New protocol - #2
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- introduce new crypto layer - introduce security association (key, context) into peer_info - set up dummy keys until we have key negotiation and derivation You need to install gnutls >2.99 into n2nv2/gnutls, if you don't have it installed on your system.
- introduce symmetric p2p packet encryption and authentication - key are constant zero
Conflicts: n2n_v2/crypto.c n2n_v2/crypto.h n2n_v2/edge.c n2n_v2/n2n.c n2n_v2/n2n.h
- AES256 in GCM mode seems not to be supported by gnutls right now - improved debug output
- fix peer lookup for SA lookup - fix sending non-encrypted packets
traffic encryption seems to provied basic functionality
Conflicts: .gitignore n2n_v2/crypto.c n2n_v2/crypto.h n2n_v2/edge.c n2n_v2/n2n.c n2n_v2/n2n.h
- we use HKDF, a scheme based on HMAC - added some references
- introduce a session key derivation scheme called HKDF, which is designed for derivation of symmetric keys out of DH shared secrets - changed overhead defines to prefix AEAD_
finished outline of packet decoding replaced underscores in packet types with hyphens for consistency
- removed obsolete hanshake syn-ack section - changed 0 denotes handshake to 0 denotes non-payload
- removed duplicate packet code definitions - use acknowledge-flag instead of too many packet types
(there is no large enough common part to justify this type)
- The first parameters to the decode_* functions are now base, idx, rem (so they reassemble the encode_* functions more closely) - encode_supernode_register and decode_supernode_register added
(this is a temporary fix; a proper benchmark needs to be created once the implementation is done)
(these values are encoded and checked automatically in the encode/decode funtions)
and: libgcrypt version check improved, few comments added/changed
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