更新时间:2026-05-20 GMT+08:00
分享

解密数据 - DecryptData

功能介绍

  • 功能介绍:解密数据。

接口约束

  • 解密非对称密钥加密的数据时,需要指定密钥ID和加密算法。如果指定的密钥和加密算法与用于加密数据的值不匹配,解密操作将失败。

调用方法

请参见如何调用API

授权信息

账号具备所有API的调用权限,如果使用账号下的IAM用户调用当前API,该IAM用户需具备调用API所需的权限。

  • 如果使用角色与策略授权,具体权限要求请参见权限和授权项
  • 如果使用身份策略授权,需具备如下身份策略权限。

    授权项

    访问级别

    资源类型(*为必须)

    条件键

    别名

    依赖的授权项

    kms:cmk:decryptData

    Write

    KeyId *

    • kms:KeyOrigin

    • kms:KeySpec

    • kms:KeyUsage

    • kms:MultiRegionKeyType

    • g:EnterpriseProjectId

    • g:ResourceTag/<tag-key>

    • kms:cmk:crypto
    • kms:cmk:decrypt

    -

    -

    • kms:EncryptionAlgorithm

    • kms:RecipientAttestation

    • kms:RequestAlias

    • kms:ResourceAliases

    • kms:EncryptionContext

URI

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

表1 路径参数

参数

是否必选

参数类型

描述

project_id

String

参数解释:

项目ID。可参考获取项目ID获取。

约束限制:

不涉及

取值范围:

以IAM服务接口返回值为准,字符长度32-32。

默认取值:

不涉及

请求参数

表2 请求Header参数

参数

是否必选

参数类型

描述

X-Auth-Token

String

参数解释:

用户Token。 通过调用IAM服务查询用户Token接口获取(响应消息头中X-Subject-Token的值)。

约束限制:

不涉及

取值范围:

IAM服务查询用户Token接口为准

默认取值:

不涉及

表3 请求Body参数

参数

是否必选

参数类型

描述

cipher_text

String

参数解释:

被加密数据密文

约束限制:

  • 取值为加密数据结果中的cipher_text的值

  • 满足正则匹配“^[0-9a-zA-Z+/=]{128,5648}$”

取值范围:

不涉及

默认取值:

不涉及

encryption_algorithm

String

参数解释:

数据加密算法,仅使用非对称密钥需要指定该参数

约束限制:

不涉及

取值范围:

  • SYMMETRIC_DEFAULT

  • RSAES_OAEP_SHA_256

  • SM2_ENCRYPT

默认取值:

SYMMETRIC_DEFAULT

key_id

String

参数解释:

密钥ID

约束限制:

  • 36字节ID

  • 满足正则匹配“^[0-9a-z]{8}-[0-9a-z]{4}-[0-9a-z]{4}-[0-9a-z]{4}-[0-9a-z]{12}$”

取值范围:

不涉及

默认取值:

不涉及

additional_authenticated_data

String

参数解释:

身份验证的非敏感额外数据

约束限制:

长度不超过128字节

取值范围:

任意字符串

默认取值:

不涉及

sequence

String

参数解释:

请求消息序列号,36字节序列号,例如:919c82d4-8046-4722-9094-35c3c6524cff

约束限制:

不涉及

取值范围:

不涉及

默认取值:

不涉及

响应参数

状态码:200

表4 响应Body参数

参数

参数类型

描述

key_id

String

参数解释:

密钥ID

取值范围:

不涉及

plain_text

String

参数解释:

数据明文

取值范围:

不涉及

plain_text_base64

String

参数解释:

明文的Base64值,在非对称加密场景下,若加密的明文中含有不可见字符,则解密结果以该值为准

取值范围:

不涉及

请求示例

解密密文“AgDoAG7EsEc2OHpQxz4gDFDH54Cqwaelxxxxxxx“,数据加密算法为”SYMMETRIC_DEFAULT“,附加数据为“123aad”。

{
  "cipher_text" : "AgDoAG7EsEc2OHpQxz4gDFDH54Cqwaelxxxxxxx",
  "encryption_algorithm" : "SYMMETRIC_DEFAULT",
  "additional_authenticated_data" : "123aad"
}

响应示例

状态码:200

请求已成功

{
  "key_id" : "bb6a3d22-dc93-47ac-b5bd-88df7ad35f1e",
  "plain_text" : "hello world",
  "plain_text_base64" : "aGVsbG8gd29ybGQ="
}

SDK代码示例

SDK代码示例如下。

解密密文“AgDoAG7EsEc2OHpQxz4gDFDH54Cqwaelxxxxxxx“,数据加密算法为”SYMMETRIC_DEFAULT“,附加数据为“123aad”。

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
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 DecryptDataSolution {

    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");
        String projectId = "{project_id}";

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

        KmsClient client = KmsClient.newBuilder()
                .withCredential(auth)
                .withRegion(KmsRegion.valueOf("<YOUR REGION>"))
                .build();
        DecryptDataRequest request = new DecryptDataRequest();
        DecryptDataRequestBody body = new DecryptDataRequestBody();
        body.withAdditionalAuthenticatedData("123aad");
        body.withEncryptionAlgorithm(DecryptDataRequestBody.EncryptionAlgorithmEnum.fromValue("SYMMETRIC_DEFAULT"));
        body.withCipherText("AgDoAG7EsEc2OHpQxz4gDFDH54Cqwaelxxxxxxx");
        request.withBody(body);
        try {
            DecryptDataResponse response = client.decryptData(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());
        }
    }
}

解密密文“AgDoAG7EsEc2OHpQxz4gDFDH54Cqwaelxxxxxxx“,数据加密算法为”SYMMETRIC_DEFAULT“,附加数据为“123aad”。

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
# 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"]
    projectId = "{project_id}"

    credentials = BasicCredentials(ak, sk, projectId)

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

    try:
        request = DecryptDataRequest()
        request.body = DecryptDataRequestBody(
            additional_authenticated_data="123aad",
            encryption_algorithm="SYMMETRIC_DEFAULT",
            cipher_text="AgDoAG7EsEc2OHpQxz4gDFDH54Cqwaelxxxxxxx"
        )
        response = client.decrypt_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)

解密密文“AgDoAG7EsEc2OHpQxz4gDFDH54Cqwaelxxxxxxx“,数据加密算法为”SYMMETRIC_DEFAULT“,附加数据为“123aad”。

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
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")
    projectId := "{project_id}"

    auth, err := basic.NewCredentialsBuilder().
        WithAk(ak).
        WithSk(sk).
        WithProjectId(projectId).
        SafeBuild()

    if err != nil {
        fmt.Println(err)
        return
    }

    hcClient, err := kms.KmsClientBuilder().
         WithRegion(region.ValueOf("<YOUR REGION>")).
         WithCredential(auth).
         SafeBuild()


    if err != nil {
        fmt.Println(err)
        return
    }

    client := kms.NewKmsClient(hcClient)

    request := &model.DecryptDataRequest{}
	additionalAuthenticatedDataDecryptDataRequestBody:= "123aad"
	encryptionAlgorithmDecryptDataRequestBody:= model.GetDecryptDataRequestBodyEncryptionAlgorithmEnum().SYMMETRIC_DEFAULT
	request.Body = &model.DecryptDataRequestBody{
		AdditionalAuthenticatedData: &additionalAuthenticatedDataDecryptDataRequestBody,
		EncryptionAlgorithm: &encryptionAlgorithmDecryptDataRequestBody,
		CipherText: "AgDoAG7EsEc2OHpQxz4gDFDH54Cqwaelxxxxxxx",
	}
	response, err := client.DecryptData(request)
	if err == nil {
        fmt.Printf("%+v\n", response)
    } else {
        fmt.Println(err)
    }
}

更多编程语言的SDK代码示例,请参见API Explorer的代码示例页签,可生成自动对应的SDK代码示例。

状态码

状态码

描述

200

请求已成功

错误码

请参见错误码

相关文档