4d9a26498e
Paste a secret, get a link, send it. The first person to open it and press
Reveal sees the secret; the link dies at that moment. The recipient needs a
browser and nothing else — no account, no client, no installed tooling.
The server cannot read what it stores. AES-256-GCM happens in the browser and
the key lives in the URL fragment, which browsers never transmit, so hushd
holds ciphertext and no key material. That is a property of where the key sits
rather than a promise about our conduct, which is why there is deliberately no
endpoint accepting a plaintext secret and no server-side-encryption fallback:
two guarantees behind one URL would be worse than one honest guarantee.
Three decisions carry the design:
* GET /s/{id} touches NO storage, not even to check existence. Slack, Teams,
WhatsApp, iMessage and Outlook Safe Links all fetch a URL before a human
sees it, so destroying on GET would destroy most secrets in transit and the
recipient's "already used" would be indistinguishable from interception.
Only POST /reveal consumes. Bot user-agent detection is an arms race;
removing the side effect from GET is not. Pinned by
TestGettingTheRevealPageNeverConsumesTheSecret.
* Destruction is one Redis GETDEL, which is atomic. GET-then-DEL has a window
where two simultaneous readers both win, and for a one-time secret that
window is the product. The store contract demands atomicity and the same
concurrency test runs against both implementations.
* Missing, already-revealed, expired and evicted are ONE indistinguishable
410. Separating them would confirm to a prober that a given link was real.
The secret id IS the capability, so secret.ID is a struct whose every
accidental path — %v, %s, String(), slog, json.Marshal — emits a redacted
handle or refuses, and the raw value needs an explicit Value(). The first
version tried to prevent leaks by implementing no String() at all; its own test
caught that Go's fmt prints unexported fields anyway, so forbidding the method
had removed the control rather than the leak.
Operationally: structured JSON on stdout in the fleet's wire format, which
Vector already collects with no annotation; six hush_* metrics on the chassis
registry with no id, IP or path in any label; five alert rules wired into
vmalert. The public Ingress enumerates /, /s/ and /api/ so /metrics, /healthz
and /readyz share the port but are unreachable from the internet — no
basic-auth middleware to maintain and get wrong.
Dependencies are vendored because go-chassis is private: the Woodpecker test
step and the in-cluster Kaniko build both run -mod=vendor with GOPROXY=off and
hold no git credential.
cmd/hush-mcp is a stdio MCP server doing the same client-side crypto locally,
so using hush from an agent preserves the same guarantee as using it from a
browser.
162 lines
5.3 KiB
Go
162 lines
5.3 KiB
Go
package redis
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import (
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"context"
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"errors"
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)
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type GeoCmdable interface {
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GeoAdd(ctx context.Context, key string, geoLocation ...*GeoLocation) *IntCmd
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GeoPos(ctx context.Context, key string, members ...string) *GeoPosCmd
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GeoRadius(ctx context.Context, key string, longitude, latitude float64, query *GeoRadiusQuery) *GeoLocationCmd
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GeoRadiusStore(ctx context.Context, key string, longitude, latitude float64, query *GeoRadiusQuery) *IntCmd
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GeoRadiusByMember(ctx context.Context, key, member string, query *GeoRadiusQuery) *GeoLocationCmd
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GeoRadiusByMemberStore(ctx context.Context, key, member string, query *GeoRadiusQuery) *IntCmd
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GeoSearch(ctx context.Context, key string, q *GeoSearchQuery) *StringSliceCmd
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GeoSearchLocation(ctx context.Context, key string, q *GeoSearchLocationQuery) *GeoSearchLocationCmd
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GeoSearchStore(ctx context.Context, key, store string, q *GeoSearchStoreQuery) *IntCmd
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GeoDist(ctx context.Context, key string, member1, member2, unit string) *FloatCmd
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GeoHash(ctx context.Context, key string, members ...string) *StringSliceCmd
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}
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func (c cmdable) GeoAdd(ctx context.Context, key string, geoLocation ...*GeoLocation) *IntCmd {
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args := make([]interface{}, 2+3*len(geoLocation))
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args[0] = "geoadd"
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args[1] = key
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for i, eachLoc := range geoLocation {
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args[2+3*i] = eachLoc.Longitude
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args[2+3*i+1] = eachLoc.Latitude
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args[2+3*i+2] = eachLoc.Name
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}
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cmd := NewIntCmd(ctx, args...)
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_ = c(ctx, cmd)
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return cmd
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}
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// GeoRadius queries a geospatial index for members within a distance from a coordinate.
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// This is a read-only variant that does not support Store or StoreDist options.
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//
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// Deprecated: Use GeoSearch with BYRADIUS argument instead as of Redis 6.2.0.
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func (c cmdable) GeoRadius(
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ctx context.Context, key string, longitude, latitude float64, query *GeoRadiusQuery,
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) *GeoLocationCmd {
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cmd := NewGeoLocationCmd(ctx, query, "georadius_ro", key, longitude, latitude)
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if query.Store != "" || query.StoreDist != "" {
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cmd.SetErr(errors.New("GeoRadius does not support Store or StoreDist"))
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return cmd
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}
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_ = c(ctx, cmd)
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return cmd
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}
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// GeoRadiusStore is a writing GEORADIUS command.
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func (c cmdable) GeoRadiusStore(
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ctx context.Context, key string, longitude, latitude float64, query *GeoRadiusQuery,
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) *IntCmd {
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args := geoLocationArgs(query, "georadius", key, longitude, latitude)
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cmd := NewIntCmd(ctx, args...)
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if query.Store == "" && query.StoreDist == "" {
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cmd.SetErr(errors.New("GeoRadiusStore requires Store or StoreDist"))
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return cmd
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}
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_ = c(ctx, cmd)
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return cmd
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}
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// GeoRadiusByMember queries a geospatial index for members within a distance from a member.
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// This is a read-only variant that does not support Store or StoreDist options.
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//
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// Deprecated: Use GeoSearch with BYRADIUS and FROMMEMBER arguments instead as of Redis 6.2.0.
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func (c cmdable) GeoRadiusByMember(
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ctx context.Context, key, member string, query *GeoRadiusQuery,
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) *GeoLocationCmd {
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cmd := NewGeoLocationCmd(ctx, query, "georadiusbymember_ro", key, member)
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if query.Store != "" || query.StoreDist != "" {
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cmd.SetErr(errors.New("GeoRadiusByMember does not support Store or StoreDist"))
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return cmd
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}
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_ = c(ctx, cmd)
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return cmd
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}
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// GeoRadiusByMemberStore is a writing GEORADIUSBYMEMBER command.
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func (c cmdable) GeoRadiusByMemberStore(
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ctx context.Context, key, member string, query *GeoRadiusQuery,
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) *IntCmd {
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args := geoLocationArgs(query, "georadiusbymember", key, member)
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cmd := NewIntCmd(ctx, args...)
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if query.Store == "" && query.StoreDist == "" {
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cmd.SetErr(errors.New("GeoRadiusByMemberStore requires Store or StoreDist"))
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return cmd
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}
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_ = c(ctx, cmd)
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return cmd
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}
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func (c cmdable) GeoSearch(ctx context.Context, key string, q *GeoSearchQuery) *StringSliceCmd {
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args := make([]interface{}, 0, 13)
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args = append(args, "geosearch", key)
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args = geoSearchArgs(q, args)
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cmd := NewStringSliceCmd(ctx, args...)
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_ = c(ctx, cmd)
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return cmd
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}
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func (c cmdable) GeoSearchLocation(
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ctx context.Context, key string, q *GeoSearchLocationQuery,
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) *GeoSearchLocationCmd {
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args := make([]interface{}, 0, 16)
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args = append(args, "geosearch", key)
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args = geoSearchLocationArgs(q, args)
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cmd := NewGeoSearchLocationCmd(ctx, q, args...)
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_ = c(ctx, cmd)
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return cmd
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}
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func (c cmdable) GeoSearchStore(ctx context.Context, key, store string, q *GeoSearchStoreQuery) *IntCmd {
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args := make([]interface{}, 0, 15)
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args = append(args, "geosearchstore", store, key)
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args = geoSearchArgs(&q.GeoSearchQuery, args)
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if q.StoreDist {
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args = append(args, "storedist")
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}
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cmd := NewIntCmd(ctx, args...)
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_ = c(ctx, cmd)
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return cmd
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}
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func (c cmdable) GeoDist(
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ctx context.Context, key string, member1, member2, unit string,
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) *FloatCmd {
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if unit == "" {
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unit = "km"
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}
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cmd := NewFloatCmd(ctx, "geodist", key, member1, member2, unit)
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_ = c(ctx, cmd)
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return cmd
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}
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func (c cmdable) GeoHash(ctx context.Context, key string, members ...string) *StringSliceCmd {
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args := make([]interface{}, 2+len(members))
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args[0] = "geohash"
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args[1] = key
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for i, member := range members {
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args[2+i] = member
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}
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cmd := NewStringSliceCmd(ctx, args...)
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_ = c(ctx, cmd)
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return cmd
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}
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func (c cmdable) GeoPos(ctx context.Context, key string, members ...string) *GeoPosCmd {
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args := make([]interface{}, 2+len(members))
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args[0] = "geopos"
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args[1] = key
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for i, member := range members {
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args[2+i] = member
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}
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cmd := NewGeoPosCmd(ctx, args...)
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_ = c(ctx, cmd)
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return cmd
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}
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