src/src/auths/tls.c

   1 /*************************************************
   2 *     Exim - an Internet mail transport agent    *
   3 *************************************************/
   4
   5 /* Copyright (c) Jeremy Harris 2017 */
   6 /* See the file NOTICE for conditions of use and distribution. */
   7
   8 /* This file provides an Exim authenticator driver for
   9 a server to verify a client SSL certificate
  10 */
  11
  12
  13 #include "../exim.h"
  14 #include "tls.h"
  15
  16 /* Options specific to the tls authentication mechanism. */
  17
  18 optionlist auth_tls_options[] = {
  19   { "server_param",     opt_stringptr,
  20       (void *)(offsetof(auth_tls_options_block, server_param1)) },
  21   { "server_param1",    opt_stringptr,
  22       (void *)(offsetof(auth_tls_options_block, server_param1)) },
  23   { "server_param2",    opt_stringptr,
  24       (void *)(offsetof(auth_tls_options_block, server_param2)) },
  25   { "server_param3",    opt_stringptr,
  26       (void *)(offsetof(auth_tls_options_block, server_param3)) },
  27 };
  28
  29 /* Size of the options list. An extern variable has to be used so that its
  30 address can appear in the tables drtables.c. */
  31
  32 int auth_tls_options_count = nelem(auth_tls_options);
  33
  34 /* Default private options block for the authentication method. */
  35
  36 auth_tls_options_block auth_tls_option_defaults = {
  37     NULL,       /* server_param1 */
  38     NULL,       /* server_param2 */
  39     NULL,       /* server_param3 */
  40 };
  41
  42
  43 #ifdef MACRO_PREDEF
  44
  45 /* Dummy values */
  46 void auth_tls_init(auth_instance *ablock) {}
  47 int auth_tls_server(auth_instance *ablock, uschar *data) {return 0;}
  48 int auth_tls_client(auth_instance *ablock, smtp_inblock *inblock,
  49   smtp_outblock *outblock, int timeout, uschar *buffer, int buffsize) {return 0;}
  50
  51 #else   /*!MACRO_PREDEF*/
  52
  53
  54
  55
  56 /*************************************************
  57 *          Initialization entry point            *
  58 *************************************************/
  59
  60 /* Called for each instance, after its options have been read, to
  61 enable consistency checks to be done, or anything else that needs
  62 to be set up. */
  63
  64 void
  65 auth_tls_init(auth_instance *ablock)
  66 {
  67 ablock->public_name = ablock->name;     /* needed for core code */
  68 }
  69
  70
  71
  72 /*************************************************
  73 *             Server entry point                 *
  74 *************************************************/
  75
  76 /* For interface, see auths/README */
  77
  78 int
  79 auth_tls_server(auth_instance *ablock, uschar *data)
  80 {
  81 auth_tls_options_block * ob = (auth_tls_options_block *)ablock->options_block;
  82
  83 if (ob->server_param1)
  84   auth_vars[expand_nmax++] = expand_string(ob->server_param1);
  85 if (ob->server_param2)
  86   auth_vars[expand_nmax++] = expand_string(ob->server_param2);
  87 if (ob->server_param3)
  88   auth_vars[expand_nmax++] = expand_string(ob->server_param3);
  89 return auth_check_serv_cond(ablock);
  90 }
  91
  92
  93 #endif   /*!MACRO_PREDEF*/
  94 /* End of tls.c */