crypto/openpgp_symmetric_encryption.h

   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/string_piece.h"
  11 #include "crypto/crypto_export.h"
  12
  13 namespace 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
  22 class 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