Merge 847e3cefa2 into 1e3e7f808b
Andrew Kozlik
1 month ago
committed by
GitHub
commit
952977e3f3
@ -0,0 +1,208 @@
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from __future__ import annotations
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import os
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import secrets
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from dataclasses import dataclass
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from typing import Any
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from typing_extensions import Self
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import click
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import requests
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import serial
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SERVER_TOKEN = ""
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SERVER_URL = "http://localhost:8000/provision"
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@dataclass
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class ProvisioningResult:
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device_cert: bytes
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fido_privkey: bytes
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fido_cert: bytes
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production: bool
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@classmethod
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def from_json(cls, json: dict[str, Any]) -> Self:
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return cls(
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device_cert=bytes.fromhex(json["device_cert"]),
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fido_privkey=bytes.fromhex(json["fido_privkey"]),
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fido_cert=bytes.fromhex(json["fido_cert"]),
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production=json["production"],
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)
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def write(self, connection: Connection) -> None:
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connection.command("CERTDEV WRITE", self.device_cert)
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cert_dev = connection.command("CERTDEV READ")
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if cert_dev != self.device_cert:
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print("Device certificate mismatch")
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print("Expected:", self.device_cert)
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print("Got: ", cert_dev)
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assert cert_dev == self.device_cert
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connection.command("CERTFIDO WRITE", self.fido_cert)
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cert_fido = connection.command("CERTFIDO READ")
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assert cert_fido == self.fido_cert
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connection.command("KEYFIDO WRITE", self.fido_privkey)
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key_fido = connection.command("KEYFIDO READ")
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assert key_fido is not None
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assert key_fido in self.fido_cert
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@dataclass
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class DeviceInfo:
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optiga_id: bytes
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cpu_id: bytes
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device_cert: bytes
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@classmethod
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def read(cls, connection: Connection) -> Self:
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cpu_id = connection.command("CPUID READ")
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optiga_id = connection.command("OPTIGAID READ")
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cert_bytes = connection.command("CERTINF READ")
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assert optiga_id is not None
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assert cpu_id is not None
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assert cert_bytes is not None
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return cls(optiga_id, cpu_id, cert_bytes)
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class ProdtestException(Exception):
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def __init__(self, text: str) -> None:
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super().__init__(text)
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self.text = text
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class Connection:
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def __init__(self, path: str = "/dev/ttyACM0") -> None:
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self.connection = serial.Serial(path, 115200, timeout=5)
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def readline(self) -> bytes:
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line = self.connection.readline().strip()
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line_str = line.decode()
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if len(line_str) > 100:
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line_str = line_str[:100] + "..."
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print("<<<", line_str)
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return line
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def writeline(self, data: bytes) -> None:
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data_str = data.decode()
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if len(data_str) > 100:
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print(">>>", data_str[:100] + "...")
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else:
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print(">>>", data_str)
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for byte in data:
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if byte < 32 or byte > 126:
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print("!!!", byte, "is not printable")
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continue
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self.connection.write(bytes([byte]))
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echo = self.connection.read(1)
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assert echo[0] == byte
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self.connection.write(b"\r")
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assert self.connection.read(2) == b"\r\n"
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# self.connection.write(data + b"\r")
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# echo = self.connection.read(len(data) + 2)
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# print(len(echo), len(data) + 2)
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# assert echo[:-2] == data
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# assert echo[-2:] == b"\r\n"
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def command(self, cmd: str, *args: Any) -> bytes | None:
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cmd_line = cmd
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for arg in args:
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if isinstance(arg, bytes):
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cmd_line += " " + arg.hex()
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else:
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cmd_line += " " + str(arg)
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self.writeline(cmd_line.encode())
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res = self.readline()
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if res.startswith(b"ERROR"):
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error_text = res[len(b"ERROR ") :].decode()
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raise ProdtestException(error_text)
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if not res.startswith(b"OK"):
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raise ProdtestException("Unexpected response: " + res.decode())
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res_arg = res[len(b"OK ") :]
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if not res_arg:
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return None
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try:
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return bytes.fromhex(res_arg.decode())
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except ValueError:
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return res_arg
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def provision_request(
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device: DeviceInfo, url: str, verify: bool = True
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) -> ProvisioningResult:
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request = {
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"tester_id": SERVER_TOKEN,
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"run_id": secrets.token_hex(16),
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"optiga_id": device.optiga_id.hex(),
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"cpu_id": device.cpu_id.hex(),
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"cert": device.device_cert.hex(),
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"model": "T2B1",
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}
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resp = requests.post(url, json=request, verify=verify)
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if resp.status_code == 400:
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print("Server returned error:", resp.text)
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resp.raise_for_status()
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resp_json = resp.json()
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return ProvisioningResult.from_json(resp_json)
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@click.group()
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def cli() -> None:
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pass
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@cli.command()
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def identify() -> None:
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connection = Connection()
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connection.command("PING")
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DeviceInfo.read(connection)
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@cli.command()
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@click.option("--wipe", is_flag=True, help="Wipe the device")
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def lock(wipe) -> None:
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connection = Connection()
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connection.command("PING")
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connection.command("LOCK")
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if wipe:
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connection.command("WIPE")
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@cli.command()
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@click.option("-u", "--url", default=SERVER_URL, help="Server URL")
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@click.option("-d", "--device", default="/dev/ttyACM0", help="Device path")
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@click.option(
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"--no-verify", is_flag=True, help="Disable server certificate verification"
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)
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@click.option(
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"--lock/--no-lock", default=True, help="Lock the device after provisioning"
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)
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def provision(url, device, no_verify, lock) -> None:
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global SERVER_TOKEN
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SERVER_TOKEN = os.environ.get("SERVER_TOKEN")
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if SERVER_TOKEN is None:
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raise click.ClickException("SERVER_TOKEN environment variable is not set")
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connection = Connection(device)
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# test the connection
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connection.command("PING")
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# grab CPUID, OPTIGAID and device certificate
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device = DeviceInfo.read(connection)
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# call the provisioning server
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result = provision_request(device, url, not no_verify)
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# write provisioning result to the device
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result.write(connection)
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if lock:
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connection.command("LOCK")
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connection.command("WIPE")
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if __name__ == "__main__":
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cli()
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