# 重加密 - ReEncrypt #### 功能介绍 将密文使用源密钥解密后，再使用指定的新密钥加密。 能将CreateDatakey，CreateDatakeyWithoutPlainText,EncryptDatakey加密的数据密钥密文重新加密成新的数据密钥密文。 能将EncryptData加密的密文重新加密成新的密文。 注意： 数据密钥只会被重加密成数据密钥 #### 调用方法 请参见[如何调用API](https://support.huaweicloud.com/api-dew/dew_02_0002.html)。 #### 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](https://support.huaweicloud.com/api-dew/dew_02_0308.html)。 - 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:reEncryptFrom | Write | KeyId \* | - kms:KeyOrigin - kms:KeySpec - kms:KeyUsage - kms:DefaultKey - kms:MultiRegionKeyType - g:EnterpriseProjectId - g:ResourceTag/\ | - | kms:cmk:reEncryptTo | | kms:cmk:reEncryptFrom | Write | - | - kms:EncryptionAlgorithm - kms:RequestAlias - kms:ResourceAliases - kms:EncryptionContext | - | kms:cmk:reEncryptTo | #### URI POST /v1.0/{project_id}/kms/re-encrypt 表1路径参数 | 参数 | 是否必选 | 参数类型 | 描述 | |:---|:---|:---|:---| | project_id | 是 | String | **参数解释：** 项目ID，用于唯一标识用户项目。可参考[获取项目ID](https://support.huaweicloud.com/api-dew/dew_02_0009.html)获取，以IAM服务接口返回值为准 **约束限制：** 不涉及 **取值范围：** 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 | 是 | 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），以IAM服务查询用户Token接口为准 **约束限制：** 不涉及 **取值范围：** 不涉及 **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 | |:---|:---|:---|:---| | source_key_id | 否 | String | **参数解释：** 原密钥ID，用于解密密文。对于非对称密钥加密的密文source_key_id必填。对于对称密钥加密的密文，推荐填写source_key_id。kms会优先使用您填写的source_key_id进行解密。不填时会尝试从密文中解析出加密时使用的密钥ID进行解密。 **约束限制：** 不涉及 **取值范围：** 不涉及 **默认取值：** 不涉及 | | source_additional_authenticated_data | 否 | String | **参数解释：** 加密原密文时使用的附加信息。如果加密时，没指定aad，则不能填写，否则会造成解密失败 **约束限制：** 不涉及 **取值范围：** 不涉及 **默认取值：** 不涉及 | | source_encryption_algorithm | 否 | String | **参数解释：** 加密原密文时使用的加密算法 **约束限制：** 注意：RSAES_OAEP_SHA_1已不再安全，请谨慎使用 **取值范围：** - SYMMETRIC_DEFAULT - RSAES_OAEP_SHA_1 - RSAES_OAEP_SHA_256 - SM2_ENCRYPT **默认取值：** SYMMETRIC_DEFAULT | | destination_key_id | 是 | String | **参数解释：** 目的密钥ID,用于加密解密后的明文 **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 | | destination_additional_authenticated_data | 否 | String | **参数解释：** 如果指定了值，会在重加密时，作为aad参与计算 **约束限制：** 不涉及 **取值范围：** 不涉及 **默认取值：** 不涉及 | | destination_encryption_algorithm | 否 | String | **参数解释：** 重加密新密文时使用的加密算法 **约束限制：** 注意：RSAES_OAEP_SHA_1已不再安全，请谨慎使用 **取值范围：** - SYMMETRIC_DEFAULT - RSAES_OAEP_SHA_1 - RSAES_OAEP_SHA_256 - SM2_ENCRYPT **默认取值：** SYMMETRIC_DEFAULT | | datakey_cipher_length | 否 | String | **参数解释：** 当密文是CBC模式加密的数据密钥时，需要指定datakey_cipher_length。表示明文密钥材料的字节数 **约束限制：** 不涉及 **取值范围：** 不涉及 **默认取值：** 不涉及 | | cipher_text | 是 | String | **参数解释：** 需要进行重加密的密文 **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：** 重新加密时使用的密钥ID **取值范围：** 不涉及 | | source_key_id | String | **参数解释：** 加密原密文时使用的密钥ID **取值范围：** 不涉及 | | source_encryption_algorithm | String | **参数解释：** 原密文加密时使用的加密算法 **取值范围：** 不涉及 | | destination_encryption_algorithm | String | **参数解释：** 重新加密时使用的加密算法 **取值范围：** 不涉及 | | cipher_text | String | **参数解释：** 重新加密后的密文 **取值范围：** 不涉及 | #### 请求示例 ``` https://kms.cn-north-4.myhuaweicloud.com/v1.0/d4e559b49b3b403da5279723299ed4a6/kms/re-encrypt { "source_key_id" : "054faae3-ffc2-4b23-8d94-c05bfc8f596a", "source_additional_authenticated_data" : "", "source_encryption_algorithm" : "SYMMETRIC_DEFAULT", "destination_key_id" : "8ad47b5b-037e-4ff9-bf04-6900e3213c17", "destination_additional_authenticated_data" : "123", "destination_encryption_algorithm" : "SYMMETRIC_DEFAULT", "datakey_cipher_length" : "32", "cipher_text" : "020078000871efb21bfdc0712becf0dabfcc115a25eae06efb652aa9afa9689a4c4ec46b4bbeb3a902369b1a53eab67e9b8e730ced3879d1fb62c27cc314f2a44943687741a5d250403c861e4410936d422ef2d330353466616165332d666663322d346232332d386439342d63303562666338663539366100000000ed7fb70234ac273dedc19752900c6f7e4577fc2c1f1482539d0142ab0ff9fdda" } ``` #### 响应示例 无 #### SDK代码示例 SDK代码示例如下。 - [Java] ``` 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 ReEncryptSolution { 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("")) .build(); ReEncryptRequest request = new ReEncryptRequest(); ReEncryptRequestBody body = new ReEncryptRequestBody(); body.withCipherText("020078000871efb21bfdc0712becf0dabfcc115a25eae06efb652aa9afa9689a4c4ec46b4bbeb3a902369b1a53eab67e9b8e730ced3879d1fb62c27cc314f2a44943687741a5d250403c861e4410936d422ef2d330353466616165332d666663322d346232332d386439342d63303562666338663539366100000000ed7fb70234ac273dedc19752900c6f7e4577fc2c1f1482539d0142ab0ff9fdda"); body.withDatakeyCipherLength("32"); body.withDestinationEncryptionAlgorithm("SYMMETRIC_DEFAULT"); body.withDestinationAdditionalAuthenticatedData("123"); body.withDestinationKeyId("8ad47b5b-037e-4ff9-bf04-6900e3213c17"); body.withSourceEncryptionAlgorithm("SYMMETRIC_DEFAULT"); body.withSourceAdditionalAuthenticatedData(""); body.withSourceKeyId("054faae3-ffc2-4b23-8d94-c05bfc8f596a"); request.withBody(body); try { ReEncryptResponse response = client.reEncrypt(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()); } } } ``` - [Python] ``` # 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("")) \ .build() try: request = ReEncryptRequest() request.body = ReEncryptRequestBody( cipher_text="020078000871efb21bfdc0712becf0dabfcc115a25eae06efb652aa9afa9689a4c4ec46b4bbeb3a902369b1a53eab67e9b8e730ced3879d1fb62c27cc314f2a44943687741a5d250403c861e4410936d422ef2d330353466616165332d666663322d346232332d386439342d63303562666338663539366100000000ed7fb70234ac273dedc19752900c6f7e4577fc2c1f1482539d0142ab0ff9fdda", datakey_cipher_length="32", destination_encryption_algorithm="SYMMETRIC_DEFAULT", destination_additional_authenticated_data="123", destination_key_id="8ad47b5b-037e-4ff9-bf04-6900e3213c17", source_encryption_algorithm="SYMMETRIC_DEFAULT", source_additional_authenticated_data="", source_key_id="054faae3-ffc2-4b23-8d94-c05bfc8f596a" ) response = client.re_encrypt(request) print(response) except exceptions.ClientRequestException as e: print(e.status_code) print(e.request_id) print(e.error_code) print(e.error_msg) ``` - [Go] ``` 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("")). WithCredential(auth). SafeBuild() if err != nil { fmt.Println(err) return } client := kms.NewKmsClient(hcClient) request := &model.ReEncryptRequest{} datakeyCipherLengthReEncryptRequestBody:= "32" destinationEncryptionAlgorithmReEncryptRequestBody:= "SYMMETRIC_DEFAULT" destinationAdditionalAuthenticatedDataReEncryptRequestBody:= "123" sourceEncryptionAlgorithmReEncryptRequestBody:= "SYMMETRIC_DEFAULT" sourceAdditionalAuthenticatedDataReEncryptRequestBody:= "" sourceKeyIdReEncryptRequestBody:= "054faae3-ffc2-4b23-8d94-c05bfc8f596a" request.Body = &model.ReEncryptRequestBody{ CipherText: "020078000871efb21bfdc0712becf0dabfcc115a25eae06efb652aa9afa9689a4c4ec46b4bbeb3a902369b1a53eab67e9b8e730ced3879d1fb62c27cc314f2a44943687741a5d250403c861e4410936d422ef2d330353466616165332d666663322d346232332d386439342d63303562666338663539366100000000ed7fb70234ac273dedc19752900c6f7e4577fc2c1f1482539d0142ab0ff9fdda", DatakeyCipherLength: &datakeyCipherLengthReEncryptRequestBody, DestinationEncryptionAlgorithm: &destinationEncryptionAlgorithmReEncryptRequestBody, DestinationAdditionalAuthenticatedData: &destinationAdditionalAuthenticatedDataReEncryptRequestBody, DestinationKeyId: "8ad47b5b-037e-4ff9-bf04-6900e3213c17", SourceEncryptionAlgorithm: &sourceEncryptionAlgorithmReEncryptRequestBody, SourceAdditionalAuthenticatedData: &sourceAdditionalAuthenticatedDataReEncryptRequestBody, SourceKeyId: &sourceKeyIdReEncryptRequestBody, } response, err := client.ReEncrypt(request) if err == nil { fmt.Printf("%+v\n", response) } else { fmt.Println(err) } } ``` - [更多] 更多编程语言的SDK代码示例，请参见[API Explorer](https://console.huaweicloud.com/apiexplorer/#/openapi/KMS/sdk?api=ReEncrypt)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](https://support.huaweicloud.com/api-dew/ErrorCode.html)。