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159 | """
Demonstrate verifier-side payload revalidation behavior.
Usage:
python3 backend/scripts/payload_revalidation_poc_demo.py
"""
from __future__ import annotations
import sys
from pathlib import Path
REPO_ROOT = Path(__file__).resolve().parents[2]
if str(REPO_ROOT) not in sys.path:
sys.path.insert(0, str(REPO_ROOT))
from backend.app.services.payload_revalidation_poc import ( # noqa: E402
match_payload_to_verified_domains,
)
CASES = [
{
"label": "Exact match",
"payload": "https://acme.example/pay",
"verified_domains": ["acme.example"],
"allow_subdomains": False,
},
{
"label": "WWW normalization",
"payload": "https://www.acme.example/menu",
"verified_domains": ["acme.example"],
"allow_subdomains": False,
},
{
"label": "Subdomain blocked by exact-only policy",
"payload": "https://login.acme.example/sign-in",
"verified_domains": ["acme.example"],
"allow_subdomains": False,
},
{
"label": "Subdomain allowed by policy",
"payload": "https://login.acme.example/sign-in",
"verified_domains": ["acme.example"],
"allow_subdomains": True,
},
{
"label": "Phishing mismatch",
"payload": "https://evil.example/redirect?target=acme.example",
"verified_domains": ["acme.example"],
"allow_subdomains": False,
},
{
"label": "Credential removed after issuance",
"payload": "https://acme.example/pay",
"verified_domains": [],
"allow_subdomains": False,
},
]
STATE_CHANGE_SCENARIOS = [
{
"label": "Issuer rotates verified payment host after issuance",
"payload": "https://acme.example/pay",
"steps": [
{
"state_label": "Initial issuer state",
"verified_domains": ["acme.example"],
"allow_subdomains": False,
},
{
"state_label": "Issuer state after host rotation",
"verified_domains": ["pay.acme.example"],
"allow_subdomains": False,
},
{
"state_label": "Issuer state after restoring original host",
"verified_domains": ["acme.example"],
"allow_subdomains": False,
},
],
},
{
"label": "Issuer tightens subdomain policy after issuance",
"payload": "https://login.acme.example/sign-in",
"steps": [
{
"state_label": "Initial issuer state with subdomains allowed",
"verified_domains": ["acme.example"],
"allow_subdomains": True,
},
{
"state_label": "Issuer state after subdomain policy tightened",
"verified_domains": ["acme.example"],
"allow_subdomains": False,
},
],
},
{
"label": "Issuer removes credential record and later re-approves it",
"payload": "https://merchant.acme.example/redeem",
"steps": [
{
"state_label": "Initial issuer state",
"verified_domains": ["acme.example"],
"allow_subdomains": True,
},
{
"state_label": "Issuer state after record removal",
"verified_domains": [],
"allow_subdomains": True,
},
{
"state_label": "Issuer state after re-approval",
"verified_domains": ["acme.example"],
"allow_subdomains": True,
},
],
},
]
def main() -> None:
print("Payload Revalidation PoC")
print("========================")
for case in CASES:
decision = match_payload_to_verified_domains(
case["payload"],
case["verified_domains"],
allow_subdomains=case["allow_subdomains"],
)
print(f"{case['label']}: {'ALLOW' if decision.allowed else 'BLOCK'}")
print(f" payload: {case['payload']}")
print(f" reason: {decision.reason}")
print()
print("Issuer-state change scenarios")
print("=============================")
for scenario in STATE_CHANGE_SCENARIOS:
print(scenario["label"])
print(f" payload: {scenario['payload']}")
for step in scenario["steps"]:
decision = match_payload_to_verified_domains(
scenario["payload"],
step["verified_domains"],
allow_subdomains=step["allow_subdomains"],
)
print(
f" {step['state_label']}:"
f" {'ALLOW' if decision.allowed else 'BLOCK'}"
)
print(f" verified_domains: {step['verified_domains']}")
print(f" allow_subdomains: {step['allow_subdomains']}")
print(f" reason: {decision.reason}")
if __name__ == "__main__":
main()
|