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A lightweight and read-only implementation of the credstash client. Now you can read your KMS encrypted data directly from DynamoDB into your Scala code.

• Only works with up to version 1.11 of Credstash
• Alternatively, you can take a look at my other library, https://github.com/kdrakon/scala-aws-params-reader

• As credstash utilises 128 bit AES encryption, your Java runtime needs the JCE Unlimited Strength Jurisdiction Policy Files or not be limited by it.
• The necessary configuration needed for credstash (AWS credentials, KMS, a DynamoDB, etc.). See their dependencies listing and setup guide here.

Create a SimpleCredStashClient using AWS' KMS and DynamoDB clients:

 val creds = new DefaultAWSCredentialsProviderChain()
 
 val kmsClient: AWSKMSClient = 
 new AWSKMSClient(creds).withRegion(Region.getRegion(Regions.AP_SOUTHEAST_2))
 val dynamoClient: AmazonDynamoDBClient = 
 new AmazonDynamoDBClient(creds).withRegion(Region.getRegion(Regions.AP_SOUTHEAST_2))
 val credstash = SimpleCredStashClient(kmsClient, dynamoClient)

You can then read a String value or other type using a custom CredStashValueReader:

val password = credstash.get("password")
import io.policarp.scala.credstash.reader.Readers._
val timeout = credstash.as[Int]("timeout")