RPC(3): Import from FreeBSD

freebsd/lib/libc/rpc/getpublickey.c

@@ -0,0 +1,179 @@
+#include <machine/rtems-bsd-user-space.h>
+
+/*-
+ * Copyright (c) 2009, Sun Microsystems, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without 
+ * modification, are permitted provided that the following conditions are met:
+ * - Redistributions of source code must retain the above copyright notice, 
+ *   this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright notice, 
+ *   this list of conditions and the following disclaimer in the documentation 
+ *   and/or other materials provided with the distribution.
+ * - Neither the name of Sun Microsystems, Inc. nor the names of its 
+ *   contributors may be used to endorse or promote products derived 
+ *   from this software without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)publickey.c 1.10 91/03/11 Copyr 1986 Sun Micro";
+#endif
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+/*
+ * publickey.c
+ * Copyright (C) 1986, Sun Microsystems, Inc.
+ */
+
+/*
+ * Public key lookup routines
+ */
+#include "namespace.h"
+#include <stdio.h>
+#include <pwd.h>
+#include <rpc/rpc.h>
+#include <rpc/key_prot.h>
+#include <rpcsvc/yp_prot.h>
+#include <rpcsvc/ypclnt.h>
+#include <string.h>
+#include <stdlib.h>
+#include "un-namespace.h"
+
+#define PKFILE "/etc/publickey"
+
+/*
+ * Hack to let ypserv/rpc.nisd use AUTH_DES.
+ */
+int (*__getpublickey_LOCAL)() = 0;
+
+/*
+ * Get somebody's public key
+ */
+static int
+__getpublickey_real(netname, publickey)
+	const char *netname;
+	char *publickey;
+{
+	char lookup[3 * HEXKEYBYTES];
+	char *p;
+
+	if (publickey == NULL)
+		return (0);
+	if (!getpublicandprivatekey(netname, lookup))
+		return (0);
+	p = strchr(lookup, ':');
+	if (p == NULL) {
+		return (0);
+	}
+	*p = '\0';
+	(void) strncpy(publickey, lookup, HEXKEYBYTES);
+	publickey[HEXKEYBYTES] = '\0';
+	return (1);
+}
+
+/*
+ * reads the file /etc/publickey looking for a + to optionally go to the
+ * yellow pages
+ */
+
+int
+getpublicandprivatekey(key, ret)
+	const char *key;
+	char *ret;
+{
+	char buf[1024];	/* big enough */
+	char *res;
+	FILE *fd;
+	char *mkey;
+	char *mval;
+
+	fd = fopen(PKFILE, "r");
+	if (fd == NULL)
+		return (0);
+	for (;;) {
+		res = fgets(buf, sizeof(buf), fd);
+		if (res == NULL) {
+			fclose(fd);
+			return (0);
+		}
+		if (res[0] == '#')
+			continue;
+		else if (res[0] == '+') {
+#ifdef YP
+			char *PKMAP = "publickey.byname";
+			char *lookup;
+			char *domain;
+			int err;
+			int len;
+
+			err = yp_get_default_domain(&domain);
+			if (err) {
+				continue;
+			}
+			lookup = NULL;
+			err = yp_match(domain, PKMAP, key, strlen(key), &lookup, &len);
+			if (err) {
+#ifdef DEBUG
+				fprintf(stderr, "match failed error %d\n", err);
+#endif
+				continue;
+			}
+			lookup[len] = 0;
+			strcpy(ret, lookup);
+			fclose(fd);
+			free(lookup);
+			return (2);
+#else /* YP */
+#ifdef DEBUG
+			fprintf(stderr,
+"Bad record in %s '+' -- NIS not supported in this library copy\n", PKFILE);
+#endif /* DEBUG */
+			continue;
+#endif /* YP */
+		} else {
+			mkey = strsep(&res, "\t ");
+			if (mkey == NULL) {
+				fprintf(stderr,
+				"Bad record in %s -- %s", PKFILE, buf);
+				continue;
+			}
+			do {
+				mval = strsep(&res, " \t#\n");
+			} while (mval != NULL && !*mval);
+			if (mval == NULL) {
+				fprintf(stderr,
+			"Bad record in %s val problem - %s", PKFILE, buf);
+				continue;
+			}
+			if (strcmp(mkey, key) == 0) {
+				strcpy(ret, mval);
+				fclose(fd);
+				return (1);
+			}
+		}
+	}
+}
+
+int getpublickey(netname, publickey)
+	const char *netname;
+	char *publickey;
+{
+	if (__getpublickey_LOCAL != NULL)
+		return(__getpublickey_LOCAL(netname, publickey));
+	else
+		return(__getpublickey_real(netname, publickey));
+}