Editing Module Registry/Requirements (section)

= Software Requirements Specification =

for

Logos P2P Module Package Manager (ModMan)

Version 1.0, Prepared by Jarrad Hope 2024-12-27

<span id="introduction"></span>
== 1. Introduction ==

<span id="purpose"></span>
=== 1.1 Purpose ===

This Software Requirements Specification (SRS) document provides a detailed description of the Logos P2P Module Package Manager (ModMan). It outlines the functional and non-functional requirements for developing a secure, decentralized package management system that will serve as the primary module for handling module discovery, updates, versioning, and dependency resolution in the Logos Microkernel ecosystem.

<span id="document-conventions"></span>
=== 1.2 Document Conventions ===

This document follows these conventions:
* MUST/REQUIRED - Indicates a mandatory requirement for MVP
* SHOULD/RECOMMENDED - Indicates a requirement planned for subsequent releases
* MAY/OPTIONAL - Indicates an optional requirement
* TBD - Indicates details that are yet To Be Determined

<span id="intended-audience-and-reading-suggestions"></span>
=== 1.3 Intended Audience and Reading Suggestions ===

This document is intended for:
* Developers implementing the ModMan system
* System architects designing the Logos Microkernel ecosystem
* Security auditors reviewing the system design
* Quality assurance engineers testing the implementation
* Project managers overseeing development

For developers and architects, it is recommended to read the entire document sequentially. QA engineers should focus on sections 4 and 5. Project managers may want to focus on sections 1, 2, and the high-level aspects of section 4.

<span id="product-scope"></span>
=== 1.4 Product Scope ===

ModMan is a peer-to-peer system package manager designed specifically for the Logos Microkernel. Its primary purposes are:
* Serve as a decentralized application market for Logos modules
* Provide secure module discovery and distribution
* Handle module versioning and updates
* Manage dependencies between modules
* Support multiple hardware architectures
* Interface with the Logos Microkernel for module deployment
* Interface with the PDMS module for dependency resolution and versioning
* Interface with the Codex module for file-sharing and content delivery

<span id="references"></span>
=== 1.5 References ===

* Abate, P., Di Cosmo, R., Gousios, G., & Zacchiroli, S. (2020). Dependency Solving Is Still Hard, but We Are Getting Better at It. DOI: 10.1109/saner48275.2020.9054837
* Boyer, S. (2017). So You Want to Write a Package Manager. Medium.
* C. Dale, J. Liu, & Liu, J. (2009). Apt-P2p: A Peer-to-Peer Distribution System for Software Package Releases and Updates. DOI: 10.1109/infcom.2009.5061996
* Barrera, D., McCarney, D., Clark, J., & van Oorschot, P. C. (2014). Baton: Certificate Agility for Android’s Decentralized Signing Infrastructure. DOI: 10.1145/2627393.2627397
* Barrera, D. (2014). Securing Decentralized Software Installation and Updates.
* Brown, F., Mirian, A., Jaiswal, A., Nötzli, A., & Stefan, D. (2017). SPAM: A Secure Package Manager.
* Wurster, G., & van Oorschot, P. C. (2007). Self-Signed Executables: Restricting Replacement of Program Binaries by Malware.
* Hartman, J. H., & Cappos, J. (2008). Stork: Secure Package Management for VM Environments.
* Cappos, J., Samuel, J., Baker, S., & Hartman, J. H. (2008). A Look in the Mirror: Attacks on Package Managers. DOI: 10.1145/1455770.1455841
* Cappos, J., Samuel, J., Baker, S., & Hartman, J. (2008). Package Management Security.
* Sun, L. (2024). Securing Supply Chains in Open Source Ecosystems: Methodologies for Determining Version Numbers of Components Without Package Management Files. DOI: 10.54097/n8djwto1zb
* Catuogno, L., Galdi, C., & Persiano, G. (2020). Secure Dependency Enforcement in Package Management Systems. DOI: 10.1109/tdsc.2017.2777991
* McDaniel, P., & Enck, W. (2010). Not So Great Expectations: Why Application Markets Haven’t Failed Security. DOI: 10.1109/msp.2010.159
* Abate, P., Di Cosmo, R., Treinen, R., & Zacchiroli, S. (2013). A Modular Package Manager Architecture. DOI: 10.1016/j.infsof.2012.09.002
* Gu, Y., Liu, Y., Pu, Y., Hu, X., Chai, H., Wang, R., Gao, X., & Duan, H. (2023). Investigating Package Related Security Threats in Software Registries. DOI: 10.1109/sp46215.2023.10179332
* Xu, Z., & Zhang, X. (2010). dPAN: Distributed Package Management Network.

<span id="overall-description"></span>
== 2. Overall Description ==

<span id="product-perspective"></span>
=== 2.1 Product Perspective ===

ModMan is a core component of the Logos Microkernel ecosystem, responsible for managing the discovery, distribution, and lifecycle of all system modules. It operates in a fully decentralized manner without central repositories, utilizing peer-to-peer networking for module distribution and the PDMS (as a persistent decentralized metadata store) for metadata management.

Key characteristics:
* Fully decentralized architecture with no central repositories
* Content-based routing rather than location-based addressing
* Semantic-based peer clustering for efficient content discovery
* Distributed caching for improved performance and availability
* Support for both push (notifications) and pull (search) operations

The system interfaces with:
* Logos Microkernel: For module deployment and runtime management
* PDMS: For handling dependency resolution and versioning metadata
* Codex: For file-sharing and content delivery
* Other ModMan instances: For peer-to-peer module distribution

<span id="product-functions"></span>
=== 2.2 Product Functions ===

The major functions of ModMan include:

# Module Discovery
#* Search for available modules
#* Browse module categories
#* View module details and metadata
# Module Installation
#* Download modules from peers
#* Verify module integrity and authenticity
#* Install modules into the system
# Module Updates
#* Check for available updates
#* Download and verify updates
#* Apply updates safely
# Dependency Management
#* Resolve module dependencies
#* Handle version constraints
#* Maintain dependency graph consistency
# Multi-Architecture Support
#* Manage modules for different architectures
#* Select appropriate binaries for target system
#* Handle cross-architecture dependencies
# Security
#* Verify module signatures
#* Validate supply chain integrity
#* Protect against various attack vectors

<span id="user-classes-and-characteristics"></span>
=== 2.3 User Classes and Characteristics ===

# End Users
#* Primary users of the application market interface
#* May have varying levels of technical expertise
#* Main concerns: ease of use, reliability, security
# System Administrators
#* Manage module deployments across systems
#* High technical expertise
#* Main concerns: security, control, automation
# Module Developers
#* Create and publish modules
#* High technical expertise
#* Main concerns: deployment process, versioning, dependency specification
# Security Auditors
#* Review system security
#* High technical expertise in security
#* Main concerns: security features, audit trails

<span id="operating-environment"></span>
=== 2.4 Operating Environment ===

* Must operate on any system running the Logos Microkernel
* Must support multiple hardware architectures
* Must operate in a decentralized network environment
* Must function in potentially hostile network conditions
* Must handle intermittent connectivity

<span id="design-and-implementation-constraints"></span>
=== 2.5 Design and Implementation Constraints ===

* Must be implemented in a memory-safe language
* Must follow Logos Microkernel module specifications
* Must use PDMS for metadata storage
* Must use Codex for module storage
* Must implement P2P protocols for module distribution
* Must support offline operation when needed
* Must be resistant to various network attacks
* Must handle limited resource environments
* Must store architecture-specific binaries separately
* Must validate package integrity through checksums
* Must track package provenance and maintain audit trail

<span id="user-documentation"></span>
=== 2.6 User Documentation ===

The following documentation will be provided:
* User manual for the application market interface
* Administrator guide for system deployment
* Developer guide for module creation and publishing
* Security guide for system hardening
* API documentation for programmatic interaction

<span id="assumptions-and-dependencies"></span>
=== 2.7 Assumptions and Dependencies ===

Assumptions:
* PDMS system is available and functional
* Codex system is available and functional
* Logos Microkernel provides necessary module management interfaces
* Network connectivity is available for P2P operations
* Sufficient storage is available for module caching

Dependencies:
* Logos Microkernel
* PDMS
* Codex
* Anonymous DHT
* Cryptographic libraries
* P2P networking stack

<span id="external-interface-requirements"></span>
== 3. External Interface Requirements ==

<span id="user-interfaces"></span>
=== 3.1 User Interfaces ===

The system SHOULD provide:
1. Microkernel IPC Interface - For loading / unloading modules

The system SHOULD provide:
1. Command Line Interface (CLI) - For system administration and automation - Full access to all system functions - Scriptable operations

<ol start="2" style="list-style-type: decimal;">
<li>Application Market Interface
<ul>
<li>Graphical interface for module browsing</li>
<li>Search and filter capabilities</li>
<li>Module details and metadata display</li>
<li>Installation and update management</li></ul>
</li></ol>

<span id="hardware-interfaces"></span>
=== 3.2 Hardware Interfaces ===

The system MUST:
* Support multiple CPU architectures
* Adapt to available storage capacity
* Operate within memory constraints
* Handle various network interfaces

<span id="software-interfaces"></span>
=== 3.3 Software Interfaces ===

# Logos Microkernel Interface
#* Module deployment API
#* Runtime management
#* System status monitoring
# PDMS Interface
#* Metadata storage and retrieval
#* Dependency information
#* Version tracking
# Codex Interface
#* Content-addressed module storage and retrieval
#* Chunk-based file transfer for efficient distribution
#* Distributed caching and replication
#* Content verification and integrity checking
#* Deduplication of module content
# P2P Network Interface
#* May need customized DHT for package management
#* Optimized lookup response times (<10s target)
#* Support for multiple values per key
#* NAT traversal capabilities (Provided by a Networking Module)
#* Piece-based downloading for large packages
#* Fallback to server downloads
#* Chain of trust through cryptographic hashes

<span id="communications-interfaces"></span>
=== 3.4 Communications Interfaces ===

# P2P Protocol
#* Peer discovery and routing
#* Content addressing
#* NAT traversal
# Security Protocol
#* Authentication
#* Encryption
#* Signature verification

<span id="system-features"></span>
== 4. System Features ==

<span id="module-discovery-and-distribution"></span>
=== 4.1 Module Discovery and Distribution ===

<span id="description-and-priority"></span>
==== 4.1.1 Description and Priority ====

Module discovery enables users to find, evaluate and obtain available modules through a P2P network. (Priority: High)

<span id="functional-requirements"></span>
==== 4.1.2 Functional Requirements ====

MDD-001: Module Search Capabilities - The system MUST implement basic search capabilities:
* Search by module name
* Search by functionality
* Search by metadata tags
* Filter by architecture compatibility

MDD-002: Module Browsing Interface - The system MUST provide browsing functionality:
* List available modules
* Filter by categories
* Sort by various criteria
* Show module popularity metrics

MDD-003: Metadata Management System - The system MUST handle module metadata:
* Show module details
* Display version information
* List dependencies
* Show compatibility information
* Display module size and download statistics

MDD-004: P2P Distribution Protocol - The system MUST implement P2P distribution:
* Use DHT for module discovery
* Support piece-based downloads for large modules
* Fallback to server downloads when needed
* Verify module integrity via cryptographic hashes
* Cache frequently requested modules
* Implement LRU cache eviction for obsolete modules

<span id="module-installation-and-management"></span>
=== 4.2 Module Installation and Management ===

<span id="description-and-priority-1"></span>
==== 4.2.1 Description and Priority ====

Secure installation and management of modules from the P2P network. (Priority: High)

<span id="functional-requirements-1"></span>
==== 4.2.2 Functional Requirements ====

MIM-001: Module Download Protocol - The system MUST implement secure downloads:
* Fetch from multiple peers
* Verify integrity during transfer
* Resume interrupted downloads
* Support platform-specific assets
* Validate checksums during download

MIM-002: Module Verification System - The system MUST verify module authenticity:
* Check cryptographic signatures
* Validate supply chain
* Verify integrity
* Validate module spec format
* Check lockfile consistency

MIM-003: Module Installation Process - The system MUST handle installation:
* Deploy to correct system location
* Configure module
* Update system state
* Support project and global scope

MIM-004: Module Management System - The system MUST manage module lifecycle:
* Track installed modules
* Maintain lockfiles for reproducibility
* Support module uninstallation
* Handle module updates
* Clean obsolete files

<span id="module-updates-and-versioning"></span>
=== 4.3 Module Updates and Versioning ===

<span id="description-and-priority-2"></span>
==== 4.3.1 Description and Priority ====

Manage module updates and versions securely. (Priority: High)

<span id="functional-requirements-2"></span>
==== 4.3.2 Functional Requirements ====

MUV-001: Update Detection System - The system MUST implement update detection:
* Check for available updates
* Compare versions
* Evaluate compatibility
* Support latest version resolution
* Track version history

MUV-002: Update Process Management - The system MUST handle updates securely:
* Download updates securely
* Verify update integrity
* Handle failed updates
* Rollback capability
* Maintain lockfile consistency

MUV-003: Version Control System - The system MUST manage versions:
* Support semantic versioning
* Handle version constraints
* Track version metadata
* Support version pinning
* Maintain version history

<span id="dependency-resolution"></span>
=== 4.4 Dependency Resolution ===

<span id="description-and-priority-3"></span>
==== 4.4.1 Description and Priority ====

Manage module dependencies effectively. (Priority: High)

<span id="functional-requirements-3"></span>
==== 4.4.2 Functional Requirements ====

MDR-001: Dependency Resolution Engine - The system MUST implement dependency resolution:
* Parse dependency specifications
* Resolve version constraints
* Handle circular dependencies
* Detect conflicts

MDR-002: Dependency Management System - The system MUST manage dependencies:
* Track installed dependencies
* Remove unused dependencies
* Update dependency graph

<span id="multi-architecture-support"></span>
=== 4.5 Multi-Architecture Support ===

<span id="description-and-priority-4"></span>
==== 4.5.1 Description and Priority ====

Support multiple hardware architectures. (Priority: High)

<span id="functional-requirements-4"></span>
==== 4.5.2 Functional Requirements ====

MAS-001: Architecture Detection and Compatibility - The system MUST manage architecture support:
* Detect system architecture
* Select compatible modules
* Handle multi-arch dependencies

MAS-002: Binary Asset Management - The system MUST handle architecture-specific binaries:
* Store architecture-specific binaries
* Select correct binary for system
* Handle cross-compilation artifacts

<span id="security-features"></span>
=== 4.6 Security Features ===

<span id="description-and-priority-5"></span>
==== 4.6.1 Description and Priority ====

Ensure system and module security in a decentralized environment through selective trust delegation and secure package verification, assuming an untrusted repository. (Priority: High)

<span id="functional-requirements-5"></span>
==== 4.6.2 Functional Requirements ====

MSF-001: Trust Management System - The system MUST implement trust management:
* Allow trust delegation for specific packages or package patterns only
* Support hierarchical trust relationships
* Enable fine-grained trust revocation
* Prevent trust escalation attacks
* SHOULD support negative trust assertions (package blacklisting)

MSF-002: Package Verification System - The system MUST verify packages:
* Verify package signatures before installation
* Validate package metadata independently of packages
* Check package metadata matches signed metadata
* Prevent package metadata tampering
* Support multiple package formats
* Enable secure dependency resolution

MSF-003: Authentication System - The system MUST authenticate entities:
* Verify module signatures
* Validate developer identities
* Check certificate chains
* Support decentralized certification

MSF-004: Supply Chain Security - The system MUST secure supply chain:
* Track module provenance
* SHOULD verify build reproducibility
* MUST detect tampering
* SHOULD implement reputation-based trust
* SHOULD support peer reputation scoring

MSF-005: Network Security Protocol - The system MUST secure communications:
* Encrypt communications
* Prevent MitM attacks
* Handle malicious peers
* Support peer blacklisting
* Implement trust revocation

MSF-006: Device Security System - The system MUST secure devices:
* Handle heterogeneous device capabilities
* Protect resource-constrained devices
* Support secure offline operation
* Implement secure peer discovery

<span id="other-nonfunctional-requirements"></span>
== 5. Other Nonfunctional Requirements ==

<span id="performance-requirements"></span>
=== 5.1 Performance Requirements ===

# Response Time
#* DHT lookups MUST complete within 10 seconds for optimal user experience
#* Module search MUST complete within 2 seconds
#* Installation MUST show progress indicators and download speeds
#* Downloads MUST utilize available bandwidth effectively through multi-peer transfers
#* Metadata dissemination MUST be timely and efficient
#* MUST support concurrent downloads (10+ default)
#* MUST provide sequential download feedback for user monitoring
# Scalability
#* MUST handle basic module repository (1,000+ packages)
#* MUST support basic concurrent operations
#* SHOULD scale to large network sizes (20,000+ packages)
#* SHOULD handle frequent updates efficiently (1.5% daily)
#* MUST optimize for small package sizes (majority < 512KB)
#* MUST handle basic NAT traversal
#* SHOULD maintain long-lived peer connections (5+ hours)
#* MUST support piece-based downloads for large files (>2.5MB)
# Caching and Storage
#* MUST utilize Codex for basic content storage
#* MUST use content-addressed storage for basic deduplication
#* MUST support basic chunk-based transfers
#* SHOULD implement advanced cache management based on popularity
#* SHOULD implement delta storage optimization
#* MUST implement basic cache eviction
#* SHOULD optimize storage for small packages
#* MUST handle basic multi-architecture storage
#* MUST support basic piece-wise verification
#* SHOULD support configurable cache limits

<span id="security-requirements"></span>
=== 5.2 Security Requirements ===

# Package Verification Requirements
#* MUST use signature wrappers with timestamps to prevent replay attacks
#* MUST use self-certifying path names for package verification
#* MUST support customized repository views per client
#* MUST verify package metadata before downloading packages
#* MUST prevent metadata tampering through cryptographic verification
#* MUST validate all repository communications
# Cryptographic Requirements
#* MUST use strong cryptographic primitives
#* SHOULD implement perfect forward secrecy
#* MUST secure all network communications
#* MUST verify module integrity via cryptographic hashes
#* MUST validate digital signatures on modules
#* SHOULD support multiple signing keys per module
#* MUST separate user and module signing keys
# Dependency Resolution Security
#* MUST verify dependencies through cryptographic validation
#* MUST prevent dependency-based attacks
#* MUST validate dependency metadata independently
#* MUST detect malicious dependency specifications
#* MUST prevent dependency confusion attacks
#* MUST handle missing dependencies securely
# Access Control
#* MUST implement principle of least privilege
#* MUST control module installation permissions
#* MUST protect sensitive operations
#* MUST enforce module isolation
#* MUST prevent unauthorized privilege escalation
#* MUST validate module source authenticity
#* MUST enforce key usage restrictions
# Audit
#* MUST log security-relevant events
#* MUST track module provenance
#* MUST maintain audit trails
#* MUST record module installation history
#* MUST track certificate delegation chains
#* MUST record key revocations and replacements
#* MUST maintain distributed ledger of events
# Trust Management
#* MUST verify initial module trust
#* MUST maintain trust continuity during updates
#* MUST handle certificate expiration
#* MUST support basic certificate revocation
#* SHOULD implement advanced reputation tracking
#* SHOULD support distributed consensus validation
#* MUST handle basic malicious registry scenarios
# Supply Chain Security
#* SHOULD verify build reproducibility
#* MUST validate module dependencies
#* MUST detect basic tampering
#* MUST prevent unauthorized modifications
#* MUST handle basic compromised registry scenarios
#* SHOULD support multiple registry mirrors
#* SHOULD implement advanced consensus validation

<span id="software-quality-attributes"></span>
=== 5.3 Software Quality Attributes ===

# Reliability
#* MUST handle basic network failures
#* MUST maintain basic data integrity
#* MUST provide basic stable operation
#* SHOULD handle advanced peer capabilities
#* MUST support basic network connectivity
# Availability
#* MUST provide basic offline operation
#* MUST handle basic peer disconnections
#* SHOULD provide advanced offline capabilities
#* SHOULD support advanced caching strategies
#* SHOULD implement advanced routing optimizations
# Maintainability
#* MUST be modular
#* MUST provide basic documentation
#* MUST support basic testing
#* SHOULD support protocol evolution
#* SHOULD handle advanced version compatibility
# Portability
#* MUST support core architectures (x86_64, ARM)
#* MUST be platform-independent
#* MUST handle basic environments
#* SHOULD support advanced device capabilities
#* SHOULD handle advanced resource constraints

<span id="business-rules"></span>
=== 5.4 Business Rules ===

# Module Publishing
#* MUST verify basic developer identity
#* MUST validate basic module metadata
#* SHOULD support advanced identity verification
#* SHOULD support advanced metadata validation
# Version Management
#* MUST follow semantic versioning
#* MUST maintain basic version history
#* SHOULD support advanced version tracking
#* SHOULD handle advanced deprecation scenarios

<span id="other-requirements"></span>
== 6. Other Requirements ==

# Legal Requirements
#* MUST comply with open source licenses
# Internationalization
#* MUST support basic UTF-8 encoding
#* SHOULD support multiple languages
#* SHOULD handle advanced character sets
#* SHOULD implement locale-specific features

<span id="appendix-a-glossary"></span>
== Appendix A: Glossary ==

* ModMan: Logos P2P Module Package Manager
* PDMS: Persistent Decentralized Metadata Store
* Codex: Content-addressed distributed storage system for secure and efficient module storage and distribution
* DHT: Distributed Hash Table
* P2P: Peer-to-Peer
* MVP: Minimum Viable Product

<span id="appendix-b-analysis-models"></span>
== Appendix B: Analysis Models ==

TBD: Will include:
* System architecture diagrams
* Data flow models
* State transition diagrams
* Security threat models

<span id="appendix-c-to-be-determined-list"></span>
== Appendix C: To Be Determined List ==

# Specific cryptographic algorithms and key sizes
# Network protocol details
# Performance benchmarks
# Detailed security audit requirements
# Specific module metadata schema