Пример #1
0
int cli_process_ooxml(cli_ctx *ctx)
{
#if HAVE_LIBXML2 && HAVE_JSON
    uint32_t loff = 0;

    cli_dbgmsg("in cli_processooxml\n");
    if (!ctx) {
        return CL_ENULLARG;
    }

    /* find "[Content Types].xml" */
    if (unzip_search(ctx, "[Content_Types].xml", 18, &loff) != CL_VIRUS) {
        cli_dbgmsg("cli_process_ooxml: failed to find ""[Content_Types].xml""!\n");
        return CL_EFORMAT;
    }
    cli_dbgmsg("cli_process_ooxml: found ""[Content_Types].xml"" @ %x\n", loff);

    return unzip_single_internal(ctx, loff, ooxml_content_cb);
#else
    cli_dbgmsg("in cli_processooxml\n");
#if !HAVE_LIBXML2
    cli_dbgmsg("cli_process_ooxml: libxml2 needs to enabled!");
#endif
#if !HAVE_JSON
    cli_dbgmsg("cli_process_ooxml: libjson needs to enabled!");
#endif
    return CL_SUCCESS;
#endif
}
Пример #2
0
int cli_ooxml_filetype(cli_ctx *ctx, fmap_t *map)
{
    struct zip_requests requests;
    int ret;

    memset(&requests, 0, sizeof(struct zip_requests));

    if ((ret = unzip_search_add(&requests, "xl/", 3)) != CL_SUCCESS) {
        return CL_SUCCESS;
    }
    if ((ret = unzip_search_add(&requests, "ppt/", 4)) != CL_SUCCESS) {
        return CL_SUCCESS;
    }
    if ((ret = unzip_search_add(&requests, "word/", 5)) != CL_SUCCESS) {
        return CL_SUCCESS;
    }

    if ((ret = unzip_search(ctx, map, &requests)) == CL_VIRUS) {
        switch (requests.found) {
        case 0:
            return CL_TYPE_OOXML_XL;
        case 1:
            return CL_TYPE_OOXML_PPT;
        case 2:
            return CL_TYPE_OOXML_WORD;
        default:
            return CL_SUCCESS;
        }
    }

    return CL_SUCCESS;
}
Пример #3
0
static int ooxml_content_cb(int fd, cli_ctx *ctx)
{
    int ret = CL_SUCCESS;
    int core=0, extn=0, cust=0, dsig=0;
    const xmlChar *name, *value, *CT, *PN;
    xmlTextReaderPtr reader = NULL;
    uint32_t loff;

    cli_dbgmsg("in ooxml_content_cb\n");

    reader = xmlReaderForFd(fd, "[Content_Types].xml", NULL, 0);
    if (reader == NULL) {
        cli_dbgmsg("ooxml_content_cb: xmlReaderForFd error for ""[Content_Types].xml""\n");
        return CL_SUCCESS; // libxml2 failed!
    }

    /* locate core-properties, extended-properties, and custom-properties (optional)  */
    while (xmlTextReaderRead(reader) == 1) {
        name = xmlTextReaderConstLocalName(reader);
        if (name == NULL) continue;

        if (strcmp(name, "Override")) continue;

        if (!xmlTextReaderHasAttributes(reader)) continue;

        CT = NULL; PN = NULL;
        while (xmlTextReaderMoveToNextAttribute(reader) == 1) {
            name = xmlTextReaderConstLocalName(reader);
            value = xmlTextReaderConstValue(reader);
            if (name == NULL || value == NULL) continue;

            if (!xmlStrcmp(name, "ContentType")) {
                CT = value;
            }
            else if (!xmlStrcmp(name, "PartName")) {
                PN = value;
            }

            cli_dbgmsg("%s: %s\n", name, value);
        }

        if (!CT && !PN) continue;

        if (!core && !xmlStrcmp(CT, "application/vnd.openxmlformats-package.core-properties+xml")) {
            /* default: /docProps/core.xml*/
            if (unzip_search(ctx, PN+1, xmlStrlen(PN)-1, &loff) != CL_VIRUS) {
                cli_dbgmsg("cli_process_ooxml: failed to find core properties file \"%s\"!\n", PN);
            }
            else {
                cli_dbgmsg("ooxml_content_cb: found core properties file \"%s\" @ %x\n", PN, loff);
                ret = unzip_single_internal(ctx, loff, ooxml_core_cb);
            }
            core = 1;
        }
        else if (!extn && !xmlStrcmp(CT, "application/vnd.openxmlformats-officedocument.extended-properties+xml")) {
            /* default: /docProps/app.xml */
            if (unzip_search(ctx, PN+1, xmlStrlen(PN)-1, &loff) != CL_VIRUS) {
                cli_dbgmsg("cli_process_ooxml: failed to find extended properties file \"%s\"!\n", PN);
            }
            else {
                cli_dbgmsg("ooxml_content_cb: found extended properties file \"%s\" @ %x\n", PN, loff);
                ret = unzip_single_internal(ctx, loff, ooxml_extn_cb);
            }
            extn = 1;
        }
        else if (!cust && !xmlStrcmp(CT, "application/vnd.openxmlformats-officedocument.custom-properties+xml")) {
            /* default: /docProps/custom.xml */
            if (unzip_search(ctx, PN+1, xmlStrlen(PN)-1, &loff) != CL_VIRUS) {
                cli_dbgmsg("cli_process_ooxml: failed to find custom properties file \"%s\"!\n", PN);
            }
            else {
                cli_dbgmsg("ooxml_content_cb: found custom properties file \"%s\" @ %x\n", PN, loff);
                /* custom properties ignored for now */
                cli_jsonbool(ctx->wrkproperty, "CustomProperties", 1);
                //ret = unzip_single_internal(ctx, loff, ooxml_cust_cb);
            }
            cust = 1;
        }
        else if (!dsig && !xmlStrcmp(CT, "application/vnd.openxmlformats-package.digital-signature-xmlsignature+xml")) {
            if (unzip_search(ctx, PN+1, xmlStrlen(PN)-1, &loff) != CL_VIRUS) {
                cli_dbgmsg("cli_process_ooxml: failed to find digital signature file \"%s\"!\n", PN);
            }
            else {
                cli_dbgmsg("ooxml_content_cb: found digital signature file \"%s\" @ %x\n", PN, loff);
                /* digital signatures ignored for now */
                cli_jsonbool(ctx->wrkproperty, "DigitalSignatures", 1);
                //ret = unzip_single_internal(ctx, loff, ooxml_dsig_cb);
            }
            dsig = 1;
        }

        if (ret != CL_SUCCESS)
            goto ooxml_content_exit;
    }

    if (!core) {
        cli_dbgmsg("cli_process_ooxml: file does not contain core properties file\n");
    }
    if (!extn) {
        cli_dbgmsg("cli_process_ooxml: file does not contain extended properties file\n");
    }
    if (!cust) {
        cli_dbgmsg("cli_process_ooxml: file does not contain custom properties file\n");
    }

 ooxml_content_exit:
    xmlTextReaderClose(reader);
    xmlFreeTextReader(reader);
    return ret;
}