Encrypts data by using an asymmetric key.
Usage notes
This API can be called through either a shared gateway or a dedicated gateway. For more information, see Alibaba Cloud SDK.
Shared gateway: Accesses KMS through public network or VPC domain names, using one of the following formats:
Public network domain names:
kms.<REGION_ID>.aliyuncs.com.VPC domain names:
kms-vpc.<REGION_ID>.aliyuncs.com.
This method requires enabling public network access. For instructions, see Access KMS instance keys over the Internet.
Dedicated gateway: Access KMS through the KMS private network domain names, following the format:
<YOUR_KMS_INSTANCE_ID>.cryptoservice.kms.aliyuncs.com.
QPS Limits
When calling this API through a shared gateway: The API is rate-limited to 750 queries per second (QPS) per Alibaba Cloud account. Exceeding this limit will result in throttling, which may impact your service. We recommend that you take note of the limit when you call this operation.
When calling this API through a dedicated gateway: The API's QPS limit per Alibaba Cloud account is determined by the compute performance specifications of your KMS instances. For more information on the compute performance specifications, see Performance quota.
Description
This operation is supported only for asymmetric keys for which Usage is set to ENCRYPT/DECRYPT. The following table lists the supported encryption algorithms.
KeySpec | Algorithm | Description | Maximum number of bytes that can be encrypted |
RSA_2048 | RSAES_OAEP_SHA_256 | RSAES-OAEP using SHA-256 and MGF1 with SHA-256 | 190 |
RSA_2048 | RSAES_OAEP_SHA_1 | RSAES-OAEP using SHA1 and MGF1 with SHA1 | 214 |
RSA_3072 | RSAES_OAEP_SHA_256 | RSAES-OAEP using SHA-256 and MGF1 with SHA-256 | 318 |
RSA_3072 | RSAES_OAEP_SHA_1 | RSAES-OAEP using SHA1 and MGF1 with SHA1 | 342 |
EC_SM2 | SM2PKE | SM2 public key encryption algorithm based on elliptic curves | 6047 |
In this example, an asymmetric key whose ID is hzz630494463ejqjx****and version ID is 2ab1a983-7072-4bbc-a582-584b5bd8**** and the RSAES_OAEP_SHA_1 encryption algorithm are used to encrypt the SGVsbG8gd29ybGQ= plaintext.
Debugging
Request parameters
Parameter | Type | Required | Example | Description |
Action | String | Yes | AsymmetricEncrypt | The operation that you want to perform. Set the value to AsymmetricEncrypt. |
Plaintext | String | Yes | SGVsbG8gd29ybGQ= | The plaintext that you want to encrypt. The plaintext must be Base64-encoded. |
KeyId | String | Yes | key-hzz630494463ejqjx**** | The ID, alias, or Alibaba Cloud Resource Name (ARN) of the key. For more information, see Manage a key alias. Note When you access a key within another Alibaba Cloud account, you must enter the ARN of the key. The ARN of the key is in the |
KeyVersionId | String | Yes | 2ab1a983-7072-4bbc-a582-584b5bd8**** | The version ID of the key. The ID must be globally unique. Note You can call the ListKeyVersions operation to query the versions of a key. KeyVersionId specifies the version ID of a key. |
Algorithm | String | Yes | RSAES_OAEP_SHA_1 | The encryption algorithm. |
DryRun | String | No | false | Specifies whether to perform a dry run. Valid values:
A dry run is used for testing in API calls. You can perform a dry run to check whether you have the permissions to access the resources that you want to manage and whether the request parameters are correctly configured. If you set DryRun to true in the request, KMS always returns an error code that indicates the cause of the error. KMS may return the following error codes:
|
Response parameters
Parameter | Type | Example | Description |
KeyVersionId | String | 2ab1a983-7072-4bbc-a582-584b5bd8**** | The version ID of the key that is used to encrypt the plaintext. |
KeyId | String | key-hzz630494463ejqjx**** | The ID of the key. If KeyId is set to the alias or ARN of the key, the ID of the key is returned. |
CiphertextBlob | String | BQKP+1zK6+ZEMxTP5qaVzcsgXtWplYBKm0NXdSnB5FzliFxE1bSiu4dnEIlca2JpeH7yz1/S6fed630H+hIH6DoM25fTLNcKj+mFB0Xnh9m2+HN59Mn4qyTfcUeadnfCXSWcGBouhXFwcdd2rJ3n337bzTf4jm659gZu3L0i6PLuxM9p7mqdwO0cKJPfGVfhnfMz+f4alMg79WB/NNyE2lyX7/qxvV49ObNrrJbKSFiz8Djocaf0IESNLMbfYI5bXjWkJlX92DQbKhibtQW8ZOJ//ZC6t0AWcUoKL6QDm/dg5koQalcleRinpB+QadFm894sLbVZ9+N4GVsv1Wbjwg== | The Base64-encoded ciphertext that was generated after encryption. |
RequestId | String | 475f1620-b9d3-4d35-b5c6-3fbdd941423d | The request ID. |
Examples
Sample requests
http(s)://[Endpoint]/?Action=AsymmetricEncrypt
&Plaintext=SGVsbG8gd29ybGQ=
&KeyId=key-hzz630494463ejqjx****
&KeyVersionId=2ab1a983-7072-4bbc-a582-584b5bd8****
&Algorithm=RSAES_OAEP_SHA_1
&DryRun=false
&<Common request parameters>Sample success responses
XML format
HTTP/1.1 200 OK
Content-Type:application/xml
<AsymmetricEncryptResponse>
<KeyVersionId>2ab1a983-7072-4bbc-a582-584b5bd8****</KeyVersionId>
<KeyId>key-hzz630494463ejqjx****</KeyId>
<CiphertextBlob>BQKP+1zK6+ZEMxTP5qaVzcsgXtWplYBKm0NXdSnB5FzliFxE1bSiu4dnEIlca2JpeH7yz1/S6fed630H+hIH6DoM25fTLNcKj+mFB0Xnh9m2+HN59Mn4qyTfcUeadnfCXSWcGBouhXFwcdd2rJ3n337bzTf4jm659gZu3L0i6PLuxM9p7mqdwO0cKJPfGVfhnfMz+f4alMg79WB/NNyE2lyX7/qxvV49ObNrrJbKSFiz8Djocaf0IESNLMbfYI5bXjWkJlX92DQbKhibtQW8ZOJ//ZC6t0AWcUoKL6QDm/dg5koQalcleRinpB+QadFm894sLbVZ9+N4GVsv1Wbjwg==</CiphertextBlob>
<RequestId>475f1620-b9d3-4d35-b5c6-3fbdd941423d</RequestId>
</AsymmetricEncryptResponse>JSON format
HTTP/1.1 200 OK
Content-Type:application/json
{
"KeyVersionId" : "2ab1a983-7072-4bbc-a582-584b5bd8****",
"KeyId" : "key-hzz630494463ejqjx****",
"CiphertextBlob" : "BQKP+1zK6+ZEMxTP5qaVzcsgXtWplYBKm0NXdSnB5FzliFxE1bSiu4dnEIlca2JpeH7yz1/S6fed630H+hIH6DoM25fTLNcKj+mFB0Xnh9m2+HN59Mn4qyTfcUeadnfCXSWcGBouhXFwcdd2rJ3n337bzTf4jm659gZu3L0i6PLuxM9p7mqdwO0cKJPfGVfhnfMz+f4alMg79WB/NNyE2lyX7/qxvV49ObNrrJbKSFiz8Djocaf0IESNLMbfYI5bXjWkJlX92DQbKhibtQW8ZOJ//ZC6t0AWcUoKL6QDm/dg5koQalcleRinpB+QadFm894sLbVZ9+N4GVsv1Wbjwg==",
"RequestId" : "475f1620-b9d3-4d35-b5c6-3fbdd941423d"
}Error codes
HttpCode | Error code | Error message | Description |
400 | Rejected.UnsupportedOperation | Unsupported operation. | The operation is not supported. |
404 | Forbidden.AliasNotFound | The specified Alias is not found. | The specified alias is not found. |
404 | Forbidden.KeyNotFound | The specified Key is not found. | The specified key does not exist. |
For a list of error codes, see Service error codes.