src/common.h

   1 /* vim:tw=78:ts=8:sw=4:set ft=c:  */
   2 /*
   3     Copyright (C) 2006-2010 Ben Kibbey <bjk@luxsci.net>
   4
   5     This program is free software; you can redistribute it and/or modify
   6     it under the terms of the GNU General Public License as published by
   7     the Free Software Foundation; either version 2 of the License, or
   8     (at your option) any later version.
   9
  10     This program 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 this program; if not, write to the Free Software
  17     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02110-1301  USA
  18 */
  19 #ifndef COMMON_H
  20 #define COMMON_H
  21
  22 #include <sys/types.h>
  23 #include <sys/stat.h>
  24 #include <pth.h>
  25 #include <gcrypt.h>
  26
  27 #define _ASSUAN_ONLY_GPG_ERRORS 1
  28 #include <assuan.h>
  29
  30 #ifdef ENABLE_NLS
  31 #ifdef HAVE_LOCALE_H
  32 #include <locale.h>
  33 #endif
  34 #endif
  35
  36 #include "gettext.h"
  37 #define N_(msgid)       gettext(msgid)
  38 #include "status.h"
  39
  40 enum {
  41     STATE_CONNECTED,
  42     STATE_OPEN
  43 };
  44
  45 typedef enum {
  46     INQUIRE_INIT,
  47     INQUIRE_BUSY,
  48     INQUIRE_DONE
  49 } inquire_status_t;
  50
  51 typedef enum {
  52     PINENTRY_OPEN,
  53     PINENTRY_SAVE
  54 } pinentry_cmd_t;
  55
  56 #ifdef WITH_PINENTRY
  57 typedef struct {
  58     size_t len;
  59     void *buf;
  60 } membuf_t;
  61
  62 typedef enum {
  63     PINENTRY_NONE,
  64     PINENTRY_INIT,
  65     PINENTRY_PID,
  66     PINENTRY_RUNNING,
  67     PINENTRY_TIMEOUT
  68 } pinentry_status_t;
  69
  70 typedef struct {
  71     gint fd;
  72     gpg_error_t error;
  73     pinentry_status_t status;
  74     union {
  75         gchar key[ASSUAN_LINELENGTH];
  76         pid_t pid;
  77     } what;
  78 } pinentry_key_s;
  79
  80 typedef gpg_error_t (*pinentry_finalize_cb)(assuan_context_t, guchar *, gboolean);
  81
  82 struct pinentry_s {
  83     pth_t tid;
  84     pth_mutex_t status_mutex;
  85     pth_mutex_t cond_mutex;
  86     pth_cond_t cond;
  87     pinentry_cmd_t which;
  88     gchar *filename;
  89     assuan_context_t ctx;
  90     pinentry_finalize_cb cb;
  91     pid_t pid;
  92     pid_t pin_pid;
  93     gint fd;
  94     pinentry_status_t status;
  95     gchar *name;
  96     gchar *title;
  97     gchar *desc;
  98     gchar *prompt;
  99     gchar *ttyname;
 100     gchar *ttytype;
 101     gchar *display;
 102     gchar *path;
 103     gchar *lcctype;
 104     gchar *lcmessages;
 105     gint timeout;
 106     gboolean has_lock;
 107     gint enable;
 108     membuf_t data;
 109     assuan_error_t (*inquire_cb)(void *data, const char *line);
 110     void *inquire_data;
 111 };
 112 #endif
 113
 114 typedef struct {
 115     guint8 magic[5];
 116     guint16 version;
 117     guint64 iter;
 118     guint64 flags;
 119     guint8 iv[16];
 120 } file_header_t;
 121
 122 typedef struct {
 123     gint iter;
 124     guint8 iv[16];
 125 } file_header_v1_t;
 126
 127 typedef struct {
 128     gboolean v1;
 129     gint fd;
 130     struct stat st;
 131     gpointer doc;
 132     goffset len;
 133
 134     union {
 135         file_header_v1_t fh1;
 136         file_header_t fh2;
 137     } ver;
 138 } file_header_internal_t;
 139
 140 struct client_thread_s {
 141     pth_t tid;
 142     pth_msgport_t mp;
 143     pth_t msg_tid;
 144     pth_mutex_t mp_mutex;
 145     gint fd;
 146     struct client_s *cl;
 147 };
 148
 149 struct assuan_cmd_s {
 150     assuan_context_t ctx;
 151     const gchar *line;
 152     gint line_len;
 153     const gchar *line2;
 154 };
 155
 156 /* For use with .flags in the data file header. */
 157 #define PWMD_CIPHER_OFFSET      (1)
 158 #define PWMD_CIPHER(n)          (PWMD_CIPHER_OFFSET << n)
 159 #define PWMD_CIPHER_AES128      PWMD_CIPHER(0)
 160 #define PWMD_CIPHER_AES192      PWMD_CIPHER(1)
 161 #define PWMD_CIPHER_AES256      PWMD_CIPHER(2)
 162 #define PWMD_CIPHER_SERPENT128  PWMD_CIPHER(3)
 163 #define PWMD_CIPHER_SERPENT192  PWMD_CIPHER(4)
 164 #define PWMD_CIPHER_SERPENT256  PWMD_CIPHER(5)
 165 #define PWMD_CIPHER_CAMELLIA128 PWMD_CIPHER(6)
 166 #define PWMD_CIPHER_CAMELLIA192 PWMD_CIPHER(7)
 167 #define PWMD_CIPHER_CAMELLIA256 PWMD_CIPHER(8)
 168 #define PWMD_CIPHER_3DES        PWMD_CIPHER(9)
 169 #define PWMD_CIPHER_CAST5       PWMD_CIPHER(10)
 170 #define PWMD_CIPHER_BLOWFISH    PWMD_CIPHER(11)
 171 #define PWMD_CIPHER_TWOFISH     PWMD_CIPHER(12)
 172 #define PWMD_CIPHER_TWOFISH128  PWMD_CIPHER(13)
 173
 174 #define PWMD_FLAG_OFFSET        (1<<15)
 175 #define PWMD_FLAG(n)            (PWMD_FLAG_OFFSET << n)
 176
 177 struct crypto_s {
 178     gpointer iv;
 179     gpointer key;
 180     gpointer tkey;
 181     size_t tkey_len;
 182     gpointer tkey2;
 183     size_t tkey2_len;
 184     gpointer inbuf;
 185     goffset insize;
 186     gpointer outbuf;
 187     goffset outsize;
 188     file_header_internal_t *fh;
 189     gcry_cipher_hd_t gh;
 190     gsize blocksize;
 191     gsize keysize;
 192 };
 193
 194 /* These are flags that are set by a client option via the SET command. */
 195 #define OPT_ITERATIONS  0x1
 196 #define OPT_PINENTRY    0x2
 197 #define OPT_PINENTRY_TO 0x4
 198 #define OPT_CIPHER      0x8
 199 #define OPT_LOCK        0x10
 200 #define OPT_INQUIRE     0x20
 201 #define OPT_BASE64      0x40
 202
 203 struct client_s {
 204     assuan_context_t ctx;
 205 #ifdef WITH_PINENTRY
 206     struct pinentry_s *pinentry;
 207 #endif
 208     gpointer doc; /* xmlDocPtr */
 209     gpointer xml_error;
 210     gpointer xml;
 211     gint len;
 212     gint state;
 213     gchar *filename;
 214     guchar md5file[16];
 215     gboolean new;
 216     gboolean freed;
 217     time_t mtime;
 218     gboolean has_lock;
 219     gboolean is_lock_cmd;
 220     inquire_status_t inquire_status;
 221     struct client_thread_s *thd;
 222     struct crypto_s *crypto;
 223     guint opts;
 224     gpg_error_t last_rc;
 225     gboolean lock_on_open;
 226     gboolean rc_on_locked;
 227 };
 228
 229 GKeyFile *keyfileh;
 230 gboolean log_syslog;
 231 gint zlib_bufsize;
 232 pth_mutex_t rcfile_mutex;
 233 pth_mutex_t cn_mutex;
 234 GSList *cn_thread_list;
 235
 236 void log_write(const gchar *fmt, ...);
 237 gpg_error_t send_error(assuan_context_t ctx, gpg_error_t pwmd_errno);
 238 gpg_error_t send_syserror(assuan_context_t ctx, int e);
 239 gint open_file(const gchar *filename, struct stat *st);
 240 gpg_error_t do_xml_encrypt(struct client_s *client, struct crypto_s *,
 241         const gchar *filename);
 242 gint get_key_file_integer(const gchar *section, const gchar *what);
 243 gdouble get_key_file_double(const gchar *section, const gchar *what);
 244 gboolean get_key_file_boolean(const gchar *section, const gchar *what);
 245 gchar *get_key_file_string(const gchar *section, const gchar *what);
 246 gchar *expand_homedir(gchar *str);
 247 void free_client(struct client_s *client);
 248 void cleanup_crypto(struct crypto_s **);
 249 struct crypto_s *init_client_crypto();
 250 gpg_error_t init_client_crypto2(const char *filename,
 251         struct crypto_s *crypto);
 252 gpg_error_t do_assuan_command(assuan_context_t ctx,
 253         void *(*cb)(void *data), void *data);
 254 void close_file_header(file_header_internal_t *fh);
 255 void cleanup_ev_cb(void *arg);
 256 void cleanup_mutex_cb(void *arg);
 257 void cleanup_fd_cb(void *arg);
 258 void cleanup_unlink_cb(void *arg);
 259 void cleanup_attr_cb(void *arg);
 260 void cleanup_cancel_cb(void *arg);
 261 guint pwmd_cipher_str_to_cipher(const gchar *str);
 262 const gchar *pwmd_cipher_to_str(guint64 flags);
 263 file_header_internal_t *read_file_header(const gchar *filename, gboolean v1,
 264         gpg_error_t *rc);
 265
 266 #endif