tdf#105844 offapi,package,sfx2,xmlsecurity: add AEAD w/ AES GCM

... and use it in the new experimental ODF encryption mode.

https://www.w3.org/TR/xmlenc-core1/#sec-AES-GCM

Unfortunately it turned out that NSS PK11_CipherOp() does not work with
CKM_AES_GCM because it is initialized with "context->multi = PR_FALSE"
in sftk_CryptInit(), so the one-step functions PK11_Encrypt() and
PK11_Decrypt() have to be used.

NSS 3.52 also changed a parameter struct definition - see
https://fedoraproject.org/wiki/Changes/NssGCMParams - which is not a
problem for RHEL or SUSE system NSS since those are rebased, but it
is likely a problem for less well maintained Ubuntu LTS, so use
the old struct definition which evidently still works with NSS 3.94.

NSS 3.52 also added a new PK11_AEADOp() API but it looks like this
doesn't support incremental encryption either.

Change-Id: Ibd4a672db74b65b1218926ba35ff8d2f70444c7e
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/160505
Tested-by: Jenkins
Reviewed-by: Michael Stahl <michael.stahl@allotropia.de>

0 files changed, 0 insertions, 0 deletions