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https://issues.apache.org/jira/browse/CAY-2109?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Nikita Timofeev updated CAY-2109:
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Fix Version/s: 4.0.M6
> cayenne-crypto: add value authentication (HMAC)
> -----------------------------------------------
>
> Key: CAY-2109
> URL: https://issues.apache.org/jira/browse/CAY-2109
> Project: Cayenne
> Issue Type: Bug
> Reporter: Andrus Adamchik
> Assignee: Andrus Adamchik
> Fix For: 4.0.M6
>
>
> A previously ignored concern with using cayenne-crypto is data integrity.
> Corrupt messages will happily decrypt to garbage. Valid messages will happily
> decrypt with a corrupt key, also to garbage. So to make the system more
> robust, we'll be adding an optional message authentication code (MAC). I am
> using "Cryptography Engineering" book [1] as a reference on the best MAC
> practices. Implementation parameters:
> * HMAC [2]
> * SHA-256
> * authenticate-then-encrypt
> * Authenticated message will be made of the following fields:
> protocol_version || flags || secret_key || message
> (or should we just do header || secret_key || message?)
> [1] https://www.schneier.com/books/cryptography_engineering/
> [2] https://en.wikipedia.org/wiki/Hash-based_message_authentication_code
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