the element E that owns the axis is in the node-set
648
* - the nearest ancestor element of E in the node-set has a default
649
* namespace node in the node-set (default namespace nodes always
650
* have non-empty values in XPath)
651
*/
652
if(visible && !has_empty_ns) {
653
static xmlNs ns_default;
654
655
memset(&ns_default, 0, sizeof(ns_default));
656
if(!xmlC14NVisibleNsStackFind(ctx->ns_rendered, &ns_default)) {
657
xmlC14NPrintNamespaces(&ns_default, ctx);
658
}
659
}
660
661
662
/*
663
* print out all elements from list
664
*/
665
xmlListWalk(list, (xmlListWalker) xmlC14NPrintNamespaces, (const void *) ctx);
666
667
/*
668
* Cleanup
669
*/
670
xmlListDelete(list);
671
return (0);
672
}
673
674
675
/**
676
* xmlExcC14NProcessNamespacesAxis:
677
* @ctx: the C14N context
678
* @node: the current node
679
*
680
* Prints out exclusive canonical namespace axis of the current node to the
681
* buffer from C14N context as follows
682
*
683
* Exclusive XML Canonicalization
684
* http://www.w3.org/TR/xml-exc-c14n
685
*
686
* If the element node is in the XPath subset then output the node in
687
* accordance with Canonical XML except for namespace nodes which are
688
* rendered as follows:
689
*
690
* 1. Render each namespace node iff:
691
* * it is visibly utilized by the immediate parent element or one of
692
* its attributes, or is present in InclusiveNamespaces PrefixList, and
693
* * its prefix and value do not appear in ns_rendered. ns_rendered is
694
* obtained by popping the state stack in order to obtain a list of
695
* prefixes and their values which have already been rendered by
696
* an output ancestor of the namespace node's parent element.
697
* 2. Append the rendered namespace node to the list ns_rendered of namespace
698
* nodes rendered by output ancestors. Push ns_rendered on state stack and
699
* recurse.
700
* 3. After the recursion returns, pop thestate stack.
701
*
702
*
703
* Returns 0 on success or -1 on fail.
704
*/
705
static int
706
xmlExcC14NProcessNamespacesAxis(xmlC14NCtxPtr ctx, xmlNodePtr cur, int visible)
707
{
708
xmlNsPtr ns;
709
xmlListPtr list;
710
xmlAttrPtr attr;
711
int already_rendered;
712
int has_empty_ns = 0;
713
int has_visibly_utilized_empty_ns = 0;
714
int has_empty_ns_in_inclusive_list = 0;
715
716
if ((ctx == NULL) || (cur == NULL) || (cur->type != XML_ELEMENT_NODE)) {
717
xmlC14NErrParam("processing namespaces axis (exc c14n)");
718
return (-1);
719
}
720
721
if(!xmlC14NIsExclusive(ctx)) {
722
xmlC14NErrParam("processing namespaces axis (exc c14n)");
723
return (-1);
724
725
}
726
727
/*
728
* Create a sorted list to store element namespaces
729
*/
730
list = xmlListCreate(NULL, (xmlListDataCompare) xmlC14NNsCompare);
731
if (list == NULL) {
732
xmlC14NErrInternal("creating namespaces list (exc c14n)");
733
return (-1);
734
}
735
736
/*
737
* process inclusive namespaces:
738
* All namespace nodes appearing on inclusive ns list are
739
* handled as provided in Canonical XML
740
*/
741
if(ctx->inclusive_ns_prefixes != NULL) {
742
xmlChar *prefix;
743
int i;
744
745
for (i = 0; ctx->inclusive_ns_prefixes[i] != NULL; ++i) {
746
prefix = ctx->inclusive_ns_prefixes[i];
747
/*
748
* Special values for namespace with empty prefix
749
*/
750
if (xmlStrEqual(prefix, BAD_CAST "#default")
751
|| xmlStrEqual(prefix, BAD_CAST "")) {
752
prefix = NULL;
753
has_empty_ns_in_inclusive_list = 1;
754
}
755
756
ns = xmlSearchNs(cur->doc, cur, prefix);
757
if((ns != NULL) && !xmlC14NIsXmlNs(ns) && xmlC14NIsVisible(ctx, ns, cur)) {
758
already_rendered = xmlC14NVisibleNsStackFind(ctx->ns_rendered, ns);
759
if(visible) {
760
xmlC14NVisibleNsStackAdd(ctx->ns_rendered, ns, cur);
761
}
762
if(!already_rendered) {
763
xmlListInsert(list, ns);
764
}
765
if(xmlStrlen(ns->prefix) == 0) {
766
has_empty_ns = 1;
767
}
768
}
769
}
770
}
771
772
/* add node namespace */
773
if(cur->ns != NULL) {
774
ns = cur->ns;
775
} else {
776
ns = xmlSearchNs(cur->doc, cur, NULL);
777
has_visibly_utilized_empty_ns = 1;
778
}
779
if((ns != NULL) && !xmlC14NIsXmlNs(ns)) {
780
if(visible && xmlC14NIsVisible(ctx, ns, cur)) {
781
if(!xmlExcC14NVisibleNsStackFind(ctx->ns_rendered, ns, ctx)) {
782
xmlListInsert(list, ns);
783
}
784
}
785
if(visible) {
786
xmlC14NVisibleNsStackAdd(ctx->ns_rendered, ns, cur);
787
}
788
if(xmlStrlen(ns->prefix) == 0) {
789
has_empty_ns = 1;
790
}
791
}
792
793
794
/* add attributes */
795
for(attr = cur->properties; attr != NULL; attr = attr->next) {
796
/*
797
* we need to check that attribute is visible and has non
798
* default namespace (XML Namespaces: "default namespaces
799
* do not apply directly to attributes")
800
*/
801
if((attr->ns != NULL) && !xmlC14NIsXmlNs(attr->ns) && xmlC14NIsVisible(ctx, attr, cur)) {
802
already_rendered = xmlExcC14NVisibleNsStackFind(ctx->ns_rendered, attr->ns, ctx);
803
xmlC14NVisibleNsStackAdd(ctx->ns_rendered, attr->ns, cur);
804
if(!already_rendered && visible) {
805
xmlListInsert(list, attr->ns);
806
}
807
if(xmlStrlen(attr->ns->prefix) == 0) {
808
has_empty_ns = 1;
809
}
810
} else if((attr->ns != NULL) && (xmlStrlen(attr->ns->prefix) == 0) && (xmlStrlen(attr->ns->href) == 0)) {
811
has_visibly_utilized_empty_ns = 1;
812
}
813
}
814
815
/*
816
* Process xmlns=""
817
*/
818
if(visible && has_visibly_utilized_empty_ns &&
819
!has_empty_ns && !has_empty_ns_in_inclusive_list) {
820
static xmlNs ns_default;
821
822
memset(&ns_default, 0, sizeof(ns_default));
823
824
already_rendered = xmlExcC14NVisibleNsStackFind(ctx->ns_rendered, &ns_default, ctx);
825
if(!already_rendered) {
826
xmlC14NPrintNamespaces(&ns_default, ctx);
827
}
828
} else if(visible && !has_empty_ns && has_empty_ns_in_inclusive_list) {
829
static xmlNs ns_default;
830
831
memset(&ns_default, 0, sizeof(ns_default));
832
if(!xmlC14NVisibleNsStackFind(ctx->ns_rendered, &ns_default)) {
833
xmlC14NPrintNamespaces(&ns_default, ctx);
834
}
835
}
836
837
838
839
/*
840
* print out all elements from list
841
*/
842
xmlListWalk(list, (xmlListWalker) xmlC14NPrintNamespaces, (const void *) ctx);
843
844
/*
845
* Cleanup
846
*/
847
xmlListDelete(list);
848
return (0);
849
}
850
851
852
/**
853
* xmlC14NIsXmlAttr:
854
* @attr: the attr to check
855
*
856
* Checks whether the given attribute is a default "xml:" namespace
857
* with href="http://www.w3.org/XML/1998/namespace"
858
*
859
* Returns 1 if the node is default or 0 otherwise
860
*/
861
862
/* todo: make it a define? */
863
static int
864
xmlC14NIsXmlAttr(xmlAttrPtr attr)
865
{
866
return ((attr->ns != NULL) &&
867
(xmlC14NIsXmlNs(attr->ns) != 0));
868
}
869
870
871
/**
872
* xmlC14NAttrsCompare:
873
* @attr1: the pointer tls o first attr
874
* @attr2: the pointer to second attr
875
*
876
* Prints the given attribute to the output buffer from C14N context.
877
*
878
* Returns -1 if attr1 < attr2, 0 if attr1 == attr2 or 1 if attr1 > attr2.
879
*/
880
static int
881
xmlC14NAttrsCompare(xmlAttrPtr attr1, xmlAttrPtr attr2)
882
{
883
int ret = 0;
884
885
/*
886
* Simple cases
887
*/
888
if (attr1 == attr2)
889
return (0);
890
if (attr1 == NULL)
891
return (-1);
892
if (attr2 == NULL)
893
return (1);
894
if (attr1->ns == attr2->ns) {
895
return (xmlStrcmp(attr1->name, attr2->name));
896
}
897
898
/*
899
* Attributes in the default namespace are first
900
* because the default namespace is not applied to
901
* unqualified attributes
902
*/
903
if (attr1->ns == NULL)
904
return (-1);
905
if (attr2->ns == NULL)
906
return (1);
907
if (attr1->ns->prefix == NULL)
908
return (-1);
909
if (attr2->ns->prefix == NULL)
910
return (1);
911
912
ret = xmlStrcmp(attr1->ns->href, attr2->ns->href);
913
if (ret == 0) {
914
ret = xmlStrcmp(attr1->name, attr2->name);
915
}
916
return (ret);
917
}
918
919
920
/**
921
* xmlC14NPrintAttrs:
922
* @attr: the pointer to attr
923
* @ctx: the C14N context
924
*
925
* Prints out canonical attribute urrent node to the
926
* buffer from C14N context as follows
927
*
928
* Canonical XML v 1.0 (http://www.w3.org/TR/xml-c14n)
929
*
930
* Returns 1 on success or 0 on fail.
931
*/
932
static int
933
xmlC14NPrintAttrs(const xmlAttrPtr attr, xmlC14NCtxPtr ctx)
934
{
935
xmlChar *value;
936
xmlChar *buffer;
937
938
if ((attr == NULL) || (ctx == NULL)) {
939
xmlC14NErrParam("writing attributes");
940
return (0);
941
}
942
943
xmlOutputBufferWriteString(ctx->buf, " ");
944
if (attr->ns != NULL && xmlStrlen(attr->ns->prefix) > 0) {
945
xmlOutputBufferWriteString(ctx->buf,
946
(const char *) attr->ns->prefix);
947
xmlOutputBufferWriteString(ctx->buf, ":");
948
}
949
xmlOutputBufferWriteString(ctx->buf, (const char *) attr->name);
950
xmlOutputBufferWriteString(ctx->buf, "=\"");
951
952
value = xmlNodeListGetString(ctx->doc, attr->children, 1);
953
/* todo: should we log an error if value==NULL ? */
954
if (value != NULL) {
955
buffer = xmlC11NNormalizeAttr(value);
956
xmlFree(value);
957
if (buffer != NULL) {
958
xmlOutputBufferWriteString(ctx->buf, (const char *) buffer);
959
xmlFree(buffer);
960
} else {
961
xmlC14NErrInternal("normalizing attributes axis");
962
return (0);
963
}
964
}
965
xmlOutputBufferWriteString(ctx->buf, "\"");
966
return (1);
967
}
968
969
/**
970
* xmlC14NFindHiddenParentAttr:
971
*
972
* Finds an attribute in a hidden parent node.
973
*
974
* Returns a pointer to the attribute node (if found) or NULL otherwise.
975
*/
976
static xmlAttrPtr
977
xmlC14NFindHiddenParentAttr(xmlC14NCtxPtr ctx, xmlNodePtr cur, const xmlChar * name, const xmlChar * ns)
978
{
979
xmlAttrPtr res;
980
while((cur != NULL) && (!xmlC14NIsVisible(ctx, cur, cur->parent))) {
981
res = xmlHasNsProp(cur, name, ns);
982
if(res != NULL) {
983
return res;
984
}
985
986
cur = cur->parent;
987
}
988
989
return NULL;
990
}
991
992
/**
993
* xmlC14NFixupBaseAttr:
994
*
995
* Fixes up the xml:base attribute
996
*
997
* Returns the newly created attribute or NULL
998
*/
999
static xmlAttrPtr
1000
xmlC14NFixupBaseAttr(xmlC14NCtxPtr ctx, xmlAttrPtr xml_base_attr)
1001
{
1002
xmlChar * res = NULL;
1003
xmlNodePtr cur;
1004
xmlAttrPtr attr;
1005
xmlChar * tmp_str;
1006
xmlChar * tmp_str2;
1007
int tmp_str_len;
1008
1009
if ((ctx == NULL) || (xml_base_attr == NULL) || (xml_base_attr->parent == NULL)) {
1010
xmlC14NErrParam("processing xml:base attribute");
1011
return (NULL);
1012
}
1013
1014
/* start from current value */
1015
res = xmlNodeListGetString(ctx->doc, xml_base_attr->children, 1);
1016
if(res == NULL) {
1017
xmlC14NErrInternal("processing xml:base attribute - can't get attr value");
1018
return (NULL);
1019
}
1020
1021
/* go up the stack until we find a node that we rendered already */
1022
cur = xml_base_attr->parent->parent;
1023
while((cur != NULL) && (!xmlC14NIsVisible(ctx, cur, cur->parent))) {
1024
attr = xmlHasNsProp(cur, BAD_CAST "base", XML_XML_NAMESPACE);
1025
if(attr != NULL) {
1026
/* get attr value */
1027
tmp_str = xmlNodeListGetString(ctx->doc, attr->children, 1);
1028
if(tmp_str == NULL) {
1029
xmlFree(res);
1030
1031
xmlC14NErrInternal("processing xml:base attribute - can't get attr value");
1032
return (NULL);
1033
}
1034
1035
/* we need to add '/' if our current base uri ends with '..' or '.'
1036
to ensure that we are forced to go "up" all the time */
1037
tmp_str_len = xmlStrlen(tmp_str);
1038
if(tmp_str_len > 1 && tmp_str[tmp_str_len - 2] == '.') {
1039
tmp_str2 = xmlStrcat(tmp_str, BAD_CAST "/");
1040
if(tmp_str2 == NULL) {
1041
xmlFree(tmp_str);
1042
xmlFree(res);
1043
1044
xmlC14NErrInternal("processing xml:base attribute - can't modify uri");
1045
return (NULL);
1046
}
1047
1048
tmp_str = tmp_str2;
1049
}
1050
1051
/* build uri */
1052
tmp_str2 = xmlBuildURI(res, tmp_str);
1053
if(tmp_str2 == NULL) {
1054
xmlFree(tmp_str);
1055
xmlFree(res);
1056
1057
xmlC14NErrInternal("processing xml:base attribute - can't construct uri");
1058
return (NULL);
1059
}
1060
1061
/* cleanup and set the new res */
1062
xmlFree(tmp_str);
1063
xmlFree(res);
1064
res = tmp_str2;
1065
}
1066
1067
/* next */
1068
cur = cur->parent;
1069
}
1070
1071
/* check if result uri is empty or not */
1072
if((res == NULL) || xmlStrEqual(res, BAD_CAST "")) {
1073
xmlFree(res);
1074
return (NULL);
1075
}
1076
1077
/* create and return the new attribute node */
1078
attr = xmlNewNsProp(NULL, xml_base_attr->ns, BAD_CAST "base", res);
1079
if(attr == NULL) {
1080
xmlFree(res);
1081
1082
xmlC14NErrInternal("processing xml:base attribute - can't construct attribute");
1083
return (NULL);
1084
}
1085
1086
/* done */
1087
xmlFree(res);
1088
return (attr);
1089
}
1090
1091
/**
1092
* xmlC14NProcessAttrsAxis:
1093
* @ctx: the C14N context
1094
* @cur: the current node
1095
* @parent_visible: the visibility of parent node
1096
* @all_parents_visible: the visibility of all parent nodes
1097
*
1098
* Prints out canonical attribute axis of the current node to the
1099
* buffer from C14N context as follows
1100
*
1101
* Canonical XML v 1.0 (http://www.w3.org/TR/xml-c14n)
1102
*
1103
* Attribute Axis
1104
* In lexicographic order (ascending), process each node that
1105
* is in the element's attribute axis and in the node-set.
1106
*
1107
* The processing of an element node E MUST be modified slightly
1108
* when an XPath node-set is given as input and the element's
1109
* parent is omitted from the node-set.
1110
*
1111
*
1112
* Exclusive XML Canonicalization v 1.0 (http://www.w3.org/TR/xml-exc-c14n)
1113
*
1114
* Canonical XML applied to a document subset requires the search of the
1115
* ancestor nodes of each orphan element node for attributes in the xml
1116
* namespace, such as xml:lang and xml:space. These are copied into the
1117
* element node except if a declaration of the same attribute is already
1118
* in the attribute axis of the element (whether or not it is included in
1119
* the document subset). This search and copying are omitted from the
1120
* Exclusive XML Canonicalization method.
1121
*
1122
* Returns 0 on success or -1 on fail.
1123
*/
1124
static int
1125
xmlC14NProcessAttrsAxis(xmlC14NCtxPtr ctx, xmlNodePtr cur, int parent_visible)
1126
{
1127
xmlAttrPtr attr;
1128
xmlListPtr list;
1129
xmlAttrPtr attrs_to_delete = NULL;
1130
1131
/* special processing for 1.1 spec */
1132
xmlAttrPtr xml_base_attr = NULL;
1133
xmlAttrPtr xml_lang_attr = NULL;
1134
xmlAttrPtr xml_space_attr = NULL;
1135
1136
if ((ctx == NULL) || (cur == NULL) || (cur->type != XML_ELEMENT_NODE)) {
1137
xmlC14NErrParam("processing attributes axis");
1138
return (-1);
1139
}
1140
1141
/*
1142
* Create a sorted list to store element attributes
1143
*/
1144
list = xmlListCreate(NULL, (xmlListDataCompare) xmlC14NAttrsCompare);
1145
if (list == NULL) {
1146
xmlC14NErrInternal("creating attributes list");
1147
return (-1);
1148
}
1149
1150
switch(ctx->mode) {
1151
case XML_C14N_1_0:
1152
/* The processing of an element node E MUST be modified slightly when an XPath node-set is
1153
* given as input and the element's parent is omitted from the node-set. The method for processing
1154
* the attribute axis of an element E in the node-set is enhanced. All element nodes along E's
1155
* ancestor axis are examined for nearest occurrences of attributes in the xml namespace, such
1156
* as xml:lang and xml:space (whether or not they are in the node-set). From this list of attributes,
1157
* remove any that are in E's attribute axis (whether or not they are in the node-set). Then,
1158
* lexicographically merge this attribute list with the nodes of E's attribute axis that are in
1159
* the node-set. The result of visiting the attribute axis is computed by processing the attribute
1160
* nodes in this merged attribute list.
1161
*/
1162
1163
/*
1164
* Add all visible attributes from current node.
1165
*/
1166
attr = cur->properties;
1167
while (attr != NULL) {
1168
/* check that attribute is visible */
1169
if (xmlC14NIsVisible(ctx, attr, cur)) {
1170
xmlListInsert(list, attr);
1171
}
1172
attr = attr->next;
1173
}
1174
1175
/*
1176
* Handle xml attributes
1177
*/
1178
if (parent_visible && (cur->parent != NULL) &&
1179
(!xmlC14NIsVisible(ctx, cur->parent, cur->parent->parent)))
1180
{
1181
xmlNodePtr tmp;
1182
1183
/*
1184
* If XPath node-set is not specified then the parent is always
1185
* visible!
1186
*/
1187
tmp = cur->parent;
1188
while (tmp != NULL) {
1189
attr = tmp->properties;
1190
while (attr != NULL) {
1191
if (xmlC14NIsXmlAttr(attr) != 0) {
1192
if (xmlListSearch(list, attr) == NULL) {
1193
xmlListInsert(list, attr);
1194
}
1195
}
1196
attr = attr->next;
1197
}
1198
tmp = tmp->parent;
1199
}
1200
}
1201
1202
/* done */
1203
break;
1204
case XML_C14N_EXCLUSIVE_1_0:
1205
/* attributes in the XML namespace, such as xml:lang and xml:space
1206
* are not imported into orphan nodes of the document subset
1207
*/
1208
1209
/*
1210
* Add all visible attributes from current node.
1211
*/
1212
attr = cur->properties;
1213
while (attr != NULL) {
1214
/* check that attribute is visible */
1215
if (xmlC14NIsVisible(ctx, attr, cur)) {
1216
xmlListInsert(list, attr);
1217
}
1218
attr = attr->next;
1219
}
1220
1221
/* do nothing special for xml attributes */
1222
break;
1223
case XML_C14N_1_1:
1224
/* The processing of an element node E MUST be modified slightly when an XPath node-set is
1225
* given as input and some of the element's ancestors are omitted from the node-set.
1226
*
1227
* Simple inheritable attributes are attributes that have a value that requires at most a simple
1228
* redeclaration. This redeclaration is done by supplying a new value in the child axis. The
1229
* redeclaration of a simple inheritable attribute A contained in one of E's ancestors is done
1230
* by supplying a value to an attribute Ae inside E with the same name. Simple inheritable attributes
1231
* are xml:lang and xml:space.
1232
*
1233
* The method for processing the attribute axis of an element E in the node-set is hence enhanced.
1234
* All element nodes along E's ancestor axis are examined for the nearest occurrences of simple
1235
* inheritable attributes in the xml namespace, such as xml:lang and xml:space (whether or not they
1236
* are in the node-set). From this list of attributes, any simple inheritable attributes that are
1237
* already in E's attribute axis (whether or not they are in the node-set) are removed. Then,
1238
* lexicographically merge this attribute list with the nodes of E's attribute axis that are in
1239
* the node-set. The result of visiting the attribute axis is computed by processing the attribute
1240
* nodes in this merged attribute list.
1241
*
1242
* The xml:id attribute is not a simple inheritable attribute and no processing of these attributes is
1243
* performed.
1244
*
1245
* The xml:base attribute is not a simple inheritable attribute and requires special processing beyond
1246
* a simple redeclaration.
1247
*
1248
* Attributes in the XML namespace other than xml:base, xml:id, xml:lang, and xml:space MUST be processed
1249
* as ordinary attributes.
1250
*/
1251
1252
/*
1253
* Add all visible attributes from current node.
1254
*/
1255
attr = cur->properties;
1256
while (attr != NULL) {
1257
/* special processing for XML attribute kiks in only when we have invisible parents */
1258
if ((!parent_visible) || (xmlC14NIsXmlAttr(attr) == 0)) {
1259
/* check that attribute is visible */
1260
if (xmlC14NIsVisible(ctx, attr, cur)) {
1261
xmlListInsert(list, attr);
1262
}
1263
} else {
1264
int matched = 0;
1265
1266
/* check for simple inheritance attributes */
1267
if((!matched) && (xml_lang_attr == NULL) && xmlStrEqual(attr->name, BAD_CAST "lang")) {
1268
xml_lang_attr = attr;
1269
matched = 1;
1270
}
1271
if((!matched) && (xml_space_attr == NULL) && xmlStrEqual(attr->name, BAD_CAST "space")) {
1272
xml_space_attr = attr;
1273
matched = 1;
1274
}
1275
1276
/* check for base attr */
1277
if((!matched) && (xml_base_attr == NULL) && xmlStrEqual(attr->name, BAD_CAST "base")) {
1278
xml_base_attr = attr;
1279
matched = 1;
1280
}
1281
1282
/* otherwise, it is a normal attribute, so just check if it is visible */
1283
if((!matched) && xmlC14NIsVisible(ctx, attr, cur)) {
1284
xmlListInsert(list, attr);
1285
}
1286
}
1287
1288
/* move to the next one */
1289
attr = attr->next;
1290
}
1291
1292
/* special processing for XML attribute kiks in only when we have invisible parents */
1293
if ((parent_visible)) {
1294
1295
/* simple inheritance attributes - copy */
1296
if(xml_lang_attr == NULL) {
1297
xml_lang_attr = xmlC14NFindHiddenParentAttr(ctx, cur->parent, BAD_CAST "lang", XML_XML_NAMESPACE);
1298
}
1299
if(xml_lang_attr != NULL) {
1300
xmlListInsert(list, xml_lang_attr);
1301
}
1302
if(xml_space_attr == NULL) {
1303
xml_space_attr = xmlC14NFindHiddenParentAttr(ctx, cur->parent, BAD_CAST "space", XML_XML_NAMESPACE);
1304
}
1305
if(xml_space_attr != NULL) {
1306
xmlListInsert(list, xml_space_attr);
1307
}
1308
1309
/* base uri attribute - fix up */
1310
if(xml_base_attr == NULL) {
1311
/* if we don't have base uri attribute, check if we have a "hidden" one above */
1312
xml_base_attr = xmlC14NFindHiddenParentAttr(ctx, cur->parent, BAD_CAST "base", XML_XML_NAMESPACE);
1313
}
1314
if(xml_base_attr != NULL) {
1315
xml_base_attr = xmlC14NFixupBaseAttr(ctx, xml_base_attr);
1316
if(xml_base_attr != NULL) {
1317
xmlListInsert(list, xml_base_attr);
1318
1319
/* note that we MUST delete returned attr node ourselves! */
1320
xml_base_attr->next = attrs_to_delete;
1321
attrs_to_delete = xml_base_attr;
1322
}
1323
}
1324
}
1325
1326
/* done */
1327
break;
1328
}
1329
1330
/*
1331
* print out all elements from list
1332
*/
1333
xmlListWalk(list, (xmlListWalker) xmlC14NPrintAttrs, (const void *) ctx);
1334
1335
/*
1336
* Cleanup
1337
*/
1338
xmlFreePropList(attrs_to_delete);
1339
xmlListDelete(list);
1340
return (0);
1341
}
1342
1343
/**
1344
* xmlC14NCheckForRelativeNamespaces:
1345
* @ctx: the C14N context
1346
* @cur: the current element node
1347
*
1348
* Checks that current element node has no relative namespaces defined
1349
*
1350
* Returns 0 if the node has no relative namespaces or -1 otherwise.
1351
*/
1352
static int
1353
xmlC14NCheckForRelativeNamespaces(xmlC14NCtxPtr ctx, xmlNodePtr cur)
1354
{
1355
xmlNsPtr ns;
1356
1357
if ((ctx == NULL) || (cur == NULL) || (cur->type != XML_ELEMENT_NODE)) {
1358
xmlC14NErrParam("checking for relative namespaces");
1359
return (-1);
1360
}
1361
1362
ns = cur->nsDef;
1363
while (ns != NULL) {
1364
if (xmlStrlen(ns->href) > 0) {
1365
xmlURIPtr uri;
1366
1367
uri = xmlParseURI((const char *) ns->href);
1368
if (uri == NULL) {
1369
xmlC14NErrInternal("parsing namespace uri");
1370
return (-1);
1371
}
1372
if (xmlStrlen((const xmlChar *) uri->scheme) == 0) {
1373
xmlC14NErrRelativeNamespace(uri->scheme);
1374
xmlFreeURI(uri);
1375
return (-1);
1376
}
1377
if ((xmlStrcasecmp((const xmlChar *) uri->scheme, BAD_CAST "urn") != 0)
1378
&& (xmlStrcasecmp((const xmlChar *) uri->scheme, BAD_CAST "dav") !=0)
1379
&& (xmlStrlen((const xmlChar *) uri->server) == 0)) {
1380
xmlC14NErrRelativeNamespace(uri->scheme);
1381
xmlFreeURI(uri);
1382
return (-1);
1383
}
1384
xmlFreeURI(uri);
1385
}
1386
ns = ns->next;
1387
}
1388
return (0);
1389
}
1390
1391
/**
1392
* xmlC14NProcessElementNode:
1393
* @ctx: the pointer to C14N context object
1394
* @cur: the node to process
1395
* @visible: this node is visible
1396
* @all_parents_visible: whether all the parents of this node are visible
1397
*
1398
* Canonical XML v 1.0 (http://www.w3.org/TR/xml-c14n)
1399
*
1400
* Element Nodes
1401
* If the element is not in the node-set, then the result is obtained
1402
* by processing the namespace axis, then the attribute axis, then
1403
* processing the child nodes of the element that are in the node-set
1404
* (in document order). If the element is in the node-set, then the result
1405
* is an open angle bracket (<), the element QName, the result of
1406
* processing the namespace axis, the result of processing the attribute
1407
* axis, a close angle bracket (>), the result of processing the child
1408
* nodes of the element that are in the node-set (in document order), an
1409
* open angle bracket, a forward slash (/), the element QName, and a close
1410
* angle bracket.
1411
*
1412
* Returns non-negative value on success or negative value on fail
1413
*/
1414
static int
1415
xmlC14NProcessElementNode(xmlC14NCtxPtr ctx, xmlNodePtr cur, int visible)
1416
{
1417
int ret;
1418
xmlC14NVisibleNsStack state;
1419
int parent_is_doc = 0;
1420
1421
if ((ctx == NULL) || (cur == NULL) || (cur->type != XML_ELEMENT_NODE)) {
1422
xmlC14NErrParam("processing element node");
1423
return (-1);
1424
}
1425
1426
/*
1427
* Check relative relative namespaces:
1428
* implementations of XML canonicalization MUST report an operation
1429
* failure on documents containing relative namespace URIs.
1430
*/
1431
if (xmlC14NCheckForRelativeNamespaces(ctx, cur) < 0) {
1432
xmlC14NErrInternal("checking for relative namespaces");
1433
return (-1);
1434
}
1435
1436
1437
/*
1438
* Save ns_rendered stack position
1439
*/
1440
memset(&state, 0, sizeof(state));
1441
xmlC14NVisibleNsStackSave(ctx->ns_rendered, &state);
1442
1443
if (visible) {
1444
if (ctx->parent_is_doc) {
1445
/* save this flag into the stack */
1446
parent_is_doc = ctx->parent_is_doc;
1447
ctx->parent_is_doc = 0;
1448
ctx->pos = XMLC14N_INSIDE_DOCUMENT_ELEMENT;
1449
}
1450
xmlOutputBufferWriteString(ctx->buf, "<");
1451
1452
if ((cur->ns != NULL) && (xmlStrlen(cur->ns->prefix) > 0)) {
1453
xmlOutputBufferWriteString(ctx->buf,
1454
(const char *) cur->ns->prefix);
1455
xmlOutputBufferWriteString(ctx->buf, ":");
1456
}
1457
xmlOutputBufferWriteString(ctx->buf, (const char *) cur->name);
1458
}
1459
1460
if (!xmlC14NIsExclusive(ctx)) {
1461
ret = xmlC14NProcessNamespacesAxis(ctx, cur, visible);
1462
} else {
1463
ret = xmlExcC14NProcessNamespacesAxis(ctx, cur, visible);
1464
}
1465
if (ret < 0) {
1466
xmlC14NErrInternal("processing namespaces axis");
1467
return (-1);
1468
}
1469
/* todo: shouldn't this go to "visible only"? */
1470
if(visible) {
1471
xmlC14NVisibleNsStackShift(ctx->ns_rendered);
1472
}
1473
1474
ret = xmlC14NProcessAttrsAxis(ctx, cur, visible);
1475
if (ret < 0) {
1476
xmlC14NErrInternal("processing attributes axis");
1477
return (-1);
1478
}
1479
1480
if (visible) {
1481
xmlOutputBufferWriteString(ctx->buf, ">");
1482
}
1483
if (cur->children != NULL) {
1484
ret = xmlC14NProcessNodeList(ctx, cur->children);
1485
if (ret < 0) {
1486
xmlC14NErrInternal("processing childrens list");
1487
return (-1);
1488
}
1489
}
1490
if (visible) {
1491
xmlOutputBufferWriteString(ctx->buf, "</");
1492
if ((cur->ns != NULL) && (xmlStrlen(cur->ns->prefix) > 0)) {
1493
xmlOutputBufferWriteString(ctx->buf,
1494
(const char *) cur->ns->prefix);
1495
xmlOutputBufferWriteString(ctx->buf, ":");
1496
}
1497
xmlOutputBufferWriteString(ctx->buf, (const char *) cur->name);
1498
xmlOutputBufferWriteString(ctx->buf, ">");
1499
if (parent_is_doc) {
1500
/* restore this flag from the stack for next node */
1501
ctx->parent_is_doc = parent_is_doc;
1502
ctx->pos = XMLC14N_AFTER_DOCUMENT_ELEMENT;
1503
}
1504
}
1505
1506
/*
1507
* Restore ns_rendered stack position
1508
*/
1509
xmlC14NVisibleNsStackRestore(ctx->ns_rendered, &state);
1510
return (0);
1511
}
1512
1513
/**
1514
* xmlC14NProcessNode:
1515
* @ctx: the pointer to C14N context object
1516
* @cur: the node to process
1517
*
1518
* Processes the given node
1519
*
1520
* Returns non-negative value on success or negative value on fail
1521
*/
1522
static int
1523
xmlC14NProcessNode(xmlC14NCtxPtr ctx, xmlNodePtr cur)
1524
{
1525
int ret = 0;
1526
int visible;
1527
1528
if ((ctx == NULL) || (cur == NULL)) {
1529
xmlC14NErrParam("processing node");
1530
return (-1);
1531
}
1532
1533
visible = xmlC14NIsVisible(ctx, cur, cur->parent);
1534
switch (cur->type) {
1535
case XML_ELEMENT_NODE:
1536
ret = xmlC14NProcessElementNode(ctx, cur, visible);
1537
break;
1538
case XML_CDATA_SECTION_NODE:
1539
case XML_TEXT_NODE:
1540
/*
1541
* Text Nodes
1542
* the string value, except all ampersands are replaced
1543
* by &, all open angle brackets (<) are replaced by <, all closing
1544
* angle brackets (>) are replaced by >, and all #xD characters are
1545
* replaced by 
.
1546
*/
1547
/* cdata sections are processed as text nodes */
1548
/* todo: verify that cdata sections are included in XPath nodes set */
1549
if ((visible) && (cur->content != NULL)) {
1550
xmlChar *buffer;
1551
1552
buffer = xmlC11NNormalizeText(cur->content);
1553
if (buffer != NULL) {
1554
xmlOutputBufferWriteString(ctx->buf,
1555
(const char *) buffer);
1556
xmlFree(buffer);
1557
} else {
1558
xmlC14NErrInternal("normalizing text node");
1559
return (-1);
1560
}
1561
}
1562
break;
1563
case XML_PI_NODE:
1564
/*
1565
* Processing Instruction (PI) Nodes-
1566
* The opening PI symbol (<?), the PI target name of the node,
1567
* a leading space and the string value if it is not empty, and
1568
* the closing PI symbol (?>). If the string value is empty,
1569
* then the leading space is not added. Also, a trailing #xA is
1570
* rendered after the closing PI symbol for PI children of the
1571
* root node with a lesser document order than the document
1572
* element, and a leading #xA is rendered before the opening PI
1573
* symbol of PI children of the root node with a greater document
1574
* order than the document element.
1575
*/
1576
if (visible) {
1577
if (ctx->pos == XMLC14N_AFTER_DOCUMENT_ELEMENT) {
1578
xmlOutputBufferWriteString(ctx->buf, "\x0A<?");
1579
} else {
1580
xmlOutputBufferWriteString(ctx->buf, "<?");
1581
}
1582
1583
xmlOutputBufferWriteString(ctx->buf,
1584
(const char *) cur->name);
1585
if ((cur->content != NULL) && (*(cur->content) != '\0')) {
1586
xmlChar *buffer;
1587
1588
xmlOutputBufferWriteString(ctx->buf, " ");
1589
1590
/* todo: do we need to normalize pi? */
1591
buffer = xmlC11NNormalizePI(cur->content);
1592
if (buffer != NULL) {
1593
xmlOutputBufferWriteString(ctx->buf,
1594
(const char *) buffer);
1595
xmlFree(buffer);
1596
} else {
1597
xmlC14NErrInternal("normalizing pi node");
1598
return (-1);
1599
}
1600
}
1601
1602
if (ctx->pos == XMLC14N_BEFORE_DOCUMENT_ELEMENT) {
1603
xmlOutputBufferWriteString(ctx->buf, "?>\x0A");
1604
} else {
1605
xmlOutputBufferWriteString(ctx->buf, "?>");
1606
}
1607
}
1608
break;
1609
case XML_COMMENT_NODE:
1610
/*
1611
* Comment Nodes
1612
* Nothing if generating canonical XML without comments. For
1613
* canonical XML with comments, generate the opening comment
1614
* symbol (<!--), the string value of the node, and the
1615
* closing comment symbol (-->). Also, a trailing #xA is rendered
1616
* after the closing comment symbol for comment children of the
1617
* root node with a lesser document order than the document
1618
* element, and a leading #xA is rendered before the opening
1619
* comment symbol of comment children of the root node with a
1620
* greater document order than the document element. (Comment
1621
* children of the root node represent comments outside of the
1622
* top-level document element and outside of the document type
1623
* declaration).
1624
*/
1625
if (visible && ctx->with_comments) {
1626
if (ctx->pos == XMLC14N_AFTER_DOCUMENT_ELEMENT) {
1627
xmlOutputBufferWriteString(ctx->buf, "\x0A<!--");
1628
} else {
1629
xmlOutputBufferWriteString(ctx->buf, "<!--");
1630
}
1631
1632
if (cur->content != NULL) {
1633
xmlChar *buffer;
1634
1635
/* todo: do we need to normalize comment? */
1636
buffer = xmlC11NNormalizeComment(cur->content);
1637
if (buffer != NULL) {
1638
xmlOutputBufferWriteString(ctx->buf,
1639
(const char *) buffer);
1640
xmlFree(buffer);
1641
} else {
1642
xmlC14NErrInternal("normalizing comment node");
1643
return (-1);
1644
}
1645
}
1646
1647
if (ctx->pos == XMLC14N_BEFORE_DOCUMENT_ELEMENT) {
1648
xmlOutputBufferWriteString(ctx->buf, "-->\x0A");
1649
} else {
1650
xmlOutputBufferWriteString(ctx->buf, "-->");
1651
}
1652
}
1653
break;
1654
case XML_DOCUMENT_NODE:
1655
case XML_DOCUMENT_FRAG_NODE: /* should be processed as document? */
1656
#ifdef LIBXML_DOCB_ENABLED
1657
case XML_DOCB_DOCUMENT_NODE: /* should be processed as document? */
1658
#endif
1659
#ifdef LIBXML_HTML_ENABLED
1660
case XML_HTML_DOCUMENT_NODE: /* should be processed as document? */
1661
#endif
1662
if (cur->children != NULL) {
1663
ctx->pos = XMLC14N_BEFORE_DOCUMENT_ELEMENT;
1664
ctx->parent_is_doc = 1;
1665
ret = xmlC14NProcessNodeList(ctx, cur->children);
1666
}
1667
break;
1668
1669
case XML_ATTRIBUTE_NODE:
1670
xmlC14NErrInvalidNode("XML_ATTRIBUTE_NODE", "processing node");
1671
return (-1);
1672
case XML_NAMESPACE_DECL:
1673
xmlC14NErrInvalidNode("XML_NAMESPACE_DECL", "processing node");
1674
return (-1);
1675
case XML_ENTITY_REF_NODE:
1676
xmlC14NErrInvalidNode("XML_ENTITY_REF_NODE", "processing node");
1677
return (-1);
1678
case XML_ENTITY_NODE:
1679
xmlC14NErrInvalidNode("XML_ENTITY_NODE", "processing node");
1680
return (-1);
1681
1682
case XML_DOCUMENT_TYPE_NODE:
1683
case XML_NOTATION_NODE:
1684
case XML_DTD_NODE:
1685
case XML_ELEMENT_DECL:
1686
case XML_ATTRIBUTE_DECL:
1687
case XML_ENTITY_DECL:
1688
#ifdef LIBXML_XINCLUDE_ENABLED
1689
case XML_XINCLUDE_START:
1690
case XML_XINCLUDE_END:
1691
#endif
1692
/*
1693
* should be ignored according to "W3C Canonical XML"
1694
*/
1695
break;
1696
default:
1697
xmlC14NErrUnknownNode(cur->type, "processing node");
1698
return (-1);
1699
}
1700
1701
return (ret);
1702
}
1703
1704
/**
1705
* xmlC14NProcessNodeList:
1706
* @ctx: the pointer to C14N context object
1707
* @cur: the node to start from
1708
*
1709
* Processes all nodes in the row starting from cur.
1710
*
1711
* Returns non-negative value on success or negative value on fail
1712
*/
1713
static int
1714
xmlC14NProcessNodeList(xmlC14NCtxPtr ctx, xmlNodePtr cur)
1715
{
1716
int ret;
1717
1718
if (ctx == NULL) {
1719
xmlC14NErrParam("processing node list");
1720
return (-1);
1721
}
1722
1723
for (ret = 0; cur != NULL && ret >= 0; cur = cur->next) {
1724
ret = xmlC14NProcessNode(ctx, cur);
1725
}
1726
return (ret);
1727
}
1728
1729
1730
/**
1731
* xmlC14NFreeCtx:
1732
* @ctx: the pointer to C14N context object
1733
*
1734
* Cleanups the C14N context object.
1735
*/
1736
1737
static void
1738
xmlC14NFreeCtx(xmlC14NCtxPtr ctx)
1739
{
1740
if (ctx == NULL) {
1741
xmlC14NErrParam("freeing context");
1742
return;
1743
}
1744
1745
if (ctx->ns_rendered != NULL) {
1746
xmlC14NVisibleNsStackDestroy(ctx->ns_rendered);
1747
}
1748
xmlFree(ctx);
1749
}
1750
1751
/**
1752
* xmlC14NNewCtx:
1753
* @doc: the XML document for canonization
1754
* @is_visible_callback:the function to use to determine is node visible
1755
* or not
1756
* @user_data: the first parameter for @is_visible_callback function
1757
* (in most cases, it is nodes set)
1758
* @mode: the c14n mode (see @xmlC14NMode)
1759
* @inclusive_ns_prefixe the list of inclusive namespace prefixes
1760
* ended with a NULL or NULL if there is no
1761
* inclusive namespaces (only for `
1762
* canonicalization)
1763
* @with_comments: include comments in the result (!=0) or not (==0)
1764
* @buf: the output buffer to store canonical XML; this
1765
* buffer MUST have encoder==NULL because C14N requires
1766
* UTF-8 output
1767
*
1768
* Creates new C14N context object to store C14N parameters.
1769
*
1770
* Returns pointer to newly created object (success) or NULL (fail)
1771
*/
1772
static xmlC14NCtxPtr
1773
xmlC14NNewCtx(xmlDocPtr doc,
1774
xmlC14NIsVisibleCallback is_visible_callback, void* user_data,
1775
xmlC14NMode mode, xmlChar ** inclusive_ns_prefixes,
1776
int with_comments, xmlOutputBufferPtr buf)
1777
{
1778
xmlC14NCtxPtr ctx = NULL;
1779
1780
if ((doc == NULL) || (buf == NULL)) {
1781
xmlC14NErrParam("creating new context");
1782
return (NULL);
1783
}
1784
1785
/*
1786
* Validate the encoding output buffer encoding
1787
*/
1788
if (buf->encoder != NULL) {
1789
xmlC14NErr(ctx, (xmlNodePtr) doc, XML_C14N_REQUIRES_UTF8,
1790
"xmlC14NNewCtx: output buffer encoder != NULL but C14N requires UTF8 output\n");
1791
return (NULL);
1792
}
1793
1794
/*
1795
* Validate the XML document encoding value, if provided.
1796
*/
1797
if (doc->charset != XML_CHAR_ENCODING_UTF8) {
1798
xmlC14NErr(ctx, (xmlNodePtr) doc, XML_C14N_REQUIRES_UTF8,
1799
"xmlC14NNewCtx: source document not in UTF8\n");
1800
return (NULL);
1801
}
1802
1803
/*
1804
* Allocate a new xmlC14NCtxPtr and fill the fields.
1805
*/
1806
ctx = (xmlC14NCtxPtr) xmlMalloc(sizeof(xmlC14NCtx));
1807
if (ctx == NULL) {
1808
xmlC14NErrMemory("creating context");
1809
return (NULL);
1810
}
1811
memset(ctx, 0, sizeof(xmlC14NCtx));
1812
1813
/*
1814
* initialize C14N context
1815
*/
1816
ctx->doc = doc;
1817
ctx->with_comments = with_comments;
1818
ctx->is_visible_callback = is_visible_callback;
1819
ctx->user_data = user_data;
1820
ctx->buf = buf;
1821
ctx->parent_is_doc = 1;
1822
ctx->pos = XMLC14N_BEFORE_DOCUMENT_ELEMENT;
1823
ctx->ns_rendered = xmlC14NVisibleNsStackCreate();
1824
1825
if(ctx->ns_rendered == NULL) {
1826
xmlC14NErr(ctx, (xmlNodePtr) doc, XML_C14N_CREATE_STACK,
1827
"xmlC14NNewCtx: xmlC14NVisibleNsStackCreate failed\n");
1828
xmlC14NFreeCtx(ctx);
1829
return (NULL);
1830
}
1831
1832
/*
1833
* Set "mode" flag and remember list of incluseve prefixes
1834
* for exclusive c14n
1835
*/
1836
ctx->mode = mode;
1837
if(xmlC14NIsExclusive(ctx)) {
1838
ctx->inclusive_ns_prefixes = inclusive_ns_prefixes;
1839
}
1840
return (ctx);
1841
}
1842
1843
/**
1844
* xmlC14NExecute:
1845
* @doc: the XML document for canonization
1846
* @is_visible_callback:the function to use to determine is node visible
1847
* or not
1848
* @user_data: the first parameter for @is_visible_callback function
1849
* (in most cases, it is nodes set)
1850
* @mode: the c14n mode (see @xmlC14NMode)
1851
* @inclusive_ns_prefixes: the list of inclusive namespace prefixes
1852
* ended with a NULL or NULL if there is no
1853
* inclusive namespaces (only for exclusive
1854
* canonicalization, ignored otherwise)
1855
* @with_comments: include comments in the result (!=0) or not (==0)
1856
* @buf: the output buffer to store canonical XML; this
1857
* buffer MUST have encoder==NULL because C14N requires
1858
* UTF-8 output
1859
*
1860
* Dumps the canonized image of given XML document into the provided buffer.
1861
* For details see "Canonical XML" (http://www.w3.org/TR/xml-c14n) or
1862
* "Exclusive XML Canonicalization" (http://www.w3.org/TR/xml-exc-c14n)
1863
*
1864
* Returns non-negative value on success or a negative value on fail
1865
*/
1866
int
1867
xmlC14NExecute(xmlDocPtr doc, xmlC14NIsVisibleCallback is_visible_callback,
1868
void* user_data, int mode, xmlChar **inclusive_ns_prefixes,
1869
int with_comments, xmlOutputBufferPtr buf) {
1870
1871
xmlC14NCtxPtr ctx;
1872
xmlC14NMode c14n_mode = XML_C14N_1_0;
1873
int ret;
1874
1875
if ((buf == NULL) || (doc == NULL)) {
1876
xmlC14NErrParam("executing c14n");
1877
return (-1);
1878
}
1879
1880
/* for backward compatibility, we have to have "mode" as "int"
1881
and here we check that user gives valid value */
1882
switch(mode) {
1883
case XML_C14N_1_0:
1884
case XML_C14N_EXCLUSIVE_1_0:
1885
case XML_C14N_1_1:
1886
c14n_mode = (xmlC14NMode)mode;
1887
break;
1888
default:
1889
xmlC14NErrParam("invalid mode for executing c14n");
1890
return (-1);
1891
}
1892
1893
/*
1894
* Validate the encoding output buffer encoding
1895
*/
1896
if (buf->encoder != NULL) {
1897
xmlC14NErr(NULL, (xmlNodePtr) doc, XML_C14N_REQUIRES_UTF8,
1898
"xmlC14NExecute: output buffer encoder != NULL but C14N requires UTF8 output\n");
1899
return (-1);
1900
}
1901
1902
ctx = xmlC14NNewCtx(doc, is_visible_callback, user_data,
1903
c14n_mode, inclusive_ns_prefixes,
1904
with_comments, buf);
1905
if (ctx == NULL) {
1906
xmlC14NErr(NULL, (xmlNodePtr) doc, XML_C14N_CREATE_CTXT,
1907
"xmlC14NExecute: unable to create C14N context\n");
1908
return (-1);
1909
}
1910
1911
1912
1913
/*
1914
* Root Node
1915
* The root node is the parent of the top-level document element. The
1916
* result of processing each of its child nodes that is in the node-set
1917
* in document order. The root node does not generate a byte order mark,
1918
* XML declaration, nor anything from within the document type
1919
* declaration.
1920
*/
1921
if (doc->children != NULL) {
1922
ret = xmlC14NProcessNodeList(ctx, doc->children);
1923
if (ret < 0) {
1924
xmlC14NErrInternal("processing docs children list");
1925
xmlC14NFreeCtx(ctx);
1926
return (-1);
1927
}
1928
}
1929
1930
/*
1931
* Flush buffer to get number of bytes written
1932
*/
1933
ret = xmlOutputBufferFlush(buf);
1934
if (ret < 0) {
1935
xmlC14NErrInternal("flushing output buffer");
1936
xmlC14NFreeCtx(ctx);
1937
return (-1);
1938
}
1939
1940
/*
1941
* Cleanup
1942
*/
1943
xmlC14NFreeCtx(ctx);
1944
return (ret);
1945
}
1946
1947
/**
1948
* xmlC14NDocSaveTo:
1949
* @doc: the XML document for canonization
1950
* @nodes: the nodes set to be included in the canonized image
1951
* or NULL if all document nodes should be included
1952
* @mode: the c14n mode (see @xmlC14NMode)
1953
* @inclusive_ns_prefixes: the list of inclusive namespace prefixes
1954
* ended with a NULL or NULL if there is no
1955
* inclusive namespaces (only for exclusive
1956
* canonicalization, ignored otherwise)
1957
* @with_comments: include comments in the result (!=0) or not (==0)
1958
* @buf: the output buffer to store canonical XML; this
1959
* buffer MUST have encoder==NULL because C14N requires
1960
* UTF-8 output
1961
*
1962
* Dumps the canonized image of given XML document into the provided buffer.
1963
* For details see "Canonical XML" (http://www.w3.org/TR/xml-c14n) or
1964
* "Exclusive XML Canonicalization" (http://www.w3.org/TR/xml-exc-c14n)
1965
*
1966
* Returns non-negative value on success or a negative value on fail
1967
*/
1968
int
1969
xmlC14NDocSaveTo(xmlDocPtr doc, xmlNodeSetPtr nodes,
1970
int mode, xmlChar ** inclusive_ns_prefixes,
1971
int with_comments, xmlOutputBufferPtr buf) {
1972
return(xmlC14NExecute(doc,
1973
(xmlC14NIsVisibleCallback)xmlC14NIsNodeInNodeset,
1974
nodes,
1975
mode,
1976
inclusive_ns_prefixes,
1977
with_comments,
1978
buf));
1979
}
1980
1981
1982
/**
1983
* xmlC14NDocDumpMemory:
1984
* @doc: the XML document for canonization
1985
* @nodes: the nodes set to be included in the canonized image
1986
* or NULL if all document nodes should be included
1987
* @mode: the c14n mode (see @xmlC14NMode)
1988
* @inclusive_ns_prefixes: the list of inclusive namespace prefixes
1989
* ended with a NULL or NULL if there is no
1990
* inclusive namespaces (only for exclusive
1991
* canonicalization, ignored otherwise)
1992
* @with_comments: include comments in the result (!=0) or not (==0)
1993
* @doc_txt_ptr: the memory pointer for allocated canonical XML text;
1994
* the caller of this functions is responsible for calling
1995
* xmlFree() to free allocated memory
1996
*
1997
* Dumps the canonized image of given XML document into memory.
1998
* For details see "Canonical XML" (http://www.w3.org/TR/xml-c14n) or
1999
* "Exclusive XML Canonicalization" (http://www.w3.org/TR/xml-exc-c14n)
2000
*
2001
* Returns the number of bytes written on success or a negative value on fail
2002
*/
2003
int
2004
xmlC14NDocDumpMemory(xmlDocPtr doc, xmlNodeSetPtr nodes,
2005
int mode, xmlChar ** inclusive_ns_prefixes,
2006
int with_comments, xmlChar ** doc_txt_ptr)
2007
{
2008
int ret;
2009
xmlOutputBufferPtr buf;
2010
2011
if (doc_txt_ptr == NULL) {
2012
xmlC14NErrParam("dumping doc to memory");
2013
return (-1);
2014
}
2015
2016
*doc_txt_ptr = NULL;
2017
2018
/*
2019
* create memory buffer with UTF8 (default) encoding
2020
*/
2021
buf = xmlAllocOutputBuffer(NULL);
2022
if (buf == NULL) {
2023
xmlC14NErrMemory("creating output buffer");
2024
return (-1);
2025
}
2026
2027
/*
2028
* canonize document and write to buffer
2029
*/
2030
ret = xmlC14NDocSaveTo(doc, nodes, mode, inclusive_ns_prefixes,
2031
with_comments, buf);
2032
if (ret < 0) {
2033
xmlC14NErrInternal("saving doc to output buffer");
2034
(void) xmlOutputBufferClose(buf);
2035
return (-1);
2036
}
2037
2038
ret = xmlBufUse(buf->buffer);
2039
if (ret > 0) {
2040
*doc_txt_ptr = xmlStrndup(xmlBufContent(buf->buffer), ret);
2041
}
2042
(void) xmlOutputBufferClose(buf);
2043
2044
if ((*doc_txt_ptr == NULL) && (ret > 0)) {
2045
xmlC14NErrMemory("coping canonicanized document");
2046
return (-1);
2047
}
2048
return (ret);
2049
}
2050
2051
/**
2052
* xmlC14NDocSave:
2053
* @doc: the XML document for canonization
2054
* @nodes: the nodes set to be included in the canonized image
2055
* or NULL if all document nodes should be included
2056
* @mode: the c14n mode (see @xmlC14NMode)
2057
* @inclusive_ns_prefixes: the list of inclusive namespace prefixes
2058
* ended with a NULL or NULL if there is no
2059
* inclusive namespaces (only for exclusive
2060
* canonicalization, ignored otherwise)
2061
* @with_comments: include comments in the result (!=0) or not (==0)
2062
* @filename: the filename to store canonical XML image
2063
* @compression: the compression level (zlib requred):
2064
* -1 - libxml default,
2065
* 0 - uncompressed,
2066
* >0 - compression level
2067
*
2068
* Dumps the canonized image of given XML document into the file.
2069
* For details see "Canonical XML" (http://www.w3.org/TR/xml-c14n) or
2070
* "Exclusive XML Canonicalization" (http://www.w3.org/TR/xml-exc-c14n)
2071
*
2072
* Returns the number of bytes written success or a negative value on fail
2073
*/
2074
int
2075
xmlC14NDocSave(xmlDocPtr doc, xmlNodeSetPtr nodes,
2076
int mode, xmlChar ** inclusive_ns_prefixes,
2077
int with_comments, const char *filename, int compression)
2078
{
2079
xmlOutputBufferPtr buf;
2080
int ret;
2081
2082
if (filename == NULL) {
2083
xmlC14NErrParam("saving doc");
2084
return (-1);
2085
}
2086
#ifdef HAVE_ZLIB_H
2087
if (compression < 0)
2088
compression = xmlGetCompressMode();
2089
#endif
2090
2091
/*
2092
* save the content to a temp buffer, use default UTF8 encoding.
2093
*/
2094
buf = xmlOutputBufferCreateFilename(filename, NULL, compression);
2095
if (buf == NULL) {
2096
xmlC14NErrInternal("creating temporary filename");
2097
return (-1);
2098
}
2099
2100
/*
2101
* canonize document and write to buffer
2102
*/
2103
ret = xmlC14NDocSaveTo(doc, nodes, mode, inclusive_ns_prefixes,
2104
with_comments, buf);
2105
if (ret < 0) {
2106
xmlC14NErrInternal("cannicanize document to buffer");
2107
(void) xmlOutputBufferClose(buf);
2108
return (-1);
2109
}
2110
2111
/*
2112
* get the numbers of bytes written
2113
*/
2114
ret = xmlOutputBufferClose(buf);
2115
return (ret);
2116
}
2117
2118
2119
2120
/*
2121
* Macro used to grow the current buffer.
2122
*/
2123
#define growBufferReentrant() { \
2124
buffer_size *= 2; \
2125
buffer = (xmlChar *) \
2126
xmlRealloc(buffer, buffer_size * sizeof(xmlChar)); \
2127
if (buffer == NULL) { \
2128
xmlC14NErrMemory("growing buffer"); \
2129
return(NULL); \
2130
} \
2131
}
2132
2133
/**
2134
* xmlC11NNormalizeString:
2135
* @input: the input string
2136
* @mode: the normalization mode (attribute, comment, PI or text)
2137
*
2138
* Converts a string to a canonical (normalized) format. The code is stolen
2139
* from xmlEncodeEntitiesReentrant(). Added normalization of \x09, \x0a, \x0A
2140
* and the @mode parameter
2141
*
2142
* Returns a normalized string (caller is responsible for calling xmlFree())
2143
* or NULL if an error occurs
2144
*/
2145
static xmlChar *
2146
xmlC11NNormalizeString(const xmlChar * input,
2147
xmlC14NNormalizationMode mode)
2148
{
2149
const xmlChar *cur = input;
2150
xmlChar *buffer = NULL;
2151
xmlChar *out = NULL;
2152
int buffer_size = 0;
2153
2154
if (input == NULL)
2155
return (NULL);
2156
2157
/*
2158
* allocate an translation buffer.
2159
*/
2160
buffer_size = 1000;
2161
buffer = (xmlChar *) xmlMallocAtomic(buffer_size * sizeof(xmlChar));
2162
if (buffer == NULL) {
2163
xmlC14NErrMemory("allocating buffer");
2164
return (NULL);
2165
}
2166
out = buffer;
2167
2168
while (*cur != '\0') {
2169
if ((out - buffer) > (buffer_size - 10)) {
2170
int indx = out - buffer;
2171
2172
growBufferReentrant();
2173
out = &buffer[indx];
2174
}
2175
2176
if ((*cur == '<') && ((mode == XMLC14N_NORMALIZE_ATTR) ||
2177
(mode == XMLC14N_NORMALIZE_TEXT))) {
2178
*out++ = '&';
2179
*out++ = 'l';
2180
*out++ = 't';
2181
*out++ = ';';
2182
} else if ((*cur == '>') && (mode == XMLC14N_NORMALIZE_TEXT)) {
2183
*out++ = '&';
2184
*out++ = 'g';
2185
*out++ = 't';
2186
*out++ = ';';
2187
} else if ((*cur == '&') && ((mode == XMLC14N_NORMALIZE_ATTR) ||
2188
(mode == XMLC14N_NORMALIZE_TEXT))) {
2189
*out++ = '&';
2190
*out++ = 'a';
2191
*out++ = 'm';
2192
*out++ = 'p';
2193
*out++ = ';';
2194
} else if ((*cur == '"') && (mode == XMLC14N_NORMALIZE_ATTR)) {
2195
*out++ = '&';
2196
*out++ = 'q';
2197
*out++ = 'u';
2198
*out++ = 'o';
2199
*out++ = 't';
2200
*out++ = ';';
2201
} else if ((*cur == '\x09') && (mode == XMLC14N_NORMALIZE_ATTR)) {
2202
*out++ = '&';
2203
*out++ = '#';
2204
*out++ = 'x';
2205
*out++ = '9';
2206
*out++ = ';';
2207
} else if ((*cur == '\x0A') && (mode == XMLC14N_NORMALIZE_ATTR)) {
2208
*out++ = '&';
2209
*out++ = '#';
2210
*out++ = 'x';
2211
*out++ = 'A';
2212
*out++ = ';';
2213
} else if ((*cur == '\x0D') && ((mode == XMLC14N_NORMALIZE_ATTR) ||
2214
(mode == XMLC14N_NORMALIZE_TEXT) ||
2215
(mode == XMLC14N_NORMALIZE_COMMENT) ||
2216
(mode == XMLC14N_NORMALIZE_PI))) {
2217
*out++ = '&';
2218
*out++ = '#';
2219
*out++ = 'x';
2220
*out++ = 'D';
2221
*out++ = ';';
2222
} else {
2223
/*
2224
* Works because on UTF-8, all extended sequences cannot
2225
* result in bytes in the ASCII range.
2226
*/
2227
*out++ = *cur;
2228
}
2229
cur++;
2230
}
2231
*out = 0;
2232
return (buffer);
2233
}
2234
#endif /* LIBXML_OUTPUT_ENABLED */
2235
#define bottom_c14n
2236
#include "elfgcchack.h"
2237
#endif /* LIBXML_C14N_ENABLED */
Loggerhead is a web-based interface for Breezy
Version: 2.0.1