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/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
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/* tests/replay.c - test replay cache using libkrb5 functions */
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/*
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* Copyright (C) 2019 by the Massachusetts Institute of Technology.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "k5-int.h"
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int
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main(int argc, char **argv)
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{
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krb5_error_code ret;
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krb5_context ctx;
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krb5_auth_context c_authcon, s_authcon, s_authcon2;
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krb5_rcache rc;
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krb5_ccache cc;
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krb5_principal client, server;
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krb5_creds mcred, *cred, **tmpcreds;
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krb5_data der_apreq, der_krbsafe, der_krbpriv, *der_krbcred, tmpdata;
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krb5_address addr;
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struct in_addr inaddr;
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const char *server_name;
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assert(argc == 2);
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server_name = argv[1];
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/* Create client and server auth contexts. (They will use a replay cache
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* by default.) */
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ret = krb5_init_context(&ctx;;
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assert(ret == 0);
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ret = krb5_auth_con_init(ctx, &c_authcon);
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assert(ret == 0);
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ret = krb5_auth_con_init(ctx, &s_authcon);
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assert(ret == 0);
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/* Set dummy addresses for the auth contexts. */
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memset(&inaddr, 0, sizeof(inaddr));
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addr.addrtype = ADDRTYPE_INET;
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addr.length = sizeof(inaddr);
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addr.contents = (uint8_t *)&inaddr;
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ret = krb5_auth_con_setaddrs(ctx, c_authcon, &addr, &addr);
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assert(ret == 0);
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ret = krb5_auth_con_setaddrs(ctx, s_authcon, &addr, &addr);
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assert(ret == 0);
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/* Set up replay caches for the auth contexts. */
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tmpdata = string2data("testclient");
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ret = krb5_get_server_rcache(ctx, &tmpdata, &rc);
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assert(ret == 0);
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ret = krb5_auth_con_setrcache(ctx, c_authcon, rc);
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assert(ret == 0);
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tmpdata = string2data("testserver");
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ret = krb5_get_server_rcache(ctx, &tmpdata, &rc);
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assert(ret == 0);
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ret = krb5_auth_con_setrcache(ctx, s_authcon, rc);
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assert(ret == 0);
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/* Construct the client and server principal names. */
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ret = krb5_cc_default(ctx, &cc);
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assert(ret == 0);
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ret = krb5_cc_get_principal(ctx, cc, &client);
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assert(ret == 0);
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ret = krb5_parse_name(ctx, server_name, &server);
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assert(ret == 0);
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/* Get credentials for the client. */
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memset(&mcred, 0, sizeof(mcred));
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mcred.client = client;
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mcred.server = server;
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ret = krb5_get_credentials(ctx, 0, cc, &mcred, &cred);
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assert(ret == 0);
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/* Send an AP-REP to establish the sessions. */
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ret = krb5_mk_req_extended(ctx, &c_authcon, 0, NULL, cred, &der_apreq);
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assert(ret == 0);
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ret = krb5_rd_req(ctx, &s_authcon, &der_apreq, NULL, NULL, NULL, NULL);
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assert(ret == 0);
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/* Set up another server auth context with the same rcache name and replay
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* the AP-REQ. */
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ret = krb5_auth_con_init(ctx, &s_authcon2);
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assert(ret == 0);
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tmpdata = string2data("testserver");
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ret = krb5_get_server_rcache(ctx, &tmpdata, &rc);
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assert(ret == 0);
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ret = krb5_auth_con_setrcache(ctx, s_authcon2, rc);
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assert(ret == 0);
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ret = krb5_rd_req(ctx, &s_authcon2, &der_apreq, NULL, NULL, NULL, NULL);
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assert(ret == KRB5KRB_AP_ERR_REPEAT);
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krb5_auth_con_free(ctx, s_authcon2);
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/* Make a KRB-SAFE message with the client auth context. */
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tmpdata = string2data("safemsg");
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ret = krb5_mk_safe(ctx, c_authcon, &tmpdata, &der_krbsafe, NULL);
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assert(ret == 0);
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/* Play it back to the client to detect a reflection. */
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ret = krb5_rd_safe(ctx, c_authcon, &der_krbsafe, &tmpdata, NULL);
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assert(ret == KRB5KRB_AP_ERR_REPEAT);
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/* Send it to the server auth context twice, to detect a replay. */
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ret = krb5_rd_safe(ctx, s_authcon, &der_krbsafe, &tmpdata, NULL);
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assert(ret == 0);
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krb5_free_data_contents(ctx, &tmpdata);
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ret = krb5_rd_safe(ctx, s_authcon, &der_krbsafe, &tmpdata, NULL);
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assert(ret == KRB5KRB_AP_ERR_REPEAT);
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/* Make a KRB-PRIV message with the client auth context. */
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tmpdata = string2data("safemsg");
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ret = krb5_mk_priv(ctx, c_authcon, &tmpdata, &der_krbpriv, NULL);
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assert(ret == 0);
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/* Play it back to the client to detect a reflection. */
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ret = krb5_rd_priv(ctx, c_authcon, &der_krbpriv, &tmpdata, NULL);
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assert(ret == KRB5KRB_AP_ERR_REPEAT);
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/* Send it to the server auth context twice, to detect a replay. */
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ret = krb5_rd_priv(ctx, s_authcon, &der_krbpriv, &tmpdata, NULL);
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assert(ret == 0);
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krb5_free_data_contents(ctx, &tmpdata);
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ret = krb5_rd_priv(ctx, s_authcon, &der_krbpriv, &tmpdata, NULL);
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assert(ret == KRB5KRB_AP_ERR_REPEAT);
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/* Make a KRB-CRED message with the client auth context. */
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tmpdata = string2data("safemsg");
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ret = krb5_mk_1cred(ctx, c_authcon, cred, &der_krbcred, NULL);
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assert(ret == 0);
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/* Play it back to the client to detect a reflection. */
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ret = krb5_rd_cred(ctx, c_authcon, der_krbcred, &tmpcreds, NULL);
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assert(ret == KRB5KRB_AP_ERR_REPEAT);
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/* Send it to the server auth context twice, to detect a replay. */
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ret = krb5_rd_cred(ctx, s_authcon, der_krbcred, &tmpcreds, NULL);
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assert(ret == 0);
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krb5_free_tgt_creds(ctx, tmpcreds);
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ret = krb5_rd_cred(ctx, s_authcon, der_krbcred, &tmpcreds, NULL);
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assert(ret == KRB5KRB_AP_ERR_REPEAT);
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krb5_free_data_contents(ctx, &der_apreq);
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krb5_free_data_contents(ctx, &der_krbsafe);
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krb5_free_data_contents(ctx, &der_krbpriv);
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krb5_free_data(ctx, der_krbcred);
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krb5_free_creds(ctx, cred);
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krb5_cc_close(ctx, cc);
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krb5_free_principal(ctx, client);
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krb5_free_principal(ctx, server);
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krb5_auth_con_free(ctx, c_authcon);
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krb5_auth_con_free(ctx, s_authcon);
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krb5_free_context(ctx);
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return 0;
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}
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