github.com/hugh712/snapd@v0.0.0-20200910133618-1a99902bd583/asserts/memkeypairmgr.go (about)

     1  // -*- Mode: Go; indent-tabs-mode: t -*-
     2  
     3  /*
     4   * Copyright (C) 2015-2016 Canonical Ltd
     5   *
     6   * This program is free software: you can redistribute it and/or modify
     7   * it under the terms of the GNU General Public License version 3 as
     8   * published by the Free Software Foundation.
     9   *
    10   * This program is distributed in the hope that it will be useful,
    11   * but WITHOUT ANY WARRANTY; without even the implied warranty of
    12   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    13   * GNU General Public License for more details.
    14   *
    15   * You should have received a copy of the GNU General Public License
    16   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
    17   *
    18   */
    19  
    20  package asserts
    21  
    22  import (
    23  	"sync"
    24  )
    25  
    26  type memoryKeypairManager struct {
    27  	pairs map[string]PrivateKey
    28  	mu    sync.RWMutex
    29  }
    30  
    31  // NewMemoryKeypairManager creates a new key pair manager with a memory backstore.
    32  func NewMemoryKeypairManager() KeypairManager {
    33  	return &memoryKeypairManager{
    34  		pairs: make(map[string]PrivateKey),
    35  	}
    36  }
    37  
    38  func (mkm *memoryKeypairManager) Put(privKey PrivateKey) error {
    39  	mkm.mu.Lock()
    40  	defer mkm.mu.Unlock()
    41  
    42  	keyID := privKey.PublicKey().ID()
    43  	if mkm.pairs[keyID] != nil {
    44  		return errKeypairAlreadyExists
    45  	}
    46  	mkm.pairs[keyID] = privKey
    47  	return nil
    48  }
    49  
    50  func (mkm *memoryKeypairManager) Get(keyID string) (PrivateKey, error) {
    51  	mkm.mu.RLock()
    52  	defer mkm.mu.RUnlock()
    53  
    54  	privKey := mkm.pairs[keyID]
    55  	if privKey == nil {
    56  		return nil, errKeypairNotFound
    57  	}
    58  	return privKey, nil
    59  }