| 1 | #
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| 2 | # For a description of the syntax of this configuration file,
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| 3 | # see scripts/kbuild/config-language.txt.
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| 4 | #
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| 5 |
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| 6 | menu "Login/Password Management Utilities"
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| 7 |
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| 8 | INSERT
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| 9 |
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| 10 | config FEATURE_SHADOWPASSWDS
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| 11 | bool "Support for shadow passwords"
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| 12 | default y
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| 13 | help
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| 14 | Build support for shadow password in /etc/shadow. This file is only
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| 15 | readable by root and thus the encrypted passwords are no longer
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| 16 | publicly readable.
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| 17 |
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| 18 | config USE_BB_PWD_GRP
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| 19 | bool "Use internal password and group functions rather than system functions"
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| 20 | default y
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| 21 | help
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| 22 | If you leave this disabled, busybox will use the system's password
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| 23 | and group functions. And if you are using the GNU C library
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| 24 | (glibc), you will then need to install the /etc/nsswitch.conf
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| 25 | configuration file and the required /lib/libnss_* libraries in
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| 26 | order for the password and group functions to work. This generally
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| 27 | makes your embedded system quite a bit larger.
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| 28 |
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| 29 | Enabling this option will cause busybox to directly access the
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| 30 | system's /etc/password, /etc/group files (and your system will be
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| 31 | smaller, and I will get fewer emails asking about how glibc NSS
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| 32 | works). When this option is enabled, you will not be able to use
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| 33 | PAM to access remote LDAP password servers and whatnot. And if you
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| 34 | want hostname resolution to work with glibc, you still need the
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| 35 | /lib/libnss_* libraries.
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| 36 |
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| 37 | If you need to use glibc's nsswitch.conf mechanism
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| 38 | (e.g. if user/group database is NOT stored in /etc/passwd etc),
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| 39 | you must NOT use this option.
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| 40 |
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| 41 | If you enable this option, it will add about 1.5k.
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| 42 |
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| 43 | config USE_BB_SHADOW
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| 44 | bool "Use internal shadow password functions"
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| 45 | default y
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| 46 | depends on USE_BB_PWD_GRP && FEATURE_SHADOWPASSWDS
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| 47 | help
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| 48 | If you leave this disabled, busybox will use the system's shadow
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| 49 | password handling functions. And if you are using the GNU C library
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| 50 | (glibc), you will then need to install the /etc/nsswitch.conf
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| 51 | configuration file and the required /lib/libnss_* libraries in
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| 52 | order for the shadow password functions to work. This generally
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| 53 | makes your embedded system quite a bit larger.
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| 54 |
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| 55 | Enabling this option will cause busybox to directly access the
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| 56 | system's /etc/shadow file when handling shadow passwords. This
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| 57 | makes your system smaller (and I will get fewer emails asking about
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| 58 | how glibc NSS works). When this option is enabled, you will not be
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| 59 | able to use PAM to access shadow passwords from remote LDAP
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| 60 | password servers and whatnot.
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| 61 |
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| 62 | config USE_BB_CRYPT
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| 63 | bool "Use internal crypt functions"
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| 64 | default y
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| 65 | help
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| 66 | Busybox has internal DES and MD5 crypt functions.
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| 67 | They produce results which are identical to corresponding
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| 68 | standard C library functions.
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| 69 |
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| 70 | If you leave this disabled, busybox will use the system's
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| 71 | crypt functions. Most C libraries use large (~70k)
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| 72 | static buffers there, and also combine them with more general
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| 73 | DES encryption/decryption.
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| 74 |
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| 75 | For busybox, having large static buffers is undesirable,
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| 76 | especially on NOMMU machines. Busybox also doesn't need
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| 77 | DES encryption/decryption and can do with smaller code.
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| 78 |
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| 79 | If you enable this option, it will add about 4.8k of code
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| 80 | if you are building dynamically linked executable.
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| 81 | In static build, it makes code _smaller_ by about 1.2k,
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| 82 | and likely many kilobytes less of bss.
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| 83 |
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| 84 | config USE_BB_CRYPT_SHA
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| 85 | bool "Enable SHA256/512 crypt functions"
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| 86 | default y
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| 87 | depends on USE_BB_CRYPT
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| 88 | help
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| 89 | Enable this if you have passwords starting with "$5$" or "$6$"
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| 90 | in your /etc/passwd or /etc/shadow files. These passwords
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| 91 | are hashed using SHA256 and SHA512 algorithms. Support for them
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| 92 | was added to glibc in 2008.
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| 93 | With this option off, login will fail password check for any
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| 94 | user which has password encrypted with these algorithms.
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| 95 |
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| 96 | config ADDUSER
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| 97 | bool "adduser"
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| 98 | default y
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| 99 | help
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| 100 | Utility for creating a new user account.
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| 101 |
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| 102 | config FEATURE_ADDUSER_LONG_OPTIONS
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| 103 | bool "Enable long options"
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| 104 | default y
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| 105 | depends on ADDUSER && LONG_OPTS
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| 106 | help
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| 107 | Support long options for the adduser applet.
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| 108 |
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| 109 | config FEATURE_CHECK_NAMES
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| 110 | bool "Enable sanity check on user/group names in adduser and addgroup"
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| 111 | default n
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| 112 | depends on ADDUSER || ADDGROUP
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| 113 | help
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| 114 | Enable sanity check on user and group names in adduser and addgroup.
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| 115 | To avoid problems, the user or group name should consist only of
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| 116 | letters, digits, underscores, periods, at signs and dashes,
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| 117 | and not start with a dash (as defined by IEEE Std 1003.1-2001).
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| 118 | For compatibility with Samba machine accounts "$" is also supported
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| 119 | at the end of the user or group name.
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| 120 |
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| 121 | config FIRST_SYSTEM_ID
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| 122 | int "First valid system uid or gid for adduser and addgroup"
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| 123 | depends on ADDUSER || ADDGROUP
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| 124 | range 0 64900
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| 125 | default 100
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| 126 | help
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| 127 | First valid system uid or gid for adduser and addgroup
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| 128 |
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| 129 | config LAST_SYSTEM_ID
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| 130 | int "Last valid system uid or gid for adduser and addgroup"
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| 131 | depends on ADDUSER || ADDGROUP
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| 132 | range 0 64900
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| 133 | default 999
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| 134 | help
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| 135 | Last valid system uid or gid for adduser and addgroup
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| 136 |
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| 137 | config ADDGROUP
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| 138 | bool "addgroup"
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| 139 | default y
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| 140 | help
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| 141 | Utility for creating a new group account.
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| 142 |
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| 143 | config FEATURE_ADDGROUP_LONG_OPTIONS
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| 144 | bool "Enable long options"
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| 145 | default y
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| 146 | depends on ADDGROUP && LONG_OPTS
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| 147 | help
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| 148 | Support long options for the addgroup applet.
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| 149 |
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| 150 | config FEATURE_ADDUSER_TO_GROUP
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| 151 | bool "Support for adding users to groups"
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| 152 | default y
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| 153 | depends on ADDGROUP
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| 154 | help
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| 155 | If called with two non-option arguments,
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| 156 | addgroup will add an existing user to an
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| 157 | existing group.
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| 158 |
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| 159 | config DELUSER
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| 160 | bool "deluser"
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| 161 | default y
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| 162 | help
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| 163 | Utility for deleting a user account.
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| 164 |
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| 165 | config DELGROUP
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| 166 | bool "delgroup"
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| 167 | default y
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| 168 | help
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| 169 | Utility for deleting a group account.
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| 170 |
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| 171 | config FEATURE_DEL_USER_FROM_GROUP
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| 172 | bool "Support for removing users from groups"
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| 173 | default y
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| 174 | depends on DELGROUP
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| 175 | help
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| 176 | If called with two non-option arguments, deluser
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| 177 | or delgroup will remove an user from a specified group.
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| 178 |
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| 179 | config GETTY
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| 180 | bool "getty"
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| 181 | default y
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| 182 | select FEATURE_SYSLOG
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| 183 | help
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| 184 | getty lets you log in on a tty. It is normally invoked by init.
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| 185 |
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| 186 | Note that you can save a few bytes by disabling it and
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| 187 | using login applet directly.
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| 188 | If you need to reset tty attributes before calling login,
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| 189 | this script approximates getty:
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| 190 |
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| 191 | exec </dev/$1 >/dev/$1 2>&1 || exit 1
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| 192 | reset
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| 193 | stty sane; stty ispeed 38400; stty ospeed 38400
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| 194 | printf "%s login: " "`hostname`"
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| 195 | read -r login
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| 196 | exec /bin/login "$login"
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| 197 |
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| 198 | config LOGIN
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| 199 | bool "login"
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| 200 | default y
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| 201 | select FEATURE_SYSLOG
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| 202 | help
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| 203 | login is used when signing onto a system.
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| 204 |
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| 205 | Note that Busybox binary must be setuid root for this applet to
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| 206 | work properly.
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| 207 |
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| 208 | config LOGIN_SESSION_AS_CHILD
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| 209 | bool "Run logged in session in a child process"
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| 210 | default y if PAM
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| 211 | depends on LOGIN
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| 212 | help
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| 213 | Run the logged in session in a child process. This allows
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| 214 | login to clean up things such as utmp entries or PAM sessions
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| 215 | when the login session is complete. If you use PAM, you
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| 216 | almost always would want this to be set to Y, else PAM session
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| 217 | will not be cleaned up.
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| 218 |
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| 219 | config PAM
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| 220 | bool "Support for PAM (Pluggable Authentication Modules)"
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| 221 | default n
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| 222 | depends on LOGIN
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| 223 | help
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| 224 | Use PAM in login(1) instead of direct access to password database.
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| 225 |
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| 226 | config LOGIN_SCRIPTS
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| 227 | bool "Support for login scripts"
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| 228 | depends on LOGIN
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| 229 | default y
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| 230 | help
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| 231 | Enable this if you want login to execute $LOGIN_PRE_SUID_SCRIPT
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| 232 | just prior to switching from root to logged-in user.
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| 233 |
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| 234 | config FEATURE_NOLOGIN
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| 235 | bool "Support for /etc/nologin"
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| 236 | default y
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| 237 | depends on LOGIN
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| 238 | help
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| 239 | The file /etc/nologin is used by (some versions of) login(1).
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| 240 | If it exists, non-root logins are prohibited.
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| 241 |
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| 242 | config FEATURE_SECURETTY
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| 243 | bool "Support for /etc/securetty"
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| 244 | default y
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| 245 | depends on LOGIN
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| 246 | help
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| 247 | The file /etc/securetty is used by (some versions of) login(1).
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| 248 | The file contains the device names of tty lines (one per line,
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| 249 | without leading /dev/) on which root is allowed to login.
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| 250 |
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| 251 | config PASSWD
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| 252 | bool "passwd"
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| 253 | default y
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| 254 | select FEATURE_SYSLOG
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| 255 | help
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| 256 | passwd changes passwords for user and group accounts. A normal user
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| 257 | may only change the password for his/her own account, the super user
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| 258 | may change the password for any account. The administrator of a group
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| 259 | may change the password for the group.
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| 260 |
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| 261 | Note that Busybox binary must be setuid root for this applet to
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| 262 | work properly.
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| 263 |
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| 264 | config FEATURE_PASSWD_WEAK_CHECK
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| 265 | bool "Check new passwords for weakness"
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| 266 | default y
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| 267 | depends on PASSWD
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| 268 | help
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| 269 | With this option passwd will refuse new passwords which are "weak".
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| 270 |
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| 271 | config CRYPTPW
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| 272 | bool "cryptpw"
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| 273 | default y
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| 274 | help
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| 275 | Encrypts the given password with the crypt(3) libc function
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| 276 | using the given salt. Debian has this utility under mkpasswd
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| 277 | name. Busybox provides mkpasswd as an alias for cryptpw.
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| 278 |
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| 279 | config CHPASSWD
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| 280 | bool "chpasswd"
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| 281 | default y
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| 282 | help
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| 283 | Reads a file of user name and password pairs from standard input
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| 284 | and uses this information to update a group of existing users.
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| 285 |
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| 286 | config FEATURE_DEFAULT_PASSWD_ALGO
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| 287 | string "Default password encryption method (passwd -a, cryptpw -m parameter)"
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| 288 | default "des"
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| 289 | depends on PASSWD || CRYPTPW
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| 290 | help
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| 291 | Possible choices are "d[es]", "m[d5]", "s[ha256]" or "sha512".
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| 292 |
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| 293 | config SU
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| 294 | bool "su"
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| 295 | default y
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| 296 | select FEATURE_SYSLOG
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| 297 | help
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| 298 | su is used to become another user during a login session.
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| 299 | Invoked without a username, su defaults to becoming the super user.
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| 300 |
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| 301 | Note that Busybox binary must be setuid root for this applet to
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| 302 | work properly.
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| 303 |
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| 304 | config FEATURE_SU_SYSLOG
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| 305 | bool "Enable su to write to syslog"
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| 306 | default y
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| 307 | depends on SU
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| 308 |
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| 309 | config FEATURE_SU_CHECKS_SHELLS
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| 310 | bool "Enable su to check user's shell to be listed in /etc/shells"
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| 311 | depends on SU
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| 312 | default y
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| 313 |
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| 314 | config SULOGIN
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| 315 | bool "sulogin"
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| 316 | default y
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| 317 | select FEATURE_SYSLOG
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| 318 | help
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| 319 | sulogin is invoked when the system goes into single user
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| 320 | mode (this is done through an entry in inittab).
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| 321 |
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| 322 | config VLOCK
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| 323 | bool "vlock"
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| 324 | default y
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| 325 | help
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| 326 | Build the "vlock" applet which allows you to lock (virtual) terminals.
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| 327 |
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| 328 | Note that Busybox binary must be setuid root for this applet to
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| 329 | work properly.
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| 330 |
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| 331 | endmenu
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