/*
 *  call-seq:
 *     str.crypt(other_str)   => new_str
 *  
 *  Applies a one-way cryptographic hash to <i>str</i> by invoking the standard
 *  library function <code>crypt</code>. The argument is the salt string, which
 *  should be two characters long, each character drawn from
 *  <code>[a-zA-Z0-9./]</code>.
 */

static VALUE
rb_str_crypt(str, salt)
    VALUE str, salt;
{
    extern char *crypt();
    VALUE result;
    char *s;

    StringValue(salt);
    if (RSTRING(salt)->len < 2)
        rb_raise(rb_eArgError, "salt too short(need >=2 bytes)");

    if (RSTRING(str)->ptr) s = RSTRING(str)->ptr;
    else s = "";
    result = rb_str_new2(crypt(s, RSTRING(salt)->ptr));
    OBJ_INFECT(result, str);
    OBJ_INFECT(result, salt);
    return result;
}