This patch provides routines that can be shared between https://pagure.io/dogtagpki/issue/2605 CMC feature: id-cmc-identityProofV2 per rfc5272 and https://pagure.io/dogtagpki/issue/2604 RFE: shared secret storage and retrieval mechanism Note: symkey algorithm remains at DES3 until cmc feature materializes. thanks, Christina