2 * Copyright (c) 2005 Doug Rabson
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * $FreeBSD: src/lib/libgssapi/gss_krb5.c,v 1.1 2005/12/29 14:40:20 dfr Exp $
29 #include "mech_locl.h"
30 RCSID("$Id: gss_krb5.c,v 1.21 2006/11/10 00:57:27 lha Exp $");
37 gss_krb5_copy_ccache(OM_uint32 *minor_status,
41 gss_buffer_set_t data_set = GSS_C_NO_BUFFER_SET;
48 ret = gss_inquire_cred_by_oid(minor_status,
50 GSS_KRB5_COPY_CCACHE_X,
55 if (data_set == GSS_C_NO_BUFFER_SET || data_set->count != 1) {
56 gss_release_buffer_set(minor_status, &data_set);
57 *minor_status = EINVAL;
61 kret = krb5_init_context(&context);
64 gss_release_buffer_set(minor_status, &data_set);
68 kret = asprintf(&str, "%.*s", (int)data_set->elements[0].length,
69 (char *)data_set->elements[0].value);
70 gss_release_buffer_set(minor_status, &data_set);
72 *minor_status = ENOMEM;
76 kret = krb5_cc_resolve(context, str, &id);
83 kret = krb5_cc_copy_cache(context, id, out);
84 krb5_cc_close(context, id);
85 krb5_free_context(context);
95 gss_krb5_import_cred(OM_uint32 *minor_status,
97 krb5_principal keytab_principal,
101 gss_buffer_desc buffer;
102 OM_uint32 major_status;
103 krb5_context context;
109 *cred = GSS_C_NO_CREDENTIAL;
111 ret = krb5_init_context(&context);
114 return GSS_S_FAILURE;
117 sp = krb5_storage_emem();
119 *minor_status = ENOMEM;
120 major_status = GSS_S_FAILURE;
125 ret = krb5_cc_get_full_name(context, id, &str);
127 ret = krb5_store_string(sp, str);
131 ret = krb5_store_string(sp, "");
134 major_status = GSS_S_FAILURE;
138 if (keytab_principal) {
139 ret = krb5_unparse_name(context, keytab_principal, &str);
141 ret = krb5_store_string(sp, str);
145 krb5_store_string(sp, "");
148 major_status = GSS_S_FAILURE;
154 ret = krb5_kt_get_full_name(context, keytab, &str);
156 ret = krb5_store_string(sp, str);
160 krb5_store_string(sp, "");
163 major_status = GSS_S_FAILURE;
167 krb5_storage_to_data(sp, &data);
169 buffer.value = data.data;
170 buffer.length = data.length;
172 major_status = gss_set_cred_option(minor_status,
174 GSS_KRB5_IMPORT_CRED_X,
176 krb5_data_free(&data);
179 krb5_storage_free(sp);
180 krb5_free_context(context);
185 gsskrb5_register_acceptor_identity(const char *identity)
187 struct _gss_mech_switch *m;
188 gss_buffer_desc buffer;
193 buffer.value = rk_UNCONST(identity);
194 buffer.length = strlen(identity);
196 SLIST_FOREACH(m, &_gss_mechs, gm_link) {
197 if (m->gm_mech.gm_set_sec_context_option == NULL)
199 m->gm_mech.gm_set_sec_context_option(&junk, NULL,
200 GSS_KRB5_REGISTER_ACCEPTOR_IDENTITY_X, &buffer);
203 return (GSS_S_COMPLETE);
207 gsskrb5_set_dns_canonicalize(int flag)
209 struct _gss_mech_switch *m;
210 gss_buffer_desc buffer;
212 char b = (flag != 0);
217 buffer.length = sizeof(b);
219 SLIST_FOREACH(m, &_gss_mechs, gm_link) {
220 if (m->gm_mech.gm_set_sec_context_option == NULL)
222 m->gm_mech.gm_set_sec_context_option(&junk, NULL,
223 GSS_KRB5_SET_DNS_CANONICALIZE_X, &buffer);
226 return (GSS_S_COMPLETE);
231 static krb5_error_code
232 set_key(krb5_keyblock *keyblock, gss_krb5_lucid_key_t *key)
234 key->type = keyblock->keytype;
235 key->length = keyblock->keyvalue.length;
236 key->data = malloc(key->length);
237 if (key->data == NULL && key->length != 0)
239 memcpy(key->data, keyblock->keyvalue.data, key->length);
244 free_key(gss_krb5_lucid_key_t *key)
246 memset(key->data, 0, key->length);
248 memset(key, 0, sizeof(*key));
253 gss_krb5_export_lucid_sec_context(OM_uint32 *minor_status,
254 gss_ctx_id_t *context_handle,
258 krb5_context context = NULL;
260 gss_buffer_set_t data_set = GSS_C_NO_BUFFER_SET;
261 OM_uint32 major_status;
262 gss_krb5_lucid_context_v1_t *ctx = NULL;
263 krb5_storage *sp = NULL;
266 if (context_handle == NULL
267 || *context_handle == GSS_C_NO_CONTEXT
271 return GSS_S_FAILURE;
275 gss_inquire_sec_context_by_oid (minor_status,
277 GSS_KRB5_EXPORT_LUCID_CONTEXT_V1_X,
282 if (data_set == GSS_C_NO_BUFFER_SET || data_set->count != 1) {
283 gss_release_buffer_set(minor_status, &data_set);
284 *minor_status = EINVAL;
285 return GSS_S_FAILURE;
288 ret = krb5_init_context(&context);
292 ctx = calloc(1, sizeof(*ctx));
298 sp = krb5_storage_from_mem(data_set->elements[0].value,
299 data_set->elements[0].length);
305 ret = krb5_ret_uint32(sp, &num);
313 ret = krb5_ret_uint32(sp, &ctx->initiate);
316 ret = krb5_ret_uint32(sp, &ctx->endtime);
319 ret = krb5_ret_uint32(sp, &num);
321 ctx->send_seq = ((uint64_t)num) << 32;
322 ret = krb5_ret_uint32(sp, &num);
324 ctx->send_seq |= num;
326 ret = krb5_ret_uint32(sp, &num);
328 ctx->recv_seq = ((uint64_t)num) << 32;
329 ret = krb5_ret_uint32(sp, &num);
331 ctx->recv_seq |= num;
333 ret = krb5_ret_uint32(sp, &ctx->protocol);
335 if (ctx->protocol == 0) {
339 ret = krb5_ret_uint32(sp, &ctx->rfc1964_kd.sign_alg);
342 ret = krb5_ret_uint32(sp, &ctx->rfc1964_kd.seal_alg);
345 ret = krb5_ret_keyblock(sp, &key);
347 ret = set_key(&key, &ctx->rfc1964_kd.ctx_key);
348 krb5_free_keyblock_contents(context, &key);
350 } else if (ctx->protocol == 1) {
353 /* acceptor_subkey */
354 ret = krb5_ret_uint32(sp, &ctx->cfx_kd.have_acceptor_subkey);
357 ret = krb5_ret_keyblock(sp, &key);
359 ret = set_key(&key, &ctx->cfx_kd.ctx_key);
360 krb5_free_keyblock_contents(context, &key);
362 /* acceptor_subkey */
363 if (ctx->cfx_kd.have_acceptor_subkey) {
364 ret = krb5_ret_keyblock(sp, &key);
366 ret = set_key(&key, &ctx->cfx_kd.acceptor_subkey);
367 krb5_free_keyblock_contents(context, &key);
378 gss_release_buffer_set(minor_status, &data_set);
380 krb5_storage_free(sp);
382 krb5_free_context(context);
386 gss_krb5_free_lucid_sec_context(NULL, ctx);
389 return GSS_S_FAILURE;
392 return GSS_S_COMPLETE;
396 gss_krb5_free_lucid_sec_context(OM_uint32 *minor_status, void *c)
398 gss_krb5_lucid_context_v1_t *ctx = c;
400 if (ctx->version != 1) {
403 return GSS_S_FAILURE;
406 if (ctx->protocol == 0) {
407 free_key(&ctx->rfc1964_kd.ctx_key);
408 } else if (ctx->protocol == 1) {
409 free_key(&ctx->cfx_kd.ctx_key);
410 if (ctx->cfx_kd.have_acceptor_subkey)
411 free_key(&ctx->cfx_kd.acceptor_subkey);
416 return GSS_S_COMPLETE;
424 gss_krb5_set_allowable_enctypes(OM_uint32 *min_status,
426 OM_uint32 num_enctypes,
429 OM_uint32 maj_status;
430 gss_buffer_desc buffer;
434 sp = krb5_storage_emem();
436 *min_status = ENOMEM;
437 maj_status = GSS_S_FAILURE;
442 krb5_store_int32(sp, *enctypes);
446 krb5_storage_to_data(sp, &data);
448 buffer.value = data.data;
449 buffer.length = data.length;
451 maj_status = gss_set_cred_option(min_status,
453 GSS_KRB5_SET_ALLOWABLE_ENCTYPES_X,
457 krb5_storage_free(sp);
466 gsskrb5_set_send_to_kdc(struct gsskrb5_send_to_kdc *c)
468 struct _gss_mech_switch *m;
469 gss_buffer_desc buffer;
476 buffer.length = sizeof(*c);
482 SLIST_FOREACH(m, &_gss_mechs, gm_link) {
483 if (m->gm_mech.gm_set_sec_context_option == NULL)
485 m->gm_mech.gm_set_sec_context_option(&junk, NULL,
486 GSS_KRB5_SEND_TO_KDC_X, &buffer);
489 return (GSS_S_COMPLETE);
497 gsskrb5_extract_authtime_from_sec_context(OM_uint32 *minor_status,
498 gss_ctx_id_t context_handle,
501 gss_buffer_set_t data_set = GSS_C_NO_BUFFER_SET;
504 if (context_handle == GSS_C_NO_CONTEXT) {
505 *minor_status = EINVAL;
506 return GSS_S_FAILURE;
510 gss_inquire_sec_context_by_oid (minor_status,
512 GSS_KRB5_GET_AUTHTIME_X,
517 if (data_set == GSS_C_NO_BUFFER_SET) {
518 gss_release_buffer_set(minor_status, &data_set);
519 *minor_status = EINVAL;
520 return GSS_S_FAILURE;
523 if (data_set->count != 1) {
524 gss_release_buffer_set(minor_status, &data_set);
525 *minor_status = EINVAL;
526 return GSS_S_FAILURE;
529 if (data_set->elements[0].length != 4) {
530 gss_release_buffer_set(minor_status, &data_set);
531 *minor_status = EINVAL;
532 return GSS_S_FAILURE;
536 unsigned char *buf = data_set->elements[0].value;
537 *authtime = (buf[3] <<24) | (buf[2] << 16) |
538 (buf[1] << 8) | (buf[0] << 0);
541 gss_release_buffer_set(minor_status, &data_set);
544 return GSS_S_COMPLETE;
552 gsskrb5_extract_authz_data_from_sec_context(OM_uint32 *minor_status,
553 gss_ctx_id_t context_handle,
555 gss_buffer_t ad_data)
557 gss_buffer_set_t data_set = GSS_C_NO_BUFFER_SET;
559 gss_OID_desc oid_flat;
560 heim_oid baseoid, oid;
563 if (context_handle == GSS_C_NO_CONTEXT) {
564 *minor_status = EINVAL;
565 return GSS_S_FAILURE;
568 /* All this to append an integer to an oid... */
570 if (der_get_oid(GSS_KRB5_EXTRACT_AUTHZ_DATA_FROM_SEC_CONTEXT_X->elements,
571 GSS_KRB5_EXTRACT_AUTHZ_DATA_FROM_SEC_CONTEXT_X->length,
572 &baseoid, NULL) != 0) {
573 *minor_status = EINVAL;
574 return GSS_S_FAILURE;
577 oid.length = baseoid.length + 1;
578 oid.components = calloc(oid.length, sizeof(*oid.components));
579 if (oid.components == NULL) {
580 der_free_oid(&baseoid);
582 *minor_status = ENOMEM;
583 return GSS_S_FAILURE;
586 memcpy(oid.components, baseoid.components,
587 baseoid.length * sizeof(*baseoid.components));
589 der_free_oid(&baseoid);
591 oid.components[oid.length - 1] = ad_type;
593 oid_flat.length = der_length_oid(&oid);
594 oid_flat.elements = malloc(oid_flat.length);
595 if (oid_flat.elements == NULL) {
596 free(oid.components);
597 *minor_status = ENOMEM;
598 return GSS_S_FAILURE;
601 if (der_put_oid((unsigned char *)oid_flat.elements + oid_flat.length - 1,
602 oid_flat.length, &oid, &size) != 0) {
603 free(oid.components);
605 *minor_status = EINVAL;
606 return GSS_S_FAILURE;
608 if (oid_flat.length != size)
611 free(oid.components);
613 /* FINALLY, we have the OID */
615 maj_stat = gss_inquire_sec_context_by_oid (minor_status,
620 free(oid_flat.elements);
625 if (data_set == GSS_C_NO_BUFFER_SET || data_set->count != 1) {
626 gss_release_buffer_set(minor_status, &data_set);
627 *minor_status = EINVAL;
628 return GSS_S_FAILURE;
631 ad_data->value = malloc(data_set->elements[0].length);
632 if (ad_data->value == NULL) {
633 gss_release_buffer_set(minor_status, &data_set);
634 *minor_status = ENOMEM;
635 return GSS_S_FAILURE;
638 ad_data->length = data_set->elements[0].length;
639 memcpy(ad_data->value, data_set->elements[0].value, ad_data->length);
640 gss_release_buffer_set(minor_status, &data_set);
643 return GSS_S_COMPLETE;
651 gsskrb5_extract_key(OM_uint32 *minor_status,
652 gss_ctx_id_t context_handle,
654 krb5_keyblock **keyblock)
657 gss_buffer_set_t data_set = GSS_C_NO_BUFFER_SET;
658 OM_uint32 major_status;
659 krb5_context context = NULL;
660 krb5_storage *sp = NULL;
662 if (context_handle == GSS_C_NO_CONTEXT) {
664 return GSS_S_FAILURE;
667 ret = krb5_init_context(&context);
670 return GSS_S_FAILURE;
674 gss_inquire_sec_context_by_oid (minor_status,
681 if (data_set == GSS_C_NO_BUFFER_SET || data_set->count != 1) {
682 gss_release_buffer_set(minor_status, &data_set);
683 *minor_status = EINVAL;
684 return GSS_S_FAILURE;
687 sp = krb5_storage_from_mem(data_set->elements[0].value,
688 data_set->elements[0].length);
694 *keyblock = calloc(1, sizeof(**keyblock));
695 if (keyblock == NULL) {
700 ret = krb5_ret_keyblock(sp, *keyblock);
703 gss_release_buffer_set(minor_status, &data_set);
705 krb5_storage_free(sp);
706 if (ret && keyblock) {
707 krb5_free_keyblock(context, *keyblock);
711 krb5_free_context(context);
715 return GSS_S_FAILURE;
717 return GSS_S_COMPLETE;
725 gsskrb5_extract_service_keyblock(OM_uint32 *minor_status,
726 gss_ctx_id_t context_handle,
727 krb5_keyblock **keyblock)
729 return gsskrb5_extract_key(minor_status,
731 GSS_KRB5_GET_SERVICE_KEYBLOCK_X,
736 gsskrb5_get_initiator_subkey(OM_uint32 *minor_status,
737 gss_ctx_id_t context_handle,
738 krb5_keyblock **keyblock)
740 return gsskrb5_extract_key(minor_status,
742 GSS_KRB5_GET_INITIATOR_SUBKEY_X,
747 gsskrb5_get_subkey(OM_uint32 *minor_status,
748 gss_ctx_id_t context_handle,
749 krb5_keyblock **keyblock)
751 return gsskrb5_extract_key(minor_status,
753 GSS_KRB5_GET_SUBKEY_X,
758 gsskrb5_set_default_realm(const char *realm)
760 struct _gss_mech_switch *m;
761 gss_buffer_desc buffer;
766 buffer.value = rk_UNCONST(realm);
767 buffer.length = strlen(realm);
769 SLIST_FOREACH(m, &_gss_mechs, gm_link) {
770 if (m->gm_mech.gm_set_sec_context_option == NULL)
772 m->gm_mech.gm_set_sec_context_option(&junk, NULL,
773 GSS_KRB5_SET_DEFAULT_REALM_X, &buffer);
776 return (GSS_S_COMPLETE);