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Diffstat (limited to 'rtemsbsd/telnetd/check_passwd.c')
-rw-r--r-- | rtemsbsd/telnetd/check_passwd.c | 106 |
1 files changed, 106 insertions, 0 deletions
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 <strauman@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 + * <rtems@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; +} |