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r323: added rough password quality checking in generate_random_str(), so we generate passwords

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that are likely to be accepted by the win2003 quality checks
(This used to be commit 5954969f27)
This commit is contained in:
Andrew Tridgell 2004-04-22 06:17:50 +00:00 committed by Gerald (Jerry) Carter
parent 7e6038ee00
commit ced7fa4b45
1 changed files with 31 additions and 2 deletions
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33
source4/lib/genrand.c
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@ -242,6 +242,27 @@ void generate_random_buffer( unsigned char *out, int len, BOOL do_reseed_now)
}
}
/*
very basic password quality checker
*/
static BOOL check_password_quality(const char *s)
{
int has_digit=0, has_capital=0, has_lower=0;
while (*s) {
if (isdigit(*s)) {
has_digit++;
} else if (isupper(*s)) {
has_capital++;
} else if (islower(*s)) {
has_lower++;
}
s++;
}
return has_digit && has_lower && has_capital;
}
/*******************************************************************
Use the random number generator to generate a random string.
********************************************************************/
@ -257,11 +278,19 @@ char *generate_random_str(size_t len)
if (len > sizeof(retstr)-1)
len = sizeof(retstr) -1;
generate_random_buffer( retstr, len, False);
again:
generate_random_buffer(retstr, len, False);
for (i = 0; i < len; i++)
retstr[i] = c_list[ retstr[i] % (sizeof(c_list)-1) ];
retstr[i] = c_list[retstr[i] % (sizeof(c_list)-1) ];
retstr[i] = '\0';
/* we need to make sure the random string passes basic quality tests
or it might be rejected by windows as a password */
if (len >= 7 && !check_password_quality(retstr)) {
goto again;
}
return (char *)retstr;
}