--- /dev/null
+/* #ident "@(#)g_initialize.c 1.2 96/02/06 SMI" */
+
+/*
+ * Copyright 1996 by Sun Microsystems, Inc.
+ *
+ * Permission to use, copy, modify, distribute, and sell this software
+ * and its documentation for any purpose is hereby granted without fee,
+ * provided that the above copyright notice appears in all copies and
+ * that both that copyright notice and this permission notice appear in
+ * supporting documentation, and that the name of Sun Microsystems not be used
+ * in advertising or publicity pertaining to distribution of the software
+ * without specific, written prior permission. Sun Microsystems makes no
+ * representations about the suitability of this software for any
+ * purpose. It is provided "as is" without express or implied warranty.
+ *
+ * SUN MICROSYSTEMS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL SUN MICROSYSTEMS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
+ * USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+ * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/*
+ * This function will initialize the gssapi mechglue library
+ */
+
+#include "config.h"
+#include "mglueP.h"
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+
+#include <stdio.h>
+#include <string.h>
+#include <ctype.h>
+#include <errno.h>
+
+#ifdef USE_SOLARIS_SHARED_LIBRARIES
+#include <dlfcn.h>
+
+#define MECH_CONF "/etc/mech.conf"
+#define MECH_SYM "gss_mech_initialize"
+
+static void solaris_initialize (void);
+#endif /* USE_SOLARIS_SHARED_LIBRARIES */
+
+#ifdef __linux__
+#define USE_LINUX_SHARED_LIBRARIES
+#endif
+
+#ifdef USE_LINUX_SHARED_LIBRARIES
+#include <dlfcn.h>
+#define MECH_CONF "/etc/gssapi_mech.conf"
+#define MECH_SYM "gss_mech_initialize"
+static void linux_initialize (void);
+#endif /* USE_LINUX_SHARED_LIBRARIES */
+
+#define g_OID_equal(o1,o2) \
+ (((o1)->length == (o2)->length) && \
+ (memcmp((o1)->elements,(o2)->elements,(int) (o1)->length) == 0))
+
+extern gss_mechanism krb5_gss_initialize();
+
+static int _gss_initialized = 0;
+
+static struct gss_config null_mech = {
+ {0,NULL}};
+
+gss_mechanism *__gss_mechs_array = NULL;
+
+/*
+ * This function will add a new mechanism to the mechs_array
+ */
+
+static OM_uint32
+add_mechanism (mech, replace)
+ gss_mechanism mech;
+ int replace;
+{
+ gss_mechanism * temp_array;
+ gss_OID_set mech_names;
+ OM_uint32 minor_status, major_status;
+ unsigned int i;
+
+ if (mech == NULL)
+ return GSS_S_COMPLETE;
+
+ /* initialize the mechs_array if it hasn't already been initialized */
+ if (__gss_mechs_array == NULL) {
+ __gss_mechs_array = (gss_mechanism *) malloc (sizeof(gss_mechanism));
+
+ if (__gss_mechs_array == NULL)
+ return ENOMEM;
+
+ __gss_mechs_array[0] = &null_mech;
+ }
+
+ /*
+ * Find the length of __gss_mechs_array, and look for an existing
+ * entry for this OID
+ */
+ for (i=0; __gss_mechs_array[i]->mech_type.length != 0; i++) {
+ if (!g_OID_equal(&__gss_mechs_array[i]->mech_type,
+ &mech->mech_type))
+ continue;
+
+ /* We found a match. Replace it? */
+ if (!replace)
+ return GSS_S_FAILURE;
+
+ __gss_mechs_array[i] = mech;
+ return GSS_S_COMPLETE;
+ }
+
+ /* we didn't find it -- add it to the end of the __gss_mechs_array */
+ temp_array = (gss_mechanism *) realloc(__gss_mechs_array,
+ (i+2)*sizeof(gss_mechanism));
+
+ if (temp_array == NULL)
+ return ENOMEM;
+
+ temp_array[i++] = mech;
+ temp_array[i] = &null_mech;
+
+ __gss_mechs_array = temp_array;
+
+ /*
+ * OK, now let's register all of the name types this mechanism
+ * knows how to deal with.
+ */
+ major_status = gss_inquire_names_for_mech(&minor_status, &mech->mech_type,
+ &mech_names);
+ if (major_status != GSS_S_COMPLETE)
+ return (GSS_S_COMPLETE);
+ for (i=0; i < mech_names->count; i++) {
+ gss_add_mech_name_type(&minor_status, &mech_names->elements[i],
+ &mech->mech_type);
+ }
+ (void) gss_release_oid_set(&minor_status, &mech_names);
+
+ return GSS_S_COMPLETE;
+}
+
+void gss_initialize ()
+{
+ /* Make sure we've not run already */
+ if (_gss_initialized)
+ return;
+ _gss_initialized = 1;
+
+#ifdef USE_SOLARIS_SHARED_LIBRARIES
+ solaris_initialize();
+
+#elif defined(USE_LINUX_SHARED_LIBRARIES)
+ linux_initialize();
+
+#else
+ {
+ gss_mechanism mech;
+
+ /*
+ * Use hard-coded in mechanisms... I need to know what mechanisms
+ * are supported... As more mechanisms become supported, they
+ * should be added here, unless shared libraries are used.
+ */
+
+ /* Initialize the krb5 mechanism */
+ mech = (gss_mechanism)krb5_gss_initialize();
+ if (mech)
+ add_mechanism (mech, 1);
+ }
+
+#endif /* USE_SOLARIS_SHARED_LIBRARIES */
+
+#if !defined(macintosh)
+ if (__gss_mechs_array == NULL) { /* this is very bad! */
+ fprintf(stderr,"gss_initialize fatal error: no mechanisms loaded!\n");
+ exit(-1);
+ }
+#else
+ /*
+ * Nothing for now, since this should never happen using static
+ * mechanism loading.
+ */
+#endif
+
+ return;
+}
+
+#ifdef USE_SOLARIS_SHARED_LIBRARIES
+/*
+ * read the configuration file to find out what mechanisms to
+ * load, load them, and then load the mechanism defitions in
+ * and add the mechanisms
+ */
+static void solaris_initialize ()
+{
+ char buffer[BUFSIZ], *filename, *symname, *endp;
+ FILE *conffile;
+ void *dl;
+ gss_mechanism (*sym)(void), mech;
+
+ if ((filename = getenv("GSSAPI_MECH_CONF")) == NULL)
+ filename = MECH_CONF;
+
+ if ((conffile = fopen(filename, "r")) == NULL) {
+ fprintf(stderr,"fatal error: unable to open %s:"
+ " errno %d (%s)\n", filename, errno, strerror(errno));
+ return;
+ }
+
+ while (fgets (buffer, BUFSIZ, conffile) != NULL) {
+ /* ignore lines beginning with # */
+ if (*buffer == '#')
+ continue;
+
+ /* find the first white-space character after the filename */
+ for (symname = buffer; *symname && !isspace(*symname); symname++);
+
+ /* Now find the first non-white-space character */
+ if (*symname) {
+ *symname = '\0';
+ symname++;
+ while (*symname && isspace(*symname))
+ symname++;
+ }
+
+ if (! *symname)
+ symname = MECH_SYM;
+ else {
+ /* Find the end of the symname and make sure it is NULL-terminated */
+ for (endp = symname; *endp && !isspace(*endp); endp++);
+ if (*endp)
+ *endp = '\0';
+ }
+
+ if ((dl = dlopen(buffer, RTLD_NOW)) == NULL) {
+ /* for debugging only */
+ fprintf(stderr,"can't open %s: %s\n",buffer, dlerror());
+ continue;
+ }
+
+ if ((sym = (gss_mechanism (*)(void))dlsym(dl, symname)) == NULL) {
+ dlclose(dl);
+ continue;
+ }
+
+ /* Call the symbol to get the mechanism table */
+ mech = sym();
+
+ /* And add the mechanism (or close the shared library) */
+ if (mech)
+ add_mechanism (mech, 1);
+ else
+ dlclose(dl);
+
+ } /* while */
+
+ return;
+}
+#endif /* USE_SOLARIS_SHARED_LIBRARIES */
+
+#ifdef USE_LINUX_SHARED_LIBRARIES
+extern gss_mechanism internal_krb5_gss_initialize(void *dl);
+
+/*
+ * read the configuration file to find out what mechanisms to
+ * load, load them, and then load the mechanism defitions in
+ * and add the mechanisms
+ */
+static void linux_initialize ()
+{
+ char buffer[BUFSIZ], *filename, *symname, *endp, *err_string;
+ FILE *conffile;
+ void *dl;
+ gss_mechanism (*sym)(void), mech;
+
+ if ((filename = getenv("GSSAPI_MECH_CONF")) == NULL)
+ filename = MECH_CONF;
+
+ if ((conffile = fopen(filename, "r")) == NULL) {
+ fprintf(stderr,"fatal error: unable to open %s:"
+ " errno %d (%s)\n", filename, errno, strerror(errno));
+ return;
+ }
+
+ while (fgets (buffer, BUFSIZ, conffile) != NULL) {
+ /* ignore lines beginning with # */
+ if (*buffer == '#')
+ continue;
+
+ /* find the first white-space character after the filename */
+ for (symname = buffer; *symname && !isspace(*symname); symname++);
+
+ /* Now find the first non-white-space character */
+ if (*symname) {
+ *symname = '\0';
+ symname++;
+ while (*symname && isspace(*symname))
+ symname++;
+ }
+
+ if (! *symname)
+ symname = MECH_SYM;
+ else {
+ /* Find the end of the symname and make sure it is
+ * NULL-terminated */
+ for (endp = symname; *endp && !isspace(*endp); endp++);
+ if (*endp)
+ *endp = '\0';
+ }
+
+ if ((dl = dlopen(buffer, RTLD_NOW)) == NULL) {
+ /* for debugging only */
+ fprintf(stderr,"can't open %s: %s\n",buffer, dlerror());
+ continue;
+ }
+
+#if defined(HAVE_KRB5) && defined(HAVE_HEIMDAL)
+#error Should not have both HAVE_KRB5 and HAVE_HEIMDAL defined!!
+#endif
+
+#ifdef HAVE_KRB5
+ /* Special case for dealing with MIT krb5 mechanism */
+ if (strcmp(symname, "mechglue_internal_krb5_init") == 0) {
+#ifdef DEBUG
+ fprintf(stderr, "Using special MIT initialization\n");
+#endif
+ mech = internal_krb5_gss_initialize(dl);
+ }
+ else
+#endif
+
+#ifdef HAVE_HEIMDAL
+ /* Special case for dealing with heimdal krb5 mechanism */
+ if (strcmp(symname, "mechglue_internal_heimdal_init") == 0) {
+#ifdef DEBUG
+ fprintf(stderr, "Using special Heimdal initialization\n");
+#endif
+ mech = internal_heimdal_gss_initialize(dl);
+ }
+ else
+#endif
+ {
+ if ((sym = (gss_mechanism (*)(void))dlsym(dl, symname)) == NULL) {
+ if ((err_string = dlerror()) != NULL) {
+ fprintf(stderr, "%s: searching for symbol '%s' in '%s'\n",
+ err_string, symname, buffer);
+ dlclose(dl);
+ }
+ continue;
+ }
+
+ /* Call the symbol to get the mechanism table */
+ mech = sym();
+ }
+
+ /* And add the mechanism (or close the shared library) */
+ if (mech) {
+#ifdef DEBUG
+ fprintf(stderr, "Adding mechanism for library '%s'\n", buffer);
+#endif
+ add_mechanism (mech, 1);
+ }
+ else {
+#ifdef DEBUG
+ fprintf(stderr,
+ "Failed to initialize mechanism for library '%s'\n",
+ buffer);
+#endif
+ dlclose(dl);
+ }
+
+ } /* while */
+
+ return;
+}
+#endif /* USE_LINUX_SHARED_LIBRARIES */
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