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Diffstat (limited to '')
| -rw-r--r-- | source4/torture/krb5/kdc-heimdal.c | 1065 |
1 files changed, 1065 insertions, 0 deletions
diff --git a/source4/torture/krb5/kdc-heimdal.c b/source4/torture/krb5/kdc-heimdal.c new file mode 100644 index 0000000..2ee751b --- /dev/null +++ b/source4/torture/krb5/kdc-heimdal.c @@ -0,0 +1,1065 @@ +/* + 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/cmdline.h" +#include "source4/auth/kerberos/kerberos.h" +#include "source4/auth/kerberos/kerberos_util.h" +#include "lib/util/util_net.h" + +#define krb5_is_app_tag(dat,tag) \ + ((dat != NULL) && (dat)->length && \ + (((((char *)(dat)->data)[0] & ~0x20) == ((tag) | 0x40)))) + +#define krb5_is_krb_error(dat) krb5_is_app_tag(dat, 30) + +enum torture_krb5_test { + TORTURE_KRB5_TEST_PLAIN, + TORTURE_KRB5_TEST_PAC_REQUEST, + TORTURE_KRB5_TEST_BREAK_PW, + TORTURE_KRB5_TEST_CLOCK_SKEW, + TORTURE_KRB5_TEST_AES, + TORTURE_KRB5_TEST_RC4, + TORTURE_KRB5_TEST_AES_RC4, + + /* + * This is in and out of the client. + * Out refers to requests, in refers to replies + */ + TORTURE_KRB5_TEST_CHANGE_SERVER_OUT, + TORTURE_KRB5_TEST_CHANGE_SERVER_IN, + TORTURE_KRB5_TEST_CHANGE_SERVER_BOTH, +}; + +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; + const char *krb5_service; + const char *krb5_hostname; +}; + +/* + * 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, 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: + case TORTURE_KRB5_TEST_AES: + case TORTURE_KRB5_TEST_RC4: + case TORTURE_KRB5_TEST_AES_RC4: + case TORTURE_KRB5_TEST_CHANGE_SERVER_IN: + 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; + case TORTURE_KRB5_TEST_CHANGE_SERVER_OUT: + case TORTURE_KRB5_TEST_CHANGE_SERVER_BOTH: + { + AS_REQ mod_as_req; + krb5_error_code k5ret; + krb5_data modified_send_buf; + 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"); + + /* Only change it if configured with --option=torture:krb5-hostname= */ + if (test_context->krb5_hostname[0] == '\0') { + break; + } + + mod_as_req = test_context->as_req; + + torture_assert_int_equal(test_context->tctx, + mod_as_req.req_body.sname->name_string.len, 2, + "Sending wrong mod_as_req.req_body->sname.name_string.len"); + free(mod_as_req.req_body.sname->name_string.val[0]); + free(mod_as_req.req_body.sname->name_string.val[1]); + mod_as_req.req_body.sname->name_string.val[0] = strdup(test_context->krb5_service); + mod_as_req.req_body.sname->name_string.val[1] = strdup(test_context->krb5_hostname); + + ASN1_MALLOC_ENCODE(AS_REQ, modified_send_buf.data, modified_send_buf.length, + &mod_as_req, &used, k5ret); + torture_assert_int_equal(test_context->tctx, + k5ret, 0, + "encode_AS_REQ failed"); + + *send_buf = modified_send_buf; + break; + } + } + return true; +} + +static bool torture_check_krb5_error(struct torture_krb5_context *test_context, + const krb5_data *reply, + krb5_error_code expected_error, + bool check_pa_data) +{ + KRB_ERROR error = { 0 }; + size_t used = 0; + int rc; + + rc = decode_KRB_ERROR(reply->data, reply->length, &error, &used); + torture_assert_int_equal(test_context->tctx, + rc, 0, + "decode_KRB_ERROR failed"); + + torture_assert_int_equal(test_context->tctx, + used, reply->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, expected_error - KRB5KDC_ERR_NONE, + "Got wrong error.error_code"); + + if (check_pa_data) { + METHOD_DATA m; + size_t len; + int i; + bool found_enc_ts = false; + bool found_etype_info2 = false; + torture_assert(test_context->tctx, + error.e_data != NULL, + "No e-data returned"); + + rc = decode_METHOD_DATA(error.e_data->data, + error.e_data->length, + &m, + &len); + torture_assert_int_equal(test_context->tctx, + rc, 0, + "Got invalid method data"); + + torture_assert(test_context->tctx, + m.len > 0, + "No PA_DATA given"); + for (i = 0; i < m.len; i++) { + if (m.val[i].padata_type == KRB5_PADATA_ENC_TIMESTAMP) { + found_enc_ts = true; + } + else if (m.val[i].padata_type == KRB5_PADATA_ETYPE_INFO2) { + found_etype_info2 = true; + } + } + torture_assert(test_context->tctx, + found_etype_info2, + "PADATA_ETYPE_INFO2 not found"); + if (expected_error != KRB5KDC_ERR_PREAUTH_FAILED) + torture_assert(test_context->tctx, + found_enc_ts, + "Encrypted timestamp not found"); + } + + free_KRB_ERROR(&error); + + return true; +} + +static bool torture_check_krb5_as_rep_enctype(struct torture_krb5_context *test_context, + const krb5_data *reply, + const krb5_enctype* allowed_enctypes) +{ + ENCTYPE reply_enctype = { 0 }; + size_t used = 0; + int rc; + int expected_enctype = ETYPE_NULL; + + rc = decode_AS_REP(reply->data, + reply->length, + &test_context->as_rep, + &used); + torture_assert_int_equal(test_context->tctx, + rc, 0, + "decode_AS_REP failed"); + torture_assert_int_equal(test_context->tctx, + used, reply->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 (test_context->as_req.padata) { + /* + * If the AS-REQ contains a PA-ENC-TIMESTAMP, then + * that encryption type is used to determine the reply + * enctype. + */ + int i = 0; + const PA_DATA *pa = krb5_find_padata(test_context->as_req.padata->val, + test_context->as_req.padata->len, + KRB5_PADATA_ENC_TIMESTAMP, + &i); + if (pa) { + EncryptedData ed; + size_t len; + krb5_error_code ret = decode_EncryptedData(pa->padata_value.data, + pa->padata_value.length, + &ed, &len); + torture_assert_int_equal(test_context->tctx, + ret, + 0, + "decode_EncryptedData failed"); + expected_enctype = ed.etype; + free_EncryptedData(&ed); + } + } + if (expected_enctype == ETYPE_NULL) { + /* + * Otherwise, find the strongest enctype contained in + * the AS-REQ supported enctypes list. + */ + const krb5_enctype *p = NULL; + + for (p = krb5_kerberos_enctypes(NULL); *p != (krb5_enctype)ETYPE_NULL; ++p) { + int j; + + if ((*p == (krb5_enctype)ETYPE_AES256_CTS_HMAC_SHA1_96 || + *p == (krb5_enctype)ETYPE_AES128_CTS_HMAC_SHA1_96) && + !test_context->as_req.req_body.kdc_options.canonicalize) + { + /* + * AES encryption types are only used here when + * we set the canonicalize flag, as the salt + * needs to match. + */ + continue; + } + + for (j = 0; j < test_context->as_req.req_body.etype.len; ++j) { + krb5_enctype etype = test_context->as_req.req_body.etype.val[j]; + if (*p == etype) { + expected_enctype = etype; + break; + } + } + + if (expected_enctype != (krb5_enctype)ETYPE_NULL) { + break; + } + } + } + + { + /* Ensure the enctype to check against is an expected type. */ + const krb5_enctype *p = NULL; + bool found = false; + for (p = allowed_enctypes; *p != (krb5_enctype)ETYPE_NULL; ++p) { + if (*p == expected_enctype) { + found = true; + break; + } + } + + torture_assert(test_context->tctx, + found, + "Calculated enctype not in allowed list"); + } + + reply_enctype = test_context->as_rep.enc_part.etype; + torture_assert_int_equal(test_context->tctx, + reply_enctype, expected_enctype, + "Ticket encrypted with invalid algorithm"); + + 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, krb5_data *recv_buf) +{ + KRB_ERROR error; + size_t used; + bool ok; + + switch (test_context->test) + { + case TORTURE_KRB5_TEST_CHANGE_SERVER_OUT: + case TORTURE_KRB5_TEST_PLAIN: + if (test_context->packet_count == 0) { + ok = torture_check_krb5_error(test_context, + recv_buf, + KRB5KDC_ERR_PREAUTH_REQUIRED, + false); + torture_assert(test_context->tctx, + ok, + "torture_check_krb5_error failed"); + } 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 (test_context->test == TORTURE_KRB5_TEST_PLAIN) { + 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) { + ok = torture_check_krb5_error(test_context, + recv_buf, + KRB5KDC_ERR_PREAUTH_REQUIRED, + false); + torture_assert(test_context->tctx, + ok, + "torture_check_krb5_error failed"); + } 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"); + free_AS_REP(&test_context->as_rep); + } + 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 send the wrong password + */ + case TORTURE_KRB5_TEST_BREAK_PW: + if (test_context->packet_count == 0) { + ok = torture_check_krb5_error(test_context, + recv_buf, + KRB5KDC_ERR_PREAUTH_REQUIRED, + false); + torture_assert(test_context->tctx, + ok, + "torture_check_krb5_error failed"); + } else if (test_context->packet_count == 1) { + ok = torture_check_krb5_error(test_context, + recv_buf, + KRB5KDC_ERR_PREAUTH_FAILED, + true); + torture_assert(test_context->tctx, + ok, + "torture_check_krb5_error failed"); + } + 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) { + ok = torture_check_krb5_error(test_context, + recv_buf, + KRB5KDC_ERR_PREAUTH_REQUIRED, + false); + torture_assert(test_context->tctx, + ok, + "torture_check_krb5_error failed"); + } else if (test_context->packet_count == 1) { + ok = torture_check_krb5_error(test_context, + recv_buf, + KRB5KRB_AP_ERR_SKEW, + false); + torture_assert(test_context->tctx, + ok, + "torture_check_krb5_error failed"); + } + torture_assert(test_context->tctx, test_context->packet_count < 2, "too many packets"); + free_AS_REQ(&test_context->as_req); + break; + case TORTURE_KRB5_TEST_AES: + torture_comment(test_context->tctx, "TORTURE_KRB5_TEST_AES\n"); + + if (test_context->packet_count == 0) { + ok = torture_check_krb5_error(test_context, + recv_buf, + KRB5KDC_ERR_PREAUTH_REQUIRED, + false); + torture_assert(test_context->tctx, + ok, + "torture_check_krb5_error failed"); + } else if (krb5_is_krb_error(recv_buf)) { + ok = torture_check_krb5_error(test_context, + recv_buf, + KRB5KRB_ERR_RESPONSE_TOO_BIG, + false); + torture_assert(test_context->tctx, + ok, + "torture_check_krb5_error failed"); + } else { + const krb5_enctype allowed_enctypes[] = { + KRB5_ENCTYPE_AES256_CTS_HMAC_SHA1_96, + ETYPE_NULL + }; + ok = torture_check_krb5_as_rep_enctype(test_context, + recv_buf, + allowed_enctypes); + torture_assert(test_context->tctx, + ok, + "torture_check_krb5_as_rep_enctype failed"); + } + + torture_assert(test_context->tctx, + test_context->packet_count < 3, + "Too many packets"); + break; + case TORTURE_KRB5_TEST_RC4: + torture_comment(test_context->tctx, "TORTURE_KRB5_TEST_RC4\n"); + + if (test_context->packet_count == 0) { + ok = torture_check_krb5_error(test_context, + recv_buf, + KRB5KDC_ERR_PREAUTH_REQUIRED, + false); + torture_assert(test_context->tctx, + ok, + "torture_check_krb5_error failed"); + } else if (krb5_is_krb_error(recv_buf)) { + ok = torture_check_krb5_error(test_context, + recv_buf, + KRB5KRB_ERR_RESPONSE_TOO_BIG, + false); + torture_assert(test_context->tctx, + ok, + "torture_check_krb5_error failed"); + } else { + const krb5_enctype allowed_enctypes[] = { + KRB5_ENCTYPE_ARCFOUR_HMAC_MD5, + ETYPE_NULL + }; + ok = torture_check_krb5_as_rep_enctype(test_context, + recv_buf, + allowed_enctypes); + torture_assert(test_context->tctx, + ok, + "torture_check_krb5_as_rep_enctype failed"); + } + + torture_assert(test_context->tctx, + test_context->packet_count < 3, + "Too many packets"); + break; + case TORTURE_KRB5_TEST_AES_RC4: + torture_comment(test_context->tctx, "TORTURE_KRB5_TEST_AES_RC4\n"); + + if (test_context->packet_count == 0) { + ok = torture_check_krb5_error(test_context, + recv_buf, + KRB5KDC_ERR_PREAUTH_REQUIRED, + false); + torture_assert(test_context->tctx, + ok, + "torture_check_krb5_error failed"); + } else if (krb5_is_krb_error(recv_buf)) { + ok = torture_check_krb5_error(test_context, + recv_buf, + KRB5KRB_ERR_RESPONSE_TOO_BIG, + false); + torture_assert(test_context->tctx, + ok, + "torture_check_krb5_error failed"); + } else { + const krb5_enctype allowed_enctypes[] = { + KRB5_ENCTYPE_AES256_CTS_HMAC_SHA1_96, + KRB5_ENCTYPE_ARCFOUR_HMAC_MD5, + ETYPE_NULL + }; + ok = torture_check_krb5_as_rep_enctype(test_context, + recv_buf, + allowed_enctypes); + torture_assert(test_context->tctx, + ok, + "torture_check_krb5_as_rep_enctype failed"); + } + + torture_assert(test_context->tctx, + test_context->packet_count < 3, + "Too many packets"); + break; + case TORTURE_KRB5_TEST_CHANGE_SERVER_IN: + case TORTURE_KRB5_TEST_CHANGE_SERVER_BOTH: + { + AS_REP mod_as_rep; + krb5_error_code k5ret; + krb5_data modified_recv_buf; + if (test_context->packet_count == 0) { + ok = torture_check_krb5_error(test_context, + recv_buf, + KRB5KDC_ERR_PREAUTH_REQUIRED, + false); + torture_assert(test_context->tctx, + ok, + "torture_check_krb5_error failed"); + } 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_int_equal(test_context->tctx, + test_context->as_rep.ticket.sname.name_string.len, 2, + "Got wrong as_rep->ticket.sname.name_string.len"); + free(test_context->as_rep.ticket.sname.name_string.val[0]); + free(test_context->as_rep.ticket.sname.name_string.val[1]); + test_context->as_rep.ticket.sname.name_string.val[0] = strdup("bad"); + test_context->as_rep.ticket.sname.name_string.val[1] = strdup("mallory"); + + mod_as_rep = test_context->as_rep; + + ASN1_MALLOC_ENCODE(AS_REP, modified_recv_buf.data, modified_recv_buf.length, + &mod_as_rep, &used, k5ret); + torture_assert_int_equal(test_context->tctx, + k5ret, 0, + "encode_AS_REQ failed"); + krb5_data_free(recv_buf); + + *recv_buf = modified_recv_buf; + free_AS_REQ(&test_context->as_req); + } + torture_assert(test_context->tctx, test_context->packet_count < 3, "too many packets"); + + 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 test_krb5_send_to_realm_override( + struct smb_krb5_context *smb_krb5_context, + void *data, /* struct torture_krb5_context */ + krb5_const_realm realm, + time_t timeout, + const krb5_data *send_buf, + krb5_data *recv_buf) +{ + krb5_error_code k5ret; + bool ok; + krb5_data modified_send_buf = *send_buf; + + struct torture_krb5_context *test_context + = talloc_get_type_abort(data, struct torture_krb5_context); + + ok = torture_krb5_pre_send_test(test_context, &modified_send_buf); + if (ok == false) { + return EINVAL; + } + + k5ret = smb_krb5_send_and_recv_func_forced_tcp(smb_krb5_context, + test_context->server, + timeout, + &modified_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; + + test_context->krb5_service = torture_setting_string(tctx, "krb5-service", "host"); + test_context->krb5_hostname = torture_setting_string(tctx, "krb5-hostname", ""); + + 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 = smb_krb5_set_send_to_kdc_func((*smb_krb5_context), + test_krb5_send_to_realm_override, + NULL, /* send_to_kdc */ + 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; + krb5_context k5_context; + enum credentials_obtained obtained; + const char *error_string; + const char *password = cli_credentials_get_password(credentials); + const char *expected_principal_string; + krb5_get_init_creds_opt *krb_options = NULL; + const char *realm; + const char *krb5_hostname = torture_setting_string(tctx, "krb5-hostname", ""); + + + ok = torture_krb5_init_context(tctx, test, &smb_krb5_context); + torture_assert(tctx, ok, "torture_krb5_init_context failed"); + k5_context = smb_krb5_context->krb5_context; + + expected_principal_string + = cli_credentials_get_principal(credentials, + tctx); + + realm = strupper_talloc(tctx, cli_credentials_get_realm(credentials)); + 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: + case TORTURE_KRB5_TEST_CHANGE_SERVER_OUT: + case TORTURE_KRB5_TEST_CHANGE_SERVER_IN: + case TORTURE_KRB5_TEST_CHANGE_SERVER_BOTH: + 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; + + case TORTURE_KRB5_TEST_AES: { + static krb5_enctype etype_list[] = { KRB5_ENCTYPE_AES256_CTS_HMAC_SHA1_96 }; + + k5ret = krb5_get_init_creds_opt_alloc(smb_krb5_context->krb5_context, + &krb_options); + torture_assert_int_equal(tctx, + k5ret, 0, + "krb5_get_init_creds_opt_alloc failed"); + + krb5_get_init_creds_opt_set_etype_list(krb_options, + etype_list, + 1); + break; + } + case TORTURE_KRB5_TEST_RC4: { + static krb5_enctype etype_list[] = { KRB5_ENCTYPE_ARCFOUR_HMAC_MD5 }; + + k5ret = krb5_get_init_creds_opt_alloc(smb_krb5_context->krb5_context, + &krb_options); + torture_assert_int_equal(tctx, + k5ret, 0, + "krb5_get_init_creds_opt_alloc failed"); + + krb5_get_init_creds_opt_set_etype_list(krb_options, + etype_list, + 1); + break; + } + case TORTURE_KRB5_TEST_AES_RC4: { + static krb5_enctype etype_list[] = { KRB5_ENCTYPE_AES256_CTS_HMAC_SHA1_96, + KRB5_ENCTYPE_ARCFOUR_HMAC_MD5 }; + + k5ret = krb5_get_init_creds_opt_alloc(smb_krb5_context->krb5_context, + &krb_options); + torture_assert_int_equal(tctx, + k5ret, 0, + "krb5_get_init_creds_opt_alloc failed"); + + krb5_get_init_creds_opt_set_etype_list(krb_options, + etype_list, + 2); + break; + } + + } /* end switch */ + + 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_CHANGE_SERVER_IN: + case TORTURE_KRB5_TEST_PAC_REQUEST: + case TORTURE_KRB5_TEST_AES: + case TORTURE_KRB5_TEST_RC4: + case TORTURE_KRB5_TEST_AES_RC4: + { + char *got_principal_string; + char *assertion_message; + torture_assert_int_equal(tctx, k5ret, 0, "krb5_get_init_creds_password failed"); + + torture_assert_int_equal(tctx, + krb5_principal_get_type(k5_context, + my_creds.client), + KRB5_NT_PRINCIPAL, + "smb_krb5_init_context gave incorrect client->name.name_type"); + + torture_assert_int_equal(tctx, + krb5_unparse_name(k5_context, + my_creds.client, + &got_principal_string), 0, + "krb5_unparse_name failed"); + + assertion_message = talloc_asprintf(tctx, + "krb5_get_init_creds_password returned a different principal %s to what was expected %s", + got_principal_string, expected_principal_string); + krb5_free_unparsed_name(k5_context, got_principal_string); + + torture_assert(tctx, krb5_principal_compare(k5_context, + my_creds.client, + principal), + assertion_message); + + + torture_assert_str_equal(tctx, + my_creds.server->name.name_string.val[0], + "krbtgt", + "Mismatch in name between AS_REP and expected response, expected krbtgt"); + torture_assert_str_equal(tctx, + my_creds.server->name.name_string.val[1], + realm, + "Mismatch in realm part of krbtgt/ in AS_REP, expected krbtgt/REALM@REALM"); + + torture_assert_str_equal(tctx, + my_creds.server->realm, + realm, + "Mismatch in server realm in AS_REP, expected krbtgt/REALM@REALM"); + + 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; + + case TORTURE_KRB5_TEST_CHANGE_SERVER_OUT: + case TORTURE_KRB5_TEST_CHANGE_SERVER_BOTH: + { + char *got_principal_string; + char *assertion_message; + + if (krb5_hostname[0] != '\0') { + torture_assert_int_equal(tctx, k5ret, KRB5KRB_AP_ERR_BAD_INTEGRITY, "krb5_get_init_creds_password should have failed"); + return true; + } + + torture_assert_int_equal(tctx, k5ret, 0, "krb5_get_init_creds_password failed"); + + torture_assert_int_equal(tctx, + krb5_principal_get_type(k5_context, + my_creds.client), + KRB5_NT_PRINCIPAL, + "smb_krb5_init_context gave incorrect client->name.name_type"); + + torture_assert_int_equal(tctx, + krb5_unparse_name(k5_context, + my_creds.client, + &got_principal_string), 0, + "krb5_unparse_name failed"); + + assertion_message = talloc_asprintf(tctx, + "krb5_get_init_creds_password returned a different principal %s to what was expected %s", + got_principal_string, expected_principal_string); + krb5_free_unparsed_name(k5_context, got_principal_string); + + torture_assert(tctx, krb5_principal_compare(k5_context, + my_creds.client, + principal), + assertion_message); + + break; + } + } + + 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, samba_cmdline_get_creds(), + 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, samba_cmdline_get_creds(), + TORTURE_KRB5_TEST_PAC_REQUEST); +} + +static bool torture_krb5_as_req_break_pw(struct torture_context *tctx) +{ + return torture_krb5_as_req_creds(tctx, samba_cmdline_get_creds(), + TORTURE_KRB5_TEST_BREAK_PW); +} + +static bool torture_krb5_as_req_clock_skew(struct torture_context *tctx) +{ + return torture_krb5_as_req_creds(tctx, samba_cmdline_get_creds(), + TORTURE_KRB5_TEST_CLOCK_SKEW); +} + +static bool torture_krb5_as_req_aes(struct torture_context *tctx) +{ + return torture_krb5_as_req_creds(tctx, + samba_cmdline_get_creds(), + TORTURE_KRB5_TEST_AES); +} + +static bool torture_krb5_as_req_rc4(struct torture_context *tctx) +{ + return torture_krb5_as_req_creds(tctx, + samba_cmdline_get_creds(), + TORTURE_KRB5_TEST_RC4); +} + +static bool torture_krb5_as_req_aes_rc4(struct torture_context *tctx) +{ + return torture_krb5_as_req_creds(tctx, + samba_cmdline_get_creds(), + TORTURE_KRB5_TEST_AES_RC4); +} + +/* Checking for the "Orpheus' Lyre" attack */ +static bool torture_krb5_as_req_change_server_out(struct torture_context *tctx) +{ + return torture_krb5_as_req_creds(tctx, + samba_cmdline_get_creds(), + TORTURE_KRB5_TEST_CHANGE_SERVER_OUT); +} + +static bool torture_krb5_as_req_change_server_in(struct torture_context *tctx) +{ + return torture_krb5_as_req_creds(tctx, + samba_cmdline_get_creds(), + TORTURE_KRB5_TEST_CHANGE_SERVER_IN); +} + +static bool torture_krb5_as_req_change_server_both(struct torture_context *tctx) +{ + return torture_krb5_as_req_creds(tctx, + samba_cmdline_get_creds(), + TORTURE_KRB5_TEST_CHANGE_SERVER_BOTH); +} + +NTSTATUS torture_krb5_init(TALLOC_CTX *ctx) +{ + struct torture_suite *suite = torture_suite_create(ctx, "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_simple_test(kdc_suite, + "as-req-aes", + torture_krb5_as_req_aes); + + torture_suite_add_simple_test(kdc_suite, + "as-req-rc4", + torture_krb5_as_req_rc4); + + torture_suite_add_simple_test(kdc_suite, + "as-req-aes-rc4", + torture_krb5_as_req_aes_rc4); + + /* + * This is in and out of the client. + * Out refers to requests, in refers to replies + */ + torture_suite_add_simple_test(kdc_suite, + "as-req-change-server-in", + torture_krb5_as_req_change_server_in); + + torture_suite_add_simple_test(kdc_suite, + "as-req-change-server-out", + torture_krb5_as_req_change_server_out); + + torture_suite_add_simple_test(kdc_suite, + "as-req-change-server-both", + torture_krb5_as_req_change_server_both); + + torture_suite_add_suite(kdc_suite, torture_krb5_canon(kdc_suite)); + torture_suite_add_suite(suite, kdc_suite); + + torture_register_suite(ctx, suite); + return NT_STATUS_OK; +} |