[8ad6681b] | 1 | /* $Id$ */ |
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| 2 | |
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[8a775c27] | 3 | /* |
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[8ad6681b] | 4 | * Authorship |
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| 5 | * ---------- |
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| 6 | * This software was created by |
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| 7 | * Till Straumann <strauman@slac.stanford.edu>, 2003-2007 |
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| 8 | * Stanford Linear Accelerator Center, Stanford University. |
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[8a775c27] | 9 | * |
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[8ad6681b] | 10 | * Acknowledgement of sponsorship |
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| 11 | * ------------------------------ |
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| 12 | * This software was produced by |
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| 13 | * the Stanford Linear Accelerator Center, Stanford University, |
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| 14 | * under Contract DE-AC03-76SFO0515 with the Department of Energy. |
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[8a775c27] | 15 | * |
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[8ad6681b] | 16 | * Government disclaimer of liability |
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| 17 | * ---------------------------------- |
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| 18 | * Neither the United States nor the United States Department of Energy, |
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| 19 | * nor any of their employees, makes any warranty, express or implied, or |
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| 20 | * assumes any legal liability or responsibility for the accuracy, |
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| 21 | * completeness, or usefulness of any data, apparatus, product, or process |
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| 22 | * disclosed, or represents that its use would not infringe privately owned |
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| 23 | * rights. |
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[8a775c27] | 24 | * |
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[8ad6681b] | 25 | * Stanford disclaimer of liability |
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| 26 | * -------------------------------- |
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| 27 | * Stanford University makes no representations or warranties, express or |
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| 28 | * implied, nor assumes any liability for the use of this software. |
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[8a775c27] | 29 | * |
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[8ad6681b] | 30 | * Stanford disclaimer of copyright |
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| 31 | * -------------------------------- |
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| 32 | * Stanford University, owner of the copyright, hereby disclaims its |
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| 33 | * copyright and all other rights in this software. Hence, anyone may |
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[8a775c27] | 34 | * freely use it for any purpose without restriction. |
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| 35 | * |
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[8ad6681b] | 36 | * Maintenance of notices |
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| 37 | * ---------------------- |
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| 38 | * In the interest of clarity regarding the origin and status of this |
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| 39 | * SLAC software, this and all the preceding Stanford University notices |
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| 40 | * are to remain affixed to any copy or derivative of this software made |
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| 41 | * or distributed by the recipient and are to be affixed to any copy of |
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| 42 | * software made or distributed by the recipient that contains a copy or |
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| 43 | * derivative of this software. |
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[8a775c27] | 44 | * |
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[8ad6681b] | 45 | * ------------------ SLAC Software Notices, Set 4 OTT.002a, 2004 FEB 03 |
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[8a775c27] | 46 | * |
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[cbd1e87] | 47 | * Copyright (c) 2009 embedded brains GmbH and others. |
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| 48 | * |
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[8a775c27] | 49 | * embedded brains GmbH |
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| 50 | * Obere Lagerstr. 30 |
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| 51 | * D-82178 Puchheim |
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| 52 | * Germany |
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| 53 | * <rtems@embedded-brains.de> |
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| 54 | * |
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| 55 | * The license and distribution terms for this file may be |
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| 56 | * found in the file LICENSE in this distribution or at |
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| 57 | * http://www.rtems.com/license/LICENSE. |
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| 58 | */ |
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[8ad6681b] | 59 | |
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| 60 | #include <termios.h> |
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| 61 | #include <errno.h> |
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| 62 | #include <stdio.h> |
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| 63 | #include <unistd.h> |
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| 64 | #include <stdlib.h> |
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| 65 | #include <string.h> |
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| 66 | #include <syslog.h> |
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| 67 | |
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[8a775c27] | 68 | #include <rtems/telnetd.h> |
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[8ad6681b] | 69 | |
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[8a775c27] | 70 | #include "passwd.h" |
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[8ad6681b] | 71 | |
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[8a775c27] | 72 | char *__des_crypt_r( const char *, const char *, char *, int); |
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[8ad6681b] | 73 | |
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[8a775c27] | 74 | /** |
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| 75 | * @brief Standard Telnet login check that uses DES to encrypt the passphrase. |
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| 76 | * |
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| 77 | * Takes a @a passphrase, encrypts it and compares it to the encrypted |
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| 78 | * passphrase in the @c TELNETD_PASSWD environment variable. No password is |
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| 79 | * required if @c TELNETD_PASSWD is unset. The argument @a user is ignored. |
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| 80 | */ |
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| 81 | bool rtems_telnetd_login_check( |
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| 82 | const char *user, |
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| 83 | const char *passphrase |
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| 84 | ) |
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[8ad6681b] | 85 | { |
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[8a775c27] | 86 | char *pw = getenv( "TELNETD_PASSWD"); |
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| 87 | char cryptbuf [21]; |
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| 88 | char salt [3]; |
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| 89 | |
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| 90 | if (pw == NULL || strlen( pw) == 0) { |
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| 91 | #ifdef TELNETD_DEFAULT_PASSWD |
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| 92 | pw = TELNETD_DEFAULT_PASSWD; |
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| 93 | #else |
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| 94 | return true; |
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| 95 | #endif |
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[8ad6681b] | 96 | } |
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| 97 | |
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[8a775c27] | 98 | strncpy( salt, pw, 2); |
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| 99 | salt [2] = '\0'; |
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[8ad6681b] | 100 | |
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[8a775c27] | 101 | return strcmp( |
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| 102 | __des_crypt_r( passphrase, salt, cryptbuf, sizeof( cryptbuf)), |
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| 103 | pw |
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| 104 | ) == 0; |
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[8ad6681b] | 105 | } |
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