Updated on 2024-08-06 GMT+08:00

Encrypt data

Function

This API is used to encrypt data using a specified CMK.

Constraints

If you use an asymmetric key for encryption, record the key ID and encryption algorithm, which are required for decryption. If the specified key ID and encryption algorithm do not match those used for encrypting data, the decryption fails. If you use a symmetric key for decryption, you do not need to provide the key ID and encryption algorithm. KMS stores the information as ciphertext. KMS cannot store metadata in the ciphertext generated using an asymmetric key. A standard asymmetric key ciphertext does not contain configurable fields.

Calling Method

For details, see Calling APIs.

URI

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

Table 1 Path Parameters

Parameter

Mandatory

Type

Description

project_id

Yes

String

Project ID

Request Parameters

Table 2 Request header parameters

Parameter

Mandatory

Type

Description

X-Auth-Token

Yes

String

User token. It can be obtained by calling the IAM API used to obtain a user token. The value of X-Subject-Token in the response header is the user token.

Table 3 Request body parameters

Parameter

Mandatory

Type

Description

key_id

Yes

String

A 36-byte key ID which matches the regular expression ^[0-9a-z]{8}-[0-9a-z]{4}-[0-9a-z]{4}-[0-9a-z]{4}-[0-9a-z]{12}$, for example, 0d0466b0-e727-4d9c-b35d-f84bb474a37f.

plain_text

Yes

String

Plaintext data. It can be 1 to 4,096 bytes and should match the regular expression ^.{1,4096}$. After it is converted to a byte array, its length should still be 1 to 4096 bytes.

encryption_algorithm

No

String

Data encryption algorithm. Specify this parameter if only asymmetric keys are used. The default value is SYMMETRIC_DEFAULT. Possible values are as follows: SYMMETRIC_DEFAULT RSAES_OAEP_SHA_256 SM2_ENCRYPT

sequence

No

String

A 36-byte serial number of a request message, for example, 919c82d4-8046-4722-9094-35c3c6524cff

Response Parameters

Status code: 200

Table 4 Response body parameters

Parameter

Type

Description

key_id

String

Key ID.

cipher_text

String

Encrypted ciphertext in Base64 format

Status code: 400

Table 5 Response body parameters

Parameter

Type

Description

error

Object

Error message.

Table 6 ErrorDetail

Parameter

Type

Description

error_code

String

Error code returned by the error request

error_msg

String

Error information returned by the error request

Status code: 401

Table 7 Response body parameters

Parameter

Type

Description

error

Object

Error message.

Table 8 ErrorDetail

Parameter

Type

Description

error_code

String

Error code returned by the error request

error_msg

String

Error information returned by the error request

Status code: 403

Table 9 Response body parameters

Parameter

Type

Description

error

Object

Error message.

Table 10 ErrorDetail

Parameter

Type

Description

error_code

String

Error code returned by the error request

error_msg

String

Error information returned by the error request

Status code: 404

Table 11 Response body parameters

Parameter

Type

Description

error

Object

Error message.

Table 12 ErrorDetail

Parameter

Type

Description

error_code

String

Error code returned by the error request

error_msg

String

Error information returned by the error request

Status code: 500

Table 13 Response body parameters

Parameter

Type

Description

error

Object

Error message.

Table 14 ErrorDetail

Parameter

Type

Description

error_code

String

Error code returned by the error request

error_msg

String

Error information returned by the error request

Status code: 502

Table 15 Response body parameters

Parameter

Type

Description

error

Object

Error message.

Table 16 ErrorDetail

Parameter

Type

Description

error_code

String

Error code returned by the error request

error_msg

String

Error information returned by the error request

Status code: 504

Table 17 Response body parameters

Parameter

Type

Description

error

Object

Error message.

Table 18 ErrorDetail

Parameter

Type

Description

error_code

String

Error code returned by the error request

error_msg

String

Error information returned by the error request

Example Requests

Encrypt plaintext data hello world using the CMK whose ID is 0d0466b0-e727-4d9c-b35d-f84bb474a37f and the SYMMETRIC_DEFAULT encryption algorithm.

{
  "key_id" : "0d0466b0-e727-4d9c-b35d-f84bb474a37f",
  "plain_text" : "hello world",
  "encryption_algorithm" : "SYMMETRIC_DEFAULT"
}

Example Responses

Status code: 200

Request succeeded.

{
  "key_id" : "bb6a3d22-dc93-47ac-b5bd-88df7ad35f1e",
  "cipher_text" : "AgDoAG7EsEc2OHpQxz4gDFDH54CqwaelpTdEl+RFXXX..."
}

SDK Sample Code

The SDK sample code is as follows.

Encrypt plaintext data hello world using the CMK whose ID is 0d0466b0-e727-4d9c-b35d-f84bb474a37f and the SYMMETRIC_DEFAULT encryption algorithm.

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package com.huaweicloud.sdk.test;

import com.huaweicloud.sdk.core.auth.ICredential;
import com.huaweicloud.sdk.core.auth.BasicCredentials;
import com.huaweicloud.sdk.core.exception.ConnectionException;
import com.huaweicloud.sdk.core.exception.RequestTimeoutException;
import com.huaweicloud.sdk.core.exception.ServiceResponseException;
import com.huaweicloud.sdk.kms.v2.region.KmsRegion;
import com.huaweicloud.sdk.kms.v2.*;
import com.huaweicloud.sdk.kms.v2.model.*;


public class EncryptDataSolution {

    public static void main(String[] args) {
        // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
        // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
        String ak = System.getenv("CLOUD_SDK_AK");
        String sk = System.getenv("CLOUD_SDK_SK");

        ICredential auth = new BasicCredentials()
                .withAk(ak)
                .withSk(sk);

        KmsClient client = KmsClient.newBuilder()
                .withCredential(auth)
                .withRegion(KmsRegion.valueOf("<YOUR REGION>"))
                .build();
        EncryptDataRequest request = new EncryptDataRequest();
        EncryptDataRequestBody body = new EncryptDataRequestBody();
        body.withEncryptionAlgorithm(EncryptDataRequestBody.EncryptionAlgorithmEnum.fromValue("SYMMETRIC_DEFAULT"));
        body.withPlainText("hello world");
        body.withKeyId("0d0466b0-e727-4d9c-b35d-f84bb474a37f");
        request.withBody(body);
        try {
            EncryptDataResponse response = client.encryptData(request);
            System.out.println(response.toString());
        } catch (ConnectionException e) {
            e.printStackTrace();
        } catch (RequestTimeoutException e) {
            e.printStackTrace();
        } catch (ServiceResponseException e) {
            e.printStackTrace();
            System.out.println(e.getHttpStatusCode());
            System.out.println(e.getRequestId());
            System.out.println(e.getErrorCode());
            System.out.println(e.getErrorMsg());
        }
    }
}

Encrypt plaintext data hello world using the CMK whose ID is 0d0466b0-e727-4d9c-b35d-f84bb474a37f and the SYMMETRIC_DEFAULT encryption algorithm.

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# coding: utf-8

import os
from huaweicloudsdkcore.auth.credentials import BasicCredentials
from huaweicloudsdkkms.v2.region.kms_region import KmsRegion
from huaweicloudsdkcore.exceptions import exceptions
from huaweicloudsdkkms.v2 import *

if __name__ == "__main__":
    # The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
    # In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
    ak = os.environ["CLOUD_SDK_AK"]
    sk = os.environ["CLOUD_SDK_SK"]

    credentials = BasicCredentials(ak, sk)

    client = KmsClient.new_builder() \
        .with_credentials(credentials) \
        .with_region(KmsRegion.value_of("<YOUR REGION>")) \
        .build()

    try:
        request = EncryptDataRequest()
        request.body = EncryptDataRequestBody(
            encryption_algorithm="SYMMETRIC_DEFAULT",
            plain_text="hello world",
            key_id="0d0466b0-e727-4d9c-b35d-f84bb474a37f"
        )
        response = client.encrypt_data(request)
        print(response)
    except exceptions.ClientRequestException as e:
        print(e.status_code)
        print(e.request_id)
        print(e.error_code)
        print(e.error_msg)

Encrypt plaintext data hello world using the CMK whose ID is 0d0466b0-e727-4d9c-b35d-f84bb474a37f and the SYMMETRIC_DEFAULT encryption algorithm.

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package main

import (
	"fmt"
	"github.com/huaweicloud/huaweicloud-sdk-go-v3/core/auth/basic"
    kms "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/kms/v2"
	"github.com/huaweicloud/huaweicloud-sdk-go-v3/services/kms/v2/model"
    region "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/kms/v2/region"
)

func main() {
    // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
    // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
    ak := os.Getenv("CLOUD_SDK_AK")
    sk := os.Getenv("CLOUD_SDK_SK")

    auth := basic.NewCredentialsBuilder().
        WithAk(ak).
        WithSk(sk).
        Build()

    client := kms.NewKmsClient(
        kms.KmsClientBuilder().
            WithRegion(region.ValueOf("<YOUR REGION>")).
            WithCredential(auth).
            Build())

    request := &model.EncryptDataRequest{}
	encryptionAlgorithmEncryptDataRequestBody:= model.GetEncryptDataRequestBodyEncryptionAlgorithmEnum().SYMMETRIC_DEFAULT
	request.Body = &model.EncryptDataRequestBody{
		EncryptionAlgorithm: &encryptionAlgorithmEncryptDataRequestBody,
		PlainText: "hello world",
		KeyId: "0d0466b0-e727-4d9c-b35d-f84bb474a37f",
	}
	response, err := client.EncryptData(request)
	if err == nil {
        fmt.Printf("%+v\n", response)
    } else {
        fmt.Println(err)
    }
}

For SDK sample code of more programming languages, see the Sample Code tab in API Explorer. SDK sample code can be automatically generated.

Status Codes

Status Code

Description

200

Request succeeded.

400

Invalid request parameters.

401

Username and password are required for the requested page.

403

Authentication failed.

404

The resource does not exist.

500

Internal service error.

502

Failed to complete the request. The server receives an invalid response from the upstream server.

504

Gateway timed out.

Error Codes

See Error Codes.