feat(webui): console authorization, RBAC, redaction, and audit model (Closes #633)

Phase 1 of the MCP Control Plane Web Console (#631) defines the model that
future gated writes must pass through, and enables none of them.

The read-only MVP (#426-#436) ships with no authentication; protection comes
from network placement alone (#435). That is adequate while every route is a
GET and inadequate the moment Phase 2 wires a write. This lands the authority
first, so no write can later be added without something to check it against.

webui/console_authz.py
  Identity sources (none / local-dev / access-proxy), a four-role matrix
  (viewer, operator, controller, admin), the privileged-action list, and a
  fail-closed authorize(). Every action maps to a task_key in
  task_capability_map, so the console cannot invent an authority the MCP layer
  does not already define. Roles are always server-side configuration, never a
  client assertion. Deny reasons are closed and enumerated; there is no
  implicit allow branch, and even an allow reports execution_enabled=false
  while ACTIVE_PHASE is 1.

webui/console_redaction.py
  One redaction pass for API payloads, rendered HTML, logs, and audit records.
  Reuses gitea_audit.redact as the shared authority rather than forking it,
  then adds console patterns for keychain references, credential assignments,
  PEM private-key blocks, and JWTs. Never raises: an unredactable value
  degrades to the placeholder rather than being emitted raw.

webui/console_audit.py
  Console-side audit records, which gitea_audit cannot supply: it records MCP
  mutations and carries no console actor, identity source, correlation id, or
  retention class, and an authorization denial is not a mutation at all. The
  two are additive and join on correlation.request_id. Records are redacted at
  build time, re-scanned at write time, and dropped rather than persisted if
  they still trip a detector. Retention is per-record; an unknown action is
  retained as privileged rather than standard.

webui/app.py
  Attaches an authorization block to the existing preview and attempt routes
  and records the decision. The terminal outcome is unchanged - gated_actions
  still fails closed for every action - so this cannot loosen anything. Adds
  GET /api/console/security-model publishing the three policies as JSON.

Probe authentication is deliberately declarative in this slice:
probe_auth_required() reports operator intent and no route consults it. The
documentation says so plainly and a regression test pins the not-enforced
status, so wiring it in Phase 2 is a deliberate change rather than a silent
one. An operator who sets the variable believing it protects a probe would be
worse off than one who knows it does not.

Tests: tests/test_webui_console_authz_audit.py - 75 passed, 93 subtests,
covering each acceptance criterion and each test the issue requires
(redaction units, default-deny for unauthenticated write stubs, audit record
creation for a simulated privileged preview).

Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
This commit is contained in:
2026-07-22 14:37:35 -05:00
co-authored by Claude Opus 4.8
parent 9eb0f29cef
commit 479e434f92
7 changed files with 2069 additions and 1 deletions
+80
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@@ -2,6 +2,7 @@
from __future__ import annotations
import uuid
from datetime import datetime, timezone
from starlette.applications import Starlette
@@ -19,6 +20,9 @@ from final_report_validator import FINAL_REPORT_TASK_KINDS
from webui.gated_actions import attempt_action, load_action_registry, preview_action
from webui.gated_action_views import render_actions_page
from webui import console_audit
from webui.console_authz import authorize, rbac_matrix, resolve_principal
from webui.console_redaction import redaction_policy
from webui.audit_validator import audit_report, audit_to_dict
from webui.audit_views import render_audit_page
from webui.lease_loader import load_lease_snapshot, snapshot_to_dict as lease_snapshot_to_dict
@@ -215,6 +219,49 @@ async def api_actions(_request: Request) -> JSONResponse:
return JSONResponse(load_action_registry().to_dict())
def _request_id() -> str:
return f"req-{uuid.uuid4().hex}"
def _audit_target(action_id: str, params: dict[str, object]) -> dict[str, object]:
"""Describe the action target for the audit record (never secrets)."""
if "pr_number" in params:
return {"kind": "pr", "ref": f"#{params['pr_number']}"}
if "issue_number" in params:
return {"kind": "issue", "ref": f"#{params['issue_number']}"}
if "branch_name" in params:
return {"kind": "branch", "ref": str(params["branch_name"])}
return {"kind": "unspecified", "ref": action_id}
def _authorize_request(
request: Request,
action_id: str,
params: dict[str, object],
*,
for_execution: bool,
result: str,
) -> dict[str, object]:
"""Resolve principal, decide, and audit. Returns the decision payload.
Phase 1 records the decision rather than enforcing it as the terminal
outcome: ``webui.gated_actions`` already fails closed for every action, so
this layer cannot loosen anything. Phase 2 enforces on this same decision.
"""
principal = resolve_principal(headers=dict(request.headers))
decision = authorize(action_id, principal, for_execution=for_execution)
console_audit.record_event(
action_id=action_id,
result=result,
decision=decision,
principal=principal,
target=_audit_target(action_id, params),
request_id=_request_id(),
detail=decision.detail,
)
return decision.to_dict()
async def api_action_preview(request: Request) -> JSONResponse:
action_id = request.path_params["action_id"]
params = dict(request.query_params)
@@ -224,6 +271,13 @@ async def api_action_preview(request: Request) -> JSONResponse:
result = preview_action(action_id, **params)
if "error" in result:
return JSONResponse(result, status_code=404)
result["authorization"] = _authorize_request(
request,
action_id,
params,
for_execution=False,
result=console_audit.RESULT_PREVIEWED,
)
return JSONResponse(result)
@@ -237,10 +291,31 @@ async def api_action_attempt(request: Request) -> JSONResponse:
if not isinstance(body, dict):
body = {}
result = attempt_action(action_id, **body)
authorization = _authorize_request(
request,
action_id,
body,
for_execution=True,
result=(
console_audit.RESULT_DENIED
if not result.get("success")
else console_audit.RESULT_ALLOWED
),
)
result["authorization"] = authorization
status = 403 if not result.get("success") else 200
return JSONResponse(result, status_code=status)
async def api_console_security_model(_request: Request) -> JSONResponse:
"""Read-only publication of the #633 authorization/redaction/audit model."""
return JSONResponse({
"rbac": rbac_matrix(),
"redaction": redaction_policy(),
"audit": console_audit.audit_policy(),
})
async def method_not_allowed(request: Request, _exc: Exception) -> Response:
path = request.url.path
if path in _AUDIT_MUTATION_PATHS and request.method == "POST":
@@ -291,6 +366,11 @@ def create_app(*, bind_host: str | None = None) -> Starlette:
methods=["POST"],
),
Route("/api/leases", api_leases, methods=["GET"]),
Route(
"/api/console/security-model",
api_console_security_model,
methods=["GET"],
),
],
exception_handlers={405: method_not_allowed},
)
+281
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@@ -0,0 +1,281 @@
"""Console audit event schema, retention, and append-only sink (#633).
``gitea_audit`` records MCP-side *mutations*: which profile and Gitea user
performed which tool call. It carries no console actor, no identity source, no
correlation identifier, and no retention class, so it cannot answer the
question #633 exists to answer — *who sat at the console, what did they
attempt, and was it authorized?* An authorization denial is not a mutation and
would never appear there at all.
This module adds the console-side record. It does not replace ``gitea_audit``:
when a Phase 2 action eventually reaches MCP, both fire, correlated by
``correlation.request_id``.
Design constraints:
- **Redact before persist.** Every record passes through
``webui.console_redaction.redact_payload`` before serialization, so an
unredacted field is never durable.
- **Append-only.** Records are appended as JSON lines. Nothing here updates or
deletes; retention is metadata on each record, enforced by an operator-run
policy, never by silent rewriting.
- **Never raises.** Auditing must not break the request it describes. A failed
write returns ``False``.
- **Off by default.** With ``WEBUI_CONSOLE_AUDIT_LOG`` unset, events are still
*built* (so callers and tests see the schema) but nothing is written.
A record looks like this (synthetic values):
{"schema_version": 1, "event_id": "evt-0001",
"timestamp": "2026-07-22T10:16:42+00:00",
"actor": {"subject": "[email protected]", "role": "operator",
"identity_source": "access_proxy", "authenticated": true},
"action": "merge_pr", "action_class": "privileged",
"target": {"kind": "pr", "ref": "#123"},
"result": "denied", "reason_code": "insufficient_role",
"correlation": {"request_id": "req-abc", "session_id": null,
"mcp_task": "merge_pr", "mcp_permission": "gitea.pr.merge"},
"retention": {"class": "privileged", "days": 365,
"expires_at": "2027-07-22T10:16:42+00:00"},
"redacted": true}
Timestamps are timezone-aware ISO-8601 in UTC.
"""
from __future__ import annotations
import datetime
import json
import os
import uuid
from typing import Any
from webui import console_authz
from webui.console_redaction import redact_payload, scan_for_secrets
SCHEMA_VERSION = 1
AUDIT_LOG_ENV = "WEBUI_CONSOLE_AUDIT_LOG"
# Result vocabulary. ``denied`` is the one ``gitea_audit`` has no equivalent
# for: an authorization refusal never reaches the MCP layer.
RESULT_ALLOWED = "allowed"
RESULT_DENIED = "denied"
RESULT_PREVIEWED = "previewed"
RESULT_FAILED = "failed"
RESULT_SUCCEEDED = "succeeded"
RESULTS = frozenset(
{
RESULT_ALLOWED,
RESULT_DENIED,
RESULT_PREVIEWED,
RESULT_FAILED,
RESULT_SUCCEEDED,
}
)
# Retention classes and default lifetimes in days. Privileged and break-glass
# records outlive routine ones because they are what an incident review needs.
RETENTION_STANDARD = "standard"
RETENTION_PRIVILEGED = "privileged"
RETENTION_BREAK_GLASS = "break_glass"
RETENTION_DAYS: dict[str, int] = {
RETENTION_STANDARD: 90,
RETENTION_PRIVILEGED: 365,
RETENTION_BREAK_GLASS: 730,
}
# Fields every record must carry. Asserted by the test suite so a future edit
# cannot quietly drop one.
REQUIRED_FIELDS: tuple[str, ...] = (
"schema_version",
"event_id",
"timestamp",
"actor",
"action",
"action_class",
"target",
"result",
"reason_code",
"correlation",
"retention",
"redacted",
)
REQUIRED_ACTOR_FIELDS: tuple[str, ...] = (
"subject",
"role",
"identity_source",
"authenticated",
)
REQUIRED_CORRELATION_FIELDS: tuple[str, ...] = (
"request_id",
"session_id",
"mcp_task",
"mcp_permission",
)
def audit_log_path() -> str | None:
"""Configured sink path, or ``None`` when console auditing is off."""
return (os.environ.get(AUDIT_LOG_ENV) or "").strip() or None
def audit_enabled() -> bool:
return audit_log_path() is not None
def retention_class_for(action: console_authz.ConsoleAction | None) -> str:
"""Classify retention from the action, defaulting to the longest-lived.
An unknown action is treated as privileged rather than standard: for a
safety control the conservative direction is to keep the record longer.
"""
if action is None:
return RETENTION_PRIVILEGED
if action.break_glass:
return RETENTION_BREAK_GLASS
if action.privileged:
return RETENTION_PRIVILEGED
return RETENTION_STANDARD
def _retention_block(
retention_class: str, now: datetime.datetime
) -> dict[str, Any]:
days = RETENTION_DAYS.get(
retention_class, RETENTION_DAYS[RETENTION_PRIVILEGED]
)
return {
"class": retention_class,
"days": days,
"expires_at": (now + datetime.timedelta(days=days)).isoformat(),
}
def build_event(
*,
action_id: str,
result: str,
decision: console_authz.AuthorizationDecision | None = None,
principal: console_authz.Principal | None = None,
target: dict[str, Any] | None = None,
reason_code: str | None = None,
request_id: str | None = None,
session_id: str | None = None,
detail: str | None = None,
metadata: dict[str, Any] | None = None,
now: datetime.datetime | None = None,
event_id: str | None = None,
) -> dict[str, Any]:
"""Build one redacted, JSON-able console audit record.
Redaction runs here rather than at write time so an in-memory record handed
to a template or an API response is already clean.
"""
ts = now or datetime.datetime.now(datetime.timezone.utc)
action = console_authz.get_action(action_id)
who = principal or (
decision.principal if decision else console_authz.ANONYMOUS
)
resolved_result = result if result in RESULTS else RESULT_FAILED
resolved_reason = reason_code or (
decision.reason_code if decision else "unspecified"
)
retention_class = retention_class_for(action)
event: dict[str, Any] = {
"schema_version": SCHEMA_VERSION,
"event_id": event_id or f"evt-{uuid.uuid4().hex}",
"timestamp": ts.isoformat(),
"actor": who.to_dict(),
"action": action_id,
"action_class": action.action_class if action else "unknown",
"target": dict(target or {}),
"result": resolved_result,
"reason_code": resolved_reason,
"correlation": {
"request_id": request_id,
"session_id": session_id,
"mcp_task": action.task_key if action else None,
"mcp_permission": action.mcp_permission if action else None,
},
"retention": _retention_block(retention_class, ts),
"redacted": True,
"detail": detail,
"metadata": dict(metadata or {}),
}
if decision is not None:
# Deliberately *not* named "authorization": ``gitea_audit`` treats that
# substring as a secret key hint (it matches the HTTP Authorization
# header) and would replace this whole block with the placeholder.
event["decision"] = {
"allowed": decision.allowed,
"required_role": decision.required_role,
"requires_confirmation": decision.requires_confirmation,
"dual_control": decision.dual_control,
"break_glass": decision.break_glass,
"execution_enabled": decision.execution_enabled,
}
redacted = redact_payload(event)
if not isinstance(redacted, dict): # pragma: no cover - defensive
return {"schema_version": SCHEMA_VERSION, "redacted": True}
return redacted
def write_event(event: dict[str, Any], path: str | None = None) -> bool:
"""Append *event* as one JSON line. Never raises.
Returns ``True`` when a line was written, ``False`` when auditing is off or
the write failed. A record that still trips a secret detector is dropped
rather than persisted.
"""
sink = path or audit_log_path()
if not sink:
return False
try:
if scan_for_secrets(event):
return False
line = json.dumps(event, default=str, sort_keys=True)
with open(sink, "a", encoding="utf-8") as handle:
handle.write(line + "\n")
return True
except Exception:
return False
def record_event(**kwargs: Any) -> dict[str, Any]:
"""Build and persist one record; return the record either way.
Callers get the record back so it can be surfaced in a response or a test
regardless of whether a sink is configured.
"""
event = build_event(**kwargs)
written = write_event(event)
return {"event": event, "written": written}
def audit_policy() -> dict[str, Any]:
"""Machine-readable audit schema and retention defaults (never secrets)."""
return {
"schema_version": SCHEMA_VERSION,
"required_fields": list(REQUIRED_FIELDS),
"required_actor_fields": list(REQUIRED_ACTOR_FIELDS),
"required_correlation_fields": list(REQUIRED_CORRELATION_FIELDS),
"results": sorted(RESULTS),
"retention_defaults_days": dict(RETENTION_DAYS),
"sink_env": AUDIT_LOG_ENV,
"enabled": audit_enabled(),
"append_only": True,
"redact_before_persist": True,
"timestamp_format": "ISO-8601, timezone-aware, UTC",
"relationship_to_mcp_audit": (
"webui.console_audit records console intent and authorization "
"outcomes; gitea_audit records MCP mutations. A Phase 2 action "
"emits both, correlated by correlation.request_id."
),
}
+537
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@@ -0,0 +1,537 @@
"""Console authorization and RBAC model (#633, Phase 1).
The read-only MVP (#426#436) ships with no authentication: protection comes
from network placement alone (#435). That is adequate while every route is a
GET, and inadequate the moment Phase 2 wires a gated write. This module is the
authorization model those writes must go through, landed *before* any of them
exists so no write can be added without an authority to check against.
Phase 1 scope is the model itself: identity resolution, the role matrix, the
privileged-action list, and a fail-closed :func:`authorize`. It deliberately
does **not** enable any write. ``webui.gated_actions`` stays globally disabled,
so an allow decision here is necessary but never sufficient.
Two invariants hold for every caller:
- **Default deny.** An unrecognised action, an unknown role, or an absent
principal denies. There is no implicit allow branch and no "unless" clause.
- **Authorization is not execution.** :func:`authorize` returns a decision
record. It never calls MCP, never mutates, and never consults credentials.
"""
from __future__ import annotations
import json
import os
from dataclasses import asdict, dataclass, field
from typing import Any
from task_capability_map import required_permission, required_role
# --- Roles ------------------------------------------------------------------
# Ordered least to most authority. Higher ranks inherit every lower rank's
# permitted actions; the matrix below is expressed as a minimum required rank.
VIEWER = "viewer"
OPERATOR = "operator"
CONTROLLER = "controller"
ADMIN = "admin"
ROLE_ORDER: tuple[str, ...] = (VIEWER, OPERATOR, CONTROLLER, ADMIN)
_ROLE_RANK: dict[str, int] = {role: idx for idx, role in enumerate(ROLE_ORDER)}
ROLE_DESCRIPTIONS: dict[str, str] = {
VIEWER: "Read every console view. No write, ever, in any phase.",
OPERATOR: "Viewer, plus author-class work: claim, comment, open a PR.",
CONTROLLER: "Operator, plus reviewer/merger-class decisions on a PR.",
ADMIN: "Controller, plus destructive and policy-editing actions.",
}
# --- Identity sources -------------------------------------------------------
IDENTITY_NONE = "none"
IDENTITY_LOCAL_DEV = "local_dev"
IDENTITY_ACCESS_PROXY = "access_proxy"
IDENTITY_SOURCES: dict[str, dict[str, Any]] = {
IDENTITY_NONE: {
"description": (
"No authentication configured. Every request is anonymous and "
"capped at viewer. This is the MVP default and the only mode "
"whose safety rests entirely on network placement (#435)."
),
"authenticated": False,
"safe_for_shared_host": False,
"phase_available": 1,
},
IDENTITY_LOCAL_DEV: {
"description": (
"Developer-supplied principal read from the environment. INSECURE: "
"the subject and role are asserted, never verified. Loopback only."
),
"authenticated": True,
"safe_for_shared_host": False,
"phase_available": 1,
},
IDENTITY_ACCESS_PROXY: {
"description": (
"Subject asserted by a trusted access proxy (Cloudflare Access, "
"WARP, or an org VPN portal) via a verified request header. The "
"proxy performs authentication; the console performs authorization."
),
"authenticated": True,
"safe_for_shared_host": True,
"phase_available": 2,
},
}
# Environment configuration. All are read server-side and never rendered.
AUTH_MODE_ENV = "WEBUI_AUTH_MODE"
DEV_SUBJECT_ENV = "WEBUI_DEV_SUBJECT"
DEV_ROLE_ENV = "WEBUI_DEV_ROLE"
ROLE_MAP_ENV = "WEBUI_ROLE_MAP"
REQUIRE_PROBE_AUTH_ENV = "WEBUI_REQUIRE_PROBE_AUTH"
ACCESS_SUBJECT_HEADER = "cf-access-authenticated-user-email"
# --- Action classes ---------------------------------------------------------
CLASS_READ = "read"
CLASS_WRITE = "gated_write"
CLASS_PRIVILEGED = "privileged"
CLASS_DESTRUCTIVE = "destructive"
# --- Privileged action list -------------------------------------------------
# ``task_key`` ties each console action back to ``task_capability_map``, so the
# console cannot invent an authority the MCP layer does not already define.
@dataclass(frozen=True)
class ConsoleAction:
"""One console action and the authority required to invoke it."""
action_id: str
task_key: str
action_class: str
minimum_role: str
requires_confirmation: bool
dual_control: bool
break_glass: bool
phase: int
summary: str
@property
def mcp_permission(self) -> str:
return required_permission(self.task_key)
@property
def mcp_role(self) -> str:
return required_role(self.task_key)
@property
def privileged(self) -> bool:
return self.action_class in {CLASS_PRIVILEGED, CLASS_DESTRUCTIVE}
def to_dict(self) -> dict[str, Any]:
data = asdict(self)
data["mcp_permission"] = self.mcp_permission
data["mcp_role"] = self.mcp_role
data["privileged"] = self.privileged
return data
_ACTION_SPECS: tuple[ConsoleAction, ...] = (
ConsoleAction(
action_id="claim_issue",
task_key="claim_issue",
action_class=CLASS_WRITE,
minimum_role=OPERATOR,
requires_confirmation=True,
dual_control=False,
break_glass=False,
phase=2,
summary="Apply status:in-progress to an issue.",
),
ConsoleAction(
action_id="comment_issue",
task_key="comment_issue",
action_class=CLASS_WRITE,
minimum_role=OPERATOR,
requires_confirmation=True,
dual_control=False,
break_glass=False,
phase=2,
summary="Post an issue comment.",
),
ConsoleAction(
action_id="create_issue",
task_key="create_issue",
action_class=CLASS_WRITE,
minimum_role=OPERATOR,
requires_confirmation=True,
dual_control=False,
break_glass=False,
phase=2,
summary="Open a new tracking issue.",
),
ConsoleAction(
action_id="comment_pr",
task_key="comment_pr",
action_class=CLASS_WRITE,
minimum_role=OPERATOR,
requires_confirmation=True,
dual_control=False,
break_glass=False,
phase=2,
summary="Post a PR thread comment.",
),
ConsoleAction(
action_id="create_pr",
task_key="create_pr",
action_class=CLASS_WRITE,
minimum_role=OPERATOR,
requires_confirmation=True,
dual_control=False,
break_glass=False,
phase=2,
summary="Open a PR from a locked feature branch.",
),
ConsoleAction(
action_id="review_pr",
task_key="review_pr",
action_class=CLASS_PRIVILEGED,
minimum_role=CONTROLLER,
requires_confirmation=True,
dual_control=False,
break_glass=False,
phase=3,
summary="Submit an approve / request-changes verdict.",
),
ConsoleAction(
action_id="close_pr",
task_key="close_pr",
action_class=CLASS_PRIVILEGED,
minimum_role=CONTROLLER,
requires_confirmation=True,
dual_control=False,
break_glass=False,
phase=3,
summary="Close a pull request without merging.",
),
ConsoleAction(
action_id="merge_pr",
task_key="merge_pr",
action_class=CLASS_PRIVILEGED,
minimum_role=CONTROLLER,
requires_confirmation=True,
dual_control=True,
break_glass=True,
phase=3,
summary="Merge an approved pull request.",
),
ConsoleAction(
action_id="delete_branch",
task_key="delete_branch",
action_class=CLASS_DESTRUCTIVE,
minimum_role=ADMIN,
requires_confirmation=True,
dual_control=True,
break_glass=True,
phase=3,
summary="Remove a remote feature branch.",
),
)
ACTIONS: dict[str, ConsoleAction] = {a.action_id: a for a in _ACTION_SPECS}
def privileged_actions() -> tuple[ConsoleAction, ...]:
"""Actions requiring dual control, break-glass, or controller+ authority."""
return tuple(a for a in _ACTION_SPECS if a.privileged)
def get_action(action_id: str) -> ConsoleAction | None:
return ACTIONS.get(action_id)
# --- Principals -------------------------------------------------------------
@dataclass(frozen=True)
class Principal:
"""Who is making a request, and how strongly that is known."""
subject: str
role: str
identity_source: str
authenticated: bool
warnings: tuple[str, ...] = field(default_factory=tuple)
@property
def rank(self) -> int:
return _ROLE_RANK.get(self.role, -1)
def to_dict(self) -> dict[str, Any]:
return {
"subject": self.subject,
"role": self.role,
"identity_source": self.identity_source,
"authenticated": self.authenticated,
"warnings": list(self.warnings),
}
ANONYMOUS = Principal(
subject="anonymous",
role=VIEWER,
identity_source=IDENTITY_NONE,
authenticated=False,
warnings=("No authentication configured; capped at viewer.",),
)
def auth_mode(env: dict[str, str] | None = None) -> str:
"""Resolve the configured identity source, defaulting to ``none``."""
source = env if env is not None else os.environ
raw = (source.get(AUTH_MODE_ENV) or "").strip().lower().replace("-", "_")
if raw in IDENTITY_SOURCES:
return raw
return IDENTITY_NONE
def _role_map(env: dict[str, str]) -> dict[str, str]:
"""Parse ``WEBUI_ROLE_MAP`` (JSON subject→role). Invalid config yields {}."""
raw = (env.get(ROLE_MAP_ENV) or "").strip()
if not raw:
return {}
try:
parsed = json.loads(raw)
except Exception:
return {}
if not isinstance(parsed, dict):
return {}
return {
str(k): str(v).strip().lower()
for k, v in parsed.items()
if str(v).strip().lower() in _ROLE_RANK
}
def resolve_principal(
headers: dict[str, str] | None = None,
env: dict[str, str] | None = None,
) -> Principal:
"""Resolve the requesting principal. Unknown or unconfigured → anonymous.
Never raises and never trusts a client-supplied role: the role always comes
from server-side configuration keyed by the resolved subject.
"""
source_env = dict(env) if env is not None else dict(os.environ)
lowered = {str(k).lower(): str(v) for k, v in (headers or {}).items()}
mode = auth_mode(source_env)
if mode == IDENTITY_LOCAL_DEV:
subject = (source_env.get(DEV_SUBJECT_ENV) or "").strip()
if not subject:
return ANONYMOUS
role = (source_env.get(DEV_ROLE_ENV) or VIEWER).strip().lower()
if role not in _ROLE_RANK:
role = VIEWER
return Principal(
subject=subject,
role=role,
identity_source=IDENTITY_LOCAL_DEV,
authenticated=True,
warnings=(
"local-dev identity is asserted, not verified; never use "
"outside loopback.",
),
)
if mode == IDENTITY_ACCESS_PROXY:
subject = (lowered.get(ACCESS_SUBJECT_HEADER) or "").strip()
if not subject:
# Proxy mode with no proxy header means the request did not
# traverse the proxy. Fail closed rather than trust it.
return ANONYMOUS
role = _role_map(source_env).get(subject, VIEWER)
return Principal(
subject=subject,
role=role,
identity_source=IDENTITY_ACCESS_PROXY,
authenticated=True,
)
return ANONYMOUS
def probe_auth_required(env: dict[str, str] | None = None) -> bool:
"""Whether non-public probes must be authenticated. Default False.
#633 requires the console to *fail closed on missing auth for non-public
health probes if configured*. The default stays off so the MVP ``/health``
contract is unchanged; an operator opts in explicitly.
"""
source = env if env is not None else os.environ
return (source.get(REQUIRE_PROBE_AUTH_ENV) or "").strip().lower() in {
"1",
"true",
"yes",
}
# --- Authorization ----------------------------------------------------------
DENY_UNKNOWN_ACTION = "unknown_action"
DENY_UNAUTHENTICATED = "unauthenticated"
DENY_INSUFFICIENT_ROLE = "insufficient_role"
DENY_UNKNOWN_ROLE = "unknown_role"
DENY_PHASE_NOT_ACTIVE = "phase_not_active"
ALLOW_PREVIEW = "allowed_preview_only"
# Phase 1 is the only active console phase. Phase 2 opens gated writes and is
# gated on this model landing; nothing here enables it.
ACTIVE_PHASE = 1
@dataclass(frozen=True)
class AuthorizationDecision:
"""Result of an authorization check. Never an execution grant."""
allowed: bool
reason_code: str
detail: str
action_id: str
principal: Principal
required_role: str | None = None
action_class: str | None = None
requires_confirmation: bool = False
dual_control: bool = False
break_glass: bool = False
execution_enabled: bool = False
def to_dict(self) -> dict[str, Any]:
return {
"allowed": self.allowed,
"reason_code": self.reason_code,
"detail": self.detail,
"action_id": self.action_id,
"principal": self.principal.to_dict(),
"required_role": self.required_role,
"action_class": self.action_class,
"requires_confirmation": self.requires_confirmation,
"dual_control": self.dual_control,
"break_glass": self.break_glass,
"execution_enabled": self.execution_enabled,
"active_phase": ACTIVE_PHASE,
}
def authorize(
action_id: str,
principal: Principal | None = None,
*,
for_execution: bool = False,
) -> AuthorizationDecision:
"""Decide whether *principal* may invoke *action_id*. Deny by default.
``for_execution`` distinguishes a read-only preview from a real invocation.
Even an allowed decision reports ``execution_enabled=False`` while the
console is in Phase 1, so no caller can read an allow as permission to
mutate.
"""
who = principal if principal is not None else ANONYMOUS
action = get_action(action_id)
if action is None:
return AuthorizationDecision(
allowed=False,
reason_code=DENY_UNKNOWN_ACTION,
detail=f"No console action registered as {action_id!r}.",
action_id=action_id,
principal=who,
)
base: dict[str, Any] = {
"action_id": action_id,
"principal": who,
"required_role": action.minimum_role,
"action_class": action.action_class,
"requires_confirmation": action.requires_confirmation,
"dual_control": action.dual_control,
"break_glass": action.break_glass,
"execution_enabled": False,
}
if not who.authenticated:
return AuthorizationDecision(
allowed=False,
reason_code=DENY_UNAUTHENTICATED,
detail=(
"Write actions require an authenticated principal; this "
"request is anonymous."
),
**base,
)
if who.rank < 0:
return AuthorizationDecision(
allowed=False,
reason_code=DENY_UNKNOWN_ROLE,
detail=f"Role {who.role!r} is not in the console role matrix.",
**base,
)
if who.rank < _ROLE_RANK[action.minimum_role]:
return AuthorizationDecision(
allowed=False,
reason_code=DENY_INSUFFICIENT_ROLE,
detail=(
f"Action {action_id!r} requires {action.minimum_role!r}; "
f"principal holds {who.role!r}."
),
**base,
)
if for_execution and action.phase > ACTIVE_PHASE:
return AuthorizationDecision(
allowed=False,
reason_code=DENY_PHASE_NOT_ACTIVE,
detail=(
f"Action {action_id!r} belongs to phase {action.phase}; the "
f"console is in phase {ACTIVE_PHASE}. Execution is not wired."
),
**base,
)
return AuthorizationDecision(
allowed=True,
reason_code=ALLOW_PREVIEW,
detail=(
"Principal holds the required role. Preview only — execution "
"remains disabled until the Phase 2 action framework ships."
),
**base,
)
def rbac_matrix() -> dict[str, Any]:
"""Machine-readable RBAC matrix and privileged-action list."""
return {
"model_version": 1,
"active_phase": ACTIVE_PHASE,
"roles": [
{
"role": role,
"rank": _ROLE_RANK[role],
"description": ROLE_DESCRIPTIONS[role],
"permitted_actions": sorted(
a.action_id
for a in _ACTION_SPECS
if _ROLE_RANK[role] >= _ROLE_RANK[a.minimum_role]
),
}
for role in ROLE_ORDER
],
"identity_sources": IDENTITY_SOURCES,
"actions": [a.to_dict() for a in _ACTION_SPECS],
"privileged_actions": [a.action_id for a in privileged_actions()],
"default_decision": "deny",
"execution_enabled": False,
}
+169
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@@ -0,0 +1,169 @@
"""Secret redaction policy for every console surface (#633).
The MVP already redacts MCP-side mutation records through ``gitea_audit``.
This module is the console-facing policy: one redaction pass applied to API
payloads, rendered HTML, log lines, and audit records *before* they leave the
server or reach persistent storage.
Design constraints:
- **Reuse, never fork.** ``gitea_audit.redact`` remains the authority for
secret-looking dict keys, ``Authorization`` material, and raw URLs. This
module runs that pass first and then applies console-specific patterns for
keychain references, key/value assignments, private-key blocks, and JWTs.
- **Never raises.** Redaction is a safety control; a malformed payload must
degrade to a redacted placeholder rather than propagate an exception.
- **Redact before persist.** ``webui.console_audit`` calls this module before
writing, so an unredacted record is never durable.
"""
from __future__ import annotations
import json
import re
from typing import Any
import gitea_audit
REDACTED = gitea_audit.REDACTED
# Console-specific patterns applied after the shared ``gitea_audit`` pass.
# Each keeps the identifying key so an operator can still tell *what* was
# removed, and replaces only the secret run itself.
_KEYCHAIN_REF = re.compile(r"(?i)\bkeychain:[\w.\-/@]+")
_KEYCHAIN_CMD = re.compile(
r"(?i)\bsecurity\s+find-(?:generic|internet)-password\b[^\n]*"
)
_ASSIGNMENT = re.compile(
r"(?i)\b(token|password|passwd|secret|api[_-]?key|access[_-]?key|"
r"client[_-]?secret|private[_-]?key)\b(\s*[:=]\s*)"
r"(\"[^\"]*\"|'[^']*'|\S+)"
)
_ENV_ASSIGNMENT = re.compile(
r"(?i)\b(GITEA_(?:TOKEN|PASS|PASSWORD)[A-Z0-9_]*)(\s*=\s*)"
r"(\"[^\"]*\"|'[^']*'|\S+)"
)
_PRIVATE_KEY_BLOCK = re.compile(
r"-----BEGIN [A-Z ]*PRIVATE KEY-----.*?-----END [A-Z ]*PRIVATE KEY-----",
re.S,
)
_JWT = re.compile(
r"\beyJ[A-Za-z0-9_\-]{8,}\.[A-Za-z0-9_\-]{8,}\.[A-Za-z0-9_\-]{8,}\b"
)
# Shapes that mean a payload still carries a secret. ``scan_for_secrets`` uses
# these to assert a surface is clean.
_DETECTORS: tuple[tuple[str, re.Pattern[str]], ...] = (
("keychain_reference", _KEYCHAIN_REF),
("keychain_command", _KEYCHAIN_CMD),
("credential_assignment", _ASSIGNMENT),
("credential_env_assignment", _ENV_ASSIGNMENT),
("private_key_block", _PRIVATE_KEY_BLOCK),
("json_web_token", _JWT),
("bearer_credential", re.compile(r"(?i)\b(?:bearer|basic)\s+\S{8,}")),
)
def _mask_assignment(match: re.Match[str]) -> str:
"""Keep the key and separator, replace the value."""
return f"{match.group(1)}{match.group(2)}{REDACTED}"
def redact_text(text: Any) -> Any:
"""Redact secret material from a single string.
Non-strings are returned unchanged so this is safe to map over mixed
payloads. Runs the shared ``gitea_audit`` pass first, then the
console-specific patterns.
"""
if not isinstance(text, str) or not text:
return text
try:
out = gitea_audit.redact(text)
if not isinstance(out, str): # defensive; redact() returns str for str
return REDACTED
out = _PRIVATE_KEY_BLOCK.sub(f"{REDACTED}_PRIVATE_KEY", out)
out = _ENV_ASSIGNMENT.sub(_mask_assignment, out)
out = _ASSIGNMENT.sub(_mask_assignment, out)
out = _KEYCHAIN_CMD.sub(f"{REDACTED}_KEYCHAIN_COMMAND", out)
out = _KEYCHAIN_REF.sub(f"{REDACTED}_KEYCHAIN_REF", out)
out = _JWT.sub(f"{REDACTED}_JWT", out)
return out
except Exception:
# Fail closed: an unredactable string is dropped rather than emitted raw.
return REDACTED
def redact_payload(value: Any) -> Any:
"""Recursively redact a JSON-able payload for any console surface.
Secret-looking dict keys are replaced wholesale by the shared
``gitea_audit`` policy; every remaining string is run through
:func:`redact_text`.
"""
try:
shared = gitea_audit.redact(value)
except Exception:
return REDACTED
return _walk(shared)
def _walk(value: Any) -> Any:
if isinstance(value, dict):
return {k: _walk(v) for k, v in value.items()}
if isinstance(value, (list, tuple)):
return [_walk(v) for v in value]
if isinstance(value, str):
return redact_text(value)
return value
def scan_for_secrets(value: Any) -> list[str]:
"""Return detector names that still match *value* after serialization.
Used to assert an outbound payload or rendered page is clean. An empty
list means no known secret shape was found. Already-redacted hits are not
findings.
"""
if isinstance(value, str):
text = value
else:
try:
text = json.dumps(value, default=str)
except Exception:
text = str(value)
findings: list[str] = []
for name, pattern in _DETECTORS:
for match in pattern.finditer(text):
if REDACTED in match.group(0):
continue
findings.append(name)
break
return findings
def redaction_policy() -> dict[str, Any]:
"""Machine-readable statement of the redaction rules (never secrets)."""
return {
"policy_version": 1,
"applies_to": [
"json_api_responses",
"rendered_html",
"server_logs",
"audit_records",
],
"ordering": "shared gitea_audit pass, then console patterns",
"redact_before_persist": True,
"shared_rules": {
"source": "gitea_audit.redact",
"secret_key_hints": list(gitea_audit._SECRET_KEY_HINTS),
"secret_value_prefixes": list(gitea_audit._SECRET_VALUE_PREFIXES),
"urls": "credentials, secret query parameters, and real hosts redacted",
},
"console_rules": [
{"name": name, "pattern": pattern.pattern}
for name, pattern in _DETECTORS
],
"placeholder": REDACTED,
"failure_mode": "fail closed — unredactable values become the placeholder",
}