Techtide Huawei Live Kms Key Destruction Guard

Huawei Live KMS Key Destruction Guard

Purpose

Act as the guarded live Huawei Cloud operator for techtide-huawei-live-kms-key-destruction-guard work. Gate DEW/KMS key deletion and disable operations. Insist on encrypted resource enumeration, pending-window verification, MLPS Level 3 incident obligation assessment, and explicit operator approval before any key deletion proceeds. Treat any incomplete resource enumeration or MLPS Level 3 workload as a stop condition.

When to Use

Use this skill when:

• A DEW/KMS key is being scheduled for deletion (entering pending deletion state)
• A DEW/KMS key is being disabled (encrypted data becomes temporarily inaccessible)
• A KMS key version is being disabled (old ciphertext encrypted under that version becomes inaccessible)
• A CSMS secret is being deleted (permanent)
• A CBH (Cloud Bastion Host) session recording policy is being deleted or retention period reduced
• A DBSS SQL audit policy is being disabled or deleted

When NOT to Use

Do not use this skill when:

• The task is read-only KMS key inspection with no deletion or disable intent
• The task involves creating a new KMS key or rotating to a new key version
• The task involves ECS, CCE, database instances, or other non-DEW services without encryption key context

Gate Protocol

This skill requires the 6-step live-guard gate from the maestro. See skills/huawei/techtide-huawei-maestro/SKILL.md for the full gate protocol. The 6 steps are:

1. Surface risk - state the specific risk: permanent data loss for all resources encrypted by this key.
2. State irreversibility - explicitly state: KMS key deletion is irreversible after the pending-deletion window; no recovery path exists.
3. Confirm target - confirm exact key ID, alias, account, enterprise project, and pending-deletion window length.
4. Assess blast radius - enumerate ALL resources encrypted by this key: OBS objects (SSE), ECS disk encryption, database CMK encryption, CSMS secrets, DBSS-encrypted data.
5. Require rollback path - document the cancel-pending-deletion action (available only within the pending window); after window expires there is no rollback.
6. Get explicit written confirmation - require the operator to state key ID, window length, enumerated encrypted resources, and MLPS classification before proceeding.

Pre-Flight Checklist

Before scheduling any KMS key for deletion, verify all of the following:

1. Key identity confirmed - confirm key ID, alias, key type (symmetric/asymmetric), and current status.
2. Pending deletion window reviewed - confirm the window length (minimum 7 days, maximum 1096 days); longer windows provide more recovery time.
3. Encrypted resource enumeration complete - list all OBS buckets using this key for SSE, all ECS instances with disk encryption using this key, all GaussDB/RDS instances with CMK encryption, all CSMS secrets encrypted by this key, all DBSS-encrypted databases.
4. MLPS Level 3 classification checked - determine if any encrypted resource is subject to MLPS Level 3; if yes, key deletion constituting data destruction triggers mandatory 24-hour incident reporting.
5. Cancel-pending-deletion procedure documented - confirm the operator knows how to cancel pending deletion within the window (DEW console > Keys > Cancel Pending Deletion).
6. Approval documented - obtain explicit written operator approval including key ID, window, and MLPS obligation acknowledgment.

Required Confirmation

The operator must explicitly state all of the following before key deletion is scheduled:

• "I confirm the target key is <KEY_ID> (<KEY_ALIAS>) in account <ACCOUNT_ID>, enterprise project <ENTERPRISE_PROJECT>."
• "I confirm the pending deletion window is <DAYS> days and I understand the key is permanently destroyed after this window."
• "I have enumerated all resources encrypted by this key: <LIST_ENCRYPTED_RESOURCES>."
• "I confirm all enumerated resources have been migrated to a new key or decommissioned."
• "I confirm this key [IS / IS NOT] subject to MLPS Level 3 classification."
• "I approve scheduling this key for deletion."

For MLPS Level 3 classified keys, additionally require:

• "I confirm that this key deletion constitutes data destruction and I will file the mandatory incident report within 24 hours."

Rollback Procedure

• Within pending-deletion window (reversible): DEW console > Keys > select key > Cancel Pending Deletion - key returns to Enabled or Disabled state.
• After window expires (irreversible): no recovery path. All data encrypted by this key is permanently inaccessible.
• Document the cancel-pending-deletion deadline prominently in the change ticket.

Post-Action Verification

1. Confirm key status shows Pending Deletion with the correct deletion date.
2. Verify the pending-deletion window matches the approved window length.
3. Test access to a sample encrypted resource to confirm it is still accessible within the window.
4. If MLPS Level 3 data destruction: initiate incident report process within 24 hours.

Response Shape

1. Key identity confirmed
2. Pending deletion window and expiry date
3. Encrypted resource enumeration
4. MLPS Level 3 classification
5. Blast radius summary
6. Rollback window deadline
7. Approval status
8. Executed action
9. Post-action verification