git.distorted.org.uk Git - u/mdw/catacomb/blob - key/passphrase.h

   1 /* -*-c-*-
   2  *
   3  * Reading passphrases
   4  *
   5  * (c) 1999 Straylight/Edgeware
   6  */
   7
   8 /*----- Licensing notice --------------------------------------------------*
   9  *
  10  * This file is part of Catacomb.
  11  *
  12  * Catacomb is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU Library General Public License as
  14  * published by the Free Software Foundation; either version 2 of the
  15  * License, or (at your option) any later version.
  16  *
  17  * Catacomb is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU Library General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU Library General Public
  23  * License along with Catacomb; if not, write to the Free
  24  * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
  25  * MA 02111-1307, USA.
  26  */
  27
  28 #ifndef CATACOMB_PASSPHRASE_H
  29 #define CATACOMB_PASSPHRASE_H
  30
  31 #ifdef __cplusplus
  32   extern "C" {
  33 #endif
  34
  35 /*----- Header files ------------------------------------------------------*/
  36
  37 #include <stddef.h>
  38
  39 /*----- Data structures ---------------------------------------------------*/
  40
  41 /* --- Passphrase modes --- *
  42  *
  43  * @PMODE_VERIFY@ requests that the passphrase be repeated to make sure it's
  44  * right.
  45  */
  46
  47 enum {
  48   PMODE_READ,
  49   PMODE_VERIFY
  50 };
  51
  52 /*----- Functions provided ------------------------------------------------*/
  53
  54 /* --- @passphrase_connect@ ---
  55  *
  56  * Arguments:   @const char *sock@ = socket name to connect to, or null for
  57  *                      default
  58  *
  59  * Returns:     Zero if OK, nonzero if it failed
  60  *
  61  * Use:         Attempts to connect to the passphrase pixie.
  62  */
  63
  64 extern int passphrase_connect(const char */*sock*/);
  65
  66 /* --- @passphrase_read@ --- *
  67  *
  68  * Arguments:   @const char *tag@ = pointer to passphrase tag string
  69  *              @unsigned mode@ = reading mode
  70  *              @char *buf@ = pointer to destination buffer
  71  *              @size_t sz@ = size of destination buffer
  72  *
  73  * Returns:     Zero if successful, nonzero on failure.
  74  *
  75  * Use:         Reads a passphrase from the user, using some system-specific
  76  *              secure mechanism.  The mechanism may keep a cache of
  77  *              passphrases, so the user may not necessarily be prompted.
  78  */
  79
  80 extern int passphrase_read(const char */*tag*/, unsigned /*mode*/,
  81                            char */*buf*/, size_t /*sz*/);
  82
  83 /* --- @passphrase_cancel@ --- *
  84  *
  85  * Arguments:   @const char *tag@ = pointer to passphrase tag string
  86  *
  87  * Returns:     ---
  88  *
  89  * Use:         Attempts to make the passphrase cache forget about a
  90  *              particular passphrase.  This may be useful if the passphrase
  91  *              turns out to be wrong, or if the user is attempting to change
  92  *              the passphrase.
  93  */
  94
  95 extern void passphrase_cancel(const char */*tag*/);
  96
  97 /*----- That's all, folks -------------------------------------------------*/
  98
  99 #ifdef __cplusplus
 100   }
 101 #endif
 102
 103 #endif