/identity-provider-recon

name: identity-provider-recon
description: "Organization-grade identity-fabric mapping: tenant/federation fingerprinting and the pre-auth user-ENUMERATION oracle methodology — enumeration and fingerprint only, never credential submission. Covers domain-to-tenant resolution (Microsoft getuserrealm.srf Managed/Federated namespace check, Entra OIDC metadata tenant-GUID extraction, Autodiscover v2), keyless Microsoft tenant-federation mapping (GetFederationInformation SOAP -> sibling-domain discovery, discover-only ROE, FEDERATED_WITH provenance edge held out of attack-path pivoting), Okta org-slug derivation + OIDC fingerprint + governed custom-domain enumeration, ADFS passive/active fingerprint + version inference, Google Workspace MX-correlated detection, generic OIDC (Auth0/Keycloak/Ping Identity/OneLogin/Duo) discovery, SAML metadata (5 paths), Azure AD Seamless-SSO Negotiate-challenge detection, Microsoft Defender for Identity (MDI) sensor-API presence check, the user-enumeration oracle methodology for Microsoft GetCredentialType (IfExistsResult semantics: exists / doesn't-exist / exists-in-federated-tenant / throttled) and Okta /api/v1/authn (errorCode differential), Medium-detectability discipline with a hard 20-candidate-per-tenant cap and admin/role interest-based ranking, and name x confirmed-email-pattern login-candidate synthesis that FAILS CLOSED with zero output when no org pattern is confirmed. Grounded directly in a production ASM implementation's sso_idp.py, tenant_recon.py, and core/email_patterns.py modules. Deepens — does not duplicate — offensive-osint skill's Identity Fabric endpoint reference with the tenant-federation MAP, the oracle WORKFLOW, and the candidate-SYNTHESIS methodology that reference lacks. Use when fingerprinting an organization's identity provider, mapping its tenant/federation boundary, running an authorized pre-auth user-enumeration pass, or synthesizing login candidates from harvested names to feed that oracle — never for password spray, credential submission, or auth bypass."
version: 1.0
sources: asm_reference_impl, public_research
triggers:
  - identity fabric
  - identity provider recon
  - IdP recon
  - IdP fingerprinting
  - tenant fingerprinting
  - tenant recon
  - SSO discovery
  - SSO fingerprinting
  - federation mapping
  - federation boundary
  - tenant federation map
  - domain to tenant resolution
  - GetFederationInformation
  - M365 tenant federation
  - Entra tenant recon
  - Azure AD tenant recon
  - Azure AD enum
  - entra enum
  - getuserrealm
  - Managed vs Federated namespace
  - okta enum
  - Okta org slug
  - Okta governed domains
  - Okta OIE vs Classic
  - ADFS enum
  - ADFS version fingerprint
  - ADFS mex endpoint
  - Google Workspace enum
  - SAML metadata discovery
  - generic OIDC discovery
  - Auth0 fingerprint
  - Keycloak fingerprint
  - tenant GUID extraction
  - Seamless SSO detection
  - Azure AD Seamless SSO
  - AZUREADSSOACC
  - MDI presence
  - Defender for Identity detection
  - user enumeration oracle
  - account existence enumeration
  - pre-auth user enum
  - GetCredentialType
  - IfExistsResult
  - Okta authn enum
  - authn endpoint enumeration
  - credential type endpoint
  - user enum detectability
  - email pattern synthesis
  - login candidate synthesis
  - login candidate list
  - name to email pattern
  - sibling tenant domains
  - federated sibling domain
  - fail closed synthesis
  - identity fabric mapping

Identity-Provider Recon — Tenant, Federation & User-Enumeration Oracle Mapping

> Companion skills: [`osint-methodology`](../osint-methodology/) (§6.2 detectability tagging, §11 > identity-fabric pointer — the "how to think" skill this plugs into) and > [`offensive-osint`](../offensive-osint/) (§22 Identity Fabric — the concrete endpoint/payload > reference this skill builds a workflow on top of, rather than re-listing). This skill answers the > question those two don't: **how do the tenant, its federation partners, its IdP, and its > user-enumeration oracle fit together as one map** — and where exactly enumeration stops and > credential submission begins.

0. When to Use / When NOT

**Use this skill when:**

• You need to resolve a domain to its identity tenant (Entra/Okta/ADFS/Google Workspace) and

determine whether auth is Managed or Federated.

• You need to map an org's **federation boundary** — every sibling domain that shares the same

M365/Azure AD tenant trust, not just the seed.

• You need to distinguish Entra vs. Okta vs. ADFS vs. Google Workspace vs. a generic OIDC IdP from

passive/low-detectability signals.

• You need to detect Seamless SSO or Microsoft Defender for Identity (MDI) presence — both change

the risk calculus of anything downstream.

• You have **authorization for a Medium-detectability, log-generating pass** and need to run a

pre-auth user-enumeration oracle (GetCredentialType / Okta `/api/v1/authn`) to build a valid-account list — **without ever submitting a password**.

• You have harvested employee names and a **confirmed** org email-format pattern and need to

synthesize ranked login candidates to feed that oracle.

**Do NOT use this skill when:**

• You need to submit credentials, replay breach creds, forge/replay a token, or confirm an

auth-bypass — that is a different, higher-authorization tier. See §14.

• The target's authorization for **active, logged** probing isn't established — the passive half of

this skill (§7–§10) needs the same soft-scope posture as every companion skill; the active half (§11) needs it explicitly, because it generates tenant-side audit-log events (§1, §11.4).

• You already have concrete endpoints and just need the reference table — go straight to

`offensive-osint` §22.

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1. Authorization & Legal Posture

Same base posture as `osint-methodology` §1: intended for assets the operator owns or has **written authorization** to assess.

**This skill carries a sharper posture than most of the pack because