diff options
Diffstat (limited to 'source4/auth/kerberos/krb5_init_context.c')
| -rw-r--r-- | source4/auth/kerberos/krb5_init_context.c | 885 |
1 files changed, 885 insertions, 0 deletions
diff --git a/source4/auth/kerberos/krb5_init_context.c b/source4/auth/kerberos/krb5_init_context.c new file mode 100644 index 0000000..e8114af --- /dev/null +++ b/source4/auth/kerberos/krb5_init_context.c @@ -0,0 +1,885 @@ +/* + Unix SMB/CIFS implementation. + Wrapper for krb5_init_context + + Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005 + Copyright (C) Andrew Tridgell 2005 + Copyright (C) Stefan Metzmacher 2004 + + 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 <tevent.h> +#include "auth/kerberos/kerberos.h" +#include "lib/socket/socket.h" +#include "lib/stream/packet.h" +#include "system/network.h" +#include "param/param.h" +#include "libcli/resolve/resolve.h" +#include "../lib/tsocket/tsocket.h" +#include "krb5_init_context.h" +#ifdef SAMBA4_USES_HEIMDAL +#include "../lib/dbwrap/dbwrap.h" +#include "../lib/dbwrap/dbwrap_rbt.h" +#include "../lib/util/util_tdb.h" +#include <krb5/send_to_kdc_plugin.h> +#endif + +/* + context structure for operations on cldap packets +*/ +struct smb_krb5_socket { + struct socket_context *sock; + + /* the fd event */ + struct tevent_fd *fde; + + NTSTATUS status; + DATA_BLOB request, reply; + + struct packet_context *packet; + + size_t partial_read; +#ifdef SAMBA4_USES_HEIMDAL + krb5_krbhst_info *hi; +#endif +}; + +static krb5_error_code smb_krb5_context_destroy(struct smb_krb5_context *ctx) +{ +#ifdef SAMBA4_USES_HEIMDAL + if (ctx->pvt_log_data) { + /* Otherwise krb5_free_context will try and close what we + * have already free()ed */ + krb5_set_warn_dest(ctx->krb5_context, NULL); + krb5_closelog(ctx->krb5_context, + (krb5_log_facility *)ctx->pvt_log_data); + } +#endif + krb5_free_context(ctx->krb5_context); + return 0; +} + +#ifdef SAMBA4_USES_HEIMDAL +/* We never close down the DEBUG system, and no need to unreference the use */ +static void smb_krb5_debug_close(void *private_data) { + return; +} +#endif + +#ifdef SAMBA4_USES_HEIMDAL +static void smb_krb5_debug_wrapper( +#ifdef HAVE_KRB5_ADDLOG_FUNC_NEED_CONTEXT + krb5_context ctx, +#endif /* HAVE_KRB5_ADDLOG_FUNC_NEED_CONTEXT */ + const char *timestr, const char *msg, void *private_data) +{ + DEBUGC(DBGC_KERBEROS, 3, ("Kerberos: %s\n", msg)); +} +#endif + +#ifdef SAMBA4_USES_HEIMDAL +/* + handle recv events on a smb_krb5 socket +*/ +static void smb_krb5_socket_recv(struct smb_krb5_socket *smb_krb5) +{ + TALLOC_CTX *tmp_ctx = talloc_new(smb_krb5); + DATA_BLOB blob; + size_t nread, dsize; + + smb_krb5->status = socket_pending(smb_krb5->sock, &dsize); + if (!NT_STATUS_IS_OK(smb_krb5->status)) { + talloc_free(tmp_ctx); + return; + } + + blob = data_blob_talloc(tmp_ctx, NULL, dsize); + if (blob.data == NULL && dsize != 0) { + smb_krb5->status = NT_STATUS_NO_MEMORY; + talloc_free(tmp_ctx); + return; + } + + smb_krb5->status = socket_recv(smb_krb5->sock, blob.data, blob.length, &nread); + if (!NT_STATUS_IS_OK(smb_krb5->status)) { + talloc_free(tmp_ctx); + return; + } + blob.length = nread; + + if (nread == 0) { + smb_krb5->status = NT_STATUS_UNEXPECTED_NETWORK_ERROR; + talloc_free(tmp_ctx); + return; + } + + DEBUG(4,("Received smb_krb5 packet of length %d\n", + (int)blob.length)); + + talloc_steal(smb_krb5, blob.data); + smb_krb5->reply = blob; + talloc_free(tmp_ctx); +} + +static NTSTATUS smb_krb5_full_packet(void *private_data, DATA_BLOB data) +{ + struct smb_krb5_socket *smb_krb5 = talloc_get_type(private_data, struct smb_krb5_socket); + talloc_steal(smb_krb5, data.data); + smb_krb5->reply = data; + smb_krb5->reply.length -= 4; + smb_krb5->reply.data += 4; + return NT_STATUS_OK; +} + +/* + handle request timeouts +*/ +static void smb_krb5_request_timeout(struct tevent_context *event_ctx, + struct tevent_timer *te, struct timeval t, + void *private_data) +{ + struct smb_krb5_socket *smb_krb5 = talloc_get_type(private_data, struct smb_krb5_socket); + DEBUG(5,("Timed out smb_krb5 packet\n")); + smb_krb5->status = NT_STATUS_IO_TIMEOUT; +} + +static void smb_krb5_error_handler(void *private_data, NTSTATUS status) +{ + struct smb_krb5_socket *smb_krb5 = talloc_get_type(private_data, struct smb_krb5_socket); + smb_krb5->status = status; +} + +/* + handle send events on a smb_krb5 socket +*/ +static void smb_krb5_socket_send(struct smb_krb5_socket *smb_krb5) +{ + NTSTATUS status; + + size_t len; + + len = smb_krb5->request.length; + status = socket_send(smb_krb5->sock, &smb_krb5->request, &len); + + if (!NT_STATUS_IS_OK(status)) return; + + TEVENT_FD_READABLE(smb_krb5->fde); + + TEVENT_FD_NOT_WRITEABLE(smb_krb5->fde); + return; +} + + +/* + handle fd events on a smb_krb5_socket +*/ +static void smb_krb5_socket_handler(struct tevent_context *ev, struct tevent_fd *fde, + uint16_t flags, void *private_data) +{ + struct smb_krb5_socket *smb_krb5 = talloc_get_type(private_data, struct smb_krb5_socket); + switch (smb_krb5->hi->proto) { + case KRB5_KRBHST_UDP: + if (flags & TEVENT_FD_READ) { + smb_krb5_socket_recv(smb_krb5); + return; + } + if (flags & TEVENT_FD_WRITE) { + smb_krb5_socket_send(smb_krb5); + return; + } + /* not reached */ + return; + case KRB5_KRBHST_TCP: + if (flags & TEVENT_FD_READ) { + packet_recv(smb_krb5->packet); + return; + } + if (flags & TEVENT_FD_WRITE) { + packet_queue_run(smb_krb5->packet); + return; + } + /* not reached */ + return; + case KRB5_KRBHST_HTTP: + /* can't happen */ + break; + } +} + +static krb5_error_code smb_krb5_send_and_recv_func_int(struct smb_krb5_context *smb_krb5_context, + struct tevent_context *ev, + krb5_krbhst_info *hi, + struct addrinfo *ai, + smb_krb5_send_to_kdc_func func, + void *data, + time_t timeout, + const krb5_data *send_buf, + krb5_data *recv_buf) +{ + krb5_error_code ret; + NTSTATUS status; + const char *name; + struct addrinfo *a; + struct smb_krb5_socket *smb_krb5; + + DATA_BLOB send_blob; + + TALLOC_CTX *frame = talloc_stackframe(); + if (frame == NULL) { + return ENOMEM; + } + + send_blob = data_blob_const(send_buf->data, send_buf->length); + + for (a = ai; a; a = a->ai_next) { + struct socket_address *remote_addr; + smb_krb5 = talloc(frame, struct smb_krb5_socket); + if (!smb_krb5) { + TALLOC_FREE(frame); + return ENOMEM; + } + smb_krb5->hi = hi; + + switch (a->ai_family) { + case PF_INET: + name = "ipv4"; + break; +#ifdef HAVE_IPV6 + case PF_INET6: + name = "ipv6"; + break; +#endif + default: + TALLOC_FREE(frame); + return EINVAL; + } + + status = NT_STATUS_INVALID_PARAMETER; + switch (hi->proto) { + case KRB5_KRBHST_UDP: + status = socket_create(smb_krb5, name, + SOCKET_TYPE_DGRAM, + &smb_krb5->sock, 0); + break; + case KRB5_KRBHST_TCP: + status = socket_create(smb_krb5, name, + SOCKET_TYPE_STREAM, + &smb_krb5->sock, 0); + break; + case KRB5_KRBHST_HTTP: + TALLOC_FREE(frame); + return EINVAL; + } + if (!NT_STATUS_IS_OK(status)) { + talloc_free(smb_krb5); + continue; + } + + remote_addr = socket_address_from_sockaddr(smb_krb5, a->ai_addr, a->ai_addrlen); + if (!remote_addr) { + talloc_free(smb_krb5); + continue; + } + + status = socket_connect_ev(smb_krb5->sock, NULL, remote_addr, 0, ev); + if (!NT_STATUS_IS_OK(status)) { + talloc_free(smb_krb5); + continue; + } + + /* Setup the FDE, start listening for read events + * from the start (otherwise we may miss a socket + * drop) and mark as AUTOCLOSE along with the fde */ + + /* This is equivalent to EVENT_FD_READABLE(smb_krb5->fde) */ + smb_krb5->fde = tevent_add_fd(ev, smb_krb5->sock, + socket_get_fd(smb_krb5->sock), + TEVENT_FD_READ, + smb_krb5_socket_handler, smb_krb5); + /* its now the job of the event layer to close the socket */ + tevent_fd_set_close_fn(smb_krb5->fde, socket_tevent_fd_close_fn); + socket_set_flags(smb_krb5->sock, SOCKET_FLAG_NOCLOSE); + + tevent_add_timer(ev, smb_krb5, + timeval_current_ofs(timeout, 0), + smb_krb5_request_timeout, smb_krb5); + + smb_krb5->status = NT_STATUS_OK; + smb_krb5->reply = data_blob(NULL, 0); + + switch (hi->proto) { + case KRB5_KRBHST_UDP: + TEVENT_FD_WRITEABLE(smb_krb5->fde); + smb_krb5->request = send_blob; + break; + case KRB5_KRBHST_TCP: + + smb_krb5->packet = packet_init(smb_krb5); + if (smb_krb5->packet == NULL) { + talloc_free(smb_krb5); + return ENOMEM; + } + packet_set_private(smb_krb5->packet, smb_krb5); + packet_set_socket(smb_krb5->packet, smb_krb5->sock); + packet_set_callback(smb_krb5->packet, smb_krb5_full_packet); + packet_set_full_request(smb_krb5->packet, packet_full_request_u32); + packet_set_error_handler(smb_krb5->packet, smb_krb5_error_handler); + packet_set_event_context(smb_krb5->packet, ev); + packet_set_fde(smb_krb5->packet, smb_krb5->fde); + + smb_krb5->request = data_blob_talloc(smb_krb5, NULL, send_blob.length + 4); + RSIVAL(smb_krb5->request.data, 0, send_blob.length); + memcpy(smb_krb5->request.data+4, send_blob.data, send_blob.length); + packet_send(smb_krb5->packet, smb_krb5->request); + break; + case KRB5_KRBHST_HTTP: + TALLOC_FREE(frame); + return EINVAL; + } + while ((NT_STATUS_IS_OK(smb_krb5->status)) && !smb_krb5->reply.length) { + if (tevent_loop_once(ev) != 0) { + TALLOC_FREE(frame); + return EINVAL; + } + + if (func) { + /* After each and every event loop, reset the + * send_to_kdc pointers to what they were when + * we entered this loop. That way, if a + * nested event has invalidated them, we put + * it back before we return to the heimdal + * code */ + ret = smb_krb5_set_send_to_kdc_func(smb_krb5_context, + NULL, /* send_to_realm */ + func, + data); + if (ret != 0) { + TALLOC_FREE(frame); + return ret; + } + } + } + if (NT_STATUS_EQUAL(smb_krb5->status, NT_STATUS_IO_TIMEOUT)) { + talloc_free(smb_krb5); + continue; + } + + if (!NT_STATUS_IS_OK(smb_krb5->status)) { + struct tsocket_address *addr = socket_address_to_tsocket_address(smb_krb5, remote_addr); + const char *addr_string = NULL; + if (addr) { + addr_string = tsocket_address_inet_addr_string(addr, smb_krb5); + } else { + addr_string = NULL; + } + DEBUG(2,("Error reading smb_krb5 reply packet: %s from %s\n", nt_errstr(smb_krb5->status), + addr_string)); + talloc_free(smb_krb5); + continue; + } + + ret = krb5_data_copy(recv_buf, smb_krb5->reply.data, smb_krb5->reply.length); + if (ret) { + TALLOC_FREE(frame); + return ret; + } + talloc_free(smb_krb5); + + break; + } + TALLOC_FREE(frame); + if (a) { + return 0; + } + return KRB5_KDC_UNREACH; +} + +krb5_error_code smb_krb5_send_and_recv_func(struct smb_krb5_context *smb_krb5_context, + void *data, + krb5_krbhst_info *hi, + time_t timeout, + const krb5_data *send_buf, + krb5_data *recv_buf) +{ + krb5_error_code ret; + struct addrinfo *ai; + + struct tevent_context *ev; + TALLOC_CTX *frame = talloc_stackframe(); + if (frame == NULL) { + return ENOMEM; + } + + if (data == NULL) { + /* If no event context was available, then create one for this loop */ + ev = samba_tevent_context_init(frame); + if (ev == NULL) { + TALLOC_FREE(frame); + return ENOMEM; + } + } else { + ev = talloc_get_type_abort(data, struct tevent_context); + } + + ret = krb5_krbhst_get_addrinfo(smb_krb5_context->krb5_context, hi, &ai); + if (ret) { + TALLOC_FREE(frame); + return ret; + } + + ret = smb_krb5_send_and_recv_func_int(smb_krb5_context, + ev, hi, ai, + smb_krb5_send_and_recv_func, + data, timeout, send_buf, recv_buf); + TALLOC_FREE(frame); + return ret; +} + +krb5_error_code smb_krb5_send_and_recv_func_forced_tcp(struct smb_krb5_context *smb_krb5_context, + struct addrinfo *ai, + time_t timeout, + const krb5_data *send_buf, + krb5_data *recv_buf) +{ + krb5_error_code k5ret; + krb5_krbhst_info hi = { + .proto = KRB5_KRBHST_TCP, + }; + struct tevent_context *ev; + TALLOC_CTX *frame = talloc_stackframe(); + if (frame == NULL) { + return ENOMEM; + } + + /* no event context is passed in, create one for this loop */ + ev = samba_tevent_context_init(frame); + if (ev == NULL) { + TALLOC_FREE(frame); + return ENOMEM; + } + + /* No need to pass in send_and_recv functions, we won't nest on this private event loop */ + k5ret = smb_krb5_send_and_recv_func_int(smb_krb5_context, ev, &hi, ai, NULL, NULL, + timeout, send_buf, recv_buf); + TALLOC_FREE(frame); + return k5ret; +} + +static struct db_context *smb_krb5_plugin_db; + +struct smb_krb5_send_to_kdc_state { + intptr_t key_ptr; + struct smb_krb5_context *smb_krb5_context; + smb_krb5_send_to_realm_func send_to_realm; + smb_krb5_send_to_kdc_func send_to_kdc; + void *private_data; +}; + +static int smb_krb5_send_to_kdc_state_destructor(struct smb_krb5_send_to_kdc_state *state) +{ + TDB_DATA key = make_tdb_data((uint8_t *)&state->key_ptr, sizeof(state->key_ptr)); + struct db_record *rec = NULL; + NTSTATUS status; + + rec = dbwrap_fetch_locked(smb_krb5_plugin_db, state, key); + if (rec == NULL) { + return 0; + } + + status = dbwrap_record_delete(rec); + TALLOC_FREE(rec); + if (!NT_STATUS_IS_OK(status)) { + return -1; + } + + state->smb_krb5_context = NULL; + return 0; +} + +krb5_error_code smb_krb5_set_send_to_kdc_func(struct smb_krb5_context *smb_krb5_context, + smb_krb5_send_to_realm_func send_to_realm, + smb_krb5_send_to_kdc_func send_to_kdc, + void *private_data) +{ + intptr_t key_ptr = (intptr_t)smb_krb5_context->krb5_context; + TDB_DATA key = make_tdb_data((uint8_t *)&key_ptr, sizeof(key_ptr)); + intptr_t value_ptr = (intptr_t)NULL; + TDB_DATA value = make_tdb_data(NULL, 0); + struct db_record *rec = NULL; + struct smb_krb5_send_to_kdc_state *state = NULL; + NTSTATUS status; + + rec = dbwrap_fetch_locked(smb_krb5_plugin_db, smb_krb5_context, key); + if (rec == NULL) { + return ENOMEM; + } + + value = dbwrap_record_get_value(rec); + if (value.dsize != 0) { + SMB_ASSERT(value.dsize == sizeof(value_ptr)); + memcpy(&value_ptr, value.dptr, sizeof(value_ptr)); + state = talloc_get_type_abort((const void *)value_ptr, + struct smb_krb5_send_to_kdc_state); + if (send_to_realm == NULL && send_to_kdc == NULL) { + status = dbwrap_record_delete(rec); + TALLOC_FREE(rec); + if (!NT_STATUS_IS_OK(status)) { + return EINVAL; + } + return 0; + } + state->send_to_realm = send_to_realm; + state->send_to_kdc = send_to_kdc; + state->private_data = private_data; + TALLOC_FREE(rec); + return 0; + } + + if (send_to_kdc == NULL && send_to_realm == NULL) { + TALLOC_FREE(rec); + return 0; + } + + state = talloc_zero(smb_krb5_context, + struct smb_krb5_send_to_kdc_state); + if (state == NULL) { + TALLOC_FREE(rec); + return ENOMEM; + } + state->key_ptr = key_ptr; + state->smb_krb5_context = smb_krb5_context; + state->send_to_realm = send_to_realm; + state->send_to_kdc = send_to_kdc; + state->private_data = private_data; + + value_ptr = (intptr_t)state; + value = make_tdb_data((uint8_t *)&value_ptr, sizeof(value_ptr)); + + status = dbwrap_record_store(rec, value, TDB_INSERT); + TALLOC_FREE(rec); + if (!NT_STATUS_IS_OK(status)) { + return EINVAL; + } + talloc_set_destructor(state, smb_krb5_send_to_kdc_state_destructor); + + return 0; +} + +static krb5_error_code smb_krb5_plugin_init(krb5_context context, void **pctx) +{ + *pctx = NULL; + return 0; +} + +static void smb_krb5_plugin_fini(void *ctx) +{ +} + +static void smb_krb5_send_to_kdc_state_parser(TDB_DATA key, TDB_DATA value, + void *private_data) +{ + struct smb_krb5_send_to_kdc_state **state = + (struct smb_krb5_send_to_kdc_state **)private_data; + intptr_t value_ptr; + + SMB_ASSERT(value.dsize == sizeof(value_ptr)); + memcpy(&value_ptr, value.dptr, sizeof(value_ptr)); + *state = talloc_get_type_abort((const void *)value_ptr, + struct smb_krb5_send_to_kdc_state); +} + +static struct smb_krb5_send_to_kdc_state * +smb_krb5_send_to_kdc_get_state(krb5_context context) +{ + intptr_t key_ptr = (intptr_t)context; + TDB_DATA key = make_tdb_data((uint8_t *)&key_ptr, sizeof(key_ptr)); + struct smb_krb5_send_to_kdc_state *state = NULL; + NTSTATUS status; + + status = dbwrap_parse_record(smb_krb5_plugin_db, key, + smb_krb5_send_to_kdc_state_parser, + &state); + if (!NT_STATUS_IS_OK(status)) { + return NULL; + } + + return state; +} + +static krb5_error_code smb_krb5_plugin_send_to_kdc(krb5_context context, + void *ctx, + krb5_krbhst_info *ho, + time_t timeout, + const krb5_data *in, + krb5_data *out) +{ + struct smb_krb5_send_to_kdc_state *state = NULL; + + state = smb_krb5_send_to_kdc_get_state(context); + if (state == NULL) { + return KRB5_PLUGIN_NO_HANDLE; + } + + if (state->send_to_kdc == NULL) { + return KRB5_PLUGIN_NO_HANDLE; + } + + return state->send_to_kdc(state->smb_krb5_context, + state->private_data, + ho, timeout, in, out); +} + +static krb5_error_code smb_krb5_plugin_send_to_realm(krb5_context context, + void *ctx, + krb5_const_realm realm, + time_t timeout, + const krb5_data *in, + krb5_data *out) +{ + struct smb_krb5_send_to_kdc_state *state = NULL; + + state = smb_krb5_send_to_kdc_get_state(context); + if (state == NULL) { + return KRB5_PLUGIN_NO_HANDLE; + } + + if (state->send_to_realm == NULL) { + return KRB5_PLUGIN_NO_HANDLE; + } + + return state->send_to_realm(state->smb_krb5_context, + state->private_data, + realm, timeout, in, out); +} + +static krb5plugin_send_to_kdc_ftable smb_krb5_plugin_ftable = { + KRB5_PLUGIN_SEND_TO_KDC_VERSION_2, + smb_krb5_plugin_init, + smb_krb5_plugin_fini, + smb_krb5_plugin_send_to_kdc, + smb_krb5_plugin_send_to_realm +}; +#endif + +krb5_error_code +smb_krb5_init_context_basic(TALLOC_CTX *tmp_ctx, + struct loadparm_context *lp_ctx, + krb5_context *_krb5_context) +{ + krb5_error_code ret; +#ifdef SAMBA4_USES_HEIMDAL + char **config_files; + const char *config_file, *realm; +#endif + krb5_context krb5_ctx; + + ret = smb_krb5_init_context_common(&krb5_ctx); + if (ret) { + return ret; + } + + /* The MIT Kerberos build relies on using the system krb5.conf file. + * If you really want to use another file please set KRB5_CONFIG + * accordingly. */ +#ifdef SAMBA4_USES_HEIMDAL + config_file = lpcfg_config_path(tmp_ctx, lp_ctx, "krb5.conf"); + if (!config_file) { + krb5_free_context(krb5_ctx); + return ENOMEM; + } + + /* Use our local krb5.conf file by default */ + ret = krb5_prepend_config_files_default(config_file, &config_files); + if (ret) { + DEBUG(1,("krb5_prepend_config_files_default failed (%s)\n", + smb_get_krb5_error_message(krb5_ctx, ret, tmp_ctx))); + krb5_free_context(krb5_ctx); + return ret; + } + + ret = krb5_set_config_files(krb5_ctx, config_files); + krb5_free_config_files(config_files); + if (ret) { + DEBUG(1,("krb5_set_config_files failed (%s)\n", + smb_get_krb5_error_message(krb5_ctx, ret, tmp_ctx))); + krb5_free_context(krb5_ctx); + return ret; + } + + /* + * This is already called in smb_krb5_init_context_common(), + * but krb5_set_config_files() may resets it. + */ + krb5_set_dns_canonicalize_hostname(krb5_ctx, false); + + realm = lpcfg_realm(lp_ctx); + if (realm != NULL) { + ret = krb5_set_default_realm(krb5_ctx, realm); + if (ret) { + DEBUG(1,("krb5_set_default_realm failed (%s)\n", + smb_get_krb5_error_message(krb5_ctx, ret, tmp_ctx))); + krb5_free_context(krb5_ctx); + return ret; + } + } + + if (smb_krb5_plugin_db == NULL) { + /* + * while krb5_plugin_register() takes a krb5_context, + * plugins are registered into a global list, so + * we only do that once + * + * We maintain a separate dispatch table for per + * krb5_context state. + */ + ret = krb5_plugin_register(krb5_ctx, PLUGIN_TYPE_DATA, + KRB5_PLUGIN_SEND_TO_KDC, + &smb_krb5_plugin_ftable); + if (ret) { + DEBUG(1,("krb5_plugin_register(KRB5_PLUGIN_SEND_TO_KDC) failed (%s)\n", + smb_get_krb5_error_message(krb5_ctx, ret, tmp_ctx))); + krb5_free_context(krb5_ctx); + return ret; + } + smb_krb5_plugin_db = db_open_rbt(NULL); + if (smb_krb5_plugin_db == NULL) { + DEBUG(1,("db_open_rbt() failed\n")); + krb5_free_context(krb5_ctx); + return ENOMEM; + } + } +#endif + *_krb5_context = krb5_ctx; + return 0; +} + +krb5_error_code smb_krb5_init_context(void *parent_ctx, + struct loadparm_context *lp_ctx, + struct smb_krb5_context **smb_krb5_context) +{ + krb5_error_code ret; + TALLOC_CTX *tmp_ctx; + krb5_context kctx; +#ifdef SAMBA4_USES_HEIMDAL + krb5_log_facility *logf; +#endif + + tmp_ctx = talloc_new(parent_ctx); + *smb_krb5_context = talloc_zero(tmp_ctx, struct smb_krb5_context); + + if (!*smb_krb5_context || !tmp_ctx) { + talloc_free(tmp_ctx); + return ENOMEM; + } + + ret = smb_krb5_init_context_basic(tmp_ctx, lp_ctx, &kctx); + if (ret) { + DEBUG(1,("smb_krb5_context_init_basic failed (%s)\n", + error_message(ret))); + talloc_free(tmp_ctx); + return ret; + } + (*smb_krb5_context)->krb5_context = kctx; + + talloc_set_destructor(*smb_krb5_context, smb_krb5_context_destroy); + +#ifdef SAMBA4_USES_HEIMDAL + /* TODO: Should we have a different name here? */ + ret = krb5_initlog(kctx, "Samba", &logf); + + if (ret) { + DEBUG(1,("krb5_initlog failed (%s)\n", + smb_get_krb5_error_message(kctx, ret, tmp_ctx))); + talloc_free(tmp_ctx); + return ret; + } + (*smb_krb5_context)->pvt_log_data = logf; + + ret = krb5_addlog_func(kctx, logf, 0 /* min */, -1 /* max */, + smb_krb5_debug_wrapper, + smb_krb5_debug_close, NULL); + if (ret) { + DEBUG(1,("krb5_addlog_func failed (%s)\n", + smb_get_krb5_error_message(kctx, ret, tmp_ctx))); + talloc_free(tmp_ctx); + return ret; + } + krb5_set_warn_dest(kctx, logf); +#endif + talloc_steal(parent_ctx, *smb_krb5_context); + talloc_free(tmp_ctx); + + return 0; +} + +#ifdef SAMBA4_USES_HEIMDAL +krb5_error_code smb_krb5_context_set_event_ctx(struct smb_krb5_context *smb_krb5_context, + struct tevent_context *ev, + struct tevent_context **previous_ev) +{ + int ret; + if (!ev) { + return EINVAL; + } + + *previous_ev = smb_krb5_context->current_ev; + + smb_krb5_context->current_ev = talloc_reference(smb_krb5_context, ev); + if (!smb_krb5_context->current_ev) { + return ENOMEM; + } + + /* Set use of our socket lib */ + ret = smb_krb5_set_send_to_kdc_func(smb_krb5_context, + NULL, /* send_to_realm */ + smb_krb5_send_and_recv_func, + ev); + if (ret) { + TALLOC_CTX *tmp_ctx = talloc_new(NULL); + DEBUG(1,("smb_krb5_set_send_recv_func failed (%s)\n", + smb_get_krb5_error_message(smb_krb5_context->krb5_context, ret, tmp_ctx))); + talloc_free(tmp_ctx); + talloc_unlink(smb_krb5_context, smb_krb5_context->current_ev); + smb_krb5_context->current_ev = NULL; + return ret; + } + return 0; +} + +krb5_error_code smb_krb5_context_remove_event_ctx(struct smb_krb5_context *smb_krb5_context, + struct tevent_context *previous_ev, + struct tevent_context *ev) +{ + int ret; + talloc_unlink(smb_krb5_context, ev); + /* If there was a mismatch with things happening on a stack, then don't wipe things */ + smb_krb5_context->current_ev = previous_ev; + /* Set use of our socket lib */ + ret = smb_krb5_set_send_to_kdc_func(smb_krb5_context, + NULL, /* send_to_realm */ + smb_krb5_send_and_recv_func, + previous_ev); + if (ret) { + TALLOC_CTX *tmp_ctx = talloc_new(NULL); + DEBUG(1,("smb_krb5_set_send_recv_func failed (%s)\n", + smb_get_krb5_error_message(smb_krb5_context->krb5_context, ret, tmp_ctx))); + talloc_free(tmp_ctx); + return ret; + } + return 0; +} +#endif |