spindlex 0.6.9

A modern, high-performance SSHv2 and SFTP client/server library

Quick Start • Documentation • Security • Contributing

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⚡ Overview

SpindleX is a modern SSH protocol implementation for Python 3.9+. It is designed for high-performance automation and secure file transfers, providing a clean alternative to legacy SSH libraries.

[!WARNING] Beta software. The 0.6.x line is stabilising the core protocol, transport, and SFTP layers. Review meta/SECURITY.md before deploying in production-facing workflows, pin exact versions, and audit your host key policy.

🔥 Key Features

• 🚀 High Performance: Optimized internal buffering (32KB chunks) for high-throughput SFTP and command execution.
• 🔄 Native Async: First-class asyncio support via AsyncSSHClient and AsyncSFTPClient.
• 🛡️ Security: Prioritizes modern primitives (Ed25519, AES-256-CTR) and disables legacy/weak ciphers.
• 🔗 Advanced Tunneling: Support for ProxyJump (bastion hosts) and TCP port forwarding.
• 📂 Recursive SFTP: Native support for recursive directory uploads and downloads.
• 🏷️ Fully Typed: Comprehensive type hints for IDE integration and static analysis.

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💎 Why SpindleX?

• 💼 Business Friendly: MIT Licensed. Permissive use for commercial and proprietary projects.
• 📖 Maintainable Code: Modular architecture designed for clarity and easier security auditing.
• 🛠️ Modern API: Clean, intuitive interface with consistent error handling and minimal dependencies.
• 🧊 Focused Scope: No support for insecure legacy protocols, resulting in a leaner and more secure codebase.

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🛠️ Tech Stack

Core Logic

Protocol

Concurrency

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🚀 Quick Start

Installation

# Using pip
pip install spindlex

# Using uv
uv pip install spindlex

💻 Usage Preview

Synchronous Example

from spindlex import SSHClient

with SSHClient() as client:
    client.get_host_keys().load()
    client.connect('example.com', username='admin')

    stdin, stdout, stderr = client.exec_command('uptime')
    print(f"Server Status: {stdout.read().decode().strip()}")

Asynchronous Example

import asyncio
from spindlex import AsyncSSHClient

async def main():
    async with AsyncSSHClient() as client:
        await client.connect('example.com', username='admin')
        stdin, stdout, stderr = await client.exec_command('df -h')
        print(await stdout.read())

asyncio.run(main())

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📊 Performance Benchmarks

SpindleX is optimized for high-throughput environments, significantly reducing protocol overhead compared to standard implementations.

Operation	SpindleX	Legacy Libraries	Improvement
Handshake	0.32s	0.85s	~2.6x
Bulk SFTP	45 MB/s	18 MB/s	~2.5x
Overhead	Low	High	🔥

[!TIP] Run the benchmark suite on your own hardware:
python scripts/benchmark_compare.py

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🛡️ Security

• Verification Enforced: Host key verification is mandatory by default.
• Log Sanitization: Credentials and sensitive data are automatically filtered from logs.
• Modern Defaults: Ed25519 and ECDSA preferred for key exchange.
• Full Policy: See meta/SECURITY.md for vulnerability reporting and security standards.

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🤝 Contributing

Contributions are welcome. See meta/CONTRIBUTING.md for guidelines.

Distributed under the MIT License. See LICENSE for more information.

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SpindleX Project © 2026 Stratza Labs