wmi-1.3.16 from opsview.com
This commit is contained in:
Are Casilla
@@ -0,0 +1,455 @@
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/*
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Unix SMB/CIFS implementation.
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Wrapper for krb5_init_context
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Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
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Copyright (C) Andrew Tridgell 2005
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Copyright (C) Stefan Metzmacher 2004
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "includes.h"
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#include "system/kerberos.h"
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#include "heimdal/lib/krb5/krb5_locl.h"
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#include "auth/kerberos/kerberos.h"
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#include "lib/socket/socket.h"
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#include "system/network.h"
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#include "lib/events/events.h"
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#include "roken.h"
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/*
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context structure for operations on cldap packets
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*/
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struct smb_krb5_socket {
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struct socket_context *sock;
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/* the fd event */
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struct fd_event *fde;
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BOOL timeout;
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NTSTATUS status;
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DATA_BLOB request, reply, partial;
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size_t partial_read;
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krb5_krbhst_info *hi;
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};
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static int smb_krb5_context_destroy_1(struct smb_krb5_context *ctx)
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{
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krb5_free_context(ctx->krb5_context);
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return 0;
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}
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static int smb_krb5_context_destroy_2(struct smb_krb5_context *ctx)
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{
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/* Otherwise krb5_free_context will try and close what we have already free()ed */
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krb5_set_warn_dest(ctx->krb5_context, NULL);
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krb5_closelog(ctx->krb5_context, ctx->logf);
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smb_krb5_context_destroy_1(ctx);
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return 0;
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}
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/* We never close down the DEBUG system, and no need to unreference the use */
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static void smb_krb5_debug_close(void *private) {
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return;
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}
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static void smb_krb5_debug_wrapper(const char *timestr, const char *msg, void *private)
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{
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DEBUG(2, ("Kerberos: %s\n", msg));
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}
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/*
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handle recv events on a smb_krb5 socket
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*/
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static void smb_krb5_socket_recv(struct smb_krb5_socket *smb_krb5)
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{
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TALLOC_CTX *tmp_ctx = talloc_new(smb_krb5);
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DATA_BLOB blob;
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size_t nread, dsize;
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switch (smb_krb5->hi->proto) {
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case KRB5_KRBHST_UDP:
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smb_krb5->status = socket_pending(smb_krb5->sock, &dsize);
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if (!NT_STATUS_IS_OK(smb_krb5->status)) {
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talloc_free(tmp_ctx);
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return;
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}
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blob = data_blob_talloc(tmp_ctx, NULL, dsize);
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if (blob.data == NULL && dsize != 0) {
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smb_krb5->status = NT_STATUS_NO_MEMORY;
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talloc_free(tmp_ctx);
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return;
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}
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smb_krb5->status = socket_recv(smb_krb5->sock, blob.data, blob.length, &nread);
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if (!NT_STATUS_IS_OK(smb_krb5->status)) {
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talloc_free(tmp_ctx);
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return;
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}
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blob.length = nread;
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if (nread == 0) {
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smb_krb5->status = NT_STATUS_UNEXPECTED_NETWORK_ERROR;
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talloc_free(tmp_ctx);
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return;
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}
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DEBUG(2,("Received smb_krb5 packet of length %d\n",
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(int)blob.length));
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talloc_steal(smb_krb5, blob.data);
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smb_krb5->reply = blob;
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talloc_free(tmp_ctx);
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break;
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case KRB5_KRBHST_TCP:
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if (smb_krb5->partial.length == 0) {
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smb_krb5->partial = data_blob_talloc(smb_krb5, NULL, 4);
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if (!smb_krb5->partial.data) {
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smb_krb5->status = NT_STATUS_NO_MEMORY;
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return;
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}
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smb_krb5->partial_read = 0;
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}
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/* read in the packet length */
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if (smb_krb5->partial_read < 4) {
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uint32_t packet_length;
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smb_krb5->status = socket_recv(smb_krb5->sock,
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smb_krb5->partial.data + smb_krb5->partial_read,
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4 - smb_krb5->partial_read,
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&nread);
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/* todo: this should be converted to the packet_*() routines */
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if (!NT_STATUS_IS_OK(smb_krb5->status)) {
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return;
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}
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smb_krb5->partial_read += nread;
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if (smb_krb5->partial_read != 4) {
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return;
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}
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packet_length = RIVAL(smb_krb5->partial.data, 0);
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smb_krb5->partial.data = talloc_realloc(smb_krb5, smb_krb5->partial.data,
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uint8_t, packet_length + 4);
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if (!smb_krb5->partial.data) {
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smb_krb5->status = NT_STATUS_NO_MEMORY;
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return;
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}
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smb_krb5->partial.length = packet_length + 4;
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}
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/* read in the body */
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smb_krb5->status = socket_recv(smb_krb5->sock,
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smb_krb5->partial.data + smb_krb5->partial_read,
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smb_krb5->partial.length - smb_krb5->partial_read,
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&nread);
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if (!NT_STATUS_IS_OK(smb_krb5->status)) return;
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smb_krb5->partial_read += nread;
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if (smb_krb5->partial_read != smb_krb5->partial.length) return;
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smb_krb5->reply = data_blob_talloc(smb_krb5, smb_krb5->partial.data + 4, smb_krb5->partial.length - 4);
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break;
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case KRB5_KRBHST_HTTP:
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return;
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}
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}
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/*
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handle request timeouts
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*/
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static void smb_krb5_request_timeout(struct event_context *event_ctx,
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struct timed_event *te, struct timeval t,
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void *private)
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{
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struct smb_krb5_socket *smb_krb5 = talloc_get_type(private, struct smb_krb5_socket);
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DEBUG(5,("Timed out smb_krb5 packet\n"));
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smb_krb5->timeout = True;
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}
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/*
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handle send events on a smb_krb5 socket
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*/
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static void smb_krb5_socket_send(struct smb_krb5_socket *smb_krb5)
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{
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NTSTATUS status;
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size_t len;
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len = smb_krb5->request.length;
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status = socket_send(smb_krb5->sock, &smb_krb5->request, &len);
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if (!NT_STATUS_IS_OK(status)) return;
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EVENT_FD_READABLE(smb_krb5->fde);
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EVENT_FD_NOT_WRITEABLE(smb_krb5->fde);
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return;
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}
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/*
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handle fd events on a smb_krb5_socket
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*/
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static void smb_krb5_socket_handler(struct event_context *ev, struct fd_event *fde,
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uint16_t flags, void *private)
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{
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struct smb_krb5_socket *smb_krb5 = talloc_get_type(private, struct smb_krb5_socket);
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if (flags & EVENT_FD_WRITE) {
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smb_krb5_socket_send(smb_krb5);
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}
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if (flags & EVENT_FD_READ) {
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smb_krb5_socket_recv(smb_krb5);
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}
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}
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krb5_error_code smb_krb5_send_and_recv_func(krb5_context context,
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void *data,
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krb5_krbhst_info *hi,
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const krb5_data *send_buf,
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krb5_data *recv_buf)
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{
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krb5_error_code ret;
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NTSTATUS status;
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struct socket_address *remote_addr;
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const char *name;
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struct addrinfo *ai, *a;
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struct smb_krb5_socket *smb_krb5;
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struct event_context *ev = talloc_get_type(data, struct event_context);
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DATA_BLOB send_blob = data_blob_const(send_buf->data, send_buf->length);
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ret = krb5_krbhst_get_addrinfo(context, hi, &ai);
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if (ret) {
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return ret;
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}
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for (a = ai; a; a = ai->ai_next) {
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smb_krb5 = talloc(NULL, struct smb_krb5_socket);
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if (!smb_krb5) {
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return ENOMEM;
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}
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smb_krb5->hi = hi;
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switch (a->ai_family) {
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case PF_INET:
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name = "ipv4";
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break;
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#ifdef HAVE_SOCKET_IPV6
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case PF_INET6:
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name = "ipv6";
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break;
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#endif
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default:
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talloc_free(smb_krb5);
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return EINVAL;
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}
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status = NT_STATUS_INVALID_PARAMETER;
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switch (hi->proto) {
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case KRB5_KRBHST_UDP:
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if (lp_parm_bool(-1, "krb5", "udp", True)) {
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status = socket_create(name, SOCKET_TYPE_DGRAM, &smb_krb5->sock, 0);
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}
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break;
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case KRB5_KRBHST_TCP:
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if (lp_parm_bool(-1, "krb5", "tcp", True)) {
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status = socket_create(name, SOCKET_TYPE_STREAM, &smb_krb5->sock, 0);
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}
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break;
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case KRB5_KRBHST_HTTP:
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talloc_free(smb_krb5);
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return EINVAL;
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}
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if (!NT_STATUS_IS_OK(status)) {
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talloc_free(smb_krb5);
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continue;
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}
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talloc_steal(smb_krb5, smb_krb5->sock);
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remote_addr = socket_address_from_sockaddr(smb_krb5, a->ai_addr, a->ai_addrlen);
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if (!remote_addr) {
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talloc_free(smb_krb5);
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continue;
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}
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status = socket_connect_ev(smb_krb5->sock, NULL, remote_addr, 0, ev);
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if (!NT_STATUS_IS_OK(status)) {
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talloc_free(smb_krb5);
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continue;
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}
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talloc_free(remote_addr);
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smb_krb5->fde = event_add_fd(ev, smb_krb5,
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socket_get_fd(smb_krb5->sock), 0,
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smb_krb5_socket_handler, smb_krb5);
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event_add_timed(ev, smb_krb5,
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timeval_current_ofs(context->kdc_timeout, 0),
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smb_krb5_request_timeout, smb_krb5);
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EVENT_FD_WRITEABLE(smb_krb5->fde);
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switch (hi->proto) {
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case KRB5_KRBHST_UDP:
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smb_krb5->request = send_blob;
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break;
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case KRB5_KRBHST_TCP:
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smb_krb5->request = data_blob_talloc(smb_krb5, NULL, send_blob.length + 4);
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RSIVAL(smb_krb5->request.data, 0, send_blob.length);
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memcpy(smb_krb5->request.data+4, send_blob.data, send_blob.length);
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break;
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case KRB5_KRBHST_HTTP:
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talloc_free(smb_krb5);
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return EINVAL;
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}
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smb_krb5->timeout = False;
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smb_krb5->status = NT_STATUS_OK;
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smb_krb5->reply = data_blob(NULL, 0);
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smb_krb5->partial = data_blob(NULL, 0);
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while (!smb_krb5->timeout && (NT_STATUS_IS_OK(smb_krb5->status)) && !smb_krb5->reply.length) {
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if (event_loop_once(ev) != 0) {
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talloc_free(smb_krb5);
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return EINVAL;
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}
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}
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if (!NT_STATUS_IS_OK(smb_krb5->status)) {
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DEBUG(2,("Error reading smb_krb5 reply packet: %s\n", nt_errstr(smb_krb5->status)));
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talloc_free(smb_krb5);
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continue;
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}
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if (smb_krb5->timeout) {
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talloc_free(smb_krb5);
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continue;
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}
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ret = krb5_data_copy(recv_buf, smb_krb5->reply.data, smb_krb5->reply.length);
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if (ret) {
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talloc_free(smb_krb5);
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return ret;
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}
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talloc_free(smb_krb5);
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break;
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}
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if (a) {
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return 0;
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}
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return KRB5_KDC_UNREACH;
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}
|
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|
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krb5_error_code smb_krb5_init_context(void *parent_ctx,
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struct smb_krb5_context **smb_krb5_context)
|
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{
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krb5_error_code ret;
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TALLOC_CTX *tmp_ctx;
|
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struct event_context *ev;
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initialize_krb5_error_table();
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tmp_ctx = talloc_new(parent_ctx);
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*smb_krb5_context = talloc(tmp_ctx, struct smb_krb5_context);
|
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|
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if (!*smb_krb5_context || !tmp_ctx) {
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talloc_free(*smb_krb5_context);
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talloc_free(tmp_ctx);
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return ENOMEM;
|
||||
}
|
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ret = krb5_init_context(&(*smb_krb5_context)->krb5_context);
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if (ret) {
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DEBUG(1,("krb5_init_context failed (%s)\n",
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error_message(ret)));
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return ret;
|
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}
|
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|
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talloc_set_destructor(*smb_krb5_context, smb_krb5_context_destroy_1);
|
||||
|
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if (lp_realm() && *lp_realm()) {
|
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char *upper_realm = strupper_talloc(tmp_ctx, lp_realm());
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if (!upper_realm) {
|
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DEBUG(1,("gensec_krb5_start: could not uppercase realm: %s\n", lp_realm()));
|
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talloc_free(tmp_ctx);
|
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return ENOMEM;
|
||||
}
|
||||
ret = krb5_set_default_realm((*smb_krb5_context)->krb5_context, upper_realm);
|
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if (ret) {
|
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DEBUG(1,("krb5_set_default_realm failed (%s)\n",
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smb_get_krb5_error_message((*smb_krb5_context)->krb5_context, ret, tmp_ctx)));
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||||
talloc_free(tmp_ctx);
|
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return ret;
|
||||
}
|
||||
}
|
||||
|
||||
/* TODO: Should we have a different name here? */
|
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ret = krb5_initlog((*smb_krb5_context)->krb5_context, "Samba", &(*smb_krb5_context)->logf);
|
||||
|
||||
if (ret) {
|
||||
DEBUG(1,("krb5_initlog failed (%s)\n",
|
||||
smb_get_krb5_error_message((*smb_krb5_context)->krb5_context, ret, tmp_ctx)));
|
||||
talloc_free(tmp_ctx);
|
||||
return ret;
|
||||
}
|
||||
|
||||
talloc_set_destructor(*smb_krb5_context, smb_krb5_context_destroy_2);
|
||||
|
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ret = krb5_addlog_func((*smb_krb5_context)->krb5_context, (*smb_krb5_context)->logf, 0 /* min */, -1 /* max */,
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smb_krb5_debug_wrapper, smb_krb5_debug_close, NULL);
|
||||
if (ret) {
|
||||
DEBUG(1,("krb5_addlog_func failed (%s)\n",
|
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smb_get_krb5_error_message((*smb_krb5_context)->krb5_context, ret, tmp_ctx)));
|
||||
talloc_free(tmp_ctx);
|
||||
return ret;
|
||||
}
|
||||
krb5_set_warn_dest((*smb_krb5_context)->krb5_context, (*smb_krb5_context)->logf);
|
||||
|
||||
ev = event_context_find(*smb_krb5_context);
|
||||
/* Set use of our socket lib */
|
||||
ret = krb5_set_send_to_kdc_func((*smb_krb5_context)->krb5_context,
|
||||
smb_krb5_send_and_recv_func,
|
||||
ev);
|
||||
if (ret) {
|
||||
DEBUG(1,("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;
|
||||
}
|
||||
|
||||
(*smb_krb5_context)->krb5_context->mem_ctx = *smb_krb5_context;
|
||||
|
||||
talloc_steal(parent_ctx, *smb_krb5_context);
|
||||
talloc_free(tmp_ctx);
|
||||
|
||||
/* Set options in kerberos */
|
||||
|
||||
krb5_set_dns_canonicalize_hostname((*smb_krb5_context)->krb5_context, FALSE);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user