+ Docker image integrity verifier

scripts/docker_integrity/README.md

@@ -0,0 +1,33 @@
+This script verifies the integrity of Golem's Docker hub images.
+
+In order to do that, a registry of docker images required by Golem is defined in
+the `image_integrity.ini` file that has a format of:
+
+```
+golemfactory/image_name        1.0             sha256-hash-of-the-image
+```
+
+The registry holds entries valid for the current branch and must include only
+production images.
+
+To run verification, just launch the script:
+
+`./scripts/docker_integrity/verify.py`
+
+To ensure that all docker images used by Golem are included in the verification
+check, add a `--verify-coverage` flag:
+
+`./scripts/docker_integrity/verify.py --verify-coverage`
+
+This detects situations when Golem's images have been updated without including
+them in the verification and, at the same time, should prevent accidental updates
+that cause non-production images to make it into the major branch.
+
+The script will run through all images listed in the registry and will produce
+a consistent report.
+
+If all images are found intact, it will exit normally, with an exit code of `0`.
+
+Should it encounter hash mismatches, it will produce a failure report and an
+exit code of `1`. It will also exit erroneously if any errors are encountered
+that would prevent correct verification of images.

scripts/docker_integrity/image_integrity.ini

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+#
+# NEVER PUT NON-PRODUCTION IMAGES/TAGS INTO THIS FILE
+#
+# repository                    tag                 hash
+golemfactory/base               1.5                 93c72af33f5eefaf325f594f0f46237cb07c25bbc3a1283ae91eb70761dcd035
+golemfactory/blender            1.10                9d857c19e136e084edae95ba6982bb168f411e414ade50215d639f0c907df398
+golemfactory/blender_nvgpu      1.4                 ff84d6f5a84557eb6f2535b5bdb2caa3d4e720c96f960f934274869d7cc3aa63
+golemfactory/blender_verifier   1.5                 705f94c0e6944d792ac4c47330c443a0905e03c98a183ab6e8775b3717508628
+golemfactory/dummy              1.2                 60ba63d94c08ceebe67d8af6325fe37928d5178f0f7d340a195df5cf8d042d4b
+golemfactory/glambda            1.4                 2417d0fcde4a90d69b78a5552920beac8cca8d68283eace7c68ea231ea623b7b
+golemfactory/nvgpu              1.4                 7344c68586f06e61a1adae738d95d7dcd37306c6936c21ea06437326ba32b5f0
+golemfactory/wasm               0.3.0               fea1d5c524044bd889ebea906db49a4345cce78b2c7ab2f8c4ef4e71ffbebbb4

scripts/docker_integrity/verify.py

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+#!/usr/bin/env python
+import argparse
+import json
+import pathlib
+import re
+import requests
+from requests.status_codes import codes as http_codes
+import sys
+import typing
+
+DOCKERHUB_URI = 'https://registry.hub.docker.com/v2/'
+REPOSITORY_ROOT = 'golemfactory'
+IMAGES_FILE = pathlib.Path(__file__).parents[0] / 'image_integrity.ini'
+GOLEM_IMAGES_FILE = pathlib.Path(__file__).parents[2] / 'apps/images.ini'
+
+
+class COLORS(object):
+    RESET = '\033[0m'
+    RED = '\033[1;31m'
+    GREEN = '\033[1;32m'
+
+
+class AuthenticationError(Exception):
+    pass
+
+
+class ConfigurationError(Exception):
+    pass
+
+
+class CommunicationError(Exception):
+    pass
+
+
+class CoverageError(Exception):
+    pass
+
+
+def get_golem_images() -> dict:
+    images: dict = {}
+
+    with open(GOLEM_IMAGES_FILE) as f:
+        for l in f:
+            m = re.match(
+                r"(?P<repo>[\w._/]+)\s+\S+\s+(?P<tag>[\w.]+)", l)
+            if not m:
+                continue
+
+            images[m.group('repo')] = m.group('tag')
+
+    if not images:
+        raise ConfigurationError(
+            "Could not parse Golem `images.ini`. Format has changed?"
+        )
+
+    return images
+
+
+def get_images() -> dict:
+    images: dict = {}
+    with open(IMAGES_FILE) as f:
+        for l in f:
+            m = re.match(
+                r"(?P<repo>[\w._/]+)\s+(?P<tag>[\w.]+)\s+(?P<hash>\w+)?$", l)
+
+            if not m:
+                continue
+
+            m_repo = m.group('repo')
+            m_tag = m.group('tag')
+
+            repo = images.setdefault(m_repo, {})
+
+            if m_tag in repo and m.group('hash') != repo.get(m_tag):
+                raise ConfigurationError(
+                    f"{m_repo}:{m_tag} has a conflicting hash: "
+                    f"'{m.group('hash')}' vs '{repo.get(m_tag)}' "
+                    f"defined in '{IMAGES_FILE}'."
+                )
+            else:
+                repo[m.group('tag')] = m.group('hash')
+
+    return images
+
+
+def authenticate(repository: str):
+    r = requests.get(DOCKERHUB_URI)
+    if not r.status_code == http_codes.UNAUTHORIZED:
+        raise AuthenticationError(
+            f"Unexpected status code: {r.status_code} "
+            f"while retrieving: {DOCKERHUB_URI}"
+        )
+    auth_properties = {
+        g[0]: g[1]
+        for g in re.findall(
+            r"(\w+)=\"(.+?)\"", r.headers.get('Www-Authenticate', '')
+        )
+    }
+    realm = auth_properties.get('realm')
+    if not realm:
+        raise AuthenticationError(
+            f"Could not find expected auth header in: {r.headers}"
+        )
+    auth_r = requests.get(  # type:ignore
+        realm,
+        params={
+            'service': auth_properties.get('service'),
+            'scope': f'repository:{repository}:pull',
+        }
+    )
+    if not auth_r.status_code == http_codes.OK:
+        raise AuthenticationError(
+            f"Could not access: {realm}"
+        )
+    try:
+        token = auth_r.json().get('token')
+        return {
+            'Authorization': f'Bearer {token}',
+            'Accept': 'application/vnd.docker.distribution.manifest.v2+json'
+        }
+    except json.decoder.JSONDecodeError:
+        raise AuthenticationError(
+            f"Auth token not found in {auth_r.text}, retrieved from {realm}."
+        )
+
+
+def get_manifest(token: dict, repository: str, tag: str):
+    r = requests.get(
+        DOCKERHUB_URI + f'{repository}/manifests/{tag}',
+        headers=token
+    )
+    try:
+        manifest = r.json()
+        if not isinstance(manifest, dict):
+            raise CommunicationError(
+                f"Expected a dictionary, got {type(manifest)}: {manifest} "
+                f"for {repository}:{tag}"
+            )
+    except json.JSONDecodeError as e:
+        raise CommunicationError(
+            f"Failed to retrieve the correct manifest for {repository}:{tag}, "
+            f"got {r.status_code} - {r.text}"
+        ) from e
+
+    return manifest
+
+
+def get_info(repository: str, tag: str):
+    r = requests.get(DOCKERHUB_URI + f'repositories/{repository}/tags/{tag}/')
+    try:
+        info = r.json()
+        if not isinstance(info, dict):
+            raise CommunicationError(
+                f"Expected a dictionary, got {type(info)}: {info} "
+                f"for {repository}:{tag}"
+            )
+    except json.JSONDecodeError as e:
+        raise CommunicationError(
+            f"Failed to retrieve image info for {repository}:{tag}, "
+            f"got {r.status_code} - {r.text}"
+        ) from e
+
+    return info
+
+
+def verify_images() -> typing.Tuple[int, int]:
+    cnt_images = 0
+    cnt_failures = 0
+    for repository, tags in get_images().items():
+        token = authenticate(repository)
+        for tag, img_hash in tags.items():
+            cnt_images += 1
+            manifest = get_manifest(token, repository, tag)
+            manifest_hash = manifest.get('config', {}).get('digest', '')[7:]
+            if img_hash != manifest_hash:
+                last_updated = get_info(repository, tag).get('last_updated')
+                print(
+                    f'{repository}:{tag}: '
+                    f'{COLORS.RED}hash differs '
+                    f'(expected:{img_hash}, received:{manifest_hash}).'
+                    f'{COLORS.RESET}'
+                    f' Last updated: {last_updated}'
+                )
+                cnt_failures += 1
+            else:
+                print(
+                    f'{repository}:{tag}: {COLORS.GREEN}\u2713{COLORS.RESET}'
+                )
+
+    return cnt_images, cnt_failures
+
+
+def verify_coverage():
+    integrity_images = get_images()
+    for repository, tag in get_golem_images().items():
+        if tag not in integrity_images.get(repository):
+            raise CoverageError(
+                f'{repository}:{tag} is not present in {IMAGES_FILE}')
+
+
+def run_verification():
+
+    cnt_images, cnt_failures = verify_images()
+
+    if cnt_failures:
+        print(
+            f'{COLORS.RED}{cnt_failures} out of {cnt_images} images '
+            f'had modified hashes!{COLORS.RESET}'
+        )
+        sys.exit(1)
+
+    print(
+        f'{COLORS.GREEN}All {cnt_images} images successfully verified :)'
+        f'{COLORS.RESET}'
+    )
+    sys.exit(0)
+
+
+def run():
+
+    parser = argparse.ArgumentParser(
+        description="Verify integrity of Golem Docker hub images")
+    parser.add_argument(
+        '--verify-coverage',
+        help=f"Ensure all Golem images defined in {GOLEM_IMAGES_FILE} "
+             f"are checked for integrity.",
+        action='store_true',
+    )
+    args = parser.parse_args()
+
+    if args.verify_coverage:
+        print("Verifying coverage... ")
+        verify_coverage()
+        print(f"{COLORS.GREEN}All images protected :){COLORS.RESET}")
+
+    print("Verifying Golem Docker image integrity...")
+    run_verification()
+
+
+run()