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Security Model

ProviderFlow implements a strict security model with no arbitrary execution, ensuring safe webhook processing.

Core Security Principles​

1. No Arbitrary Execution​

ProviderFlow does not execute arbitrary JavaScript or runtime code.

  • ❌ No JavaScript execution
  • ❌ No arbitrary runtime code
  • ❌ No dynamic loading
  • ❌ No plugins or extensions
  • ✅ Deterministic YAML/DAG processing only

2. Contract Enforcement​

All processing is governed by the YAML contract definition.

  • ✅ Events validated against contract
  • ✅ Authentication boundaries enforced
  • ✅ Event types validated
  • ✅ Schema validation enforced

3. Authentication​

All webhook delivery is authenticated.

  • ✅ API key validation
  • ✅ Bearer token validation
  • ✅ Header-based authentication
  • ✅ Authentication boundaries enforced

4. Secret Redaction​

All secrets are redacted from logs and outputs.

  • ✅ API keys redacted
  • ✅ Tokens redacted
  • ✅ Credentials redacted
  • ✅ No secrets in traces

Authentication Methods​

API Key​

auth:
  type: api_key
  key: X-Stripe-Token
  value: sk_test_xxxxx
  • Validation: API key is validated against provider API
  • Redaction: API key is redacted from all outputs
  • Usage: Used for provider API authentication

Bearer Token​

auth:
  type: bearer
  token: {{STRIPE_API_KEY}}
  • Validation: Token is validated at runtime
  • Redaction: Token is redacted from all outputs
  • Usage: Used for delivery endpoint authentication

Header Authentication​

auth:
  type: header
  key: Authorization
  value: Bearer {{STRIPE_API_KEY}}
  • Validation: Header value is validated at runtime
  • Redaction: Token is redacted from all outputs
  • Usage: Used for provider API authentication

Input Validation​

Event Type Validation​

All incoming events are validated against the contract.

{
  "type": "payment_intent.succeeded",
  "data": {...}
}
  • ✅ Event type must be in contract
  • ✅ Event schema validated
  • ✅ Required fields checked
  • ✅ Type validation enforced

Schema Validation​

All event payloads are validated against the contract schema.

  • ✅ Required fields checked
  • ✅ Type validation enforced
  • ✅ Optional fields allowed
  • ✅ Invalid payloads rejected

Output Validation​

Golden File Comparison​

Output is compared against golden files.

  • ✅ Structure validated
  • ✅ Types validated
  • ✅ Values compared
  • ✅ Differences reported

Delivery Validation​

All deliveries are validated.

  • ✅ Authentication verified
  • ✅ HTTP status code checked
  • ✅ Response time monitored
  • ✅ Delivery failures logged

Secret Management​

Environment Variables​

Secrets are stored in environment variables.

export DATA_WAREHOUSE_TOKEN=your-token
  • ✅ Secrets never committed to git
  • ✅ Secrets redacted from logs
  • ✅ Secrets redacted from traces
  • ✅ Secrets only used at runtime

Redaction​

All secrets are redacted from outputs.

{
  "output": {...},
  "metadata": {
    "auth_token": "REDACTED",
    "api_key": "REDACTED"
  }
}

Audit Trail​

All operations are logged for audit purposes.

  • ✅ Event processing logged
  • ✅ Authentication attempts logged
  • ✅ Delivery failures logged
  • ✅ Errors and warnings logged

Trace Data​

Detailed traces are collected for each event.

{
  "event_id": "evt_12345",
  "timestamp": "2026-06-24T10:00:00Z",
  "contract": "stripe-v2",
  "endpoint": "payment-event",
  "target": "data-warehouse",
  "status": "success",
  "output": {...}
}

Attack Surface​

Attack Vector 1: Arbitrary Code Execution​

Mitigation: No JavaScript execution, no arbitrary runtime code.

  • ✅ YAML/DAG processing only
  • ✅ No plugins or extensions
  • ✅ No dynamic loading

Attack Vector 2: Authentication Bypass​

Mitigation: Authentication enforced at all boundaries.

  • ✅ Provider API authentication
  • ✅ Delivery endpoint authentication
  • ✅ Authentication boundaries enforced

Attack Vector 3: Schema Validation Bypass​

Mitigation: Schema validation enforced for all events.

  • ✅ Event type validation
  • ✅ Schema validation
  • ✅ Required field checking

Attack Vector 4: Secret Exposure​

Mitigation: Secret redaction from all outputs.

  • ✅ API keys redacted
  • ✅ Tokens redacted
  • ✅ Credentials redacted

Compliance​

ProviderFlow is designed for operator visibility and control:

  • ✅ All operations are auditable
  • ✅ All secrets are redacted
  • ✅ All validations are explicit
  • ✅ All operations are logged