79 lines
3.0 KiB
Go
79 lines
3.0 KiB
Go
/*
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Copyright 2021 The Dapr Authors
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package azure
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import (
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"fmt"
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"time"
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"github.com/Azure/azure-storage-queue-go/azqueue"
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"github.com/Azure/go-autorest/autorest/azure"
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mdutils "github.com/dapr/components-contrib/metadata"
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"github.com/dapr/kit/logger"
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)
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var (
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StorageAccountNameKeys = []string{"accountName", "storageAccount", "storageAccountName"}
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StorageAccountKeyKeys = []string{"accountKey", "accessKey", "storageAccessKey", "storageAccountKey"}
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StorageContainerNameKeys = []string{"containerName", "container", "storageAccountContainer"}
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StorageQueueNameKeys = []string{"queueName", "queue", "storageAccountQueue"}
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StorageTableNameKeys = []string{"tableName", "table", "storageAccountTable"}
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StorageEndpointKeys = []string{"endpoint", "storageEndpoint", "storageAccountEndpoint", "queueEndpointUrl"}
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)
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// GetAzureStorageQueueCredentials returns a azqueues.Credential object that can be used to authenticate an Azure Queue Storage SDK pipeline ("track 1").
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// First it tries to authenticate using shared key credentials (using an account key) if present. It falls back to attempting to use Azure AD (via a service principal or MSI).
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func GetAzureStorageQueueCredentials(log logger.Logger, accountName string, metadata map[string]string) (azqueue.Credential, *azure.Environment, error) {
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settings, err := NewEnvironmentSettings("storage", metadata)
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if err != nil {
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return nil, nil, err
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}
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// Try using shared key credentials first
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accountKey, ok := mdutils.GetMetadataProperty(metadata, StorageAccountKeyKeys...)
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if ok && accountKey != "" {
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credential, newSharedKeyErr := azqueue.NewSharedKeyCredential(accountName, accountKey)
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if err != nil {
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return nil, nil, fmt.Errorf("invalid credentials with error: %s", newSharedKeyErr.Error())
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}
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return credential, settings.AzureEnvironment, nil
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}
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// Fallback to using Azure AD
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spt, err := settings.GetServicePrincipalToken()
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if err != nil {
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return nil, nil, err
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}
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var tokenRefresher azqueue.TokenRefresher = func(credential azqueue.TokenCredential) time.Duration {
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log.Debug("Refreshing Azure Storage auth token")
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err := spt.Refresh()
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if err != nil {
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panic(err)
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}
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token := spt.Token()
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credential.SetToken(token.AccessToken)
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// Make the token expire 2 minutes earlier to get some extra buffer
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exp := token.Expires().Sub(time.Now().Add(2 * time.Minute))
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log.Debug("Received new token, valid for", exp)
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return exp
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}
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credential := azqueue.NewTokenCredential("", tokenRefresher)
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return credential, settings.AzureEnvironment, nil
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}
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