Initial import of TACACS+ client library donated by Juniper Networks, Inc.

1 files changed, 152 insertions, 0 deletions

diff --git a/lib/libtacplus/taclib_private.h b/lib/libtacplus/taclib_private.h
new file mode 100644
index 0000000..830fc92
--- /dev/null
+++ b/lib/libtacplus/taclib_private.h
@@ -0,0 +1,152 @@
+/*-
+ * Copyright 1998 Juniper Networks, 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:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+ *
+ *	$FreeBSD$
+ */
+
+#ifndef TACLIB_PRIVATE_H
+#define TACLIB_PRIVATE_H
+
+#include "taclib.h"
+
+/* Defaults */
+#define PATH_TACPLUS_CONF	"/etc/tacplus.conf"
+#define TACPLUS_PORT		49
+#define TIMEOUT			3	/* In seconds */
+
+/* Limits */
+#define BODYSIZE	8150		/* Maximum message body size */
+#define ERRSIZE		128		/* Maximum error message length */
+#define MAXCONFLINE	1024		/* Maximum config file line length */
+#define MAXSERVERS	10		/* Maximum number of servers to try */
+
+/* Protocol constants. */
+#define HDRSIZE		12		/* Size of message header */
+
+/* Protocol version number */
+#define TAC_VER_MAJOR		0xc		/* Major version number */
+
+/* Protocol packet types */
+#define TAC_AUTHEN		0x01		/* Authentication */
+#define TAC_AUTHOR		0x02		/* Authorization */
+#define TAC_ACCT		0x03		/* Accouting */
+
+/* Protocol header flags */
+#define TAC_UNENCRYPTED		0x01
+#define TAC_SINGLE_CONNECT	0x04
+
+struct tac_server {
+	struct sockaddr_in addr;	/* Address of server */
+	char		*secret;	/* Shared secret */
+	int		 timeout;	/* Timeout in seconds */
+	int		 flags;
+};
+
+/*
+ * An optional string of bytes specified by the client for inclusion in
+ * a request.  The data is always a dynamically allocated copy that
+ * belongs to the library.  It is copied into the request packet just
+ * before sending the request.
+ */
+struct clnt_str {
+	void		*data;
+	size_t		 len;
+};
+
+/*
+ * An optional string of bytes from a server response.  The data resides
+ * in the response packet itself, and must not be freed.
+ */
+struct srvr_str {
+	const void	*data;
+	size_t		 len;
+};
+
+struct tac_authen_start {
+	u_int8_t	action;
+	u_int8_t	priv_lvl;
+	u_int8_t	authen_type;
+	u_int8_t	service;
+	u_int8_t	user_len;
+	u_int8_t	port_len;
+	u_int8_t	rem_addr_len;
+	u_int8_t	data_len;
+	unsigned char	rest[1];
+};
+
+struct tac_authen_reply {
+	u_int8_t	status;
+	u_int8_t	flags;
+	u_int16_t	msg_len;
+	u_int16_t	data_len;
+	unsigned char	rest[1];
+};
+
+struct tac_authen_cont {
+	u_int16_t	user_msg_len;
+	u_int16_t	data_len;
+	u_int8_t	flags;
+	unsigned char	rest[1];
+};
+
+struct tac_msg {
+	u_int8_t	version;
+	u_int8_t	type;
+	u_int8_t	seq_no;
+	u_int8_t	flags;
+	u_int8_t	session_id[4];
+	u_int32_t	length;
+	union {
+		struct tac_authen_start authen_start;
+		struct tac_authen_reply authen_reply;
+		struct tac_authen_cont authen_cont;
+		unsigned char body[BODYSIZE];
+	} u;
+};
+
+struct tac_handle {
+	int		 fd;		/* Socket file descriptor */
+	struct tac_server servers[MAXSERVERS];	/* Servers to contact */
+	int		 num_servers;	/* Number of valid server entries */
+	int		 cur_server;	/* Server we are currently using */
+	int		 single_connect;	/* Use a single connection */
+	int		 last_seq_no;
+	char		 errmsg[ERRSIZE];	/* Most recent error message */
+
+	struct clnt_str	 user;
+	struct clnt_str	 port;
+	struct clnt_str	 rem_addr;
+	struct clnt_str	 data;
+	struct clnt_str	 user_msg;
+
+	struct tac_msg	 request;
+	struct tac_msg	 response;
+
+	int		 srvr_pos;	/* Scan position in response body */
+	struct srvr_str	 srvr_msg;
+	struct srvr_str	 srvr_data;
+};
+
+#endif