push this if no one complains by Wednesday
I think we should keep this telnetd and the legacy one in sync for
now, and consider them as a good candidate for a new
'rtems-net-services' repository.
On Mon, Mar 29, 2021 at 7:39 PM Vijay Kumar Banerjee <vi...@rtems.org> wrote:
>
> ping :)
>
> On Tue, Mar 23, 2021 at 2:10 PM Vijay Kumar Banerjee <vi...@rtems.org> wrote:
> >
> > The files have been taken from RTEMS repository with head commit at
> > bd9e45d91f77657445400bc2c814f251c9e37cef
> > ---
> > libbsd.py | 22 +-
> > rtemsbsd/include/rtems/telnetd.h | 137 +++++
> > rtemsbsd/telnetd/README | 23 +
> > rtemsbsd/telnetd/check_passwd.c | 106 ++++
> > rtemsbsd/telnetd/des.c | 873 +++++++++++++++++++++++++++++++
> > rtemsbsd/telnetd/des.h | 1 +
> > rtemsbsd/telnetd/genpw.c | 79 +++
> > rtemsbsd/telnetd/pty.c | 401 ++++++++++++++
> > rtemsbsd/telnetd/telnetd-init.c | 18 +
> > rtemsbsd/telnetd/telnetd.c | 449 ++++++++++++++++
> > 10 files changed, 2100 insertions(+), 9 deletions(-)
> > create mode 100644 rtemsbsd/include/rtems/telnetd.h
> > create mode 100644 rtemsbsd/telnetd/README
> > create mode 100644 rtemsbsd/telnetd/check_passwd.c
> > create mode 100644 rtemsbsd/telnetd/des.c
> > create mode 100644 rtemsbsd/telnetd/des.h
> > create mode 100644 rtemsbsd/telnetd/genpw.c
> > create mode 100644 rtemsbsd/telnetd/pty.c
> > create mode 100644 rtemsbsd/telnetd/telnetd-init.c
> > create mode 100644 rtemsbsd/telnetd/telnetd.c
> >
> > diff --git a/libbsd.py b/libbsd.py
> > index a2056f36..f7efda43 100644
> > --- a/libbsd.py
> > +++ b/libbsd.py
> > @@ -293,6 +293,12 @@ class rtems(builder.Module):
> > 'pppd/upap.c',
> > 'pppd/utils.c',
> > 'telnetd/telnetd-service.c',
> > + 'telnetd/check_passwd.c',
> > + 'telnetd/des.c',
> > + 'telnetd/pty.c',
> > + 'telnetd/genpw.c',
> > + 'telnetd/telnetd-init.c',
> > + 'telnetd/telnetd.c',
> > ],
> > mm.generator['source']()
> > )
> > @@ -5368,8 +5374,7 @@ class tests(builder.Module):
> > self.addTest(mm.generator['test']('arphole', ['test_main'],
> > runTest = False, netTest = True))
> > self.addTest(mm.generator['test']('telnetd01', ['test_main'],
> > - runTest = False, netTest = True,
> > - extraLibs = ['telnetd']))
> > + runTest = False, netTest = True))
> > self.addTest(mm.generator['test']('unix01', ['test_main']))
> > self.addTest(mm.generator['test']('ftpd01', ['test_main'],
> > netTest = True,
> > @@ -5397,27 +5402,26 @@ class tests(builder.Module):
> > self.addTest(mm.generator['test']('mutex01', ['test_main']))
> > self.addTest(mm.generator['test']('condvar01', ['test_main']))
> > self.addTest(mm.generator['test']('ppp01', ['test_main'], runTest
> > = False,
> > - extraLibs = ['ftpd', 'telnetd']))
> > + extraLibs = ['ftpd']))
> > self.addTest(mm.generator['test']('zerocopy01', ['test_main'],
> > - runTest = False, netTest = True,
> > - extraLibs = ['telnetd']))
> > + runTest = False, netTest = True))
> > self.addTest(mm.generator['test']('smp01', ['test_main'],
> > extraLibs = ['rtemstest']))
> > self.addTest(mm.generator['test']('media01', ['test_main'],
> > runTest = False,
> > - extraLibs = ['ftpd', 'telnetd']))
> > + extraLibs = ['ftpd']))
> > self.addTest(mm.generator['test']('mcast01', ['test_main']))
> > self.addTest(mm.generator['test']('vlan01', ['test_main'], netTest
> > = True))
> > self.addTest(mm.generator['test']('lagg01', ['test_main'], netTest
> > = True))
> > self.addTest(mm.generator['test']('log01', ['test_main']))
> > self.addTest(mm.generator['test']('rcconf01', ['test_main']))
> > self.addTest(mm.generator['test']('rcconf02', ['test_main'],
> > - extraLibs = ['ftpd', 'telnetd']))
> > + extraLibs = ['ftpd']))
> > self.addTest(mm.generator['test']('cdev01', ['test_main',
> > 'test_cdev']))
> > self.addTest(mm.generator['test']('pf01', ['test_main'],
> > - extraLibs = ['ftpd', 'telnetd']))
> > + extraLibs = ['ftpd']))
> > self.addTest(mm.generator['test']('pf02', ['test_main'],
> > runTest = False,
> > - extraLibs = ['ftpd', 'telnetd']))
> > + extraLibs = ['ftpd']))
> > self.addTest(mm.generator['test']('termios', ['test_main',
> >
> > 'test_termios_driver',
> >
> > 'test_termios_utilities']))
> > diff --git a/rtemsbsd/include/rtems/telnetd.h
> > b/rtemsbsd/include/rtems/telnetd.h
> > new file mode 100644
> > index 00000000..1f8e1c55
> > --- /dev/null
> > +++ b/rtemsbsd/include/rtems/telnetd.h
> > @@ -0,0 +1,137 @@
> > +/*
> > + * Original Author: Fernando RUIZ CASAS (fernando.r...@ctv.es)
> > + * May 2001
> > + * Reworked by Till Straumann and .h overhauled by Joel Sherrill.
> > + *
> > + * Copyright (c) 2009 embedded brains GmbH and others.
> > + *
> > + * embedded brains GmbH
> > + * Obere Lagerstr. 30
> > + * D-82178 Puchheim
> > + * Germany
> > + * <rt...@embedded-brains.de>
> > + *
> > + * The license and distribution terms for this file may be
> > + * found in the file LICENSE in this distribution or at
> > + * http://www.rtems.org/license/LICENSE.
> > + */
> > +
> > +#ifndef _RTEMS_TELNETD_H
> > +#define _RTEMS_TELNETD_H
> > +
> > +#include <rtems.h>
> > +#include <rtems/shell.h>
> > +
> > +#ifdef __cplusplus
> > +extern "C" {
> > +#endif
> > +
> > +bool rtems_telnetd_login_check(
> > + const char *user,
> > + const char *passphrase
> > +);
> > +
> > +/**
> > + * @brief Telnet command type.
> > + */
> > +typedef void (*rtems_telnetd_command)(
> > + char * /* device name */,
> > + void * /* arg */
> > +);
> > +
> > +/**
> > + * @brief Telnet configuration structure.
> > + */
> > +typedef struct {
> > + /**
> > + * @brief Function invoked for each Telnet connection.
> > + *
> > + * The first parameter contains the device name. The second parameter
> > + * contains the argument pointer of this configuration table.
> > + */
> > + rtems_telnetd_command command;
> > +
> > + /**
> > + * @brief Argument for command function.
> > + */
> > + void *arg;
> > +
> > + /**
> > + * @brief Task priority.
> > + *
> > + * Use 0 for the default value.
> > + */
> > + rtems_task_priority priority;
> > +
> > + /**
> > + * @brief Task stack size.
> > + *
> > + * Use 0 for the default value.
> > + */
> > + size_t stack_size;
> > +
> > + /**
> > + * @brief Login check function.
> > + *
> > + * Method used for login checks. Use @c NULL to disable a login check.
> > + */
> > + rtems_shell_login_check_t login_check;
> > +
> > + /**
> > + * @brief This is an obsolete configuration option.
> > + *
> > + * It must be set to false, otherwise rtems_telnetd_start() will do
> > nothing
> > + * and returns with a status of RTEMS_NOT_IMPLEMENTED.
> > + */
> > + bool keep_stdio;
> > +
> > + /**
> > + * @brief Maximum number of clients which can connect to the system at a
> > + * time.
> > + *
> > + * Use 0 for the default value.
> > + */
> > + uint16_t client_maximum;
> > +
> > + /**
> > + * @brief Server port number in host byte order.
> > + *
> > + * Use 0 for the default value.
> > + */
> > + uint16_t port;
> > +} rtems_telnetd_config_table;
> > +
> > +/**
> > + * @brief Starts the Telnet server using the provided configuration.
> > + *
> > + * @retval RTEMS_SUCCESSFUL Successful operation.
> > + * @retval RTEMS_INVALID_ADDRESS The command function in the configuration
> > is
> > + * @c NULL.
> > + * @retval RTEMS_RESOURCE_IN_USE The server port is already in use.
> > + * @retval RTEMS_NOT_IMPLEMENTED The keep stdio configuration option is
> > true.
> > + * @retval RTEMS_UNSATISFIED Not enough resources to start the Telnet
> > server or
> > + * task priority in configuration is invalid.
> > + */
> > +rtems_status_code rtems_telnetd_start(const rtems_telnetd_config_table
> > *config);
> > +
> > +/**
> > + * @brief Telnet configuration.
> > + *
> > + * The application must provide this configuration table. It is used by
> > + * rtems_telnetd_initialize() to configure the Telnet subsystem. Do not
> > modify
> > + * the entries after the intialization since it is used internally.
> > + */
> > +extern rtems_telnetd_config_table rtems_telnetd_config;
> > +
> > +/**
> > + * @brief Initializes the Telnet subsystem.
> > + *
> > + * Uses the application provided @ref rtems_telnetd_config configuration
> > table.
> > + */
> > +rtems_status_code rtems_telnetd_initialize(void);
> > +
> > +#ifdef __cplusplus
> > +}
> > +#endif
> > +
> > +#endif
> > diff --git a/rtemsbsd/telnetd/README b/rtemsbsd/telnetd/README
> > new file mode 100644
> > index 00000000..3807aa5e
> > --- /dev/null
> > +++ b/rtemsbsd/telnetd/README
> > @@ -0,0 +1,23 @@
> > +Author: fernando.r...@ctv.es (cor...@fernando-ruiz.com)
> > +
> > +This directory contains a telnetd server
> > +primary features:
> > +
> > + + create a user shell pseudo-terminal task.
> > +
> > +This code has not been extensively tested. It is provided as a tool
> > +for RTEMS users to open more shell tcp/ip pseudo-terminal.
> > +Suggestions and comments are appreciated.
> > +
> > +Read libmisc/shell for more information.
> > +
> > +NOTES:
> > +
> > +1. OOB not yet implemented. Only a reduced negotiation is implemented.
> > +
> > +2. If you have tcp/ip initialied you can start telnetd daemon.
> > + You need register pseudo-terminals driver into device drivers table.
> > +
> > +Enjoy it.
> > +
> > +FUTURE:
> > diff --git a/rtemsbsd/telnetd/check_passwd.c
> > b/rtemsbsd/telnetd/check_passwd.c
> > new file mode 100644
> > index 00000000..b4ea4d01
> > --- /dev/null
> > +++ b/rtemsbsd/telnetd/check_passwd.c
> > @@ -0,0 +1,106 @@
> > +/*
> > + * Authorship
> > + * ----------
> > + * This software was created by
> > + * Till Straumann <strau...@slac.stanford.edu>, 2003-2007
> > + * Stanford Linear Accelerator Center, Stanford University.
> > + *
> > + * Acknowledgement of sponsorship
> > + * ------------------------------
> > + * This software was produced by
> > + * the Stanford Linear Accelerator Center, Stanford University,
> > + * under Contract DE-AC03-76SFO0515 with the Department of Energy.
> > + *
> > + * Government disclaimer of liability
> > + * ----------------------------------
> > + * Neither the United States nor the United States Department of Energy,
> > + * nor any of their employees, makes any warranty, express or implied, or
> > + * assumes any legal liability or responsibility for the accuracy,
> > + * completeness, or usefulness of any data, apparatus, product, or process
> > + * disclosed, or represents that its use would not infringe privately owned
> > + * rights.
> > + *
> > + * Stanford disclaimer of liability
> > + * --------------------------------
> > + * Stanford University makes no representations or warranties, express or
> > + * implied, nor assumes any liability for the use of this software.
> > + *
> > + * Stanford disclaimer of copyright
> > + * --------------------------------
> > + * Stanford University, owner of the copyright, hereby disclaims its
> > + * copyright and all other rights in this software. Hence, anyone may
> > + * freely use it for any purpose without restriction.
> > + *
> > + * Maintenance of notices
> > + * ----------------------
> > + * In the interest of clarity regarding the origin and status of this
> > + * SLAC software, this and all the preceding Stanford University notices
> > + * are to remain affixed to any copy or derivative of this software made
> > + * or distributed by the recipient and are to be affixed to any copy of
> > + * software made or distributed by the recipient that contains a copy or
> > + * derivative of this software.
> > + *
> > + * ------------------ SLAC Software Notices, Set 4 OTT.002a, 2004 FEB 03
> > + *
> > + * Copyright (c) 2009 embedded brains GmbH and others.
> > + *
> > + * embedded brains GmbH
> > + * Obere Lagerstr. 30
> > + * D-82178 Puchheim
> > + * Germany
> > + * <rt...@embedded-brains.de>
> > + *
> > + * The license and distribution terms for this file may be
> > + * found in the file LICENSE in this distribution or at
> > + * http://www.rtems.org/license/LICENSE.
> > + */
> > +
> > +#ifdef HAVE_CONFIG_H
> > +#include "config.h"
> > +#endif
> > +
> > +#include <termios.h>
> > +#include <errno.h>
> > +#include <stdio.h>
> > +#include <unistd.h>
> > +#include <stdlib.h>
> > +#include <string.h>
> > +#include <syslog.h>
> > +
> > +#include <rtems/telnetd.h>
> > +
> > +#include "des.h"
> > +#include <rtems/passwd.h>
> > +
> > +/**
> > + * @brief Standard Telnet login check that uses DES to encrypt the
> > passphrase.
> > + *
> > + * Takes a @a passphrase, encrypts it and compares it to the encrypted
> > + * passphrase in the @c TELNETD_PASSWD environment variable. No password
> > is
> > + * required if @c TELNETD_PASSWD is unset. The argument @a user is
> > ignored.
> > + */
> > +bool rtems_telnetd_login_check(
> > + const char *user,
> > + const char *passphrase
> > +)
> > +{
> > + char *pw = getenv( "TELNETD_PASSWD");
> > + char cryptbuf [21];
> > + char salt [3];
> > +
> > + if (pw == NULL || strlen( pw) == 0) {
> > + #ifdef TELNETD_DEFAULT_PASSWD
> > + pw = TELNETD_DEFAULT_PASSWD;
> > + #else
> > + return true;
> > + #endif
> > + }
> > +
> > + strncpy( salt, pw, 2);
> > + salt [2] = '\0';
> > +
> > + return strcmp(
> > + __des_crypt_r( passphrase, salt, cryptbuf, sizeof( cryptbuf)),
> > + pw
> > + ) == 0;
> > +}
> > diff --git a/rtemsbsd/telnetd/des.c b/rtemsbsd/telnetd/des.c
> > new file mode 100644
> > index 00000000..1d0295a6
> > --- /dev/null
> > +++ b/rtemsbsd/telnetd/des.c
> > @@ -0,0 +1,873 @@
> > +/*
> > + * FreeSec: libcrypt for NetBSD
> > + *
> > + * Copyright (c) 1994 David Burren
> > + * All rights reserved.
> > + *
> > + * Ported to RTEMS and made reentrant by Till Straumann, 9/2003
> > + *
> > + * Adapted for FreeBSD-2.0 by Geoffrey M. Rehmet
> > + * this file should now *only* export crypt(), in order to make
> > + * binaries of libcrypt exportable from the USA
> > + *
> > + * Adapted for FreeBSD-4.0 by Mark R V Murray
> > + * this file should now *only* export crypt_des(), in order to make
> > + * a module that can be optionally included in libcrypt.
> > + *
> > + * 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.
> > + * 3. Neither the name of the author nor the names of other contributors
> > + * may be used to endorse or promote products derived from this software
> > + * without specific prior written permission.
> > + *
> > + * 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.
> > + *
> > + * This is an original implementation of the DES and the crypt(3)
> > interfaces
> > + * by David Burren <dav...@werj.com.au>.
> > + *
> > + * An excellent reference on the underlying algorithm (and related
> > + * algorithms) is:
> > + *
> > + * B. Schneier, Applied Cryptography: protocols, algorithms,
> > + * and source code in C, John Wiley & Sons, 1994.
> > + *
> > + * Note that in that book's description of DES the lookups for the initial,
> > + * pbox, and final permutations are inverted (this has been brought to the
> > + * attention of the author). A list of errata for this book has been
> > + * posted to the sci.crypt newsgroup by the author and is available for
> > FTP.
> > + *
> > + * ARCHITECTURE ASSUMPTIONS:
> > + * It is assumed that the 8-byte arrays passed by reference can be
> > + * addressed as arrays of u_int32_t's (ie. the CPU is not picky about
> > + * alignment).
> > + */
> > +
> > +#ifdef HAVE_CONFIG_H
> > +#include "config.h"
> > +#endif
> > +
> > +#define __FORCE_GLIBC
> > +#include <sys/cdefs.h>
> > +#include <sys/types.h>
> > +#include <sys/param.h>
> > +#include <netinet/in.h>
> > +#ifndef __rtems__
> > +#include <pwd.h>
> > +#include <crypt.h>
> > +#endif
> > +#include <string.h>
> > +#include <stdlib.h>
> > +
> > +#include "des.h"
> > +
> > +#define REENTRANT
> > +/* Re-entrantify me -- all this junk needs to be in
> > + * struct crypt_data to make this really reentrant... */
> > +
> > +/* TS; not really - only the stuff in Des_Context */
> > +static struct fixed1 {
> > +u_char inv_key_perm[64];
> > +u_char inv_comp_perm[56];
> > +u_char u_sbox[8][64];
> > +u_char un_pbox[32];
> > +} des1_f;
> > +static struct fixed2 {
> > +u_int32_t ip_maskl[8][256], ip_maskr[8][256];
> > +} des2_f;
> > +static struct fixed3 {
> > +u_int32_t fp_maskl[8][256], fp_maskr[8][256];
> > +} des3_f;
> > +static struct fixed4 {
> > +u_int32_t key_perm_maskl[8][128], key_perm_maskr[8][128];
> > +u_int32_t comp_maskl[8][128], comp_maskr[8][128];
> > +} des4_f;
> > +
> > +#define inv_key_perm des1_f.inv_key_perm
> > +#define inv_comp_perm des1_f.inv_comp_perm
> > +#define u_sbox des1_f.u_sbox
> > +#define un_pbox des1_f.un_pbox
> > +#define ip_maskl des2_f.ip_maskl
> > +#define ip_maskr des2_f.ip_maskr
> > +#define fp_maskl des3_f.fp_maskl
> > +#define fp_maskr des3_f.fp_maskr
> > +#define key_perm_maskl des4_f.key_perm_maskl
> > +#define key_perm_maskr des4_f.key_perm_maskr
> > +#define comp_maskl des4_f.comp_maskl
> > +#define comp_maskr des4_f.comp_maskr
> > +
> > +/* These need to be maintained per-process */
> > +struct Des_Context {
> > +u_int32_t en_keysl[16], en_keysr[16];
> > +u_int32_t de_keysl[16], de_keysr[16];
> > +u_int32_t saltbits;
> > +u_int32_t old_salt;
> > +u_int32_t old_rawkey0, old_rawkey1;
> > +};
> > +
> > +#ifndef REENTRANT
> > +static struct Des_Context single;
> > +#endif
> > +
> > +#define en_keysl des_ctx->en_keysl
> > +#define en_keysr des_ctx->en_keysr
> > +#define de_keysl des_ctx->de_keysl
> > +#define de_keysr des_ctx->de_keysr
> > +#define saltbits des_ctx->saltbits
> > +#define old_salt des_ctx->old_salt
> > +#define old_rawkey0 des_ctx->old_rawkey0
> > +#define old_rawkey1 des_ctx->old_rawkey1
> > +
> > +/* Static stuff that stays resident and doesn't change after
> > + * being initialized, and therefore doesn't need to be made
> > + * reentrant. */
> > +static u_char init_perm[64], final_perm[64];
> > +static u_char m_sbox[4][4096];
> > +static u_int32_t psbox[4][256];
> > +
> > +
> > +
> > +
> > +/* A pile of data */
> > +static const u_char ascii64[] =
> > "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
> > +
> > +static const u_char IP[64] = {
> > + 58, 50, 42, 34, 26, 18, 10, 2, 60, 52, 44, 36, 28, 20, 12, 4,
> > + 62, 54, 46, 38, 30, 22, 14, 6, 64, 56, 48, 40, 32, 24, 16, 8,
> > + 57, 49, 41, 33, 25, 17, 9, 1, 59, 51, 43, 35, 27, 19, 11, 3,
> > + 61, 53, 45, 37, 29, 21, 13, 5, 63, 55, 47, 39, 31, 23, 15, 7
> > +};
> > +
> > +static const u_char key_perm[56] = {
> > + 57, 49, 41, 33, 25, 17, 9, 1, 58, 50, 42, 34, 26, 18,
> > + 10, 2, 59, 51, 43, 35, 27, 19, 11, 3, 60, 52, 44, 36,
> > + 63, 55, 47, 39, 31, 23, 15, 7, 62, 54, 46, 38, 30, 22,
> > + 14, 6, 61, 53, 45, 37, 29, 21, 13, 5, 28, 20, 12, 4
> > +};
> > +
> > +static const u_char key_shifts[16] = {
> > + 1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1
> > +};
> > +
> > +static const u_char comp_perm[48] = {
> > + 14, 17, 11, 24, 1, 5, 3, 28, 15, 6, 21, 10,
> > + 23, 19, 12, 4, 26, 8, 16, 7, 27, 20, 13, 2,
> > + 41, 52, 31, 37, 47, 55, 30, 40, 51, 45, 33, 48,
> > + 44, 49, 39, 56, 34, 53, 46, 42, 50, 36, 29, 32
> > +};
> > +
> > +/*
> > + * No E box is used, as it's replaced by some ANDs, shifts, and ORs.
> > + */
> > +
> > +static const u_char sbox[8][64] = {
> > + {
> > + 14, 4, 13, 1, 2, 15, 11, 8, 3, 10, 6, 12, 5, 9, 0, 7,
> > + 0, 15, 7, 4, 14, 2, 13, 1, 10, 6, 12, 11, 9, 5, 3, 8,
> > + 4, 1, 14, 8, 13, 6, 2, 11, 15, 12, 9, 7, 3, 10, 5, 0,
> > + 15, 12, 8, 2, 4, 9, 1, 7, 5, 11, 3, 14, 10, 0, 6, 13
> > + },
> > + {
> > + 15, 1, 8, 14, 6, 11, 3, 4, 9, 7, 2, 13, 12, 0, 5, 10,
> > + 3, 13, 4, 7, 15, 2, 8, 14, 12, 0, 1, 10, 6, 9, 11, 5,
> > + 0, 14, 7, 11, 10, 4, 13, 1, 5, 8, 12, 6, 9, 3, 2, 15,
> > + 13, 8, 10, 1, 3, 15, 4, 2, 11, 6, 7, 12, 0, 5, 14, 9
> > + },
> > + {
> > + 10, 0, 9, 14, 6, 3, 15, 5, 1, 13, 12, 7, 11, 4, 2, 8,
> > + 13, 7, 0, 9, 3, 4, 6, 10, 2, 8, 5, 14, 12, 11, 15, 1,
> > + 13, 6, 4, 9, 8, 15, 3, 0, 11, 1, 2, 12, 5, 10, 14, 7,
> > + 1, 10, 13, 0, 6, 9, 8, 7, 4, 15, 14, 3, 11, 5, 2, 12
> > + },
> > + {
> > + 7, 13, 14, 3, 0, 6, 9, 10, 1, 2, 8, 5, 11, 12, 4, 15,
> > + 13, 8, 11, 5, 6, 15, 0, 3, 4, 7, 2, 12, 1, 10, 14, 9,
> > + 10, 6, 9, 0, 12, 11, 7, 13, 15, 1, 3, 14, 5, 2, 8, 4,
> > + 3, 15, 0, 6, 10, 1, 13, 8, 9, 4, 5, 11, 12, 7, 2, 14
> > + },
> > + {
> > + 2, 12, 4, 1, 7, 10, 11, 6, 8, 5, 3, 15, 13, 0, 14, 9,
> > + 14, 11, 2, 12, 4, 7, 13, 1, 5, 0, 15, 10, 3, 9, 8, 6,
> > + 4, 2, 1, 11, 10, 13, 7, 8, 15, 9, 12, 5, 6, 3, 0, 14,
> > + 11, 8, 12, 7, 1, 14, 2, 13, 6, 15, 0, 9, 10, 4, 5, 3
> > + },
> > + {
> > + 12, 1, 10, 15, 9, 2, 6, 8, 0, 13, 3, 4, 14, 7, 5, 11,
> > + 10, 15, 4, 2, 7, 12, 9, 5, 6, 1, 13, 14, 0, 11, 3, 8,
> > + 9, 14, 15, 5, 2, 8, 12, 3, 7, 0, 4, 10, 1, 13, 11, 6,
> > + 4, 3, 2, 12, 9, 5, 15, 10, 11, 14, 1, 7, 6, 0, 8, 13
> > + },
> > + {
> > + 4, 11, 2, 14, 15, 0, 8, 13, 3, 12, 9, 7, 5, 10, 6, 1,
> > + 13, 0, 11, 7, 4, 9, 1, 10, 14, 3, 5, 12, 2, 15, 8, 6,
> > + 1, 4, 11, 13, 12, 3, 7, 14, 10, 15, 6, 8, 0, 5, 9, 2,
> > + 6, 11, 13, 8, 1, 4, 10, 7, 9, 5, 0, 15, 14, 2, 3, 12
> > + },
> > + {
> > + 13, 2, 8, 4, 6, 15, 11, 1, 10, 9, 3, 14, 5, 0, 12, 7,
> > + 1, 15, 13, 8, 10, 3, 7, 4, 12, 5, 6, 11, 0, 14, 9, 2,
> > + 7, 11, 4, 1, 9, 12, 14, 2, 0, 6, 10, 13, 15, 3, 5, 8,
> > + 2, 1, 14, 7, 4, 10, 8, 13, 15, 12, 9, 0, 3, 5, 6, 11
> > + }
> > +};
> > +
> > +static const u_char pbox[32] = {
> > + 16, 7, 20, 21, 29, 12, 28, 17, 1, 15, 23, 26, 5, 18, 31, 10,
> > + 2, 8, 24, 14, 32, 27, 3, 9, 19, 13, 30, 6, 22, 11, 4, 25
> > +};
> > +
> > +static const u_int32_t bits32[32] =
> > +{
> > + 0x80000000, 0x40000000, 0x20000000, 0x10000000,
> > + 0x08000000, 0x04000000, 0x02000000, 0x01000000,
> > + 0x00800000, 0x00400000, 0x00200000, 0x00100000,
> > + 0x00080000, 0x00040000, 0x00020000, 0x00010000,
> > + 0x00008000, 0x00004000, 0x00002000, 0x00001000,
> > + 0x00000800, 0x00000400, 0x00000200, 0x00000100,
> > + 0x00000080, 0x00000040, 0x00000020, 0x00000010,
> > + 0x00000008, 0x00000004, 0x00000002, 0x00000001
> > +};
> > +
> > +static const u_char bits8[8] = { 0x80, 0x40, 0x20, 0x10, 0x08, 0x04,
> > 0x02, 0x01 };
> > +static const u_int32_t *bits28, *bits24;
> > +
> > +
> > +static int
> > +ascii_to_bin(char ch)
> > +{
> > + if (ch > 'z')
> > + return(0);
> > + if (ch >= 'a')
> > + return(ch - 'a' + 38);
> > + if (ch > 'Z')
> > + return(0);
> > + if (ch >= 'A')
> > + return(ch - 'A' + 12);
> > + if (ch > '9')
> > + return(0);
> > + if (ch >= '.')
> > + return(ch - '.');
> > + return(0);
> > +}
> > +
> > +static struct Des_Context *
> > +des_ctx_init(void)
> > +{
> > +struct Des_Context *des_ctx;
> > +#ifdef REENTRANT
> > + des_ctx = malloc(sizeof(*des_ctx));
> > +#else
> > + des_ctx = &single;
> > +#endif
> > + old_rawkey0 = old_rawkey1 = 0L;
> > + saltbits = 0L;
> > + old_salt = 0L;
> > +
> > + return des_ctx;
> > +}
> > +
> > +static void
> > +des_init(void)
> > +{
> > + int i, j, b, k, inbit, obit;
> > + u_int32_t *p, *il, *ir, *fl, *fr;
> > + static int des_initialised = 0;
> > +
> > + if (des_initialised==1)
> > + return;
> > +
> > +#ifndef REENTRANT
> > + des_ctx_init();
> > +#endif
> > +
> > + bits24 = (bits28 = bits32 + 4) + 4;
> > +
> > + /*
> > + * Invert the S-boxes, reordering the input bits.
> > + */
> > + for (i = 0; i < 8; i++)
> > + for (j = 0; j < 64; j++) {
> > + b = (j & 0x20) | ((j & 1) << 4) | ((j >> 1) & 0xf);
> > + u_sbox[i][j] = sbox[i][b];
> > + }
> > +
> > + /*
> > + * Convert the inverted S-boxes into 4 arrays of 8 bits.
> > + * Each will handle 12 bits of the S-box input.
> > + */
> > + for (b = 0; b < 4; b++)
> > + for (i = 0; i < 64; i++)
> > + for (j = 0; j < 64; j++)
> > + m_sbox[b][(i << 6) | j] =
> > + (u_char)((u_sbox[(b << 1)][i] << 4) |
> > + u_sbox[(b << 1) + 1][j]);
> > +
> > + /*
> > + * Set up the initial & final permutations into a useful form, and
> > + * initialise the inverted key permutation.
> > + */
> > + for (i = 0; i < 64; i++) {
> > + init_perm[final_perm[i] = IP[i] - 1] = (u_char)i;
> > + inv_key_perm[i] = 255;
> > + }
> > +
> > + /*
> > + * Invert the key permutation and initialise the inverted key
> > + * compression permutation.
> > + */
> > + for (i = 0; i < 56; i++) {
> > + inv_key_perm[key_perm[i] - 1] = (u_char)i;
> > + inv_comp_perm[i] = 255;
> > + }
> > +
> > + /*
> > + * Invert the key compression permutation.
> > + */
> > + for (i = 0; i < 48; i++) {
> > + inv_comp_perm[comp_perm[i] - 1] = (u_char)i;
> > + }
> > +
> > + /*
> > + * Set up the OR-mask arrays for the initial and final permutations,
> > + * and for the key initial and compression permutations.
> > + */
> > + for (k = 0; k < 8; k++) {
> > + for (i = 0; i < 256; i++) {
> > + *(il = &ip_maskl[k][i]) = 0L;
> > + *(ir = &ip_maskr[k][i]) = 0L;
> > + *(fl = &fp_maskl[k][i]) = 0L;
> > + *(fr = &fp_maskr[k][i]) = 0L;
> > + for (j = 0; j < 8; j++) {
> > + inbit = 8 * k + j;
> > + if (i & bits8[j]) {
> > + if ((obit = init_perm[inbit]) < 32)
> > + *il |= bits32[obit];
> > + else
> > + *ir |= bits32[obit-32];
> > + if ((obit = final_perm[inbit]) < 32)
> > + *fl |= bits32[obit];
> > + else
> > + *fr |= bits32[obit - 32];
> > + }
> > + }
> > + }
> > + for (i = 0; i < 128; i++) {
> > + *(il = &key_perm_maskl[k][i]) = 0L;
> > + *(ir = &key_perm_maskr[k][i]) = 0L;
> > + for (j = 0; j < 7; j++) {
> > + inbit = 8 * k + j;
> > + if (i & bits8[j + 1]) {
> > + if ((obit = inv_key_perm[inbit]) == 255)
> > + continue;
> > + if (obit < 28)
> > + *il |= bits28[obit];
> > + else
> > + *ir |= bits28[obit - 28];
> > + }
> > + }
> > + *(il = &comp_maskl[k][i]) = 0L;
> > + *(ir = &comp_maskr[k][i]) = 0L;
> > + for (j = 0; j < 7; j++) {
> > + inbit = 7 * k + j;
> > + if (i & bits8[j + 1]) {
> > + if ((obit=inv_comp_perm[inbit]) == 255)
> > + continue;
> > + if (obit < 24)
> > + *il |= bits24[obit];
> > + else
> > + *ir |= bits24[obit - 24];
> > + }
> > + }
> > + }
> > + }
> > +
> > + /*
> > + * Invert the P-box permutation, and convert into OR-masks for
> > + * handling the output of the S-box arrays setup above.
> > + */
> > + for (i = 0; i < 32; i++)
> > + un_pbox[pbox[i] - 1] = (u_char)i;
> > +
> > + for (b = 0; b < 4; b++)
> > + for (i = 0; i < 256; i++) {
> > + *(p = &psbox[b][i]) = 0L;
> > + for (j = 0; j < 8; j++) {
> > + if (i & bits8[j])
> > + *p |= bits32[un_pbox[8 * b + j]];
> > + }
> > + }
> > +
> > + des_initialised = 1;
> > +}
> > +
> > +
> > +static void
> > +setup_salt(long salt, struct Des_Context *des_ctx)
> > +{
> > + u_int32_t obit, saltbit;
> > + int i;
> > +
> > + if (salt == old_salt)
> > + return;
> > + old_salt = salt;
> > +
> > + saltbits = 0L;
> > + saltbit = 1;
> > + obit = 0x800000;
> > + for (i = 0; i < 24; i++) {
> > + if (salt & saltbit)
> > + saltbits |= obit;
> > + saltbit <<= 1;
> > + obit >>= 1;
> > + }
> > +}
> > +
> > +
> > +static int
> > +des_setkey(const char *key, struct Des_Context *des_ctx)
> > +{
> > + u_int32_t k0, k1, rawkey0, rawkey1;
> > + int shifts, round;
> > +
> > + des_init();
> > +
> > + rawkey0 = ntohl(*(const u_int32_t *) key);
> > + rawkey1 = ntohl(*(const u_int32_t *) (key + 4));
> > +
> > + if ((rawkey0 | rawkey1)
> > + && rawkey0 == old_rawkey0
> > + && rawkey1 == old_rawkey1) {
> > + /*
> > + * Already setup for this key.
> > + * This optimisation fails on a zero key (which is weak and
> > + * has bad parity anyway) in order to simplify the starting
> > + * conditions.
> > + */
> > + return(0);
> > + }
> > + old_rawkey0 = rawkey0;
> > + old_rawkey1 = rawkey1;
> > +
> > + /*
> > + * Do key permutation and split into two 28-bit subkeys.
> > + */
> > + k0 = key_perm_maskl[0][rawkey0 >> 25]
> > + | key_perm_maskl[1][(rawkey0 >> 17) & 0x7f]
> > + | key_perm_maskl[2][(rawkey0 >> 9) & 0x7f]
> > + | key_perm_maskl[3][(rawkey0 >> 1) & 0x7f]
> > + | key_perm_maskl[4][rawkey1 >> 25]
> > + | key_perm_maskl[5][(rawkey1 >> 17) & 0x7f]
> > + | key_perm_maskl[6][(rawkey1 >> 9) & 0x7f]
> > + | key_perm_maskl[7][(rawkey1 >> 1) & 0x7f];
> > + k1 = key_perm_maskr[0][rawkey0 >> 25]
> > + | key_perm_maskr[1][(rawkey0 >> 17) & 0x7f]
> > + | key_perm_maskr[2][(rawkey0 >> 9) & 0x7f]
> > + | key_perm_maskr[3][(rawkey0 >> 1) & 0x7f]
> > + | key_perm_maskr[4][rawkey1 >> 25]
> > + | key_perm_maskr[5][(rawkey1 >> 17) & 0x7f]
> > + | key_perm_maskr[6][(rawkey1 >> 9) & 0x7f]
> > + | key_perm_maskr[7][(rawkey1 >> 1) & 0x7f];
> > + /*
> > + * Rotate subkeys and do compression permutation.
> > + */
> > + shifts = 0;
> > + for (round = 0; round < 16; round++) {
> > + u_int32_t t0, t1;
> > +
> > + shifts += key_shifts[round];
> > +
> > + t0 = (k0 << shifts) | (k0 >> (28 - shifts));
> > + t1 = (k1 << shifts) | (k1 >> (28 - shifts));
> > +
> > + de_keysl[15 - round] =
> > + en_keysl[round] = comp_maskl[0][(t0 >> 21) & 0x7f]
> > + | comp_maskl[1][(t0 >> 14) & 0x7f]
> > + | comp_maskl[2][(t0 >> 7) & 0x7f]
> > + | comp_maskl[3][t0 & 0x7f]
> > + | comp_maskl[4][(t1 >> 21) & 0x7f]
> > + | comp_maskl[5][(t1 >> 14) & 0x7f]
> > + | comp_maskl[6][(t1 >> 7) & 0x7f]
> > + | comp_maskl[7][t1 & 0x7f];
> > +
> > + de_keysr[15 - round] =
> > + en_keysr[round] = comp_maskr[0][(t0 >> 21) & 0x7f]
> > + | comp_maskr[1][(t0 >> 14) & 0x7f]
> > + | comp_maskr[2][(t0 >> 7) & 0x7f]
> > + | comp_maskr[3][t0 & 0x7f]
> > + | comp_maskr[4][(t1 >> 21) & 0x7f]
> > + | comp_maskr[5][(t1 >> 14) & 0x7f]
> > + | comp_maskr[6][(t1 >> 7) & 0x7f]
> > + | comp_maskr[7][t1 & 0x7f];
> > + }
> > + return(0);
> > +}
> > +
> > +
> > +static int
> > +do_des( u_int32_t l_in, u_int32_t r_in, u_int32_t *l_out, u_int32_t
> > *r_out, int count, struct Des_Context *des_ctx)
> > +{
> > + /*
> > + * l_in, r_in, l_out, and r_out are in pseudo-"big-endian" format.
> > + */
> > + u_int32_t l, r, *kl, *kr, *kl1, *kr1;
> > + u_int32_t f, r48l, r48r;
> > + int round;
> > +
> > + if (count == 0) {
> > + return(1);
> > + } else if (count > 0) {
> > + /*
> > + * Encrypting
> > + */
> > + kl1 = en_keysl;
> > + kr1 = en_keysr;
> > + } else {
> > + /*
> > + * Decrypting
> > + */
> > + count = -count;
> > + kl1 = de_keysl;
> > + kr1 = de_keysr;
> > + }
> > +
> > + /*
> > + * Do initial permutation (IP).
> > + */
> > + l = ip_maskl[0][l_in >> 24]
> > + | ip_maskl[1][(l_in >> 16) & 0xff]
> > + | ip_maskl[2][(l_in >> 8) & 0xff]
> > + | ip_maskl[3][l_in & 0xff]
> > + | ip_maskl[4][r_in >> 24]
> > + | ip_maskl[5][(r_in >> 16) & 0xff]
> > + | ip_maskl[6][(r_in >> 8) & 0xff]
> > + | ip_maskl[7][r_in & 0xff];
> > + r = ip_maskr[0][l_in >> 24]
> > + | ip_maskr[1][(l_in >> 16) & 0xff]
> > + | ip_maskr[2][(l_in >> 8) & 0xff]
> > + | ip_maskr[3][l_in & 0xff]
> > + | ip_maskr[4][r_in >> 24]
> > + | ip_maskr[5][(r_in >> 16) & 0xff]
> > + | ip_maskr[6][(r_in >> 8) & 0xff]
> > + | ip_maskr[7][r_in & 0xff];
> > +
> > + while (count--) {
> > + /*
> > + * Do each round.
> > + */
> > + kl = kl1;
> > + kr = kr1;
> > + round = 16;
> > + while (round--) {
> > + /*
> > + * Expand R to 48 bits (simulate the E-box).
> > + */
> > + r48l = ((r & 0x00000001) << 23)
> > + | ((r & 0xf8000000) >> 9)
> > + | ((r & 0x1f800000) >> 11)
> > + | ((r & 0x01f80000) >> 13)
> > + | ((r & 0x001f8000) >> 15);
> > +
> > + r48r = ((r & 0x0001f800) << 7)
> > + | ((r & 0x00001f80) << 5)
> > + | ((r & 0x000001f8) << 3)
> > + | ((r & 0x0000001f) << 1)
> > + | ((r & 0x80000000) >> 31);
> > + /*
> > + * Do salting for crypt() and friends, and
> > + * XOR with the permuted key.
> > + */
> > + f = (r48l ^ r48r) & saltbits;
> > + r48l ^= f ^ *kl++;
> > + r48r ^= f ^ *kr++;
> > + /*
> > + * Do sbox lookups (which shrink it back to 32 bits)
> > + * and do the pbox permutation at the same time.
> > + */
> > + f = psbox[0][m_sbox[0][r48l >> 12]]
> > + | psbox[1][m_sbox[1][r48l & 0xfff]]
> > + | psbox[2][m_sbox[2][r48r >> 12]]
> > + | psbox[3][m_sbox[3][r48r & 0xfff]];
> > + /*
> > + * Now that we've permuted things, complete f().
> > + */
> > + f ^= l;
> > + l = r;
> > + r = f;
> > + }
> > + r = l;
> > + l = f;
> > + }
> > + /*
> > + * Do final permutation (inverse of IP).
> > + */
> > + *l_out = fp_maskl[0][l >> 24]
> > + | fp_maskl[1][(l >> 16) & 0xff]
> > + | fp_maskl[2][(l >> 8) & 0xff]
> > + | fp_maskl[3][l & 0xff]
> > + | fp_maskl[4][r >> 24]
> > + | fp_maskl[5][(r >> 16) & 0xff]
> > + | fp_maskl[6][(r >> 8) & 0xff]
> > + | fp_maskl[7][r & 0xff];
> > + *r_out = fp_maskr[0][l >> 24]
> > + | fp_maskr[1][(l >> 16) & 0xff]
> > + | fp_maskr[2][(l >> 8) & 0xff]
> > + | fp_maskr[3][l & 0xff]
> > + | fp_maskr[4][r >> 24]
> > + | fp_maskr[5][(r >> 16) & 0xff]
> > + | fp_maskr[6][(r >> 8) & 0xff]
> > + | fp_maskr[7][r & 0xff];
> > + return(0);
> > +}
> > +
> > +
> > +#if 0
> > +static int
> > +des_cipher(const char *in, char *out, u_int32_t salt, int count)
> > +{
> > + u_int32_t l_out, r_out, rawl, rawr;
> > + int retval;
> > + union {
> > + u_int32_t *ui32;
> > + const char *c;
> > + } trans;
> > +
> > + des_init();
> > +
> > + setup_salt(salt);
> > +
> > + trans.c = in;
> > + rawl = ntohl(*trans.ui32++);
> > + rawr = ntohl(*trans.ui32);
> > +
> > + retval = do_des(rawl, rawr, &l_out, &r_out, count);
> > +
> > + trans.c = out;
> > + *trans.ui32++ = htonl(l_out);
> > + *trans.ui32 = htonl(r_out);
> > + return(retval);
> > +}
> > +#endif
> > +
> > +
> > +#ifndef REENTRANT
> > +void
> > +setkey(const char *key)
> > +{
> > + int i, j;
> > + u_int32_t packed_keys[2];
> > + u_char *p;
> > +
> > + p = (u_char *) packed_keys;
> > +
> > + for (i = 0; i < 8; i++) {
> > + p[i] = 0;
> > + for (j = 0; j < 8; j++)
> > + if (*key++ & 1)
> > + p[i] |= bits8[j];
> > + }
> > + des_setkey(p, &single);
> > +}
> > +#endif
> > +
> > +
> > +#ifndef REENTRANT
> > +void
> > +encrypt(char *block, int flag)
> > +{
> > + u_int32_t io[2];
> > + u_char *p;
> > + int i, j;
> > +
> > + des_init();
> > +
> > + setup_salt(0L, &single);
> > + p = block;
> > + for (i = 0; i < 2; i++) {
> > + io[i] = 0L;
> > + for (j = 0; j < 32; j++)
> > + if (*p++ & 1)
> > + io[i] |= bits32[j];
> > + }
> > + do_des(io[0], io[1], io, io + 1, flag ? -1 : 1, &single);
> > + for (i = 0; i < 2; i++)
> > + for (j = 0; j < 32; j++)
> > + block[(i << 5) | j] = (io[i] & bits32[j]) ? 1 : 0;
> > +}
> > +
> > +#endif
> > +
> > +char *
> > +__des_crypt_r(const char *key, const char *setting, char *output, int sz)
> > +{
> > + char *rval = 0;
> > + struct Des_Context *des_ctx;
> > + u_int32_t count, salt, l, r0, r1, keybuf[2];
> > + u_char *p, *q;
> > +
> > + if (sz < 21)
> > + return NULL;
> > +
> > + des_init();
> > + des_ctx = des_ctx_init();
> > +
> > + /*
> > + * Copy the key, shifting each character up by one bit
> > + * and padding with zeros.
> > + */
> > + q = (u_char *)keybuf;
> > + while (q - (u_char *)keybuf - 8) {
> > + *q++ = *key << 1;
> > + if (*(q - 1))
> > + key++;
> > + }
> > + if (des_setkey((char *)keybuf, des_ctx))
> > + goto bailout;
> > +
> > +#if 0
> > + if (*setting == _PASSWORD_EFMT1) {
> > + int i;
> > + /*
> > + * "new"-style:
> > + * setting - underscore, 4 bytes of count, 4 bytes of salt
> > + * key - unlimited characters
> > + */
> > + for (i = 1, count = 0L; i < 5; i++)
> > + count |= ascii_to_bin(setting[i]) << ((i - 1) * 6);
> > +
> > + for (i = 5, salt = 0L; i < 9; i++)
> > + salt |= ascii_to_bin(setting[i]) << ((i - 5) * 6);
> > +
> > + while (*key) {
> > + /*
> > + * Encrypt the key with itself.
> > + */
> > + if (des_cipher((char *)keybuf, (char *)keybuf, 0L, 1))
> > + goto bailout;
> > + /*
> > + * And XOR with the next 8 characters of the key.
> > + */
> > + q = (u_char *)keybuf;
> > + while (q - (u_char *)keybuf - 8 && *key)
> > + *q++ ^= *key++ << 1;
> > +
> > + if (des_setkey((char *)keybuf))
> > + goto bailout;
> > + }
> > + strncpy(output, setting, 9);
> > +
> > + /*
> > + * Double check that we weren't given a short setting.
> > + * If we were, the above code will probably have created
> > + * wierd values for count and salt, but we don't really care.
> > + * Just make sure the output string doesn't have an extra
> > + * NUL in it.
> > + */
> > + output[9] = '\0';
> > + p = (u_char *)output + strlen(output);
> > + } else
> > +#endif
> > + {
> > + /*
> > + * "old"-style:
> > + * setting - 2 bytes of salt
> > + * key - up to 8 characters
> > + */
> > + count = 25;
> > +
> > + salt = (ascii_to_bin(setting[1]) << 6)
> > + | ascii_to_bin(setting[0]);
> > +
> > + output[0] = setting[0];
> > + /*
> > + * If the encrypted password that the salt was extracted from
> > + * is only 1 character long, the salt will be corrupted. We
> > + * need to ensure that the output string doesn't have an extra
> > + * NUL in it!
> > + */
> > + output[1] = setting[1] ? setting[1] : output[0];
> > +
> > + p = (u_char *)output + 2;
> > + }
> > + setup_salt(salt, des_ctx);
> > + /*
> > + * Do it.
> > + */
> > + if (do_des(0L, 0L, &r0, &r1, (int)count, des_ctx))
> > + goto bailout;
> > + /*
> > + * Now encode the result...
> > + */
> > + l = (r0 >> 8);
> > + *p++ = ascii64[(l >> 18) & 0x3f];
> > + *p++ = ascii64[(l >> 12) & 0x3f];
> > + *p++ = ascii64[(l >> 6) & 0x3f];
> > + *p++ = ascii64[l & 0x3f];
> > +
> > + l = (r0 << 16) | ((r1 >> 16) & 0xffff);
> > + *p++ = ascii64[(l >> 18) & 0x3f];
> > + *p++ = ascii64[(l >> 12) & 0x3f];
> > + *p++ = ascii64[(l >> 6) & 0x3f];
> > + *p++ = ascii64[l & 0x3f];
> > +
> > + l = r1 << 2;
> > + *p++ = ascii64[(l >> 12) & 0x3f];
> > + *p++ = ascii64[(l >> 6) & 0x3f];
> > + *p++ = ascii64[l & 0x3f];
> > + *p = 0;
> > +
> > + rval = output;
> > +bailout:
> > + free(des_ctx);
> > + return rval;
> > +}
> > +
> > +#ifdef DEBUG
> > +
> > +void
> > +des_snap(void **pf, void **pd)
> > +{
> > + uint8* pfc;
> > + *pf = malloc(sizeof(struct fixed1) + sizeof(struct fixed2) +
> > sizeof(struct fixed3) + sizeof(struct fixed4));
> > + pfc = *pf;
> > + memcpy(pfc, &des1_f, sizeof(des1_f));
> > + pfc += sizeof(des1_f);
> > + memcpy(pfc, &des2_f, sizeof(des2_f));
> > + pfc += sizeof(des2_f);
> > + memcpy(pfc, &des3_f, sizeof(des3_f));
> > + pfc += sizeof(des3_f);
> > + memcpy(pfc, &des4_f, sizeof(des4_f));
> > +// *pd = malloc(sizeof(struct Des_Context));
> > +// memcpy(*pd, &des_ctx, sizeof(des_ctx));
> > +}
> > +
> > +void
> > +des_check(void *pf, void *pd)
> > +{
> > + uint8* pfc1, pfc2, pfc3, pfc4;
> > + pfc1 = pf;
> > + pfc2 = pfc1 + sizeof(des1_f);
> > + pfc3 = pfc2 + sizeof(des2_f);
> > + pfc4 = pfc3 + sizeof(des3_f);
> > + printf("Fixed: do%s differ"/*", Context: do%s differ"*/"\n",
> > + (memcmp(pfc1, &des1_f, sizeof(des1_f)) ||
> > + memcmp(pfc2, &des2_f, sizeof(des2_f)) ||
> > + memcmp(pfc3, &des4_f, sizeof(des3_f)) ||
> > + memcmp(pfc4, &des4_f, sizeof(des4_f))) ? "" : "nt");
> > +}
> > +
> > +#endif
> > diff --git a/rtemsbsd/telnetd/des.h b/rtemsbsd/telnetd/des.h
> > new file mode 100644
> > index 00000000..382dab7a
> > --- /dev/null
> > +++ b/rtemsbsd/telnetd/des.h
> > @@ -0,0 +1 @@
> > +char *__des_crypt_r(const char *, const char *, char *, int);
> > diff --git a/rtemsbsd/telnetd/genpw.c b/rtemsbsd/telnetd/genpw.c
> > new file mode 100644
> > index 00000000..1cb30bc6
> > --- /dev/null
> > +++ b/rtemsbsd/telnetd/genpw.c
> > @@ -0,0 +1,79 @@
> > +/*
> > + * Authorship
> > + * ----------
> > + * This software was created by
> > + * Till Straumann <strau...@slac.stanford.edu>, 2003-2007
> > + * Stanford Linear Accelerator Center, Stanford University.
> > + *
> > + * Acknowledgement of sponsorship
> > + * ------------------------------
> > + * This software was produced by
> > + * the Stanford Linear Accelerator Center, Stanford University,
> > + * under Contract DE-AC03-76SFO0515 with the Department of Energy.
> > + *
> > + * Government disclaimer of liability
> > + * ----------------------------------
> > + * Neither the United States nor the United States Department of Energy,
> > + * nor any of their employees, makes any warranty, express or implied, or
> > + * assumes any legal liability or responsibility for the accuracy,
> > + * completeness, or usefulness of any data, apparatus, product, or process
> > + * disclosed, or represents that its use would not infringe privately owned
> > + * rights.
> > + *
> > + * Stanford disclaimer of liability
> > + * --------------------------------
> > + * Stanford University makes no representations or warranties, express or
> > + * implied, nor assumes any liability for the use of this software.
> > + *
> > + * Stanford disclaimer of copyright
> > + * --------------------------------
> > + * Stanford University, owner of the copyright, hereby disclaims its
> > + * copyright and all other rights in this software. Hence, anyone may
> > + * freely use it for any purpose without restriction.
> > + *
> > + * Maintenance of notices
> > + * ----------------------
> > + * In the interest of clarity regarding the origin and status of this
> > + * SLAC software, this and all the preceding Stanford University notices
> > + * are to remain affixed to any copy or derivative of this software made
> > + * or distributed by the recipient and are to be affixed to any copy of
> > + * software made or distributed by the recipient that contains a copy or
> > + * derivative of this software.
> > + *
> > + * ------------------ SLAC Software Notices, Set 4 OTT.002a, 2004 FEB 03
> > + */
> > +
> > +#ifdef HAVE_CONFIG_H
> > +#include "config.h"
> > +#endif
> > +
> > +#include <crypt.h>
> > +#include <stdio.h>
> > +#include <unistd.h>
> > +
> > +static void
> > +usage(char *nm)
> > +{
> > + fprintf(stderr,"Usage: %s [-h] [-s salt] cleartext_password\n", nm);
> > +}
> > +
> > +int
> > +main(int argc, char **argv)
> > +{
> > +int ch;
> > +char *salt="td";
> > + while ( (ch=getopt(argc, argv, "hs:")) >=0 ) {
> > + switch (ch) {
> > + default: fprintf(stderr,"Unknown Option '%c'\n",ch);
> > + case 'h': usage(argv[0]);
> > + return 0;
> > + case 's': salt=optarg;
> > + break;
> > + }
> > + }
> > + if ( optind >= argc ) {
> > + usage(argv[0]);
> > + return 1;
> > + }
> > + printf("#define TELNETD_DEFAULT_PASSWD
> > \"%s\"\n",crypt(argv[optind],salt));
> > +}
> > diff --git a/rtemsbsd/telnetd/pty.c b/rtemsbsd/telnetd/pty.c
> > new file mode 100644
> > index 00000000..a593bbd2
> > --- /dev/null
> > +++ b/rtemsbsd/telnetd/pty.c
> > @@ -0,0 +1,401 @@
> > +/*
> > + * /dev/ptyXX (Support for pseudo-terminals)
> > + *
> > + * Original Author: Fernando RUIZ CASAS (fernando.r...@ctv.es)
> > + * May 2001
> > + *
> > + * This program 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.
> > + *
> > + * Till Straumann <strau...@slac.stanford.edu>
> > + *
> > + * - converted into a loadable module
> > + * - NAWS support / ioctls for querying/setting the window
> > + * size added.
> > + * - don't delete the running task when the connection
> > + * is closed. Rather let 'read()' return a 0 count so
> > + * they may cleanup. Some magic hack works around termios
> > + * limitation.
> > + */
> > +
> > +#ifdef HAVE_CONFIG_H
> > +#include "config.h"
> > +#endif
> > +
> > +#define DEBUG_WH (1<<0)
> > +#define DEBUG_DETAIL (1<<1)
> > +
> > +/* #define DEBUG DEBUG_WH */
> > +
> > +/*-----------------------------------------*/
> > +#include <sys/ttycom.h>
> > +#include <rtems/pty.h>
> > +#include <rtems/seterr.h>
> > +#include <errno.h>
> > +#include <sys/socket.h>
> > +/*-----------------------------------------*/
> > +#include <inttypes.h>
> > +#include <stdio.h>
> > +#include <stdlib.h>
> > +#include <string.h>
> > +#include <syslog.h>
> > +#include <unistd.h>
> > +/*-----------------------------------------*/
> > +#define IAC_ESC 255
> > +#define IAC_DONT 254
> > +#define IAC_DO 253
> > +#define IAC_WONT 252
> > +#define IAC_WILL 251
> > +#define IAC_SB 250
> > +#define IAC_GA 249
> > +#define IAC_EL 248
> > +#define IAC_EC 247
> > +#define IAC_AYT 246
> > +#define IAC_AO 245
> > +#define IAC_IP 244
> > +#define IAC_BRK 243
> > +#define IAC_DMARK 242
> > +#define IAC_NOP 241
> > +#define IAC_SE 240
> > +#define IAC_EOR 239
> > +
> > +#define SB_MAX RTEMS_PTY_SB_MAX
> > +
> > +static bool ptyPollInitialize(rtems_termios_tty *,
> > + rtems_termios_device_context *, struct termios *,
> > + rtems_libio_open_close_args_t *);
> > +static void ptyShutdown(rtems_termios_tty *,
> > + rtems_termios_device_context *, rtems_libio_open_close_args_t *);
> > +static void ptyPollWrite(rtems_termios_device_context *, const char *,
> > size_t);
> > +static int ptyPollRead(rtems_termios_device_context *);
> > +static bool ptySetAttributes(rtems_termios_device_context *,
> > + const struct termios *);
> > +static int my_pty_control(rtems_termios_device_context *,
> > + ioctl_command_t, void *);
> > +
> > +static const rtems_termios_device_handler pty_handler = {
> > + .first_open = ptyPollInitialize,
> > + .last_close = ptyShutdown,
> > + .poll_read = ptyPollRead,
> > + .write = ptyPollWrite,
> > + .set_attributes = ptySetAttributes,
> > + .ioctl = my_pty_control
> > +};
> > +
> > +static
> > +int send_iac(rtems_pty_context *pty, unsigned char mode, unsigned char
> > option)
> > +{
> > + unsigned char buf[3];
> > +
> > + buf[0]=IAC_ESC;
> > + buf[1]=mode;
> > + buf[2]=option;
> > + return write(pty->socket, buf, sizeof(buf));
> > +}
> > +
> > +const char *rtems_pty_initialize(rtems_pty_context *pty, uintptr_t unique)
> > +{
> > + rtems_status_code sc;
> > +
> > + memset(pty, 0, sizeof(*pty));
> > + (void)snprintf(pty->name, sizeof(pty->name), "/dev/pty%" PRIuPTR,
> > unique);
> > + rtems_termios_device_context_initialize(&pty->base, "pty");
> > + pty->socket = -1;
> > + sc = rtems_termios_device_install(pty->name, &pty_handler, NULL,
> > &pty->base);
> > + if (sc != RTEMS_SUCCESSFUL) {
> > + return NULL;
> > + }
> > +
> > + return pty->name;
> > +}
> > +
> > +void rtems_pty_close_socket(rtems_pty_context *pty)
> > +{
> > + if (pty->socket >= 0) {
> > + (void)close(pty->socket);
> > + pty->socket = -1;
> > + }
> > +}
> > +
> > +void rtems_pty_set_socket(rtems_pty_context *pty, int socket)
> > +{
> > + struct timeval t;
> > +
> > + rtems_pty_close_socket(pty);
> > + pty->socket = socket;
> > +
> > + /* set a long polling interval to save CPU time */
> > + t.tv_sec=2;
> > + t.tv_usec=00000;
> > + (void)setsockopt(socket, SOL_SOCKET, SO_RCVTIMEO, &t, sizeof(t));
> > +
> > + /* inform the client that we will echo */
> > + send_iac(pty, IAC_WILL, 1);
> > +}
> > +
> > +/*-----------------------------------------------------------*/
> > +/*
> > + * The NVT terminal is negociated in PollRead and PollWrite
> > + * with every BYTE sendded or received.
> > + * A litle status machine in the pty_read_byte(int minor)
> > + *
> > + */
> > +static const char IAC_AYT_RSP[]="\r\nAYT? Yes, RTEMS-SHELL is here\r\n";
> > +static const char IAC_BRK_RSP[]="<*Break*>";
> > +static const char IAC_IP_RSP []="<*Interrupt*>";
> > +
> > +static int
> > +handleSB(rtems_pty_context *pty)
> > +{
> > + switch (pty->sb_buf[0]) {
> > + case 31: /* NAWS */
> > + pty->width = (pty->sb_buf[1]<<8) + pty->sb_buf[2];
> > + pty->height = (pty->sb_buf[3]<<8) + pty->sb_buf[4];
> > +#if DEBUG & DEBUG_WH
> > + fprintf(stderr,
> > + "Setting width/height to %ix%i\n",
> > + pty->width,
> > + pty->height);
> > +#endif
> > + break;
> > + default:
> > + break;
> > + }
> > + return 0;
> > +}
> > +
> > +static int ptyPollRead(rtems_termios_device_context *base)
> > +{ /* Characters written to the client side*/
> > + rtems_pty_context *pty = (rtems_pty_context *)base;
> > + unsigned char value;
> > + unsigned int omod;
> > + int count;
> > + int result;
> > +
> > + count=read(pty->socket,&value,sizeof(value));
> > + if (count<0)
> > + return -1;
> > +
> > + if (count<1) {
> > + /* Unfortunately, there is no way of passing an EOF
> > + * condition through the termios driver. Hence, we
> > + * resort to an ugly hack. Setting cindex>ccount
> > + * causes the termios driver to return a read count
> > + * of '0' which is what we want here. We leave
> > + * 'errno' untouched.
> > + */
> > + pty->ttyp->cindex=pty->ttyp->ccount+1;
> > + return pty->ttyp->termios.c_cc[VEOF];
> > + };
> > +
> > + omod=pty->iac_mode;
> > + pty->iac_mode=0;
> > + switch(omod & 0xff) {
> > + case IAC_ESC:
> > + switch(value) {
> > + case IAC_ESC :
> > + /* in case this is an ESC ESC sequence in SB mode */
> > + pty->iac_mode = omod>>8;
> > + return IAC_ESC;
> > + case IAC_DONT:
> > + case IAC_DO :
> > + case IAC_WONT:
> > + case IAC_WILL:
> > + pty->iac_mode=value;
> > + return -1;
> > + case IAC_SB :
> > +#if DEBUG & DEBUG_DETAIL
> > + printk("SB\n");
> > +#endif
> > + pty->iac_mode=value;
> > + pty->sb_ind=0;
> > + return -100;
> > + case IAC_GA :
> > + return -1;
> > + case IAC_EL :
> > + return 0x03; /* Ctrl-C*/
> > + case IAC_EC :
> > + return '\b';
> > + case IAC_AYT :
> > + write(pty->socket,IAC_AYT_RSP,strlen(IAC_AYT_RSP));
> > + return -1;
> > + case IAC_AO :
> > + return -1;
> > + case IAC_IP :
> > + write(pty->socket,IAC_IP_RSP,strlen(IAC_IP_RSP));
> > + return -1;
> > + case IAC_BRK :
> > + write(pty->socket,IAC_BRK_RSP,strlen(IAC_BRK_RSP));
> > + return -1;
> > + case IAC_DMARK:
> > + return -2;
> > + case IAC_NOP :
> > + return -1;
> > + case IAC_SE :
> > +#if DEBUG & DEBUG_DETAIL
> > + {
> > + int i;
> > + printk("SE");
> > + for (i=0; i<pty->sb_ind; i++)
> > + printk(" %02x",pty->sb_buf[i]);
> > + printk("\n");
> > + }
> > +#endif
> > + handleSB(pty);
> > + return -101;
> > + case IAC_EOR :
> > + return -102;
> > + default :
> > + return -1;
> > + };
> > + break;
> > +
> > + case IAC_SB:
> > + pty->iac_mode=omod;
> > + if (IAC_ESC==value) {
> > + pty->iac_mode=(omod<<8)|value;
> > + } else {
> > + if (pty->sb_ind < SB_MAX)
> > + pty->sb_buf[pty->sb_ind++]=value;
> > + }
> > + return -1;
> > +
> > + case IAC_WILL:
> > + if (value==34){
> > + send_iac(pty,IAC_DONT, 34); /*LINEMODE*/
> > + send_iac(pty,IAC_DO , 1); /*ECHO */
> > + } else if (value==31) {
> > + send_iac(pty,IAC_DO , 31); /*NAWS */
> > +#if DEBUG & DEBUG_DETAIL
> > + printk("replied DO NAWS\n");
> > +#endif
> > + } else {
> > + send_iac(pty,IAC_DONT,value);
> > + }
> > + return -1;
> > + case IAC_DONT:
> > + return -1;
> > + case IAC_DO :
> > + if (value==3) {
> > + send_iac(pty,IAC_WILL, 3); /* GO AHEAD*/
> > + } else if (value==1) {
> > + send_iac(pty,IAC_WILL, 1); /* ECHO */
> > + } else {
> > + send_iac(pty,IAC_WONT,value);
> > + };
> > + return -1;
> > + case IAC_WONT:
> > + if (value==1) {
> > + send_iac(pty,IAC_WILL, 1);
> > + } else { /* ECHO */
> > + send_iac(pty,IAC_WONT,value);
> > + }
> > + return -1;
> > + default:
> > + if (value==IAC_ESC) {
> > + pty->iac_mode=value;
> > + return -1;
> > + } else {
> > + result=value;
> > + if ( 0
> > + /* map CRLF to CR for symmetry */
> > + || ((value=='\n') && pty->last_cr)
> > + /* map telnet CRNUL to CR down here */
> > + || ((value==0) && pty->last_cr)
> > + ) result=-1;
> > + pty->last_cr=(value=='\r');
> > + return result;
> > + };
> > + };
> > + /* should never get here but keep compiler happy */
> > + return -1;
> > +}
> > +
> > +/*-----------------------------------------------------------*/
> > +/* Set the 'Hardware' */
> > +/*-----------------------------------------------------------*/
> > +static bool
> > +ptySetAttributes(rtems_termios_device_context *base, const struct termios
> > *t)
> > +{
> > + rtems_pty_context *pty = (rtems_pty_context *)base;
> > + pty->c_cflag = t->c_cflag;
> > + return true;
> > +}
> > +/*-----------------------------------------------------------*/
> > +static bool
> > +ptyPollInitialize(rtems_termios_tty *ttyp,
> > + rtems_termios_device_context *base, struct termios *t,
> > + rtems_libio_open_close_args_t *args)
> > +{
> > + rtems_pty_context *pty = (rtems_pty_context *)base;
> > + pty->ttyp = ttyp;
> > + pty->iac_mode = 0;
> > + pty->sb_ind = 0;
> > + pty->width = 0;
> > + pty->height = 0;
> > + return ptySetAttributes(&pty->base, t);
> > +}
> > +/*-----------------------------------------------------------*/
> > +static void
> > +ptyShutdown(rtems_termios_tty *ttyp,
> > + rtems_termios_device_context *base, rtems_libio_open_close_args_t *arg)
> > +{
> > + rtems_pty_context *pty = (rtems_pty_context *)base;
> > + close(pty->socket);
> > +}
> > +/*-----------------------------------------------------------*/
> > +/* Write Characters into pty device */
> > +/*-----------------------------------------------------------*/
> > +static void
> > +ptyPollWrite(rtems_termios_device_context *base, const char *buf, size_t
> > len)
> > +{
> > + rtems_pty_context *pty = (rtems_pty_context *)base;
> > +
> > + while (len > 0) {
> > + ssize_t n = write(pty->socket, buf, len);
> > + if (n <= 0) {
> > + break;
> > + }
> > +
> > + buf += (size_t)n;
> > + len -= (size_t)n;
> > + }
> > +}
> > +
> > +static int
> > +my_pty_control(rtems_termios_device_context *base,
> > + ioctl_command_t request, void *buffer)
> > +{
> > + rtems_pty_context *p = (rtems_pty_context *)base;
> > + struct winsize *wp = buffer;
> > +
> > + switch (request) {
> > + case TIOCGWINSZ:
> > + wp->ws_row = p->height;
> > + wp->ws_col = p->width;
> > +#if DEBUG & DEBUG_WH
> > + fprintf(stderr,
> > + "ioctl(TIOCGWINSZ), returning %ix%i\n",
> > + wp->ws_col,
> > + wp->ws_row);
> > +#endif
> > + break;
> > + case TIOCSWINSZ:
> > +#if DEBUG & DEBUG_WH
> > + fprintf(stderr,
> > + "ioctl(TIOCGWINSZ), setting %ix%i\n",
> > + wp->ws_col,
> > + wp->ws_row);
> > +#endif
> > +
> > + p->height = wp->ws_row;
> > + p->width = wp->ws_col;
> > + break;
> > + default:
> > + rtems_set_errno_and_return_minus_one(EINVAL);
> > + break;
> > + }
> > +
> > + return 0;
> > +}
> > diff --git a/rtemsbsd/telnetd/telnetd-init.c
> > b/rtemsbsd/telnetd/telnetd-init.c
> > new file mode 100644
> > index 00000000..586aaef7
> > --- /dev/null
> > +++ b/rtemsbsd/telnetd/telnetd-init.c
> > @@ -0,0 +1,18 @@
> > +/*
> > + * Copyright (c) 2018 embedded brains GmbH. All rights reserved.
> > + *
> > + * The license and distribution terms for this file may be
> > + * found in the file LICENSE in this distribution or at
> > + * http://www.rtems.org/license/LICENSE.
> > + */
> > +
> > +#ifdef HAVE_CONFIG_H
> > +#include "config.h"
> > +#endif
> > +
> > +#include <rtems/telnetd.h>
> > +
> > +rtems_status_code rtems_telnetd_initialize( void )
> > +{
> > + return rtems_telnetd_start( &rtems_telnetd_config );
> > +}
> > diff --git a/rtemsbsd/telnetd/telnetd.c b/rtemsbsd/telnetd/telnetd.c
> > new file mode 100644
> > index 00000000..705e0956
> > --- /dev/null
> > +++ b/rtemsbsd/telnetd/telnetd.c
> > @@ -0,0 +1,449 @@
> > +/***********************************************************/
> > +/*
> > + *
> > + * The telnet DAEMON
> > + *
> > + * Author: 17,may 2001
> > + *
> > + * WORK: fernando.r...@ctv.es
> > + * HOME: cor...@fernando-ruiz.com
> > + *
> > + * After start the net you can start this daemon.
> > + * It uses the previously inited pseudo-terminales (pty.c)
> > + * getting a new terminal with getpty(). This function
> > + * gives a terminal name passing a opened socket like parameter.
> > + *
> > + * With register_telnetd() you add a new command in the shell to start
> > + * this daemon interactively. (Login in /dev/console of course)
> > + *
> > + * Sorry but OOB is not still implemented. (This is the first version)
> > + *
> > + * Till Straumann <strau...@slac.stanford.edu>
> > + * - made the 'shell' interface more generic, i.e. it is now
> > + * possible to have 'telnetd' run an arbitrary 'shell'
> > + * program.
> > + *
> > + * Copyright (c) 2009, 2018 embedded brains GmbH and others.
> > + *
> > + * embedded brains GmbH
> > + * Dornierstr. 4
> > + * D-82178 Puchheim
> > + * Germany
> > + * <rt...@embedded-brains.de>
> > + *
> > + * The license and distribution terms for this file may be
> > + * found in the file LICENSE in this distribution or at
> > + * http://www.rtems.org/license/LICENSE.
> > + */
> > +
> > +#ifdef HAVE_CONFIG_H
> > +#include "config.h"
> > +#endif
> > +
> > +#include <sys/queue.h>
> > +#include <sys/socket.h>
> > +#include <netinet/in.h>
> > +#include <arpa/inet.h>
> > +#include <inttypes.h>
> > +#include <unistd.h>
> > +#include <stdlib.h>
> > +#include <stdio.h>
> > +#include <string.h>
> > +#include <syslog.h>
> > +
> > +#include <rtems.h>
> > +#include <rtems/pty.h>
> > +#include <rtems/shell.h>
> > +#include <rtems/telnetd.h>
> > +#include <rtems/thread.h>
> > +#include <rtems/userenv.h>
> > +
> > +#define TELNETD_EVENT_SUCCESS RTEMS_EVENT_0
> > +
> > +#define TELNETD_EVENT_ERROR RTEMS_EVENT_1
> > +
> > +typedef struct telnetd_context telnetd_context;
> > +
> > +typedef struct telnetd_session {
> > + rtems_pty_context pty;
> > + char peername[16];
> > + telnetd_context *ctx;
> > + rtems_id task_id;
> > + LIST_ENTRY(telnetd_session) link;
> > +} telnetd_session;
> > +
> > +struct telnetd_context {
> > + rtems_telnetd_config_table config;
> > + int server_socket;
> > + rtems_id task_id;
> > + rtems_mutex mtx;
> > + LIST_HEAD(, telnetd_session) free_sessions;
> > + telnetd_session sessions[RTEMS_ZERO_LENGTH_ARRAY];
> > +};
> > +
> > +typedef union {
> > + struct sockaddr_in sin;
> > + struct sockaddr sa;
> > +} telnetd_address;
> > +
> > +RTEMS_NO_RETURN static void telnetd_session_fatal_error(
> > + const telnetd_context *ctx
> > +)
> > +{
> > + (void)rtems_event_send(ctx->task_id, TELNETD_EVENT_ERROR);
> > + rtems_task_exit();
> > +}
> > +
> > +static bool telnetd_login(telnetd_context *ctx, telnetd_session *session)
> > +{
> > + bool success;
> > +
> > + if (ctx->config.login_check == NULL) {
> > + return true;
> > + }
> > +
> > + success = rtems_shell_login_prompt(
> > + stdin,
> > + stderr,
> > + session->pty.name,
> > + ctx->config.login_check
> > + );
> > +
> > + if (!success) {
> > + syslog(
> > + LOG_AUTHPRIV | LOG_WARNING,
> > + "telnetd: too many wrong passwords entered from %s",
> > + session->peername
> > + );
> > + }
> > +
> > + return success;
> > +}
> > +
> > +static void telnetd_session_task(rtems_task_argument arg)
> > +{
> > + rtems_status_code sc;
> > + telnetd_session *session;
> > + telnetd_context *ctx;
> > + const char *path;
> > +
> > + session = (telnetd_session *) arg;
> > + ctx = session->ctx;
> > +
> > + sc = rtems_libio_set_private_env();
> > + if (sc != RTEMS_SUCCESSFUL) {
> > + telnetd_session_fatal_error(ctx);
> > + }
> > +
> > + path = rtems_pty_get_path(&session->pty);
> > +
> > + stdin = fopen(path, "r+");
> > + if (stdin == NULL) {
> > + telnetd_session_fatal_error(ctx);
> > + }
> > +
> > + stdout = fopen(path, "r+");
> > + if (stdout == NULL) {
> > + telnetd_session_fatal_error(ctx);
> > + }
> > +
> > + stderr = fopen(path, "r+");
> > + if (stderr == NULL) {
> > + telnetd_session_fatal_error(ctx);
> > + }
> > +
> > + (void)rtems_event_send(ctx->task_id, TELNETD_EVENT_SUCCESS);
> > +
> > + while (true) {
> > + rtems_event_set events;
> > +
> > + (void)rtems_event_system_receive(
> > + RTEMS_EVENT_SYSTEM_SERVER,
> > + RTEMS_WAIT | RTEMS_EVENT_ALL,
> > + RTEMS_NO_TIMEOUT,
> > + &events
> > + );
> > +
> > + syslog(
> > + LOG_DAEMON | LOG_INFO,
> > + "telnetd: accepted connection from %s on %s",
> > + session->peername,
> > + path
> > + );
> > +
> > + if (telnetd_login(ctx, session)) {
> > + (*ctx->config.command)(session->pty.name, ctx->config.arg);
> > + }
> > +
> > + syslog(
> > + LOG_DAEMON | LOG_INFO,
> > + "telnetd: releasing connection from %s on %s",
> > + session->peername,
> > + path
> > + );
> > +
> > + rtems_pty_close_socket(&session->pty);
> > +
> > + rtems_mutex_lock(&ctx->mtx);
> > + LIST_INSERT_HEAD(&ctx->free_sessions, session, link);
> > + rtems_mutex_unlock(&ctx->mtx);
> > + }
> > +}
> > +
> > +static void telnetd_sleep_after_error(void)
> > +{
> > + /* If something went wrong, sleep for some time */
> > + rtems_task_wake_after(10 * rtems_clock_get_ticks_per_second());
> > +}
> > +
> > +static void telnetd_server_task(rtems_task_argument arg)
> > +{
> > + telnetd_context *ctx;
> > +
> > + ctx = (telnetd_context *) arg;
> > +
> > + while (true) {
> > + telnetd_address peer;
> > + socklen_t address_len;
> > + int session_socket;
> > + telnetd_session *session;
> > +
> > + address_len = sizeof(peer.sin);
> > + session_socket = accept(ctx->server_socket, &peer.sa, &address_len);
> > + if (session_socket < 0) {
> > + syslog(LOG_DAEMON | LOG_ERR, "telnetd: cannot accept session");
> > + telnetd_sleep_after_error();
> > + continue;
> > + };
> > +
> > + rtems_mutex_lock(&ctx->mtx);
> > + session = LIST_FIRST(&ctx->free_sessions);
> > +
> > + if (session == NULL) {
> > + rtems_mutex_unlock(&ctx->mtx);
> > +
> > + (void)close(session_socket);
> > + syslog(LOG_DAEMON | LOG_ERR, "telnetd: no free session available");
> > + telnetd_sleep_after_error();
> > + continue;
> > + }
> > +
> > + LIST_REMOVE(session, link);
> > + rtems_mutex_unlock(&ctx->mtx);
> > +
> > + rtems_pty_set_socket(&session->pty, session_socket);
> > +
> > + if (
> > + inet_ntop(
> > + AF_INET,
> > + &peer.sin.sin_addr,
> > + session->peername,
> > + sizeof(session->peername)
> > + ) == NULL
> > + ) {
> > + strlcpy(session->peername, "<UNKNOWN>", sizeof(session->peername));
> > + }
> > +
> > + (void)rtems_event_system_send(session->task_id,
> > RTEMS_EVENT_SYSTEM_SERVER);
> > + }
> > +}
> > +
> > +static void telnetd_destroy_context(telnetd_context *ctx)
> > +{
> > + telnetd_session *session;
> > +
> > + LIST_FOREACH(session, &ctx->free_sessions, link) {
> > + if (session->task_id != 0) {
> > + (void)rtems_task_delete(session->task_id);
> > + }
> > +
> > + (void)unlink(rtems_pty_get_path(&session->pty));
> > + }
> > +
> > + if (ctx->server_socket >= 0) {
> > + (void)close(ctx->server_socket);
> > + }
> > +
> > + rtems_mutex_destroy(&ctx->mtx);
> > + free(ctx);
> > +}
> > +
> > +static rtems_status_code telnetd_create_server_socket(telnetd_context *ctx)
> > +{
> > + telnetd_address srv;
> > + socklen_t address_len;
> > + int enable;
> > +
> > + ctx->server_socket = socket(PF_INET, SOCK_STREAM, 0);
> > + if (ctx->server_socket < 0) {
> > + syslog(LOG_DAEMON | LOG_ERR, "telnetd: cannot create server socket");
> > + return RTEMS_UNSATISFIED;
> > + }
> > +
> > + enable = 1;
> > + (void)setsockopt(
> > + ctx->server_socket,
> > + SOL_SOCKET,
> > + SO_KEEPALIVE,
> > + &enable,
> > + sizeof(enable)
> > + );
> > +
> > + memset(&srv, 0, sizeof(srv));
> > + srv.sin.sin_family = AF_INET;
> > + srv.sin.sin_port = htons(ctx->config.port);
> > + address_len = sizeof(srv.sin);
> > +
> > + if (bind(ctx->server_socket, &srv.sa, address_len) != 0) {
> > + syslog(LOG_DAEMON | LOG_ERR, "telnetd: cannot bind server socket");
> > + return RTEMS_RESOURCE_IN_USE;
> > + };
> > +
> > + if (listen(ctx->server_socket, ctx->config.client_maximum) != 0) {
> > + syslog(LOG_DAEMON | LOG_ERR, "telnetd: cannot listen on server
> > socket");
> > + return RTEMS_UNSATISFIED;
> > + };
> > +
> > + return RTEMS_SUCCESSFUL;
> > +}
> > +
> > +static rtems_status_code telnetd_create_session_tasks(telnetd_context *ctx)
> > +{
> > + uint16_t i;
> > +
> > + ctx->task_id = rtems_task_self();
> > +
> > + for (i = 0; i < ctx->config.client_maximum; ++i) {
> > + telnetd_session *session;
> > + rtems_status_code sc;
> > + const char *path;
> > + rtems_event_set events;
> > +
> > + session = &ctx->sessions[i];
> > + session->ctx = ctx;
> > + rtems_mutex_init(&ctx->mtx, "Telnet");
> > + LIST_INSERT_HEAD(&ctx->free_sessions, session, link);
> > +
> > + sc = rtems_task_create(
> > + rtems_build_name('T', 'N', 'T', 'a' + i % 26),
> > + ctx->config.priority,
> > + ctx->config.stack_size,
> > + RTEMS_DEFAULT_MODES,
> > + RTEMS_FLOATING_POINT,
> > + &session->task_id
> > + );
> > + if (sc != RTEMS_SUCCESSFUL) {
> > + syslog(LOG_DAEMON | LOG_ERR, "telnetd: cannot create session task");
> > + return RTEMS_UNSATISFIED;
> > + }
> > +
> > + path = rtems_pty_initialize(&session->pty, i);
> > + if (path == NULL) {
> > + syslog(LOG_DAEMON | LOG_ERR, "telnetd: cannot create session PTY");
> > + return RTEMS_UNSATISFIED;
> > + }
> > +
> > + (void)rtems_task_start(
> > + session->task_id,
> > + telnetd_session_task,
> > + (rtems_task_argument) session
> > + );
> > +
> > + (void)rtems_event_receive(
> > + TELNETD_EVENT_SUCCESS | TELNETD_EVENT_ERROR,
> > + RTEMS_WAIT | RTEMS_EVENT_ANY,
> > + RTEMS_NO_TIMEOUT,
> > + &events
> > + );
> > +
> > + if ((events & TELNETD_EVENT_ERROR) != 0) {
> > + syslog(LOG_DAEMON | LOG_ERR, "telnetd: cannot initialize session
> > task");
> > + return RTEMS_UNSATISFIED;
> > + }
> > + }
> > +
> > + return RTEMS_SUCCESSFUL;
> > +}
> > +
> > +rtems_status_code rtems_telnetd_start(const rtems_telnetd_config_table*
> > config)
> > +{
> > + telnetd_context *ctx;
> > + rtems_status_code sc;
> > + uint16_t client_maximum;
> > +
> > + if (config->command == NULL) {
> > + syslog(LOG_DAEMON | LOG_ERR, "telnetd: configuration with invalid
> > command");
> > + return RTEMS_INVALID_ADDRESS;
> > + }
> > +
> > + if (config->client_maximum == 0) {
> > + client_maximum = 5;
> > + } else {
> > + client_maximum = config->client_maximum;
> > + }
> > +
> > + ctx = calloc(
> > + 1,
> > + sizeof(*ctx) + client_maximum * sizeof(ctx->sessions[0])
> > + );
> > + if (ctx == NULL) {
> > + syslog(LOG_DAEMON | LOG_ERR, "telnetd: cannot allocate server
> > context");
> > + return RTEMS_UNSATISFIED;
> > + }
> > +
> > + ctx->config = *config;
> > + ctx->config.client_maximum = client_maximum;
> > + ctx->server_socket = -1;
> > + LIST_INIT(&ctx->free_sessions);
> > +
> > + if (ctx->config.priority == 0) {
> > + ctx->config.priority = 100;
> > + }
> > +
> > + /* Check stack size */
> > + if (ctx->config.stack_size == 0) {
> > + ctx->config.stack_size = (size_t)32 * 1024;
> > + }
> > +
> > + if (ctx->config.port == 0) {
> > + ctx->config.port = 23;
> > + }
> > +
> > + sc = telnetd_create_server_socket(ctx);
> > + if (sc != RTEMS_SUCCESSFUL) {
> > + telnetd_destroy_context(ctx);
> > + return sc;
> > + }
> > +
> > + sc = telnetd_create_session_tasks(ctx);
> > + if (sc != RTEMS_SUCCESSFUL) {
> > + telnetd_destroy_context(ctx);
> > + return sc;
> > + }
> > +
> > + sc = rtems_task_create(
> > + rtems_build_name('T', 'N', 'T', 'D'),
> > + ctx->config.priority,
> > + RTEMS_MINIMUM_STACK_SIZE,
> > + RTEMS_DEFAULT_MODES,
> > + RTEMS_FLOATING_POINT,
> > + &ctx->task_id
> > + );
> > + if (sc != RTEMS_SUCCESSFUL) {
> > + syslog(LOG_DAEMON | LOG_ERR, "telnetd: cannot create server task");
> > + telnetd_destroy_context(ctx);
> > + return RTEMS_UNSATISFIED;
> > + }
> > +
> > + (void)rtems_task_start(
> > + ctx->task_id,
> > + telnetd_server_task,
> > + (rtems_task_argument) ctx
> > + );
> > +
> > + syslog(
> > + LOG_DAEMON | LOG_INFO,
> > + "telnetd: started successfully on port %" PRIu16, ctx->config.port
> > + );
> > + return RTEMS_SUCCESSFUL;
> > +}
> > --
> > 2.26.2
> >
> _______________________________________________
> devel mailing list
> devel@rtems.org
> http://lists.rtems.org/mailman/listinfo/devel
_______________________________________________
devel mailing list
devel@rtems.org
http://lists.rtems.org/mailman/listinfo/devel
