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keyvault.go
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keyvault.go
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// Copyright © 2018 Banzai Cloud
//
// 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
//
// http://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 azurekv
import (
"context"
"fmt"
"net/http"
"emperror.dev/errors"
"github.com/Azure/azure-sdk-for-go/services/keyvault/2016-10-01/keyvault"
"github.com/Azure/go-autorest/autorest"
"github.com/Azure/go-autorest/autorest/azure"
"github.com/banzaicloud/bank-vaults/pkg/kv"
)
// azureKeyVault is an implementation of the kv.Service interface, that encrypts
// and decrypts and stores data using Azure Key Vault.
type azureKeyVault struct {
client *keyvault.BaseClient
vaultBaseURL string
}
var _ kv.Service = &azureKeyVault{}
// New creates a new kv.Service backed by Azure Key Vault
func New(name string) (kv.Service, error) {
if name == "" {
return nil, errors.Errorf("invalid Key Vault specified: '%s'", name)
}
keyClient := keyvault.New()
keyClient.Authorizer = GetKeyvaultAuthorizer()
return &azureKeyVault{
client: &keyClient,
vaultBaseURL: fmt.Sprintf("https://%s.%s", name, azure.PublicCloud.KeyVaultDNSSuffix),
}, nil
}
func (a *azureKeyVault) Get(key string) ([]byte, error) {
bundle, err := a.client.GetSecret(context.Background(), a.vaultBaseURL, key, "")
if err != nil {
var aerr autorest.DetailedError
if errors.As(err, &aerr) && aerr.StatusCode == http.StatusNotFound {
return nil, kv.NewNotFoundError("error getting secret for key '%s': %s", key, err.Error())
}
return nil, errors.Wrapf(err, "failed to get key: %s", key)
}
return []byte(*bundle.Value), nil
}
func (a *azureKeyVault) Set(key string, val []byte) error {
value := string(val)
parameters := keyvault.SecretSetParameters{
Value: &value,
}
_, err := a.client.SetSecret(context.Background(), a.vaultBaseURL, key, parameters)
return errors.Wrapf(err, "failed to set key: %s", key)
}