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56 lines
1.5 KiB
Go
56 lines
1.5 KiB
Go
// Copyright (c) 2015-2022 MinIO, Inc.
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//
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// This file is part of MinIO Object Storage stack
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package main
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import (
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"encoding/binary"
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"encoding/hex"
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"fmt"
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"hash/crc32"
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"io"
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"github.com/secure-io/sio-go"
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)
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func extractInspectV1(keyHex string, r io.Reader, w io.Writer) error {
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id, err := hex.DecodeString(keyHex[:8])
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if err != nil {
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return err
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}
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key, err := hex.DecodeString(keyHex[8:])
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if err != nil {
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return err
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}
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// Verify that CRC is ok.
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want := binary.LittleEndian.Uint32(id)
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got := crc32.ChecksumIEEE(key)
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if want != got {
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return fmt.Errorf("Invalid key checksum, want %x, got %x", want, got)
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}
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stream, err := sio.AES_256_GCM.Stream(key)
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if err != nil {
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return err
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}
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// Zero nonce, we only use each key once, and 32 bytes is plenty.
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nonce := make([]byte, stream.NonceSize())
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encr := stream.DecryptReader(r, nonce, nil)
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_, err = io.Copy(w, encr)
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return err
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}
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