crypto/openpgp_symmetric_encryption.h

   1 // Copyright (c) 2011 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 #pragma once
   8
   9 #include <string>
  10
  11 #include "base/string_piece.h"
  12 #include "crypto/crypto_export.h"
  13
  14 namespace crypto {
  15
  16 // OpenPGPSymmetricEncrytion implements enough of RFC 4880 to read and write
  17 // uncompressed, symmetrically encrypted data. You can create ciphertext
  18 // compatable with this code from the command line with:
  19 //    gpg --compress-algo=NONE --cipher-algo=AES -c
  20 //
  21 // Likewise, the output of this can be decrypted on the command line with:
  22 //    gpg < input
  23 class CRYPTO_EXPORT OpenPGPSymmetricEncrytion {
  24  public:
  25   enum Result {
  26     OK,
  27     UNKNOWN_CIPHER,  // you forgot to pass --cipher-algo=AES to gpg
  28     UNKNOWN_HASH,
  29     NOT_SYMMETRICALLY_ENCRYPTED,  // it's OpenPGP data, but not correct form
  30     COMPRESSED,  // you forgot to pass --compress-algo=NONE
  31     PARSE_ERROR,  // it's not OpenPGP data.
  32     INTERNAL_ERROR,
  33   };
  34
  35   static Result Decrypt(base::StringPiece encrypted,
  36                         base::StringPiece passphrase,
  37                         std::string *out);
  38
  39   static std::string Encrypt(base::StringPiece plaintext,
  40                              base::StringPiece passphrase);
  41 };
  42
  43 }  // namespace crypto
  44
  45 #endif  // CRYPTO_OPENPGP_SYMMETRIC_ENCRYPTION_H_
  46