/* vi: set sw=4 ts=4: */
/*
- * cryptpw.c
+ * cryptpw.c - output a crypt(3)ed password to stdout.
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
*
* Cooked from passwd.c by Thomas Lundquist <thomasez@zelow.no>
+ * mkpasswd compatible options added by Bernhard Reutner-Fischer
+ *
+ * Licensed under GPLv2, see file LICENSE in this source tree.
*/
+//config:config CRYPTPW
+//config: bool "cryptpw (14 kb)"
+//config: default y
+//config: help
+//config: Encrypts the given password with the crypt(3) libc function
+//config: using the given salt.
+//config:
+//config:config MKPASSWD
+//config: bool "mkpasswd (15 kb)"
+//config: default y
+//config: help
+//config: Encrypts the given password with the crypt(3) libc function
+//config: using the given salt. Debian has this utility under mkpasswd
+//config: name. Busybox provides mkpasswd as an alias for cryptpw.
+
+//applet:IF_CRYPTPW( APPLET_NOEXEC(cryptpw, cryptpw, BB_DIR_USR_BIN, BB_SUID_DROP, cryptpw))
+// APPLET_NOEXEC:name main location suid_type help
+//applet:IF_MKPASSWD(APPLET_NOEXEC(mkpasswd, cryptpw, BB_DIR_USR_BIN, BB_SUID_DROP, cryptpw))
+
+//kbuild:lib-$(CONFIG_CRYPTPW) += cryptpw.o
+//kbuild:lib-$(CONFIG_MKPASSWD) += cryptpw.o
+
+//usage:#define cryptpw_trivial_usage
+//usage: "[OPTIONS] [PASSWORD] [SALT]"
+/* We do support -s, we just don't mention it */
+//usage:#define cryptpw_full_usage "\n\n"
+//usage: "Print crypt(3) hashed PASSWORD\n"
+//usage: IF_LONG_OPTS(
+//usage: "\n -P,--password-fd N Read password from fd N"
+/* //usage: "\n -s,--stdin Use stdin; like -P0" */
+//usage: "\n -m,--method TYPE "CRYPT_METHODS_HELP_STR
+//usage: "\n -S,--salt SALT"
+//usage: )
+//usage: IF_NOT_LONG_OPTS(
+//usage: "\n -P N Read password from fd N"
+/* //usage: "\n -s Use stdin; like -P0" */
+//usage: "\n -m TYPE "CRYPT_METHODS_HELP_STR
+//usage: "\n -S SALT"
+//usage: )
#include "libbb.h"
-int cryptpw_main(int argc, char **argv);
-int cryptpw_main(int argc, char **argv)
+/* Debian has 'mkpasswd' utility, manpage says:
+
+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
+ chosen 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
+ $MKPASSWD_OPTIONS
+ A list of options which will be evaluated before the ones
+ specified on the command line.
+BUGS
+ This programs suffers of a bad case of featuritis.
+ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Very true...
+
+cryptpw was in bbox before this gem, so we retain it, and alias mkpasswd
+to cryptpw. -a option (alias for -m) came from cryptpw.
+*/
+
+int cryptpw_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int cryptpw_main(int argc UNUSED_PARAM, char **argv)
{
- char salt[sizeof("$N$XXXXXXXX")];
-
- if (!getopt32(argc, argv, "a:", NULL) || argv[optind - 1][0] != 'd') {
- strcpy(salt, "$1$");
- /* Too ugly, and needs even more magic to handle endianness: */
- //((uint32_t*)&salt)[0] = '$' + '1'*0x100 + '$'*0x10000;
- /* Hope one day gcc will do it itself (inlining strcpy) */
- crypt_make_salt(salt + 3, 4, 0); /* md5 */
- } else {
- crypt_make_salt(salt, 1, 0); /* des */
+ /* Supports: cryptpw -m sha256 PASS 'rounds=999999999$SALT' */
+ char salt[MAX_PW_SALT_LEN + sizeof("rounds=999999999$")];
+ char *salt_ptr;
+ char *password;
+ const char *opt_m, *opt_S;
+ int fd;
+
+#if ENABLE_LONG_OPTS
+ 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"
+ ;
+#endif
+ fd = STDIN_FILENO;
+ opt_m = CONFIG_FEATURE_DEFAULT_PASSWD_ALGO;
+ opt_S = NULL;
+ /* at most two non-option arguments; -P NUM */
+ getopt32long(argv, "^" "sP:+S:m:a:" "\0" "?2",
+ mkpasswd_longopts,
+ &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];
+
+ salt_ptr = crypt_make_pw_salt(salt, opt_m);
+ if (opt_S)
+ /* put user's data after the "$N$" prefix */
+ safe_strncpy(salt_ptr, opt_S, sizeof(salt) - (sizeof("$N$")-1));
+
+ xmove_fd(fd, STDIN_FILENO);
+
+ password = argv[0];
+ if (!password) {
+ /* Only mkpasswd, and only from tty, prompts.
+ * Otherwise it is a plain read. */
+ password = (ENABLE_MKPASSWD && applet_name[0] == 'm' && isatty(STDIN_FILENO))
+ ? bb_ask_noecho_stdin("Password: ")
+ : xmalloc_fgetline(stdin)
+ ;
+ /* may still be NULL on EOF/error */
}
- puts(pw_encrypt(argv[optind] ? argv[optind] : xmalloc_getline(stdin), salt));
+ if (password)
+ puts(pw_encrypt(password, salt, 1));
- return 0;
+ return EXIT_SUCCESS;
}
projects / oweals / busybox.git / blobdiff