| File: | examples/server.c |
| Warning: | line 164, column 3 Value stored to 'rc' is never read |
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| 1 | /* server.c --- Sample server with authentication using Shishi. |
| 2 | * Copyright (C) 2003-2022 Simon Josefsson |
| 3 | * |
| 4 | * This file is part of Shishi. |
| 5 | * |
| 6 | * Shishi is free software; you can redistribute it and/or modify it |
| 7 | * under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 3 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * Shishi is distributed in the hope that it will be useful, but |
| 12 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | * General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with Shishi; if not, see http://www.gnu.org/licenses or write |
| 18 | * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth |
| 19 | * Floor, Boston, MA 02110-1301, USA |
| 20 | * |
| 21 | */ |
| 22 | |
| 23 | #ifdef HAVE_CONFIG_H1 |
| 24 | # include <config.h> |
| 25 | #endif |
| 26 | |
| 27 | #include <stdio.h> |
| 28 | #include <stdlib.h> |
| 29 | |
| 30 | #include <shishi.h> |
| 31 | |
| 32 | #define SERVICE"sample" "sample" |
| 33 | |
| 34 | /* XXX remove this */ |
| 35 | const char *program_name = "client"; |
| 36 | |
| 37 | static int |
| 38 | doit (Shishi * h, Shishi_ap * ap, int verbose) |
| 39 | { |
| 40 | Shishi_asn1 asn1safe; |
| 41 | Shishi_safe *safe; |
| 42 | char *userdata; |
| 43 | size_t userdatalen; |
| 44 | int res; |
| 45 | |
| 46 | printf ("Application exchange start. Press ^D to finish.\n"); |
| 47 | |
| 48 | while ((res = shishi_safe_parse (h, stdinstdin, &asn1safe)) == SHISHI_OK) |
| 49 | { |
| 50 | if (res != SHISHI_OK) |
| 51 | { |
| 52 | fprintf (stderrstderr, "Could not read SAFE:\n%s\n%s\n", |
| 53 | shishi_strerror (res), shishi_error (h)); |
| 54 | return 1; |
| 55 | } |
| 56 | |
| 57 | res = shishi_safe (h, &safe); |
| 58 | if (res != SHISHI_OK) |
| 59 | { |
| 60 | fprintf (stderrstderr, "Could not create SAFE:\n%s\n%s\n", |
| 61 | shishi_strerror (res), shishi_error (h)); |
| 62 | return 1; |
| 63 | } |
| 64 | |
| 65 | shishi_safe_safe_set (safe, asn1safe); |
| 66 | |
| 67 | res = shishi_safe_verify (safe, shishi_ap_key (ap)); |
| 68 | if (res != SHISHI_OK) |
| 69 | { |
| 70 | fprintf (stderrstderr, "Could not verify SAFE:\n%s\n%s\n", |
| 71 | shishi_strerror (res), shishi_error (h)); |
| 72 | return 1; |
| 73 | } |
| 74 | |
| 75 | printf ("Verified SAFE successfully...\n"); |
| 76 | |
| 77 | res = shishi_safe_user_data (h, asn1safe, &userdata, &userdatalen); |
| 78 | if (res != SHISHI_OK) |
| 79 | { |
| 80 | fprintf (stderrstderr, "Could not extract user data:\n%s\n%s\n", |
| 81 | shishi_strerror (res), shishi_error (h)); |
| 82 | return 1; |
| 83 | } |
| 84 | userdata[userdatalen] = '\0'; |
| 85 | printf ("user data: `%s'\n", userdata); |
| 86 | |
| 87 | } |
| 88 | |
| 89 | if (ferror (stdinstdin)) |
| 90 | { |
| 91 | printf ("error reading stdin\n"); |
| 92 | return 1; |
| 93 | } |
| 94 | |
| 95 | return 0; |
| 96 | } |
| 97 | |
| 98 | static Shishi_ap * |
| 99 | auth (Shishi * h, int verbose, const char *cname, const char *sname) |
| 100 | { |
| 101 | Shishi_key *key; |
| 102 | Shishi_ap *ap; |
| 103 | Shishi_asn1 apreq; |
| 104 | char *buf; |
| 105 | size_t buflen; |
| 106 | int rc; |
| 107 | |
| 108 | printf ("Client: %s\n", cname); |
| 109 | printf ("Server: %s\n", sname); |
| 110 | |
| 111 | /* Get key for the server. */ |
| 112 | |
| 113 | key = shishi_hostkeys_for_server (h, sname); |
| 114 | if (!key) |
| 115 | { |
| 116 | printf ("could not find key: %s\n", shishi_error (h)); |
| 117 | return NULL((void*)0); |
| 118 | } |
| 119 | |
| 120 | if (verbose) |
| 121 | shishi_key_print (h, stderrstderr, key); |
| 122 | |
| 123 | /* Read Authentication request from client */ |
| 124 | |
| 125 | printf ("Waiting for client to authenticate itself...\n"); |
| 126 | |
| 127 | rc = shishi_apreq_parse (h, stdinstdin, &apreq); |
| 128 | if (rc != SHISHI_OK) |
| 129 | { |
| 130 | printf ("could not read AP-REQ: %s\n", shishi_strerror (rc)); |
| 131 | return NULL((void*)0); |
| 132 | } |
| 133 | |
| 134 | /* Create Authentication context */ |
| 135 | |
| 136 | rc = shishi_ap (h, &ap); |
| 137 | if (rc != SHISHI_OK) |
| 138 | { |
| 139 | printf ("Could not create AP: %s\n", shishi_strerror (rc)); |
| 140 | return NULL((void*)0); |
| 141 | } |
| 142 | |
| 143 | /* Store request in context */ |
| 144 | |
| 145 | shishi_ap_req_set (ap, apreq); |
| 146 | |
| 147 | /* Process authentication request */ |
| 148 | |
| 149 | rc = shishi_ap_req_process (ap, key); |
| 150 | if (rc != SHISHI_OK) |
| 151 | { |
| 152 | printf ("Could not process AP-REQ: %s\n", shishi_strerror (rc)); |
| 153 | return NULL((void*)0); |
| 154 | } |
| 155 | |
| 156 | if (verbose) |
| 157 | shishi_authenticator_print (h, stderrstderr, shishi_ap_authenticator (ap)); |
| 158 | |
| 159 | rc = shishi_authenticator_client (h, shishi_ap_authenticator (ap), |
| 160 | &buf, &buflen); |
| 161 | printf ("Client name (from authenticator): %.*s\n", (int) buflen, buf); |
| 162 | free (buf); |
| 163 | |
| 164 | rc = shishi_encticketpart_clientrealm |
Value stored to 'rc' is never read | |
| 165 | (h, shishi_tkt_encticketpart (shishi_ap_tkt (ap)), &buf, &buflen); |
| 166 | printf ("Client name (from encticketpart): %.*s\n", (int) buflen, buf); |
| 167 | free (buf); |
| 168 | |
| 169 | rc = shishi_ticket_server (h, shishi_tkt_ticket (shishi_ap_tkt (ap)), |
| 170 | &buf, &buflen); |
| 171 | printf ("Server name (from ticket): %.*s\n", (int) buflen, buf); |
| 172 | free (buf); |
| 173 | |
| 174 | /* User is authenticated. */ |
| 175 | |
| 176 | printf ("User authenticated.\n"); |
| 177 | |
| 178 | /* Authenticate ourself to client, if request */ |
| 179 | |
| 180 | if (shishi_apreq_mutual_required_p (h, apreq)) |
| 181 | { |
| 182 | Shishi_asn1 aprep; |
| 183 | |
| 184 | printf ("Mutual authentication required.\n"); |
| 185 | |
| 186 | rc = shishi_ap_rep_asn1 (ap, &aprep); |
| 187 | if (rc != SHISHI_OK) |
| 188 | { |
| 189 | printf ("Error creating AP-REP: %s\n", shishi_strerror (rc)); |
| 190 | return NULL((void*)0); |
| 191 | } |
| 192 | |
| 193 | if (verbose) |
| 194 | shishi_encapreppart_print (h, stderrstderr, shishi_ap_encapreppart (ap)); |
| 195 | |
| 196 | shishi_aprep_print (h, stdoutstdout, aprep); |
| 197 | |
| 198 | /* We are authenticated to client */ |
| 199 | } |
| 200 | |
| 201 | return ap; |
| 202 | } |
| 203 | |
| 204 | int |
| 205 | main (int argc, char *argv[]) |
| 206 | { |
| 207 | Shishi *h; |
| 208 | Shishi_ap *ap; |
| 209 | char *sname; |
| 210 | int rc; |
| 211 | |
| 212 | printf ("sample-server (shishi " SHISHI_VERSION"1.0.3.7-c46a" ")\n"); |
| 213 | |
| 214 | if (!shishi_check_version (SHISHI_VERSION"1.0.3.7-c46a")) |
| 215 | { |
| 216 | printf ("shishi_check_version() failed:\n" |
| 217 | "Header file incompatible with shared library.\n"); |
| 218 | return 1; |
| 219 | } |
| 220 | |
| 221 | rc = shishi_init_server (&h); |
| 222 | if (rc != SHISHI_OK) |
| 223 | { |
| 224 | printf ("error initializing shishi: %s\n", shishi_strerror (rc)); |
| 225 | return 1; |
| 226 | } |
| 227 | |
| 228 | if (argc > 1) |
| 229 | sname = argv[1]; |
| 230 | else |
| 231 | sname = shishi_server_for_local_service (h, SERVICE"sample"); |
| 232 | |
| 233 | ap = auth (h, 1, shishi_principal_default (h), sname); |
| 234 | |
| 235 | if (ap) |
| 236 | rc = doit (h, ap, 1); |
| 237 | else |
| 238 | rc = 1; |
| 239 | |
| 240 | shishi_done (h); |
| 241 | |
| 242 | return rc; |
| 243 | } |