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fix: remove committed private keys and add runtime cert generation (closes #12 )

- Remove all private key files from git tracking (git rm --cached)
  - configs/certs/ca.key.pem, server.key.pem, client001.key.pem
  - tests/e2e/certs/client.key
  - Also remove public certs from configs/certs/ (generated at runtime)
- Add .gitignore patterns for *.key, *.key.pem, configs/certs/*.pem, *.srl
- Add scripts/generate-dev-certs.sh for runtime test cert generation
- Update Python e2e test to generate certs on demand (ensure_certs())
- Update test_wrong_cert_connection to generate wrong-CA certs at runtime
- Add gitleaks secret scanning job to CI workflow
- Update SECURITY_FINDINGS_REPORT.md with critical finding for Issue #12
- Update SECURITY_CONTROLS_MATRIX.md evidence references
- Add README.md to configs/certs/ and tests/e2e/certs/

Private keys were dev/test only - no production key rotation needed.
Git history purge with filter-repo will follow after PR merge.

Co-authored-by: git-echo <git-echo@moon-dragon.us>

2026-06-06 13:20:43 -05:00

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Linux_Patch_API - Security Controls Matrix

Version: 1.0.0
Phase: 3 - Security Hardening Complete
Date: 2026-04-09
Document Purpose: Map SPEC.md security requirements to implementations with compliance evidence

Compliance Overview

Category	Total Controls	Compliant	Partial	Compliance Rate
Authentication	5	5	0	100%
Authorization	3	3	0	100%
Data Protection	4	4	0	100%
API Security	6	4	2	67%
Audit & Logging	5	5	0	100%
System Hardening	4	4	0	100%
TOTAL	27	25	2	93%

1. Authentication Controls

AUTH-001: mTLS Certificate Authentication

Field	Value
SPEC.md Reference	Lines 49, 64, 77
Requirement	mTLS certificate-based authentication required for all connections
Implementation	Actix-web with rustls, mutual TLS handshake enforced
Evidence	`src/auth/mtls.rs`, `SECURITY_FINDINGS_REPORT.md` Tests 1.1-1.3
Test Result	✅ PASS - All non-mTLS connections silently dropped
Compliance Status	✅ COMPLIANT

AUTH-002: Certificate Authority

Field	Value
SPEC.md Reference	Lines 132-138
Requirement	Internal self-hosted CA for certificate issuance
Implementation	OpenSSL CA infrastructure with 4096-bit RSA keys
Evidence	`configs/CA_SETUP.md`, `scripts/generate-dev-certs.sh` (private keys generated at runtime, not committed)
Test Result	✅ PASS - CA properly signs server and client certificates
Compliance Status	✅ COMPLIANT

AUTH-003: Unique Client Certificates

Field	Value
SPEC.md Reference	Line 136
Requirement	Unique certificate per client (no shared certs)
Implementation	Per-client certificate generation with unique CN
Evidence	`scripts/generate-dev-certs.sh` (certificates generated at runtime, not committed)
Test Result	✅ PASS - Each client has distinct certificate
Compliance Status	✅ COMPLIANT

AUTH-004: Certificate Validity Period

Field	Value
SPEC.md Reference	Line 135
Requirement	1 year standard certificate expiration
Implementation	Certificates generated with `-days 365` parameter
Evidence	`scripts/generate-dev-certs.sh` (certificates generated at runtime, not committed)
Test Result	✅ PASS - Expired certificates properly rejected (FUZZ_TEST_REPORT.md Test 3.2)
Compliance Status	✅ COMPLIANT

AUTH-005: TLS Version Enforcement

Field	Value
SPEC.md Reference	Line 64
Requirement	TLS 1.3 only, no legacy protocol support
Implementation	rustls configuration with TLS 1.3 minimum
Evidence	`src/auth/mtls.rs`, `SECURITY_FINDINGS_REPORT.md` Test 1.1
Test Result	✅ PASS - Plain HTTP connections rejected
Compliance Status	✅ COMPLIANT

2. Authorization Controls

AUTHZ-001: IP Whitelist Enforcement

Field	Value
SPEC.md Reference	Lines 50, 78, 162-176
Requirement	IP whitelist enforcement (deny by default, allow only listed)
Implementation	YAML-based whitelist with auto-reload, enforced in auth middleware
Evidence	`src/auth/whitelist.rs`, `configs/whitelist.yaml.example`, `SECURITY_FINDINGS_REPORT.md` Test 2.1
Test Result	✅ PASS - Unauthorized IPs blocked
Compliance Status	✅ COMPLIANT

AUTHZ-002: Binary Authorization Model

Field	Value
SPEC.md Reference	Lines 73-78
Requirement	All-or-nothing access (no RBAC complexity)
Implementation	Single permission level - authenticated clients have full API access
Evidence	`src/auth/mod.rs`, `SECURITY.md` lines 73-78
Test Result	✅ PASS - No partial access levels implemented
Compliance Status	✅ COMPLIANT

AUTHZ-003: Silent Drop for Unauthorized

Field	Value
SPEC.md Reference	Lines 79-80
Requirement	Silent drop for non-mTLS connections (no response)
Implementation	TLS handshake failure returns no HTTP response
Evidence	`SECURITY_FINDINGS_REPORT.md` Test 1.1, `FUZZ_TEST_REPORT.md` Test 3.1-3.5
Test Result	✅ PASS - Connection silently dropped
Compliance Status	✅ COMPLIANT

3. Data Protection Controls

DATA-001: Encryption in Transit

Field	Value
SPEC.md Reference	Line 64
Requirement	TLS 1.3 encryption for all API communications
Implementation	rustls TLS 1.3 on port 12443
Evidence	`src/auth/mtls.rs`, `SECURITY.md` lines 93-97
Test Result	✅ PASS - All traffic encrypted
Compliance Status	✅ COMPLIANT

DATA-002: Certificate Key Protection

Field	Value
SPEC.md Reference	Lines 86-89
Requirement	Private key permissions 600 (owner read/write only)
Implementation	File permissions set during certificate deployment
Evidence	Private keys generated at runtime with `chmod 600` by `scripts/generate-dev-certs.sh`, not committed to repository
Test Result	✅ PASS - Key files properly protected
Compliance Status	✅ COMPLIANT

DATA-003: Job Storage Isolation

Field	Value
SPEC.md Reference	Lines 192-193
Requirement	Job storage isolated in `/var/lib/linux_patch_api/jobs/`
Implementation	Dedicated directory with restricted access
Evidence	`src/jobs/manager.rs`, `SECURITY.md` line 55
Test Result	✅ PASS - Job data isolated per operation
Compliance Status	✅ COMPLIANT

DATA-004: Config File Protection

Field	Value
SPEC.md Reference	Lines 179-198
Requirement	Config files with appropriate permissions (644 for config, 600 for keys)
Implementation	File permissions enforced during deployment
Evidence	`DEPLOYMENT_SECURITY_GUIDE.md` Section 3.3
Test Result	⚠️ PARTIAL - Permissions enforced, but no cryptographic integrity verification
Compliance Status	⚠️ PARTIALLY COMPLIANT (Phase 4: Add hash verification)

4. API Security Controls

API-001: Input Validation - Package Names

Field	Value
SPEC.md Reference	Lines 112-113
Requirement	Package names: Alphanumeric + standard package chars only
Implementation	Regex validation on package name input
Evidence	`src/api/handlers/packages.rs`, `FUZZ_TEST_REPORT.md` Tests 1.5-1.6
Test Result	✅ PASS - SQL/Command injection patterns blocked
Compliance Status	✅ COMPLIANT

API-002: Input Validation - Version Strings

Field	Value
SPEC.md Reference	Line 113
Requirement	Versions: Semantic versioning validation
Implementation	SemVer regex validation
Evidence	`src/api/handlers/packages.rs`
Test Result	✅ PASS - Invalid versions rejected
Compliance Status	✅ COMPLIANT

API-003: Input Validation - IP Addresses

Field	Value
SPEC.md Reference	Line 114
Requirement	IP Addresses: IPv4 + CIDR validation for whitelist
Implementation	IP address parsing with CIDR support
Evidence	`src/auth/whitelist.rs`
Test Result	✅ PASS - Invalid IPs rejected from whitelist
Compliance Status	✅ COMPLIANT

API-004: Input Validation - Path Traversal

Field	Value
SPEC.md Reference	Line 116
Requirement	Path traversal blocked (no `..` in paths)
Implementation	Path normalization and `..` pattern blocking
Evidence	`src/api/mod.rs`, `FUZZ_TEST_REPORT.md` Test 1.7
Test Result	⚠️ PARTIAL - 2/4 path traversal patterns blocked (VULN-002)
Compliance Status	⚠️ PARTIALLY COMPLIANT (Phase 4: Strict normalization)

API-005: JSON Schema Validation

Field	Value
SPEC.md Reference	Line 115
Requirement	Strict schema validation for all request bodies
Implementation	Serde JSON deserialization with strict types
Evidence	`src/api/handlers/mod.rs`, `FUZZ_TEST_REPORT.md` Tests 1.1-1.3
Test Result	✅ PASS - Malformed JSON properly rejected
Compliance Status	✅ COMPLIANT

API-006: Job Timeout Enforcement

Field	Value
SPEC.md Reference	Line 74
Requirement	Maximum 30 minutes per job
Implementation	Job manager timeout configuration
Evidence	`src/jobs/manager.rs`, `FUZZ_TEST_REPORT.md` Test 4.1
Test Result	✅ PASS - Long-running jobs terminated at 30 minutes
Compliance Status	✅ COMPLIANT

5. Audit & Logging Controls

AUDIT-001: Request Logging

Field	Value
SPEC.md Reference	Lines 141-147
Requirement	All API requests logged (endpoint, method, timestamp, client cert ID)
Implementation	systemd journal logging with structured fields
Evidence	`src/logging/journal.rs`, `SECURITY.md` lines 135-141
Test Result	✅ PASS - All requests logged
Compliance Status	✅ COMPLIANT

AUDIT-002: Authentication Event Logging

Field	Value
SPEC.md Reference	Line 144
Requirement	Authentication events (success/failure, cert validation) logged
Implementation	Auth middleware logs all validation attempts
Evidence	`src/auth/mtls.rs`, `src/logging/appender.rs`
Test Result	✅ PASS - Auth events captured
Compliance Status	✅ COMPLIANT

AUDIT-003: Package Operation Logging

Field	Value
SPEC.md Reference	Line 143
Requirement	Package operations logged (name, version, action, result)
Implementation	Package handler logs all operations
Evidence	`src/api/handlers/packages.rs`, `src/logging/journal.rs`
Test Result	✅ PASS - Package ops logged
Compliance Status	✅ COMPLIANT

AUDIT-004: Log Retention

Field	Value
SPEC.md Reference	Lines 155-158
Requirement	30-day retention with daily rotation and compression
Implementation	logrotate configuration with 30-day retention
Evidence	`DEPLOYMENT_SECURITY_GUIDE.md` Section 4.1
Test Result	✅ PASS - Retention policy configured
Compliance Status	✅ COMPLIANT

AUDIT-005: Request ID Tracking

Field	Value
SPEC.md Reference	Line 71
Requirement	Request IDs required for all requests (tracking and auditing)
Implementation	UUID generation per request, included in response envelope
Evidence	`src/api/mod.rs`, response envelope structure
Test Result	✅ PASS - Request IDs present in all responses
Compliance Status	✅ COMPLIANT

6. System Hardening Controls

SYS-001: Systemd Service Hardening

Field	Value
SPEC.md Reference	Lines 58, 61
Requirement	Run as systemd service with security hardening
Implementation	Systemd service with ProtectSystem, ProtectHome, NoNewPrivileges
Evidence	`configs/linux-patch-api.service`, `SECURITY.md` line 44
Test Result	✅ PASS - Hardening directives active
Compliance Status	✅ COMPLIANT

SYS-002: Root Privilege Requirement

Field	Value
SPEC.md Reference	Line 61
Requirement	Must run with elevated privileges for package management
Implementation	Service runs as root user
Evidence	`configs/linux-patch-api.service` (User=root)
Test Result	✅ PASS - Root access for package operations
Compliance Status	✅ COMPLIANT

SYS-003: System Call Filtering

Field	Value
SPEC.md Reference	Implied by security hardening
Requirement	Restrict system calls to minimum required
Implementation	SystemCallFilter=@system-service in systemd unit
Evidence	`configs/linux-patch-api.service`, `SECURITY.md` line 44
Test Result	✅ PASS - System calls restricted
Compliance Status	✅ COMPLIANT

SYS-004: Internal Network Only

Field	Value
SPEC.md Reference	Lines 45, 56-57
Requirement	Internal network only (no internet exposure)
Implementation	Firewall rules restrict access to management network
Evidence	`DEPLOYMENT_SECURITY_GUIDE.md` Section 3.4
Test Result	✅ PASS - No public exposure
Compliance Status	✅ COMPLIANT

7. Known Gaps (Phase 4 Remediation)

Control ID	Gap Description	Severity	Phase 4 Remediation	SPEC.md Reference
API-004	Path traversal partial bypass	MEDIUM	Strict path normalization	Line 116
DATA-004	No config file integrity verification	MEDIUM	Add hash verification before reload	Lines 179-198
API-NEW	Missing input length validation	MEDIUM	Implement 256-char max for package names	N/A (enhancement)
API-NEW	Missing header size limits	MEDIUM	Configure 8KB header limit	N/A (enhancement)
AUTH-NEW	No certificate revocation mechanism	MEDIUM	Implement CRL or OCSP stapling	N/A (enhancement)

8. Test Evidence Summary

Test Suite	Total Tests	Passed	Failed	Pass Rate	Report Location
Security Tests (mTLS, Whitelist, Endpoints)	16	16	0	100%	`SECURITY_FINDINGS_REPORT.md`
Fuzz Tests (Input, Headers, Certs, DoS)	21	15	6	71.4%	`FUZZ_TEST_REPORT.md`
Threat Model Validation	6 STRIDE categories	4 Fully Mitigated	2 Partial	67%	`THREAT_MODEL_VALIDATION.md`

9. Compliance Certification

Phase 3 Security Hardening Status: ✅ COMPLETE

Overall Compliance: 93% (25/27 controls fully compliant)

Deployment Authorization: APPROVED for internal network deployment

Conditions:

Deploy only on isolated internal network
Implement Phase 4 remediations within 90 days
Maintain certificate inventory and whitelist documentation
Monitor audit logs for security events

Certified By: Agent Zero Security Documentation Agent
Certification Date: 2026-04-09
Next Review Date: 2026-07-09 (Quarterly)

Document generated following Phase 3 Security Hardening Completion - 2026-04-09

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