Secret rotation cadence

Outcome

Every secret has a documented rotation owner, cadence, and procedure. Quarterly DEK rotation is automated via GitHub Actions; manual rotations are logged in docs/operations/rotation-log.md.

Prerequisites

• PLATFORM_ADMIN + Azure RBAC.
• gh CLI to dispatch workflows.

Rotation matrix

Secret	Rotated by	Cadence	Trigger
Per-tenant PHI DEK	pnpm rcm-core rotate-phi-dek	Quarterly (90d)	.github/workflows/rotate-phi-dek.yml (cron 0 2 1 */3 *)
Postgres admin password	az postgres flexible-server update	Annually	Manual; document in docs/operations/rotation-log.md
JWT signing secret	az keyvault secret set + App Service restart	Annually	Manual
Service Bus SAS	az servicebus namespace authorization-rule keys renew	Annually	Manual
Trading-partner credentials	RotateCredentialDialog	Per-partner contract	Operator-driven

Quarterly DEK rotation (automated)

The scheduled GitHub Action enumerates active tenants from identity.tenant and runs rotate-phi-dek against each.

Workflow input	Notes
environment	`dev
zeroize	When true, appends --zeroize after re-encryption to NULL legacy plaintext columns. Default false — only flip after a decrypt-spot-check confirms the new ciphertext is valid.

Required secrets:

• DATABASE_MASTER_URL — connection for identity.tenant enumeration.
• KEY_VAULT_URL — vault URL for the target environment.
• AZURE_CLIENT_ID, AZURE_TENANT_ID, AZURE_SUBSCRIPTION_ID — OIDC federated credential.

See PHI encryption at rest.

Manual rotation — Postgres admin password

NEW_PW=$(openssl rand -base64 24 | tr -d '+/=')
az postgres flexible-server update \
  --resource-group rg-rcm-prod \
  --name pg-master-rcm-prod \
  --admin-password "$NEW_PW"

# Update the bound Key Vault secret:
az keyvault secret set \
  --vault-name kv-rcm-prod-... \
  --name postgres-admin-password \
  --value "$NEW_PW"

# Restart the apps so they pick up the new secret:
for app in app-rcmcore-prod-eus2 app-edigateway-prod-eus2; do
  az webapp restart --name "$app" -g rg-rcm-prod
done

Log every rotation in docs/operations/rotation-log.md with timestamp, who ran it, and (for break-glass scenarios) why it had to happen out-of-band.

Manual rotation — JWT signing secret

JWT rotation invalidates every active session. Plan a maintenance window unless the rotation is triggered by a confirmed leak.

NEW_JWT=$(openssl rand -hex 48)
az keyvault secret set \
  --vault-name kv-rcm-prod-... \
  --name jwt-secret \
  --value "$NEW_JWT"

az webapp restart --name app-rcmcore-prod-eus2 -g rg-rcm-prod

After the restart, every existing JWT (access + refresh) is rejected on the next request. Users must re-authenticate.

Manual rotation — Service Bus SAS

az servicebus namespace authorization-rule keys renew \
  --resource-group rg-rcm-prod \
  --namespace-name sb-rcm-prod \
  --name RootManageSharedAccessKey \
  --key PrimaryKey

NEW_CONN=$(az servicebus namespace authorization-rule keys list \
  --resource-group rg-rcm-prod \
  --namespace-name sb-rcm-prod \
  --name RootManageSharedAccessKey \
  --query primaryConnectionString -o tsv)

az keyvault secret set \
  --vault-name kv-rcm-prod-... \
  --name service-bus-conn \
  --value "$NEW_CONN"

for app in app-rcmcore-prod-eus2 app-edigateway-prod-eus2; do
  az webapp restart --name "$app" -g rg-rcm-prod
done

In-flight messages are not lost — Service Bus rotates the SAS key without dropping queue contents.

Trading-partner credentials

Operator-driven via the Trading partner credential vault. The rotation flow updates the secret in Key Vault under trading-partner-cred-<partner-id> and records a rotated_at audit entry in rcm_master.trading_partner.

Validation

Check	Expected
docs/operations/rotation-log.md	Up to date with every manual rotation
Quarterly DEK workflow	Last run within 90 days
Apps healthy after restart	/health returns 200
Old JWT after rotation	Rejected with 401 on next request

Cross-references

• PHI encryption at rest for the per-tenant DEK details.
• Trading partner credential vault for partner-side rotations.

Next

9.5 — Env config viewer