Example 1: Encrypting or Decrypting Small Volumes of Data

Scenario

Encrypt or decrypt data not larger than 4 KB, such as passwords, certificates, and phone numbers, by using a tool on the console or calling an API. This section describes how to call a KMS API and use a CMK to encrypt or decrypt data.

Operations

Procedure

1. Create a CMK.
   • API information

     URI format: POST /v1.0/{project_id}/kms/create-key

     For details, see Creating a CMK.

     

     Default Master Keys are created by services integrated with KMS. Names of Default Master Keys end with /default. Do not end your CMK names with /default.

   • Example request

     POST: https://{endpoint}/v1.0/53d1aefc533f4ce9a59c26b01667cbcf/kms/create-key

     Obtain {endpoint} from Regions and Endpoints.

     Body:

     {
         "key_alias": "test"
     }

   • Example response

     {
         "key_info": {
             "key_id": "bb6a3d22-dc93-47ac-b5bd-88df7ad35f1e",
             "domain_id": "b168fe00ff56492495a7d22974df2d0b"
         }
     }

2. Encrypt data.
   • API information

     URI format: POST /v1.0/{project_id}/kms/encrypt-data

     For details, see Encrypt data.

   • Example request

     POST https://{endpoint}/v1.0/53d1aefc533f4ce9a59c26b01667cbcf/kms/encrypt-data

     Obtain {endpoint} from Regions and Endpoints.

     You can use the API for Querying the List of CMKs to check key information, including key_id.

     Body:

     {
         "key_id": "0d0466b0-e727-4d9c-b35d-f84bb474a37f",
         "plain_text": "12345678"
     }

   • Example response

     {     "key_id": "0d0466b0-e727-4d9c-b35d-f84bb474a37f",
          "cipher_text": "AgDoAG7EsEc2OHpQxz4gDFDH54CqwaelpTdEl+RFPjbKn5klPTvOywYIeZX60kPbFsYOpXJwkL32HUM50MY22Eb1fOSpZK7WJpYjx66EWOkJvO+Ey3r1dLdNAjrZrYzQlxRwNS05CaNKoX5rr3NoDnmv+UNobaiS25muLLiqOt6UrStaWow9AUyOHSzl+BrX2Vu0whv74djK+3COO6cXT2CBO6WajTJsOgYdxMfv24KWSKw0TqvHe8XDKASQGKdgfI74hzI1YWJlNjlmLWFlMTAtNDRjZC1iYzg3LTFiZGExZGUzYjdkNwAAAACdcfNpLXwDUPH3023MvZK8RPHe129k6VdNIi3zNb0eFQ==" 
     }

3. Decrypt data.
   • API information

     URI format: POST /v1.0/{project_id}/kms/decrypt-data

     For details, see Decrypt data.

   • Example request

     POST https://{endpoint}/v1.0/53d1aefc533f4ce9a59c26b01667cbcf/kms/decrypt-data

     Obtain {endpoint} from Regions and Endpoints.

     You can use the API for Querying the List of CMKs to check key information, including key_id.

     Body:

     {      "cipher_text": "AgDoAG7EsEc2OHpQxz4gDFDH54CqwaelpTdEl+RFPjbKn5klPTvOywYIeZX60kPbFsYOpXJwkL32HUM50MY22Eb1fOSpZK7WJpYjx66EWOkJvO+Ey3r1dLdNAjrZrYzQlxRwNS05CaNKoX5rr3NoDnmv+UNobaiS25muLLiqOt6UrStaWow9AUyOHSzl+BrX2Vu0whv74djK+3COO6cXT2CBO6WajTJsOgYdxMfv24KWSKw0TqvHe8XDKASQGKdgfI74hzI1YWJlNjlmLWFlMTAtNDRjZC1iYzg3LTFiZGExZGUzYjdkNwAAAACdcfNpLXwDUPH3023MvZK8RPHe129k6VdNIi3zNb0eFQ=="
      }

   • Example response

     {   
         "key_id": "0d0466b0-e727-4d9c-b35d-f84bb474a37f",
          "plain_text": "12345678"
      }