Exemple #1
0
/**
 * Finalise XML parsing.
 */
int xml_complete(modsec_rec *msr, char **error_msg) {
    if (error_msg == NULL) return -1;
    *error_msg = NULL;

    /* Only if we have a context, meaning we've done some work. */
    if (msr->xml->parsing_ctx != NULL) {
        /* This is how we signalise the end of parsing to libxml. */
        xmlParseChunk(msr->xml->parsing_ctx, NULL, 0, 1);

        /* Preserve the results for our reference. */
        msr->xml->well_formed = msr->xml->parsing_ctx->wellFormed;
        msr->xml->doc = msr->xml->parsing_ctx->myDoc;

        /* Clean up everything else. */
        xmlFreeParserCtxt(msr->xml->parsing_ctx);
        msr->xml->parsing_ctx = NULL;
        msr_log(msr, 4, "XML: Parsing complete (well_formed %u).", msr->xml->well_formed);

        if (msr->xml->well_formed != 1) {
            *error_msg = ngx_pstrndup(msr->mp, "XML: Failed parsing document.");
            return -1;
        }
    }

    return 1;
}
Exemple #2
0
/**
 * Feed one chunk of data to the XML parser.
 */
int xml_process_chunk(modsec_rec *msr, const char *buf, unsigned int size, char **error_msg) {
    if (error_msg == NULL) return -1;
    *error_msg = NULL;

    /* We want to initialise our parsing context here, to
     * enable us to pass it the first chunk of data so that
     * it can attempt to auto-detect the encoding.
     */
    if (msr->xml->parsing_ctx == NULL) {

        /* First invocation. */

        msr_log(msr, 4, "XML: Initialising parser.");

        /* NOTE When Sax interface is used libxml will not
         *      create the document object, but we need it.

        msr->xml->sax_handler = (xmlSAXHandler *)ngx_pcalloc(msr->mp, sizeof(xmlSAXHandler));
        if (msr->xml->sax_handler == NULL) return -1;
        msr->xml->sax_handler->error = xml_receive_sax_error;
        msr->xml->sax_handler->warning = xml_receive_sax_error;
        msr->xml->parsing_ctx = xmlCreatePushParserCtxt(msr->xml->sax_handler, msr,
            buf, size, "body.xml");

        */

        msr->xml->parsing_ctx = xmlCreatePushParserCtxt(NULL, NULL, buf, size, "body.xml");
        if (msr->xml->parsing_ctx == NULL) {
            *error_msg = ngx_pstrndup(msr->mp, "XML: Failed to create parsing context.");
            return -1;
        }
    } else {

        /* Not a first invocation. */

        xmlParseChunk(msr->xml->parsing_ctx, buf, size, 0);
        if (msr->xml->parsing_ctx->wellFormed != 1) {
            *error_msg = ngx_pstrndup(msr->mp, "XML: Failed parsing document.");
            return -1;
        }
    }

    return 1;
}
Exemple #3
0
char* sf_var_exp(sf_vartable_t* handle, char *varexp, ngx_pool_t *pool)
{
    //char *dststr = (char*)sf_calloc(SF_MAX_VAR_SIZE);
    char *dststr = (char*)ngx_pcalloc(pool, SF_MAX_VAR_SIZE);
    char *c = varexp;
    char *d = dststr;
    while(*c != '\0')
    {
        if (*c=='(' && *(c+1)=='$')
        {
            char *p = c+1;
            while(*p && *p!=')')
            {
                p++;
            }
            if (*p == ')')
            {
                char *name;
                sf_vartable_t *v;

                name = ngx_pstrndup(pool, c+1, p-c-1);
                v = sf_var_search(handle, name);
                ngx_pfree(pool, name);
                if (v)
                {
                    size_t len = strlen(v->value);
		      if (d+len <dststr +SF_MAX_VAR_SIZE)
		      {
                    		strncpy(d, v->value, len);
                    		d = d + len;
                     }
                    		c= p + 1;
                }
                else
                {
		      if ((d + (p -c + 1)) < (dststr +SF_MAX_VAR_SIZE))
		      {
	                    strncpy(d, c, p-c+1);
	                    d = d + (p-c+1);
		      }
                    c = p + 1;
                }
            } else
            {
                strcpy(d, c);
                d = d+(p-c);
                c = p;
            }
        }
        else
            *d++ = *c++;
    }
    return dststr;
#if 0
    /* ÁÙʱ */
    sf_vartable_t *v =  sf_var_search(handle, varexp);
    if (v)
    {
        return sf_strdup(v->value);
    }
    else
    {
        return sf_strdup("");
    }
#endif
}