/
get_key.go
56 lines (50 loc) · 1.69 KB
/
get_key.go
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// Copyright 2019 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License 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 kms
// [START kms_get_asymmetric_public]
import (
"context"
"crypto/x509"
"encoding/pem"
"fmt"
cloudkms "cloud.google.com/go/kms/apiv1"
kmspb "google.golang.org/genproto/googleapis/cloud/kms/v1"
)
// getAsymmetricPublicKey retrieves the public key from a saved asymmetric key pair on KMS.
func getAsymmetricPublicKey(name string) (interface{}, error) {
// name: "projects/PROJECT_ID/locations/global/keyRings/RING_ID/cryptoKeys/KEY_ID/cryptoKeyVersions/1"
ctx := context.Background()
client, err := cloudkms.NewKeyManagementClient(ctx)
if err != nil {
return nil, fmt.Errorf("cloudkms.NewKeyManagementClient: %v", err)
}
// Build the request.
req := &kmspb.GetPublicKeyRequest{
Name: name,
}
// Call the API.
response, err := client.GetPublicKey(ctx, req)
if err != nil {
return nil, fmt.Errorf("GetPublicKey: %v", err)
}
// Parse the key.
keyBytes := []byte(response.Pem)
block, _ := pem.Decode(keyBytes)
publicKey, err := x509.ParsePKIXPublicKey(block.Bytes)
if err != nil {
return nil, fmt.Errorf("x509.ParsePKIXPublicKey: %v", err)
}
return publicKey, nil
}
// [END kms_get_asymmetric_public]