xah30
c95e1a482c
Both server and client deterministically rotate the on-wire obfuscation mask (SNI, HTTP Host/User-Agent/Server headers, UDP padding profile) at 05:00 Moscow time (02:00 UTC) every day, derived from the CA fingerprint + UTC date — no network coordination needed. - aura-crypto::masks: MaskSet + 4 palettes (16 SNI, 10 UA, 5 Server, 4 padding profiles); derive_mask_for_msk_date via HKDF-SHA256(salt="aura-mask-v1-salt", ikm=ca_fp||"YYYY-MM-DD", info="aura-mask-v1"); ca_fingerprint with built-in base64 PEM decode (no new deps). - aura-cli::masks: MaskRotator (Arc<RwLock<MaskSet>>) + Hinnant's civil_from_days for manual UTC date math; scheduler picks next 02:00 UTC strictly (avoids busy-loop at boundary); spawned at startup in server::run/client::run. - aura-transport: PADDING_PROFILES + next_bucket_for_profile (profile 0 byte-for- byte equals legacy pad_to_https_size); TcpOpts gains user_agent/server_header; UdpOpts gains padding_profile; MultiServer holds Arc<UdpServer>/Arc<TcpServer> with set_udp_opts/set_tcp_opts so rotation propagates without restart. - Backward-compatible: defaults preserve previous behavior; existing 97 tests unchanged. 17 new tests (derive determinism + date variation, civil-from-days known points incl. 1970-01-01/2000-02-29/2024->2025, next-rotation boundary, msk_today offset, profile equivalence, base64 round-trip, full mask-driven UDP loopback). Total: 114 passed, clippy/fmt clean. No new workspace deps. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
57 lines
2.5 KiB
TOML
57 lines
2.5 KiB
TOML
# Aura VPN server configuration (project §9).
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# Copy to server.toml and adjust. Paths may begin with `~` (expands to your home directory).
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[server]
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# Human-readable name (also the server's inner-handshake identity).
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name = "aura-edge-1"
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# UDP socket to listen on. ":443" mimics HTTPS; binding it needs privileges.
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listen = "0.0.0.0:443"
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# Accept workers (advisory in v1).
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workers = 4
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[pki]
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# Trust anchor (the Aura CA) and this server's leaf cert/key, all PEM.
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# Generate with: aura pki init --ca-name "Aura CA" --out ~/.aura
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# aura pki issue-server --domain vpn.example.com --out ~/.aura --ca ~/.aura
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ca_cert = "~/.aura/ca.crt"
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cert = "~/.aura/server.crt"
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key = "~/.aura/server.key"
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[tunnel]
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# Address pool for clients; v1 uses a single shared server-side TUN on this network.
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pool_cidr = "10.7.0.0/24"
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# TUN MTU (leave headroom under the path MTU for QUIC + Aura framing).
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mtu = 1420
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# DNS server advertised to clients (informational in v1).
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dns = "10.7.0.1"
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[mimicry]
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# Outer-TLS camouflage hostname the server presents/expects.
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sni = "cdn.example.com"
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# Enable traffic padding to blend packet sizes into HTTPS buckets.
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padding = true
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[transport]
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# Aura's own post-quantum transport runs over plain UDP (primary), with TCP/443 and QUIC (HTTP/3
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# mimicry) as fallbacks. On the server, `order` selects exactly which transports are bound and
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# accepted simultaneously. Omitting this whole section enables udp/tcp/quic on 443/443/444.
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order = ["udp", "tcp", "quic"]
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# The UDP transport and QUIC both ride UDP, so udp_port and quic_port MUST differ. TCP may reuse the
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# UDP port number (different protocol). Ports bind on the IP from [server] listen above.
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udp_port = 443
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tcp_port = 443
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quic_port = 444
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# UDP: pad datagrams up to HTTPS size buckets to blur the on-wire size distribution.
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obfuscate = true
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# TCP: prepend a minimal HTTP/1.1 preamble (Host = [mimicry] sni) so the open resembles plain HTTP.
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masquerade = true
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[transport.masks]
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# Daily protocol-mask rotation. When `true`, every day at 05:00 MSK (= 02:00 UTC) the server
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# derives a new (SNI, User-Agent, Server-header, padding-profile) tuple from
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# HKDF-SHA256(CA-fingerprint, MSK-date) and applies it to new connections — the client derives the
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# same tuple independently from the CA fingerprint it already trusts, so no wire coordination is
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# needed. Existing connections keep the mask they accepted with. Default: true.
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# When `false`, the static values above ([mimicry] sni, [transport] obfuscate, ...) are used as-is.
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enabled = true
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