1// Copyright (c) 2012 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef CRYPTO_OPENPGP_SYMMETRIC_ENCRYPTION_H_
6#define CRYPTO_OPENPGP_SYMMETRIC_ENCRYPTION_H_
7
8#include <string>
9
10#include "base/strings/string_piece.h"
11#include "crypto/crypto_export.h"
12
13namespace crypto {
14
15// OpenPGPSymmetricEncrytion implements enough of RFC 4880 to read and write
16// uncompressed, symmetrically encrypted data. You can create ciphertext
17// compatable with this code from the command line with:
18//    gpg --compress-algo=NONE --cipher-algo=AES -c
19//
20// Likewise, the output of this can be decrypted on the command line with:
21//    gpg < input
22class CRYPTO_EXPORT OpenPGPSymmetricEncrytion {
23 public:
24  enum Result {
25    OK,
26    UNKNOWN_CIPHER,  // you forgot to pass --cipher-algo=AES to gpg
27    UNKNOWN_HASH,
28    NOT_SYMMETRICALLY_ENCRYPTED,  // it's OpenPGP data, but not correct form
29    COMPRESSED,  // you forgot to pass --compress-algo=NONE
30    PARSE_ERROR,  // it's not OpenPGP data.
31    INTERNAL_ERROR,
32  };
33
34  static Result Decrypt(base::StringPiece encrypted,
35                        base::StringPiece passphrase,
36                        std::string *out);
37
38  static std::string Encrypt(base::StringPiece plaintext,
39                             base::StringPiece passphrase);
40};
41
42}  // namespace crypto
43
44#endif  // CRYPTO_OPENPGP_SYMMETRIC_ENCRYPTION_H_
45
46