Managing key aliases

You can use Hyper Protect Crypto Services to manage key aliases with the Hyper Protect Crypto Services API.

Key aliases are unique human-readable names that can be used to identify a key. Aliases enable your service to refer to a key by recognizable custom names, rather than the auto-generated identifier provided by Hyper Protect Crypto Services. Assume that you create a key that has the ID 02fd6835-6001-4482-a892-13bd2085f75d and it is aliased as US-South-Test-Key. You can use US-South-Test-Key to refer to your key when you make calls to the Hyper Protect Crypto Services API to retrieve a key.

Before you manage key alias for keys in Hyper Protect Crypto Services, keep in mind the following considerations:

An alias is independent from a key.

An alias is its own resource and any actions that are taken on it do not affect the associated key. For example, deleting an alias does not delete the associated key.
An alias can be associated with only one key at a time.

An alias can be associated with only one key that is located in the same instance and region. If you want to change the key that the alias is associated with, you need to perform the following steps:
1. Delete the alias.
2. Wait up to 10 minutes.
3. Re-create the alias and map it to the key.
You can create an alias with the same name in a different instance or region.

Each alias is associated with a different key in each instance or region, with which, your service's application code can be reusable in different instances or regions. For example, if you name an alias Application Key in both the us-south and us-east regions, with each linked to a different key.

Creating key aliases

To create a key alias for a key, you can use either the UI or the key management service API.

Each key can have up to five aliases. It is limited to 1,000 aliases per instance.

Creating key alias with the UI

Create a key alias with the UI by completing the following steps:

Log in to the UI.
Go to Menu > Resource list to view a list of your resources.
From your IBM Cloud resource list, select your provisioned instance of Hyper Protect Crypto Services.
Select the KMS keys tab in the side menu and find the key that you want to create key aliases for.
Click the Actions icon to open the list of options for the key and click Edit key aliases.
Enter key aliases separated by a comma. You can add up to five aliases for a key.

Each alias must be alphanumeric, case-sensitive, and cannot contain spaces or special characters other than dashes (-) or underscores (_). The alias cannot be a version 4 UUID and must not be a Hyper Protect Crypto Services reserved name: allowed_ip, key, keys, metadata, policy, policies, registration, registrations, ring, rings, rotate, wrap, unwrap, rewrap, version, versions. Alias size can be 2 - 90 characters (inclusive).
Click Save.

Creating key aliases with the API

Create a key alias by making a POST call to the following endpoint.

https://<instance_ID>.api.<region>.hs-crypto.appdomain.cloud/api/v2/keys/<key_ID>/aliases/<alias>

Retrieve your authentication credentials to work with keys in the service.

To create a key alias, you must be assigned a Manager or Writer service access role. To learn how IAM roles map to Hyper Protect Crypto Services service actions, check out Service access roles.

Create a key alias by running the following curl command.

$ curl -X POST \
    "https://<instance_ID>.api.<region>.hs-crypto.appdomain.cloud/api/v2/keys/<key_ID>/aliases/<key_alias>" \
    -H "authorization: Bearer <IAM_token>" \
    -H "bluemix-instance: <instance_ID>" \
    -H "content-type: application/vnd.ibm.kms.key+json" \
    -H "correlation-id: <correlation_ID>"

Replace the variables in the example request according to the following table.

Table 1. Describes the variables needed to create a key alias with the Hyper Protect Crypto Services API
Variable	Description
`region`	Required. The region abbreviation, such as `us-south`, that represents the geographic area where your Hyper Protect Crypto Services instance resides. For more information, see Regional service endpoints.
`port`	Required. The port number of the API endpoint.
`key_ID`	Required. The identifier for the key that you would like to associate with an alias. To retrieve a key ID, see the list keys API.
`key_alias`	Required. A unique, human-readable name for easy identification of your key. Each alias must be alphanumeric, case-sensitive, and cannot contain spaces or special characters other than dashes (-) or underscores (_). The alias cannot be a version 4 UUID and must not be a Hyper Protect Crypto Services reserved name: `allowed_ip`, `key`, `keys`, `metadata`, `policy`, `policies`, `registration`, `registrations`, `ring`, `rings`, `rotate`, `wrap`, `unwrap`, `rewrap`, `version`, `versions`. Alias size can be 2 - 90 characters (inclusive). Note: You cannot have duplicate alias names in your Hyper Protect Crypto Services instance.
`IAM_token`	Required. Your IBM Cloud access token. Include the full contents of the `IAM` token, including the Bearer value, in the `curl` request. For more information, see Retrieving an access token.
`instance_ID`	Required. The unique identifier that is assigned to your Hyper Protect Crypto Services service instance. For more information, see Retrieving an instance ID.
`correlation_ID`	The unique identifier that is used to track and correlate transactions.

To protect the confidentiality of your personal data, avoid entering personally identifiable information (PII), such as your name or location, when you create a key alias. For more examples of PII, see section 2.2 of the NIST Special Publication 800-122.

A successful POST api/v2/keys/<key_ID>/aliases/<key_alias> response returns the alias for your key, along with other metadata. The alias is a unique name that is assigned to your key and can be used for to retrieve more information about the associated key.

{
    "metadata": {
        "collectionType": "application/vnd.ibm.kms.key+json",
        "collectionTotal": 1
    },
    "resources": [
        {
            "keyId": "02fd6835-6001-4482-a892-13bd2085f75d",
            "alias": "test-alias",
            "creationDate": "2020-03-12T03:37:32Z",
            "createdBy": "..."
        }
    ]
}

For a detailed description of the response parameters, see the Hyper Protect Crypto Services REST API reference doc.

Deleting key aliases

To remove a key alias for a key, you can use either the UI or the key management service API.

Deleting key aliases with the UI

Delete a key alias with the UI by completing the following steps:

Log in to the UI.
Go to Menu > Resource list to view a list of your resources.
From your IBM Cloud resource list, select your provisioned instance of Hyper Protect Crypto Services.
Select the KMS keys tab in the side menu and find the key that you want to create key aliases for.
Click the Actions icon to open the list of options for the key and click Edit key aliases.
Delete the key alias that you want to remove and click Save.

Deleting key aliases with the API

Delete a key alias by making a DELETE call to the following endpoint.

https://<instance_ID>.api.<region>.hs-crypto.appdomain.cloud/api/v2/keys/<key_ID>/aliases/<alias>

Retrieve your authentication credentials to work with keys in the service.

Delete a key alias by running the following curl command.

$ curl -X DELETE \
    "https://<instance_ID>.api.<region>.hs-crypto.appdomain.cloud/api/v2/keys/<key_ID>/aliases/<key_alias>" \
    -H "authorization: Bearer <IAM_token>" \
    -H "bluemix-instance: <instance_ID>" \
    -H "content-type: application/vnd.ibm.kms.key+json" \
    -H "correlation-id: <correlation_ID>"

Replace the variables in the example request according to the following table.

Table 2. Describes the variables needed to delete a key alias with the Hyper Protect Crypto Services API
Variable	Description
`region`	Required. The region abbreviation, such as `us-south`, that represents the geographic area where your Hyper Protect Crypto Services instance resides. For more information, see Regional service endpoints.
`port`	Required. The port number of the API endpoint.
`key_ID`	Required. The unique identifier for the key.
`key_alias`	Required. The unique, human-readable name that identifies your key.
`IAM_token`	Required. Your IBM Cloud access token. Include the full contents of the `IAM` token, including the Bearer value, in the `curl` request. For more information, see Retrieving an access token.
`instance_ID`	Required. The unique identifier that is assigned to your Hyper Protect Crypto Services service instance. For more information, see Retrieving an instance ID.
`correlation_ID`	The unique identifier that is used to track and correlate transactions.

A successful DELETE api/v2/keys/<key_ID>/aliases/<key_alias> request returns an HTTP 204 No Content response, which indicates that the alias associated with your key was deleted.

It takes up to 10 minutes for an alias to be deleted from the service.

APIs that use key alias

The following table lists the APIs where you can use key alias.

Table 3. Describes the variables that are APIs that use key alias.
API	Key Alias Impact
Create Root Keys.	You can create up to five aliases while you create a root key.
Create Standard Keys.	You can create up to five aliases while you create a standard key.
Retrieve a key.	You can retrieve a key by ID or alias.
View key metadata	You can retrieve the metadata of a key by ID or alias.