1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
|
/*
* pw_rand.c --- generate completely random (and hard to remember)
* passwords
*
* Copyright (C) 2001,2002 by Theodore Ts'o
*
* This file may be distributed under the terms of the GNU Public
* License.
*/
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include "pwgen.h"
const char *pw_digits = "0123456789";
const char *pw_uppers = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
const char *pw_lowers = "abcdefghijklmnopqrstuvwxyz";
const char *pw_symbols = "!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~";
const char *pw_ambiguous = "B8G6I1l0OQDS5Z2";
const char *pw_vowels = "01aeiouyAEIOUY";
void pw_rand(char *buf, int size, int pw_flags)
{
char ch, *chars, *wchars;
int i, len, feature_flags;
len = 0;
if (pw_flags & PW_DIGITS) {
len += strlen(pw_digits);
}
if (pw_flags & PW_UPPERS) {
len += strlen(pw_uppers);
}
len += strlen(pw_lowers);
if (pw_flags & PW_SYMBOLS) {
len += strlen(pw_symbols);
}
chars = malloc(len+1);
if (!chars) {
fprintf(stderr, "Couldn't malloc pw_rand buffer.\n");
exit(1);
}
wchars = chars;
if (pw_flags & PW_DIGITS) {
strcpy(wchars, pw_digits);
wchars += strlen(pw_digits);
}
if (pw_flags & PW_UPPERS) {
strcpy(wchars, pw_uppers);
wchars += strlen(pw_uppers);
}
strcpy(wchars, pw_lowers);
wchars += strlen(pw_lowers);
if (pw_flags & PW_SYMBOLS) {
strcpy(wchars, pw_symbols);
}
try_again:
len = strlen(chars);
feature_flags = pw_flags;
i = 0;
while (i < size) {
ch = chars[pw_number(len)];
if ((pw_flags & PW_AMBIGUOUS) && strchr(pw_ambiguous,ch))
continue;
if ((pw_flags & PW_NO_VOWELS) && strchr(pw_vowels, ch))
continue;
buf[i++] = ch;
if (strchr(pw_digits, ch))
feature_flags &= ~PW_DIGITS;
if (strchr(pw_uppers, ch))
feature_flags &= ~PW_UPPERS;
if (strchr(pw_symbols, ch))
feature_flags &= ~PW_SYMBOLS;
}
if (feature_flags & (PW_UPPERS | PW_DIGITS | PW_SYMBOLS))
goto try_again;
buf[size] = 0;
free(chars);
return;
}
|
