fix: authenticate the ProtonVPN import over SRP #146

Merged
mysticalsoap merged 1 commit from fix/proton-srp-import into trunk 2026-08-24 15:23:21 -04:00
Owner

Problem

/vpn/logicals requires authentication since Proton made SRP mandatory, so the ProtonVPN provider cannot import at all. Closes #33.

Fix

  • SRP login via python-proton-core (the base of Proton's official Linux app, in Arch [extra]), added as an optdepend and imported lazily — non-Proton users never need it, and a Proton import without it fails with a message naming the package.
  • The form now takes the Proton account credentials instead of the OpenVPN pair; the OpenVPN credentials are fetched from /vpn after login and written to the auth file, so the tunnel side is unchanged.
  • New optional 2FA code field (shown only for ProtonVPN) for accounts with TOTP enabled; distinct failure messages for code-required and code-rejected.
  • API host moves to vpn-api.proton.me (proton-core's production environment), including the temporary firewall allow.
  • /vpn/config replies with a raw .ovpn that proton-core's api_request would JSON-parse, so that single download uses requests carrying the session's auth headers.
  • Base Provider grows ProviderError (a failure with its own user-facing message) and a username setter mirroring the existing password one.

Verification

  • pytest: 334 passed; CI lint gate (ruff, compileall) clean locally.
  • New tests cover: happy-path parse (unchanged assertions), credential swap onto the auth file, wrong password → auth failure, 2FA required/accepted/rejected, missing proton-core, unreachable API → network error, session logout after import.
  • Verified against the live API without an account: /auth/info answers an SRP challenge with proton-core's default x-pm-appversion: Other, /vpn/logicals and /vpn are 401-gated, /vpn/config exists (400 on a bogus LogicalID).
  • Not yet verified: a real end-to-end import needs an account — install python-proton-core, build with packaging/arch/build-branch-and-install.sh, and import from the GUI.
  • Dropped a truncated comment fragment at the bottom of providers/protonvpn.py left behind by the package split (3bdc834) — its full version lives with copy_companion_files in custom.py.

🤖 Generated with Claude Code

## Problem `/vpn/logicals` requires authentication since Proton made SRP mandatory, so the ProtonVPN provider cannot import at all. Closes #33. ## Fix - SRP login via **python-proton-core** (the base of Proton's official Linux app, in Arch `[extra]`), added as an **optdepend** and imported lazily — non-Proton users never need it, and a Proton import without it fails with a message naming the package. - The form now takes the **Proton account credentials** instead of the OpenVPN pair; the OpenVPN credentials are fetched from `/vpn` after login and written to the auth file, so the tunnel side is unchanged. - New optional **2FA code field** (shown only for ProtonVPN) for accounts with TOTP enabled; distinct failure messages for code-required and code-rejected. - API host moves to `vpn-api.proton.me` (proton-core's production environment), including the temporary firewall allow. - `/vpn/config` replies with a raw .ovpn that proton-core's `api_request` would JSON-parse, so that single download uses `requests` carrying the session's auth headers. - Base `Provider` grows `ProviderError` (a failure with its own user-facing message) and a `username` setter mirroring the existing `password` one. ## Verification - `pytest`: 334 passed; CI lint gate (`ruff`, `compileall`) clean locally. - New tests cover: happy-path parse (unchanged assertions), credential swap onto the auth file, wrong password → auth failure, 2FA required/accepted/rejected, missing proton-core, unreachable API → network error, session logout after import. - Verified against the live API without an account: `/auth/info` answers an SRP challenge with proton-core's default `x-pm-appversion: Other`, `/vpn/logicals` and `/vpn` are 401-gated, `/vpn/config` exists (400 on a bogus LogicalID). - Not yet verified: a real end-to-end import needs an account — install `python-proton-core`, build with `packaging/arch/build-branch-and-install.sh`, and import from the GUI. ## Related fixes (found along the way, technically out of scope) - Dropped a truncated comment fragment at the bottom of `providers/protonvpn.py` left behind by the package split (3bdc834) — its full version lives with `copy_companion_files` in `custom.py`. 🤖 Generated with [Claude Code](https://claude.com/claude-code)
fix: authenticate the ProtonVPN import over SRP
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627d1d8656
The API turned /vpn/logicals into an authenticated endpoint, which
killed the unauthenticated import outright (#33). Authentication is
SRP, so it comes from python-proton-core (the base of Proton's own
Linux app) rather than hand-rolled crypto; the library is an optdepend
loaded lazily because only ProtonVPN imports need it.

The form now takes the Proton account credentials, plus a TOTP code in
a new optional field for accounts with 2FA enabled. The OpenVPN pair
the tunnel authenticates with is fetched from /vpn after login and
written to the auth file in place of what was typed.

/vpn/config still answers with a raw .ovpn, which proton-core's
api_request would try to parse as JSON, so that one download keeps
using requests wearing the session's auth headers.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
fix: answer Proton's CAPTCHA gate and present as the official client
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e3e46a914e
proton-core's default appversion ("Other") drew Proton's anti-abuse
CAPTCHA demand (422/9001) on the first live login attempt, which fell
through to the generic import-failed message. The session now sends the
official Linux app's appversion/user-agent, and a CAPTCHA demand that
still fires maps to its own failure message - it has no headless
answer, so honesty is all the import can offer.

Meant to be squashed into the SRP commit before merge.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
change: identify honestly instead of presenting as the official client
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ef64c0be5b
Impersonating the official app's appversion lied to the API operator
and would go stale with every official release. The API accepts no
third-party appversion strings, so proton-core's default ("Other")
stands as the honest generic value, and the free-form user agent
carries who we actually are. Whether "Other" is what drew the CAPTCHA
demand was never established anyway - the 9001 mapping stays either
way.

Meant to be squashed into the SRP commit before merge.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Author
Owner

ef64c0b drops the official-client impersonation added after the first live test: it lied to the API operator, undermined the abuse heuristics it was dodging, and would go stale with every official release — and the appversion-caused-the-CAPTCHA theory was never actually established. The session now uses proton-core's default appversion ("Other", the sanctioned generic) plus an honest aqomui (Linux) user agent. The 9001 CAPTCHA mapping stays. Both follow-up commits are meant to be squashed into the SRP commit before merge. If CAPTCHA demands persist with the honest identity, the next step is proton-core's human-verification flow (email code) as its own issue — not identity games.

ef64c0b drops the official-client impersonation added after the first live test: it lied to the API operator, undermined the abuse heuristics it was dodging, and would go stale with every official release — and the appversion-caused-the-CAPTCHA theory was never actually established. The session now uses proton-core's default appversion ("Other", the sanctioned generic) plus an honest `aqomui (Linux)` user agent. The 9001 CAPTCHA mapping stays. Both follow-up commits are meant to be squashed into the SRP commit before merge. If CAPTCHA demands persist with the honest identity, the next step is proton-core's human-verification flow (email code) as its own issue — not identity games.
fix: log handled import failures and the CAPTCHA verification link
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c5ea6fde45
A handled failure only reached the gui's transient surfaces - the
second live attempt left no trace in the log at all. fail() now writes
the message there too.

Probing /auth with a nonexistent user showed the CAPTCHA gate
(422/9001) fires deterministically for any unrecognized appversion and
offers no method besides captcha; the reply's WebUrl is a page a human
can solve in a normal browser, so the 9001 handler logs it and the
failure message points at the log.

Meant to be squashed into the SRP commit before merge.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
fix: carry the solved CAPTCHA token on the retried login
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fcd50b4bf8
Verified live that solving the verification page grants no broader
grace - every fresh login attempt draws a fresh demand, so the solved
token must ride the retry in the x-pm-human-verification headers
(names from go-proton-api; proton-core's own provide_token is an empty
stub). The token from the last demand waits root-owned under ROOTDIR
until the next attempt spends it or it expires.

Meant to be squashed into the SRP commit before merge.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
fix: survive hollow logicals and degenerate sample configs
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f2de2f73ee
The first authenticated live import crashed on a logical carrying no
physical servers - s["Servers"][0] with an empty list. Those are
skipped now. The other unguarded indexing in the same routine, the
tls-auth split of the sample config, fails with its own message
instead of an IndexError if the reply ever loses its certificate
material.

Meant to be squashed into the SRP commit before merge.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
fix: the fleet's OpenVPN configs use tls-crypt now
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96f1439294
The live /vpn/config reply carries ca + tls-crypt; the template and the
import still expected tls-auth with key-direction 1. The template also
mirrors the other stale options against a current official download:
AES-256-GCM instead of CBC, comp-lzo dropped (compression is off
fleet-wide), setenv CLIENT_CERT 0, mssfix 0. proto/remote keep their
trailing space - write_config finds them by 'proto '/'remote ' prefix.

Meant to be squashed into the SRP commit before merge.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Author
Owner

Verified live end to end (2026-08-24): SRP login with account credentials, CAPTCHA demand → solved link → token-carrying retry accepted, /vpn OpenVPN credentials fetched into the auth file, full logical list imported, tls-crypt certificate material written. Live testing surfaced and fixed along the way: hollow logicals (empty Servers arrays) in the real fleet, and the fleet's move from tls-auth to tls-crypt (template modernized against a current official config). README now documents the sign-in flow. Remaining branch commits are marked for squashing into the SRP commit before merge; suggested merge order: #148/#149/#151 first, then this rebased on top.

**Verified live end to end** (2026-08-24): SRP login with account credentials, CAPTCHA demand → solved link → token-carrying retry accepted, /vpn OpenVPN credentials fetched into the auth file, full logical list imported, tls-crypt certificate material written. Live testing surfaced and fixed along the way: hollow logicals (empty Servers arrays) in the real fleet, and the fleet's move from tls-auth to tls-crypt (template modernized against a current official config). README now documents the sign-in flow. Remaining branch commits are marked for squashing into the SRP commit before merge; suggested merge order: #148/#149/#151 first, then this rebased on top.
add: document the ProtonVPN sign-in flow
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afa7e0e703
Account credentials, the 2FA field, the proton-core optdepend and the
solve-then-retry CAPTCHA dance are all new behavior a user cannot
guess from the form alone. Also drops the feature list's mention of
Private Internet Access, gone since the provider lineup was settled.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
mysticalsoap force-pushed fix/proton-srp-import from afa7e0e703
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to a5de590520
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2026-08-24 15:19:24 -04:00
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mysticalsoap deleted branch fix/proton-srp-import 2026-08-24 15:23:21 -04:00
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