mirror of
https://github.com/reactos/reactos.git
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2235 lines
69 KiB
C
2235 lines
69 KiB
C
/*
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* "Canonical XML" implementation
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* http://www.w3.org/TR/xml-c14n
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*
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* "Exclusive XML Canonicalization" implementation
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* http://www.w3.org/TR/xml-exc-c14n
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*
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* See Copyright for the status of this software.
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*
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* Author: Aleksey Sanin <aleksey@aleksey.com>
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*/
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#define IN_LIBXML
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#include "libxml.h"
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#ifdef LIBXML_C14N_ENABLED
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#ifdef LIBXML_OUTPUT_ENABLED
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#ifdef HAVE_STDLIB_H
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#include <stdlib.h>
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#endif
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#include <string.h>
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#include <libxml/tree.h>
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#include <libxml/parser.h>
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#include <libxml/uri.h>
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#include <libxml/xmlerror.h>
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#include <libxml/globals.h>
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#include <libxml/xpathInternals.h>
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#include <libxml/c14n.h>
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#include "buf.h"
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/************************************************************************
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* *
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* Some declaration better left private ATM *
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* *
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************************************************************************/
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typedef enum {
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XMLC14N_BEFORE_DOCUMENT_ELEMENT = 0,
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XMLC14N_INSIDE_DOCUMENT_ELEMENT = 1,
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XMLC14N_AFTER_DOCUMENT_ELEMENT = 2
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} xmlC14NPosition;
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typedef struct _xmlC14NVisibleNsStack {
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int nsCurEnd; /* number of nodes in the set */
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int nsPrevStart; /* the begginning of the stack for previous visible node */
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int nsPrevEnd; /* the end of the stack for previous visible node */
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int nsMax; /* size of the array as allocated */
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xmlNsPtr *nsTab; /* array of ns in no particular order */
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xmlNodePtr *nodeTab; /* array of nodes in no particular order */
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} xmlC14NVisibleNsStack, *xmlC14NVisibleNsStackPtr;
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typedef struct _xmlC14NCtx {
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/* input parameters */
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xmlDocPtr doc;
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xmlC14NIsVisibleCallback is_visible_callback;
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void* user_data;
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int with_comments;
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xmlOutputBufferPtr buf;
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/* position in the XML document */
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xmlC14NPosition pos;
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int parent_is_doc;
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xmlC14NVisibleNsStackPtr ns_rendered;
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/* C14N mode */
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xmlC14NMode mode;
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/* exclusive canonicalization */
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xmlChar **inclusive_ns_prefixes;
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/* error number */
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int error;
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} xmlC14NCtx, *xmlC14NCtxPtr;
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static xmlC14NVisibleNsStackPtr xmlC14NVisibleNsStackCreate (void);
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static void xmlC14NVisibleNsStackDestroy (xmlC14NVisibleNsStackPtr cur);
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static void xmlC14NVisibleNsStackAdd (xmlC14NVisibleNsStackPtr cur,
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xmlNsPtr ns,
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xmlNodePtr node);
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static void xmlC14NVisibleNsStackSave (xmlC14NVisibleNsStackPtr cur,
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xmlC14NVisibleNsStackPtr state);
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static void xmlC14NVisibleNsStackRestore (xmlC14NVisibleNsStackPtr cur,
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xmlC14NVisibleNsStackPtr state);
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static void xmlC14NVisibleNsStackShift (xmlC14NVisibleNsStackPtr cur);
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static int xmlC14NVisibleNsStackFind (xmlC14NVisibleNsStackPtr cur,
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xmlNsPtr ns);
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static int xmlExcC14NVisibleNsStackFind (xmlC14NVisibleNsStackPtr cur,
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xmlNsPtr ns,
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xmlC14NCtxPtr ctx);
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static int xmlC14NIsNodeInNodeset (void *user_data,
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xmlNodePtr node,
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xmlNodePtr parent);
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static int xmlC14NProcessNode(xmlC14NCtxPtr ctx, xmlNodePtr cur);
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static int xmlC14NProcessNodeList(xmlC14NCtxPtr ctx, xmlNodePtr cur);
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typedef enum {
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XMLC14N_NORMALIZE_ATTR = 0,
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XMLC14N_NORMALIZE_COMMENT = 1,
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XMLC14N_NORMALIZE_PI = 2,
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XMLC14N_NORMALIZE_TEXT = 3
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} xmlC14NNormalizationMode;
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static xmlChar *xmlC11NNormalizeString(const xmlChar * input,
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xmlC14NNormalizationMode mode);
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#define xmlC11NNormalizeAttr( a ) \
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xmlC11NNormalizeString((a), XMLC14N_NORMALIZE_ATTR)
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#define xmlC11NNormalizeComment( a ) \
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xmlC11NNormalizeString((a), XMLC14N_NORMALIZE_COMMENT)
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#define xmlC11NNormalizePI( a ) \
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xmlC11NNormalizeString((a), XMLC14N_NORMALIZE_PI)
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#define xmlC11NNormalizeText( a ) \
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xmlC11NNormalizeString((a), XMLC14N_NORMALIZE_TEXT)
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#define xmlC14NIsVisible( ctx, node, parent ) \
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(((ctx)->is_visible_callback != NULL) ? \
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(ctx)->is_visible_callback((ctx)->user_data, \
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(xmlNodePtr)(node), (xmlNodePtr)(parent)) : 1)
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#define xmlC14NIsExclusive( ctx ) \
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( (ctx)->mode == XML_C14N_EXCLUSIVE_1_0 )
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/************************************************************************
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* *
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* Some factorized error routines *
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* *
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************************************************************************/
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/**
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* xmlC14NErrMemory:
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* @extra: extra informations
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*
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* Handle a redefinition of memory error
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*/
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static void
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xmlC14NErrMemory(const char *extra)
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{
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__xmlRaiseError(NULL, NULL, NULL, NULL, NULL, XML_FROM_C14N,
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XML_ERR_NO_MEMORY, XML_ERR_ERROR, NULL, 0, extra,
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NULL, NULL, 0, 0,
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"Memory allocation failed : %s\n", extra);
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}
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/**
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* xmlC14NErrParam:
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* @extra: extra informations
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*
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* Handle a redefinition of param error
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*/
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static void
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xmlC14NErrParam(const char *extra)
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{
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__xmlRaiseError(NULL, NULL, NULL, NULL, NULL, XML_FROM_C14N,
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XML_ERR_INTERNAL_ERROR, XML_ERR_ERROR, NULL, 0, extra,
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NULL, NULL, 0, 0,
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"Invalid parameter : %s\n", extra);
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}
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/**
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* xmlC14NErrInternal:
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* @extra: extra informations
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*
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* Handle a redefinition of internal error
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*/
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static void
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xmlC14NErrInternal(const char *extra)
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{
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__xmlRaiseError(NULL, NULL, NULL, NULL, NULL, XML_FROM_C14N,
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XML_ERR_INTERNAL_ERROR, XML_ERR_ERROR, NULL, 0, extra,
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NULL, NULL, 0, 0,
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"Internal error : %s\n", extra);
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}
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/**
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* xmlC14NErrInvalidNode:
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* @extra: extra informations
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*
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* Handle a redefinition of invalid node error
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*/
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static void
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xmlC14NErrInvalidNode(const char *node_type, const char *extra)
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{
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__xmlRaiseError(NULL, NULL, NULL, NULL, NULL, XML_FROM_C14N,
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XML_C14N_INVALID_NODE, XML_ERR_ERROR, NULL, 0, extra,
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NULL, NULL, 0, 0,
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"Node %s is invalid here : %s\n", node_type, extra);
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}
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/**
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* xmlC14NErrUnknownNode:
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* @extra: extra informations
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*
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* Handle a redefinition of unknown node error
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*/
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static void
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xmlC14NErrUnknownNode(int node_type, const char *extra)
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{
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__xmlRaiseError(NULL, NULL, NULL, NULL, NULL, XML_FROM_C14N,
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XML_C14N_UNKNOW_NODE, XML_ERR_ERROR, NULL, 0, extra,
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NULL, NULL, 0, 0,
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"Unknown node type %d found : %s\n", node_type, extra);
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}
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/**
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* xmlC14NErrRelativeNamespace:
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* @extra: extra informations
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*
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* Handle a redefinition of relative namespace error
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*/
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static void
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xmlC14NErrRelativeNamespace(const char *ns_uri)
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{
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__xmlRaiseError(NULL, NULL, NULL, NULL, NULL, XML_FROM_C14N,
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XML_C14N_RELATIVE_NAMESPACE, XML_ERR_ERROR, NULL, 0, NULL,
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NULL, NULL, 0, 0,
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"Relative namespace UR is invalid here : %s\n", ns_uri);
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}
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/**
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* xmlC14NErr:
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* @ctxt: a C14N evaluation context
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* @node: the context node
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* @error: the erorr code
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* @msg: the message
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* @extra: extra informations
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*
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* Handle a redefinition of attribute error
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*/
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static void
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xmlC14NErr(xmlC14NCtxPtr ctxt, xmlNodePtr node, int error,
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const char * msg)
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{
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if (ctxt != NULL)
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ctxt->error = error;
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__xmlRaiseError(NULL, NULL, NULL,
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ctxt, node, XML_FROM_C14N, error,
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XML_ERR_ERROR, NULL, 0,
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NULL, NULL, NULL, 0, 0, "%s", msg);
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}
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/************************************************************************
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* *
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* The implementation internals *
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* *
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************************************************************************/
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#define XML_NAMESPACES_DEFAULT 16
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static int
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xmlC14NIsNodeInNodeset(void *user_data, xmlNodePtr node, xmlNodePtr parent) {
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xmlNodeSetPtr nodes = (xmlNodeSetPtr) user_data;
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if((nodes != NULL) && (node != NULL)) {
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if(node->type != XML_NAMESPACE_DECL) {
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return(xmlXPathNodeSetContains(nodes, node));
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} else {
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xmlNs ns;
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memcpy(&ns, node, sizeof(ns));
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/* this is a libxml hack! check xpath.c for details */
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if((parent != NULL) && (parent->type == XML_ATTRIBUTE_NODE)) {
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ns.next = (xmlNsPtr)parent->parent;
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} else {
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ns.next = (xmlNsPtr)parent;
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}
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/*
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* If the input is an XPath node-set, then the node-set must explicitly
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* contain every node to be rendered to the canonical form.
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*/
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return(xmlXPathNodeSetContains(nodes, (xmlNodePtr)&ns));
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}
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}
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return(1);
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}
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static xmlC14NVisibleNsStackPtr
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xmlC14NVisibleNsStackCreate(void) {
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xmlC14NVisibleNsStackPtr ret;
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ret = (xmlC14NVisibleNsStackPtr) xmlMalloc(sizeof(xmlC14NVisibleNsStack));
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if (ret == NULL) {
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xmlC14NErrMemory("creating namespaces stack");
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return(NULL);
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}
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memset(ret, 0 , (size_t) sizeof(xmlC14NVisibleNsStack));
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return(ret);
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}
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static void
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xmlC14NVisibleNsStackDestroy(xmlC14NVisibleNsStackPtr cur) {
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if(cur == NULL) {
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xmlC14NErrParam("destroying namespaces stack");
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return;
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}
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if(cur->nsTab != NULL) {
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memset(cur->nsTab, 0, cur->nsMax * sizeof(xmlNsPtr));
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xmlFree(cur->nsTab);
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}
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if(cur->nodeTab != NULL) {
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memset(cur->nodeTab, 0, cur->nsMax * sizeof(xmlNodePtr));
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xmlFree(cur->nodeTab);
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}
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memset(cur, 0, sizeof(xmlC14NVisibleNsStack));
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xmlFree(cur);
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}
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static void
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xmlC14NVisibleNsStackAdd(xmlC14NVisibleNsStackPtr cur, xmlNsPtr ns, xmlNodePtr node) {
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if((cur == NULL) ||
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((cur->nsTab == NULL) && (cur->nodeTab != NULL)) ||
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((cur->nsTab != NULL) && (cur->nodeTab == NULL))) {
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xmlC14NErrParam("adding namespace to stack");
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return;
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}
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if ((cur->nsTab == NULL) && (cur->nodeTab == NULL)) {
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cur->nsTab = (xmlNsPtr*) xmlMalloc(XML_NAMESPACES_DEFAULT * sizeof(xmlNsPtr));
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cur->nodeTab = (xmlNodePtr*) xmlMalloc(XML_NAMESPACES_DEFAULT * sizeof(xmlNodePtr));
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if ((cur->nsTab == NULL) || (cur->nodeTab == NULL)) {
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xmlC14NErrMemory("adding node to stack");
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return;
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}
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memset(cur->nsTab, 0 , XML_NAMESPACES_DEFAULT * sizeof(xmlNsPtr));
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memset(cur->nodeTab, 0 , XML_NAMESPACES_DEFAULT * sizeof(xmlNodePtr));
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cur->nsMax = XML_NAMESPACES_DEFAULT;
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} else if(cur->nsMax == cur->nsCurEnd) {
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void *tmp;
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int tmpSize;
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tmpSize = 2 * cur->nsMax;
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tmp = xmlRealloc(cur->nsTab, tmpSize * sizeof(xmlNsPtr));
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if (tmp == NULL) {
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xmlC14NErrMemory("adding node to stack");
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return;
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}
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cur->nsTab = (xmlNsPtr*)tmp;
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tmp = xmlRealloc(cur->nodeTab, tmpSize * sizeof(xmlNodePtr));
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if (tmp == NULL) {
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xmlC14NErrMemory("adding node to stack");
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return;
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}
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cur->nodeTab = (xmlNodePtr*)tmp;
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cur->nsMax = tmpSize;
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}
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cur->nsTab[cur->nsCurEnd] = ns;
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cur->nodeTab[cur->nsCurEnd] = node;
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++cur->nsCurEnd;
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}
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static void
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xmlC14NVisibleNsStackSave(xmlC14NVisibleNsStackPtr cur, xmlC14NVisibleNsStackPtr state) {
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if((cur == NULL) || (state == NULL)) {
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xmlC14NErrParam("saving namespaces stack");
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return;
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}
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state->nsCurEnd = cur->nsCurEnd;
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state->nsPrevStart = cur->nsPrevStart;
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state->nsPrevEnd = cur->nsPrevEnd;
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}
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static void
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xmlC14NVisibleNsStackRestore(xmlC14NVisibleNsStackPtr cur, xmlC14NVisibleNsStackPtr state) {
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if((cur == NULL) || (state == NULL)) {
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xmlC14NErrParam("restoring namespaces stack");
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return;
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}
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cur->nsCurEnd = state->nsCurEnd;
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cur->nsPrevStart = state->nsPrevStart;
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cur->nsPrevEnd = state->nsPrevEnd;
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}
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static void
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xmlC14NVisibleNsStackShift(xmlC14NVisibleNsStackPtr cur) {
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if(cur == NULL) {
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xmlC14NErrParam("shifting namespaces stack");
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return;
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}
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cur->nsPrevStart = cur->nsPrevEnd;
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cur->nsPrevEnd = cur->nsCurEnd;
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}
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static int
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xmlC14NStrEqual(const xmlChar *str1, const xmlChar *str2) {
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if (str1 == str2) return(1);
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if (str1 == NULL) return((*str2) == '\0');
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if (str2 == NULL) return((*str1) == '\0');
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do {
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if (*str1++ != *str2) return(0);
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} while (*str2++);
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return(1);
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}
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/**
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* xmlC14NVisibleNsStackFind:
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* @ctx: the C14N context
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* @ns: the namespace to check
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*
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* Checks whether the given namespace was already rendered or not
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*
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* Returns 1 if we already wrote this namespace or 0 otherwise
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*/
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static int
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xmlC14NVisibleNsStackFind(xmlC14NVisibleNsStackPtr cur, xmlNsPtr ns)
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{
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int i;
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const xmlChar *prefix;
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const xmlChar *href;
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int has_empty_ns;
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if(cur == NULL) {
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xmlC14NErrParam("searching namespaces stack (c14n)");
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return (0);
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}
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/*
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* if the default namespace xmlns="" is not defined yet then
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* we do not want to print it out
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*/
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prefix = ((ns == NULL) || (ns->prefix == NULL)) ? BAD_CAST "" : ns->prefix;
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href = ((ns == NULL) || (ns->href == NULL)) ? BAD_CAST "" : ns->href;
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has_empty_ns = (xmlC14NStrEqual(prefix, NULL) && xmlC14NStrEqual(href, NULL));
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if (cur->nsTab != NULL) {
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int start = (has_empty_ns) ? 0 : cur->nsPrevStart;
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for (i = cur->nsCurEnd - 1; i >= start; --i) {
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xmlNsPtr ns1 = cur->nsTab[i];
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if(xmlC14NStrEqual(prefix, (ns1 != NULL) ? ns1->prefix : NULL)) {
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return(xmlC14NStrEqual(href, (ns1 != NULL) ? ns1->href : NULL));
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}
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}
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}
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return(has_empty_ns);
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}
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static int
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xmlExcC14NVisibleNsStackFind(xmlC14NVisibleNsStackPtr cur, xmlNsPtr ns, xmlC14NCtxPtr ctx) {
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int i;
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const xmlChar *prefix;
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const xmlChar *href;
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int has_empty_ns;
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if(cur == NULL) {
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xmlC14NErrParam("searching namespaces stack (exc c14n)");
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return (0);
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}
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/*
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* if the default namespace xmlns="" is not defined yet then
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* we do not want to print it out
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*/
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prefix = ((ns == NULL) || (ns->prefix == NULL)) ? BAD_CAST "" : ns->prefix;
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href = ((ns == NULL) || (ns->href == NULL)) ? BAD_CAST "" : ns->href;
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has_empty_ns = (xmlC14NStrEqual(prefix, NULL) && xmlC14NStrEqual(href, NULL));
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if (cur->nsTab != NULL) {
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int start = 0;
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for (i = cur->nsCurEnd - 1; i >= start; --i) {
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xmlNsPtr ns1 = cur->nsTab[i];
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if(xmlC14NStrEqual(prefix, (ns1 != NULL) ? ns1->prefix : NULL)) {
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if(xmlC14NStrEqual(href, (ns1 != NULL) ? ns1->href : NULL)) {
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return(xmlC14NIsVisible(ctx, ns1, cur->nodeTab[i]));
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} else {
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return(0);
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}
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}
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}
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}
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return(has_empty_ns);
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}
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/**
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* xmlC14NIsXmlNs:
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* @ns: the namespace to check
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*
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* Checks whether the given namespace is a default "xml:" namespace
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* with href="http://www.w3.org/XML/1998/namespace"
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*
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* Returns 1 if the node is default or 0 otherwise
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*/
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/* todo: make it a define? */
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static int
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xmlC14NIsXmlNs(xmlNsPtr ns)
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{
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return ((ns != NULL) &&
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(xmlStrEqual(ns->prefix, BAD_CAST "xml")) &&
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(xmlStrEqual(ns->href, XML_XML_NAMESPACE)));
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}
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/**
|
|
* xmlC14NNsCompare:
|
|
* @ns1: the pointer to first namespace
|
|
* @ns2: the pointer to second namespace
|
|
*
|
|
* Compares the namespaces by names (prefixes).
|
|
*
|
|
* Returns -1 if ns1 < ns2, 0 if ns1 == ns2 or 1 if ns1 > ns2.
|
|
*/
|
|
static int
|
|
xmlC14NNsCompare(const void *data1, const void *data2)
|
|
{
|
|
const xmlNsPtr ns1 = (const xmlNsPtr) data1;
|
|
const xmlNsPtr ns2 = (const xmlNsPtr) data2;
|
|
if (ns1 == ns2)
|
|
return (0);
|
|
if (ns1 == NULL)
|
|
return (-1);
|
|
if (ns2 == NULL)
|
|
return (1);
|
|
|
|
return (xmlStrcmp(ns1->prefix, ns2->prefix));
|
|
}
|
|
|
|
|
|
/**
|
|
* xmlC14NPrintNamespaces:
|
|
* @ns: the pointer to namespace
|
|
* @ctx: the C14N context
|
|
*
|
|
* Prints the given namespace to the output buffer from C14N context.
|
|
*
|
|
* Returns 1 on success or 0 on fail.
|
|
*/
|
|
static int
|
|
xmlC14NPrintNamespaces(const xmlNsPtr ns, xmlC14NCtxPtr ctx)
|
|
{
|
|
|
|
if ((ns == NULL) || (ctx == NULL)) {
|
|
xmlC14NErrParam("writing namespaces");
|
|
return 0;
|
|
}
|
|
|
|
if (ns->prefix != NULL) {
|
|
xmlOutputBufferWriteString(ctx->buf, " xmlns:");
|
|
xmlOutputBufferWriteString(ctx->buf, (const char *) ns->prefix);
|
|
xmlOutputBufferWriteString(ctx->buf, "=");
|
|
} else {
|
|
xmlOutputBufferWriteString(ctx->buf, " xmlns=");
|
|
}
|
|
if(ns->href != NULL) {
|
|
xmlBufWriteQuotedString(ctx->buf->buffer, ns->href);
|
|
} else {
|
|
xmlOutputBufferWriteString(ctx->buf, "\"\"");
|
|
}
|
|
return (1);
|
|
}
|
|
|
|
static int
|
|
xmlC14NPrintNamespacesWalker(const void *ns, void *ctx) {
|
|
return xmlC14NPrintNamespaces((const xmlNsPtr) ns, (xmlC14NCtxPtr) ctx);
|
|
}
|
|
|
|
/**
|
|
* xmlC14NProcessNamespacesAxis:
|
|
* @ctx: the C14N context
|
|
* @node: the current node
|
|
*
|
|
* Prints out canonical namespace axis of the current node to the
|
|
* buffer from C14N context as follows
|
|
*
|
|
* Canonical XML v 1.0 (http://www.w3.org/TR/xml-c14n)
|
|
*
|
|
* Namespace Axis
|
|
* Consider a list L containing only namespace nodes in the
|
|
* axis and in the node-set in lexicographic order (ascending). To begin
|
|
* processing L, if the first node is not the default namespace node (a node
|
|
* with no namespace URI and no local name), then generate a space followed
|
|
* by xmlns="" if and only if the following conditions are met:
|
|
* - the element E that owns the axis is in the node-set
|
|
* - The nearest ancestor element of E in the node-set has a default
|
|
* namespace node in the node-set (default namespace nodes always
|
|
* have non-empty values in XPath)
|
|
* The latter condition eliminates unnecessary occurrences of xmlns="" in
|
|
* the canonical form since an element only receives an xmlns="" if its
|
|
* default namespace is empty and if it has an immediate parent in the
|
|
* canonical form that has a non-empty default namespace. To finish
|
|
* processing L, simply process every namespace node in L, except omit
|
|
* namespace node with local name xml, which defines the xml prefix,
|
|
* if its string value is http://www.w3.org/XML/1998/namespace.
|
|
*
|
|
* Exclusive XML Canonicalization v 1.0 (http://www.w3.org/TR/xml-exc-c14n)
|
|
* Canonical XML applied to a document subset requires the search of the
|
|
* ancestor nodes of each orphan element node for attributes in the xml
|
|
* namespace, such as xml:lang and xml:space. These are copied into the
|
|
* element node except if a declaration of the same attribute is already
|
|
* in the attribute axis of the element (whether or not it is included in
|
|
* the document subset). This search and copying are omitted from the
|
|
* Exclusive XML Canonicalization method.
|
|
*
|
|
* Returns 0 on success or -1 on fail.
|
|
*/
|
|
static int
|
|
xmlC14NProcessNamespacesAxis(xmlC14NCtxPtr ctx, xmlNodePtr cur, int visible)
|
|
{
|
|
xmlNodePtr n;
|
|
xmlNsPtr ns, tmp;
|
|
xmlListPtr list;
|
|
int already_rendered;
|
|
int has_empty_ns = 0;
|
|
|
|
if ((ctx == NULL) || (cur == NULL) || (cur->type != XML_ELEMENT_NODE)) {
|
|
xmlC14NErrParam("processing namespaces axis (c14n)");
|
|
return (-1);
|
|
}
|
|
|
|
/*
|
|
* Create a sorted list to store element namespaces
|
|
*/
|
|
list = xmlListCreate(NULL, xmlC14NNsCompare);
|
|
if (list == NULL) {
|
|
xmlC14NErrInternal("creating namespaces list (c14n)");
|
|
return (-1);
|
|
}
|
|
|
|
/* check all namespaces */
|
|
for(n = cur; n != NULL; n = n->parent) {
|
|
for(ns = n->nsDef; ns != NULL; ns = ns->next) {
|
|
tmp = xmlSearchNs(cur->doc, cur, ns->prefix);
|
|
|
|
if((tmp == ns) && !xmlC14NIsXmlNs(ns) && xmlC14NIsVisible(ctx, ns, cur)) {
|
|
already_rendered = xmlC14NVisibleNsStackFind(ctx->ns_rendered, ns);
|
|
if(visible) {
|
|
xmlC14NVisibleNsStackAdd(ctx->ns_rendered, ns, cur);
|
|
}
|
|
if(!already_rendered) {
|
|
xmlListInsert(list, ns);
|
|
}
|
|
if(xmlStrlen(ns->prefix) == 0) {
|
|
has_empty_ns = 1;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* if the first node is not the default namespace node (a node with no
|
|
* namespace URI and no local name), then generate a space followed by
|
|
* xmlns="" if and only if the following conditions are met:
|
|
* - the element E that owns the axis is in the node-set
|
|
* - the nearest ancestor element of E in the node-set has a default
|
|
* namespace node in the node-set (default namespace nodes always
|
|
* have non-empty values in XPath)
|
|
*/
|
|
if(visible && !has_empty_ns) {
|
|
static xmlNs ns_default;
|
|
|
|
memset(&ns_default, 0, sizeof(ns_default));
|
|
if(!xmlC14NVisibleNsStackFind(ctx->ns_rendered, &ns_default)) {
|
|
xmlC14NPrintNamespaces(&ns_default, ctx);
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* print out all elements from list
|
|
*/
|
|
xmlListWalk(list, xmlC14NPrintNamespacesWalker, (void *) ctx);
|
|
|
|
/*
|
|
* Cleanup
|
|
*/
|
|
xmlListDelete(list);
|
|
return (0);
|
|
}
|
|
|
|
|
|
/**
|
|
* xmlExcC14NProcessNamespacesAxis:
|
|
* @ctx: the C14N context
|
|
* @node: the current node
|
|
*
|
|
* Prints out exclusive canonical namespace axis of the current node to the
|
|
* buffer from C14N context as follows
|
|
*
|
|
* Exclusive XML Canonicalization
|
|
* http://www.w3.org/TR/xml-exc-c14n
|
|
*
|
|
* If the element node is in the XPath subset then output the node in
|
|
* accordance with Canonical XML except for namespace nodes which are
|
|
* rendered as follows:
|
|
*
|
|
* 1. Render each namespace node iff:
|
|
* * it is visibly utilized by the immediate parent element or one of
|
|
* its attributes, or is present in InclusiveNamespaces PrefixList, and
|
|
* * its prefix and value do not appear in ns_rendered. ns_rendered is
|
|
* obtained by popping the state stack in order to obtain a list of
|
|
* prefixes and their values which have already been rendered by
|
|
* an output ancestor of the namespace node's parent element.
|
|
* 2. Append the rendered namespace node to the list ns_rendered of namespace
|
|
* nodes rendered by output ancestors. Push ns_rendered on state stack and
|
|
* recurse.
|
|
* 3. After the recursion returns, pop thestate stack.
|
|
*
|
|
*
|
|
* Returns 0 on success or -1 on fail.
|
|
*/
|
|
static int
|
|
xmlExcC14NProcessNamespacesAxis(xmlC14NCtxPtr ctx, xmlNodePtr cur, int visible)
|
|
{
|
|
xmlNsPtr ns;
|
|
xmlListPtr list;
|
|
xmlAttrPtr attr;
|
|
int already_rendered;
|
|
int has_empty_ns = 0;
|
|
int has_visibly_utilized_empty_ns = 0;
|
|
int has_empty_ns_in_inclusive_list = 0;
|
|
|
|
if ((ctx == NULL) || (cur == NULL) || (cur->type != XML_ELEMENT_NODE)) {
|
|
xmlC14NErrParam("processing namespaces axis (exc c14n)");
|
|
return (-1);
|
|
}
|
|
|
|
if(!xmlC14NIsExclusive(ctx)) {
|
|
xmlC14NErrParam("processing namespaces axis (exc c14n)");
|
|
return (-1);
|
|
|
|
}
|
|
|
|
/*
|
|
* Create a sorted list to store element namespaces
|
|
*/
|
|
list = xmlListCreate(NULL, xmlC14NNsCompare);
|
|
if (list == NULL) {
|
|
xmlC14NErrInternal("creating namespaces list (exc c14n)");
|
|
return (-1);
|
|
}
|
|
|
|
/*
|
|
* process inclusive namespaces:
|
|
* All namespace nodes appearing on inclusive ns list are
|
|
* handled as provided in Canonical XML
|
|
*/
|
|
if(ctx->inclusive_ns_prefixes != NULL) {
|
|
xmlChar *prefix;
|
|
int i;
|
|
|
|
for (i = 0; ctx->inclusive_ns_prefixes[i] != NULL; ++i) {
|
|
prefix = ctx->inclusive_ns_prefixes[i];
|
|
/*
|
|
* Special values for namespace with empty prefix
|
|
*/
|
|
if (xmlStrEqual(prefix, BAD_CAST "#default")
|
|
|| xmlStrEqual(prefix, BAD_CAST "")) {
|
|
prefix = NULL;
|
|
has_empty_ns_in_inclusive_list = 1;
|
|
}
|
|
|
|
ns = xmlSearchNs(cur->doc, cur, prefix);
|
|
if((ns != NULL) && !xmlC14NIsXmlNs(ns) && xmlC14NIsVisible(ctx, ns, cur)) {
|
|
already_rendered = xmlC14NVisibleNsStackFind(ctx->ns_rendered, ns);
|
|
if(visible) {
|
|
xmlC14NVisibleNsStackAdd(ctx->ns_rendered, ns, cur);
|
|
}
|
|
if(!already_rendered) {
|
|
xmlListInsert(list, ns);
|
|
}
|
|
if(xmlStrlen(ns->prefix) == 0) {
|
|
has_empty_ns = 1;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* add node namespace */
|
|
if(cur->ns != NULL) {
|
|
ns = cur->ns;
|
|
} else {
|
|
ns = xmlSearchNs(cur->doc, cur, NULL);
|
|
has_visibly_utilized_empty_ns = 1;
|
|
}
|
|
if((ns != NULL) && !xmlC14NIsXmlNs(ns)) {
|
|
if(visible && xmlC14NIsVisible(ctx, ns, cur)) {
|
|
if(!xmlExcC14NVisibleNsStackFind(ctx->ns_rendered, ns, ctx)) {
|
|
xmlListInsert(list, ns);
|
|
}
|
|
}
|
|
if(visible) {
|
|
xmlC14NVisibleNsStackAdd(ctx->ns_rendered, ns, cur);
|
|
}
|
|
if(xmlStrlen(ns->prefix) == 0) {
|
|
has_empty_ns = 1;
|
|
}
|
|
}
|
|
|
|
|
|
/* add attributes */
|
|
for(attr = cur->properties; attr != NULL; attr = attr->next) {
|
|
/*
|
|
* we need to check that attribute is visible and has non
|
|
* default namespace (XML Namespaces: "default namespaces
|
|
* do not apply directly to attributes")
|
|
*/
|
|
if((attr->ns != NULL) && !xmlC14NIsXmlNs(attr->ns) && xmlC14NIsVisible(ctx, attr, cur)) {
|
|
already_rendered = xmlExcC14NVisibleNsStackFind(ctx->ns_rendered, attr->ns, ctx);
|
|
xmlC14NVisibleNsStackAdd(ctx->ns_rendered, attr->ns, cur);
|
|
if(!already_rendered && visible) {
|
|
xmlListInsert(list, attr->ns);
|
|
}
|
|
if(xmlStrlen(attr->ns->prefix) == 0) {
|
|
has_empty_ns = 1;
|
|
}
|
|
} else if((attr->ns != NULL) && (xmlStrlen(attr->ns->prefix) == 0) && (xmlStrlen(attr->ns->href) == 0)) {
|
|
has_visibly_utilized_empty_ns = 1;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Process xmlns=""
|
|
*/
|
|
if(visible && has_visibly_utilized_empty_ns &&
|
|
!has_empty_ns && !has_empty_ns_in_inclusive_list) {
|
|
static xmlNs ns_default;
|
|
|
|
memset(&ns_default, 0, sizeof(ns_default));
|
|
|
|
already_rendered = xmlExcC14NVisibleNsStackFind(ctx->ns_rendered, &ns_default, ctx);
|
|
if(!already_rendered) {
|
|
xmlC14NPrintNamespaces(&ns_default, ctx);
|
|
}
|
|
} else if(visible && !has_empty_ns && has_empty_ns_in_inclusive_list) {
|
|
static xmlNs ns_default;
|
|
|
|
memset(&ns_default, 0, sizeof(ns_default));
|
|
if(!xmlC14NVisibleNsStackFind(ctx->ns_rendered, &ns_default)) {
|
|
xmlC14NPrintNamespaces(&ns_default, ctx);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
* print out all elements from list
|
|
*/
|
|
xmlListWalk(list, xmlC14NPrintNamespacesWalker, (void *) ctx);
|
|
|
|
/*
|
|
* Cleanup
|
|
*/
|
|
xmlListDelete(list);
|
|
return (0);
|
|
}
|
|
|
|
|
|
/**
|
|
* xmlC14NIsXmlAttr:
|
|
* @attr: the attr to check
|
|
*
|
|
* Checks whether the given attribute is a default "xml:" namespace
|
|
* with href="http://www.w3.org/XML/1998/namespace"
|
|
*
|
|
* Returns 1 if the node is default or 0 otherwise
|
|
*/
|
|
|
|
/* todo: make it a define? */
|
|
static int
|
|
xmlC14NIsXmlAttr(xmlAttrPtr attr)
|
|
{
|
|
return ((attr->ns != NULL) &&
|
|
(xmlC14NIsXmlNs(attr->ns) != 0));
|
|
}
|
|
|
|
|
|
/**
|
|
* xmlC14NAttrsCompare:
|
|
* @attr1: the pointer tls o first attr
|
|
* @attr2: the pointer to second attr
|
|
*
|
|
* Prints the given attribute to the output buffer from C14N context.
|
|
*
|
|
* Returns -1 if attr1 < attr2, 0 if attr1 == attr2 or 1 if attr1 > attr2.
|
|
*/
|
|
static int
|
|
xmlC14NAttrsCompare(const void *data1, const void *data2)
|
|
{
|
|
const xmlAttrPtr attr1 = (const xmlAttrPtr) data1;
|
|
const xmlAttrPtr attr2 = (const xmlAttrPtr) data2;
|
|
int ret = 0;
|
|
|
|
/*
|
|
* Simple cases
|
|
*/
|
|
if (attr1 == attr2)
|
|
return (0);
|
|
if (attr1 == NULL)
|
|
return (-1);
|
|
if (attr2 == NULL)
|
|
return (1);
|
|
if (attr1->ns == attr2->ns) {
|
|
return (xmlStrcmp(attr1->name, attr2->name));
|
|
}
|
|
|
|
/*
|
|
* Attributes in the default namespace are first
|
|
* because the default namespace is not applied to
|
|
* unqualified attributes
|
|
*/
|
|
if (attr1->ns == NULL)
|
|
return (-1);
|
|
if (attr2->ns == NULL)
|
|
return (1);
|
|
if (attr1->ns->prefix == NULL)
|
|
return (-1);
|
|
if (attr2->ns->prefix == NULL)
|
|
return (1);
|
|
|
|
ret = xmlStrcmp(attr1->ns->href, attr2->ns->href);
|
|
if (ret == 0) {
|
|
ret = xmlStrcmp(attr1->name, attr2->name);
|
|
}
|
|
return (ret);
|
|
}
|
|
|
|
|
|
/**
|
|
* xmlC14NPrintAttrs:
|
|
* @attr: the pointer to attr
|
|
* @ctx: the C14N context
|
|
*
|
|
* Prints out canonical attribute urrent node to the
|
|
* buffer from C14N context as follows
|
|
*
|
|
* Canonical XML v 1.0 (http://www.w3.org/TR/xml-c14n)
|
|
*
|
|
* Returns 1 on success or 0 on fail.
|
|
*/
|
|
static int
|
|
xmlC14NPrintAttrs(const void *data, void *user)
|
|
{
|
|
const xmlAttrPtr attr = (const xmlAttrPtr) data;
|
|
xmlC14NCtxPtr ctx = (xmlC14NCtxPtr) user;
|
|
xmlChar *value;
|
|
xmlChar *buffer;
|
|
|
|
if ((attr == NULL) || (ctx == NULL)) {
|
|
xmlC14NErrParam("writing attributes");
|
|
return (0);
|
|
}
|
|
|
|
xmlOutputBufferWriteString(ctx->buf, " ");
|
|
if (attr->ns != NULL && xmlStrlen(attr->ns->prefix) > 0) {
|
|
xmlOutputBufferWriteString(ctx->buf,
|
|
(const char *) attr->ns->prefix);
|
|
xmlOutputBufferWriteString(ctx->buf, ":");
|
|
}
|
|
xmlOutputBufferWriteString(ctx->buf, (const char *) attr->name);
|
|
xmlOutputBufferWriteString(ctx->buf, "=\"");
|
|
|
|
value = xmlNodeListGetString(ctx->doc, attr->children, 1);
|
|
/* todo: should we log an error if value==NULL ? */
|
|
if (value != NULL) {
|
|
buffer = xmlC11NNormalizeAttr(value);
|
|
xmlFree(value);
|
|
if (buffer != NULL) {
|
|
xmlOutputBufferWriteString(ctx->buf, (const char *) buffer);
|
|
xmlFree(buffer);
|
|
} else {
|
|
xmlC14NErrInternal("normalizing attributes axis");
|
|
return (0);
|
|
}
|
|
}
|
|
xmlOutputBufferWriteString(ctx->buf, "\"");
|
|
return (1);
|
|
}
|
|
|
|
/**
|
|
* xmlC14NFindHiddenParentAttr:
|
|
*
|
|
* Finds an attribute in a hidden parent node.
|
|
*
|
|
* Returns a pointer to the attribute node (if found) or NULL otherwise.
|
|
*/
|
|
static xmlAttrPtr
|
|
xmlC14NFindHiddenParentAttr(xmlC14NCtxPtr ctx, xmlNodePtr cur, const xmlChar * name, const xmlChar * ns)
|
|
{
|
|
xmlAttrPtr res;
|
|
while((cur != NULL) && (!xmlC14NIsVisible(ctx, cur, cur->parent))) {
|
|
res = xmlHasNsProp(cur, name, ns);
|
|
if(res != NULL) {
|
|
return res;
|
|
}
|
|
|
|
cur = cur->parent;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* xmlC14NFixupBaseAttr:
|
|
*
|
|
* Fixes up the xml:base attribute
|
|
*
|
|
* Returns the newly created attribute or NULL
|
|
*/
|
|
static xmlAttrPtr
|
|
xmlC14NFixupBaseAttr(xmlC14NCtxPtr ctx, xmlAttrPtr xml_base_attr)
|
|
{
|
|
xmlChar * res = NULL;
|
|
xmlNodePtr cur;
|
|
xmlAttrPtr attr;
|
|
xmlChar * tmp_str;
|
|
xmlChar * tmp_str2;
|
|
int tmp_str_len;
|
|
|
|
if ((ctx == NULL) || (xml_base_attr == NULL) || (xml_base_attr->parent == NULL)) {
|
|
xmlC14NErrParam("processing xml:base attribute");
|
|
return (NULL);
|
|
}
|
|
|
|
/* start from current value */
|
|
res = xmlNodeListGetString(ctx->doc, xml_base_attr->children, 1);
|
|
if(res == NULL) {
|
|
xmlC14NErrInternal("processing xml:base attribute - can't get attr value");
|
|
return (NULL);
|
|
}
|
|
|
|
/* go up the stack until we find a node that we rendered already */
|
|
cur = xml_base_attr->parent->parent;
|
|
while((cur != NULL) && (!xmlC14NIsVisible(ctx, cur, cur->parent))) {
|
|
attr = xmlHasNsProp(cur, BAD_CAST "base", XML_XML_NAMESPACE);
|
|
if(attr != NULL) {
|
|
/* get attr value */
|
|
tmp_str = xmlNodeListGetString(ctx->doc, attr->children, 1);
|
|
if(tmp_str == NULL) {
|
|
xmlFree(res);
|
|
|
|
xmlC14NErrInternal("processing xml:base attribute - can't get attr value");
|
|
return (NULL);
|
|
}
|
|
|
|
/* we need to add '/' if our current base uri ends with '..' or '.'
|
|
to ensure that we are forced to go "up" all the time */
|
|
tmp_str_len = xmlStrlen(tmp_str);
|
|
if(tmp_str_len > 1 && tmp_str[tmp_str_len - 2] == '.') {
|
|
tmp_str2 = xmlStrcat(tmp_str, BAD_CAST "/");
|
|
if(tmp_str2 == NULL) {
|
|
xmlFree(tmp_str);
|
|
xmlFree(res);
|
|
|
|
xmlC14NErrInternal("processing xml:base attribute - can't modify uri");
|
|
return (NULL);
|
|
}
|
|
|
|
tmp_str = tmp_str2;
|
|
}
|
|
|
|
/* build uri */
|
|
tmp_str2 = xmlBuildURI(res, tmp_str);
|
|
if(tmp_str2 == NULL) {
|
|
xmlFree(tmp_str);
|
|
xmlFree(res);
|
|
|
|
xmlC14NErrInternal("processing xml:base attribute - can't construct uri");
|
|
return (NULL);
|
|
}
|
|
|
|
/* cleanup and set the new res */
|
|
xmlFree(tmp_str);
|
|
xmlFree(res);
|
|
res = tmp_str2;
|
|
}
|
|
|
|
/* next */
|
|
cur = cur->parent;
|
|
}
|
|
|
|
/* check if result uri is empty or not */
|
|
if((res == NULL) || xmlStrEqual(res, BAD_CAST "")) {
|
|
xmlFree(res);
|
|
return (NULL);
|
|
}
|
|
|
|
/* create and return the new attribute node */
|
|
attr = xmlNewNsProp(NULL, xml_base_attr->ns, BAD_CAST "base", res);
|
|
if(attr == NULL) {
|
|
xmlFree(res);
|
|
|
|
xmlC14NErrInternal("processing xml:base attribute - can't construct attribute");
|
|
return (NULL);
|
|
}
|
|
|
|
/* done */
|
|
xmlFree(res);
|
|
return (attr);
|
|
}
|
|
|
|
/**
|
|
* xmlC14NProcessAttrsAxis:
|
|
* @ctx: the C14N context
|
|
* @cur: the current node
|
|
* @parent_visible: the visibility of parent node
|
|
* @all_parents_visible: the visibility of all parent nodes
|
|
*
|
|
* Prints out canonical attribute axis of the current node to the
|
|
* buffer from C14N context as follows
|
|
*
|
|
* Canonical XML v 1.0 (http://www.w3.org/TR/xml-c14n)
|
|
*
|
|
* Attribute Axis
|
|
* In lexicographic order (ascending), process each node that
|
|
* is in the element's attribute axis and in the node-set.
|
|
*
|
|
* The processing of an element node E MUST be modified slightly
|
|
* when an XPath node-set is given as input and the element's
|
|
* parent is omitted from the node-set.
|
|
*
|
|
*
|
|
* Exclusive XML Canonicalization v 1.0 (http://www.w3.org/TR/xml-exc-c14n)
|
|
*
|
|
* Canonical XML applied to a document subset requires the search of the
|
|
* ancestor nodes of each orphan element node for attributes in the xml
|
|
* namespace, such as xml:lang and xml:space. These are copied into the
|
|
* element node except if a declaration of the same attribute is already
|
|
* in the attribute axis of the element (whether or not it is included in
|
|
* the document subset). This search and copying are omitted from the
|
|
* Exclusive XML Canonicalization method.
|
|
*
|
|
* Returns 0 on success or -1 on fail.
|
|
*/
|
|
static int
|
|
xmlC14NProcessAttrsAxis(xmlC14NCtxPtr ctx, xmlNodePtr cur, int parent_visible)
|
|
{
|
|
xmlAttrPtr attr;
|
|
xmlListPtr list;
|
|
xmlAttrPtr attrs_to_delete = NULL;
|
|
|
|
/* special processing for 1.1 spec */
|
|
xmlAttrPtr xml_base_attr = NULL;
|
|
xmlAttrPtr xml_lang_attr = NULL;
|
|
xmlAttrPtr xml_space_attr = NULL;
|
|
|
|
if ((ctx == NULL) || (cur == NULL) || (cur->type != XML_ELEMENT_NODE)) {
|
|
xmlC14NErrParam("processing attributes axis");
|
|
return (-1);
|
|
}
|
|
|
|
/*
|
|
* Create a sorted list to store element attributes
|
|
*/
|
|
list = xmlListCreate(NULL, xmlC14NAttrsCompare);
|
|
if (list == NULL) {
|
|
xmlC14NErrInternal("creating attributes list");
|
|
return (-1);
|
|
}
|
|
|
|
switch(ctx->mode) {
|
|
case XML_C14N_1_0:
|
|
/* The processing of an element node E MUST be modified slightly when an XPath node-set is
|
|
* given as input and the element's parent is omitted from the node-set. The method for processing
|
|
* the attribute axis of an element E in the node-set is enhanced. All element nodes along E's
|
|
* ancestor axis are examined for nearest occurrences of attributes in the xml namespace, such
|
|
* as xml:lang and xml:space (whether or not they are in the node-set). From this list of attributes,
|
|
* remove any that are in E's attribute axis (whether or not they are in the node-set). Then,
|
|
* lexicographically merge this attribute list with the nodes of E's attribute axis that are in
|
|
* the node-set. The result of visiting the attribute axis is computed by processing the attribute
|
|
* nodes in this merged attribute list.
|
|
*/
|
|
|
|
/*
|
|
* Add all visible attributes from current node.
|
|
*/
|
|
attr = cur->properties;
|
|
while (attr != NULL) {
|
|
/* check that attribute is visible */
|
|
if (xmlC14NIsVisible(ctx, attr, cur)) {
|
|
xmlListInsert(list, attr);
|
|
}
|
|
attr = attr->next;
|
|
}
|
|
|
|
/*
|
|
* Handle xml attributes
|
|
*/
|
|
if (parent_visible && (cur->parent != NULL) &&
|
|
(!xmlC14NIsVisible(ctx, cur->parent, cur->parent->parent)))
|
|
{
|
|
xmlNodePtr tmp;
|
|
|
|
/*
|
|
* If XPath node-set is not specified then the parent is always
|
|
* visible!
|
|
*/
|
|
tmp = cur->parent;
|
|
while (tmp != NULL) {
|
|
attr = tmp->properties;
|
|
while (attr != NULL) {
|
|
if (xmlC14NIsXmlAttr(attr) != 0) {
|
|
if (xmlListSearch(list, attr) == NULL) {
|
|
xmlListInsert(list, attr);
|
|
}
|
|
}
|
|
attr = attr->next;
|
|
}
|
|
tmp = tmp->parent;
|
|
}
|
|
}
|
|
|
|
/* done */
|
|
break;
|
|
case XML_C14N_EXCLUSIVE_1_0:
|
|
/* attributes in the XML namespace, such as xml:lang and xml:space
|
|
* are not imported into orphan nodes of the document subset
|
|
*/
|
|
|
|
/*
|
|
* Add all visible attributes from current node.
|
|
*/
|
|
attr = cur->properties;
|
|
while (attr != NULL) {
|
|
/* check that attribute is visible */
|
|
if (xmlC14NIsVisible(ctx, attr, cur)) {
|
|
xmlListInsert(list, attr);
|
|
}
|
|
attr = attr->next;
|
|
}
|
|
|
|
/* do nothing special for xml attributes */
|
|
break;
|
|
case XML_C14N_1_1:
|
|
/* The processing of an element node E MUST be modified slightly when an XPath node-set is
|
|
* given as input and some of the element's ancestors are omitted from the node-set.
|
|
*
|
|
* Simple inheritable attributes are attributes that have a value that requires at most a simple
|
|
* redeclaration. This redeclaration is done by supplying a new value in the child axis. The
|
|
* redeclaration of a simple inheritable attribute A contained in one of E's ancestors is done
|
|
* by supplying a value to an attribute Ae inside E with the same name. Simple inheritable attributes
|
|
* are xml:lang and xml:space.
|
|
*
|
|
* The method for processing the attribute axis of an element E in the node-set is hence enhanced.
|
|
* All element nodes along E's ancestor axis are examined for the nearest occurrences of simple
|
|
* inheritable attributes in the xml namespace, such as xml:lang and xml:space (whether or not they
|
|
* are in the node-set). From this list of attributes, any simple inheritable attributes that are
|
|
* already in E's attribute axis (whether or not they are in the node-set) are removed. Then,
|
|
* lexicographically merge this attribute list with the nodes of E's attribute axis that are in
|
|
* the node-set. The result of visiting the attribute axis is computed by processing the attribute
|
|
* nodes in this merged attribute list.
|
|
*
|
|
* The xml:id attribute is not a simple inheritable attribute and no processing of these attributes is
|
|
* performed.
|
|
*
|
|
* The xml:base attribute is not a simple inheritable attribute and requires special processing beyond
|
|
* a simple redeclaration.
|
|
*
|
|
* Attributes in the XML namespace other than xml:base, xml:id, xml:lang, and xml:space MUST be processed
|
|
* as ordinary attributes.
|
|
*/
|
|
|
|
/*
|
|
* Add all visible attributes from current node.
|
|
*/
|
|
attr = cur->properties;
|
|
while (attr != NULL) {
|
|
/* special processing for XML attribute kiks in only when we have invisible parents */
|
|
if ((!parent_visible) || (xmlC14NIsXmlAttr(attr) == 0)) {
|
|
/* check that attribute is visible */
|
|
if (xmlC14NIsVisible(ctx, attr, cur)) {
|
|
xmlListInsert(list, attr);
|
|
}
|
|
} else {
|
|
int matched = 0;
|
|
|
|
/* check for simple inheritance attributes */
|
|
if((!matched) && (xml_lang_attr == NULL) && xmlStrEqual(attr->name, BAD_CAST "lang")) {
|
|
xml_lang_attr = attr;
|
|
matched = 1;
|
|
}
|
|
if((!matched) && (xml_space_attr == NULL) && xmlStrEqual(attr->name, BAD_CAST "space")) {
|
|
xml_space_attr = attr;
|
|
matched = 1;
|
|
}
|
|
|
|
/* check for base attr */
|
|
if((!matched) && (xml_base_attr == NULL) && xmlStrEqual(attr->name, BAD_CAST "base")) {
|
|
xml_base_attr = attr;
|
|
matched = 1;
|
|
}
|
|
|
|
/* otherwise, it is a normal attribute, so just check if it is visible */
|
|
if((!matched) && xmlC14NIsVisible(ctx, attr, cur)) {
|
|
xmlListInsert(list, attr);
|
|
}
|
|
}
|
|
|
|
/* move to the next one */
|
|
attr = attr->next;
|
|
}
|
|
|
|
/* special processing for XML attribute kiks in only when we have invisible parents */
|
|
if ((parent_visible)) {
|
|
|
|
/* simple inheritance attributes - copy */
|
|
if(xml_lang_attr == NULL) {
|
|
xml_lang_attr = xmlC14NFindHiddenParentAttr(ctx, cur->parent, BAD_CAST "lang", XML_XML_NAMESPACE);
|
|
}
|
|
if(xml_lang_attr != NULL) {
|
|
xmlListInsert(list, xml_lang_attr);
|
|
}
|
|
if(xml_space_attr == NULL) {
|
|
xml_space_attr = xmlC14NFindHiddenParentAttr(ctx, cur->parent, BAD_CAST "space", XML_XML_NAMESPACE);
|
|
}
|
|
if(xml_space_attr != NULL) {
|
|
xmlListInsert(list, xml_space_attr);
|
|
}
|
|
|
|
/* base uri attribute - fix up */
|
|
if(xml_base_attr == NULL) {
|
|
/* if we don't have base uri attribute, check if we have a "hidden" one above */
|
|
xml_base_attr = xmlC14NFindHiddenParentAttr(ctx, cur->parent, BAD_CAST "base", XML_XML_NAMESPACE);
|
|
}
|
|
if(xml_base_attr != NULL) {
|
|
xml_base_attr = xmlC14NFixupBaseAttr(ctx, xml_base_attr);
|
|
if(xml_base_attr != NULL) {
|
|
xmlListInsert(list, xml_base_attr);
|
|
|
|
/* note that we MUST delete returned attr node ourselves! */
|
|
xml_base_attr->next = attrs_to_delete;
|
|
attrs_to_delete = xml_base_attr;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* done */
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* print out all elements from list
|
|
*/
|
|
xmlListWalk(list, xmlC14NPrintAttrs, (void *) ctx);
|
|
|
|
/*
|
|
* Cleanup
|
|
*/
|
|
xmlFreePropList(attrs_to_delete);
|
|
xmlListDelete(list);
|
|
return (0);
|
|
}
|
|
|
|
/**
|
|
* xmlC14NCheckForRelativeNamespaces:
|
|
* @ctx: the C14N context
|
|
* @cur: the current element node
|
|
*
|
|
* Checks that current element node has no relative namespaces defined
|
|
*
|
|
* Returns 0 if the node has no relative namespaces or -1 otherwise.
|
|
*/
|
|
static int
|
|
xmlC14NCheckForRelativeNamespaces(xmlC14NCtxPtr ctx, xmlNodePtr cur)
|
|
{
|
|
xmlNsPtr ns;
|
|
|
|
if ((ctx == NULL) || (cur == NULL) || (cur->type != XML_ELEMENT_NODE)) {
|
|
xmlC14NErrParam("checking for relative namespaces");
|
|
return (-1);
|
|
}
|
|
|
|
ns = cur->nsDef;
|
|
while (ns != NULL) {
|
|
if (xmlStrlen(ns->href) > 0) {
|
|
xmlURIPtr uri;
|
|
|
|
uri = xmlParseURI((const char *) ns->href);
|
|
if (uri == NULL) {
|
|
xmlC14NErrInternal("parsing namespace uri");
|
|
return (-1);
|
|
}
|
|
if (xmlStrlen((const xmlChar *) uri->scheme) == 0) {
|
|
xmlC14NErrRelativeNamespace(uri->scheme);
|
|
xmlFreeURI(uri);
|
|
return (-1);
|
|
}
|
|
xmlFreeURI(uri);
|
|
}
|
|
ns = ns->next;
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/**
|
|
* xmlC14NProcessElementNode:
|
|
* @ctx: the pointer to C14N context object
|
|
* @cur: the node to process
|
|
* @visible: this node is visible
|
|
* @all_parents_visible: whether all the parents of this node are visible
|
|
*
|
|
* Canonical XML v 1.0 (http://www.w3.org/TR/xml-c14n)
|
|
*
|
|
* Element Nodes
|
|
* If the element is not in the node-set, then the result is obtained
|
|
* by processing the namespace axis, then the attribute axis, then
|
|
* processing the child nodes of the element that are in the node-set
|
|
* (in document order). If the element is in the node-set, then the result
|
|
* is an open angle bracket (<), the element QName, the result of
|
|
* processing the namespace axis, the result of processing the attribute
|
|
* axis, a close angle bracket (>), the result of processing the child
|
|
* nodes of the element that are in the node-set (in document order), an
|
|
* open angle bracket, a forward slash (/), the element QName, and a close
|
|
* angle bracket.
|
|
*
|
|
* Returns non-negative value on success or negative value on fail
|
|
*/
|
|
static int
|
|
xmlC14NProcessElementNode(xmlC14NCtxPtr ctx, xmlNodePtr cur, int visible)
|
|
{
|
|
int ret;
|
|
xmlC14NVisibleNsStack state;
|
|
int parent_is_doc = 0;
|
|
|
|
if ((ctx == NULL) || (cur == NULL) || (cur->type != XML_ELEMENT_NODE)) {
|
|
xmlC14NErrParam("processing element node");
|
|
return (-1);
|
|
}
|
|
|
|
/*
|
|
* Check relative relative namespaces:
|
|
* implementations of XML canonicalization MUST report an operation
|
|
* failure on documents containing relative namespace URIs.
|
|
*/
|
|
if (xmlC14NCheckForRelativeNamespaces(ctx, cur) < 0) {
|
|
xmlC14NErrInternal("checking for relative namespaces");
|
|
return (-1);
|
|
}
|
|
|
|
|
|
/*
|
|
* Save ns_rendered stack position
|
|
*/
|
|
memset(&state, 0, sizeof(state));
|
|
xmlC14NVisibleNsStackSave(ctx->ns_rendered, &state);
|
|
|
|
if (visible) {
|
|
if (ctx->parent_is_doc) {
|
|
/* save this flag into the stack */
|
|
parent_is_doc = ctx->parent_is_doc;
|
|
ctx->parent_is_doc = 0;
|
|
ctx->pos = XMLC14N_INSIDE_DOCUMENT_ELEMENT;
|
|
}
|
|
xmlOutputBufferWriteString(ctx->buf, "<");
|
|
|
|
if ((cur->ns != NULL) && (xmlStrlen(cur->ns->prefix) > 0)) {
|
|
xmlOutputBufferWriteString(ctx->buf,
|
|
(const char *) cur->ns->prefix);
|
|
xmlOutputBufferWriteString(ctx->buf, ":");
|
|
}
|
|
xmlOutputBufferWriteString(ctx->buf, (const char *) cur->name);
|
|
}
|
|
|
|
if (!xmlC14NIsExclusive(ctx)) {
|
|
ret = xmlC14NProcessNamespacesAxis(ctx, cur, visible);
|
|
} else {
|
|
ret = xmlExcC14NProcessNamespacesAxis(ctx, cur, visible);
|
|
}
|
|
if (ret < 0) {
|
|
xmlC14NErrInternal("processing namespaces axis");
|
|
return (-1);
|
|
}
|
|
/* todo: shouldn't this go to "visible only"? */
|
|
if(visible) {
|
|
xmlC14NVisibleNsStackShift(ctx->ns_rendered);
|
|
}
|
|
|
|
ret = xmlC14NProcessAttrsAxis(ctx, cur, visible);
|
|
if (ret < 0) {
|
|
xmlC14NErrInternal("processing attributes axis");
|
|
return (-1);
|
|
}
|
|
|
|
if (visible) {
|
|
xmlOutputBufferWriteString(ctx->buf, ">");
|
|
}
|
|
if (cur->children != NULL) {
|
|
ret = xmlC14NProcessNodeList(ctx, cur->children);
|
|
if (ret < 0) {
|
|
xmlC14NErrInternal("processing childrens list");
|
|
return (-1);
|
|
}
|
|
}
|
|
if (visible) {
|
|
xmlOutputBufferWriteString(ctx->buf, "</");
|
|
if ((cur->ns != NULL) && (xmlStrlen(cur->ns->prefix) > 0)) {
|
|
xmlOutputBufferWriteString(ctx->buf,
|
|
(const char *) cur->ns->prefix);
|
|
xmlOutputBufferWriteString(ctx->buf, ":");
|
|
}
|
|
xmlOutputBufferWriteString(ctx->buf, (const char *) cur->name);
|
|
xmlOutputBufferWriteString(ctx->buf, ">");
|
|
if (parent_is_doc) {
|
|
/* restore this flag from the stack for next node */
|
|
ctx->parent_is_doc = parent_is_doc;
|
|
ctx->pos = XMLC14N_AFTER_DOCUMENT_ELEMENT;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Restore ns_rendered stack position
|
|
*/
|
|
xmlC14NVisibleNsStackRestore(ctx->ns_rendered, &state);
|
|
return (0);
|
|
}
|
|
|
|
/**
|
|
* xmlC14NProcessNode:
|
|
* @ctx: the pointer to C14N context object
|
|
* @cur: the node to process
|
|
*
|
|
* Processes the given node
|
|
*
|
|
* Returns non-negative value on success or negative value on fail
|
|
*/
|
|
static int
|
|
xmlC14NProcessNode(xmlC14NCtxPtr ctx, xmlNodePtr cur)
|
|
{
|
|
int ret = 0;
|
|
int visible;
|
|
|
|
if ((ctx == NULL) || (cur == NULL)) {
|
|
xmlC14NErrParam("processing node");
|
|
return (-1);
|
|
}
|
|
|
|
visible = xmlC14NIsVisible(ctx, cur, cur->parent);
|
|
switch (cur->type) {
|
|
case XML_ELEMENT_NODE:
|
|
ret = xmlC14NProcessElementNode(ctx, cur, visible);
|
|
break;
|
|
case XML_CDATA_SECTION_NODE:
|
|
case XML_TEXT_NODE:
|
|
/*
|
|
* Text Nodes
|
|
* the string value, except all ampersands are replaced
|
|
* by &, all open angle brackets (<) are replaced by <, all closing
|
|
* angle brackets (>) are replaced by >, and all #xD characters are
|
|
* replaced by 
.
|
|
*/
|
|
/* cdata sections are processed as text nodes */
|
|
/* todo: verify that cdata sections are included in XPath nodes set */
|
|
if ((visible) && (cur->content != NULL)) {
|
|
xmlChar *buffer;
|
|
|
|
buffer = xmlC11NNormalizeText(cur->content);
|
|
if (buffer != NULL) {
|
|
xmlOutputBufferWriteString(ctx->buf,
|
|
(const char *) buffer);
|
|
xmlFree(buffer);
|
|
} else {
|
|
xmlC14NErrInternal("normalizing text node");
|
|
return (-1);
|
|
}
|
|
}
|
|
break;
|
|
case XML_PI_NODE:
|
|
/*
|
|
* Processing Instruction (PI) Nodes-
|
|
* The opening PI symbol (<?), the PI target name of the node,
|
|
* a leading space and the string value if it is not empty, and
|
|
* the closing PI symbol (?>). If the string value is empty,
|
|
* then the leading space is not added. Also, a trailing #xA is
|
|
* rendered after the closing PI symbol for PI children of the
|
|
* root node with a lesser document order than the document
|
|
* element, and a leading #xA is rendered before the opening PI
|
|
* symbol of PI children of the root node with a greater document
|
|
* order than the document element.
|
|
*/
|
|
if (visible) {
|
|
if (ctx->pos == XMLC14N_AFTER_DOCUMENT_ELEMENT) {
|
|
xmlOutputBufferWriteString(ctx->buf, "\x0A<?");
|
|
} else {
|
|
xmlOutputBufferWriteString(ctx->buf, "<?");
|
|
}
|
|
|
|
xmlOutputBufferWriteString(ctx->buf,
|
|
(const char *) cur->name);
|
|
if ((cur->content != NULL) && (*(cur->content) != '\0')) {
|
|
xmlChar *buffer;
|
|
|
|
xmlOutputBufferWriteString(ctx->buf, " ");
|
|
|
|
/* todo: do we need to normalize pi? */
|
|
buffer = xmlC11NNormalizePI(cur->content);
|
|
if (buffer != NULL) {
|
|
xmlOutputBufferWriteString(ctx->buf,
|
|
(const char *) buffer);
|
|
xmlFree(buffer);
|
|
} else {
|
|
xmlC14NErrInternal("normalizing pi node");
|
|
return (-1);
|
|
}
|
|
}
|
|
|
|
if (ctx->pos == XMLC14N_BEFORE_DOCUMENT_ELEMENT) {
|
|
xmlOutputBufferWriteString(ctx->buf, "?>\x0A");
|
|
} else {
|
|
xmlOutputBufferWriteString(ctx->buf, "?>");
|
|
}
|
|
}
|
|
break;
|
|
case XML_COMMENT_NODE:
|
|
/*
|
|
* Comment Nodes
|
|
* Nothing if generating canonical XML without comments. For
|
|
* canonical XML with comments, generate the opening comment
|
|
* symbol (<!--), the string value of the node, and the
|
|
* closing comment symbol (-->). Also, a trailing #xA is rendered
|
|
* after the closing comment symbol for comment children of the
|
|
* root node with a lesser document order than the document
|
|
* element, and a leading #xA is rendered before the opening
|
|
* comment symbol of comment children of the root node with a
|
|
* greater document order than the document element. (Comment
|
|
* children of the root node represent comments outside of the
|
|
* top-level document element and outside of the document type
|
|
* declaration).
|
|
*/
|
|
if (visible && ctx->with_comments) {
|
|
if (ctx->pos == XMLC14N_AFTER_DOCUMENT_ELEMENT) {
|
|
xmlOutputBufferWriteString(ctx->buf, "\x0A<!--");
|
|
} else {
|
|
xmlOutputBufferWriteString(ctx->buf, "<!--");
|
|
}
|
|
|
|
if (cur->content != NULL) {
|
|
xmlChar *buffer;
|
|
|
|
/* todo: do we need to normalize comment? */
|
|
buffer = xmlC11NNormalizeComment(cur->content);
|
|
if (buffer != NULL) {
|
|
xmlOutputBufferWriteString(ctx->buf,
|
|
(const char *) buffer);
|
|
xmlFree(buffer);
|
|
} else {
|
|
xmlC14NErrInternal("normalizing comment node");
|
|
return (-1);
|
|
}
|
|
}
|
|
|
|
if (ctx->pos == XMLC14N_BEFORE_DOCUMENT_ELEMENT) {
|
|
xmlOutputBufferWriteString(ctx->buf, "-->\x0A");
|
|
} else {
|
|
xmlOutputBufferWriteString(ctx->buf, "-->");
|
|
}
|
|
}
|
|
break;
|
|
case XML_DOCUMENT_NODE:
|
|
case XML_DOCUMENT_FRAG_NODE: /* should be processed as document? */
|
|
#ifdef LIBXML_DOCB_ENABLED
|
|
case XML_DOCB_DOCUMENT_NODE: /* should be processed as document? */
|
|
#endif
|
|
#ifdef LIBXML_HTML_ENABLED
|
|
case XML_HTML_DOCUMENT_NODE: /* should be processed as document? */
|
|
#endif
|
|
if (cur->children != NULL) {
|
|
ctx->pos = XMLC14N_BEFORE_DOCUMENT_ELEMENT;
|
|
ctx->parent_is_doc = 1;
|
|
ret = xmlC14NProcessNodeList(ctx, cur->children);
|
|
}
|
|
break;
|
|
|
|
case XML_ATTRIBUTE_NODE:
|
|
xmlC14NErrInvalidNode("XML_ATTRIBUTE_NODE", "processing node");
|
|
return (-1);
|
|
case XML_NAMESPACE_DECL:
|
|
xmlC14NErrInvalidNode("XML_NAMESPACE_DECL", "processing node");
|
|
return (-1);
|
|
case XML_ENTITY_REF_NODE:
|
|
xmlC14NErrInvalidNode("XML_ENTITY_REF_NODE", "processing node");
|
|
return (-1);
|
|
case XML_ENTITY_NODE:
|
|
xmlC14NErrInvalidNode("XML_ENTITY_NODE", "processing node");
|
|
return (-1);
|
|
|
|
case XML_DOCUMENT_TYPE_NODE:
|
|
case XML_NOTATION_NODE:
|
|
case XML_DTD_NODE:
|
|
case XML_ELEMENT_DECL:
|
|
case XML_ATTRIBUTE_DECL:
|
|
case XML_ENTITY_DECL:
|
|
#ifdef LIBXML_XINCLUDE_ENABLED
|
|
case XML_XINCLUDE_START:
|
|
case XML_XINCLUDE_END:
|
|
#endif
|
|
/*
|
|
* should be ignored according to "W3C Canonical XML"
|
|
*/
|
|
break;
|
|
default:
|
|
xmlC14NErrUnknownNode(cur->type, "processing node");
|
|
return (-1);
|
|
}
|
|
|
|
return (ret);
|
|
}
|
|
|
|
/**
|
|
* xmlC14NProcessNodeList:
|
|
* @ctx: the pointer to C14N context object
|
|
* @cur: the node to start from
|
|
*
|
|
* Processes all nodes in the row starting from cur.
|
|
*
|
|
* Returns non-negative value on success or negative value on fail
|
|
*/
|
|
static int
|
|
xmlC14NProcessNodeList(xmlC14NCtxPtr ctx, xmlNodePtr cur)
|
|
{
|
|
int ret;
|
|
|
|
if (ctx == NULL) {
|
|
xmlC14NErrParam("processing node list");
|
|
return (-1);
|
|
}
|
|
|
|
for (ret = 0; cur != NULL && ret >= 0; cur = cur->next) {
|
|
ret = xmlC14NProcessNode(ctx, cur);
|
|
}
|
|
return (ret);
|
|
}
|
|
|
|
|
|
/**
|
|
* xmlC14NFreeCtx:
|
|
* @ctx: the pointer to C14N context object
|
|
*
|
|
* Cleanups the C14N context object.
|
|
*/
|
|
|
|
static void
|
|
xmlC14NFreeCtx(xmlC14NCtxPtr ctx)
|
|
{
|
|
if (ctx == NULL) {
|
|
xmlC14NErrParam("freeing context");
|
|
return;
|
|
}
|
|
|
|
if (ctx->ns_rendered != NULL) {
|
|
xmlC14NVisibleNsStackDestroy(ctx->ns_rendered);
|
|
}
|
|
xmlFree(ctx);
|
|
}
|
|
|
|
/**
|
|
* xmlC14NNewCtx:
|
|
* @doc: the XML document for canonization
|
|
* @is_visible_callback:the function to use to determine is node visible
|
|
* or not
|
|
* @user_data: the first parameter for @is_visible_callback function
|
|
* (in most cases, it is nodes set)
|
|
* @mode: the c14n mode (see @xmlC14NMode)
|
|
* @inclusive_ns_prefixe the list of inclusive namespace prefixes
|
|
* ended with a NULL or NULL if there is no
|
|
* inclusive namespaces (only for `
|
|
* canonicalization)
|
|
* @with_comments: include comments in the result (!=0) or not (==0)
|
|
* @buf: the output buffer to store canonical XML; this
|
|
* buffer MUST have encoder==NULL because C14N requires
|
|
* UTF-8 output
|
|
*
|
|
* Creates new C14N context object to store C14N parameters.
|
|
*
|
|
* Returns pointer to newly created object (success) or NULL (fail)
|
|
*/
|
|
static xmlC14NCtxPtr
|
|
xmlC14NNewCtx(xmlDocPtr doc,
|
|
xmlC14NIsVisibleCallback is_visible_callback, void* user_data,
|
|
xmlC14NMode mode, xmlChar ** inclusive_ns_prefixes,
|
|
int with_comments, xmlOutputBufferPtr buf)
|
|
{
|
|
xmlC14NCtxPtr ctx = NULL;
|
|
|
|
if ((doc == NULL) || (buf == NULL)) {
|
|
xmlC14NErrParam("creating new context");
|
|
return (NULL);
|
|
}
|
|
|
|
/*
|
|
* Validate the encoding output buffer encoding
|
|
*/
|
|
if (buf->encoder != NULL) {
|
|
xmlC14NErr(ctx, (xmlNodePtr) doc, XML_C14N_REQUIRES_UTF8,
|
|
"xmlC14NNewCtx: output buffer encoder != NULL but C14N requires UTF8 output\n");
|
|
return (NULL);
|
|
}
|
|
|
|
/*
|
|
* Allocate a new xmlC14NCtxPtr and fill the fields.
|
|
*/
|
|
ctx = (xmlC14NCtxPtr) xmlMalloc(sizeof(xmlC14NCtx));
|
|
if (ctx == NULL) {
|
|
xmlC14NErrMemory("creating context");
|
|
return (NULL);
|
|
}
|
|
memset(ctx, 0, sizeof(xmlC14NCtx));
|
|
|
|
/*
|
|
* initialize C14N context
|
|
*/
|
|
ctx->doc = doc;
|
|
ctx->with_comments = with_comments;
|
|
ctx->is_visible_callback = is_visible_callback;
|
|
ctx->user_data = user_data;
|
|
ctx->buf = buf;
|
|
ctx->parent_is_doc = 1;
|
|
ctx->pos = XMLC14N_BEFORE_DOCUMENT_ELEMENT;
|
|
ctx->ns_rendered = xmlC14NVisibleNsStackCreate();
|
|
|
|
if(ctx->ns_rendered == NULL) {
|
|
xmlC14NErr(ctx, (xmlNodePtr) doc, XML_C14N_CREATE_STACK,
|
|
"xmlC14NNewCtx: xmlC14NVisibleNsStackCreate failed\n");
|
|
xmlC14NFreeCtx(ctx);
|
|
return (NULL);
|
|
}
|
|
|
|
/*
|
|
* Set "mode" flag and remember list of incluseve prefixes
|
|
* for exclusive c14n
|
|
*/
|
|
ctx->mode = mode;
|
|
if(xmlC14NIsExclusive(ctx)) {
|
|
ctx->inclusive_ns_prefixes = inclusive_ns_prefixes;
|
|
}
|
|
return (ctx);
|
|
}
|
|
|
|
/**
|
|
* xmlC14NExecute:
|
|
* @doc: the XML document for canonization
|
|
* @is_visible_callback:the function to use to determine is node visible
|
|
* or not
|
|
* @user_data: the first parameter for @is_visible_callback function
|
|
* (in most cases, it is nodes set)
|
|
* @mode: the c14n mode (see @xmlC14NMode)
|
|
* @inclusive_ns_prefixes: the list of inclusive namespace prefixes
|
|
* ended with a NULL or NULL if there is no
|
|
* inclusive namespaces (only for exclusive
|
|
* canonicalization, ignored otherwise)
|
|
* @with_comments: include comments in the result (!=0) or not (==0)
|
|
* @buf: the output buffer to store canonical XML; this
|
|
* buffer MUST have encoder==NULL because C14N requires
|
|
* UTF-8 output
|
|
*
|
|
* Dumps the canonized image of given XML document into the provided buffer.
|
|
* For details see "Canonical XML" (http://www.w3.org/TR/xml-c14n) or
|
|
* "Exclusive XML Canonicalization" (http://www.w3.org/TR/xml-exc-c14n)
|
|
*
|
|
* Returns non-negative value on success or a negative value on fail
|
|
*/
|
|
int
|
|
xmlC14NExecute(xmlDocPtr doc, xmlC14NIsVisibleCallback is_visible_callback,
|
|
void* user_data, int mode, xmlChar **inclusive_ns_prefixes,
|
|
int with_comments, xmlOutputBufferPtr buf) {
|
|
|
|
xmlC14NCtxPtr ctx;
|
|
xmlC14NMode c14n_mode = XML_C14N_1_0;
|
|
int ret;
|
|
|
|
if ((buf == NULL) || (doc == NULL)) {
|
|
xmlC14NErrParam("executing c14n");
|
|
return (-1);
|
|
}
|
|
|
|
/* for backward compatibility, we have to have "mode" as "int"
|
|
and here we check that user gives valid value */
|
|
switch(mode) {
|
|
case XML_C14N_1_0:
|
|
case XML_C14N_EXCLUSIVE_1_0:
|
|
case XML_C14N_1_1:
|
|
c14n_mode = (xmlC14NMode)mode;
|
|
break;
|
|
default:
|
|
xmlC14NErrParam("invalid mode for executing c14n");
|
|
return (-1);
|
|
}
|
|
|
|
/*
|
|
* Validate the encoding output buffer encoding
|
|
*/
|
|
if (buf->encoder != NULL) {
|
|
xmlC14NErr(NULL, (xmlNodePtr) doc, XML_C14N_REQUIRES_UTF8,
|
|
"xmlC14NExecute: output buffer encoder != NULL but C14N requires UTF8 output\n");
|
|
return (-1);
|
|
}
|
|
|
|
ctx = xmlC14NNewCtx(doc, is_visible_callback, user_data,
|
|
c14n_mode, inclusive_ns_prefixes,
|
|
with_comments, buf);
|
|
if (ctx == NULL) {
|
|
xmlC14NErr(NULL, (xmlNodePtr) doc, XML_C14N_CREATE_CTXT,
|
|
"xmlC14NExecute: unable to create C14N context\n");
|
|
return (-1);
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
* Root Node
|
|
* The root node is the parent of the top-level document element. The
|
|
* result of processing each of its child nodes that is in the node-set
|
|
* in document order. The root node does not generate a byte order mark,
|
|
* XML declaration, nor anything from within the document type
|
|
* declaration.
|
|
*/
|
|
if (doc->children != NULL) {
|
|
ret = xmlC14NProcessNodeList(ctx, doc->children);
|
|
if (ret < 0) {
|
|
xmlC14NErrInternal("processing docs children list");
|
|
xmlC14NFreeCtx(ctx);
|
|
return (-1);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Flush buffer to get number of bytes written
|
|
*/
|
|
ret = xmlOutputBufferFlush(buf);
|
|
if (ret < 0) {
|
|
xmlC14NErrInternal("flushing output buffer");
|
|
xmlC14NFreeCtx(ctx);
|
|
return (-1);
|
|
}
|
|
|
|
/*
|
|
* Cleanup
|
|
*/
|
|
xmlC14NFreeCtx(ctx);
|
|
return (ret);
|
|
}
|
|
|
|
/**
|
|
* xmlC14NDocSaveTo:
|
|
* @doc: the XML document for canonization
|
|
* @nodes: the nodes set to be included in the canonized image
|
|
* or NULL if all document nodes should be included
|
|
* @mode: the c14n mode (see @xmlC14NMode)
|
|
* @inclusive_ns_prefixes: the list of inclusive namespace prefixes
|
|
* ended with a NULL or NULL if there is no
|
|
* inclusive namespaces (only for exclusive
|
|
* canonicalization, ignored otherwise)
|
|
* @with_comments: include comments in the result (!=0) or not (==0)
|
|
* @buf: the output buffer to store canonical XML; this
|
|
* buffer MUST have encoder==NULL because C14N requires
|
|
* UTF-8 output
|
|
*
|
|
* Dumps the canonized image of given XML document into the provided buffer.
|
|
* For details see "Canonical XML" (http://www.w3.org/TR/xml-c14n) or
|
|
* "Exclusive XML Canonicalization" (http://www.w3.org/TR/xml-exc-c14n)
|
|
*
|
|
* Returns non-negative value on success or a negative value on fail
|
|
*/
|
|
int
|
|
xmlC14NDocSaveTo(xmlDocPtr doc, xmlNodeSetPtr nodes,
|
|
int mode, xmlChar ** inclusive_ns_prefixes,
|
|
int with_comments, xmlOutputBufferPtr buf) {
|
|
return(xmlC14NExecute(doc,
|
|
xmlC14NIsNodeInNodeset,
|
|
nodes,
|
|
mode,
|
|
inclusive_ns_prefixes,
|
|
with_comments,
|
|
buf));
|
|
}
|
|
|
|
|
|
/**
|
|
* xmlC14NDocDumpMemory:
|
|
* @doc: the XML document for canonization
|
|
* @nodes: the nodes set to be included in the canonized image
|
|
* or NULL if all document nodes should be included
|
|
* @mode: the c14n mode (see @xmlC14NMode)
|
|
* @inclusive_ns_prefixes: the list of inclusive namespace prefixes
|
|
* ended with a NULL or NULL if there is no
|
|
* inclusive namespaces (only for exclusive
|
|
* canonicalization, ignored otherwise)
|
|
* @with_comments: include comments in the result (!=0) or not (==0)
|
|
* @doc_txt_ptr: the memory pointer for allocated canonical XML text;
|
|
* the caller of this functions is responsible for calling
|
|
* xmlFree() to free allocated memory
|
|
*
|
|
* Dumps the canonized image of given XML document into memory.
|
|
* For details see "Canonical XML" (http://www.w3.org/TR/xml-c14n) or
|
|
* "Exclusive XML Canonicalization" (http://www.w3.org/TR/xml-exc-c14n)
|
|
*
|
|
* Returns the number of bytes written on success or a negative value on fail
|
|
*/
|
|
int
|
|
xmlC14NDocDumpMemory(xmlDocPtr doc, xmlNodeSetPtr nodes,
|
|
int mode, xmlChar ** inclusive_ns_prefixes,
|
|
int with_comments, xmlChar ** doc_txt_ptr)
|
|
{
|
|
int ret;
|
|
xmlOutputBufferPtr buf;
|
|
|
|
if (doc_txt_ptr == NULL) {
|
|
xmlC14NErrParam("dumping doc to memory");
|
|
return (-1);
|
|
}
|
|
|
|
*doc_txt_ptr = NULL;
|
|
|
|
/*
|
|
* create memory buffer with UTF8 (default) encoding
|
|
*/
|
|
buf = xmlAllocOutputBuffer(NULL);
|
|
if (buf == NULL) {
|
|
xmlC14NErrMemory("creating output buffer");
|
|
return (-1);
|
|
}
|
|
|
|
/*
|
|
* canonize document and write to buffer
|
|
*/
|
|
ret = xmlC14NDocSaveTo(doc, nodes, mode, inclusive_ns_prefixes,
|
|
with_comments, buf);
|
|
if (ret < 0) {
|
|
xmlC14NErrInternal("saving doc to output buffer");
|
|
(void) xmlOutputBufferClose(buf);
|
|
return (-1);
|
|
}
|
|
|
|
ret = xmlBufUse(buf->buffer);
|
|
if (ret > 0) {
|
|
*doc_txt_ptr = xmlStrndup(xmlBufContent(buf->buffer), ret);
|
|
}
|
|
(void) xmlOutputBufferClose(buf);
|
|
|
|
if ((*doc_txt_ptr == NULL) && (ret > 0)) {
|
|
xmlC14NErrMemory("coping canonicanized document");
|
|
return (-1);
|
|
}
|
|
return (ret);
|
|
}
|
|
|
|
/**
|
|
* xmlC14NDocSave:
|
|
* @doc: the XML document for canonization
|
|
* @nodes: the nodes set to be included in the canonized image
|
|
* or NULL if all document nodes should be included
|
|
* @mode: the c14n mode (see @xmlC14NMode)
|
|
* @inclusive_ns_prefixes: the list of inclusive namespace prefixes
|
|
* ended with a NULL or NULL if there is no
|
|
* inclusive namespaces (only for exclusive
|
|
* canonicalization, ignored otherwise)
|
|
* @with_comments: include comments in the result (!=0) or not (==0)
|
|
* @filename: the filename to store canonical XML image
|
|
* @compression: the compression level (zlib requred):
|
|
* -1 - libxml default,
|
|
* 0 - uncompressed,
|
|
* >0 - compression level
|
|
*
|
|
* Dumps the canonized image of given XML document into the file.
|
|
* For details see "Canonical XML" (http://www.w3.org/TR/xml-c14n) or
|
|
* "Exclusive XML Canonicalization" (http://www.w3.org/TR/xml-exc-c14n)
|
|
*
|
|
* Returns the number of bytes written success or a negative value on fail
|
|
*/
|
|
int
|
|
xmlC14NDocSave(xmlDocPtr doc, xmlNodeSetPtr nodes,
|
|
int mode, xmlChar ** inclusive_ns_prefixes,
|
|
int with_comments, const char *filename, int compression)
|
|
{
|
|
xmlOutputBufferPtr buf;
|
|
int ret;
|
|
|
|
if (filename == NULL) {
|
|
xmlC14NErrParam("saving doc");
|
|
return (-1);
|
|
}
|
|
#ifdef LIBXML_ZLIB_ENABLED
|
|
if (compression < 0)
|
|
compression = xmlGetCompressMode();
|
|
#endif
|
|
|
|
/*
|
|
* save the content to a temp buffer, use default UTF8 encoding.
|
|
*/
|
|
buf = xmlOutputBufferCreateFilename(filename, NULL, compression);
|
|
if (buf == NULL) {
|
|
xmlC14NErrInternal("creating temporary filename");
|
|
return (-1);
|
|
}
|
|
|
|
/*
|
|
* canonize document and write to buffer
|
|
*/
|
|
ret = xmlC14NDocSaveTo(doc, nodes, mode, inclusive_ns_prefixes,
|
|
with_comments, buf);
|
|
if (ret < 0) {
|
|
xmlC14NErrInternal("cannicanize document to buffer");
|
|
(void) xmlOutputBufferClose(buf);
|
|
return (-1);
|
|
}
|
|
|
|
/*
|
|
* get the numbers of bytes written
|
|
*/
|
|
ret = xmlOutputBufferClose(buf);
|
|
return (ret);
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
* Macro used to grow the current buffer.
|
|
*/
|
|
#define growBufferReentrant() { \
|
|
buffer_size *= 2; \
|
|
buffer = (xmlChar *) \
|
|
xmlRealloc(buffer, buffer_size * sizeof(xmlChar)); \
|
|
if (buffer == NULL) { \
|
|
xmlC14NErrMemory("growing buffer"); \
|
|
return(NULL); \
|
|
} \
|
|
}
|
|
|
|
/**
|
|
* xmlC11NNormalizeString:
|
|
* @input: the input string
|
|
* @mode: the normalization mode (attribute, comment, PI or text)
|
|
*
|
|
* Converts a string to a canonical (normalized) format. The code is stolen
|
|
* from xmlEncodeEntitiesReentrant(). Added normalization of \x09, \x0a, \x0A
|
|
* and the @mode parameter
|
|
*
|
|
* Returns a normalized string (caller is responsible for calling xmlFree())
|
|
* or NULL if an error occurs
|
|
*/
|
|
static xmlChar *
|
|
xmlC11NNormalizeString(const xmlChar * input,
|
|
xmlC14NNormalizationMode mode)
|
|
{
|
|
const xmlChar *cur = input;
|
|
xmlChar *buffer = NULL;
|
|
xmlChar *out = NULL;
|
|
int buffer_size = 0;
|
|
|
|
if (input == NULL)
|
|
return (NULL);
|
|
|
|
/*
|
|
* allocate an translation buffer.
|
|
*/
|
|
buffer_size = 1000;
|
|
buffer = (xmlChar *) xmlMallocAtomic(buffer_size * sizeof(xmlChar));
|
|
if (buffer == NULL) {
|
|
xmlC14NErrMemory("allocating buffer");
|
|
return (NULL);
|
|
}
|
|
out = buffer;
|
|
|
|
while (*cur != '\0') {
|
|
if ((out - buffer) > (buffer_size - 10)) {
|
|
int indx = out - buffer;
|
|
|
|
growBufferReentrant();
|
|
out = &buffer[indx];
|
|
}
|
|
|
|
if ((*cur == '<') && ((mode == XMLC14N_NORMALIZE_ATTR) ||
|
|
(mode == XMLC14N_NORMALIZE_TEXT))) {
|
|
*out++ = '&';
|
|
*out++ = 'l';
|
|
*out++ = 't';
|
|
*out++ = ';';
|
|
} else if ((*cur == '>') && (mode == XMLC14N_NORMALIZE_TEXT)) {
|
|
*out++ = '&';
|
|
*out++ = 'g';
|
|
*out++ = 't';
|
|
*out++ = ';';
|
|
} else if ((*cur == '&') && ((mode == XMLC14N_NORMALIZE_ATTR) ||
|
|
(mode == XMLC14N_NORMALIZE_TEXT))) {
|
|
*out++ = '&';
|
|
*out++ = 'a';
|
|
*out++ = 'm';
|
|
*out++ = 'p';
|
|
*out++ = ';';
|
|
} else if ((*cur == '"') && (mode == XMLC14N_NORMALIZE_ATTR)) {
|
|
*out++ = '&';
|
|
*out++ = 'q';
|
|
*out++ = 'u';
|
|
*out++ = 'o';
|
|
*out++ = 't';
|
|
*out++ = ';';
|
|
} else if ((*cur == '\x09') && (mode == XMLC14N_NORMALIZE_ATTR)) {
|
|
*out++ = '&';
|
|
*out++ = '#';
|
|
*out++ = 'x';
|
|
*out++ = '9';
|
|
*out++ = ';';
|
|
} else if ((*cur == '\x0A') && (mode == XMLC14N_NORMALIZE_ATTR)) {
|
|
*out++ = '&';
|
|
*out++ = '#';
|
|
*out++ = 'x';
|
|
*out++ = 'A';
|
|
*out++ = ';';
|
|
} else if ((*cur == '\x0D') && ((mode == XMLC14N_NORMALIZE_ATTR) ||
|
|
(mode == XMLC14N_NORMALIZE_TEXT) ||
|
|
(mode == XMLC14N_NORMALIZE_COMMENT) ||
|
|
(mode == XMLC14N_NORMALIZE_PI))) {
|
|
*out++ = '&';
|
|
*out++ = '#';
|
|
*out++ = 'x';
|
|
*out++ = 'D';
|
|
*out++ = ';';
|
|
} else {
|
|
/*
|
|
* Works because on UTF-8, all extended sequences cannot
|
|
* result in bytes in the ASCII range.
|
|
*/
|
|
*out++ = *cur;
|
|
}
|
|
cur++;
|
|
}
|
|
*out = 0;
|
|
return (buffer);
|
|
}
|
|
#endif /* LIBXML_OUTPUT_ENABLED */
|
|
#define bottom_c14n
|
|
#include "elfgcchack.h"
|
|
#endif /* LIBXML_C14N_ENABLED */
|