ReEncryptDatav2
ReEncryptDatav2.go
This example reencrypts some text using an AWS Key Management Service (AWS KMS) customer master key (CMK).
go run ReEncryptDatav2.go -k KeyID -d DATA
- KeyID is the ID of the AWS KMS key to use for reencrypting the data.
- DATA is the data to reencrypt, as a string.
The unit test accepts similar values in config.json.
Source code
// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
// SPDX - License - Identifier: Apache - 2.0
package main
import (
"context"
"flag"
"fmt"
"github.com/aws/aws-sdk-go-v2/config"
"github.com/aws/aws-sdk-go-v2/service/kms"
)
// KMSReEncryptAPI defines the interface for the ReEncrypt function.
// We use this interface to test the function using a mocked service.
type KMSReEncryptAPI interface {
ReEncrypt(ctx context.Context,
params *kms.ReEncryptInput,
optFns ...func(*kms.Options)) (*kms.ReEncryptOutput, error)
}
// ReEncryptText reencrypts some text using a new AWS Key Management Service (AWS KMS) customer master key (CMK).
// Inputs:
// c is the context of the method call, which includes the AWS Region.
// api is the interface that defines the method call.
// input defines the input arguments to the service call.
// Output:
// If success, a ReEncryptOutput object containing the result of the service call and nil.
// Otherwise, nil and an error from the call to ReEncrypt.
func ReEncryptText(c context.Context, api KMSReEncryptAPI, input *kms.ReEncryptInput) (*kms.ReEncryptOutput, error) {
return api.ReEncrypt(c, input)
}
func main() {
keyID := flag.String("k", "", "The ID of a KMS key")
data := flag.String("d", "", "The data to reencrypt, as a string")
flag.Parse()
if *keyID == "" || *data == "" {
fmt.Println("You must supply the ID of a KMS key and data")
fmt.Println("-k KEY-ID -d DATA")
return
}
cfg, err := config.LoadDefaultConfig(context.TODO())
if err != nil {
panic("configuration error, " + err.Error())
}
client := kms.NewFromConfig(cfg)
blob := []byte(*data)
input := &kms.ReEncryptInput{
CiphertextBlob: blob,
DestinationKeyId: keyID,
}
result, err := ReEncryptText(context.TODO(), client, input)
if err != nil {
fmt.Println("Got error reencrypting data:")
fmt.Println(err)
return
}
fmt.Println("Blob (base-64 byte array):")
fmt.Println(result.CiphertextBlob)
}
See the complete example in GitHub.
Last modified January 15, 2021: Code Example Highlighting, Vairous Documentation Fixes (#1045) (495b900)