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tailscale/types/key/key.go

37 lines
1.2 KiB
Go

// Copyright (c) 2020 Tailscale Inc & 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 key defines some types related to curve25519 keys.
package key
import "golang.org/x/crypto/curve25519"
// Private represents a curve25519 private key.
type Private [32]byte
// Private reports whether p is the zero value.
func (p Private) IsZero() bool { return p == Private{} }
// B32 returns k as the *[32]byte type that's used by the
// golang.org/x/crypto packages. This allocates; it might
// not be appropriate for performance-sensitive paths.
func (k Private) B32() *[32]byte { return (*[32]byte)(&k) }
// Public represents a curve25519 public key.
type Public [32]byte
// Public reports whether p is the zero value.
func (p Public) IsZero() bool { return p == Public{} }
// B32 returns k as the *[32]byte type that's used by the
// golang.org/x/crypto packages. This allocates; it might
// not be appropriate for performance-sensitive paths.
func (k Public) B32() *[32]byte { return (*[32]byte)(&k) }
func (k Private) Public() Public {
var pub [32]byte
curve25519.ScalarBaseMult(&pub, (*[32]byte)(&k))
return Public(pub)
}