- add new applet mkpasswd(1)
function old new delta bb_ask - 355 +355 mkpasswd_main - 296 +296 .rodata 121746 121847 +101 packed_usage 24632 24689 +57 static.methods - 21 +21 gmatch 229 248 +19 bb_ask_stdin - 11 +11 applet_names 1949 1958 +9 applet_main 1172 1176 +4 sulogin_main 503 505 +2 applet_nameofs 586 588 +2 sha256_hash 329 327 -2 correct_password 208 206 -2 parse_command 1442 1439 -3 get_cred_or_die 145 141 -4 passwd_main 1054 1044 -10 bb_askpass 348 - -348 ------------------------------------------------------------------------------ (add/remove: 4/1 grow/shrink: 7/5 up/down: 877/-369) Total: 508 bytes
This commit is contained in:
Bernhard Reutner-Fischer
parent
81c3a1d0b2
commit
82b1429966
@ -252,6 +252,7 @@ USE_MKFIFO(APPLET(mkfifo, _BB_DIR_USR_BIN, _BB_SUID_NEVER))
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//USE_MKE2FS(APPLET_ODDNAME(mkfs.ext3, mke2fs, _BB_DIR_SBIN, _BB_SUID_NEVER, mkfs_ext3))
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USE_MKFS_MINIX(APPLET_ODDNAME(mkfs.minix, mkfs_minix, _BB_DIR_SBIN, _BB_SUID_NEVER, mkfs_minix))
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USE_MKNOD(APPLET(mknod, _BB_DIR_BIN, _BB_SUID_NEVER))
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USE_MKPASSWD(APPLET(mkpasswd, _BB_DIR_USR_BIN, _BB_SUID_NEVER))
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USE_MKSWAP(APPLET(mkswap, _BB_DIR_SBIN, _BB_SUID_NEVER))
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USE_MKTEMP(APPLET(mktemp, _BB_DIR_BIN, _BB_SUID_NEVER))
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USE_MODPROBE(APPLET(modprobe, _BB_DIR_SBIN, _BB_SUID_NEVER))
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@ -1021,9 +1021,10 @@ extern int del_loop(const char *device) FAST_FUNC;
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* return value: 1: read-only loopdev was setup, 0: rw, < 0: error */
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extern int set_loop(char **devname, const char *file, unsigned long long offset) FAST_FUNC;
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/* Like bb_ask below, but asks on stdin with no timeout. */
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char *bb_ask_stdin(const char * prompt) FAST_FUNC;
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//TODO: pass buf pointer or return allocated buf (avoid statics)?
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char *bb_askpass(int timeout, const char * prompt) FAST_FUNC;
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char *bb_ask(const int fd, int timeout, const char * prompt) FAST_FUNC;
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int bb_ask_confirmation(void) FAST_FUNC;
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int bb_parse_mode(const char* s, mode_t* theMode) FAST_FUNC;
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@ -2618,6 +2618,21 @@
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"$ mknod /dev/fd0 b 2 0\n" \
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"$ mknod -m 644 /tmp/pipe p\n"
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#define mkpasswd_trivial_usage \
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"[OPTIONS] [PASSWORD]"
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#define mkpasswd_full_usage "\n\n" \
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"Crypts the PASSWORD using crypt(3)\n" \
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"\nOptions:" \
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"\n\t-P"USE_GETOPT_LONG(", --password-fd=")"NUM\tread password from fd NUM" \
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"\n\t-s"USE_GETOPT_LONG(", --stdin")"\t\tuse stdin; like -P0" \
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"\n\t-m"USE_GETOPT_LONG(", --method=")"TYPE\tEncryption method TYPE" \
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"\n\t-S"USE_GETOPT_LONG(", --salt=")"SALT\t\tuse SALT" \
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//"\n\t-l"USE_GETOPT_LONG(", --length=")"LEN\tRandom password with length LEN"
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#define mkpasswd_example_usage \
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"$ mkpasswd -m md5\n" \
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"$ mkpasswd -l 12\n"
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#define mkswap_trivial_usage \
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"DEVICE"
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#define mkswap_full_usage "\n\n" \
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@ -15,7 +15,11 @@ static void askpass_timeout(int UNUSED_PARAM ignore)
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{
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}
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char* FAST_FUNC bb_askpass(int timeout, const char *prompt)
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char* FAST_FUNC bb_ask_stdin(const char *prompt)
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{
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return bb_ask(STDIN_FILENO, 0, prompt);
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}
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char* FAST_FUNC bb_ask(const int fd, int timeout, const char *prompt)
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{
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/* Was static char[BIGNUM] */
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enum { sizeof_passwd = 128 };
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@ -30,8 +34,8 @@ char* FAST_FUNC bb_askpass(int timeout, const char *prompt)
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passwd = xmalloc(sizeof_passwd);
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memset(passwd, 0, sizeof_passwd);
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tcgetattr(STDIN_FILENO, &oldtio);
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tcflush(STDIN_FILENO, TCIFLUSH);
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tcgetattr(fd, &oldtio);
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tcflush(fd, TCIFLUSH);
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tio = oldtio;
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tio.c_iflag &= ~(IUCLC|IXON|IXOFF|IXANY);
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tio.c_lflag &= ~(ECHO|ECHOE|ECHOK|ECHONL|TOSTOP);
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@ -52,7 +56,7 @@ char* FAST_FUNC bb_askpass(int timeout, const char *prompt)
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ret = NULL;
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/* On timeout or Ctrl-C, read will hopefully be interrupted,
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* and we return NULL */
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if (read(STDIN_FILENO, passwd, sizeof_passwd - 1) > 0) {
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if (read(fd, passwd, sizeof_passwd - 1) > 0) {
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ret = passwd;
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i = 0;
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/* Last byte is guaranteed to be 0
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@ -68,7 +68,7 @@ int FAST_FUNC correct_password(const struct passwd *pw)
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return 1;
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fake_it:
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unencrypted = bb_askpass(0, "Password: ");
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unencrypted = bb_ask_stdin("Password: ");
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if (!unencrypted) {
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return 0;
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}
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@ -252,6 +252,13 @@ config CHPASSWD
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standard input and uses this information to update a group of
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existing users.
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config MKPASSWD
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bool "mkpasswd"
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default n
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help
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mkpasswd encrypts the given password with the crypt(3) libc function
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using the given salt.
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config SU
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bool "su"
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default n
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@ -11,6 +11,7 @@ lib-$(CONFIG_CRYPTPW) += cryptpw.o
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lib-$(CONFIG_CHPASSWD) += chpasswd.o
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lib-$(CONFIG_GETTY) += getty.o
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lib-$(CONFIG_LOGIN) += login.o
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lib-$(CONFIG_MKPASSWD) += mkpasswd.o
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lib-$(CONFIG_PASSWD) += passwd.o
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lib-$(CONFIG_SU) += su.o
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lib-$(CONFIG_SULOGIN) += sulogin.o
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71
loginutils/mkpasswd.c
Normal file
71
loginutils/mkpasswd.c
Normal file
@ -0,0 +1,71 @@
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/* vi: set sw=4 ts=4 sts=4: */
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/*
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* mkpasswd - Overfeatured front end to crypt(3)
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* Copyright (c) 2008 Bernhard Reutner-Fischer
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*
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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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*/
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#include "libbb.h"
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int mkpasswd_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int mkpasswd_main(int argc UNUSED_PARAM, char **argv)
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{
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char *chp = NULL, *method = NULL, *salt = NULL;
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char *encrypted;
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int fd = STDIN_FILENO;
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enum {
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OPT_P = (1 << 0),
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OPT_s = (1 << 1),
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OPT_m = (1 << 2),
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OPT_S = (1 << 3)
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};
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static const char methods[] ALIGN1 =
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/*"des\0"*/"md5\0""sha-256\0""sha-512\0";
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enum { TYPE_des, TYPE_md5, TYPE_sha256, TYPE_sha512 };
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unsigned algo = TYPE_des, algobits = 1;
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#if ENABLE_GETOPT_LONG
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static const char mkpasswd_longopts[] ALIGN1 =
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"password-fd\0" Required_argument "P"
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"stdin\0" No_argument "s"
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"method\0" Required_argument "m"
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"salt\0" Required_argument "S"
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;
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applet_long_options = mkpasswd_longopts;
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#endif
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opt_complementary = "?1"; /* at most one non-option argument */
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getopt32(argv, "P:sm:S:", &chp, &method, &salt);
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argv += optind;
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if (option_mask32 & OPT_P)
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fd = xatoi_u(chp);
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if (option_mask32 & OPT_m)
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algo = index_in_strings(methods, method) + 1;
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if (*argv) /* we have a cleartext passwd */
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chp = *argv;
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else
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chp = bb_ask(fd, 0, "Password: ");
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if (!salt)
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salt = xmalloc(128);
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if (algo) {
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char foo[2];
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foo[0] = foo[2] = '$';
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algobits = 4;
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/* MD5 == "$1$", SHA-256 == "$5$", SHA-512 == "$6$" */
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if (algo > 1) {
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algo += 3;
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algobits = 8;
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}
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foo[1] = '0' + (algo);
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strcpy(salt, foo);
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}
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/* The opt_complementary adds a bit of additional noise, which is good
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but not strictly needed. */
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crypt_make_salt(salt + ((!!algo) * 3), algobits, (int)&opt_complementary);
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encrypted = pw_encrypt(chp, salt, 1);
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puts(encrypted);
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if (ENABLE_FEATURE_CLEAN_UP) {
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free(encrypted);
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}
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return EXIT_SUCCESS;
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}
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@ -22,7 +22,7 @@ static char* new_password(const struct passwd *pw, uid_t myuid, int algo)
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if (myuid && pw->pw_passwd[0]) {
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char *encrypted;
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orig = bb_askpass(0, "Old password:"); /* returns ptr to static */
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orig = bb_ask_stdin("Old password:"); /* returns ptr to static */
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if (!orig)
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goto err_ret;
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encrypted = pw_encrypt(orig, pw->pw_passwd, 1); /* returns malloced str */
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@ -35,16 +35,16 @@ static char* new_password(const struct passwd *pw, uid_t myuid, int algo)
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}
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if (ENABLE_FEATURE_CLEAN_UP) free(encrypted);
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}
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orig = xstrdup(orig); /* or else bb_askpass() will destroy it */
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newp = bb_askpass(0, "New password:"); /* returns ptr to static */
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orig = xstrdup(orig); /* or else bb_ask_stdin() will destroy it */
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newp = bb_ask_stdin("New password:"); /* returns ptr to static */
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if (!newp)
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goto err_ret;
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newp = xstrdup(newp); /* we are going to bb_askpass() again, so save it */
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newp = xstrdup(newp); /* we are going to bb_ask_stdin() again, so save it */
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if (ENABLE_FEATURE_PASSWD_WEAK_CHECK
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&& obscure(orig, newp, pw) && myuid)
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goto err_ret; /* non-root is not allowed to have weak passwd */
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cp = bb_askpass(0, "Retype password:");
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cp = bb_ask_stdin("Retype password:");
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if (!cp)
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goto err_ret;
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if (strcmp(cp, newp)) {
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@ -51,7 +51,7 @@ int sulogin_main(int argc UNUSED_PARAM, char **argv)
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/* Clear dangerous stuff, set PATH */
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sanitize_env_if_suid();
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// bb_askpass() already handles this
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// bb_ask() already handles this
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// signal(SIGALRM, catchalarm);
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pwd = getpwuid(0);
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@ -77,7 +77,7 @@ int sulogin_main(int argc UNUSED_PARAM, char **argv)
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int r;
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/* cp points to a static buffer that is zeroed every time */
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cp = bb_askpass(timeout,
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cp = bb_ask(STDIN_FILENO, timeout,
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"Give root password for system maintenance\n"
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"(or type Control-D for normal startup):");
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@ -228,8 +228,8 @@ void FAST_FUNC get_cred_or_die(int fd)
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{
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// either from TTY
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if (isatty(fd)) {
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G.user = xstrdup(bb_askpass(0, "User: "));
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G.pass = xstrdup(bb_askpass(0, "Password: "));
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G.user = xstrdup(bb_ask_stdin("User: "));
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G.pass = xstrdup(bb_ask_stdin("Password: "));
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// or from STDIN
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} else {
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FILE *fp = fdopen(fd, "r");
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