mirror of
https://github.com/ergochat/ergo.git
synced 2024-12-30 14:42:50 +01:00
23 lines
715 B
Go
23 lines
715 B
Go
// Copyright (c) 2020 Shivaram Lingamneni <slingamn@cs.stanford.edu>
|
|
// released under the MIT license
|
|
|
|
package utils
|
|
|
|
import (
|
|
"crypto/sha256"
|
|
"encoding/binary"
|
|
"time"
|
|
)
|
|
|
|
// Deterministically generates a confirmation code for some destructive activity;
|
|
// `name` is typically the name of the identity being destroyed (a channel being
|
|
// unregistered, or the server being crashed) and `createdAt` means a different
|
|
// value is required each time.
|
|
func ConfirmationCode(name string, createdAt time.Time) (code string) {
|
|
buf := make([]byte, len(name)+8)
|
|
binary.BigEndian.PutUint64(buf, uint64(createdAt.UnixNano()))
|
|
copy(buf[8:], name[:])
|
|
out := sha256.Sum256(buf)
|
|
return B32Encoder.EncodeToString(out[:3])
|
|
}
|