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Diffstat (limited to 'meta/classes/vex.bbclass')
| -rw-r--r-- | meta/classes/vex.bbclass | 303 |
1 files changed, 303 insertions, 0 deletions
diff --git a/meta/classes/vex.bbclass b/meta/classes/vex.bbclass new file mode 100644 index 0000000000..402d8e0d96 --- /dev/null +++ b/meta/classes/vex.bbclass | |||
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| 1 | # | ||
| 2 | # Copyright OpenEmbedded Contributors | ||
| 3 | # | ||
| 4 | # SPDX-License-Identifier: MIT | ||
| 5 | # | ||
| 6 | |||
| 7 | # This class is used to generate metadata needed by external | ||
| 8 | # tools to check for vulnerabilities, for example CVEs. | ||
| 9 | # | ||
| 10 | # In order to use this class just inherit the class in the | ||
| 11 | # local.conf file and it will add the generate_vex task for | ||
| 12 | # every recipe. If an image is build it will generate a report | ||
| 13 | # in DEPLOY_DIR_IMAGE for all the packages used, it will also | ||
| 14 | # generate a file for all recipes used in the build. | ||
| 15 | # | ||
| 16 | # Variables use CVE_CHECK prefix to keep compatibility with | ||
| 17 | # the cve-check class | ||
| 18 | # | ||
| 19 | # Example: | ||
| 20 | # bitbake -c generate_vex openssl | ||
| 21 | # bitbake core-image-sato | ||
| 22 | # bitbake -k -c generate_vex universe | ||
| 23 | # | ||
| 24 | # The product name that the CVE database uses defaults to BPN, but may need to | ||
| 25 | # be overriden per recipe (for example tiff.bb sets CVE_PRODUCT=libtiff). | ||
| 26 | CVE_PRODUCT ??= "${BPN}" | ||
| 27 | CVE_VERSION ??= "${PV}" | ||
| 28 | |||
| 29 | CVE_CHECK_SUMMARY_DIR ?= "${LOG_DIR}/cve" | ||
| 30 | |||
| 31 | CVE_CHECK_SUMMARY_FILE_NAME_JSON = "cve-summary.json" | ||
| 32 | CVE_CHECK_SUMMARY_INDEX_PATH = "${CVE_CHECK_SUMMARY_DIR}/cve-summary-index.txt" | ||
| 33 | |||
| 34 | CVE_CHECK_DIR ??= "${DEPLOY_DIR}/cve" | ||
| 35 | CVE_CHECK_RECIPE_FILE_JSON ?= "${CVE_CHECK_DIR}/${PN}_cve.json" | ||
| 36 | CVE_CHECK_MANIFEST_JSON ?= "${IMGDEPLOYDIR}/${IMAGE_NAME}.json" | ||
| 37 | |||
| 38 | # Skip CVE Check for packages (PN) | ||
| 39 | CVE_CHECK_SKIP_RECIPE ?= "" | ||
| 40 | |||
| 41 | # Replace NVD DB check status for a given CVE. Each of CVE has to be mentioned | ||
| 42 | # separately with optional detail and description for this status. | ||
| 43 | # | ||
| 44 | # CVE_STATUS[CVE-1234-0001] = "not-applicable-platform: Issue only applies on Windows" | ||
| 45 | # CVE_STATUS[CVE-1234-0002] = "fixed-version: Fixed externally" | ||
| 46 | # | ||
| 47 | # Settings the same status and reason for multiple CVEs is possible | ||
| 48 | # via CVE_STATUS_GROUPS variable. | ||
| 49 | # | ||
| 50 | # CVE_STATUS_GROUPS = "CVE_STATUS_WIN CVE_STATUS_PATCHED" | ||
| 51 | # | ||
| 52 | # CVE_STATUS_WIN = "CVE-1234-0001 CVE-1234-0003" | ||
| 53 | # CVE_STATUS_WIN[status] = "not-applicable-platform: Issue only applies on Windows" | ||
| 54 | # CVE_STATUS_PATCHED = "CVE-1234-0002 CVE-1234-0004" | ||
| 55 | # CVE_STATUS_PATCHED[status] = "fixed-version: Fixed externally" | ||
| 56 | # | ||
| 57 | # All possible CVE statuses could be found in cve-check-map.conf | ||
| 58 | # CVE_CHECK_STATUSMAP[not-applicable-platform] = "Ignored" | ||
| 59 | # CVE_CHECK_STATUSMAP[fixed-version] = "Patched" | ||
| 60 | # | ||
| 61 | # CVE_CHECK_IGNORE is deprecated and CVE_STATUS has to be used instead. | ||
| 62 | # Keep CVE_CHECK_IGNORE until other layers migrate to new variables | ||
| 63 | CVE_CHECK_IGNORE ?= "" | ||
| 64 | |||
| 65 | # Layers to be excluded | ||
| 66 | CVE_CHECK_LAYER_EXCLUDELIST ??= "" | ||
| 67 | |||
| 68 | # Layers to be included | ||
| 69 | CVE_CHECK_LAYER_INCLUDELIST ??= "" | ||
| 70 | |||
| 71 | |||
| 72 | # set to "alphabetical" for version using single alphabetical character as increment release | ||
| 73 | CVE_VERSION_SUFFIX ??= "" | ||
| 74 | |||
| 75 | python () { | ||
| 76 | if bb.data.inherits_class("cve-check", d): | ||
| 77 | raise bb.parse.SkipRecipe("Skipping recipe: found incompatible combination of cve-check and vex enabled at the same time.") | ||
| 78 | |||
| 79 | from oe.cve_check import extend_cve_status | ||
| 80 | extend_cve_status(d) | ||
| 81 | } | ||
| 82 | |||
| 83 | def generate_json_report(d, out_path, link_path): | ||
| 84 | if os.path.exists(d.getVar("CVE_CHECK_SUMMARY_INDEX_PATH")): | ||
| 85 | import json | ||
| 86 | from oe.cve_check import cve_check_merge_jsons, update_symlinks | ||
| 87 | |||
| 88 | bb.note("Generating JSON CVE summary") | ||
| 89 | index_file = d.getVar("CVE_CHECK_SUMMARY_INDEX_PATH") | ||
| 90 | summary = {"version":"1", "package": []} | ||
| 91 | with open(index_file) as f: | ||
| 92 | filename = f.readline() | ||
| 93 | while filename: | ||
| 94 | with open(filename.rstrip()) as j: | ||
| 95 | data = json.load(j) | ||
| 96 | cve_check_merge_jsons(summary, data) | ||
| 97 | filename = f.readline() | ||
| 98 | |||
| 99 | summary["package"].sort(key=lambda d: d['name']) | ||
| 100 | |||
| 101 | with open(out_path, "w") as f: | ||
| 102 | json.dump(summary, f, indent=2) | ||
| 103 | |||
| 104 | update_symlinks(out_path, link_path) | ||
| 105 | |||
| 106 | python vex_save_summary_handler () { | ||
| 107 | import shutil | ||
| 108 | import datetime | ||
| 109 | from oe.cve_check import update_symlinks | ||
| 110 | |||
| 111 | cvelogpath = d.getVar("CVE_CHECK_SUMMARY_DIR") | ||
| 112 | |||
| 113 | bb.utils.mkdirhier(cvelogpath) | ||
| 114 | timestamp = datetime.datetime.now().strftime('%Y%m%d%H%M%S') | ||
| 115 | |||
| 116 | json_summary_link_name = os.path.join(cvelogpath, d.getVar("CVE_CHECK_SUMMARY_FILE_NAME_JSON")) | ||
| 117 | json_summary_name = os.path.join(cvelogpath, "cve-summary-%s.json" % (timestamp)) | ||
| 118 | generate_json_report(d, json_summary_name, json_summary_link_name) | ||
| 119 | bb.plain("Complete CVE JSON report summary created at: %s" % json_summary_link_name) | ||
| 120 | } | ||
| 121 | |||
| 122 | addhandler vex_save_summary_handler | ||
| 123 | vex_save_summary_handler[eventmask] = "bb.event.BuildCompleted" | ||
| 124 | |||
| 125 | python do_generate_vex () { | ||
| 126 | """ | ||
| 127 | Generate metadata needed for vulnerability checking for | ||
| 128 | the current recipe | ||
| 129 | """ | ||
| 130 | from oe.cve_check import get_patched_cves | ||
| 131 | |||
| 132 | try: | ||
| 133 | patched_cves = get_patched_cves(d) | ||
| 134 | cves_status = [] | ||
| 135 | products = d.getVar("CVE_PRODUCT").split() | ||
| 136 | for product in products: | ||
| 137 | if ":" in product: | ||
| 138 | _, product = product.split(":", 1) | ||
| 139 | cves_status.append([product, False]) | ||
| 140 | |||
| 141 | except FileNotFoundError: | ||
| 142 | bb.fatal("Failure in searching patches") | ||
| 143 | |||
| 144 | cve_write_data_json(d, patched_cves, cves_status) | ||
| 145 | } | ||
| 146 | |||
| 147 | addtask generate_vex before do_build | ||
| 148 | |||
| 149 | python vex_cleanup () { | ||
| 150 | """ | ||
| 151 | Delete the file used to gather all the CVE information. | ||
| 152 | """ | ||
| 153 | bb.utils.remove(e.data.getVar("CVE_CHECK_SUMMARY_INDEX_PATH")) | ||
| 154 | } | ||
| 155 | |||
| 156 | addhandler vex_cleanup | ||
| 157 | vex_cleanup[eventmask] = "bb.event.BuildCompleted" | ||
| 158 | |||
| 159 | python vex_write_rootfs_manifest () { | ||
| 160 | """ | ||
| 161 | Create VEX/CVE manifest when building an image | ||
| 162 | """ | ||
| 163 | |||
| 164 | import json | ||
| 165 | from oe.rootfs import image_list_installed_packages | ||
| 166 | from oe.cve_check import cve_check_merge_jsons, update_symlinks | ||
| 167 | |||
| 168 | deploy_file_json = d.getVar("CVE_CHECK_RECIPE_FILE_JSON") | ||
| 169 | if os.path.exists(deploy_file_json): | ||
| 170 | bb.utils.remove(deploy_file_json) | ||
| 171 | |||
| 172 | # Create a list of relevant recipies | ||
| 173 | recipies = set() | ||
| 174 | for pkg in list(image_list_installed_packages(d)): | ||
| 175 | pkg_info = os.path.join(d.getVar('PKGDATA_DIR'), | ||
| 176 | 'runtime-reverse', pkg) | ||
| 177 | pkg_data = oe.packagedata.read_pkgdatafile(pkg_info) | ||
| 178 | recipies.add(pkg_data["PN"]) | ||
| 179 | |||
| 180 | bb.note("Writing rootfs VEX manifest") | ||
| 181 | deploy_dir = d.getVar("IMGDEPLOYDIR") | ||
| 182 | link_name = d.getVar("IMAGE_LINK_NAME") | ||
| 183 | |||
| 184 | json_data = {"version":"1", "package": []} | ||
| 185 | text_data = "" | ||
| 186 | |||
| 187 | save_pn = d.getVar("PN") | ||
| 188 | |||
| 189 | for pkg in recipies: | ||
| 190 | # To be able to use the CVE_CHECK_RECIPE_FILE_JSON variable we have to evaluate | ||
| 191 | # it with the different PN names set each time. | ||
| 192 | d.setVar("PN", pkg) | ||
| 193 | |||
| 194 | pkgfilepath = d.getVar("CVE_CHECK_RECIPE_FILE_JSON") | ||
| 195 | if os.path.exists(pkgfilepath): | ||
| 196 | with open(pkgfilepath) as j: | ||
| 197 | data = json.load(j) | ||
| 198 | cve_check_merge_jsons(json_data, data) | ||
| 199 | else: | ||
| 200 | bb.warn("Missing cve file for %s" % pkg) | ||
| 201 | |||
| 202 | d.setVar("PN", save_pn) | ||
| 203 | |||
| 204 | link_path = os.path.join(deploy_dir, "%s.json" % link_name) | ||
| 205 | manifest_name = d.getVar("CVE_CHECK_MANIFEST_JSON") | ||
| 206 | |||
| 207 | with open(manifest_name, "w") as f: | ||
| 208 | json.dump(json_data, f, indent=2) | ||
| 209 | |||
| 210 | update_symlinks(manifest_name, link_path) | ||
| 211 | bb.plain("Image VEX JSON report stored in: %s" % manifest_name) | ||
| 212 | } | ||
| 213 | |||
| 214 | ROOTFS_POSTPROCESS_COMMAND:prepend = "vex_write_rootfs_manifest; " | ||
| 215 | do_rootfs[recrdeptask] += "do_generate_vex " | ||
| 216 | do_populate_sdk[recrdeptask] += "do_generate_vex " | ||
| 217 | |||
| 218 | def cve_write_data_json(d, cve_data, cve_status): | ||
| 219 | """ | ||
| 220 | Prepare CVE data for the JSON format, then write it. | ||
| 221 | Done for each recipe. | ||
| 222 | """ | ||
| 223 | |||
| 224 | from oe.cve_check import get_cpe_ids | ||
| 225 | import json | ||
| 226 | |||
| 227 | output = {"version":"1", "package": []} | ||
| 228 | nvd_link = "https://nvd.nist.gov/vuln/detail/" | ||
| 229 | |||
| 230 | fdir_name = d.getVar("FILE_DIRNAME") | ||
| 231 | layer = fdir_name.split("/")[-3] | ||
| 232 | |||
| 233 | include_layers = d.getVar("CVE_CHECK_LAYER_INCLUDELIST").split() | ||
| 234 | exclude_layers = d.getVar("CVE_CHECK_LAYER_EXCLUDELIST").split() | ||
| 235 | |||
| 236 | if exclude_layers and layer in exclude_layers: | ||
| 237 | return | ||
| 238 | |||
| 239 | if include_layers and layer not in include_layers: | ||
| 240 | return | ||
| 241 | |||
| 242 | product_data = [] | ||
| 243 | for s in cve_status: | ||
| 244 | p = {"product": s[0], "cvesInRecord": "Yes"} | ||
| 245 | if s[1] == False: | ||
| 246 | p["cvesInRecord"] = "No" | ||
| 247 | product_data.append(p) | ||
| 248 | product_data = list({p['product']:p for p in product_data}.values()) | ||
| 249 | |||
| 250 | package_version = "%s%s" % (d.getVar("EXTENDPE"), d.getVar("PV")) | ||
| 251 | cpes = get_cpe_ids(d.getVar("CVE_PRODUCT"), d.getVar("CVE_VERSION")) | ||
| 252 | package_data = { | ||
| 253 | "name" : d.getVar("PN"), | ||
| 254 | "layer" : layer, | ||
| 255 | "version" : package_version, | ||
| 256 | "products": product_data, | ||
| 257 | "cpes": cpes | ||
| 258 | } | ||
| 259 | |||
| 260 | cve_list = [] | ||
| 261 | |||
| 262 | for cve in sorted(cve_data): | ||
| 263 | issue_link = "%s%s" % (nvd_link, cve) | ||
| 264 | |||
| 265 | cve_item = { | ||
| 266 | "id" : cve, | ||
| 267 | "status" : cve_data[cve]["abbrev-status"], | ||
| 268 | "link": issue_link, | ||
| 269 | } | ||
| 270 | if 'NVD-summary' in cve_data[cve]: | ||
| 271 | cve_item["summary"] = cve_data[cve]["NVD-summary"] | ||
| 272 | cve_item["scorev2"] = cve_data[cve]["NVD-scorev2"] | ||
| 273 | cve_item["scorev3"] = cve_data[cve]["NVD-scorev3"] | ||
| 274 | cve_item["scorev4"] = cve_data[cve]["NVD-scorev4"] | ||
| 275 | cve_item["vector"] = cve_data[cve]["NVD-vector"] | ||
| 276 | cve_item["vectorString"] = cve_data[cve]["NVD-vectorString"] | ||
| 277 | if 'status' in cve_data[cve]: | ||
| 278 | cve_item["detail"] = cve_data[cve]["status"] | ||
| 279 | if 'justification' in cve_data[cve]: | ||
| 280 | cve_item["description"] = cve_data[cve]["justification"] | ||
| 281 | if 'resource' in cve_data[cve]: | ||
| 282 | cve_item["patch-file"] = cve_data[cve]["resource"] | ||
| 283 | cve_list.append(cve_item) | ||
| 284 | |||
| 285 | package_data["issue"] = cve_list | ||
| 286 | output["package"].append(package_data) | ||
| 287 | |||
| 288 | deploy_file = d.getVar("CVE_CHECK_RECIPE_FILE_JSON") | ||
| 289 | |||
| 290 | write_string = json.dumps(output, indent=2) | ||
| 291 | |||
| 292 | cvelogpath = d.getVar("CVE_CHECK_SUMMARY_DIR") | ||
| 293 | index_path = d.getVar("CVE_CHECK_SUMMARY_INDEX_PATH") | ||
| 294 | bb.utils.mkdirhier(cvelogpath) | ||
| 295 | bb.utils.mkdirhier(os.path.dirname(deploy_file)) | ||
| 296 | fragment_file = os.path.basename(deploy_file) | ||
| 297 | fragment_path = os.path.join(cvelogpath, fragment_file) | ||
| 298 | with open(fragment_path, "w") as f: | ||
| 299 | f.write(write_string) | ||
| 300 | with open(deploy_file, "w") as f: | ||
| 301 | f.write(write_string) | ||
| 302 | with open(index_path, "a+") as f: | ||
| 303 | f.write("%s\n" % fragment_path) | ||
