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.
111 lines
7.0 KiB
Go
111 lines
7.0 KiB
Go
// Copyright 2019 The Go Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package filedesc
|
|
|
|
import (
|
|
"google.golang.org/protobuf/internal/descopts"
|
|
"google.golang.org/protobuf/internal/pragma"
|
|
"google.golang.org/protobuf/reflect/protoreflect"
|
|
)
|
|
|
|
var (
|
|
emptyNames = new(Names)
|
|
emptyEnumRanges = new(EnumRanges)
|
|
emptyFieldRanges = new(FieldRanges)
|
|
emptyFieldNumbers = new(FieldNumbers)
|
|
emptySourceLocations = new(SourceLocations)
|
|
|
|
emptyFiles = new(FileImports)
|
|
emptyMessages = new(Messages)
|
|
emptyFields = new(Fields)
|
|
emptyOneofs = new(Oneofs)
|
|
emptyEnums = new(Enums)
|
|
emptyEnumValues = new(EnumValues)
|
|
emptyExtensions = new(Extensions)
|
|
emptyServices = new(Services)
|
|
)
|
|
|
|
// PlaceholderFile is a placeholder, representing only the file path.
|
|
type PlaceholderFile string
|
|
|
|
func (f PlaceholderFile) ParentFile() protoreflect.FileDescriptor { return f }
|
|
func (f PlaceholderFile) Parent() protoreflect.Descriptor { return nil }
|
|
func (f PlaceholderFile) Index() int { return 0 }
|
|
func (f PlaceholderFile) Syntax() protoreflect.Syntax { return 0 }
|
|
func (f PlaceholderFile) Name() protoreflect.Name { return "" }
|
|
func (f PlaceholderFile) FullName() protoreflect.FullName { return "" }
|
|
func (f PlaceholderFile) IsPlaceholder() bool { return true }
|
|
func (f PlaceholderFile) Options() protoreflect.ProtoMessage { return descopts.File }
|
|
func (f PlaceholderFile) Path() string { return string(f) }
|
|
func (f PlaceholderFile) Package() protoreflect.FullName { return "" }
|
|
func (f PlaceholderFile) Imports() protoreflect.FileImports { return emptyFiles }
|
|
func (f PlaceholderFile) Messages() protoreflect.MessageDescriptors { return emptyMessages }
|
|
func (f PlaceholderFile) Enums() protoreflect.EnumDescriptors { return emptyEnums }
|
|
func (f PlaceholderFile) Extensions() protoreflect.ExtensionDescriptors { return emptyExtensions }
|
|
func (f PlaceholderFile) Services() protoreflect.ServiceDescriptors { return emptyServices }
|
|
func (f PlaceholderFile) SourceLocations() protoreflect.SourceLocations { return emptySourceLocations }
|
|
func (f PlaceholderFile) ProtoType(protoreflect.FileDescriptor) { return }
|
|
func (f PlaceholderFile) ProtoInternal(pragma.DoNotImplement) { return }
|
|
|
|
// PlaceholderEnum is a placeholder, representing only the full name.
|
|
type PlaceholderEnum protoreflect.FullName
|
|
|
|
func (e PlaceholderEnum) ParentFile() protoreflect.FileDescriptor { return nil }
|
|
func (e PlaceholderEnum) Parent() protoreflect.Descriptor { return nil }
|
|
func (e PlaceholderEnum) Index() int { return 0 }
|
|
func (e PlaceholderEnum) Syntax() protoreflect.Syntax { return 0 }
|
|
func (e PlaceholderEnum) Name() protoreflect.Name { return protoreflect.FullName(e).Name() }
|
|
func (e PlaceholderEnum) FullName() protoreflect.FullName { return protoreflect.FullName(e) }
|
|
func (e PlaceholderEnum) IsPlaceholder() bool { return true }
|
|
func (e PlaceholderEnum) Options() protoreflect.ProtoMessage { return descopts.Enum }
|
|
func (e PlaceholderEnum) Values() protoreflect.EnumValueDescriptors { return emptyEnumValues }
|
|
func (e PlaceholderEnum) ReservedNames() protoreflect.Names { return emptyNames }
|
|
func (e PlaceholderEnum) ReservedRanges() protoreflect.EnumRanges { return emptyEnumRanges }
|
|
func (e PlaceholderEnum) IsClosed() bool { return false }
|
|
func (e PlaceholderEnum) ProtoType(protoreflect.EnumDescriptor) { return }
|
|
func (e PlaceholderEnum) ProtoInternal(pragma.DoNotImplement) { return }
|
|
|
|
// PlaceholderEnumValue is a placeholder, representing only the full name.
|
|
type PlaceholderEnumValue protoreflect.FullName
|
|
|
|
func (e PlaceholderEnumValue) ParentFile() protoreflect.FileDescriptor { return nil }
|
|
func (e PlaceholderEnumValue) Parent() protoreflect.Descriptor { return nil }
|
|
func (e PlaceholderEnumValue) Index() int { return 0 }
|
|
func (e PlaceholderEnumValue) Syntax() protoreflect.Syntax { return 0 }
|
|
func (e PlaceholderEnumValue) Name() protoreflect.Name { return protoreflect.FullName(e).Name() }
|
|
func (e PlaceholderEnumValue) FullName() protoreflect.FullName { return protoreflect.FullName(e) }
|
|
func (e PlaceholderEnumValue) IsPlaceholder() bool { return true }
|
|
func (e PlaceholderEnumValue) Options() protoreflect.ProtoMessage { return descopts.EnumValue }
|
|
func (e PlaceholderEnumValue) Number() protoreflect.EnumNumber { return 0 }
|
|
func (e PlaceholderEnumValue) ProtoType(protoreflect.EnumValueDescriptor) { return }
|
|
func (e PlaceholderEnumValue) ProtoInternal(pragma.DoNotImplement) { return }
|
|
|
|
// PlaceholderMessage is a placeholder, representing only the full name.
|
|
type PlaceholderMessage protoreflect.FullName
|
|
|
|
func (m PlaceholderMessage) ParentFile() protoreflect.FileDescriptor { return nil }
|
|
func (m PlaceholderMessage) Parent() protoreflect.Descriptor { return nil }
|
|
func (m PlaceholderMessage) Index() int { return 0 }
|
|
func (m PlaceholderMessage) Syntax() protoreflect.Syntax { return 0 }
|
|
func (m PlaceholderMessage) Name() protoreflect.Name { return protoreflect.FullName(m).Name() }
|
|
func (m PlaceholderMessage) FullName() protoreflect.FullName { return protoreflect.FullName(m) }
|
|
func (m PlaceholderMessage) IsPlaceholder() bool { return true }
|
|
func (m PlaceholderMessage) Options() protoreflect.ProtoMessage { return descopts.Message }
|
|
func (m PlaceholderMessage) IsMapEntry() bool { return false }
|
|
func (m PlaceholderMessage) Fields() protoreflect.FieldDescriptors { return emptyFields }
|
|
func (m PlaceholderMessage) Oneofs() protoreflect.OneofDescriptors { return emptyOneofs }
|
|
func (m PlaceholderMessage) ReservedNames() protoreflect.Names { return emptyNames }
|
|
func (m PlaceholderMessage) ReservedRanges() protoreflect.FieldRanges { return emptyFieldRanges }
|
|
func (m PlaceholderMessage) RequiredNumbers() protoreflect.FieldNumbers { return emptyFieldNumbers }
|
|
func (m PlaceholderMessage) ExtensionRanges() protoreflect.FieldRanges { return emptyFieldRanges }
|
|
func (m PlaceholderMessage) ExtensionRangeOptions(int) protoreflect.ProtoMessage {
|
|
panic("index out of range")
|
|
}
|
|
func (m PlaceholderMessage) Messages() protoreflect.MessageDescriptors { return emptyMessages }
|
|
func (m PlaceholderMessage) Enums() protoreflect.EnumDescriptors { return emptyEnums }
|
|
func (m PlaceholderMessage) Extensions() protoreflect.ExtensionDescriptors { return emptyExtensions }
|
|
func (m PlaceholderMessage) ProtoType(protoreflect.MessageDescriptor) { return }
|
|
func (m PlaceholderMessage) ProtoInternal(pragma.DoNotImplement) { return }
|