80 lines
2.2 KiB
Go
80 lines
2.2 KiB
Go
// Copyright (c) 2026 Probo Inc <hello@getprobo.com>.
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice appear in all copies.
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//
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
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// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
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// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
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// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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// PERFORMANCE OF THIS SOFTWARE.
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package deviceagent
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import (
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"errors"
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"fmt"
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"os"
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"path/filepath"
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"strings"
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)
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// KeyFileName stores the device API key on disk.
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const KeyFileName = "agent.key"
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// ErrKeyNotFound is returned when no key file exists.
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var ErrKeyNotFound = errors.New("agent key not found")
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// KeyPath returns the absolute path of the device API key file.
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func KeyPath(dir string) string {
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if dir == "" {
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dir = DefaultConfigDir()
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}
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return filepath.Join(dir, KeyFileName)
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}
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// SaveAPIKey writes the API key to disk with mode 0600.
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func SaveAPIKey(dir, key string) error {
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if dir == "" {
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dir = DefaultConfigDir()
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}
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if err := os.MkdirAll(dir, 0o700); err != nil {
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return fmt.Errorf("cannot create keystore dir: %w", err)
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}
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path := KeyPath(dir)
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if err := replaceRegularFile(path, []byte(strings.TrimSpace(key)+"\n"), 0o600); err != nil {
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return fmt.Errorf("cannot replace key: %w", err)
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}
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return nil
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}
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// LoadAPIKey reads the API key from disk.
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func LoadAPIKey(dir string) (string, error) {
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data, err := os.ReadFile(KeyPath(dir))
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if err != nil {
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if errors.Is(err, os.ErrNotExist) {
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return "", ErrKeyNotFound
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}
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return "", fmt.Errorf("cannot read agent key: %w", err)
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}
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return strings.TrimSpace(string(data)), nil
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}
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// DeleteAPIKey removes the API key file.
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func DeleteAPIKey(dir string) error {
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if err := os.Remove(KeyPath(dir)); err != nil && !errors.Is(err, os.ErrNotExist) {
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return fmt.Errorf("cannot delete agent key: %w", err)
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}
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return nil
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}
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