b3 of the multi-provider email roadmap. Adds ImapConnection model + table
(reconciler pattern, SQLite+MySQL), ImapService (MailKit-backed IMAP client),
ImapProvider implementing the existing IEmailProvider contract unchanged,
and ImapController for credential-based connect (no OAuth — user supplies
host/username/password directly, verified by a live connect before storage).
Scope, documented inline with ponytail: comments:
- INBOX only, no multi-folder support.
- Thread grouping approximates the References/In-Reply-To chain root rather
than the IMAP THREAD extension, which not every server implements.
- External message ids are IMAP UIDs, scoped to the connection's current
UIDVALIDITY.
Security: ran the security-audit skill against this diff (credential
handling + arbitrary-host connect is exactly the class of change the
standing security gate exists for). Found and fixed a real SSRF: the
connect endpoint let an authenticated user point the server at an
arbitrary host:port with no internal-range check, and connect-vs-auth
failure was distinguishable to the caller -- together a working oracle to
fingerprint internal services (loopback/RFC1918/link-local/cloud metadata)
from the server's network position. Fixed with EnsureHostIsExternalAsync
(DNS-resolve + reject internal ranges, re-checked on every reconnect to
close the DNS-rebinding gap) and a single generic failure message that no
longer distinguishes connect vs auth failure. 7 regression tests added.
Dependency: MailKit 4.17.0 (MIT license) on JobTrackerBackend.csproj --
stdlib has no IMAP client; hand-rolling IMAP4rev1 (TLS, SASL, MIME parsing)
would be a large, security-sensitive protocol implementation nobody asked
for, so this is the correct dependency, not a stdlib substitute.
168/168 green (161 existing + 7 new SSRF regression tests; the earlier
14 IMAP feature tests are included in the 161).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
b2 of the multi-provider email roadmap. Mirrors the Gmail provider's shape
end-to-end so the two stay structurally interchangeable:
- MicrosoftGraphConnection model + table (reconciler pattern, SQLite+MySQL,
same shape as GmailConnection: encrypted refresh/access token, sync state).
- MicrosoftGraphOAuthService: auth-code + offline-access flow against
login.microsoftonline.com, encrypted token storage via IDataProtector,
message search/thread/detail fetch against Microsoft Graph (conversationId
stands in for Gmail's threadId), attachment listing.
- MicrosoftGraphProvider implements IEmailProvider — no contract changes;
the existing seam was already provider-neutral.
- MicrosoftGraphController: connect-url/oauth/callback/status/disconnect,
mirrors GmailController's OAuth surface exactly (including the popup
postMessage handshake). Job-matching/review endpoints stay Gmail-only for
now, per the roadmap — generalising those needs the frontend provider
picker work, not this slice.
- Registered in DI + IEmailProviderRegistry (multi-registration of
IEmailProvider, resolved by ProviderKey).
- Config: Microsoft:ClientId/ClientSecret/TenantId/RedirectUri, wired through
docker-compose.yml + .env.example alongside the existing Google:Gmail* keys.
- Tests: MicrosoftGraphControllerTests (OAuth lifecycle) +
MicrosoftGraphProviderTests (DTO mapping onto the neutral contract).
147/147 green (135 existing + 12 new).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
First slice toward multi-provider email (Gmail + Microsoft Graph + IMAP +
manual/free-text, per docs/remaster/PRODUCT_DIRECTION.md). Adds a provider-
neutral contract (search / list-thread / get-message / get-connection) with
neutral DTOs, a registry to resolve providers by key, and a GmailProvider that
adapts the existing IGmailOAuthService to it.
No behaviour change: the seam is registered in DI but not yet consumed. Follow-up
slices migrate GmailController's read paths onto IEmailProvider (folding in the
N+1 fixes) and add MicrosoftGraphProvider / ImapProvider / a manual provider.
Build clean; backend suite 135/135 green.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
cesnimda