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scan.py
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scan.py
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from pathlib import Path
from typing import Any, Optional, Sequence, Type
import click
from pygitguardian import GGClient
from pygitguardian.iac_models import IaCScanParameters, IaCScanResult
from pygitguardian.models import Detail
from ggshield.cmd.common_options import add_common_options
from ggshield.core.client import create_client_from_config
from ggshield.core.config import Config
from ggshield.core.errors import APIKeyCheckError
from ggshield.core.filter import init_exclusion_regexes
from ggshield.core.text_utils import display_error
from ggshield.iac.filter import get_iac_files_from_paths
from ggshield.iac.policy_id import POLICY_ID_PATTERN, validate_policy_id
from ggshield.output import OutputHandler
from ggshield.output.json.iac_json_output_handler import IaCJSONOutputHandler
from ggshield.output.text.iac_text_output_handler import IaCTextOutputHandler
from ggshield.scan import ScanCollection, ScanContext, ScanMode
def validate_exclude(_ctx: Any, _param: Any, value: Sequence[str]) -> Sequence[str]:
invalid_excluded_policies = [
policy_id for policy_id in value if not validate_policy_id(policy_id)
]
if len(invalid_excluded_policies) > 0:
raise ValueError(
f"The policies {invalid_excluded_policies} do not match the pattern '{POLICY_ID_PATTERN.pattern}'"
)
return value
@click.command()
@click.option(
"--exit-zero",
is_flag=True,
help="Always return 0 (non-error) status code.",
)
@click.option(
"--minimum-severity",
"minimum_severity",
type=click.Choice(("LOW", "MEDIUM", "HIGH", "CRITICAL")),
help="Minimum severity of the policies",
)
@click.option("--verbose", "-v", is_flag=True, help="Verbose display mode.")
@click.option(
"--ignore-policy",
"--ipo",
"ignore_policies",
multiple=True,
help="Policies to exclude from the results.",
callback=validate_exclude,
)
@click.option(
"--ignore-path",
"--ipa",
"ignore_paths",
default=None,
type=click.Path(),
multiple=True,
help="Do not scan the specified paths.",
)
@click.option("--json", is_flag=True, help="JSON output.")
@click.argument(
"directory",
type=click.Path(exists=True, readable=True, path_type=Path, file_okay=False),
required=False,
)
@add_common_options()
@click.pass_context
def scan_cmd(
ctx: click.Context,
exit_zero: bool,
minimum_severity: str,
ignore_policies: Sequence[str],
ignore_paths: Sequence[str],
json: bool,
directory: Optional[Path],
**kwargs: Any,
) -> int:
"""
Scan a directory for IaC vulnerabilities.
"""
if directory is None:
directory = Path().resolve()
update_context(ctx, exit_zero, minimum_severity, ignore_policies, ignore_paths)
result = iac_scan(ctx, directory)
scan = ScanCollection(id=str(directory), type="path_scan", iac_result=result)
output_handler_cls: Type[OutputHandler]
if json:
output_handler_cls = IaCJSONOutputHandler
else:
output_handler_cls = IaCTextOutputHandler
config: Config = ctx.obj["config"]
output_handler = output_handler_cls(
show_secrets=False, verbose=config.user_config.verbose
)
return output_handler.process_scan(scan)
def update_context(
ctx: click.Context,
exit_zero: bool,
minimum_severity: str,
ignore_policies: Sequence[str],
ignore_paths: Sequence[str],
) -> None:
config: Config = ctx.obj["config"]
ctx.obj["client"] = create_client_from_config(config)
if ignore_paths is not None:
config.user_config.iac.ignored_paths.update(ignore_paths)
ctx.obj["exclusion_regexes"] = init_exclusion_regexes(
config.user_config.iac.ignored_paths
)
if ignore_policies is not None:
config.user_config.iac.ignored_policies.update(ignore_policies)
if exit_zero is not None:
config.user_config.exit_zero = exit_zero
if minimum_severity is not None:
config.user_config.iac.minimum_severity = minimum_severity
def iac_scan(ctx: click.Context, directory: Path) -> Optional[IaCScanResult]:
files = get_iac_files_from_paths(
path=directory,
exclusion_regexes=ctx.obj["exclusion_regexes"],
verbose=ctx.obj["config"].verbose,
# If the repository is a git repository, ignore untracked files
ignore_git=False,
)
config = ctx.obj["config"]
client = ctx.obj["client"]
scan_parameters = IaCScanParameters(
config.user_config.iac.ignored_policies, config.user_config.iac.minimum_severity
)
scan = client.iac_directory_scan(
directory,
files.filenames,
scan_parameters,
ScanContext(
command_path=ctx.command_path,
scan_mode=ScanMode.IAC_DIRECTORY,
).get_http_headers(),
)
if not scan.success or not isinstance(scan, IaCScanResult):
handle_scan_error(client, scan)
return None
return scan
def handle_scan_error(client: GGClient, detail: Detail) -> None:
if detail.status_code == 401:
raise APIKeyCheckError(client.base_uri, "Invalid API key.")
display_error("\nError scanning.")
display_error(str(detail))