diff options
Diffstat (limited to 'source4/torture/krb5/kdc-heimdal.c')
| -rw-r--r-- | source4/torture/krb5/kdc-heimdal.c | 444 |
1 files changed, 444 insertions, 0 deletions
diff --git a/source4/torture/krb5/kdc-heimdal.c b/source4/torture/krb5/kdc-heimdal.c new file mode 100644 index 00000000000..fffe773e21b --- /dev/null +++ b/source4/torture/krb5/kdc-heimdal.c @@ -0,0 +1,444 @@ +/* + Unix SMB/CIFS implementation. + + Validate the krb5 pac generation routines + + Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005-2015 + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. +*/ + +#include "includes.h" +#include "system/kerberos.h" +#include "torture/smbtorture.h" +#include "torture/winbind/proto.h" +#include "torture/krb5/proto.h" +#include "auth/credentials/credentials.h" +#include "lib/cmdline/popt_common.h" +#include "source4/auth/kerberos/kerberos.h" +#include "source4/auth/kerberos/kerberos_util.h" +#include "lib/util/util_net.h" + +enum torture_krb5_test { + TORTURE_KRB5_TEST_PLAIN, + TORTURE_KRB5_TEST_PAC_REQUEST, + TORTURE_KRB5_TEST_BREAK_PW, + TORTURE_KRB5_TEST_CLOCK_SKEW, +}; + +struct torture_krb5_context { + struct torture_context *tctx; + struct addrinfo *server; + enum torture_krb5_test test; + int packet_count; + AS_REQ as_req; + AS_REP as_rep; +}; + +/* + * Confirm that the outgoing packet meets certain expectations. This + * should be extended to further assert the correct and expected + * behaviour of the krb5 libs, so we know what we are sending to the + * server. + * + */ + +static bool torture_krb5_pre_send_test(struct torture_krb5_context *test_context, const krb5_data *send_buf) +{ + size_t used; + switch (test_context->test) + { + case TORTURE_KRB5_TEST_PLAIN: + case TORTURE_KRB5_TEST_PAC_REQUEST: + case TORTURE_KRB5_TEST_BREAK_PW: + case TORTURE_KRB5_TEST_CLOCK_SKEW: + torture_assert_int_equal(test_context->tctx, + decode_AS_REQ(send_buf->data, send_buf->length, &test_context->as_req, &used), 0, + "decode_AS_REQ failed"); + torture_assert_int_equal(test_context->tctx, used, send_buf->length, "length mismatch"); + torture_assert_int_equal(test_context->tctx, test_context->as_req.pvno, 5, "Got wrong as_req->pvno"); + break; + } + return true; +} + +/* + * Confirm that the incoming packet from the KDC meets certain + * expectations. This uses a switch and the packet count to work out + * what test we are in, and where in the test we are, so we can assert + * on the expected reply packets from the KDC. + * + */ + +static bool torture_krb5_post_recv_test(struct torture_krb5_context *test_context, const krb5_data *recv_buf) +{ + KRB_ERROR error; + size_t used; + switch (test_context->test) + { + case TORTURE_KRB5_TEST_PLAIN: + if (test_context->packet_count == 0) { + torture_assert_int_equal(test_context->tctx, + decode_KRB_ERROR(recv_buf->data, recv_buf->length, &error, &used), 0, + "decode_AS_REP failed"); + torture_assert_int_equal(test_context->tctx, used, recv_buf->length, "length mismatch"); + torture_assert_int_equal(test_context->tctx, error.pvno, 5, "Got wrong error.pvno"); + torture_assert_int_equal(test_context->tctx, error.error_code, KRB5KDC_ERR_PREAUTH_REQUIRED - KRB5KDC_ERR_NONE, + "Got wrong error.error_code"); + free_KRB_ERROR(&error); + } else if ((decode_KRB_ERROR(recv_buf->data, recv_buf->length, &error, &used) == 0) + && (test_context->packet_count == 1)) { + torture_assert_int_equal(test_context->tctx, used, recv_buf->length, "length mismatch"); + torture_assert_int_equal(test_context->tctx, error.pvno, 5, "Got wrong error.pvno"); + torture_assert_int_equal(test_context->tctx, error.error_code, KRB5KRB_ERR_RESPONSE_TOO_BIG - KRB5KDC_ERR_NONE, + "Got wrong error.error_code"); + free_KRB_ERROR(&error); + } else { + torture_assert_int_equal(test_context->tctx, + decode_AS_REP(recv_buf->data, recv_buf->length, &test_context->as_rep, &used), 0, + "decode_AS_REP failed"); + torture_assert_int_equal(test_context->tctx, used, recv_buf->length, "length mismatch"); + torture_assert_int_equal(test_context->tctx, + test_context->as_rep.pvno, 5, + "Got wrong as_rep->pvno"); + torture_assert_int_equal(test_context->tctx, + test_context->as_rep.ticket.tkt_vno, 5, + "Got wrong as_rep->ticket.tkt_vno"); + torture_assert(test_context->tctx, + test_context->as_rep.ticket.enc_part.kvno, + "Did not get a KVNO in test_context->as_rep.ticket.enc_part.kvno"); + if (torture_setting_bool(test_context->tctx, "expect_cached_at_rodc", false)) { + torture_assert_int_not_equal(test_context->tctx, + *test_context->as_rep.ticket.enc_part.kvno & 0xFFFF0000, + 0, "Did not get a RODC number in the KVNO"); + } else { + torture_assert_int_equal(test_context->tctx, + *test_context->as_rep.ticket.enc_part.kvno & 0xFFFF0000, + 0, "Unexpecedly got a RODC number in the KVNO"); + } + free_AS_REP(&test_context->as_rep); + } + torture_assert(test_context->tctx, test_context->packet_count < 3, "too many packets"); + free_AS_REQ(&test_context->as_req); + break; + + /* + * Confirm correct error codes when we ask for the PAC. This behaviour is rather odd... + */ + case TORTURE_KRB5_TEST_PAC_REQUEST: + if (test_context->packet_count == 0) { + torture_assert_int_equal(test_context->tctx, + decode_KRB_ERROR(recv_buf->data, recv_buf->length, &error, &used), 0, + "decode_AS_REP failed"); + torture_assert_int_equal(test_context->tctx, used, recv_buf->length, "length mismatch"); + torture_assert_int_equal(test_context->tctx, error.pvno, 5, "Got wrong error.pvno"); + torture_assert_int_equal(test_context->tctx, error.error_code, KRB5KRB_ERR_RESPONSE_TOO_BIG - KRB5KDC_ERR_NONE, + "Got wrong error.error_code"); + free_KRB_ERROR(&error); + } else if (test_context->packet_count == 1) { + torture_assert_int_equal(test_context->tctx, + decode_KRB_ERROR(recv_buf->data, recv_buf->length, &error, &used), 0, + "decode_AS_REP failed"); + torture_assert_int_equal(test_context->tctx, used, recv_buf->length, "length mismatch"); + torture_assert_int_equal(test_context->tctx, error.pvno, 5, "Got wrong error.pvno"); + torture_assert_int_equal(test_context->tctx, error.error_code, KRB5KDC_ERR_PREAUTH_REQUIRED - KRB5KDC_ERR_NONE, + "Got wrong error.error_code"); + free_KRB_ERROR(&error); + } else if ((decode_KRB_ERROR(recv_buf->data, recv_buf->length, &error, &used) == 0) + && (test_context->packet_count == 2)) { + torture_assert_int_equal(test_context->tctx, used, recv_buf->length, "length mismatch"); + torture_assert_int_equal(test_context->tctx, error.pvno, 5, "Got wrong error.pvno"); + torture_assert_int_equal(test_context->tctx, error.error_code, KRB5KRB_ERR_RESPONSE_TOO_BIG - KRB5KDC_ERR_NONE, + "Got wrong error.error_code"); + free_KRB_ERROR(&error); + } else { + torture_assert_int_equal(test_context->tctx, + decode_AS_REP(recv_buf->data, recv_buf->length, &test_context->as_rep, &used), 0, + "decode_AS_REP failed"); + torture_assert_int_equal(test_context->tctx, used, recv_buf->length, "length mismatch"); + torture_assert_int_equal(test_context->tctx, test_context->as_rep.pvno, 5, "Got wrong as_rep->pvno"); + free_AS_REP(&test_context->as_rep); + } + torture_assert(test_context->tctx, test_context->packet_count < 3, "too many packets"); + free_AS_REQ(&test_context->as_req); + break; + + /* + * Confirm correct error codes when we deliberatly send the wrong password + */ + case TORTURE_KRB5_TEST_BREAK_PW: + if (test_context->packet_count == 0) { + torture_assert_int_equal(test_context->tctx, + decode_KRB_ERROR(recv_buf->data, recv_buf->length, &error, &used), 0, + "decode_AS_REP failed"); + torture_assert_int_equal(test_context->tctx, used, recv_buf->length, "length mismatch"); + torture_assert_int_equal(test_context->tctx, error.pvno, 5, "Got wrong error.pvno"); + torture_assert_int_equal(test_context->tctx, error.error_code, KRB5KDC_ERR_PREAUTH_REQUIRED - KRB5KDC_ERR_NONE, + "Got wrong error.error_code"); + free_KRB_ERROR(&error); + } else if (test_context->packet_count == 1) { + torture_assert_int_equal(test_context->tctx, + decode_KRB_ERROR(recv_buf->data, recv_buf->length, &error, &used), 0, + "decode_AS_REP failed"); + torture_assert_int_equal(test_context->tctx, used, recv_buf->length, "length mismatch"); + torture_assert_int_equal(test_context->tctx, error.pvno, 5, "Got wrong error.pvno"); + torture_assert_int_equal(test_context->tctx, error.error_code, KRB5KDC_ERR_PREAUTH_FAILED - KRB5KDC_ERR_NONE, + "Got wrong error.error_code"); + free_KRB_ERROR(&error); + } + torture_assert(test_context->tctx, test_context->packet_count < 2, "too many packets"); + free_AS_REQ(&test_context->as_req); + break; + + /* + * Confirm correct error codes when we deliberatly skew the client clock + */ + case TORTURE_KRB5_TEST_CLOCK_SKEW: + if (test_context->packet_count == 0) { + torture_assert_int_equal(test_context->tctx, + decode_KRB_ERROR(recv_buf->data, recv_buf->length, &error, &used), 0, + "decode_AS_REP failed"); + torture_assert_int_equal(test_context->tctx, used, recv_buf->length, "length mismatch"); + torture_assert_int_equal(test_context->tctx, error.pvno, 5, "Got wrong error.pvno"); + torture_assert_int_equal(test_context->tctx, error.error_code, KRB5KDC_ERR_PREAUTH_REQUIRED - KRB5KDC_ERR_NONE, + "Got wrong error.error_code"); + free_KRB_ERROR(&error); + } else if (test_context->packet_count == 1) { + torture_assert_int_equal(test_context->tctx, + decode_KRB_ERROR(recv_buf->data, recv_buf->length, &error, &used), 0, + "decode_AS_REP failed"); + torture_assert_int_equal(test_context->tctx, used, recv_buf->length, "length mismatch"); + torture_assert_int_equal(test_context->tctx, error.pvno, 5, "Got wrong error.pvno"); + torture_assert_int_equal(test_context->tctx, error.error_code, KRB5KRB_AP_ERR_SKEW - KRB5KDC_ERR_NONE, + "Got wrong error.error_code"); + free_KRB_ERROR(&error); + } + torture_assert(test_context->tctx, test_context->packet_count < 2, "too many packets"); + free_AS_REQ(&test_context->as_req); + break; + } + return true; +} + + +/* + * This function is set in torture_krb5_init_context as krb5 + * send_and_recv function. This allows us to override what server the + * test is aimed at, and to inspect the packets just before they are + * sent to the network, and before they are processed on the recv + * side. + * + * The torture_krb5_pre_send_test() and torture_krb5_post_recv_test() + * functions are implement the actual tests. + * + * When this asserts, the caller will get a spurious 'cannot contact + * any KDC' message. + * + */ +static krb5_error_code smb_krb5_send_and_recv_func_override(krb5_context context, + void *data, /* struct torture_krb5_context */ + krb5_krbhst_info *hi, + time_t timeout, + const krb5_data *send_buf, + krb5_data *recv_buf) +{ + krb5_error_code k5ret; + bool ok; + + struct torture_krb5_context *test_context + = talloc_get_type_abort(data, struct torture_krb5_context); + + ok = torture_krb5_pre_send_test(test_context, send_buf); + if (ok == false) { + return EINVAL; + } + + k5ret = smb_krb5_send_and_recv_func_forced(context, test_context->server, + hi, timeout, send_buf, recv_buf); + if (k5ret != 0) { + return k5ret; + } + ok = torture_krb5_post_recv_test(test_context, recv_buf); + if (ok == false) { + return EINVAL; + } + + test_context->packet_count++; + + return k5ret; +} + +static int test_context_destructor(struct torture_krb5_context *test_context) +{ + freeaddrinfo(test_context->server); + return 0; +} + + +static bool torture_krb5_init_context(struct torture_context *tctx, + enum torture_krb5_test test, + struct smb_krb5_context **smb_krb5_context) +{ + const char *host = torture_setting_string(tctx, "host", NULL); + krb5_error_code k5ret; + bool ok; + + struct torture_krb5_context *test_context = talloc_zero(tctx, struct torture_krb5_context); + torture_assert(tctx, test_context != NULL, "Failed to allocate"); + + test_context->test = test; + test_context->tctx = tctx; + + k5ret = smb_krb5_init_context(tctx, tctx->lp_ctx, smb_krb5_context); + torture_assert_int_equal(tctx, k5ret, 0, "smb_krb5_init_context failed"); + + ok = interpret_string_addr_internal(&test_context->server, host, AI_NUMERICHOST); + torture_assert(tctx, ok, "Failed to parse target server"); + + talloc_set_destructor(test_context, test_context_destructor); + + set_sockaddr_port(test_context->server->ai_addr, 88); + + k5ret = krb5_set_send_to_kdc_func((*smb_krb5_context)->krb5_context, + smb_krb5_send_and_recv_func_override, + test_context); + torture_assert_int_equal(tctx, k5ret, 0, "krb5_set_send_to_kdc_func failed"); + return true; +} + +static bool torture_krb5_as_req_creds(struct torture_context *tctx, + struct cli_credentials *credentials, + enum torture_krb5_test test) +{ + krb5_error_code k5ret; + bool ok; + krb5_creds my_creds; + krb5_principal principal; + struct smb_krb5_context *smb_krb5_context; + enum credentials_obtained obtained; + const char *error_string; + const char *password = cli_credentials_get_password(credentials); + krb5_get_init_creds_opt *krb_options = NULL; + + ok = torture_krb5_init_context(tctx, test, &smb_krb5_context); + torture_assert(tctx, ok, "torture_krb5_init_context failed"); + + k5ret = principal_from_credentials(tctx, credentials, smb_krb5_context, + &principal, &obtained, &error_string); + torture_assert_int_equal(tctx, k5ret, 0, error_string); + + switch (test) + { + case TORTURE_KRB5_TEST_PLAIN: + break; + + case TORTURE_KRB5_TEST_PAC_REQUEST: + torture_assert_int_equal(tctx, + krb5_get_init_creds_opt_alloc(smb_krb5_context->krb5_context, &krb_options), + 0, "krb5_get_init_creds_opt_alloc failed"); + + torture_assert_int_equal(tctx, + krb5_get_init_creds_opt_set_pac_request(smb_krb5_context->krb5_context, krb_options, true), + 0, "krb5_get_init_creds_opt_set_pac_request failed"); + break; + + case TORTURE_KRB5_TEST_BREAK_PW: + password = "NOT the password"; + break; + + case TORTURE_KRB5_TEST_CLOCK_SKEW: + torture_assert_int_equal(tctx, + krb5_set_real_time(smb_krb5_context->krb5_context, time(NULL) + 3600, 0), + 0, "krb5_set_real_time failed"); + break; + + break; + } + k5ret = krb5_get_init_creds_password(smb_krb5_context->krb5_context, &my_creds, principal, + password, NULL, NULL, 0, + NULL, krb_options); + krb5_get_init_creds_opt_free(smb_krb5_context->krb5_context, krb_options); + + switch (test) + { + case TORTURE_KRB5_TEST_PLAIN: + case TORTURE_KRB5_TEST_PAC_REQUEST: + torture_assert_int_equal(tctx, k5ret, 0, "krb5_get_init_creds_password failed"); + break; + + case TORTURE_KRB5_TEST_BREAK_PW: + torture_assert_int_equal(tctx, k5ret, KRB5KDC_ERR_PREAUTH_FAILED, "krb5_get_init_creds_password should have failed"); + return true; + + case TORTURE_KRB5_TEST_CLOCK_SKEW: + torture_assert_int_equal(tctx, k5ret, KRB5KRB_AP_ERR_SKEW, "krb5_get_init_creds_password should have failed"); + return true; + + } + + k5ret = krb5_free_cred_contents(smb_krb5_context->krb5_context, &my_creds); + torture_assert_int_equal(tctx, k5ret, 0, "krb5_free_creds failed"); + + return true; +} + +static bool torture_krb5_as_req_cmdline(struct torture_context *tctx) +{ + return torture_krb5_as_req_creds(tctx, cmdline_credentials, TORTURE_KRB5_TEST_PLAIN); +} + +static bool torture_krb5_as_req_pac_request(struct torture_context *tctx) +{ + if (torture_setting_bool(tctx, "expect_rodc", false)) { + torture_skip(tctx, "This test needs further investigation in the RODC case against a Windows DC, in particular with non-cached users"); + } + return torture_krb5_as_req_creds(tctx, cmdline_credentials, TORTURE_KRB5_TEST_PAC_REQUEST); +} + +static bool torture_krb5_as_req_break_pw(struct torture_context *tctx) +{ + return torture_krb5_as_req_creds(tctx, cmdline_credentials, TORTURE_KRB5_TEST_BREAK_PW); +} + +static bool torture_krb5_as_req_clock_skew(struct torture_context *tctx) +{ + return torture_krb5_as_req_creds(tctx, cmdline_credentials, TORTURE_KRB5_TEST_CLOCK_SKEW); +} + +NTSTATUS torture_krb5_init(void) +{ + struct torture_suite *suite = torture_suite_create(talloc_autofree_context(), "krb5"); + struct torture_suite *kdc_suite = torture_suite_create(suite, "kdc"); + suite->description = talloc_strdup(suite, "Kerberos tests"); + kdc_suite->description = talloc_strdup(kdc_suite, "Kerberos KDC tests"); + + torture_suite_add_simple_test(kdc_suite, "as-req-cmdline", + torture_krb5_as_req_cmdline); + + torture_suite_add_simple_test(kdc_suite, "as-req-pac-request", + torture_krb5_as_req_pac_request); + + torture_suite_add_simple_test(kdc_suite, "as-req-break-pw", + torture_krb5_as_req_break_pw); + + torture_suite_add_simple_test(kdc_suite, "as-req-clock-skew", + torture_krb5_as_req_clock_skew); + + torture_suite_add_suite(kdc_suite, torture_krb5_canon(kdc_suite)); + torture_suite_add_suite(suite, kdc_suite); + + torture_register_suite(suite); + return NT_STATUS_OK; +} |