tm1-auth 0.1.1

CAM passport authentication for IBM Planning Analytics (TM1) with MFA support

tm1-auth

A Python library for authenticating with IBM Planning Analytics (TM1) in environments that use Cognos Access Manager (CAM) with multi-factor authentication.

TM1py requires a cam_passport to connect to CAM-secured environments, but obtaining one programmatically is non-trivial when MFA is involved. tm1-auth handles the browser-based login flow for you and captures the passport automatically.

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Features

• Automated CAM passport retrieval via a browser login window
• Works alongside TM1py - pass the retrieved passport directly to TM1Service
• Supports system browsers (Edge, Chrome) as well as Playwright's bundled Chromium
• Optional in-memory passport caching via PassportCache
• Cross-platform: Windows, macOS, Linux

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Requirements

• Python 3.8+
• Playwright

pip install playwright
playwright install chromium

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Installation

pip install tm1-auth

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Quick start

from tm1_auth import get_cam_passport
from TM1py import TM1Service

passport = get_cam_passport(
    auth_url="https://your-cognos-server/ibmcognos/bi/v1/disp"
)

with TM1Service(address="your-tm1-server", port=5001,
                cam_passport=passport, ssl=True) as tm1:
    print(tm1.server.get_product_version())

A browser window opens, you complete the login flow (including MFA), and the passport is captured automatically. The window closes once the passport is detected.

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Multiple environments

By default all calls share the same browser profile (~/.tm1_auth/browser_profile). Whether this is useful depends on your setup.

Isolated sessions — use when environments have different credentials, or you want explicit login control for each:

stg_passport = get_cam_passport(
    auth_url="https://stg-cognos/ibmcognos/bi/v1/disp",
    profile_dir="~/.tm1_auth/stg",
)

prd_passport = get_cam_passport(
    auth_url="https://prd-cognos/ibmcognos/bi/v1/disp",
    profile_dir="~/.tm1_auth/prd",
)

Each call gets its own browser session and will prompt for login independently.

Shared session — use when environments share the same identity provider and you want to avoid repeated logins:

stg_passport = get_cam_passport(
    auth_url="https://stg-cognos/ibmcognos/bi/v1/disp",
)

prd_passport = get_cam_passport(
    auth_url="https://prd-cognos/ibmcognos/bi/v1/disp",
)

Both calls use the default shared profile. If your identity provider supports SSO, the second call may complete without prompting for credentials or MFA again. This is not guaranteed — it depends entirely on your IdP configuration and session policies.

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Caching passports

If you connect to TM1 multiple times within the same script, use PassportCache to avoid repeated browser logins:

from tm1_auth import get_cam_passport
from tm1_auth.cache import PassportCache

cache = PassportCache(ttl_seconds=3600)

def get_passport(auth_url):
    passport = cache.get(auth_url)
    if not passport:
        passport = get_cam_passport(auth_url)
        cache.set(auth_url, passport)
    return passport

If a cached passport is rejected by TM1py, call cache.invalidate(auth_url) and re-authenticate:

try:
    tm1 = TM1Service(address=address, port=port,
                     cam_passport=get_passport(auth_url), ssl=True)
except Exception:
    cache.invalidate(auth_url)
    tm1 = TM1Service(address=address, port=port,
                     cam_passport=get_passport(auth_url), ssl=True)

PassportCache is in-memory only and does not persist across Python processes.

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API reference

get_cam_passport

get_cam_passport(
    auth_url: str,
    profile_dir: str | None = None,
    timeout_seconds: int = 90,
    headless: bool = False,
    executable_path: str | None = None,
    verbose: bool = True,
) -> str

Parameter	Description
auth_url	The Cognos dispatcher URL (e.g. .../ibmcognos/bi/v1/disp)
profile_dir	Persistent browser profile directory. Same directory = shared session. Different directories = isolated sessions. Defaults to ~/.tm1_auth/browser_profile.
timeout_seconds	Seconds to wait for login before raising PassportTimeoutError. Default 90.
headless	Run without a visible browser window. Not recommended for MFA flows. Default False.
executable_path	Path to a specific browser executable. If not set, tries system Edge then Chrome then Playwright's bundled Chromium.
verbose	Print progress messages to stdout. Default True.

Returns: The cam_passport cookie value as a string.

Raises:

• AuthenticationError — browser failed to launch or could not navigate to the auth URL
• PassportTimeoutError — no passport detected within timeout_seconds

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PassportCache

PassportCache(ttl_seconds: int = 3600)

Method	Description
get(auth_url)	Return cached passport or None if missing/expired
set(auth_url, passport)	Cache a passport
invalidate(auth_url)	Remove a specific entry
clear()	Remove all entries

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Exceptions

from tm1_auth.exceptions import AuthenticationError, PassportTimeoutError

Both inherit from AuthenticationError. Catch AuthenticationError to handle all auth failures, or the specific subclass for finer control.

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Contributing

Contributions welcome. Please open an issue before submitting a pull request for significant changes.

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Licence

MIT