Decrypting Data Using External Keys
Use the post /v1/cckm/oci/ekm/v1/vaults/{vaultId}/keys/{keyId}/decrypt API to decrypt the encrypted data (ciphertext) using a specific version of an OCI external key in the external vault.
Specify the version ID (keyVersionId) of the key as an input parameter.
The input for the decrypt API is the output JSON blob of the
post /v1/cckm/oci/ekm/v1/vaults/{vaultId}/keys/{keyId}/encryptAPI.The decrypt API uses the source key version stored in the metadata during the encrypt operation to decrypt the ciphertext.
The output of the decrypt API contains the base64-encoded plaintext in a JSON blob.
The supported scope value is oci_ekms.
When running the API,
{vaultId}is the resource ID of the external vault on the CipherTrust Data Security Platform Service.{keyId}is the resource ID of the external key on the CipherTrust Data Security Platform Service.
Header
| Parameter | Type | Description |
|---|---|---|
| opc-request-id | String | Unique identifier for the request. If provided, the returned request ID will include this value. Otherwise, a random request ID will be generated by the service. |
Request Parameters
Tip
Refer to the output of the post /v1/cckm/oci/ekm/v1/vaults/{vaultId}/keys/{keyId}/encrypt API for correct values of the input parameters. Refer to Encrypting Data Using External Keys for details.
| Parameter | Type | Description |
|---|---|---|
| ciphertext | string | A byte array that appears as a base64 encoded string in the JSON blob. |
| iv | string | A byte array that appears as a base64 encoded string in the JSON blob. |
| mode | string | Crypto mode used for encryption (for example, CBC, ECB, GCM). |
| pad | string | Padding algorithm, for example, none, pkcs7. |
| tag | string | A byte array that appears as a base64 encoded string in the JSON blob. |
| aad | string | A byte array that appears as a base64 encoded string in the JSON blob. |
| keyVersionId | string | Resource ID of the external key version on the CipherTrust Data Security Platform Service to be used for decryption. |
Example Request
post https://<Host IP Address>/api/v1/cckm/oci/ekm/v1/vaults/{vaultId}/keys/{keyId}/decrypt
<authorization token and other headers>
{
"ciphertext": "RpeAO2op/+bQD3FioKbuVi54yysO79e0SjY=",
"iv": "EYMbIM/MOv5q7Km1",
"mode": "AES_GCM",
"tag": "dk958fIs5D+kRE8rKKqtgA==",
"aad": "fIs5D+kRE8r",
"keyVersionId": "1272f6a0-9377-4e9a-9158-460860716eaf"
}
Example Response
{
"plaintext": "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXo=",
"keyId": "650e330b-47b1-4d9f-ab72-866b4e10df39",
"keyVersionId": "1272f6a0-9377-4e9a-9158-460860716eaf",
"iv": "EYMbIM/MOv5q7Km1",
"mode": "AES_GCM",
"tag": "dk958fIs5D+kRE8rKKqtgA==",
"aad": "fIs5D+kRE8r"
}
Response Codes
| Response Code | Description |
|---|---|
| 200 | Ok |
| 400 | Bad request |
| 401 | Unauthorized |
| 404 | Not found |
| 403 | Forbidden |
| 500 | Internal server error |
Refer to HTTP status codes for details.
