src/crypto.h

   1 /*
   2     Copyright (C) 2006-2022 Ben Kibbey <bjk@luxsci.net>
   3
   4     This file is part of pwmd.
   5
   6     Pwmd is free software: you can redistribute it and/or modify
   7     it under the terms of the GNU General Public License version 2 as
   8     published by the Free Software Foundation.
   9
  10     Pwmd is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU General Public License for more details.
  14
  15     You should have received a copy of the GNU General Public License
  16     along with Pwmd.  If not, see <http://www.gnu.org/licenses/>.
  17 */
  18 #ifndef CRYPTO_H
  19 #define CRYPTO_H
  20
  21 #ifdef HAVE_CONFIG_H
  22 #include <config.h>
  23 #endif
  24
  25 #include <assuan.h>
  26 #include <gpg-error.h>
  27 #include <sys/types.h>
  28 #include <sys/stat.h>
  29 #include <gpgme.h>
  30 #include <time.h>
  31
  32 #ifdef HAVE_STDINT_H
  33 #include <stdint.h>
  34 #elif defined (HAVE_INTTYPES_H)
  35 #include <inttypes.h>
  36 #endif
  37
  38 #include "common.h"
  39
  40 #define DEFAULT_EXPIRE          (unsigned long)(60*60*24*365*3) // 3 years
  41
  42 #define CRYPTO_FLAG_NEWFILE     0x0001
  43 #define CRYPTO_FLAG_KEYFILE     0x0002 // --passphrase-file with --import
  44 #define CRYPTO_FLAG_SYMMETRIC   0x0004
  45 #define CRYPTO_FLAG_PASSWD      0x0008
  46 #define CRYPTO_FLAG_PASSWD_NEW  0x0010
  47 #define CRYPTO_FLAG_PASSWD_SIGN 0x0020
  48
  49 struct save_s
  50 {
  51   char **pubkey;                /* SAVE --keyid */
  52   char *sigkey;                 /* SAVE --sign-keyid */
  53   char *userid;                 /* SAVE genkey parameters */
  54   gpgme_key_t *mainkey;         /* GENKEY --subkey-of */
  55   char *algo;
  56   unsigned long expire;
  57   unsigned flags;
  58 };
  59
  60 struct crypto_s
  61 {
  62   assuan_context_t client_ctx;
  63   gpgme_ctx_t ctx;
  64   unsigned char *plaintext;
  65   size_t plaintext_size;
  66   gpgme_data_t cipher;
  67   char **pubkey;
  68   char *sigkey;
  69   char *filename;               /* the currently opened data file */
  70   struct save_s save;
  71   gpg_error_t progress_rc;
  72   time_t status_timeout;
  73   unsigned flags;
  74   char *keyfile;
  75 };
  76
  77 gpgme_error_t crypto_init (struct crypto_s **, void *, const char *, int,
  78                            char *passphrase_file);
  79 gpgme_error_t crypto_init_ctx (struct crypto_s *, int, char *passphrase_file);
  80 gpgme_error_t crypto_genkey (struct client_s *, struct crypto_s *);
  81 gpgme_error_t crypto_encrypt (struct client_s *, struct crypto_s *);
  82 gpgme_error_t crypto_decrypt (struct client_s *, struct crypto_s *);
  83 gpgme_error_t crypto_passwd (struct client_s *, struct crypto_s *);
  84 void crypto_free (struct crypto_s *);
  85 void crypto_free_save (struct save_s *);
  86 void crypto_free_non_keys (struct crypto_s *);
  87 gpgme_error_t crypto_data_to_buf (const gpgme_data_t, unsigned char **,
  88                                   size_t *);
  89 gpg_error_t crypto_write_file (struct crypto_s *, unsigned char **crc,
  90                                size_t *len);
  91 gpgme_error_t crypto_list_keys (struct crypto_s *, char **, int secret,
  92                                 gpgme_key_t **);
  93 char *crypto_key_info (const gpgme_key_t);
  94 void crypto_free_key_list (gpgme_key_t *);
  95 gpg_error_t crypto_try_decrypt (struct client_s *, int);
  96 void crypto_set_keepalive ();
  97 gpg_error_t crypto_is_symmetric (const char *filename);
  98 gpg_error_t crypto_keyid_to_16b (char **keys);
  99 gpg_error_t crypto_keyid_to_16b_once (char *key);
 100 gpg_error_t crypto_delete_key (struct client_s *client, struct crypto_s *,
 101                                const gpgme_key_t, int secret);
 102
 103 #endif