28allday
f69d3464a7
Previously the advertised device name defaulted to the machine hostname. Since the alias is broadcast in plaintext over multicast to the whole subnet every few seconds while the TUI is open, that leaks the hostname to anyone on the network — a privacy problem on a laptop joining untrusted Wi-Fi (the reason LocalSend randomises its aliases). Now first run generates a random "Colour Object" name from public-domain word lists (e.g. "Crimson Quasar"): 56 colours x 44 celestial objects = 2464 combinations. It is generated once and persisted, so a device keeps the same name across restarts. The hostname is still carried in DeviceModel, and the alias remains overridable via --alias or Settings. Word lists are original and use only generic colours and public-domain astronomy terms, so there is no copyright or trademark exposure. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
59 lines
2.5 KiB
Go
59 lines
2.5 KiB
Go
package config
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import (
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"crypto/rand"
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"math/big"
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)
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// Colour + celestial-object name parts, all copyright-safe. Colours are generic
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// English; the objects are public-domain astronomical terms — types of stars
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// and galaxies (Nova, Quasar, Pulsar, Spiral, …). No trademarked or franchise
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// names are used, so a generated alias reads like a celestial body ("Crimson
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// Nova") with no IP exposure.
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//
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// This exists because the alias is broadcast in plaintext over multicast to the
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// whole subnet every few seconds while the TUI is open. On a roaming laptop the
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// machine hostname would leak to strangers on untrusted networks; a randomised
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// alias avoids that, matching LocalSend's behaviour. The hostname is still
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// carried in DeviceModel and any alias is overridable via --alias or Settings.
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var (
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aliasColours = []string{
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"Crimson", "Scarlet", "Azure", "Cobalt", "Emerald", "Amber",
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"Ivory", "Onyx", "Silver", "Graphite", "Burgundy", "Teal",
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"Indigo", "Bronze", "Pearl", "Slate", "Olive", "Maroon",
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"Turquoise", "Gold", "Copper", "Jade", "Ruby", "Sapphire",
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"Midnight", "Sand", "Charcoal", "Cream",
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"Coral", "Violet", "Lavender", "Plum", "Rose", "Salmon",
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"Peach", "Saffron", "Mustard", "Lime", "Mint", "Sage",
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"Forest", "Cyan", "Sky", "Navy", "Steel", "Pewter",
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"Ash", "Ebony", "Obsidian", "Cherry", "Rust", "Sienna",
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"Tan", "Khaki", "Brass", "Platinum",
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}
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aliasObjects = []string{
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"Nova", "Supernova", "Pulsar", "Quasar", "Magnetar", "Nebula",
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"Comet", "Meteor", "Aurora", "Corona", "Eclipse", "Cosmos",
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"Galaxy", "Halo", "Spiral", "Starburst", "Dwarf", "Giant",
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"Supergiant", "Hypergiant", "Cluster", "Drift",
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"Blazar", "Protostar", "Neutron", "Binary", "Cepheid", "Andromeda",
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"Whirlpool", "Pinwheel", "Sombrero", "Triangulum", "Sunflower", "Flare",
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"Plasma", "Photon", "Zenith", "Apogee", "Solstice", "Equinox",
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"Meridian", "Vortex", "Ember", "Beacon",
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}
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)
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// randomAlias returns a colour + celestial-object display name, e.g.
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// "Crimson Nova". It is generated once on first run and persisted by Load, so a
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// device keeps the same name across restarts.
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func randomAlias() string {
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return pick(aliasColours) + " " + pick(aliasObjects)
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}
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// pick chooses a uniformly random element using crypto/rand (no seeding, always
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// unpredictable). It falls back to the first element only if the RNG errors.
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func pick(s []string) string {
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n, err := rand.Int(rand.Reader, big.NewInt(int64(len(s))))
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if err != nil {
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return s[0]
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}
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return s[n.Int64()]
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}
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