src/mx/privacy.c

   1 /*@ S-nail - a mail user agent derived from Berkeley Mail.
   2  *@ Implementation of privacy.h.
   3  *
   4  * Copyright (c) 2015 - 2020 Steffen (Daode) Nurpmeso <steffen@sdaoden.eu>.
   5  * SPDX-License-Identifier: ISC
   6  *
   7  * Permission to use, copy, modify, and/or distribute this software for any
   8  * purpose with or without fee is hereby granted, provided that the above
   9  * copyright notice and this permission notice appear in all copies.
  10  *
  11  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  12  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  13  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  14  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  15  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  16  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  17  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  18  */
  19 #undef su_FILE
  20 #define su_FILE privacy
  21 #define mx_SOURCE
  22 #define mx_SOURCE_PRIVACY
  23
  24 #ifndef mx_HAVE_AMALGAMATION
  25 # include "mx/nail.h"
  26 #endif
  27
  28 su_EMPTY_FILE()
  29 #if defined mx_HAVE_XTLS
  30 #include <su/cs.h>
  31 #include <su/mem.h>
  32
  33 #include "mx/privacy.h"
  34 #include "su/code-in.h"
  35
  36 boole
  37 mx_privacy_sign_is_desired(void){
  38    boole rv;
  39    NYD_IN;
  40
  41    rv = ok_blook(smime_sign); /* TODO USER@HOST <-> *from* +++!!! */
  42 #ifndef mx_HAVE_TLS
  43    if(rv){
  44       n_err(_("No TLS support compiled in\n"));
  45       rv = FAL0;
  46    }
  47 #endif
  48
  49    NYD_OU;
  50    return rv;
  51 }
  52
  53 FILE *
  54 mx_privacy_sign(FILE *ip, char const *addr){
  55    FILE *rv;
  56    NYD_IN;
  57    UNUSED(ip);
  58
  59    if(addr == NIL){
  60       n_err(_("No *from* address for signing specified\n"));
  61       rv = NIL;
  62       goto jleave;
  63    }
  64
  65 #ifdef mx_HAVE_TLS
  66    rv = smime_sign(ip, addr);
  67 #else
  68    n_err(_("No TLS support compiled in\n"));
  69    rv = NIL;
  70 #endif
  71
  72 jleave:
  73    NYD_OU;
  74    return rv;
  75 }
  76
  77 boole
  78 mx_privacy_verify(struct message *mp, int nr){
  79    NYD_IN;
  80
  81    UNUSED(mp);
  82    UNUSED(nr);
  83
  84    NYD_OU;
  85    return FAL0;
  86 }
  87
  88 FILE *
  89 mx_privacy_encrypt_try(FILE *ip, char const *to){
  90    char const k[] = "smime-encrypt-";
  91    uz nl;
  92    char const *cp;
  93    char *vs;
  94    FILE *rv;
  95    NYD_IN;
  96
  97    nl = su_cs_len(to);
  98    vs = n_lofi_alloc(sizeof(k)-1 + nl +1);
  99    su_mem_copy(vs, k, sizeof(k) -1);
 100    su_mem_copy(&vs[sizeof(k) -1], to, nl +1);
 101
 102    if((cp = n_var_vlook(vs, FAL0)) != NIL){
 103 #ifdef mx_HAVE_TLS
 104       rv = smime_encrypt(ip, cp, to);
 105       goto jleave;
 106 #else
 107       n_err(_("No TLS support compiled in\n"));
 108 #endif
 109    }
 110
 111    rv = R(FILE*,-1);
 112 jleave:
 113    n_lofi_free(vs);
 114    NYD_OU;
 115    return rv;
 116 }
 117
 118 boole
 119 mx_privacy_encrypt_is_forced(void){
 120    boole rv;
 121    NYD_IN;
 122
 123    rv = ok_blook(smime_force_encryption);
 124    NYD_OU;
 125    return rv;
 126 }
 127
 128 struct message *
 129 mx_privacy_decrypt(struct message *mp, char const *to, char const *cc,
 130       boole is_a_verify_call){
 131    NYD_IN;
 132
 133    UNUSED(mp);
 134    UNUSED(to);
 135    UNUSED(cc);
 136    UNUSED(is_a_verify_call);
 137
 138    NYD_OU;
 139    return NIL;
 140 }
 141
 142 #include "su/code-ou.h"
 143 #endif /* mx_HAVE_XTLS */
 144 /* s-it-mode */