Feature: VmClient

Author: 1yam

pyproject.toml

@@ -28,6 +28,7 @@ dependencies = [
     "coincurve>=17.0.0; python_version>=\"3.11\"",
     "eth_abi>=4.0.0; python_version>=\"3.11\"",
     "eth_account>=0.4.0,<0.11.0",
+    "jwcrypto==1.5.6",
     "python-magic",
     "typer",
     "typing_extensions",

src/aleph/sdk/client/vmclient.py

@@ -0,0 +1,196 @@
+import datetime
+import json
+import logging
+import sys
+from typing import Any, Tuple
+
+import aiohttp
+from eth_account import Account
+from eth_account.messages import encode_defunct
+from jwcrypto import jwk
+from jwcrypto.jwa import JWA
+
+logger = logging.getLogger(__name__)
+
+
+class VmClient:
+    def __init__(self, account: Account, domain: str = ""):
+        self.account: Account = account
+        self.ephemeral_key = jwk.JWK.generate(kty="EC", crv="P-256")
+        self.expected_domain = domain
+        self.pubkey_payload = self._generate_pubkey_payload()
+        self.pubkey_signature_header = None
+        self.session = aiohttp.ClientSession()
+
+    def _generate_pubkey_payload(self):
+        return {
+            "pubkey": json.loads(self.ephemeral_key.export_public()),
+            "alg": "ECDSA",
+            "domain": self.expected_domain,
+            "address": self.account.address,
+            "expires": (
+                datetime.datetime.utcnow() + datetime.timedelta(days=1)
+            ).isoformat()
+            + "Z",
+        }
+
+    def _generate_pubkey_signature_header(self):
+        pubkey_payload = json.dumps(self.pubkey_payload).encode("utf-8").hex()
+        signable_message = encode_defunct(hexstr=pubkey_payload)
+        signed_message = self.account.sign_message(signable_message)
+        pubkey_signature = self.to_0x_hex(signed_message.signature)
+        return json.dumps(
+            {
+                "sender": self.account.address,
+                "payload": pubkey_payload,
+                "signature": pubkey_signature,
+                "content": {"domain": self.expected_domain},
+            }
+        )
+
+    @staticmethod
+    def to_0x_hex(b: bytes) -> str:
+        return "0x" + bytes.hex(b)
+
+    @staticmethod
+    def on_message(content):
+        try:
+            msg = json.loads(content)
+            fd = sys.stderr if msg["type"] == "stderr" else sys.stdout
+            logger.info(f"< {msg['message']}")
+        except Exception as e:
+            logger.error(f"Unable to parse content: {content}, Error: {str(e)}")
+
+    async def perform_operation(self, vm_id, operation):
+        if self.pubkey_signature_header is None:
+            self.pubkey_signature_header = self._generate_pubkey_signature_header()
+
+        hostname = f"https://{self.expected_domain}"
+        path = f"/control/machine/{vm_id}/{operation}"
+
+        payload = {
+            "time": datetime.datetime.utcnow().isoformat() + "Z",
+            "method": "POST",
+            "path": path,
+        }
+        payload_as_bytes = json.dumps(payload).encode("utf-8")
+        headers = {"X-SignedPubKey": self.pubkey_signature_header}
+        payload_signature = JWA.signing_alg("ES256").sign(
+            self.ephemeral_key, payload_as_bytes
+        )
+        headers["X-SignedOperation"] = json.dumps(
+            {
+                "payload": payload_as_bytes.hex(),
+                "signature": payload_signature.hex(),
+            }
+        )
+
+        url = f"{hostname}{path}"
+
+        try:
+            async with self.session.post(url, headers=headers) as response:
+                response_text = await response.text()
+                return response.status, response_text
+        except aiohttp.ClientError as e:
+            logger.error(f"HTTP error during operation {operation}: {str(e)}")
+            return None, str(e)
+
+    async def get_logs(self, vm_id):
+        if self.pubkey_signature_header is None:
+            self.pubkey_signature_header = self._generate_pubkey_signature_header()
+
+        ws_url = f"https://{self.expected_domain}/control/machine/{vm_id}/logs"
+
+        payload = {
+            "time": datetime.datetime.utcnow().isoformat() + "Z",
+            "method": "GET",
+            "path": f"/control/machine/{vm_id}/logs",
+        }
+        payload_as_bytes = json.dumps(payload).encode("utf-8")
+        headers = {"X-SignedPubKey": self.pubkey_signature_header}
+        payload_signature = JWA.signing_alg("ES256").sign(
+            self.ephemeral_key, payload_as_bytes
+        )
+        headers["X-SignedOperation"] = json.dumps(
+            {
+                "payload": payload_as_bytes.hex(),
+                "signature": payload_signature.hex(),
+            }
+        )
+
+        try:
+            async with aiohttp.ClientSession() as session:
+                async with session.ws_connect(ws_url) as ws:
+                    logger.error(f"Connecting to WebSocket URL: {ws_url}")
+
+                    auth_message = {
+                        "auth": {
+                            "X-SignedPubKey": headers["X-SignedPubKey"],
+                            "X-SignedOperation": headers["X-SignedOperation"],
+                        }
+                    }
+                    logger.error(f"Sending auth message: {auth_message}")
+                    await ws.send_json(auth_message)
+                    response = await ws.receive()
+                    logger.error(response.data)
+        except Exception as e:
+            logger.error(f"error : {e}")
+
+    async def get_logs_as_text(self, vm_id):
+        logs = []
+
+        async def collect_logs(content):
+            try:
+                msg = json.loads(content)
+                logs.append(msg["message"])
+            except Exception as e:
+                logger.error(f"Unable to parse content: {content}, Error: {str(e)}")
+
+        original_on_message = self.on_message
+        self.on_message = collect_logs
+
+        await self.get_logs(vm_id)
+
+        self.on_message = original_on_message
+        return "\n".join(logs)
+
+    async def start_instance(self, vm_id):
+        return await self.notify_allocation(vm_id)
+
+    async def stop_instance(self, vm_id):
+        return await self.perform_operation(vm_id, "stop")
+
+    async def reboot_instance(self, vm_id):
+
+        return await self.perform_operation(vm_id, "reboot")
+
+    async def erase_instance(self, vm_id):
+        return await self.perform_operation(vm_id, "erase")
+
+    async def expire_instance(self, vm_id):
+        return await self.perform_operation(vm_id, "expire")
+
+    async def notify_allocation(self, vm_id) -> Tuple[Any, str]:
+        json_data = {"instance": vm_id}
+        async with self.session.post(
+            f"https://{self.expected_domain}/control/allocation/notify", json=json_data
+        ) as s:
+            form_response_text = await s.text()
+            return s.status, form_response_text
+
+    async def manage_instance(self, vm_id, operations):
+        for operation in operations:
+            logger.info(f"Performing operation: {operation}")
+            status, response = await self.perform_operation(vm_id, operation)
+            if status != 200:
+                return status, response
+        return
+
+    async def close(self):
+        await self.session.close()
+
+    async def __aenter__(self):
+        return self
+
+    async def __aexit__(self, exc_type, exc_value, traceback):
+        await self.close()