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      Re-encrypt
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        Re-encrypt

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        Article summary

        Available in Classic and VPC

        Reencrypt the ciphertext with the most recent version of the specified master key. It can only be requested as an AES256 or RSA2048 key type.

        Request

        This section describes the request format. The method and URI are as follows:

        MethodURI
        POST
        • API Gateway request signature v1: /keys/v1/{keyTag}/re-encrypt
        • API Gateway request signature v2: /keys/v2/{keyTag}/re-encrypt

        Request headers

        For information about the headers common to all Key Management Service APIs, see Key Management Service request headers.

        Request path parameters

        You can use the following path parameters with your request:

        FieldTypeRequiredDescription
        keyTagStringRequiredKey tag
        • Unique identifier for the key derived from the key name
        • Check through Get key list
        • Use to request encryption or decryption with REST APIs
        • Key tags are not treated as confidential information

        Request body

        You can include the following data in the body of your request:

        FieldTypeRequiredDescription
        ciphertextString or Array<String>RequiredString data created by encrypting a plaintext
        contextStringConditionalBase64-encoded string data
        • Required when using keys with convergent encryption
        • Can be up to 50 bytes long
        • Always generate the same ciphertext, even when encrypting the same data multiple times

        Request example

        The request example is as follows:

        • Request API Gateway request signature v1 and ciphertext as String type
        curl --location --request POST 'https://kms.apigw.ntruss.com/keys/v1/a1b2c3d4e5f6g7h8i9j0k1l2m3n4o5p6q7r8s9t0u1v2w3x4y5z6/re-encrypt' \
        --header 'x-ncp-apigw-timestamp: {Timestamp}' \
        --header 'x-ncp-apigw-api-key: {API Gateway API Key}' \
        --header 'x-ncp-iam-access-key: {Sub Account Access Key}' \
        --header 'x-ncp-apigw-signature-v1: {API Gateway Signature}' \
        --data '{
          "ciphertext": "{CIPHERTEXT}",
          "context": "{BASE64_CONTEXT}"
        }'
        Shell
        • Request API Gateway request signature v and ciphertext as Array<String> type
        curl --location --request POST 'https://kms.apigw.ntruss.com/keys/v2/a1b2c3d4e5f6g7h8i9j0k1l2m3n4o5p6q7r8s9t0u1v2w3x4y5z6/re-encrypt' \
        --header 'x-ncp-apigw-timestamp: {Timestamp}' \
        --header 'x-ncp-iam-access-key: {Sub Account Access Key}' \
        --header 'x-ncp-apigw-signature-v2: {API Gateway Signature}' \
        --data '{
          "ciphertext": ["{CIPHERTEXT_1}", "{CIPHERTEXT_2}", "{CIPHERTEXT_3}"],
          "context": "{BASE64_CONTEXT}"
        }'
        Shell

        Response

        This section describes the response format.

        Response body

        The response body includes the following data:

        FieldTypeRequiredDescription
        codeString-Success or Failure
        msgString-Description of the response code (code)
      • Display an empty value ("") on request success (SUCCESS)
      • dataObject-Response result
        data.newCiphertextString or Array<String>-String data that reencrypted the ciphertext (ciphertext) with the most recent version of the specified master key

        Response status codes

        For response status codes common to all Key Management Service APIs, see Key Management Service response status codes.

        Response example

        The response example is as follows:

        • Request ciphertext as String type
        {
            "code": "SUCCESS",
            "msg": "",
            "data": {
                "newCiphertext": "{CIPHERTEXT_NEW}"
            }
        }
        JSON
        • Request ciphertext as Array<String> type
        {
            "code": "SUCCESS",
            "msg": "",
            "data": {
                "newCiphertext": [
                    "{CIPHERTEXT_NEW_1}",
                    "{CIPHERTEXT_NEW_2}",
                    "{CIPHERTEXT_NEW_3}"
                ]
            }
        }
        JSON

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