identity-impersonation

User impersonation for staff support workflows

What it is for

User impersonation library crates for staff support workflows.

This crate provides a secure way for staff members to "view as" customers for support and debugging purposes, with full audit logging.

# Features

• Extended JWT claims with impersonator tracking
• Permission checks (staff can't impersonate other staff)
• Shorter token expiry for impersonation sessions
• Audit event generation for compliance

# Example

use identity_impersonation::{ImpersonationClaims, ImpersonationRequest, ImpersonationService};

// Staff initiates impersonation
let request = ImpersonationRequest {
staff_user_id: staff_id,
target_user_id: customer_id,
};

let result = service.start_impersonation(request).await?;
// result.token contains JWT with impersonator_id set
// result.audit_event can be persisted to audit log

Capabilities

No public items.

How to use it

No examples/ target and no doctest in this crate's rustdoc. The tests listed under Verification are the closest executable usage.

Module structure

No public modules: the crate root is its whole surface.

Public surface

No public items.

Re-exports. Exported here, defined elsewhere.

Boundary

Reaches into foundation.

Shares tier identity with 7 other crates: identity-auth, identity-identifiers, identity-parties, identity-party-places, identity-rbac, identity-tenant, identity-user-prefs.

_What this crate deliberately does NOT own is a judgment. No committed registry records one for it, so none is stated here._

Where it sits

Tier flow. Which tiers this crate's own edges cross.

flowchart LR
  n_identity["identity"] --> n_foundation["foundation"]

Dependencies

Runtime, in this workspace.

Runtime, from outside the workspace.

Development, from outside the workspace.

Build. None.

Depended on by. 1 workspace crate.

Signal flow — what reaches this crate, and what it reaches.

flowchart LR
  n_application_impersonation["application-impersonation"] -->|uses| SELF
  SELF["identity-impersonation"]
  SELF -->|runtime| n_foundation_audit_log["foundation-audit-log"]
  classDef self fill:#1f883d,stroke:#1f883d,color:#fff;
  class SELF self;

Feature flags

No Cargo features are defined: every capability is unconditional, so no consumer can receive a half-wired crate.

Targets

Error model

No public error type was detected: no public item declares a type named *Error, and no public signature returns one.

Operational characteristics

No unsafe block, unsafe fn, unsafe impl or unsafe trait was found by the parser anywhere in this crate's source.

Configuration

No environment variable is read with a literal name anywhere in this crate. A variable whose key is computed at run time cannot be listed here, and is not claimed to be absent.

Related capabilities

1 workspace crate depends on this one: application-impersonation.

Verification

What the tests establish, by name:

• test_claims_is_impersonating — src/lib.rs
• test_claims_not_impersonating — src/lib.rs
• test_config_custom — src/lib.rs
• test_config_defaults — src/lib.rs
• test_impersonation_event_creation — src/lib.rs
• test_impersonation_request_reject_admin_target — src/lib.rs
• test_impersonation_request_reject_non_staff_initiator — src/lib.rs
• test_impersonation_request_reject_staff_target — src/lib.rs
• test_impersonation_request_validation — src/lib.rs
• accepts_real_secret_and_round_trips — src/service.rs
• rejects_alg_confusion — src/service.rs
• rejects_default_secret — src/service.rs
• rejects_empty_secret — src/service.rs
• rejects_expired_token — src/service.rs
• rejects_missing_audience_and_issuer — src/service.rs
• rejects_token_omitting_audience_and_issuer — src/service.rs
• rejects_token_omitting_audience_only — src/service.rs
• rejects_token_omitting_issuer_only — src/service.rs
• rejects_wrong_audience — src/service.rs

Documentation coverage

Metrics

pie showData
    title Rust source composition
    "Code" : 755
    "Blank or comment" : 358

Generation

Rendered by tools-corpus corpus readme from repository evidence alone, renderer schema 2, lexicon current. No model, network service or database was consulted. Regenerate with tools-corpus corpus readme --write; verify with --check.