74 lines
2.5 KiB
Go
74 lines
2.5 KiB
Go
// Copyright 2017-2021 DERO Project. All rights reserved.
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// Use of this source code in any form is governed by RESEARCH license.
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// license can be found in the LICENSE file.
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// GPG: 0F39 E425 8C65 3947 702A 8234 08B2 0360 A03A 9DE8
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//
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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package walletapi
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import "fmt"
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import "crypto/rand"
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import "golang.org/x/crypto/chacha20poly1305"
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// all data in encrypted within the storage using this, PERIOD
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// all data has a new nonce, appended to the the data , last 12 bytes
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func EncryptWithKey(Key []byte, Data []byte) (result []byte, err error) {
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nonce := make([]byte, chacha20poly1305.NonceSize, chacha20poly1305.NonceSize)
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cipher, err := chacha20poly1305.New(Key)
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if err != nil {
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return
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}
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_, err = rand.Read(nonce)
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if err != nil {
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return
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}
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Data = cipher.Seal(Data[:0], nonce, Data, nil) // is this okay
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result = append(Data, nonce...) // append nonce
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return
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}
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// extract 12 byte nonce from the data and deseal the data
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func DecryptWithKey(Key []byte, Data []byte) (result []byte, err error) {
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// make sure data is atleast 28 byte, 16 bytes of AEAD cipher and 12 bytes of nonce
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if len(Data) < 28 {
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err = fmt.Errorf("Invalid data")
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return
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}
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data_without_nonce := Data[0 : len(Data)-chacha20poly1305.NonceSize]
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nonce := Data[len(Data)-chacha20poly1305.NonceSize:]
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cipher, err := chacha20poly1305.New(Key)
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if err != nil {
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return
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}
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return cipher.Open(result[:0], nonce, data_without_nonce, nil) // result buffer should be different
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}
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// use master keys, everytime required
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func (w *Wallet_Memory) Encrypt(Data []byte) (result []byte, err error) {
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return EncryptWithKey(w.master_password, Data)
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}
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// use master keys, everytime required
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func (w *Wallet_Memory) Decrypt(Data []byte) (result []byte, err error) {
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return DecryptWithKey(w.master_password, Data)
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}
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