src/crypto.h

   1 /*
   2     Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015,
   3     2016, 2017
   4     Ben Kibbey <bjk@luxsci.net>
   5
   6     This file is part of pwmd.
   7
   8     Pwmd is free software: you can redistribute it and/or modify
   9     it under the terms of the GNU General Public License as published by
  10     the Free Software Foundation, either version 2 of the License, or
  11     (at your option) any later version.
  12
  13     Pwmd is distributed in the hope that it will be useful,
  14     but WITHOUT ANY WARRANTY; without even the implied warranty of
  15     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16     GNU General Public License for more details.
  17
  18     You should have received a copy of the GNU General Public License
  19     along with Pwmd.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21 #ifndef CRYPTO_H
  22 #define CRYPTO_H
  23
  24 #include <assuan.h>
  25 #include <gpg-error.h>
  26 #include <sys/types.h>
  27 #include <sys/stat.h>
  28 #include <gpgme.h>
  29 #include <time.h>
  30
  31 #ifdef HAVE_STDINT_H
  32 #include <stdint.h>
  33 #elif defined (HAVE_INTTYPES_H)
  34 #include <inttypes.h>
  35 #endif
  36
  37 #include "common.h"
  38
  39 #define DEFAULT_EXPIRE          (unsigned long)(60*60*24*365*3) // 3 years
  40
  41 #define CRYPTO_FLAG_NEWFILE     0x0001
  42 #define CRYPTO_FLAG_KEYFILE     0x0002 // --passphrase-file with --import
  43 #define CRYPTO_FLAG_SYMMETRIC   0x0004
  44 #define CRYPTO_FLAG_PASSWD      0x0008
  45 #define CRYPTO_FLAG_PASSWD_NEW  0x0010
  46 #define CRYPTO_FLAG_PASSWD_SIGN 0x0020
  47
  48 struct save_s
  49 {
  50   char **pubkey;                /* SAVE --keyid */
  51   char *sigkey;                 /* SAVE --sign-keyid */
  52   char *userid;                 /* SAVE genkey parameters */
  53   gpgme_key_t *mainkey;         /* GENKEY --subkey-of */
  54   char *algo;
  55   unsigned long expire;
  56   unsigned flags;
  57 };
  58
  59 struct crypto_s
  60 {
  61   assuan_context_t client_ctx;
  62   gpgme_ctx_t ctx;
  63   unsigned char *plaintext;
  64   size_t plaintext_size;
  65   gpgme_data_t cipher;
  66   char **pubkey;
  67   char *sigkey;
  68   char *filename;               /* the currently opened data file */
  69   struct save_s save;
  70   gpg_error_t progress_rc;
  71   time_t status_timeout;
  72   unsigned flags;
  73   char *keyfile;
  74 };
  75
  76 gpgme_error_t crypto_init (struct crypto_s **, void *, const char *, int,
  77                            char *passphrase_file);
  78 gpgme_error_t crypto_init_ctx (struct crypto_s *, int, char *passphrase_file);
  79 gpgme_error_t crypto_genkey (struct client_s *, struct crypto_s *);
  80 gpgme_error_t crypto_encrypt (struct client_s *, struct crypto_s *);
  81 gpgme_error_t crypto_decrypt (struct client_s *, struct crypto_s *);
  82 gpgme_error_t crypto_passwd (struct client_s *, struct crypto_s *);
  83 void crypto_free (struct crypto_s *);
  84 void crypto_free_save (struct save_s *);
  85 void crypto_free_non_keys (struct crypto_s *);
  86 gpgme_error_t crypto_data_to_buf (const gpgme_data_t, unsigned char **,
  87                                   size_t *);
  88 gpg_error_t crypto_write_file (struct crypto_s *, unsigned char **crc,
  89                                size_t *len);
  90 gpgme_error_t crypto_list_keys (struct crypto_s *, char **, int secret,
  91                                 gpgme_key_t **);
  92 char *crypto_key_info (const gpgme_key_t);
  93 void crypto_free_key_list (gpgme_key_t *);
  94 gpg_error_t crypto_try_decrypt (struct client_s *, int);
  95 void crypto_set_keepalive ();
  96 gpg_error_t crypto_is_symmetric (const char *filename);
  97 gpg_error_t crypto_keyid_to_16b (char **keys);
  98 gpg_error_t crypto_keyid_to_16b_once (char *key);
  99 gpg_error_t crypto_delete_key (struct client_s *client, struct crypto_s *,
 100                                const gpgme_key_t, int secret);
 101
 102 #endif