66 lines
1.6 KiB
Zig
66 lines
1.6 KiB
Zig
//! PQxdh handshake implementation
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//!
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//! Implements X25519Kyber768 hybrid key exchange for post-quantum security.
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const std = @import("std");
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const Session = @import("session.zig").Session;
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const SessionConfig = @import("config.zig").SessionConfig;
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/// Handshake state machine
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pub const Handshake = struct {
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/// Initiate handshake as client
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pub fn initiate(
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peer_did: []const u8,
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config: SessionConfig,
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ctx: anytype,
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) !Session {
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// TODO: Implement PQxdh initiation
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_ = peer_did;
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_ = config;
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_ = ctx;
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var session = Session.new(peer_did, config);
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session.state = .handshake_initiated;
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return session;
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}
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/// Resume existing session
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pub fn resume(
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peer_did: []const u8,
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stored: StoredSession,
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ctx: anytype,
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) !Session {
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// TODO: Implement fast resumption
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_ = peer_did;
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_ = stored;
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_ = ctx;
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return Session.new(peer_did, .{});
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}
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/// Respond to handshake as server
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pub fn respond(
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request: HandshakeRequest,
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config: SessionConfig,
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ctx: anytype,
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) !Session {
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// TODO: Implement PQxdh response
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_ = request;
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_ = config;
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_ = ctx;
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return Session.new("", config);
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}
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};
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/// Incoming handshake request
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pub const HandshakeRequest = struct {
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peer_did: []const u8,
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ephemeral_pubkey: []const u8,
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prekey_id: u64,
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signature: [64]u8,
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};
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/// Stored session for resumption
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const StoredSession = @import("session.zig").StoredSession;
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