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Validates complete data isolation between tenants, tests cross-tenant access, ensures proper query scoping
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| name | test-multitenant-isolation |
| description | Validates complete data isolation between tenants, tests cross-tenant access, ensures proper query scoping |
| user-invocable | true |
Validates complete data isolation between tenants to prevent catastrophic data leaks. Tests cross-tenant access attempts and ensures all database queries are properly scoped.
Run this skill:
# Run full multi-tenant isolation test suite
cargo test --test mcp_multitenant_complete_test --features testing -- --nocapture
# Run specific isolation tests
cargo test multitenant -- --nocapture
# Test cross-tenant access attempts
cargo test test_cross_tenant -- --nocapture
# Test tenant context middleware
cargo test test_tenant_middleware -- --nocapture
# Search for queries without tenant_id filtering
echo "🔍 Checking for unscoped queries..."
rg "SELECT.*FROM.*WHERE" src/ --type rust -A 3 | rg -v "tenant_id" | head -20
# Verify TenantContext usage in routes
echo "🔍 Checking route handler tenant context..."
rg "Extension.*TenantContext" src/routes/ --type rust -n | wc -l
# Check for hardcoded tenant IDs (security issue)
rg -i "tenant.*=.*\"[a-f0-9-]{36}\"" src/ --type rust -n || echo "✓ No hardcoded tenant IDs"
// Tenant A creates activity
// Tenant B attempts to read it
// Expected: 403 Forbidden or empty result
// Middleware extracts tenant_id from JWT
// All subsequent queries filtered by tenant_id
// Expected: Only tenant's own data visible
// Tenant A's API key used
// Attempt to access Tenant B's data
// Expected: Empty results (not 403 - security through obscurity)
// OAuth tokens stored per tenant
// Tenant A cannot access Tenant B's tokens
// Expected: Null/NotFound
# All queries MUST include tenant_id filter
# Examples of CORRECT patterns:
# ✅ SELECT with tenant_id
SELECT * FROM activities WHERE tenant_id = $1 AND user_id = $2
# ✅ INSERT with tenant_id
INSERT INTO activities (tenant_id, user_id, ...) VALUES ($1, $2, ...)
# ✅ UPDATE with tenant_id
UPDATE activities SET ... WHERE tenant_id = $1 AND id = $2
# ✅ DELETE with tenant_id
DELETE FROM activities WHERE tenant_id = $1 AND id = $2
// All route handlers must use TenantContext
// ✅ Correct
pub async fn get_activities(
Extension(tenant): Extension<TenantContext>,
Json(params): Json<GetActivitiesParams>,
) -> Result<Json<Activities>, AppError> {
// tenant.tenant_id automatically scopes queries
}
// ❌ Incorrect (missing TenantContext)
pub async fn get_activities(
Json(params): Json<GetActivitiesParams>,
) -> Result<Json<Activities>, AppError> {
// No tenant scoping!
}
test test_tenant_isolation ... ok
test test_cross_tenant_activity_access ... ok (should fail access)
test test_cross_tenant_user_access ... ok (should fail access)
test test_tenant_oauth_isolation ... ok
test test_tenant_api_key_isolation ... ok
test result: ok. 12 passed; 0 failed
# ❌ BAD: Cross-tenant access succeeded
test test_cross_tenant_activity_access ... FAILED
Expected: Forbidden or empty
Actual: Returned data from other tenant
# ❌ BAD: Query without tenant_id
SELECT * FROM activities WHERE user_id = $1
(Missing tenant_id filter!)
# ❌ BAD: Tenant ID from request body instead of JWT
let tenant_id = params.tenant_id; // User can forge!
# Verify OAuth tokens are stored per-tenant (not global)
echo "🔐 Checking OAuth credential isolation..."
rg "oauth_token|refresh_token|access_token" src/database/ --type rust -A 3 | \
rg "tenant_id" | wc -l
echo "OAuth token queries with tenant_id scoping"
# Check that provider credentials are tenant-scoped
rg "provider.*credential|strava.*token|garmin.*token" src/ --type rust -A 5 | \
rg -v "tenant_id" | rg "SELECT|INSERT|UPDATE" && \
echo "⚠️ Provider credential query without tenant_id!" || \
echo "✓ Provider credentials properly tenant-scoped"
# Verify config mutations check tenant membership
echo "🔐 Checking config write/delete tenant scoping..."
rg "fn.*config.*(create|update|delete|write|remove)" src/ --type rust -A 10 | \
rg "tenant_id" | wc -l
echo "Config mutation functions with tenant_id check"
# Check admin tools verify target belongs to caller's tenant
rg "fn.*(assign|remove|update).*coach|fn.*(assign|remove|update).*user" src/ --type rust -A 10 | \
rg "tenant_id" | wc -l
echo "Admin tool functions with tenant_id verification"
# Verify LLM/AI settings are per-tenant
echo "🔐 Checking LLM API key isolation..."
rg "llm.*key|ai.*key|gemini.*key|groq.*key|ollama.*url" src/ --type rust -A 5 | \
rg "tenant_id" | wc -l
echo "LLM key storage/retrieval with tenant_id scoping"
tests/mcp_multitenant_complete_test.rs - Main test suitesrc/tenant/mod.rs - TenantContext definitionsrc/middleware/tenant_middleware.rs - Tenant extractionsrc/database/mod.rs - Scoped database queriescheck-no-secrets - Secret detectionvalidate-architecture - Architectural validation