适用于 Java 的 Azure sdk 如何设置用户委派 key 和共享身份验证签名 SAS

Question

以下代码在最后一行抛出异常:

            // Create a BlobServiceClient object which will be used to create a container client
            System.out.println(String.format("Connection String %s", connectStr));
            blobServiceClient = new BlobServiceClientBuilder().connectionString(connectStr).buildClient();

            // Get a user delegation key for the Blob service that's valid for seven days.
            // You can use the key to generate any number of shared access signatures over the lifetime of the key.
            keyStart = OffsetDateTime.now();
            keyExpiry = OffsetDateTime.now().plusHours(7);
 error ->   userDelegationKey = blobServiceClient.getUserDelegationKey(keyStart, keyExpiry);

异常: </Message><AuthenticationErrorDetail>Only authentication scheme Bearer is supported</AuthenticationErrorDetail></Error>"

Caused by: com.azure.storage.blob.models.BlobStorageException: Status code 403, "<?xml version="1.0" encoding="utf-8"?><Error><Code>AuthenticationFailed</Code><Message>Server failed to authenticate the request. Make sure the value of Authorization header is formed correctly including the signature. RequestId:d375b3bf-b01e-0044-1191-9c75a8000000

我尝试改编 .NET Java 教程，但到目前为止还没有运气。

这个错误似乎与 REST API 调用有关，有什么想法吗？

Answer 1

因此，经过多次尝试，使用存储帐户的连接字符串来使用用户委派 key 不起作用。我必须注册一个应用程序并添加新的应用程序环境变量。最后，在 IAM 仪表板中检查正确的权限。

就我而言，我使用 Azure 和 Spring，

1. 仅添加了以下依赖项:

        <dependency>
            <groupId>com.azure</groupId>
            <artifactId>azure-storage-blob</artifactId>
            <version>12.8.0</version>
        </dependency>
        <dependency>
            <groupId>com.azure</groupId>
            <artifactId>azure-identity</artifactId>
            <version>1.1.2</version>
        </dependency>

在 Azure 上创建/注册应用

使用证书和 secret 创建应用的客户端 secret 。

将应用程序-客户端 ID、租户 ID 和客户端 key 存储在环境变量中即在 Macos 上:

export AZURE_CLIENT_ID="xxxxxxx"
launchctl setenv AZURE_CLIENT_ID $AZURE_CLIENT_ID

export AZURE_TENANT_ID="xxxxxxx"
launchctl setenv AZURE_TENANT_ID $AZURE_TENANT_ID 

export AZURE_CLIENT_SECRET="xxxxxxx"
launchctl setenv AZURE_CLIENT_SECRET $AZURE_CLIENT_SECRET

将Storage Blob Data Contributor的正确角色分配添加到存储帐户的用户和应用。 see this

现在可以使用以下代码生成用户委托(delegate) key 和示例容器 SAS:

String endpoint = String.format(Locale.ROOT, "https://%s.blob.core.windows.net", "accountName");

// Create a BlobServiceClient object which will be used to create a container client
blobServiceClient = new BlobServiceClientBuilder().endpoint(endpoint)
        .credential(new DefaultAzureCredentialBuilder().build()).buildClient();

// Get a user delegation key for the Blob service that's valid for seven days.
// You can use the key to generate any number of shared access signatures over the lifetime of the key.
keyStart = OffsetDateTime.now();
keyExpiry = OffsetDateTime.now().plusDays(7);
userDelegationKey = blobServiceClient.getUserDelegationKey(keyStart, keyExpiry);

BlobContainerSasPermission blobContainerSas = new BlobContainerSasPermission();
blobContainerSas.setReadPermission(true);
BlobServiceSasSignatureValues blobServiceSasSignatureValues = new BlobServiceSasSignatureValues(keyExpiry,
        blobContainerSas);
BlobContainerClient blobContainerClient = blobServiceClient.getBlobContainerClient("containerName");
if (!blobContainerClient.exists())
    blobContainerClient.create();

String sas = blobContainerClient
        .generateUserDelegationSas(blobServiceSasSignatureValues, userDelegationKey);

希望这对其他人有帮助!