Cómo programar un generador de contraseñas en lenguaje C

//const?char?upper_chars[]?=?"ABCDEFGHIJKLMNOPQRSTUVWXYZ";

//const ?char? number_chars[]?=?"0123456789";?

const?char?lower_chars[]?=?"abcdefghijkmnpqrstuvwxyz";?//?no?l?or?o

const?char?upper_chars[]?=?"ABCDEFGHJKLMNPQRSTUVWXYZ";?//?no?I?or?O

const?char?number_chars[]?=?"23456789";? // no?1?o?0

const?char?special_chars[]?=?"!@#$%^&*()-=_+[]{};:'\ "<> ,.?/";

const?int?_ks_pass_len?=?17;

void?mkpass(char?pass[_ks_pass_len+1])

{

int?i?=?0,?j?=?0,?k?=?0,n?=?0;

n?=? _ks_pass_len/4 ;

para?(;?i?

{

pasar[i]?=?lower_chars[rand ()% (strlen(lower_chars))];

pasar[i+n]?=?upper_chars[rand()%(strlen(upper_chars))];

pasar[ i+2 *n]?=?number_chars[rand()%(strlen(number_chars))];

pasar[i+3*n]?=?special_chars[rand()%(strlen( caracteres_especiales)) ];

}

j?=?_ks_pass_len?-?4*n;

para?(i?=?0;?i

pasar[i+4*n]?=?special_chars[rand()%(strlen(special_chars))];

}

//Caracteres fuera de orden

for?(i?=?0;?i?

{?

j?=?rand()%(_ks_pass_len);

k?=?pasar[j];

pasar[j]? =?pasar[ i%_ks_pass_len];

pasar[i%_ks_pass_len]?=?k;

}

pasar[_ks_pass_len]?=?' \0';

}

int?_tmain(int?argc,?_TCHAR*?argv[])

{

srand(tiempo( 0));

char?szPass[_ks_pass_len+1];

para?(en

t?i=0;?i<16;?i++)

{

mkpass(szPass);

printf("%s\n", szPass);

}

retorno?0;

}