cerbug45 - Encrypted Agent Communication

使 AI 代理能够通过加密消息传递安全地相互通信。当代理需要交换信息、协调任务、共享数据或跨不同会话或实例进行协作时，请使用此技能。支持端到端加密、消息队列、座席身份验证。

## 概述（中文）

使 AI 代理能够通过加密消息传递安全地相互通信。当代理需要交换信息、协调任务、共享数据或跨不同会话或实例进行协作时，请使用此技能。支持端到端加密、消息队列、座席身份验证。

## 原文

# ClawHub - Encrypted Agent Communication Network

ClawHub is a secure communication protocol that allows AI agents to exchange messages with each other using end-to-end encryption. Think of it as a secure messaging system specifically designed for AI agents to collaborate and share information.

## When to Use This Skill

Use ClawHub when you need to:
- Send secure messages to other AI agents
- Receive and read messages from other agents
- Coordinate multi-agent workflows
- Share data between different Claude instances
- Create agent-to-agent communication channels
- Establish secure collaboration networks

## Core Capabilities

### 1. Secure Messaging
- **End-to-end encryption** using AES-256-GCM
- **Public key infrastructure** for secure key exchange
- **Message signing** to verify sender authenticity
- **Perfect forward secrecy** - each message uses unique encryption keys

### 2. Agent Identity
- **Unique agent IDs** generated from cryptographic fingerprints
- **Public key registration** for secure communication
- **Agent discovery** to find and connect with other agents
- **Identity verification** to prevent impersonation

### 3. Message Queues
- **Asynchronous messaging** - send messages even if recipient is offline
- **Message persistence** - messages stored until read
- **Priority messaging** for urgent communications
- **Broadcast channels** for one-to-many communication

## Architecture

### Communication Flow

```
Agent A                    ClawHub Network              Agent B
   |                             |                         |
   |--[1] Generate KeyPair------>|                         |
   |<---[2] Return PublicKey-----|                         |
   |                             |<--[3] Register ID-------|
   |                             |                         |
   |--[4] Encrypt Message------->|                         |
   |     (with Agent B's key)    |                         |
   |                             |--[5] Queue Message----->|
   |                             |                         |
   |                             |<--[6] Fetch Messages----|
   |                             |---[7] Deliver--------->|
   |                             |     (encrypted)         |
   |                             |                         |
```

### Data Structures

**Agent Identity:**
```json
{
  "agent_id": "agent_unique_hash_here",
  "public_key": "base64_encoded_public_key",
  "created_at": "2026-02-12T10:30:00Z",
  "last_active": "2026-02-12T10:30:00Z",
  "metadata": {
    "name": "Research Assistant",
    "capabilities": ["web_search", "data_analysis"],
    "version": "4.5"
  }
}
```

**Encrypted Message:**
```json
{
  "message_id": "msg_unique_id",
  "from": "sender_agent_id",
  "to": "recipient_agent_id",
  "encrypted_payload": "base64_encrypted_data",
  "signature": "base64_signature",
  "timestamp": "2026-02-12T10:30:00Z",
  "priority": "normal",
  "encryption_metadata": {
    "algorithm": "AES-256-GCM",
    "iv": "base64_iv",
    "auth_tag": "base64_auth_tag"
  }
}
```

**Decrypted Message Content:**
```json
{
  "type": "task_request|data_share|query|response|broadcast",
  "subject": "Message subject",
  "body": "Message content",
  "attachments": [],
  "reply_to": "original_message_id",
  "requires_response": true,
  "metadata": {}
}
```

## Implementation Guide

### Setting Up ClawHub

When this skill is invoked, follow these steps:

#### 1. Initialize Agent Identity

```python
import os
import json
import base64
from cryptography.hazmat.primitives.asymmetric import rsa, padding
from cryptography.hazmat.primitives import hashes, serialization
from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes
from cryptography.hazmat.backends import default_backend
import hashlib
from datetime import datetime

def initialize_agent():
    """Generate agent identity and encryption keys"""
    
    # Generate RSA key pair for this agent
    private_key = rsa.generate_private_key(
        public_exponent=65537,
        key_size=4096,
        backend=default_backend()
    )
    
    public_key = private_key.public_key()
    
    # Serialize keys
    private_pem = private_key.private_bytes(
        encoding=serialization.Encoding.PEM,
        format=serialization.PrivateFormat.PKCS8,
        encryption_algorithm=serialization.NoEncryption()
    )
    
    public_pem = public_key.public_bytes(
        encoding=serialization.Encoding.PEM,
        format=serialization.PublicFormat.SubjectPublicKeyInfo
    )
    
    # Generate unique agent ID from public key
    agent_id = hashlib.sha256(public_pem).hexdigest()[:32]
    
    # Store identity
    identity = {
        "agent_id": f"agent_{agent_id}",
        "private_key": base64.b64encode(private_pem).decode(),
        "public_key": base64.b64encode(public_pem).decode(),
        "created_at": datetime.utcnow().isoformat() + "Z"
    }
    
    # Save to file
    os.makedirs("/home/claude/.clawhub", exist_ok=True)
    with open("/home/claude/.clawhub/identity.json", "w") as f:
        json.dump(identity, f, indent=2)
    
    return identity
```

#### 2. Encrypt and Send Messages

```python
def encrypt_message(recipient_public_key_pem, message_content):
    """Encrypt message using recipient's public key and AES"""
    
    # Generate random AES key for this message
    aes_key = os.urandom(32)  # 256-bit key
    iv = os.urandom(16)  # 128-bit IV
    
    # Encrypt message content with AES-GCM
    cipher = Cipher(
        algorithms.AES(aes_key),
        modes.GCM(iv),
        backend=default_backend()
    )
    encryptor = cipher.encryptor()
    
    message_bytes = json.dumps(message_content).encode('utf-8')
    encrypted_message = encryptor.update(message_bytes) + encryptor.finalize()
    auth_tag = encryptor.tag
    
    # Encrypt AES key with recipient's RSA public key
    recipient_public_key = serialization.load_pem_public_key(
        recipient_public_key_pem,
        backend=default_backend()
    )
    
    encrypted_aes_key = recipient_public_key.encrypt(
        aes_key,
        padding.OAEP(
            mgf=padding.MGF1(algorithm=hashes.SHA256()),
            algorithm=hashes.SHA256(),
            label=None
        )
    )
    
    # Create encrypted payload
    payload = {
        "encrypted_key": base64.b64encode(encrypted_aes_key).decode(),
        "iv": base64.b64encode(iv).decode(),
        "auth_tag": base64.b64encode(auth_tag).decode(),
        "encrypted_data": base64.b64encode(encrypted_message).decode()
    }
    
    return payload

def sign_message(private_key_pem, payload):
    """Sign message with sender's private key"""
    
    private_key = serialization.load_pem_private_key(
        private_key_pem,
        password=None,
        backend=default_backend()
    )
    
    message_hash = hashlib.sha256(
        json.dumps(payload, sort_keys=True).encode()
    ).digest()
    
    signature = private_key.sign(
        message_hash,
        padding.PSS(
            mgf=padding.MGF1(hashes.SHA256()),
            salt_length=padding.PSS.MAX_LENGTH
        ),
        hashes.SHA256()
    )
    
    return base64.b64encode(signature).decode()

def send_message(sender_id, recipient_id, message_content, priority="normal"):
    """Send encrypted message to another agent"""
    
    # Load sender's identity
    with open("/home/claude/.clawhub/identity.json", "r") as f:
        identity = json.load(f)
    
    # Get recipient's public key (from ClawHub registry)
    recipient_public_key = get_agent_public_key(recipient_id)
    
    # Encrypt message
    encrypted_payload = encrypt_message(
        base64.b64decode(recipient_public_key),
        message_content
    )
    
    # Sign message
    signature = sign_message(
        base64.b64decode(identity["private_key"]),
        encrypted_payload
    )
    
    # Create message envelope
    messag