Adding generate Threat-Model

modules/authentication/portal-authentication-token/doc/Threat-Model.adoc

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+= Portal Authentication Token Module - Threat Model
+:toc:
+:toclevels: 3
+
+Generated by https://codeium.com/windsurf 
+
+== Overview
+
+The Portal Authentication Token module provides functionality for handling JWT tokens in a portal environment, primarily focusing on token parsing, validation, and claim extraction. The module is built on top of SmallRye JWT and is designed to work with OAuth2/OpenID Connect providers, with specific testing against Keycloak.
+
+== System Context
+
+The module operates within the following context:
+
+* Processes JWT tokens from OAuth2/OpenID Connect providers
+* Validates token signatures using JWKS (JSON Web Key Sets)
+* Extracts and processes token claims
+* Handles multiple token types (Access, ID, Refresh)
+* Supports multiple issuers
+
+== STRIDE Threat Analysis
+
+=== Spoofing
+
+==== Threats
+* S1: Attacker submits forged JWT tokens
+* S2: Attacker impersonates legitimate JWKS endpoint
+* S3: Attacker reuses expired or revoked tokens
+
+==== Current Mitigations
+* Using SmallRye JWT for cryptographic operations
+* JWKS endpoint validation
+* Token signature verification
+* Expiration time validation
+
+==== Recommendations
+* Implement token blacklisting for revoked tokens
+* Add rate limiting for token validation attempts
+* Implement strict issuer validation
+* Add additional token metadata validation (e.g., `nbf`, `aud` claims)
+
+=== Tampering
+
+==== Threats
+* T1: Modification of token content during transmission
+* T2: Tampering with cached JWKS data
+* T3: Manipulation of token parsing process
+
+==== Current Mitigations
+* Signature verification using public keys
+* Size limits on tokens and payloads
+* Immutable token objects
+* Type-safe claim extraction
+
+==== Recommendations
+* Implement integrity checks for cached JWKS data
+* Add logging for signature verification failures
+* Implement strict content-type validation
+* Add checksums for cached data
+
+=== Repudiation
+
+==== Threats
+* R1: Denial of token usage
+* R2: Unauthorized token refresh attempts
+* R3: Missing audit trail for token operations
+
+==== Current Mitigations
+* Logging of token parsing attempts
+* Logging of validation failures
+* Token ID tracking
+
+==== Recommendations
+* Enhance logging with correlation IDs
+* Add structured logging for security events
+* Implement token usage tracking
+* Add audit logs for sensitive operations
+
+=== Information Disclosure
+
+==== Threats
+* I1: Exposure of sensitive claims
+* I2: Leakage of token data in logs
+* I3: Exposure of JWKS cache contents
+* I4: Debug information exposure
+
+==== Current Mitigations
+* Limited logging of token content
+* Size limits to prevent memory dumps
+* Secure error handling
+* No sensitive data in toString() methods
+
+==== Recommendations
+* Implement claim sanitization in logs
+* Add data masking for sensitive claims
+* Implement secure key storage for JWKS
+* Add security headers for external requests
+
+=== Denial of Service
+
+==== Threats
+* D1: JWKS endpoint flooding
+* D2: Large token processing
+* D3: Complex token structures
+* D4: Resource exhaustion through parallel requests
+
+==== Current Mitigations
+* Token size limits (8KB)
+* Payload size limits (16KB)
+* JWKS refresh interval controls
+* Null checks and validation
+
+==== Recommendations
+* Implement request throttling
+* Add circuit breakers for external calls
+* Implement resource pools
+* Add timeout mechanisms
+
+=== Elevation of Privilege
+
+==== Threats
+* E1: Token scope manipulation
+* E2: Role/permission injection
+* E3: Privilege escalation through claim manipulation
+* E4: Bypass of token validation
+
+==== Current Mitigations
+* Strict claim type checking
+* Signature validation
+* Non-nullable constraints
+* Type-safe claim extraction
+
+==== Recommendations
+* Implement role hierarchy validation
+* Add scope validation rules
+* Implement strict claim value validation
+* Add permission boundary checks
+
+== Critical Security Controls
+
+=== Input Validation
+* Token format validation
+* Size limits
+* Claim type checking
+* Issuer validation
+
+=== Output Encoding
+* Safe handling of token data in logs
+* Secure error messages
+* Claim value sanitization
+
+=== Authentication
+* Signature verification
+* Issuer validation
+* Token expiration checking
+
+=== Session Management
+* Token lifecycle handling
+* Refresh token security
+* Token state management
+
+=== Access Control
+* Role-based access control support
+* Scope validation
+* Permission checking
+
+=== Cryptographic Practices
+* Use of standard JWT libraries
+* JWKS handling
+* Key rotation support
+
+=== Error Handling
+* Secure error messages
+* Logging best practices
+* Exception handling
+
+=== Logging
+* Security event logging
+* Audit logging
+* Error logging
+
+== Security Configuration
+
+=== Required Settings
+* JWKS endpoint URL
+* Allowed issuers
+* Token validation rules
+* TLS configuration
+
+=== Optional Settings
+* JWKS refresh interval
+* Token size limits
+* Logging levels
+* Cache configuration
+
+== Implementation Guidelines
+
+=== Secure Coding Practices
+* Input validation for all token data
+* Type-safe claim handling
+* Immutable objects where possible
+* Secure error handling
+
+=== Testing Requirements
+* Security test cases
+* Boundary testing
+* Error condition testing
+* Performance testing
+
+== References
+
+* link:https://tools.ietf.org/html/rfc7519[JWT RFC 7519]
+* link:https://tools.ietf.org/html/rfc7515[JWS RFC 7515]
+* link:https://tools.ietf.org/html/rfc7517[JWK RFC 7517]
+* link:https://openid.net/specs/openid-connect-core-1_0.html[OpenID Connect Core]