| /* |
| * "Canonical XML" implementation |
| * http://www.w3.org/TR/xml-c14n |
| * |
| * "Exclusive XML Canonicalization" implementation |
| * http://www.w3.org/TR/xml-exc-c14n |
| * |
| * See Copyright for the status of this software. |
| * |
| * Author: Aleksey Sanin <aleksey@aleksey.com> |
| */ |
| #define IN_LIBXML |
| #include "libxml.h" |
| #ifdef LIBXML_C14N_ENABLED |
| #ifdef LIBXML_OUTPUT_ENABLED |
| |
| #ifdef HAVE_STDLIB_H |
| #include <stdlib.h> |
| #endif |
| #ifdef HAVE_STRING_H |
| #include <string.h> |
| #endif |
| |
| #include <libxml/tree.h> |
| #include <libxml/parser.h> |
| #include <libxml/uri.h> |
| #include <libxml/xmlerror.h> |
| #include <libxml/globals.h> |
| #include <libxml/xpathInternals.h> |
| #include <libxml/c14n.h> |
| |
| #include "buf.h" |
| |
| /************************************************************************ |
| * * |
| * Some declaration better left private ATM * |
| * * |
| ************************************************************************/ |
| |
| typedef enum { |
| XMLC14N_BEFORE_DOCUMENT_ELEMENT = 0, |
| XMLC14N_INSIDE_DOCUMENT_ELEMENT = 1, |
| XMLC14N_AFTER_DOCUMENT_ELEMENT = 2 |
| } xmlC14NPosition; |
| |
| typedef struct _xmlC14NVisibleNsStack { |
| int nsCurEnd; /* number of nodes in the set */ |
| int nsPrevStart; /* the begginning of the stack for previous visible node */ |
| int nsPrevEnd; /* the end of the stack for previous visible node */ |
| int nsMax; /* size of the array as allocated */ |
| xmlNsPtr *nsTab; /* array of ns in no particular order */ |
| xmlNodePtr *nodeTab; /* array of nodes in no particular order */ |
| } xmlC14NVisibleNsStack, *xmlC14NVisibleNsStackPtr; |
| |
| typedef struct _xmlC14NCtx { |
| /* input parameters */ |
| xmlDocPtr doc; |
| xmlC14NIsVisibleCallback is_visible_callback; |
| void* user_data; |
| int with_comments; |
| xmlOutputBufferPtr buf; |
| |
| /* position in the XML document */ |
| xmlC14NPosition pos; |
| int parent_is_doc; |
| xmlC14NVisibleNsStackPtr ns_rendered; |
| |
| /* C14N mode */ |
| xmlC14NMode mode; |
| |
| /* exclusive canonicalization */ |
| xmlChar **inclusive_ns_prefixes; |
| |
| /* error number */ |
| int error; |
| } xmlC14NCtx, *xmlC14NCtxPtr; |
| |
| static xmlC14NVisibleNsStackPtr xmlC14NVisibleNsStackCreate (void); |
| static void xmlC14NVisibleNsStackDestroy (xmlC14NVisibleNsStackPtr cur); |
| static void xmlC14NVisibleNsStackAdd (xmlC14NVisibleNsStackPtr cur, |
| xmlNsPtr ns, |
| xmlNodePtr node); |
| static void xmlC14NVisibleNsStackSave (xmlC14NVisibleNsStackPtr cur, |
| xmlC14NVisibleNsStackPtr state); |
| static void xmlC14NVisibleNsStackRestore (xmlC14NVisibleNsStackPtr cur, |
| xmlC14NVisibleNsStackPtr state); |
| static void xmlC14NVisibleNsStackShift (xmlC14NVisibleNsStackPtr cur); |
| static int xmlC14NVisibleNsStackFind (xmlC14NVisibleNsStackPtr cur, |
| xmlNsPtr ns); |
| static int xmlExcC14NVisibleNsStackFind (xmlC14NVisibleNsStackPtr cur, |
| xmlNsPtr ns, |
| xmlC14NCtxPtr ctx); |
| |
| static int xmlC14NIsNodeInNodeset (xmlNodeSetPtr nodes, |
| xmlNodePtr node, |
| xmlNodePtr parent); |
| |
| |
| |
| static int xmlC14NProcessNode(xmlC14NCtxPtr ctx, xmlNodePtr cur); |
| static int xmlC14NProcessNodeList(xmlC14NCtxPtr ctx, xmlNodePtr cur); |
| typedef enum { |
| XMLC14N_NORMALIZE_ATTR = 0, |
| XMLC14N_NORMALIZE_COMMENT = 1, |
| XMLC14N_NORMALIZE_PI = 2, |
| XMLC14N_NORMALIZE_TEXT = 3 |
| } xmlC14NNormalizationMode; |
| |
| static xmlChar *xmlC11NNormalizeString(const xmlChar * input, |
| xmlC14NNormalizationMode mode); |
| |
| #define xmlC11NNormalizeAttr( a ) \ |
| xmlC11NNormalizeString((a), XMLC14N_NORMALIZE_ATTR) |
| #define xmlC11NNormalizeComment( a ) \ |
| xmlC11NNormalizeString((a), XMLC14N_NORMALIZE_COMMENT) |
| #define xmlC11NNormalizePI( a ) \ |
| xmlC11NNormalizeString((a), XMLC14N_NORMALIZE_PI) |
| #define xmlC11NNormalizeText( a ) \ |
| xmlC11NNormalizeString((a), XMLC14N_NORMALIZE_TEXT) |
| |
| #define xmlC14NIsVisible( ctx, node, parent ) \ |
| (((ctx)->is_visible_callback != NULL) ? \ |
| (ctx)->is_visible_callback((ctx)->user_data, \ |
| (xmlNodePtr)(node), (xmlNodePtr)(parent)) : 1) |
| |
| #define xmlC14NIsExclusive( ctx ) \ |
| ( (ctx)->mode == XML_C14N_EXCLUSIVE_1_0 ) |
| |
| /************************************************************************ |
| * * |
| * Some factorized error routines * |
| * * |
| ************************************************************************/ |
| |
| /** |
| * xmlC14NErrMemory: |
| * @extra: extra informations |
| * |
| * Handle a redefinition of memory error |
| */ |
| static void |
| xmlC14NErrMemory(const char *extra) |
| { |
| __xmlRaiseError(NULL, NULL, NULL, NULL, NULL, XML_FROM_C14N, |
| XML_ERR_NO_MEMORY, XML_ERR_ERROR, NULL, 0, extra, |
| NULL, NULL, 0, 0, |
| "Memory allocation failed : %s\n", extra); |
| } |
| |
| /** |
| * xmlC14NErrParam: |
| * @extra: extra informations |
| * |
| * Handle a redefinition of param error |
| */ |
| static void |
| xmlC14NErrParam(const char *extra) |
| { |
| __xmlRaiseError(NULL, NULL, NULL, NULL, NULL, XML_FROM_C14N, |
| XML_ERR_INTERNAL_ERROR, XML_ERR_ERROR, NULL, 0, extra, |
| NULL, NULL, 0, 0, |
| "Invalid parameter : %s\n", extra); |
| } |
| |
| /** |
| * xmlC14NErrInternal: |
| * @extra: extra informations |
| * |
| * Handle a redefinition of internal error |
| */ |
| static void |
| xmlC14NErrInternal(const char *extra) |
| { |
| __xmlRaiseError(NULL, NULL, NULL, NULL, NULL, XML_FROM_C14N, |
| XML_ERR_INTERNAL_ERROR, XML_ERR_ERROR, NULL, 0, extra, |
| NULL, NULL, 0, 0, |
| "Internal error : %s\n", extra); |
| } |
| |
| /** |
| * xmlC14NErrInvalidNode: |
| * @extra: extra informations |
| * |
| * Handle a redefinition of invalid node error |
| */ |
| static void |
| xmlC14NErrInvalidNode(const char *node_type, const char *extra) |
| { |
| __xmlRaiseError(NULL, NULL, NULL, NULL, NULL, XML_FROM_C14N, |
| XML_C14N_INVALID_NODE, XML_ERR_ERROR, NULL, 0, extra, |
| NULL, NULL, 0, 0, |
| "Node %s is invalid here : %s\n", node_type, extra); |
| } |
| |
| /** |
| * xmlC14NErrUnknownNode: |
| * @extra: extra informations |
| * |
| * Handle a redefinition of unknown node error |
| */ |
| static void |
| xmlC14NErrUnknownNode(int node_type, const char *extra) |
| { |
| __xmlRaiseError(NULL, NULL, NULL, NULL, NULL, XML_FROM_C14N, |
| XML_C14N_UNKNOW_NODE, XML_ERR_ERROR, NULL, 0, extra, |
| NULL, NULL, 0, 0, |
| "Unknown node type %d found : %s\n", node_type, extra); |
| } |
| |
| /** |
| * xmlC14NErrRelativeNamespace: |
| * @extra: extra informations |
| * |
| * Handle a redefinition of relative namespace error |
| */ |
| static void |
| xmlC14NErrRelativeNamespace(const char *ns_uri) |
| { |
| __xmlRaiseError(NULL, NULL, NULL, NULL, NULL, XML_FROM_C14N, |
| XML_C14N_RELATIVE_NAMESPACE, XML_ERR_ERROR, NULL, 0, NULL, |
| NULL, NULL, 0, 0, |
| "Relative namespace UR is invalid here : %s\n", ns_uri); |
| } |
| |
| |
| |
| /** |
| * xmlC14NErr: |
| * @ctxt: a C14N evaluation context |
| * @node: the context node |
| * @error: the erorr code |
| * @msg: the message |
| * @extra: extra informations |
| * |
| * Handle a redefinition of attribute error |
| */ |
| static void |
| xmlC14NErr(xmlC14NCtxPtr ctxt, xmlNodePtr node, int error, |
| const char * msg) |
| { |
| if (ctxt != NULL) |
| ctxt->error = error; |
| __xmlRaiseError(NULL, NULL, NULL, |
| ctxt, node, XML_FROM_C14N, error, |
| XML_ERR_ERROR, NULL, 0, |
| NULL, NULL, NULL, 0, 0, "%s", msg); |
| } |
| |
| /************************************************************************ |
| * * |
| * The implementation internals * |
| * * |
| ************************************************************************/ |
| #define XML_NAMESPACES_DEFAULT 16 |
| |
| static int |
| xmlC14NIsNodeInNodeset(xmlNodeSetPtr nodes, xmlNodePtr node, xmlNodePtr parent) { |
| if((nodes != NULL) && (node != NULL)) { |
| if(node->type != XML_NAMESPACE_DECL) { |
| return(xmlXPathNodeSetContains(nodes, node)); |
| } else { |
| xmlNs ns; |
| |
| XML_MEMCPY(&ns, node, sizeof(ns)); |
| |
| /* this is a libxml hack! check xpath.c for details */ |
| if((parent != NULL) && (parent->type == XML_ATTRIBUTE_NODE)) { |
| ns.next = (xmlNsPtr)parent->parent; |
| } else { |
| ns.next = (xmlNsPtr)parent; |
| } |
| |
| /* |
| * If the input is an XPath node-set, then the node-set must explicitly |
| * contain every node to be rendered to the canonical form. |
| */ |
| return(xmlXPathNodeSetContains(nodes, (xmlNodePtr)&ns)); |
| } |
| } |
| return(1); |
| } |
| |
| static xmlC14NVisibleNsStackPtr |
| xmlC14NVisibleNsStackCreate(void) { |
| xmlC14NVisibleNsStackPtr ret; |
| |
| ret = (xmlC14NVisibleNsStackPtr) xmlMalloc(sizeof(xmlC14NVisibleNsStack)); |
| if (ret == NULL) { |
| xmlC14NErrMemory("creating namespaces stack"); |
| return(NULL); |
| } |
| XML_MEMSET(ret, 0 , (size_t) sizeof(xmlC14NVisibleNsStack)); |
| return(ret); |
| } |
| |
| static void |
| xmlC14NVisibleNsStackDestroy(xmlC14NVisibleNsStackPtr cur) { |
| if(cur == NULL) { |
| xmlC14NErrParam("destroying namespaces stack"); |
| return; |
| } |
| if(cur->nsTab != NULL) { |
| XML_MEMSET(cur->nsTab, 0, cur->nsMax * sizeof(xmlNsPtr)); |
| xmlFree(cur->nsTab); |
| } |
| if(cur->nodeTab != NULL) { |
| XML_MEMSET(cur->nodeTab, 0, cur->nsMax * sizeof(xmlNodePtr)); |
| xmlFree(cur->nodeTab); |
| } |
| XML_MEMSET(cur, 0, sizeof(xmlC14NVisibleNsStack)); |
| xmlFree(cur); |
| |
| } |
| |
| static void |
| xmlC14NVisibleNsStackAdd(xmlC14NVisibleNsStackPtr cur, xmlNsPtr ns, xmlNodePtr node) { |
| if((cur == NULL) || |
| ((cur->nsTab == NULL) && (cur->nodeTab != NULL)) || |
| ((cur->nsTab != NULL) && (cur->nodeTab == NULL))) { |
| xmlC14NErrParam("adding namespace to stack"); |
| return; |
| } |
| |
| if ((cur->nsTab == NULL) && (cur->nodeTab == NULL)) { |
| cur->nsTab = (xmlNsPtr*) xmlMalloc(XML_NAMESPACES_DEFAULT * sizeof(xmlNsPtr)); |
| cur->nodeTab = (xmlNodePtr*) xmlMalloc(XML_NAMESPACES_DEFAULT * sizeof(xmlNodePtr)); |
| if ((cur->nsTab == NULL) || (cur->nodeTab == NULL)) { |
| xmlC14NErrMemory("adding node to stack"); |
| return; |
| } |
| XML_MEMSET(cur->nsTab, 0 , XML_NAMESPACES_DEFAULT * sizeof(xmlNsPtr)); |
| XML_MEMSET(cur->nodeTab, 0 , XML_NAMESPACES_DEFAULT * sizeof(xmlNodePtr)); |
| cur->nsMax = XML_NAMESPACES_DEFAULT; |
| } else if(cur->nsMax == cur->nsCurEnd) { |
| void *tmp; |
| int tmpSize; |
| |
| tmpSize = 2 * cur->nsMax; |
| tmp = xmlRealloc(cur->nsTab, tmpSize * sizeof(xmlNsPtr)); |
| if (tmp == NULL) { |
| xmlC14NErrMemory("adding node to stack"); |
| return; |
| } |
| cur->nsTab = (xmlNsPtr*)tmp; |
| |
| tmp = xmlRealloc(cur->nodeTab, tmpSize * sizeof(xmlNodePtr)); |
| if (tmp == NULL) { |
| xmlC14NErrMemory("adding node to stack"); |
| return; |
| } |
| cur->nodeTab = (xmlNodePtr*)tmp; |
| |
| cur->nsMax = tmpSize; |
| } |
| cur->nsTab[cur->nsCurEnd] = ns; |
| cur->nodeTab[cur->nsCurEnd] = node; |
| |
| ++cur->nsCurEnd; |
| } |
| |
| static void |
| xmlC14NVisibleNsStackSave(xmlC14NVisibleNsStackPtr cur, xmlC14NVisibleNsStackPtr state) { |
| if((cur == NULL) || (state == NULL)) { |
| xmlC14NErrParam("saving namespaces stack"); |
| return; |
| } |
| |
| state->nsCurEnd = cur->nsCurEnd; |
| state->nsPrevStart = cur->nsPrevStart; |
| state->nsPrevEnd = cur->nsPrevEnd; |
| } |
| |
| static void |
| xmlC14NVisibleNsStackRestore(xmlC14NVisibleNsStackPtr cur, xmlC14NVisibleNsStackPtr state) { |
| if((cur == NULL) || (state == NULL)) { |
| xmlC14NErrParam("restoring namespaces stack"); |
| return; |
| } |
| cur->nsCurEnd = state->nsCurEnd; |
| cur->nsPrevStart = state->nsPrevStart; |
| cur->nsPrevEnd = state->nsPrevEnd; |
| } |
| |
| static void |
| xmlC14NVisibleNsStackShift(xmlC14NVisibleNsStackPtr cur) { |
| if(cur == NULL) { |
| xmlC14NErrParam("shifting namespaces stack"); |
| return; |
| } |
| cur->nsPrevStart = cur->nsPrevEnd; |
| cur->nsPrevEnd = cur->nsCurEnd; |
| } |
| |
| static int |
| xmlC14NStrEqual(const xmlChar *str1, const xmlChar *str2) { |
| if (str1 == str2) return(1); |
| if (str1 == NULL) return((*str2) == '\0'); |
| if (str2 == NULL) return((*str1) == '\0'); |
| do { |
| if (*str1++ != *str2) return(0); |
| } while (*str2++); |
| return(1); |
| } |
| |
| /** |
| * xmlC14NVisibleNsStackFind: |
| * @ctx: the C14N context |
| * @ns: the namespace to check |
| * |
| * Checks whether the given namespace was already rendered or not |
| * |
| * Returns 1 if we already wrote this namespace or 0 otherwise |
| */ |
| static int |
| xmlC14NVisibleNsStackFind(xmlC14NVisibleNsStackPtr cur, xmlNsPtr ns) |
| { |
| int i; |
| const xmlChar *prefix; |
| const xmlChar *href; |
| int has_empty_ns; |
| |
| if(cur == NULL) { |
| xmlC14NErrParam("searching namespaces stack (c14n)"); |
| return (0); |
| } |
| |
| /* |
| * if the default namespace xmlns="" is not defined yet then |
| * we do not want to print it out |
| */ |
| prefix = ((ns == NULL) || (ns->prefix == NULL)) ? BAD_CAST "" : ns->prefix; |
| href = ((ns == NULL) || (ns->href == NULL)) ? BAD_CAST "" : ns->href; |
| has_empty_ns = (xmlC14NStrEqual(prefix, NULL) && xmlC14NStrEqual(href, NULL)); |
| |
| if (cur->nsTab != NULL) { |
| int start = (has_empty_ns) ? 0 : cur->nsPrevStart; |
| for (i = cur->nsCurEnd - 1; i >= start; --i) { |
| xmlNsPtr ns1 = cur->nsTab[i]; |
| |
| if(xmlC14NStrEqual(prefix, (ns1 != NULL) ? ns1->prefix : NULL)) { |
| return(xmlC14NStrEqual(href, (ns1 != NULL) ? ns1->href : NULL)); |
| } |
| } |
| } |
| return(has_empty_ns); |
| } |
| |
| static int |
| xmlExcC14NVisibleNsStackFind(xmlC14NVisibleNsStackPtr cur, xmlNsPtr ns, xmlC14NCtxPtr ctx) { |
| int i; |
| const xmlChar *prefix; |
| const xmlChar *href; |
| int has_empty_ns; |
| |
| if(cur == NULL) { |
| xmlC14NErrParam("searching namespaces stack (exc c14n)"); |
| return (0); |
| } |
| |
| /* |
| * if the default namespace xmlns="" is not defined yet then |
| * we do not want to print it out |
| */ |
| prefix = ((ns == NULL) || (ns->prefix == NULL)) ? BAD_CAST "" : ns->prefix; |
| href = ((ns == NULL) || (ns->href == NULL)) ? BAD_CAST "" : ns->href; |
| has_empty_ns = (xmlC14NStrEqual(prefix, NULL) && xmlC14NStrEqual(href, NULL)); |
| |
| if (cur->nsTab != NULL) { |
| int start = 0; |
| for (i = cur->nsCurEnd - 1; i >= start; --i) { |
| xmlNsPtr ns1 = cur->nsTab[i]; |
| |
| if(xmlC14NStrEqual(prefix, (ns1 != NULL) ? ns1->prefix : NULL)) { |
| if(xmlC14NStrEqual(href, (ns1 != NULL) ? ns1->href : NULL)) { |
| return(xmlC14NIsVisible(ctx, ns1, cur->nodeTab[i])); |
| } else { |
| return(0); |
| } |
| } |
| } |
| } |
| return(has_empty_ns); |
| } |
| |
| |
| |
| |
| /** |
| * xmlC14NIsXmlNs: |
| * @ns: the namespace to check |
| * |
| * Checks whether the given namespace 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 |
| xmlC14NIsXmlNs(xmlNsPtr ns) |
| { |
| return ((ns != NULL) && |
| (xmlStrEqual(ns->prefix, BAD_CAST "xml")) && |
| (xmlStrEqual(ns->href, XML_XML_NAMESPACE))); |
| } |
| |
| |
| /** |
| * 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(xmlNsPtr ns1, xmlNsPtr ns2) |
| { |
| 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); |
| } |
| |
| /** |
| * 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, (xmlListDataCompare) 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; |
| |
| XML_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, (xmlListWalker) xmlC14NPrintNamespaces, (const 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, (xmlListDataCompare) 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; |
| |
| XML_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; |
| |
| XML_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, (xmlListWalker) xmlC14NPrintNamespaces, (const 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(xmlAttrPtr attr1, xmlAttrPtr attr2) |
| { |
| 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 xmlAttrPtr attr, xmlC14NCtxPtr ctx) |
| { |
| 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, (xmlListDataCompare) 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, (xmlListWalker) xmlC14NPrintAttrs, (const 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); |
| } |
| if ((xmlStrcasecmp((const xmlChar *) uri->scheme, BAD_CAST "urn") != 0) |
| && (xmlStrcasecmp((const xmlChar *) uri->scheme, BAD_CAST "dav") !=0) |
| && (xmlStrlen((const xmlChar *) uri->server) == 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 |
| */ |
| XML_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); |
| } |
| |
| /* |
| * Validate the XML document encoding value, if provided. |
| */ |
| if (doc->charset != XML_CHAR_ENCODING_UTF8) { |
| xmlC14NErr(ctx, (xmlNodePtr) doc, XML_C14N_REQUIRES_UTF8, |
| "xmlC14NNewCtx: source document not in UTF8\n"); |
| return (NULL); |
| } |
| |
| /* |
| * Allocate a new xmlC14NCtxPtr and fill the fields. |
| */ |
| ctx = (xmlC14NCtxPtr) xmlMalloc(sizeof(xmlC14NCtx)); |
| if (ctx == NULL) { |
| xmlC14NErrMemory("creating context"); |
| return (NULL); |
| } |
| XML_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, |
| (xmlC14NIsVisibleCallback)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 HAVE_ZLIB_H |
| 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 */ |