예제 #1
0
char *NCONF_get_string(const CONF *conf,const char *group,const char *name)
  {
  char *s = _CONF_get_string(conf, group, name);

        /* Since we may get a value from an environment variable even
           if conf is NULL, let's check the value first */
        if (s) return s;

  if (conf == NULL)
    {
    CONFerr(CONF_F_NCONF_GET_STRING,
                        CONF_R_NO_CONF_OR_ENVIRONMENT_VARIABLE);
    return NULL;
    }
  CONFerr(CONF_F_NCONF_GET_STRING,
    CONF_R_NO_VALUE);
  ERR_add_error_data(4,"group=",group," name=",name);
  return NULL;
  }
예제 #2
0
static int str_copy(CONF *conf, char *section, char **pto, char *from)
{
    int q, r, rr = 0, to = 0, len = 0;
    char *s, *e, *rp, *p, *rrp, *np, *cp, v;
    BUF_MEM *buf;

    if ((buf = BUF_MEM_new()) == NULL)
        return 0;

    len = strlen(from) + 1;
    if (!BUF_MEM_grow(buf, len))
        goto err;

    for (;;) {
        if (IS_QUOTE(conf, *from)) {
            q = *from;
            from++;
            while (!IS_EOF(conf, *from) && (*from != q)) {
                if (IS_ESC(conf, *from)) {
                    from++;
                    if (IS_EOF(conf, *from))
                        break;
                }
                buf->data[to++] = *(from++);
            }
            if (*from == q)
                from++;
        } else if (IS_DQUOTE(conf, *from)) {
            q = *from;
            from++;
            while (!IS_EOF(conf, *from)) {
                if (*from == q) {
                    if (*(from + 1) == q) {
                        from++;
                    } else {
                        break;
                    }
                }
                buf->data[to++] = *(from++);
            }
            if (*from == q)
                from++;
        } else if (IS_ESC(conf, *from)) {
            from++;
            v = *(from++);
            if (IS_EOF(conf, v))
                break;
            else if (v == 'r')
                v = '\r';
            else if (v == 'n')
                v = '\n';
            else if (v == 'b')
                v = '\b';
            else if (v == 't')
                v = '\t';
            buf->data[to++] = v;
        } else if (IS_EOF(conf, *from))
            break;
        else if (*from == '$') {
            size_t newsize;

            /* try to expand it */
            rrp = NULL;
            s = &(from[1]);
            if (*s == '{')
                q = '}';
            else if (*s == '(')
                q = ')';
            else
                q = 0;

            if (q)
                s++;
            cp = section;
            e = np = s;
            while (IS_ALNUM(conf, *e))
                e++;
            if ((e[0] == ':') && (e[1] == ':')) {
                cp = np;
                rrp = e;
                rr = *e;
                *rrp = '\0';
                e += 2;
                np = e;
                while (IS_ALNUM(conf, *e))
                    e++;
            }
            r = *e;
            *e = '\0';
            rp = e;
            if (q) {
                if (r != q) {
                    CONFerr(CONF_F_STR_COPY, CONF_R_NO_CLOSE_BRACE);
                    goto err;
                }
                e++;
            }
            /*-
             * So at this point we have
             * np which is the start of the name string which is
             *   '\0' terminated.
             * cp which is the start of the section string which is
             *   '\0' terminated.
             * e is the 'next point after'.
             * r and rr are the chars replaced by the '\0'
             * rp and rrp is where 'r' and 'rr' came from.
             */
            p = _CONF_get_string(conf, cp, np);
            if (rrp != NULL)
                *rrp = rr;
            *rp = r;
            if (p == NULL) {
                CONFerr(CONF_F_STR_COPY, CONF_R_VARIABLE_HAS_NO_VALUE);
                goto err;
            }
            newsize = strlen(p) + buf->length - (e - from);
            if (newsize > MAX_CONF_VALUE_LENGTH) {
                CONFerr(CONF_F_STR_COPY, CONF_R_VARIABLE_EXPANSION_TOO_LONG);
                goto err;
            }
            if (!BUF_MEM_grow_clean(buf, newsize)) {
                CONFerr(CONF_F_STR_COPY, ERR_R_MALLOC_FAILURE);
                goto err;
            }
            while (*p)
                buf->data[to++] = *(p++);

            /*
             * Since we change the pointer 'from', we also have to change the
             * perceived length of the string it points at.  /RL
             */
            len -= e - from;
            from = e;

            /*
             * In case there were no braces or parenthesis around the
             * variable reference, we have to put back the character that was
             * replaced with a '\0'.  /RL
             */
            *rp = r;
        } else
            buf->data[to++] = *(from++);
    }
    buf->data[to] = '\0';
    OPENSSL_free(*pto);
    *pto = buf->data;
    OPENSSL_free(buf);
    return 1;
 err:
    BUF_MEM_free(buf);
    return 0;
}