Function xcrypt

src/hacklib.c:399–415

trivial text encryption routine (see makedefs) */

/* trivial text encryption routine (see makedefs) */
char *
xcrypt(const char *str, char *buf)
{
    const char *p;
    char *q;
    int bitmask;

    for (bitmask = 1, p = str, q = buf; *p; q++) {
        *q = *p++;
        if (*q & (32 | 64))
            *q ^= bitmask;
        if ((bitmask <<= 1) >= 32)
            bitmask = 1;
    }
    *q = '\0';
    return buf;
}

/* is a string entirely whitespace? */
boolean