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-rw-r--r--source4/auth/kerberos/krb5_init_context.c353
-rw-r--r--source4/heimdal/lib/krb5/context.c1
-rw-r--r--source4/heimdal/lib/krb5/krb5-protos.h5
-rw-r--r--source4/heimdal/lib/krb5/krb5.h8
-rw-r--r--source4/heimdal/lib/krb5/send_to_kdc.c55
5 files changed, 412 insertions, 10 deletions
diff --git a/source4/auth/kerberos/krb5_init_context.c b/source4/auth/kerberos/krb5_init_context.c
index 62260702d5..673dbe62f7 100644
--- a/source4/auth/kerberos/krb5_init_context.c
+++ b/source4/auth/kerberos/krb5_init_context.c
@@ -3,7 +3,9 @@
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 2 of the License, or
@@ -22,6 +24,28 @@
#include "includes.h"
#include "system/kerberos.h"
#include "auth/kerberos/kerberos.h"
+#include "system/network.h"
+#include "system/select.h"
+#include "system/filesys.h"
+#include "lib/socket/socket.h"
+#include "lib/events/events.h"
+/*
+ context structure for operations on cldap packets
+*/
+struct smb_krb5_socket {
+ struct socket_context *sock;
+
+ /* the fd event */
+ struct fd_event *fde;
+
+ BOOL timeout;
+ NTSTATUS status;
+ DATA_BLOB request, reply, partial;
+
+ size_t partial_read;
+
+ krb5_krbhst_info *hi;
+};
static int smb_krb5_context_destroy_1(void *ptr)
{
@@ -51,11 +75,324 @@ static void smb_krb5_debug_wrapper(const char *timestr, const char *msg, void *p
DEBUG(3, ("Kerberos: %s\n", msg));
}
+/*
+ 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);
+ NTSTATUS status;
+ DATA_BLOB blob;
+ size_t nread, dsize;
+
+ switch (smb_krb5->hi->proto) {
+ case KRB5_KRBHST_UDP:
+ status = socket_pending(smb_krb5->sock, &dsize);
+ if (!NT_STATUS_IS_OK(status)) {
+ talloc_free(tmp_ctx);
+ return;
+ }
+
+ blob = data_blob_talloc(tmp_ctx, NULL, dsize);
+ if (blob.data == NULL) {
+ talloc_free(tmp_ctx);
+ return;
+ }
+
+ status = socket_recv(smb_krb5->sock, blob.data, blob.length, &nread, 0);
+ if (!NT_STATUS_IS_OK(status)) {
+ talloc_free(tmp_ctx);
+ return;
+ }
+ blob.length = nread;
+
+ DEBUG(2,("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);
+ break;
+ case KRB5_KRBHST_TCP:
+ if (smb_krb5->partial.length == 0) {
+ smb_krb5->partial = data_blob_talloc(smb_krb5, NULL, 4);
+ if (!smb_krb5->partial.data) {
+ smb_krb5->status = NT_STATUS_NO_MEMORY;
+ return;
+ }
+
+ smb_krb5->partial_read = 0;
+ }
+
+ /* read in the packet length */
+ if (smb_krb5->partial_read < 4) {
+ uint32_t packet_length;
+
+ status = socket_recv(smb_krb5->sock,
+ smb_krb5->partial.data + smb_krb5->partial_read,
+ 4 - smb_krb5->partial_read,
+ &nread, 0);
+ if (NT_STATUS_IS_ERR(status)) {
+ smb_krb5->status = status;
+ return;
+ }
+ if (!NT_STATUS_IS_OK(status)) {
+ return;
+ }
+
+ smb_krb5->partial_read += nread;
+ if (smb_krb5->partial_read != 4) {
+ return;
+ }
+
+ packet_length = RIVAL(smb_krb5->partial.data, 0);
+
+ smb_krb5->partial.data = talloc_realloc(smb_krb5, smb_krb5->partial.data,
+ uint8_t, packet_length + 4);
+ if (!smb_krb5->partial.data) {
+ smb_krb5->status = NT_STATUS_NO_MEMORY;
+ return;
+ }
+
+ smb_krb5->partial.length = packet_length + 4;
+ }
+
+ /* read in the body */
+ status = socket_recv(smb_krb5->sock,
+ smb_krb5->partial.data + smb_krb5->partial_read,
+ smb_krb5->partial.length - smb_krb5->partial_read,
+ &nread, 0);
+ if (NT_STATUS_IS_ERR(status)) {
+ smb_krb5->status = status;
+ return;
+ }
+ if (!NT_STATUS_IS_OK(status)) return;
+
+ smb_krb5->partial_read += nread;
+
+ if (smb_krb5->partial_read != smb_krb5->partial.length) return;
+
+ smb_krb5->reply = data_blob_talloc(smb_krb5, smb_krb5->partial.data + 4, smb_krb5->partial.length - 4);
+ break;
+ case KRB5_KRBHST_HTTP:
+ return;
+ }
+}
+
+/*
+ handle request timeouts
+*/
+static void smb_krb5_request_timeout(struct event_context *event_ctx,
+ struct timed_event *te, struct timeval t,
+ void *private)
+{
+ struct smb_krb5_socket *smb_krb5 = talloc_get_type(private, struct smb_krb5_socket);
+ DEBUG(2,("Timed out smb_krb5 packet\n"));
+ smb_krb5->timeout = True;
+}
+
+/*
+ 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, 0);
+
+ if (!NT_STATUS_IS_OK(status)) return;
+
+ EVENT_FD_READABLE(smb_krb5->fde);
+
+ EVENT_FD_NOT_WRITEABLE(smb_krb5->fde);
+ return;
+}
+
+
+/*
+ handle fd events on a smb_krb5_socket
+*/
+static void smb_krb5_socket_handler(struct event_context *ev, struct fd_event *fde,
+ uint16_t flags, void *private)
+{
+ struct smb_krb5_socket *smb_krb5 = talloc_get_type(private, struct smb_krb5_socket);
+ if (flags & EVENT_FD_WRITE) {
+ smb_krb5_socket_send(smb_krb5);
+ }
+ if (flags & EVENT_FD_READ) {
+ smb_krb5_socket_recv(smb_krb5);
+ }
+}
+
+
+static krb5_error_code smb_krb5_send_and_recv_func(krb5_context context,
+ void *data,
+ krb5_krbhst_info *hi,
+ const krb5_data *send_buf,
+ krb5_data *recv_buf)
+{
+ krb5_error_code ret;
+ NTSTATUS status;
+ char *remote_addr;
+ const char *name;
+ struct addrinfo *ai, *a;
+ struct smb_krb5_socket *smb_krb5;
+ int port;
+
+ struct event_context *ev = talloc_get_type(data, struct event_context);
+
+ DATA_BLOB send_blob = data_blob_const(send_buf->data, send_buf->length);
+
+ ret = krb5_krbhst_get_addrinfo(context, hi, &ai);
+ if (ret) {
+ return ret;
+ }
+
+ for (a = ai; a; a = ai->ai_next) {
+ smb_krb5 = talloc(NULL, struct smb_krb5_socket);
+ if (!smb_krb5) {
+ return ENOMEM;
+ }
+ smb_krb5->hi = hi;
+
+ switch (a->ai_family) {
+ case PF_INET:
+ name = "ipv4";
+ break;
+ case PF_INET6:
+ name = "ipv6";
+ break;
+ default:
+ talloc_free(smb_krb5);
+ return EINVAL;
+ }
+
+ status = NT_STATUS_INVALID_PARAMETER;
+ switch (hi->proto) {
+ case KRB5_KRBHST_UDP:
+ status = socket_create(name, SOCKET_TYPE_DGRAM, &smb_krb5->sock, 0);
+ break;
+ case KRB5_KRBHST_TCP:
+ status = socket_create(name, SOCKET_TYPE_STREAM, &smb_krb5->sock, 0);
+ break;
+ case KRB5_KRBHST_HTTP:
+ talloc_free(smb_krb5);
+ return EINVAL;
+ }
+ if (!NT_STATUS_IS_OK(status)) {
+ talloc_free(smb_krb5);
+ continue;
+ }
+
+ talloc_steal(smb_krb5, smb_krb5->sock);
+
+ switch (a->ai_family) {
+ case PF_INET:
+ remote_addr = talloc_strdup(smb_krb5, inet_ntoa(((struct sockaddr_in *)a->ai_addr)->sin_addr));
+ port = ntohs(((struct sockaddr_in *)a->ai_addr)->sin_port);
+ break;
+ case PF_INET6:
+ {
+ char addr[128];
+ const char *ret_addr;
+ ret_addr = inet_ntop(AF_INET6, &((struct sockaddr_in6 *)a->ai_addr)->sin6_addr, addr, sizeof(addr));
+ if (ret_addr == NULL) {
+ talloc_free(smb_krb5);
+ return EINVAL;
+ }
+
+ remote_addr = talloc_strdup(smb_krb5, ret_addr);
+ port = ntohs(((struct sockaddr_in6 *)a->ai_addr)->sin6_port);
+ break;
+ }
+ default:
+ talloc_free(smb_krb5);
+ return EINVAL;
+ }
+
+ status = socket_connect_ev(smb_krb5->sock, NULL, 0, remote_addr, port, 0, ev);
+ if (!NT_STATUS_IS_OK(status)) {
+ talloc_free(smb_krb5);
+ continue;
+ }
+ talloc_free(remote_addr);
+
+ smb_krb5->fde = event_add_fd(ev, smb_krb5,
+ socket_get_fd(smb_krb5->sock), 0,
+ smb_krb5_socket_handler, smb_krb5);
+
+ event_add_timed(ev, smb_krb5,
+ timeval_current_ofs(context->kdc_timeout, 0),
+ smb_krb5_request_timeout, smb_krb5);
+
+ EVENT_FD_WRITEABLE(smb_krb5->fde);
+
+ switch (hi->proto) {
+ case KRB5_KRBHST_UDP:
+ smb_krb5->request = send_blob;
+ break;
+ case KRB5_KRBHST_TCP:
+ 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);
+ break;
+ case KRB5_KRBHST_HTTP:
+ talloc_free(smb_krb5);
+ return EINVAL;
+ }
+ smb_krb5->timeout = False;
+ smb_krb5->status = NT_STATUS_OK;
+ smb_krb5->reply = data_blob(NULL, 0);
+ smb_krb5->partial = data_blob(NULL, 0);
+
+ while (!smb_krb5->timeout && (NT_STATUS_IS_OK(smb_krb5->status)) && !smb_krb5->reply.length) {
+ if (event_loop_once(ev) != 0) {
+ talloc_free(smb_krb5);
+ return EINVAL;
+ }
+ }
+ if (!NT_STATUS_IS_OK(smb_krb5->status)) {
+ DEBUG(2,("Error reading smb_krb5 reply packet: %s\n", nt_errstr(smb_krb5->status)));
+ talloc_free(smb_krb5);
+ continue;
+ }
+
+ if (smb_krb5->timeout) {
+ talloc_free(smb_krb5);
+ continue;
+ }
+
+ ret = krb5_data_copy(recv_buf, smb_krb5->reply.data, smb_krb5->reply.length);
+ if (ret) {
+ talloc_free(smb_krb5);
+ return ret;
+ }
+ talloc_free(smb_krb5);
+
+ break;
+ }
+ if (a) {
+ return 0;
+ }
+ return KRB5_KDC_UNREACH;
+}
+
+/* NO internal data, so nothing to free */
+static void smb_krb5_send_and_recv_close_func(krb5_context context, void *data)
+{
+ return;
+}
+
+
krb5_error_code smb_krb5_init_context(void *parent_ctx,
struct smb_krb5_context **smb_krb5_context)
{
krb5_error_code ret;
TALLOC_CTX *tmp_ctx;
+ struct event_context *ev;
initialize_krb5_error_table();
@@ -115,13 +452,25 @@ static void smb_krb5_debug_wrapper(const char *timestr, const char *msg, void *p
}
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_recv_func((*smb_krb5_context)->krb5_context,
+ smb_krb5_send_and_recv_func,
+ smb_krb5_send_and_recv_close_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;
+ }
+
talloc_steal(parent_ctx, *smb_krb5_context);
talloc_free(tmp_ctx);
/* Set options in kerberos */
(*smb_krb5_context)->krb5_context->fdns = FALSE;
-
+
return 0;
}
diff --git a/source4/heimdal/lib/krb5/context.c b/source4/heimdal/lib/krb5/context.c
index 3140f1b08f..594665235b 100644
--- a/source4/heimdal/lib/krb5/context.c
+++ b/source4/heimdal/lib/krb5/context.c
@@ -263,6 +263,7 @@ krb5_free_context(krb5_context context)
krb5_closelog(context, context->warn_dest);
krb5_set_extra_addresses(context, NULL);
krb5_set_ignore_addresses(context, NULL);
+ free(context->send_and_recv);
if (context->mutex != NULL) {
HEIMDAL_MUTEX_destroy(context->mutex);
free(context->mutex);
diff --git a/source4/heimdal/lib/krb5/krb5-protos.h b/source4/heimdal/lib/krb5/krb5-protos.h
index 8db553e6e3..681ac4189b 100644
--- a/source4/heimdal/lib/krb5/krb5-protos.h
+++ b/source4/heimdal/lib/krb5/krb5-protos.h
@@ -3432,6 +3432,11 @@ krb5_write_safe_message (
krb5_error_code KRB5_LIB_FUNCTION
krb5_xfree (void */*ptr*/);
+krb5_error_code KRB5_LIB_FUNCTION
+krb5_set_send_recv_func(krb5_context context,
+ krb5_send_and_recv_func_t func,
+ krb5_send_and_recv_close_func_t close_fn,
+ void *data);
#ifdef __cplusplus
}
diff --git a/source4/heimdal/lib/krb5/krb5.h b/source4/heimdal/lib/krb5/krb5.h
index 90b239cf0d..800683ef0c 100644
--- a/source4/heimdal/lib/krb5/krb5.h
+++ b/source4/heimdal/lib/krb5/krb5.h
@@ -444,6 +444,7 @@ typedef struct krb5_context_data {
void *mutex; /* protects error_string/error_buf */
int large_msg_size;
krb5_boolean fdns; /* Lookup hostnames to find full name, or send as-is */
+ struct send_and_recv *send_and_recv; /* Alternate functions for KDC communication */
} krb5_context_data;
enum {
@@ -744,6 +745,13 @@ enum {
KRB5_KRBHST_FLAGS_LARGE_MSG = 2
};
+typedef int (*krb5_send_and_recv_func_t)(krb5_context,
+ void *,
+ krb5_krbhst_info *,
+ const krb5_data *,
+ krb5_data *);
+typedef void (*krb5_send_and_recv_close_func_t)(krb5_context, void*);
+
struct credentials; /* this is to keep the compiler happy */
struct getargs;
struct sockaddr;
diff --git a/source4/heimdal/lib/krb5/send_to_kdc.c b/source4/heimdal/lib/krb5/send_to_kdc.c
index d55f8dc692..7bb4adabbd 100644
--- a/source4/heimdal/lib/krb5/send_to_kdc.c
+++ b/source4/heimdal/lib/krb5/send_to_kdc.c
@@ -35,6 +35,30 @@
RCSID("$Id: send_to_kdc.c,v 1.56 2005/06/17 04:33:11 lha Exp $");
+struct send_and_recv {
+ krb5_send_and_recv_func_t func;
+ krb5_send_and_recv_close_func_t close;
+ void *data;
+};
+
+krb5_error_code KRB5_LIB_FUNCTION
+krb5_set_send_recv_func(krb5_context context,
+ krb5_send_and_recv_func_t func,
+ krb5_send_and_recv_close_func_t close_fn,
+ void *data)
+{
+ free(context->send_and_recv);
+ context->send_and_recv = malloc(sizeof(*context->send_and_recv));
+ if (!context->send_and_recv) {
+ return ENOMEM;
+ }
+ context->send_and_recv->func = func;
+ context->send_and_recv->close = close_fn;
+ context->send_and_recv->data = data;
+ return 0;
+}
+
+
/*
* send the data in `req' on the socket `fd' (which is datagram iff udp)
* waiting `tmout' for a reply and returning the reply in `rep'.
@@ -329,11 +353,27 @@ krb5_sendto (krb5_context context,
while (krb5_krbhst_next(context, handle, &hi) == 0) {
struct addrinfo *ai, *a;
+ if (context->send_and_recv) {
+ ret = context->send_and_recv->func(context,
+ context->send_and_recv->data,
+ hi, send_data, receive);
+ if (ret) {
+ continue;
+ } else if (receive->length != 0) {
+ return 0;
+ } else {
+ continue;
+ }
+ }
+
if(hi->proto == KRB5_KRBHST_HTTP && context->http_proxy) {
- if (send_via_proxy (context, hi, send_data, receive))
+ if (send_via_proxy (context, hi, send_data, receive)) {
+ /* Try again, with next host */
continue;
- else
- goto out;
+ } else {
+ /* Success */
+ return 0;
+ }
}
ret = krb5_krbhst_get_addrinfo(context, hi, &ai);
@@ -363,16 +403,15 @@ krb5_sendto (krb5_context context,
break;
}
close (fd);
- if(ret == 0 && receive->length != 0)
- goto out;
+ if(ret == 0 && receive->length != 0) {
+ return 0;
+ }
}
}
krb5_krbhst_reset(context, handle);
}
krb5_clear_error_string (context);
- ret = KRB5_KDC_UNREACH;
-out:
- return ret;
+ return KRB5_KDC_UNREACH;
}
krb5_error_code KRB5_LIB_FUNCTION
generated by cgit (git 2.34.1) at 2024-12-17 05:42:03 +0000