可能没有文件 IO 的 AWS 凭证

Question

I have an application that runs inside a framework. The framework does not permit FILE IO and throws all kinds of security exceptions killing my application.

I can pass the accessKeyId and secretAccessKey via system properties and they are passed correctly.

The problem I have is that no matter what I do the default in the AWS SDK always tries to get the credentials via File IO first (looking for its ~/.aws/credentials) and thus kills everything.

Is there anyway to inhibit that file attempt? Or another way to do this?

I am using aws java SDK2. Weirdly SDK1 seems to work OK but but is too big as it can no be broken into modules like SDK2 can be.

        private SqsClient initialiseClient() {
        System.out.println(System.getProperty("aws.accessKeyId")); // this works
        System.out.println(System.getProperty("aws.secretAccessKey"));  // this works

        return SqsClient.builder()
                .credentialsProvider(SystemPropertyCredentialsProvider.create())
                .region(Region.EU_WEST_1)
                .build());
        }

Stack Trace:

    Exception in thread "Thread-28" java.security.AccessControlException: access denied ("java.io.FilePermission" "C:\Users\username\.aws\credentials" "read")
    at java.security.AccessControlContext.checkPermission(AccessControlContext.java:472)
    at java.security.AccessController.checkPermission(AccessController.java:884)
    at java.lang.SecurityManager.checkPermission(SecurityManager.java:549)
    at java.lang.SecurityManager.checkRead(SecurityManager.java:888)
    at sun.nio.fs.WindowsPath.checkRead(WindowsPath.java:792)
    at sun.nio.fs.WindowsFileAttributeViews$Basic.readAttributes(WindowsFileAttributeViews.java:49)
    at sun.nio.fs.WindowsFileAttributeViews$Basic.readAttributes(WindowsFileAttributeViews.java:38)
    at sun.nio.fs.WindowsFileSystemProvider.readAttributes(WindowsFileSystemProvider.java:193)
    at java.nio.file.Files.readAttributes(Files.java:1737)
    at java.nio.file.Files.isRegularFile(Files.java:2229)
    at software.amazon.awssdk.profiles.ProfileFileLocation.lambda$resolveIfExists$1(ProfileFileLocation.java:128)
    at java.util.Optional.filter(Optional.java:178)
    at software.amazon.awssdk.profiles.ProfileFileLocation.resolveIfExists(ProfileFileLocation.java:128)
    at software.amazon.awssdk.profiles.ProfileFileLocation.credentialsFileLocation(ProfileFileLocation.java:78)
    at software.amazon.awssdk.profiles.ProfileFile.addCredentialsFile(ProfileFile.java:138)
    at software.amazon.awssdk.utils.builder.SdkBuilder.applyMutation(SdkBuilder.java:61)
    at software.amazon.awssdk.profiles.ProfileFile.defaultProfileFile(ProfileFile.java:90)
    at software.amazon.awssdk.core.client.builder.SdkDefaultClientBuilder.mergeGlobalDefaults(SdkDefaultClientBuilder.java:196)
    at software.amazon.awssdk.core.client.builder.SdkDefaultClientBuilder.syncClientConfiguration(SdkDefaultClientBuilder.java:149)
    at software.amazon.awssdk.services.sqs.DefaultSqsClientBuilder.buildClient(DefaultSqsClientBuilder.java:27)
    at software.amazon.awssdk.services.sqs.DefaultSqsClientBuilder.buildClient(DefaultSqsClientBuilder.java:22)
    at software.amazon.awssdk.core.client.builder.SdkDefaultClientBuilder.build(SdkDefaultClientBuilder.java:124)
    at net.something.fdDataExchange.messageHandlers.QMessageHandlerV2.lambda$initialiseClient$0(QMessageHandlerV2.java:66)
    at java.security.AccessController.doPrivileged(Native Method)
    at net.something.fdDataExchange.messageHandlers.QMessageHandlerV2.initialiseClient(QMessageHandlerV2.java:63)
    at net.something.fdDataExchange.messageHandlers.QMessageHandlerV2.connect(QMessageHandlerV2.java:52)
    at net.something.fdDataExchange.messageHandlers.QMessageHandlerV2.<init>(QMessageHandlerV2.java:47)
    at net.something.fdDataExchange.MessageHandler.receiveDirectMsg(MessageHandler.java:28)
    at net.something.fdDataExchange.commandProcessors.QCommandProcessor.run(QCommandProcessor.java:19)
    at java.lang.Thread.run(Thread.java:748)

Answer 1

You can try to implement a custom provider instead of using the system credential provider. Here is a small example to connect to S3 but it holds for any service for AWS. And here is the link for your reference: https://docs.aws.amazon.com/sdk-for-java/v1/developer-guide/credentials.html

BasicAWSCredentials awsCreds = new BasicAWSCredentials("access_key_id", "secret_key_id");
AmazonS3 s3Client = AmazonS3ClientBuilder.standard()
                        .withCredentials(new AWSStaticCredentialsProvider(awsCreds))
                        .build();

For SDK2 maybe this should work:

To explicitly supply credentials to an AWS client

Instantiate a class that provides the AwsCredentials interface, such as AwsSessionCredentials. Supply it with the AWS access key and secret key to use for the connection.

Create an StaticCredentialsProvider with the AwsCredentials object.

Configure the client builder with the StaticCredentialsProvider and build the client.

The following example creates a new service client that uses credentials that you supplied:

AwsSessionCredentials awsCreds = AwsSessionCredentials.create(
    "your_access_key_id_here",
    "your_secret_key_id_here",
    "your_session_token_here");

S3Client s32 = S3Client.builder()
                       .credentialsProvider(StaticCredentialsProvider.create(awsCreds))
                       .build();

Source: https://docs.aws.amazon.com/sdk-for-java/v2/developer-guide/credentials.html

Hope it helps!