ee62e2a9d8
* wip * linter fixes * linter fixes * test fixes * linter fixes * fix merge + restructure piecestore packages * review feedback * linter fixes * linter fixes * remove unnecessary aliases to piecestore * more merge fixing
53 lines
1.0 KiB
Go
53 lines
1.0 KiB
Go
// Copyright (C) 2018 Storj Labs, Inc.
|
|
// See LICENSE for copying information.
|
|
|
|
package psclient
|
|
|
|
import (
|
|
"crypto/hmac"
|
|
"crypto/rand"
|
|
"crypto/sha512"
|
|
|
|
"github.com/mr-tron/base58/base58"
|
|
)
|
|
|
|
// PieceID is the unique identifier for pieces
|
|
type PieceID string
|
|
|
|
// NewPieceID creates a PieceID
|
|
func NewPieceID() PieceID {
|
|
b := make([]byte, 32)
|
|
|
|
_, err := rand.Read(b)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
|
|
return PieceID(base58.Encode(b))
|
|
}
|
|
|
|
// String representation of the PieceID
|
|
func (id PieceID) String() string {
|
|
return string(id)
|
|
}
|
|
|
|
// IsValid checks if the current PieceID is valid
|
|
func (id PieceID) IsValid() bool {
|
|
return len(id) >= 20
|
|
}
|
|
|
|
// Derive a new PieceID from the current PieceID and the given secret
|
|
func (id PieceID) Derive(secret []byte) (derived PieceID, err error) {
|
|
mac := hmac.New(sha512.New, secret)
|
|
_, err = mac.Write([]byte(id))
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
h := mac.Sum(nil)
|
|
// Trim the hash if greater than 32 bytes
|
|
if len(h) > 32 {
|
|
h = h[:32]
|
|
}
|
|
return PieceID(base58.Encode(h)), nil
|
|
}
|