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random.go
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random.go
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// Kodex (Community Edition - CE) - Privacy & Security Engineering Platform
// Copyright (C) 2019-2024 KIProtect GmbH (HRB 208395B) - Germany
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
package kodex
import (
"crypto/rand"
"crypto/sha256"
"golang.org/x/crypto/pbkdf2"
)
const RANDOM_ID_LENGTH = 16
func RandomID() []byte {
bytes, err := RandomBytes(RANDOM_ID_LENGTH)
if err != nil {
panic(err)
}
return bytes
}
func RandomBytes(n int) ([]byte, error) {
b := make([]byte, n)
_, err := rand.Read(b)
// Note that err == nil only if we read len(b) bytes.
if err != nil {
return nil, err
}
return b, nil
}
func DeriveKey(key, salt []byte, length int) []byte {
return pbkdf2.Key(key, salt, 4096, length, sha256.New)
}