Mercurial > hg > toybox
comparison toys/other/mkpasswd.c @ 1367:def326708e49 draft
Promote mkpasswd from pending to other.
author | Rob Landley <rob@landley.net> |
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date | Sat, 28 Jun 2014 20:02:57 -0500 |
parents | toys/pending/mkpasswd.c@e65f9a9ba62d |
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1366:4cf313dbd885 | 1367:def326708e49 |
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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 help | |
14 usage: mkpasswd [-P FD] [-m TYPE] [-S SALT] [PASSWORD] [SALT] | |
15 | |
16 Crypt PASSWORD using crypt(3) | |
17 | |
18 -P FD Read password from file descriptor FD | |
19 -m TYPE Encryption method (des, md5, sha256, or sha512; default is des) | |
20 -S SALT | |
21 */ | |
22 | |
23 #define FOR_mkpasswd | |
24 #include "toys.h" | |
25 | |
26 GLOBALS( | |
27 long pfd; | |
28 char *method; | |
29 char *salt; | |
30 ) | |
31 | |
32 void mkpasswd_main(void) | |
33 { | |
34 char salt[MAX_SALT_LEN] = {0,}; | |
35 int i; | |
36 | |
37 if (!TT.method) TT.method = "des"; | |
38 if (toys.optc == 2) { | |
39 if (TT.salt) error_exit("duplicate salt"); | |
40 TT.salt = toys.optargs[1]; | |
41 } | |
42 | |
43 if (-1 == (i = get_salt(salt, TT.method))) error_exit("bad -m"); | |
44 if (TT.salt) { | |
45 char *s = TT.salt; | |
46 | |
47 // In C locale, isalnum() means [A-Za-Z0-0] | |
48 while (isalnum(*s) || *s == '.' || *s == '/') s++; | |
49 if (*s) error_exit("salt not in [./A-Za-z0-9]"); | |
50 | |
51 snprintf(salt+i, sizeof(salt)-i, "%s", TT.salt); | |
52 } | |
53 | |
54 // Because read_password() doesn't have an fd argument | |
55 if (TT.pfd) { | |
56 if (dup2(TT.pfd, 0) == -1) perror_exit("fd"); | |
57 close(TT.pfd); | |
58 } | |
59 | |
60 // If we haven't got a password on the command line, read it from tty or FD | |
61 if (!*toys.optargs) { | |
62 // Prompt and read interactively? | |
63 if (isatty(0)) { | |
64 if (read_password(toybuf, sizeof(toybuf), "Password: ")) | |
65 perror_exit("password read failed"); | |
66 } else { | |
67 for (i = 0; i<sizeof(toybuf)-1; i++) { | |
68 if (!xread(0, toybuf+i, 1)) break; | |
69 if (toybuf[i] == '\n' || toybuf[i] == '\r') break; | |
70 } | |
71 toybuf[i] = 0; | |
72 } | |
73 } | |
74 | |
75 // encrypt & print the password | |
76 xprintf("%s\n",crypt(*toys.optargs ? *toys.optargs : toybuf, salt)); | |
77 } |