* Allow passing AssociatedData factories in keysutil
This allows the high-level, algorithm-agnostic Encrypt/Decrypt with
Factory to pass in AssociatedData, and potentially take multiple
factories (to allow KMS keys to work). On AEAD ciphers with a relevant
factory, an AssociatedData factory will be used to populate the
AdditionalData field of the SymmetricOpts struct, using it in the AEAD
Seal process.
Signed-off-by: Alexander Scheel <alex.scheel@hashicorp.com>
* Add associated_data to Transit Encrypt/Decrypt API
This allows passing the associated_data (the last AD in AEAD) to
Transit's encrypt/decrypt when using an AEAD cipher (currently
aes128-gcm96, aes256-gcm96, and chacha20-poly1305). We err if this
parameter is passed on non-AEAD ciphers presently.
This associated data can be safely transited in plaintext, without risk
of modifications. In the event of tampering with either the ciphertext
or the associated data, decryption will fail.
Signed-off-by: Alexander Scheel <alex.scheel@hashicorp.com>
* Add changelog
Signed-off-by: Alexander Scheel <alex.scheel@hashicorp.com>
* Add to documentation
Signed-off-by: Alexander Scheel <alex.scheel@hashicorp.com>
Signed-off-by: Alexander Scheel <alex.scheel@hashicorp.com>
