Decrypt data
Function
This API is used to decrypt data.
Constraints
When decrypting the data encrypted using asymmetric keys, you need to specify the key ID and encryption algorithm. If the specified key ID and encryption algorithm do not match those used for encrypting data, the decryption fails.
Calling Method
For details, see Calling APIs.
URI
POST /v1.0/{project_id}/kms/decrypt-data
Parameter |
Mandatory |
Type |
Description |
---|---|---|---|
project_id |
Yes |
String |
Project ID |
Request Parameters
Parameter |
Mandatory |
Type |
Description |
---|---|---|---|
X-Auth-Token |
Yes |
String |
User token. It can be obtained by calling an IAM API used to obtain a user token. The value of X-Subject-Token in the response header is the user token. |
Parameter |
Mandatory |
Type |
Description |
---|---|---|---|
cipher_text |
Yes |
String |
Ciphertext of encrypted data, which is the value of cipher_text in the data encryption output. The value matches the regular expression ^[0-9a-zA-Z+/=]{128,5648}$. |
encryption_algorithm |
No |
String |
Data encryption algorithm. Specify this parameter if only asymmetric keys are used. The default value is SYMMETRIC_DEFAULT. Possible values are as follows: SYMMETRIC_DEFAULT RSAES_OAEP_SHA_256 SM2_ENCRYPT |
key_id |
No |
String |
A 36-byte key ID which matches the regular expression ^[0-9a-z]{8}-[0-9a-z]{4}-[0-9a-z]{4}-[0-9a-z]{4}-[0-9a-z]{12}$, for example, 0d0466b0-e727-4d9c-b35d-f84bb474a37f. |
sequence |
No |
String |
A 36-byte serial number of a request message, for example, 919c82d4-8046-4722-9094-35c3c6524cff |
Response Parameters
Status code: 200
Parameter |
Type |
Description |
---|---|---|
key_id |
String |
Key ID. |
plain_text |
String |
Plaintext. |
plain_text_base64 |
String |
Base64 value of the plaintext. In asymmetric encryption scenarios, if the encrypted plaintext contains invisible characters, the value is used as the decryption result. |
Status code: 400
Parameter |
Type |
Description |
---|---|---|
error |
Object |
Error message. |
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
Parameter |
Type |
Description |
---|---|---|
error |
Object |
Error message. |
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
Parameter |
Type |
Description |
---|---|---|
error |
Object |
Error message. |
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
Parameter |
Type |
Description |
---|---|---|
error |
Object |
Error message. |
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
Parameter |
Type |
Description |
---|---|---|
error |
Object |
Error message. |
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
Parameter |
Type |
Description |
---|---|---|
error |
Object |
Error message. |
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
Parameter |
Type |
Description |
---|---|---|
error |
Object |
Error message. |
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
Decrypt ciphertext AgDoAG7EsEc2OHpQxz4gDFDH54Cqwaelxxxxxxx that was encrypted using the SYMMETRIC_DEFAULT algorithm.
{ "cipher_text" : "AgDoAG7EsEc2OHpQxz4gDFDH54Cqwaelxxxxxxx", "encryption_algorithm" : "SYMMETRIC_DEFAULT" }
Example Responses
Status code: 200
Request succeeded.
{ "key_id" : "bb6a3d22-dc93-47ac-b5bd-88df7ad35f1e", "plain_text" : "hello world", "plain_text_base64" : "aGVsbG8gd29ybGQ=" }
SDK Sample Code
The SDK sample code is as follows.
Decrypt ciphertext AgDoAG7EsEc2OHpQxz4gDFDH54Cqwaelxxxxxxx that was encrypted using the SYMMETRIC_DEFAULT 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 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"); ICredential auth = new BasicCredentials() .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.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()); } } } |
Decrypt ciphertext AgDoAG7EsEc2OHpQxz4gDFDH54Cqwaelxxxxxxx that was encrypted using the SYMMETRIC_DEFAULT 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 = DecryptDataRequest() request.body = DecryptDataRequestBody( 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) |
Decrypt ciphertext AgDoAG7EsEc2OHpQxz4gDFDH54Cqwaelxxxxxxx that was encrypted using the SYMMETRIC_DEFAULT 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.DecryptDataRequest{} encryptionAlgorithmDecryptDataRequestBody:= model.GetDecryptDataRequestBodyEncryptionAlgorithmEnum().SYMMETRIC_DEFAULT request.Body = &model.DecryptDataRequestBody{ EncryptionAlgorithm: &encryptionAlgorithmDecryptDataRequestBody, CipherText: "AgDoAG7EsEc2OHpQxz4gDFDH54Cqwaelxxxxxxx", } response, err := client.DecryptData(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.
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