fix: issue when a DynamoDB Set attribute is marked as SIGN_ONLY in th… #560
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…e AWS Database Encryption SDK (DB-ESDK) for DynamoDB.
DB-ESDK for DynamoDB supports SIGN_ONLY and ENCRYPT_AND_SIGN attribute actions. In version 3.1.0 and below, when a Set type is assigned a SIGN_ONLY attribute action, there is a chance that signature validation of the record containing a Set will fail on read, even if the Set attributes contain the same values. The probability of a failure depends on the order of the elements in the Set combined with how DynamoDB returns this data, which is undefined.
This update addresses the issue by ensuring that any Set values are canonicalized in the same order while written to DynamoDB as when read back from DynamoDB.
See: https://github.com/aws/aws-database-encryption-sdk-dynamodb-java/DecryptWithPermute/README.md for additional details
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