1 /* mkpasswd.c - encrypt the given passwd using salt
2 *
3 * Copyright 2013 Ashwini Kumar <ak.ashwini@gmail.com>
4 * Copyright 2013 Kyungwan Han <asura321@gmail.com>
5 *
6 * No Standard
7
8 USE_MKPASSWD(NEWTOY(mkpasswd, ">2S:m:P#=0<0", TOYFLAG_USR|TOYFLAG_BIN))
9
10 config MKPASSWD
11 bool "mkpasswd"
12 default y
13 depends on !TOYBOX_ON_ANDROID
14 help
15 usage: mkpasswd [-P FD] [-m TYPE] [-S SALT] [PASSWORD] [SALT]
16
17 Crypt PASSWORD using crypt(3)
18
19 -P FD Read password from file descriptor FD
20 -m TYPE Encryption method (des, md5, sha256, or sha512; default is des)
21 -S SALT
22 */
23
24 #define FOR_mkpasswd
25 #include "toys.h"
26
GLOBALS(long pfd;char * method;char * salt;)27 GLOBALS(
28 long pfd;
29 char *method;
30 char *salt;
31 )
32
33 void mkpasswd_main(void)
34 {
35 char salt[MAX_SALT_LEN] = {0,};
36 int i;
37
38 if (!TT.method) TT.method = "des";
39 if (toys.optc == 2) {
40 if (TT.salt) error_exit("duplicate salt");
41 TT.salt = toys.optargs[1];
42 }
43
44 if (-1 == (i = get_salt(salt, TT.method))) error_exit("bad -m");
45 if (TT.salt) {
46 char *s = TT.salt;
47
48 // In C locale, isalnum() means [A-Za-Z0-0]
49 while (isalnum(*s) || *s == '.' || *s == '/') s++;
50 if (*s) error_exit("salt not in [./A-Za-z0-9]");
51
52 snprintf(salt+i, sizeof(salt)-i, "%s", TT.salt);
53 }
54
55 // Because read_password() doesn't have an fd argument
56 if (TT.pfd) {
57 if (dup2(TT.pfd, 0) == -1) perror_exit("fd");
58 close(TT.pfd);
59 }
60
61 // If we haven't got a password on the command line, read it from tty or FD
62 if (!*toys.optargs) {
63 // Prompt and read interactively?
64 if (isatty(0)) {
65 if (read_password(toybuf, sizeof(toybuf), "Password: "))
66 perror_exit("password read failed");
67 } else {
68 for (i = 0; i<sizeof(toybuf)-1; i++) {
69 if (!xread(0, toybuf+i, 1)) break;
70 if (toybuf[i] == '\n' || toybuf[i] == '\r') break;
71 }
72 toybuf[i] = 0;
73 }
74 }
75
76 // encrypt & print the password
77 xprintf("%s\n",crypt(*toys.optargs ? *toys.optargs : toybuf, salt));
78 }
79