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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-15 16:28:20 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-15 16:28:20 +0000
commitdcc721a95bef6f0d8e6d8775b8efe33e5aecd562 (patch)
tree66a2774cd0ee294d019efd71d2544c70f42b2842 /plugins/imgssapi
parentInitial commit. (diff)
downloadrsyslog-dcc721a95bef6f0d8e6d8775b8efe33e5aecd562.tar.xz
rsyslog-dcc721a95bef6f0d8e6d8775b8efe33e5aecd562.zip
Adding upstream version 8.2402.0.upstream/8.2402.0
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r--plugins/imgssapi/Makefile.am6
-rw-r--r--plugins/imgssapi/Makefile.in797
-rw-r--r--plugins/imgssapi/imgssapi.c823
3 files changed, 1626 insertions, 0 deletions
diff --git a/plugins/imgssapi/Makefile.am b/plugins/imgssapi/Makefile.am
new file mode 100644
index 0000000..ea01635
--- /dev/null
+++ b/plugins/imgssapi/Makefile.am
@@ -0,0 +1,6 @@
+pkglib_LTLIBRARIES = imgssapi.la
+
+imgssapi_la_SOURCES = imgssapi.c
+imgssapi_la_CPPFLAGS = -I$(top_srcdir) $(PTHREADS_CFLAGS) $(RSRT_CFLAGS)
+imgssapi_la_LDFLAGS = -module -avoid-version
+imgssapi_la_LIBADD = $(GSS_LIBS)
diff --git a/plugins/imgssapi/Makefile.in b/plugins/imgssapi/Makefile.in
new file mode 100644
index 0000000..4b920e6
--- /dev/null
+++ b/plugins/imgssapi/Makefile.in
@@ -0,0 +1,797 @@
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+
+mostlyclean-libtool:
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+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/plugins/imgssapi/imgssapi.c b/plugins/imgssapi/imgssapi.c
new file mode 100644
index 0000000..65eceb9
--- /dev/null
+++ b/plugins/imgssapi/imgssapi.c
@@ -0,0 +1,823 @@
+/* imgssapi.c
+ * This is the implementation of the GSSAPI input module.
+ *
+ * Note: the root gssapi code was contributed by varmojfekoj and is most often
+ * maintened by him. I am just doing the plumbing around it (I event don't have a
+ * test lab for gssapi yet... ). I am very grateful for this useful code
+ * contribution -- rgerhards, 2008-03-05
+ *
+ * NOTE: read comments in module-template.h to understand how this file
+ * works!
+ *
+ * Copyright 2007, 2017 Rainer Gerhards and Adiscon GmbH.
+ *
+ * This file is part of rsyslog.
+ *
+ * Rsyslog 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.
+ *
+ * Rsyslog 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 Rsyslog. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * A copy of the GPL can be found in the file "COPYING" in this distribution.
+ */
+#include "config.h"
+#include <stdlib.h>
+#include <assert.h>
+#include <string.h>
+#include <errno.h>
+#include <unistd.h>
+#include <stdarg.h>
+#include <ctype.h>
+#include <netinet/in.h>
+#include <netdb.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#if HAVE_FCNTL_H
+#include <fcntl.h>
+#endif
+#include <gssapi/gssapi.h>
+#include "rsyslog.h"
+#include "dirty.h"
+#include "cfsysline.h"
+#include "module-template.h"
+#include "unicode-helper.h"
+#include "net.h"
+#include "srUtils.h"
+#include "gss-misc.h"
+#include "tcpsrv.h"
+#include "tcps_sess.h"
+#include "errmsg.h"
+#include "netstrm.h"
+#include "glbl.h"
+#include "debug.h"
+#include "unlimited_select.h"
+#include "rsconf.h"
+
+MODULE_TYPE_INPUT
+MODULE_TYPE_NOKEEP
+
+/* defines */
+#define ALLOWEDMETHOD_GSS 2
+#define ALLOWEDMETHOD_TCP 1
+
+
+/* some forward definitions - they may go away when we no longer include imtcp.c */
+static rsRetVal addGSSListener(void __attribute__((unused)) *pVal, uchar *pNewVal);
+static rsRetVal actGSSListener(uchar *port);
+static int TCPSessGSSInit(void);
+static void TCPSessGSSClose(tcps_sess_t* pSess);
+static rsRetVal TCPSessGSSRecv(tcps_sess_t *pSess, void *buf, size_t buf_len, ssize_t *);
+static rsRetVal onSessAccept(tcpsrv_t *pThis, tcps_sess_t *ppSess);
+static rsRetVal OnSessAcceptGSS(tcpsrv_t *pThis, tcps_sess_t *ppSess);
+
+/* static data */
+DEF_IMOD_STATIC_DATA
+DEFobjCurrIf(tcpsrv)
+DEFobjCurrIf(tcps_sess)
+DEFobjCurrIf(gssutil)
+DEFobjCurrIf(netstrm)
+DEFobjCurrIf(net)
+DEFobjCurrIf(glbl)
+DEFobjCurrIf(prop)
+
+static tcpsrv_t *pOurTcpsrv = NULL; /* our TCP server(listener) TODO: change for multiple instances */
+static gss_cred_id_t gss_server_creds = GSS_C_NO_CREDENTIAL;
+static uchar *srvPort;
+
+/* our usr structure for the tcpsrv object */
+typedef struct gsssrv_s {
+ char allowedMethods;
+} gsssrv_t;
+
+/* our usr structure for the session object */
+typedef struct gss_sess_s {
+ OM_uint32 gss_flags;
+ gss_ctx_id_t gss_context;
+ char allowedMethods;
+} gss_sess_t;
+
+
+/* config variables */
+struct modConfData_s {
+ EMPTY_STRUCT;
+};
+
+static uchar *pszLstnPortFileName = NULL; /* file for dynamic port */
+static int iTCPSessMax = 200; /* max number of sessions */
+static char *gss_listen_service_name = NULL;
+static int bPermitPlainTcp = 0; /* plain tcp syslog allowed on GSSAPI port? */
+static int bKeepAlive = 0; /* use SO_KEEPALIVE? */
+
+
+/* methods */
+/* callbacks */
+static rsRetVal OnSessConstructFinalize(void *ppUsr)
+{
+ DEFiRet;
+ gss_sess_t **ppGSess = (gss_sess_t**) ppUsr;
+ gss_sess_t *pGSess;
+
+ assert(ppGSess != NULL);
+
+ if((pGSess = calloc(1, sizeof(gss_sess_t))) == NULL)
+ ABORT_FINALIZE(RS_RET_OUT_OF_MEMORY);
+
+ pGSess->gss_flags = 0;
+ pGSess->gss_context = GSS_C_NO_CONTEXT;
+ pGSess->allowedMethods = 0;
+
+ *ppGSess = pGSess;
+
+finalize_it:
+ RETiRet;
+}
+
+
+/* Destruct the user session pointer for a GSSAPI session. Please note
+ * that it *is* valid to receive a NULL user pointer. In this case, the
+ * sessions is to be torn down before it was fully initialized. This
+ * happens in error cases, e.g. when the host ACL did not match.
+ * rgerhards, 2008-03-03
+ */
+static rsRetVal
+OnSessDestruct(void *ppUsr)
+{
+ DEFiRet;
+ gss_sess_t **ppGSess = (gss_sess_t**) ppUsr;
+
+ assert(ppGSess != NULL);
+ if(*ppGSess == NULL)
+ FINALIZE;
+
+ if((*ppGSess)->allowedMethods & ALLOWEDMETHOD_GSS) {
+ OM_uint32 maj_stat, min_stat;
+ maj_stat = gss_delete_sec_context(&min_stat, &(*ppGSess)->gss_context, GSS_C_NO_BUFFER);
+ if (maj_stat != GSS_S_COMPLETE)
+ gssutil.display_status((char*)"deleting context", maj_stat, min_stat);
+ }
+
+ free(*ppGSess);
+ *ppGSess = NULL;
+
+finalize_it:
+ RETiRet;
+}
+
+
+/* Check if the host is permitted to send us messages.
+ * Note: the pUsrSess may be zero if the server is running in tcp-only mode!
+ */
+static int
+isPermittedHost(struct sockaddr *addr, char *fromHostFQDN, void *pUsrSrv, void*pUsrSess)
+{
+ gsssrv_t *pGSrv;
+ gss_sess_t *pGSess;
+ char allowedMethods = 0;
+
+ assert(pUsrSrv != NULL);
+ pGSrv = (gsssrv_t*) pUsrSrv;
+ pGSess = (gss_sess_t*) pUsrSess;
+
+ if((pGSrv->allowedMethods & ALLOWEDMETHOD_TCP) &&
+ net.isAllowedSender2((uchar*)"TCP", addr, (char*)fromHostFQDN, 1))
+ allowedMethods |= ALLOWEDMETHOD_TCP;
+ if((pGSrv->allowedMethods & ALLOWEDMETHOD_GSS) &&
+ net.isAllowedSender2((uchar*)"GSS", addr, (char*)fromHostFQDN, 1))
+ allowedMethods |= ALLOWEDMETHOD_GSS;
+ if(allowedMethods && pGSess != NULL)
+ pGSess->allowedMethods = allowedMethods;
+ return allowedMethods;
+}
+
+
+static rsRetVal
+onSessAccept(tcpsrv_t *pThis, tcps_sess_t *pSess)
+{
+ DEFiRet;
+ gsssrv_t *pGSrv;
+
+ pGSrv = (gsssrv_t*) pThis->pUsr;
+
+ if(pGSrv->allowedMethods & ALLOWEDMETHOD_GSS) {
+ iRet = OnSessAcceptGSS(pThis, pSess);
+ }
+
+ RETiRet;
+}
+
+
+static rsRetVal
+onRegularClose(tcps_sess_t *pSess)
+{
+ DEFiRet;
+ gss_sess_t *pGSess;
+
+ assert(pSess != NULL);
+ assert(pSess->pUsr != NULL);
+ pGSess = (gss_sess_t*) pSess->pUsr;
+
+ if(pGSess->allowedMethods & ALLOWEDMETHOD_GSS)
+ TCPSessGSSClose(pSess);
+ else {
+ /* process any incomplete frames left over */
+ tcps_sess.PrepareClose(pSess);
+ /* Session closed */
+ tcps_sess.Close(pSess);
+ }
+ RETiRet;
+}
+
+
+static rsRetVal
+onErrClose(tcps_sess_t *pSess)
+{
+ DEFiRet;
+ gss_sess_t *pGSess;
+
+ assert(pSess != NULL);
+ assert(pSess->pUsr != NULL);
+ pGSess = (gss_sess_t*) pSess->pUsr;
+
+ if(pGSess->allowedMethods & ALLOWEDMETHOD_GSS)
+ TCPSessGSSClose(pSess);
+ else
+ tcps_sess.Close(pSess);
+
+ RETiRet;
+}
+
+
+/* open the listen sockets */
+static rsRetVal
+doOpenLstnSocks(tcpsrv_t *pSrv)
+{
+ gsssrv_t *pGSrv;
+ DEFiRet;
+
+ ISOBJ_TYPE_assert(pSrv, tcpsrv);
+ pGSrv = pSrv->pUsr;
+ assert(pGSrv != NULL);
+
+ /* first apply some config settings */
+ if(pGSrv->allowedMethods) {
+ if(pGSrv->allowedMethods & ALLOWEDMETHOD_GSS) {
+ if(TCPSessGSSInit()) {
+ LogError(0, NO_ERRCODE, "GSS-API initialization failed\n");
+ pGSrv->allowedMethods &= ~(ALLOWEDMETHOD_GSS);
+ }
+ }
+ if(pGSrv->allowedMethods) {
+ /* fallback to plain TCP */
+ CHKiRet(tcpsrv.create_tcp_socket(pSrv));
+ } else {
+ ABORT_FINALIZE(RS_RET_GSS_ERR);
+ }
+ }
+
+finalize_it:
+ RETiRet;
+}
+
+
+static rsRetVal
+doRcvData(tcps_sess_t *pSess, char *buf, size_t lenBuf, ssize_t *piLenRcvd, int *const oserr)
+{
+ DEFiRet;
+ int allowedMethods;
+ gss_sess_t *pGSess;
+
+ assert(pSess != NULL);
+ assert(pSess->pUsr != NULL);
+ pGSess = (gss_sess_t*) pSess->pUsr;
+ assert(piLenRcvd != NULL);
+
+ allowedMethods = pGSess->allowedMethods;
+ if(allowedMethods & ALLOWEDMETHOD_GSS) {
+ CHKiRet(TCPSessGSSRecv(pSess, buf, lenBuf, piLenRcvd));
+ } else {
+ *piLenRcvd = lenBuf;
+ CHKiRet(netstrm.Rcv(pSess->pStrm, (uchar*) buf, piLenRcvd, oserr));
+ }
+
+finalize_it:
+ RETiRet;
+}
+
+
+/* end callbacks */
+
+static rsRetVal
+addGSSListener(void __attribute__((unused)) *pVal, uchar *pNewVal)
+{
+ DEFiRet;
+
+ if((ustrcmp(pNewVal, UCHAR_CONSTANT("0")) == 0 && pszLstnPortFileName == NULL)
+ || ustrcmp(pNewVal, UCHAR_CONSTANT("0")) < 0) {
+ CHKmalloc(srvPort = (uchar*)strdup("514"));
+ } else {
+ srvPort = pNewVal;
+ }
+
+finalize_it:
+ RETiRet;
+}
+
+static rsRetVal
+actGSSListener(uchar *port)
+{
+ DEFiRet;
+ tcpLstnParams_t *cnf_params = NULL;
+ gsssrv_t *pGSrv = NULL;
+
+ assert(pOurTcpsrv == NULL);
+ CHKmalloc(cnf_params = (tcpLstnParams_t*) calloc(1, sizeof(tcpLstnParams_t)));
+ /* first create/init the gsssrv "object" */
+ if((pGSrv = calloc(1, sizeof(gsssrv_t))) == NULL)
+ ABORT_FINALIZE(RS_RET_OUT_OF_MEMORY);
+
+ pGSrv->allowedMethods = ALLOWEDMETHOD_GSS;
+ if(bPermitPlainTcp)
+ pGSrv->allowedMethods |= ALLOWEDMETHOD_TCP;
+ /* gsssrv initialized */
+
+ CHKiRet(tcpsrv.Construct(&pOurTcpsrv));
+ CHKiRet(tcpsrv.SetUsrP(pOurTcpsrv, pGSrv));
+ CHKiRet(tcpsrv.SetCBOnSessConstructFinalize(pOurTcpsrv, OnSessConstructFinalize));
+ CHKiRet(tcpsrv.SetCBOnSessDestruct(pOurTcpsrv, OnSessDestruct));
+ CHKiRet(tcpsrv.SetCBIsPermittedHost(pOurTcpsrv, isPermittedHost));
+ CHKiRet(tcpsrv.SetCBRcvData(pOurTcpsrv, doRcvData));
+ CHKiRet(tcpsrv.SetCBOpenLstnSocks(pOurTcpsrv, doOpenLstnSocks));
+ CHKiRet(tcpsrv.SetCBOnSessAccept(pOurTcpsrv, onSessAccept));
+ CHKiRet(tcpsrv.SetCBOnRegularClose(pOurTcpsrv, onRegularClose));
+ CHKiRet(tcpsrv.SetCBOnErrClose(pOurTcpsrv, onErrClose));
+ CHKiRet(tcpsrv.SetInputName(pOurTcpsrv, cnf_params, UCHAR_CONSTANT("imgssapi")));
+ CHKiRet(tcpsrv.SetKeepAlive(pOurTcpsrv, bKeepAlive));
+ CHKiRet(tcpsrv.SetOrigin(pOurTcpsrv, UCHAR_CONSTANT("imgssapi")));
+ cnf_params->pszPort = port;
+ cnf_params->bSuppOctetFram = 1;
+ tcpsrv.configureTCPListen(pOurTcpsrv, cnf_params);
+ CHKiRet(tcpsrv.ConstructFinalize(pOurTcpsrv));
+ cnf_params = NULL;
+
+finalize_it:
+ if(iRet != RS_RET_OK) {
+ LogError(0, NO_ERRCODE, "error %d trying to add listener", iRet);
+ if(pOurTcpsrv != NULL)
+ tcpsrv.Destruct(&pOurTcpsrv);
+ free(pGSrv);
+ }
+ free(cnf_params);
+ RETiRet;
+}
+
+
+/* returns 0 if all went OK, -1 if it failed */
+static int TCPSessGSSInit(void)
+{
+ gss_buffer_desc name_buf;
+ gss_name_t server_name;
+ OM_uint32 maj_stat, min_stat;
+
+ if (gss_server_creds != GSS_C_NO_CREDENTIAL)
+ return 0;
+
+ name_buf.value = (gss_listen_service_name == NULL) ? (char*)"host" : gss_listen_service_name;
+ name_buf.length = strlen(name_buf.value) + 1;
+ maj_stat = gss_import_name(&min_stat, &name_buf, GSS_C_NT_HOSTBASED_SERVICE, &server_name);
+ if (maj_stat != GSS_S_COMPLETE) {
+ gssutil.display_status((char*)"importing name", maj_stat, min_stat);
+ return -1;
+ }
+
+ maj_stat = gss_acquire_cred(&min_stat, server_name, 0,
+ GSS_C_NULL_OID_SET, GSS_C_ACCEPT,
+ &gss_server_creds, NULL, NULL);
+ if (maj_stat != GSS_S_COMPLETE) {
+ gssutil.display_status((char*)"acquiring credentials", maj_stat, min_stat);
+ return -1;
+ }
+
+ gss_release_name(&min_stat, &server_name);
+ dbgprintf("GSS-API initialized\n");
+ return 0;
+}
+
+
+/* returns 0 if all went OK, -1 if it failed
+ * tries to guess if the connection uses gssapi.
+ */
+static rsRetVal
+OnSessAcceptGSS(tcpsrv_t *pThis, tcps_sess_t *pSess)
+{
+ DEFiRet;
+ gss_buffer_desc send_tok, recv_tok;
+ gss_name_t client;
+ OM_uint32 maj_stat, min_stat, acc_sec_min_stat;
+ gss_ctx_id_t *context;
+ OM_uint32 *sess_flags;
+ int fdSess;
+ char allowedMethods;
+ gsssrv_t *pGSrv;
+ gss_sess_t *pGSess;
+ uchar *pszPeer = NULL;
+ int lenPeer = 0;
+ char *buf = NULL;
+
+ assert(pSess != NULL);
+
+ pGSrv = (gsssrv_t*) pThis->pUsr;
+ pGSess = (gss_sess_t*) pSess->pUsr;
+ allowedMethods = pGSrv->allowedMethods;
+ if(allowedMethods & ALLOWEDMETHOD_GSS) {
+ int ret = 0;
+ const size_t bufsize = glbl.GetMaxLine(runConf);
+ CHKmalloc(buf = (char*) malloc(bufsize + 1));
+
+ prop.GetString(pSess->fromHostIP, &pszPeer, &lenPeer);
+
+ dbgprintf("GSS-API Trying to accept TCP session %p from %s\n", pSess, (char *)pszPeer);
+
+ CHKiRet(netstrm.GetSock(pSess->pStrm, &fdSess)); // TODO: method access!
+ if (allowedMethods & ALLOWEDMETHOD_TCP) {
+ int len;
+ struct timeval tv;
+#ifdef USE_UNLIMITED_SELECT
+ fd_set *pFds = malloc(glbl.GetFdSetSize());
+#else
+ fd_set fds;
+ fd_set *pFds = &fds;
+#endif
+
+ do {
+ FD_ZERO(pFds);
+ FD_SET(fdSess, pFds);
+ tv.tv_sec = 1;
+ tv.tv_usec = 0;
+ ret = select(fdSess + 1, pFds, NULL, NULL, &tv);
+ } while (ret < 0 && errno == EINTR);
+ if (ret < 0) {
+ LogError(0, RS_RET_ERR, "TCP session %p from %s will be "
+ "closed, error ignored\n", pSess, (char *)pszPeer);
+ ABORT_FINALIZE(RS_RET_ERR); // TODO: define good error codes
+ } else if (ret == 0) {
+ dbgprintf("GSS-API Reverting to plain TCP\n");
+ pGSess->allowedMethods = ALLOWEDMETHOD_TCP;
+ ABORT_FINALIZE(RS_RET_OK); // TODO: define good error codes
+ }
+
+ do {
+ ret = recv(fdSess, buf, bufsize, MSG_PEEK);
+ } while (ret < 0 && errno == EINTR);
+ if (ret <= 0) {
+ if (ret == 0) {
+ dbgprintf("GSS-API Connection closed by peer %s\n", (char *)pszPeer);
+ } else {
+ LogError(0, RS_RET_ERR, "TCP(GSS) session %p from %s will be closed, "
+ "error ignored\n", pSess, (char *)pszPeer);
+ }
+ ABORT_FINALIZE(RS_RET_ERR); // TODO: define good error codes
+ }
+
+ if (ret < 4) {
+ dbgprintf("GSS-API Reverting to plain TCP from %s\n", (char *)pszPeer);
+ pGSess->allowedMethods = ALLOWEDMETHOD_TCP;
+ ABORT_FINALIZE(RS_RET_OK); // TODO: define good error codes
+ } else if (ret == 4) {
+ /* The client might has been interupted after sending
+ * the data length (4B), give him another chance.
+ */
+ srSleep(1, 0);
+ do {
+ ret = recv(fdSess, buf, bufsize, MSG_PEEK);
+ } while (ret < 0 && errno == EINTR);
+ if (ret <= 0) {
+ if (ret == 0) {
+ dbgprintf("GSS-API Connection closed by peer %s\n", (char *)pszPeer);
+ } else {
+ LogError(0, NO_ERRCODE, "TCP session %p from %s will be "
+ "closed, error ignored\n", pSess, (char *)pszPeer);
+ }
+ ABORT_FINALIZE(RS_RET_ERR); // TODO: define good error codes
+ }
+ }
+
+ /* TODO: how does this work together with IPv6? Does it? */
+ len = ntohl((buf[0] << 24)
+ | (buf[1] << 16)
+ | (buf[2] << 8)
+ | buf[3]);
+ if ((ret - 4) < len || len == 0) {
+ dbgprintf("GSS-API Reverting to plain TCP from %s\n", (char *)pszPeer);
+ pGSess->allowedMethods = ALLOWEDMETHOD_TCP;
+ ABORT_FINALIZE(RS_RET_OK); // TODO: define good error codes
+ }
+
+ freeFdSet(pFds);
+ }
+
+ context = &pGSess->gss_context;
+ *context = GSS_C_NO_CONTEXT;
+ sess_flags = &pGSess->gss_flags;
+ do {
+ if (gssutil.recv_token(fdSess, &recv_tok) <= 0) {
+ LogError(0, NO_ERRCODE, "TCP session %p from %s will be "
+ "closed, error ignored\n", pSess, (char *)pszPeer);
+ ABORT_FINALIZE(RS_RET_ERR); // TODO: define good error codes
+ }
+ maj_stat = gss_accept_sec_context(&acc_sec_min_stat, context, gss_server_creds,
+ &recv_tok, GSS_C_NO_CHANNEL_BINDINGS, &client,
+ NULL, &send_tok, sess_flags, NULL, NULL);
+ if (recv_tok.value) {
+ free(recv_tok.value);
+ recv_tok.value = NULL;
+ }
+ if (maj_stat != GSS_S_COMPLETE && maj_stat != GSS_S_CONTINUE_NEEDED) {
+ gss_release_buffer(&min_stat, &send_tok);
+ if (*context != GSS_C_NO_CONTEXT)
+ gss_delete_sec_context(&min_stat, context, GSS_C_NO_BUFFER);
+ if ((allowedMethods & ALLOWEDMETHOD_TCP) &&
+ (GSS_ROUTINE_ERROR(maj_stat) == GSS_S_DEFECTIVE_TOKEN)) {
+ dbgprintf("GSS-API Reverting to plain TCP from %s\n", (char *)pszPeer);
+ dbgprintf("tcp session socket with new data: #%d\n", fdSess);
+ if(tcps_sess.DataRcvd(pSess, buf, ret) != RS_RET_OK) {
+ LogError(0, NO_ERRCODE, "Tearing down TCP "
+ "Session %p from %s - see previous messages "
+ "for reason(s)\n", pSess, (char *)pszPeer);
+ ABORT_FINALIZE(RS_RET_ERR); // TODO: define good error codes
+ }
+ pGSess->allowedMethods = ALLOWEDMETHOD_TCP;
+ ABORT_FINALIZE(RS_RET_OK); // TODO: define good error codes
+ }
+ gssutil.display_status((char*)"accepting context", maj_stat, acc_sec_min_stat);
+ ABORT_FINALIZE(RS_RET_ERR); // TODO: define good error codes
+ }
+ if (send_tok.length != 0) {
+ if(gssutil.send_token(fdSess, &send_tok) < 0) {
+ gss_release_buffer(&min_stat, &send_tok);
+ LogError(0, NO_ERRCODE, "TCP session %p from %s will be "
+ "closed, error ignored\n", pSess, (char *)pszPeer);
+ if (*context != GSS_C_NO_CONTEXT)
+ gss_delete_sec_context(&min_stat, context, GSS_C_NO_BUFFER);
+ ABORT_FINALIZE(RS_RET_ERR); // TODO: define good error codes
+ }
+ gss_release_buffer(&min_stat, &send_tok);
+ }
+ } while (maj_stat == GSS_S_CONTINUE_NEEDED);
+
+ maj_stat = gss_display_name(&min_stat, client, &recv_tok, NULL);
+ if (maj_stat != GSS_S_COMPLETE) {
+ gssutil.display_status((char*)"displaying name", maj_stat, min_stat);
+ } else {
+ dbgprintf("GSS-API Accepted connection from peer %s: %s\n", (char *)pszPeer,
+ (char*) recv_tok.value);
+ }
+ gss_release_name(&min_stat, &client);
+ gss_release_buffer(&min_stat, &recv_tok);
+
+ dbgprintf("GSS-API Provided context flags:\n");
+ gssutil.display_ctx_flags(*sess_flags);
+ pGSess->allowedMethods = ALLOWEDMETHOD_GSS;
+ }
+
+finalize_it:
+ free(buf);
+ RETiRet;
+}
+
+
+/* Replaces recv() for gssapi connections.
+ */
+rsRetVal TCPSessGSSRecv(tcps_sess_t *pSess, void *buf, size_t buf_len, ssize_t *piLenRcvd)
+{
+ DEFiRet;
+ gss_buffer_desc xmit_buf, msg_buf;
+ gss_ctx_id_t *context;
+ OM_uint32 maj_stat, min_stat;
+ int fdSess;
+ int conf_state;
+ gss_sess_t *pGSess;
+
+ assert(pSess->pUsr != NULL);
+ assert(piLenRcvd != NULL);
+ pGSess = (gss_sess_t*) pSess->pUsr;
+
+ netstrm.GetSock(pSess->pStrm, &fdSess); // TODO: method access, CHKiRet!
+ if(gssutil.recv_token(fdSess, &xmit_buf) <= 0)
+ ABORT_FINALIZE(RS_RET_GSS_ERR);
+
+ context = &pGSess->gss_context;
+ maj_stat = gss_unwrap(&min_stat, *context, &xmit_buf, &msg_buf,
+ &conf_state, (gss_qop_t *) NULL);
+ if(maj_stat != GSS_S_COMPLETE) {
+ gssutil.display_status((char*)"unsealing message", maj_stat, min_stat);
+ if(xmit_buf.value) {
+ free(xmit_buf.value);
+ xmit_buf.value = 0;
+ }
+ ABORT_FINALIZE(RS_RET_GSS_ERR);
+ }
+ if (xmit_buf.value) {
+ free(xmit_buf.value);
+ xmit_buf.value = 0;
+ }
+
+ *piLenRcvd = msg_buf.length < buf_len ? msg_buf.length : buf_len;
+ memcpy(buf, msg_buf.value, *piLenRcvd);
+ gss_release_buffer(&min_stat, &msg_buf);
+
+finalize_it:
+ RETiRet;
+}
+
+
+/* Takes care of cleaning up gssapi stuff and then calls
+ * TCPSessClose().
+ */
+void TCPSessGSSClose(tcps_sess_t* pSess)
+{
+ OM_uint32 maj_stat, min_stat;
+ gss_ctx_id_t *context;
+ gss_sess_t *pGSess;
+
+ assert(pSess->pUsr != NULL);
+ pGSess = (gss_sess_t*) pSess->pUsr;
+
+ context = &pGSess->gss_context;
+ maj_stat = gss_delete_sec_context(&min_stat, context, GSS_C_NO_BUFFER);
+ if (maj_stat != GSS_S_COMPLETE)
+ gssutil.display_status((char*)"deleting context", maj_stat, min_stat);
+ *context = GSS_C_NO_CONTEXT;
+ pGSess->gss_flags = 0;
+ pGSess->allowedMethods = 0;
+
+ tcps_sess.Close(pSess);
+}
+
+
+/* Counterpart of TCPSessGSSInit(). This is called to exit the GSS system
+ * at all. It is a server-based session exit.
+ */
+static rsRetVal
+TCPSessGSSDeinit(void)
+{
+ DEFiRet;
+ OM_uint32 maj_stat, min_stat;
+
+ if (gss_server_creds != GSS_C_NO_CREDENTIAL) {
+ maj_stat = gss_release_cred(&min_stat, &gss_server_creds);
+ if (maj_stat != GSS_S_COMPLETE)
+ gssutil.display_status((char*)"releasing credentials", maj_stat, min_stat);
+ }
+ RETiRet;
+}
+
+
+#if 0 /* can be used to integrate into new config system */
+BEGINbeginCnfLoad
+CODESTARTbeginCnfLoad
+ENDbeginCnfLoad
+
+
+BEGINendCnfLoad
+CODESTARTendCnfLoad
+ENDendCnfLoad
+
+
+BEGINcheckCnf
+CODESTARTcheckCnf
+ENDcheckCnf
+
+
+BEGINactivateCnf
+CODESTARTactivateCnf
+ENDactivateCnf
+
+
+BEGINfreeCnf
+CODESTARTfreeCnf
+ENDfreeCnf
+#endif
+
+/* This function is called to gather input.
+ */
+BEGINrunInput
+CODESTARTrunInput
+ /* This will fail if the priviledges are dropped. Should be
+ * moved to the '*activateCnfPrePrivDrop' section eventually.
+ */
+ actGSSListener(srvPort);
+
+ iRet = tcpsrv.Run(pOurTcpsrv);
+ENDrunInput
+
+
+/* initialize and return if will run or not */
+BEGINwillRun
+CODESTARTwillRun
+ if(srvPort == NULL)
+ ABORT_FINALIZE(RS_RET_NO_RUN);
+
+ net.PrintAllowedSenders(2); /* TCP */
+ net.PrintAllowedSenders(3); /* GSS */
+finalize_it:
+ENDwillRun
+
+
+
+BEGINmodExit
+CODESTARTmodExit
+ if(pOurTcpsrv != NULL)
+ iRet = tcpsrv.Destruct(&pOurTcpsrv);
+ TCPSessGSSDeinit();
+
+ /* release objects we used */
+ objRelease(tcps_sess, LM_TCPSRV_FILENAME);
+ objRelease(tcpsrv, LM_TCPSRV_FILENAME);
+ objRelease(gssutil, LM_GSSUTIL_FILENAME);
+ objRelease(glbl, CORE_COMPONENT);
+ objRelease(netstrm, LM_NETSTRM_FILENAME);
+ objRelease(net, LM_NET_FILENAME);
+ objRelease(prop, CORE_COMPONENT);
+ENDmodExit
+
+
+BEGINafterRun
+CODESTARTafterRun
+ /* do cleanup here */
+ net.clearAllowedSenders((uchar*)"TCP");
+ net.clearAllowedSenders((uchar*)"GSS");
+ENDafterRun
+
+
+BEGINisCompatibleWithFeature
+CODESTARTisCompatibleWithFeature
+ if(eFeat == sFEATURENonCancelInputTermination)
+ iRet = RS_RET_OK;
+ENDisCompatibleWithFeature
+
+
+BEGINqueryEtryPt
+CODESTARTqueryEtryPt
+CODEqueryEtryPt_STD_IMOD_QUERIES
+CODEqueryEtryPt_IsCompatibleWithFeature_IF_OMOD_QUERIES
+ENDqueryEtryPt
+
+
+static rsRetVal resetConfigVariables(uchar __attribute__((unused)) *pp, void __attribute__((unused)) *pVal)
+{
+ if (gss_listen_service_name != NULL) {
+ free(gss_listen_service_name);
+ gss_listen_service_name = NULL;
+ }
+ if (pszLstnPortFileName != NULL) {
+ free(pszLstnPortFileName);
+ pszLstnPortFileName = NULL;
+ }
+ bPermitPlainTcp = 0;
+ iTCPSessMax = 200;
+ bKeepAlive = 0;
+ return RS_RET_OK;
+}
+
+
+BEGINmodInit()
+CODESTARTmodInit
+ *ipIFVersProvided = CURR_MOD_IF_VERSION; /* we only support the current definition */
+CODEmodInit_QueryRegCFSLineHdlr
+ pOurTcpsrv = NULL;
+ /* request objects we use */
+ CHKiRet(objUse(tcps_sess, LM_TCPSRV_FILENAME));
+ CHKiRet(objUse(tcpsrv, LM_TCPSRV_FILENAME));
+ CHKiRet(objUse(gssutil, LM_GSSUTIL_FILENAME));
+ CHKiRet(objUse(glbl, CORE_COMPONENT));
+ CHKiRet(objUse(netstrm, LM_NETSTRM_FILENAME));
+ CHKiRet(objUse(net, LM_NET_FILENAME));
+ CHKiRet(objUse(prop, CORE_COMPONENT));
+
+ /* register config file handlers */
+ CHKiRet(omsdRegCFSLineHdlr((uchar *)"inputgssserverpermitplaintcp", 0, eCmdHdlrBinary,
+ NULL, &bPermitPlainTcp, STD_LOADABLE_MODULE_ID));
+ CHKiRet(omsdRegCFSLineHdlr((uchar *)"inputgssserverrun", 0, eCmdHdlrGetWord,
+ addGSSListener, NULL, STD_LOADABLE_MODULE_ID));
+ CHKiRet(omsdRegCFSLineHdlr((uchar *)"inputgssserverservicename", 0, eCmdHdlrGetWord,
+ NULL, &gss_listen_service_name, STD_LOADABLE_MODULE_ID));
+ CHKiRet(omsdRegCFSLineHdlr((uchar *)"inputgsslistenportfilename", 0, eCmdHdlrGetWord,
+ NULL, &pszLstnPortFileName, STD_LOADABLE_MODULE_ID));
+ CHKiRet(omsdRegCFSLineHdlr((uchar *)"inputgssservermaxsessions", 0, eCmdHdlrInt,
+ NULL, &iTCPSessMax, STD_LOADABLE_MODULE_ID));
+ CHKiRet(omsdRegCFSLineHdlr((uchar *)"inputgssserverkeepalive", 0, eCmdHdlrBinary,
+ NULL, &bKeepAlive, STD_LOADABLE_MODULE_ID));
+ CHKiRet(omsdRegCFSLineHdlr((uchar *)"resetconfigvariables", 1, eCmdHdlrCustomHandler,
+ resetConfigVariables, NULL, STD_LOADABLE_MODULE_ID));
+ENDmodInit
+
+/* vim:set ai:
+ */