Retrieving a key

You can retrieve the key material for a key by using IBM® Key Protect for IBM Cloud®.

If you have a Writer or Manager access policy, you can retrieve the contents of a standard key, such as its key material and policy details.

Root keysA symmetric wrapping key that is used for encrypting and decrypting other keys that are stored in a data service. stay within the bounds of a hardware security module. The key material for a root key cannot be retrieved.

Retrieving a key with the API

To view detailed information about a specific key, you can make a GET call to the following endpoint.

https://<region>.kms.cloud.ibm.com/api/v2/keys/<key_ID_or_alias>

Retrieve your service and authentication credentials to work with keys in the service.
Retrieve the ID of the key that you would like to access or manage.

The ID value is used to access detailed information about the key, such as the key material itself. You can retrieve the ID for a specified key by making a GET /v2/keys request, or by accessing the Key Protect GUI.

Run the following curl command to get details about your key and the key material.

$ curl -X GET \
    "https://<region>.kms.cloud.ibm.com/api/v2/keys/<key_ID_or_alias>" \
    -H "accept: application/vnd.ibm.kms.key+json" \
    -H "authorization: Bearer <IAM_token>" \
    -H "bluemix-instance: <instance_ID>" \
    -H "x-kms-key-ring: <key_ring_ID>" \
    -H "correlation-id: <correlation_ID>"

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

Table 1. Describes the variables that are needed to view a specified key with the Key Protect API.
Variable	Description
region	Required. The region abbreviation, such as `us-south` or `eu-gb`, that represents the geographic area where your Key Protect instance resides. For more information, see Regional service endpoints.
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 Key Protect service instance. For more information, see Retrieving an instance ID.
key_ring_ID	Optional. The unique identifier of the key ring that the key is a part of. If unspecified, Key Protect will search for the key in every key ring associated with the specified instance. It is recommended to specify the key ring ID for a more optimized request. Note: The key ring ID of keys that are created without an `x-kms-key-ring` header is: default. For more information, see Grouping keys.
correlation_ID	Optional.The unique identifier that is used to track and correlate transactions.
key_ID_or_alias	Required. The identifier or alias for the key that you want to retrieve.

A successful GET api/v2/keys/<key_ID_or_alias> response returns details about your key and the key material. The following JSON object shows an example returned value for a standard key.

{
    "metadata": {
        "collectionType": "application/vnd.ibm.kms.key+json",
        "collectionTotal": 1
    },
    "resources": [
        {
            "type": "application/vnd.ibm.kms.key+json",
            "id": "02fd6835-6001-4482-a892-13bd2085f75d",
            "name": "test-standard-key",
            "aliases": [
                "alias-1",
                "alias-2"
                ],
            "state": 1,
            "expirationDate": "2020-03-15T03:50:12Z",
            "extractable": true,
            "crn": "crn:v1:bluemix:public:kms:us-south:a/f047b55a3362ac06afad8a3f2f5586ea:12e8c9c2-a162-472d-b7d6-8b9a86b815a6:key:02fd6835-6001-4482-a892-13bd2085f75d",
            "imported": false,
            "creationDate": "2020-03-12T03:50:12Z",
            "createdBy": "...",
            "algorithmType": "Deprecated",
            "algorithmMetadata": {
                "bitLength": "256",
                "mode": "Deprecated"
            },
            "algorithmBitSize": 256,
            "algorithmMode": "Deprecated",
            "lastUpdateDate": "2020-03-12T03:50:12Z",
            "dualAuthDelete": {
                "enabled": false
            },
            "deleted": false,
            "payload": "Rm91ciBzY29yZSBhbmQgc2V2ZW4geWVhcnMgYWdv..."
        }
    ]
}

The following JSON object shows an example returned value for a root key.

{
    "metadata": {
        "collectionType": "application/vnd.ibm.kms.key+json",
        "collectionTotal": 1
    },
    "resources": [
        {
            "type": "application/vnd.ibm.kms.key+json",
            "id": "2291e4ae-a14c-4af9-88f0-27c0cb2739e2",
            "aliases": [
                "alias-1",
                "alias-2"
            ],
            "name": "test-root-key",
            "state": 1,
            "extractable": false,
            "crn": "crn:v1:bluemix:public:kms:us-south:a/f047b55a3362ac06afad8a3f2f5586ea:30372f20-d9f1-40b3-b486-a709e1932c9c:key:2291e4ae-a14c-4af9-88f0-27c0cb2739e2",
            "imported": false,
            "creationDate": "2020-03-05T16:28:38Z",
            "createdBy": "...",
            "algorithmType": "Deprecated",
            "algorithmMetadata": {
                "bitLength": "256",
                "mode": "Deprecated"
            },
            "algorithmBitSize": 256,
            "algorithmMode": "Deprecated",
            "lastUpdateDate": "2020-03-05T16:39:25Z",
            "keyVersion": {
                "id": "436901cb-f4e4-45f4-bd65-91a7f6d13461",
                "creationDate": "2020-03-05T16:39:25Z"
            },
            "dualAuthDelete": {
                "enabled": false
            },
            "deleted": false
        }
    ]
}

The payload or key material for a root key stays within the bounds of a hardware security module and cannot be retrieved.

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