kms_re_encrypt_data.go

// snippet-comment:[These are tags for the AWS doc team's sample catalog. Do not remove.]
// snippet-sourceauthor:[Doug-AWS]
// snippet-sourcedescription:[Decrypts encrypted data and then immediately re-encrypts data under a new AWS KSM key (KMS key).]
// snippet-keyword:[AWS Key Management Service]
// snippet-keyword:[ReEncrypt function]
// snippet-keyword:[Go]
// snippet-sourcesyntax:[go]
// snippet-service:[kms]
// snippet-keyword:[Code Sample]
// snippet-sourcetype:[full-example]
// snippet-sourcedate:[2018-03-14]
/*
   Copyright 2010-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.

   This file is licensed under the Apache License, Version 2.0 (the "License").
   You may not use this file except in compliance with the License. A copy of
   the License is located at

    http://aws.amazon.com/apache2.0/

   This file is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
   CONDITIONS OF ANY KIND, either express or implied. See the License for the
   specific language governing permissions and limitations under the License.
*/

package main

import (
    "github.com/aws/aws-sdk-go/aws/session"
    "github.com/aws/aws-sdk-go/service/kms"

    "fmt"
    "os"
)

func main() {
    // Initialize a session that the SDK uses to load
    // credentials from the shared credentials file ~/.aws/credentials
    // and configuration from the shared configuration file ~/.aws/config.
    sess := session.Must(session.NewSessionWithOptions(session.Options{
        SharedConfigState: session.SharedConfigEnable,
    }))

    // Create KMS service client
    svc := kms.New(sess)

    // Encrypt data key
    //
    // Replace the fictitious key ARN with a valid key ID

    keyId := "arn:aws:kms:us-west-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab"

    // Encrypted data
    blob := []byte("1234567890")

    // Re-encrypt the data key
    result, err := svc.ReEncrypt(&kms.ReEncryptInput{CiphertextBlob: blob, DestinationKeyId: &keyId})

    if err != nil {
        fmt.Println("Got error re-encrypting data: ", err)
        os.Exit(1)
    }

    fmt.Println("Blob (base-64 byte array):")
    fmt.Println(result.CiphertextBlob)
}