Mercurial > hg > toybox
annotate toys/pending/mkpasswd.c @ 1363:e65f9a9ba62d draft
Cleanup pass on mkpasswd.c
author | Rob Landley <rob@landley.net> |
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date | Wed, 25 Jun 2014 22:54:59 -0500 |
parents | 63db77909fc8 |
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rev | line source |
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useradd, groupadd, and mkpasswd submitted by Ashwini Sharma.
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1 /* mkpasswd.c - encrypt the given passwd using salt |
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2 * |
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3 * Copyright 2013 Ashwini Kumar <ak.ashwini@gmail.com> |
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4 * Copyright 2013 Kyungwan Han <asura321@gmail.com> |
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5 * |
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6 * No Standard |
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7 |
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8 USE_MKPASSWD(NEWTOY(mkpasswd, ">2S:m:P#=0<0", TOYFLAG_USR|TOYFLAG_BIN)) |
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9 |
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10 config MKPASSWD |
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11 bool "mkpasswd" |
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12 default n |
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13 help |
1363 | 14 usage: mkpasswd [-P FD] [-m TYPE] [-S SALT] [PASSWORD] [SALT] |
1091
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useradd, groupadd, and mkpasswd submitted by Ashwini Sharma.
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15 |
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16 Crypt PASSWORD using crypt(3) |
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17 |
1363 | 18 -P FD Read password from file descriptor FD |
19 -m TYPE Encryption method (des, md5, sha256, or sha512; default is des) | |
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20 -S SALT |
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21 */ |
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22 |
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23 #define FOR_mkpasswd |
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24 #include "toys.h" |
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25 |
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26 GLOBALS( |
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27 long pfd; |
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28 char *method; |
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29 char *salt; |
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30 ) |
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31 |
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32 void mkpasswd_main(void) |
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33 { |
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34 char salt[MAX_SALT_LEN] = {0,}; |
1363 | 35 int i; |
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36 |
1363 | 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]; | |
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41 } |
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42 |
1363 | 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"); | |
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useradd, groupadd, and mkpasswd submitted by Ashwini Sharma.
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57 close(TT.pfd); |
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Rob Landley <rob@landley.net>
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58 } |
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59 |
1363 | 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)) { | |
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useradd, groupadd, and mkpasswd submitted by Ashwini Sharma.
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64 if (read_password(toybuf, sizeof(toybuf), "Password: ")) |
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65 perror_exit("password read failed"); |
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66 } else { |
1363 | 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; | |
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70 } |
1363 | 71 toybuf[i] = 0; |
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72 } |
1363 | 73 } |
1091
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useradd, groupadd, and mkpasswd submitted by Ashwini Sharma.
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74 |
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75 // encrypt & print the password |
1363 | 76 xprintf("%s\n",crypt(*toys.optargs ? *toys.optargs : toybuf, salt)); |
1091
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77 } |