1 /* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */ 2 /* tests/gssapi/t_err.c - Test accept_sec_context error generation */ 3 /* 4 * Copyright (C) 2013 by the Massachusetts Institute of Technology. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * * Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 14 * * Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in 16 * the documentation and/or other materials provided with the 17 * distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 22 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 23 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 24 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 25 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 26 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 28 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 30 * OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* 34 * This test program verifies that the krb5 gss_accept_sec_context can produce 35 * error tokens and that gss_init_sec_context can interpret them. 36 */ 37 38 #include <stdio.h> 39 #include <stdlib.h> 40 #include <string.h> 41 #include <assert.h> 42 43 #include "common.h" 44 45 static void 46 check_replay_error(const char *msg, OM_uint32 major, OM_uint32 minor) 47 { 48 OM_uint32 tmpmin, msg_ctx = 0; 49 const char *replay = "Request is a replay"; 50 gss_buffer_desc m; 51 52 if (major != GSS_S_FAILURE) { 53 fprintf(stderr, "%s: expected major code GSS_S_FAILURE\n", msg); 54 check_gsserr(msg, major, minor); 55 exit(1); 56 } 57 58 (void)gss_display_status(&tmpmin, minor, GSS_C_MECH_CODE, GSS_C_NULL_OID, 59 &msg_ctx, &m); 60 if (m.length != strlen(replay) || memcmp(m.value, replay, m.length) != 0) { 61 fprintf(stderr, "%s: expected replay error; got %.*s\n", msg, 62 (int)m.length, (char *)m.value); 63 exit(1); 64 } 65 (void)gss_release_buffer(&tmpmin, &m); 66 } 67 68 int 69 main(int argc, char *argv[]) 70 { 71 OM_uint32 minor, major, flags; 72 gss_OID mech = &mech_krb5; 73 gss_name_t tname; 74 gss_buffer_desc itok, atok; 75 gss_ctx_id_t ictx = GSS_C_NO_CONTEXT, actx = GSS_C_NO_CONTEXT; 76 77 argv++; 78 if (*argv != NULL && strcmp(*argv, "--spnego") == 0) { 79 mech = &mech_spnego; 80 argv++; 81 } 82 if (*argv == NULL || argv[1] != NULL) { 83 fprintf(stderr, "Usage: t_err targetname\n"); 84 return 1; 85 } 86 tname = import_name(*argv); 87 88 /* Get the initial context token. */ 89 flags = GSS_C_REPLAY_FLAG | GSS_C_SEQUENCE_FLAG | GSS_C_MUTUAL_FLAG; 90 major = gss_init_sec_context(&minor, GSS_C_NO_CREDENTIAL, &ictx, tname, 91 mech, flags, GSS_C_INDEFINITE, 92 GSS_C_NO_CHANNEL_BINDINGS, GSS_C_NO_BUFFER, 93 NULL, &itok, NULL, NULL); 94 check_gsserr("gss_init_sec_context(1)", major, minor); 95 assert(major == GSS_S_CONTINUE_NEEDED); 96 97 /* Process this token into an acceptor context, then discard it. */ 98 major = gss_accept_sec_context(&minor, &actx, GSS_C_NO_CREDENTIAL, &itok, 99 GSS_C_NO_CHANNEL_BINDINGS, NULL, 100 NULL, &atok, NULL, NULL, NULL); 101 check_gsserr("gss_accept_sec_context(1)", major, minor); 102 (void)gss_release_buffer(&minor, &atok); 103 (void)gss_delete_sec_context(&minor, &actx, NULL); 104 105 /* Process the same token again, producing a replay error. */ 106 major = gss_accept_sec_context(&minor, &actx, GSS_C_NO_CREDENTIAL, &itok, 107 GSS_C_NO_CHANNEL_BINDINGS, NULL, 108 NULL, &atok, NULL, NULL, NULL); 109 check_replay_error("gss_accept_sec_context(2)", major, minor); 110 assert(atok.length != 0); 111 112 /* Send the error token back the initiator. */ 113 (void)gss_release_buffer(&minor, &itok); 114 major = gss_init_sec_context(&minor, GSS_C_NO_CREDENTIAL, &ictx, tname, 115 mech, flags, GSS_C_INDEFINITE, 116 GSS_C_NO_CHANNEL_BINDINGS, &atok, 117 NULL, &itok, NULL, NULL); 118 check_replay_error("gss_init_sec_context(2)", major, minor); 119 120 (void)gss_release_name(&minor, &tname); 121 (void)gss_release_buffer(&minor, &itok); 122 (void)gss_release_buffer(&minor, &atok); 123 (void)gss_delete_sec_context(&minor, &ictx, NULL); 124 (void)gss_delete_sec_context(&minor, &actx, NULL); 125 return 0; 126 } 127