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Add A high-level specification document that outlines the module architectural vision

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# WebAssembly Cryptography Module Enhancement Specification
## 1. Executive Summary
This document outlines the architectural vision for extending the WebAssembly Cryptography Module with a Command Line Interface (CLI), Rhai scripting capabilities, and messaging system integration. These enhancements will transform the module from a browser-focused library into a versatile cryptographic toolkit that can operate across multiple contexts while maintaining its existing WebAssembly functionality.
## 2. System Overview
### 2.1 Current System
The existing WebAssembly Cryptography Module provides:
- Secure key management with encrypted storage
- Asymmetric cryptography operations (ECDSA)
- Symmetric encryption (ChaCha20Poly1305)
- Ethereum wallet functionality
- Browser integration via WebAssembly
### 2.2 Enhanced System Vision
The enhanced system will extend these capabilities to:
- Provide command-line access to all cryptographic functions
- Enable automation through scripting
- Support remote operation via messaging
- Maintain WebAssembly compatibility
## 3. Architecture Overview
### 3.1 Component Architecture
```
┌─────────────────────────────────────────────────────────────┐
│ │
│ User Interaction Layer │
│ │
├───────────────────┐ ┌─────────────────┐ │
│ │ │ │ │
│ WebAssembly UI │ │ CLI Interface │ │
│ │ │ │ │
└─────────┬─────────┘ └────────┬────────┘ │
│ │ │
└────────────────┐ ┌─────────────────┘ │
│ │ │
▼ ▼ │
┌─────────────────────────────────────────────────────────────┤
│ │
│ Cryptographic Core API │
│ │
├─────────────────────────────────────────────────────────────┤
│ │
│ ┌─────────────────┐ ┌────────────────┐ ┌───────────────┐ │
│ │ │ │ │ │ │ │
│ │ Key Management │ │ Cryptographic │ │ Ethereum │ │
│ │ │ │ Operations │ │ Wallet │ │
│ │ │ │ │ │ │ │
│ └─────────────────┘ └────────────────┘ └───────────────┘ │
│ │
└─────────────────────────────────────────────────────────────┘
▲
│
┌───────────┴───────────┐
│ │
┌─────────┴─────────┐ │
│ │ │
│ Rhai Scripting │◄────────────┘
│ Engine │
│ │◄────────────┐
└─────────┬─────────┘ │
│ │
▼ │
┌─────────────────────┐ │
│ │ │
│ Messaging System │───────────┘
│ │
│ │
└─────────────────────┘
```
### 3.2 Logical Architecture
```mermaid
graph TD
User[User] --> CLI[CLI Interface]
User --> WebUI[Web UI]
CLI --> Core[Cryptographic Core]
WebUI --> WASM[WebAssembly Module]
WASM --> Core
CLI --> ScriptEngine[Rhai Script Engine]
ScriptEngine --> Core
CLI --> Messaging[Messaging System]
Messaging --> ScriptEngine
RemoteSystems[Remote Systems] --> Messaging
subgraph "Core Functionality"
Core --> KeyMgmt[Key Management]
Core --> CryptoOps[Cryptographic Operations]
Core --> EthWallet[Ethereum Wallet]
Core --> Storage[Secure Storage]
end
```
## 4. Component Specifications
### 4.1 Command Line Interface (CLI)
#### 4.1.1 Purpose
Provide a command-line interface to all cryptographic functions, enabling scripting, automation, and integration with other tools.
#### 4.1.2 Key Features
- Command categories for different functional areas
- Interactive and non-interactive modes
- Configuration management
- Comprehensive help system
#### 4.1.3 Command Structure
```
crypto-cli [OPTIONS] <COMMAND>
COMMANDS:
key Key management operations
crypto Cryptographic operations
ethereum Ethereum wallet operations
script Execute Rhai scripts
listen Listen for scripts via messaging
shell Start interactive shell
help Print help information
```
### 4.2 Rhai Scripting Engine
#### 4.2.1 Purpose
Enable automation of cryptographic operations through a secure scripting language.
#### 4.2.2 Key Features
- Access to all cryptographic functions
- Sandboxed execution environment
- Script validation and error handling
- Support for conditional logic and data processing
#### 4.2.3 Script Flow Example
```mermaid
sequenceDiagram
participant User
participant CLI
participant ScriptEngine
participant CryptoCore
User->>CLI: Execute script
CLI->>ScriptEngine: Load and validate script
ScriptEngine->>CryptoCore: Create key space
CryptoCore-->>ScriptEngine: Success
ScriptEngine->>CryptoCore: Create keypair
CryptoCore-->>ScriptEngine: Success
ScriptEngine->>CryptoCore: Sign message
CryptoCore-->>ScriptEngine: Signature
ScriptEngine-->>CLI: Script result
CLI-->>User: Display result
```
### 4.3 Messaging System
#### 4.3.1 Purpose
Enable remote execution of cryptographic operations through a secure messaging system.
#### 4.3.2 Options
**Option A: Mycelium**
- Peer-to-peer architecture
- End-to-end encryption by default
- NAT traversal capabilities
- Rust native implementation
**Option B: NATS**
- Client-server architecture
- High performance and scalability
- Mature ecosystem
- Extensive documentation
#### 4.3.3 Messaging Flow
```mermaid
sequenceDiagram
participant RemoteSystem
participant MessagingSystem
participant CLI
participant ScriptEngine
participant CryptoCore
RemoteSystem->>MessagingSystem: Send script
MessagingSystem->>CLI: Deliver script
CLI->>ScriptEngine: Execute script
ScriptEngine->>CryptoCore: Perform operations
CryptoCore-->>ScriptEngine: Operation results
ScriptEngine-->>CLI: Script result
CLI->>MessagingSystem: Send result
MessagingSystem->>RemoteSystem: Deliver result
```
## 5. Data Flows
### 5.1 CLI Operation Flow
```mermaid
flowchart TD
A[User Input] --> B{Command Type}
B -->|Key Management| C[Process Key Command]
B -->|Cryptographic| D[Process Crypto Command]
B -->|Ethereum| E[Process Ethereum Command]
B -->|Script| F[Process Script Command]
B -->|Messaging| G[Process Messaging Command]
C --> H[Execute Core API]
D --> H
E --> H
F --> I[Execute Script Engine]
I --> H
G --> J[Execute Messaging System]
J --> I
H --> K[Return Result]
K --> L[Format Output]
L --> M[Display to User]
```
### 5.2 Script Execution Flow
```mermaid
flowchart TD
A[Script Input] --> B[Parse Script]
B --> C[Validate Script]
C --> D{Valid?}
D -->|No| E[Report Error]
D -->|Yes| F[Initialize Sandbox]
F --> G[Execute Script]
G --> H{Error?}
H -->|Yes| I[Handle Error]
H -->|No| J[Process Result]
I --> K[Return Error]
J --> L[Return Result]
```
### 5.3 Messaging System Flow
```mermaid
flowchart TD
A[Remote System] --> B[Send Message]
B --> C[Messaging Transport]
C --> D[Receive Message]
D --> E[Validate Message]
E --> F{Valid?}
F -->|No| G[Reject Message]
F -->|Yes| H[Extract Script]
H --> I[Execute Script]
I --> J[Generate Result]
J --> K[Format Response]
K --> L[Send Response]
L --> M[Messaging Transport]
M --> N[Remote System]
```
## 6. Security Architecture
### 6.1 Security Layers
```mermaid
flowchart TD
A[User/System Input] --> B[Input Validation]
B --> C[Authentication]
C --> D[Authorization]
D --> E[Sandboxed Execution]
E --> F[Cryptographic Operations]
F --> G[Secure Storage]
H[Security Monitoring] --> B
H --> C
H --> D
H --> E
H --> F
H --> G
```
### 6.2 Key Security Measures
- **Input Validation**: All inputs are validated before processing
- **Authentication**: Users and systems must authenticate before accessing sensitive operations
- **Authorization**: Access to operations is controlled based on authentication
- **Sandboxing**: Scripts execute in a restricted environment
- **Encryption**: All sensitive data is encrypted at rest and in transit
- **Secure Storage**: Keys are stored in encrypted form
- **Monitoring**: Security events are logged and monitored
## 7. Integration Points
### 7.1 WebAssembly Integration
The enhanced system will maintain compatibility with the existing WebAssembly module, allowing browser-based applications to continue using the cryptographic functionality.
### 7.2 CLI Integration
The CLI will integrate with the operating system's command-line environment, enabling integration with shell scripts and other command-line tools.
### 7.3 Messaging Integration
The messaging system will provide integration points for remote systems to send scripts and receive results, enabling distributed cryptographic operations.
## 8. Deployment Architecture
### 8.1 Standalone Deployment
```mermaid
flowchart TD
A[User] --> B[CLI Application]
B --> C[Local File System]
B --> D[Local Cryptographic Operations]
```
### 8.2 Networked Deployment
```mermaid
flowchart TD
A[User] --> B[CLI Application]
B --> C[Local File System]
B --> D[Local Cryptographic Operations]
B <--> E[Messaging System]
F[Remote System] <--> E
G[Remote System] <--> E
```
### 8.3 Web Deployment
```mermaid
flowchart TD
A[User] --> B[Web Browser]
B --> C[WebAssembly Module]
C --> D[Browser Storage]
C --> E[Browser Cryptographic Operations]
```
## 9. Decision Matrix: Mycelium vs. NATS
| Criteria | Mycelium | NATS |
|----------|----------|------|
| **Architecture** | Peer-to-peer | Client-server |
| **Decentralization** | High | Low |
| **Security** | End-to-end encryption by default | TLS support |
| **NAT Traversal** | Built-in | Requires configuration |
| **Maturity** | Newer project | Established project |
| **Documentation** | Limited | Extensive |
| **Performance** | Good for P2P scenarios | Optimized for high throughput |
| **Deployment Complexity** | No central server needed | Requires server setup |
| **Language Support** | Rust native | Multiple language clients |
## 10. Implementation Roadmap
### 10.1 Milestones
1. **CLI Core Implementation Complete**
- Basic CLI structure implemented
- All cryptographic functions accessible via CLI
- Interactive shell functional
2. **Rhai Scripting Integration Complete**
- Script execution functional
- All cryptographic functions accessible via scripts
- Sandboxing implemented
3. **Messaging System Integration Complete**
- Selected messaging system integrated
- Remote script execution functional
- Security measures implemented
4. **Project Complete**
- All tests passing
- Documentation complete
- Release candidate ready
## 11. Conclusion
The enhanced WebAssembly Cryptography Module will provide a versatile cryptographic toolkit that can operate across multiple contexts, from browser applications to command-line tools to distributed systems. By adding CLI capabilities, Rhai scripting, and messaging system integration, the module will support a wider range of use cases while maintaining its existing WebAssembly functionality.
The choice between Mycelium and NATS for the messaging system will depend on specific requirements for decentralization, security, and deployment complexity. Both options provide viable paths forward, with different trade-offs in terms of architecture and capabilities.

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This project provides a WebAssembly module written in Rust that offers cryptographic functionality for web applications. This project provides a WebAssembly module written in Rust that offers cryptographic functionality for web applications.
## Planned Enhancements
We are planning significant enhancements to this module, including:
- Command Line Interface (CLI)
- Rhai scripting capabilities
- Messaging system integration (Mycelium or NATS)
For details, see the [Enhancement Specification](ENHANCEMENT_SPEC.md).
## Features ## Features
- **Key Space Management** - **Key Space Management**