Modman/Requirements

Software Requirements Specification

for

Logos P2P Module Package Manager (ModMan)

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

1. Introduction

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.

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

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.

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

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.

2. Overall Description

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

2.2 Product Functions

The major functions of ModMan include:

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

2.3 User Classes and Characteristics

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

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

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

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

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

3. External Interface Requirements

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

2. Application Market Interface
   • Graphical interface for module browsing
   • Search and filter capabilities
   • Module details and metadata display
   • Installation and update management

3.2 Hardware Interfaces

The system MUST:

• Support multiple CPU architectures
• Adapt to available storage capacity
• Operate within memory constraints
• Handle various network interfaces

3.3 Software Interfaces

1. Logos Microkernel Interface
   • Module deployment API
   • Runtime management
   • System status monitoring
2. PDMS Interface
   • Metadata storage and retrieval
   • Dependency information
   • Version tracking
3. 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
4. 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

3.4 Communications Interfaces

1. P2P Protocol
   • Peer discovery and routing
   • Content addressing
   • NAT traversal
2. Security Protocol
   • Authentication
   • Encryption
   • Signature verification

4. System Features

4.1 Module Discovery and Distribution

4.1.1 Description and Priority

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

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

4.2 Module Installation and Management

4.2.1 Description and Priority

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

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

4.3 Module Updates and Versioning

4.3.1 Description and Priority

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

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

4.4 Dependency Resolution

4.4.1 Description and Priority

Manage module dependencies effectively. (Priority: High)

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

4.5 Multi-Architecture Support

4.5.1 Description and Priority

Support multiple hardware architectures. (Priority: High)

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

4.6 Security Features

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)

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

5. Other Nonfunctional Requirements

5.1 Performance Requirements

1. 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
2. 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)
3. 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

5.2 Security Requirements

1. 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
2. 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
3. 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
4. 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
5. 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
6. 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
7. 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

5.3 Software Quality Attributes

1. 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
2. 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
3. Maintainability
   • MUST be modular
   • MUST provide basic documentation
   • MUST support basic testing
   • SHOULD support protocol evolution
   • SHOULD handle advanced version compatibility
4. 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

5.4 Business Rules

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

6. Other Requirements

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

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

Appendix B: Analysis Models

TBD: Will include:

• System architecture diagrams
• Data flow models
• State transition diagrams
• Security threat models

Appendix C: To Be Determined List

1. Specific cryptographic algorithms and key sizes
2. Network protocol details
3. Performance benchmarks
4. Detailed security audit requirements
5. Specific module metadata schema