diff options
Diffstat (limited to 'loginutils/cryptpw.c')
| -rw-r--r-- | loginutils/cryptpw.c | 144 |
1 files changed, 90 insertions, 54 deletions
diff --git a/loginutils/cryptpw.c b/loginutils/cryptpw.c index 0c1a9a0..c179e35 100644 --- a/loginutils/cryptpw.c +++ b/loginutils/cryptpw.c @@ -3,75 +3,111 @@ * cryptpw.c * * Cooked from passwd.c by Thomas Lundquist <thomasez@zelow.no> + * mkpasswd compatible options added by Bernhard Reutner-Fischer */ #include "libbb.h" -#define TESTING 0 +/* Debian has 'mkpasswd' utility, manpage says: -/* -set TESTING to 1 and pipe some file through this script -if you played with bbox's crypt implementation. +NAME + mkpasswd - Overfeatured front end to crypt(3) +SYNOPSIS + mkpasswd PASSWORD SALT +... +OPTIONS +-S, --salt=STRING + Use the STRING as salt. It must not contain prefixes such as + $1$. +-R, --rounds=NUMBER + Use NUMBER rounds. This argument is ignored if the method + choosen does not support variable rounds. For the OpenBSD Blowfish + method this is the logarithm of the number of rounds. +-m, --method=TYPE + Compute the password using the TYPE method. If TYPE is 'help' + then the available methods are printed. +-P, --password-fd=NUM + Read the password from file descriptor NUM instead of using getpass(3). + If the file descriptor is not connected to a tty then + no other message than the hashed password is printed on stdout. +-s, --stdin + Like --password-fd=0. +ENVIRONMENT + $MKPASSWD_OPTIONS + A list of options which will be evaluated before the ones + specified on the command line. +BUGS + This programs suffers of a bad case of featuritis. + ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ -while read line; do - n=`./busybox cryptpw -a des -- "$line"` - o=`./busybox_org cryptpw -a des -- "$line"` - test "$n" != "$o" && { - echo n="$n" - echo o="$o" - exit - } - n=`./busybox cryptpw -- "$line"` - o=`./busybox_org cryptpw -- "$line"` - test "$n" != "$o" && { - echo n="$n" - echo o="$o" - exit - } -done - */ +Very true... + +cryptpw was in bbox before this gem, so we retain it, and alias mkpasswd +to cryptpw. -a option (alias for -m) came from cryptpw. +*/ int cryptpw_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; int cryptpw_main(int argc UNUSED_PARAM, char **argv) { - char salt[sizeof("$N$") + 16 + TESTING*100]; - char *opt_a; - int opts; - - opts = getopt32(argv, "a:", &opt_a); + /* $N$ + sha_salt_16_bytes + NUL */ + char salt[3 + 16 + 1]; + char *salt_ptr; + const char *opt_m, *opt_S; + int len; + int fd; - if (opts && opt_a[0] == 'd') { - crypt_make_salt(salt, 2/2, 0); /* des */ -#if TESTING - strcpy(salt, "a."); +#if ENABLE_GETOPT_LONG + static const char mkpasswd_longopts[] ALIGN1 = + "stdin\0" No_argument "s" + "password-fd\0" Required_argument "P" + "salt\0" Required_argument "S" + "method\0" Required_argument "m" + ; + applet_long_options = mkpasswd_longopts; #endif - } else { - salt[0] = '$'; - salt[1] = '1'; - salt[2] = '$'; + fd = STDIN_FILENO; + opt_m = "d"; + opt_S = NULL; + /* at most two non-option arguments; -P NUM */ + opt_complementary = "?2:P+"; + getopt32(argv, "sP:S:m:a:", &fd, &opt_S, &opt_m, &opt_m); + argv += optind; + + /* have no idea how to handle -s... */ + + if (argv[0] && !opt_S) + opt_S = argv[1]; + + len = 2/2; + salt_ptr = salt; + if (opt_m[0] != 'd') { /* not des */ + len = 8/2; /* so far assuming md5 */ + *salt_ptr++ = '$'; + *salt_ptr++ = '1'; + *salt_ptr++ = '$'; #if !ENABLE_USE_BB_CRYPT || ENABLE_USE_BB_CRYPT_SHA - if (opts && opt_a[0] == 's') { - salt[1] = '5' + (strcmp(opt_a, "sha512") == 0); - crypt_make_salt(salt + 3, 16/2, 0); /* sha */ -#if TESTING - strcpy(salt, "$5$rounds=5000$toolongsaltstring"); - // with "This is just a test" as password, should produce: - // "$5$rounds=5000$toolongsaltstrin$Un/5jzAHMgOGZ5.mWJpuVolil07guHPvOW8mGRcvxa5" - strcpy(salt, "$6$rounds=5000$toolongsaltstring"); - // with "This is just a test" as password, should produce: - // "$6$rounds=5000$toolongsaltstrin$lQ8jolhgVRVhY4b5pZKaysCLi0QBxGoNeKQzQ3glMhwllF7oGDZxUhx1yxdYcz/e1JSbq3y6JMxxl8audkUEm0" -#endif - } else -#endif - { - crypt_make_salt(salt + 3, 8/2, 0); /* md5 */ -#if TESTING - strcpy(salt + 3, "ajg./bcf"); -#endif + if (opt_m[0] == 's') { /* sha */ + salt[1] = '5' + (strcmp(opt_m, "sha512") == 0); + len = 16/2; } +#endif } + if (opt_S) + safe_strncpy(salt_ptr, opt_S, sizeof(salt) - 3); + else + crypt_make_salt(salt_ptr, len, 0); + + xmove_fd(fd, STDIN_FILENO); - puts(pw_encrypt(argv[optind] ? argv[optind] : xmalloc_fgetline(stdin), salt, 1)); + puts(pw_encrypt( + argv[0] ? argv[0] : ( + /* Only mkpasswd, and only from tty, prompts. + * Otherwise it is a plain read. */ + (isatty(0) && applet_name[0] == 'm') + ? bb_ask(STDIN_FILENO, 0, "Password: ") + : xmalloc_fgetline(stdin) + ), + salt, 1)); - return 0; + return EXIT_SUCCESS; } |