Uses asymmetric keys to sign signatures.

This operation is only supported for asymmetric keys with Usage set to SIGN/VERIFY. The following table lists the supported signature algorithms.






RSASSA-PSS using SHA-256 and MGF1 with SHA-256



RSASSA-PKCS1-v1_5 using SHA-256



ECDSA on the P-256 Curve(secp256r1) with a SHA-256 digest



ECDSA on the P-256K Curve(secp256k1) with a SHA-256 digest



SM2 Elliptic Curve Digital Signature Algorithm

Note According to the national standard GBT32918, when calculating SM2 signature value, Digest the parameter is not directly used to calculate the SM3 digest, but for the Z(A) the digest computed based on the mosaic values of and M, where M is the original message to be signed and Z(A) is A hash value for user A as defined in gbt32918.


OpenAPI Explorer automatically calculates the signature value. For your convenience, we recommend that you call this operation in OpenAPI Explorer. OpenAPI Explorer dynamically generates the sample code of the operation for different SDKs.

Request parameters

Parameter Type Required Example Description
Action String Yes AsymmetricSign

The operation that you want to perform. Set the value to AsymmetricSign.

Algorithm String Yes RSA_PSS_SHA_256

The signature algorithm to use.

Digest String Yes ZOyIygCyaOW6GjVnihtTFtIS9PNmskdyMlNKiuyjfzw=

Use Algorithm, which is the digest generated for the original message.

Note Use Base64 encoding.
KeyId String Yes 5c438b18-05be-40ad-b6c2-3be6752c****

The globally unique ID of the CMK.

Note This parameter can also be specified as an alias bound to the master key. For more information, see use aliases.
KeyVersionId String Yes 2ab1a983-7072-4bbc-a582-584b5bd8****

The globally unique ID of the CMK version.

Response parameters

Parameter Type Example Description
KeyId String 5c438b18-05be-40ad-b6c2-3be6752c****

The globally unique ID of the CMK.

Note If you set the KeyId parameter to the alias of a CMK, the ID of the CMK created by the alias is returned.
KeyVersionId String 2ab1a983-7072-4bbc-a582-584b5bd8****

The globally unique ID of the CMK version.

Value String M2CceNZH00ZgL9ED/ZHFp21YRAvYeZHknJUc207OCZ0N9wNn9As4z2bON3FF3je+1Nu+2+/8Zj50HpMTpzYpMp2R93cYmACCmhaYoKydxylbyGzJR8y9likZRCrkD38lRoS40aBBvv/6iRKzQuo9EGYVcel36cMNg00VmYNBy3pa1rwg3gA4l3cy6kjayZja1WGPkVhrVKsrJMdbpl0ApLjXKuD8rw1n1XLCwCUEL5eLPljTZaAveqdOFQOiZnZEGI27qIiZe7I1fN8tcz6anS/gTM7xRKE++5egEvRWlTQQTJeApnPSiUPA+8ZykNdelQsOQh5SrGoyI4A5pq3a/w==

The calculated signature.

Note Use Base64 encoding.
RequestId String 475f1620-b9d3-4d35-b5c6-3fbdd941423d

The ID of the request.


Sample requests

&<Common request parameters>

Sample success responses

XML format


JSON format

  "KeyId": "5c438b18-05be-40ad-b6c2-3be6752c****",
  "KeyVersionId": "2ab1a983-7072-4bbc-a582-584b5bd8****",
  "Value": "M2CceNZH00ZgL9ED/ZHFp21YRAvYeZHknJUc207OCZ0N9wNn9As4z2bON3FF3je+1Nu+2+/8Zj50HpMTpzYpMp2R93cYmACCmhaYoKydxylbyGzJR8y9likZRCrkD38lRoS40aBBvv/6iRKzQuo9EGYVcel36cMNg00VmYNBy3pa1rwg3gA4l3cy6kjayZja1WGPkVhrVKsrJMdbpl0ApLjXKuD8rw1n1XLCwCUEL5eLPljTZaAveqdOFQOiZnZEGI27qIiZe7I1fN8tcz6anS/gTM7xRKE++5egEvRWlTQQTJeApnPSiUPA+8ZykNdelQsOQh5SrGoyI4A5pq3a/w==",
  "RequestId": "475f1620-b9d3-4d35-b5c6-3fbdd941423d"

Error codes

For a list of error codes, visit the API Error Center.