LWS_VISIBLE int
lws_callback_http_dummy(struct lws *wsi, enum lws_callback_reasons reason,
void *user, void *in, size_t len)
{
struct lws_ssl_info *si;
#ifdef LWS_WITH_CGI
struct lws_cgi_args *args;
#endif
#if defined(LWS_WITH_CGI) || defined(LWS_WITH_HTTP_PROXY)
char buf[8192];
int n;
#endif
#if defined(LWS_WITH_HTTP_PROXY)
unsigned char **p, *end;
struct lws *parent;
#endif
switch (reason) {
#if defined(LWS_ROLE_H1) || defined(LWS_ROLE_H2)
case LWS_CALLBACK_HTTP:
#ifndef LWS_NO_SERVER
if (lws_return_http_status(wsi, HTTP_STATUS_NOT_FOUND, NULL))
return -1;
if (lws_http_transaction_completed(wsi))
#endif
return -1;
break;
#if !defined(LWS_NO_SERVER)
case LWS_CALLBACK_HTTP_BODY_COMPLETION:
case LWS_CALLBACK_HTTP_FILE_COMPLETION:
if (lws_http_transaction_completed(wsi))
return -1;
break;
#endif
case LWS_CALLBACK_HTTP_WRITEABLE:
#ifdef LWS_WITH_CGI
if (wsi->reason_bf & (LWS_CB_REASON_AUX_BF__CGI_HEADERS |
LWS_CB_REASON_AUX_BF__CGI)) {
n = lws_cgi_write_split_stdout_headers(wsi);
if (n < 0) {
lwsl_debug("AUX_BF__CGI forcing close\n");
return -1;
}
if (!n)
lws_rx_flow_control(
wsi->http.cgi->stdwsi[LWS_STDOUT], 1);
if (wsi->reason_bf & LWS_CB_REASON_AUX_BF__CGI_HEADERS)
wsi->reason_bf &=
~LWS_CB_REASON_AUX_BF__CGI_HEADERS;
else
wsi->reason_bf &= ~LWS_CB_REASON_AUX_BF__CGI;
if (wsi->http.cgi && wsi->http.cgi->cgi_transaction_over)
return -1;
break;
}
if (wsi->reason_bf & LWS_CB_REASON_AUX_BF__CGI_CHUNK_END) {
if (!wsi->http2_substream) {
memcpy(buf + LWS_PRE, "0\x0d\x0a\x0d\x0a", 5);
lwsl_debug("writing chunk term and exiting\n");
n = lws_write(wsi, (unsigned char *)buf +
LWS_PRE, 5, LWS_WRITE_HTTP);
} else
n = lws_write(wsi, (unsigned char *)buf +
LWS_PRE, 0,
LWS_WRITE_HTTP_FINAL);
/* always close after sending it */
return -1;
}
#endif
#if defined(LWS_WITH_HTTP_PROXY)
if (wsi->reason_bf & LWS_CB_REASON_AUX_BF__PROXY_HEADERS) {
wsi->reason_bf &= ~LWS_CB_REASON_AUX_BF__PROXY_HEADERS;
lwsl_debug("%s: %p: issuing proxy headers\n",
__func__, wsi);
n = lws_write(wsi, wsi->http.pending_return_headers +
LWS_PRE,
wsi->http.pending_return_headers_len,
LWS_WRITE_HTTP_HEADERS);
lws_free_set_NULL(wsi->http.pending_return_headers);
if (n < 0) {
lwsl_err("%s: EST_CLIENT_HTTP: write failed\n",
__func__);
return -1;
}
lws_callback_on_writable(wsi);
break;
}
if (wsi->reason_bf & LWS_CB_REASON_AUX_BF__PROXY) {
char *px = buf + LWS_PRE;
int lenx = sizeof(buf) - LWS_PRE - 32;
/*
* our sink is writeable and our source has something
* to read. So read a lump of source material of
* suitable size to send or what's available, whichever
* is the smaller.
*/
wsi->reason_bf &= ~LWS_CB_REASON_AUX_BF__PROXY;
if (!lws_get_child(wsi))
break;
/* this causes LWS_CALLBACK_RECEIVE_CLIENT_HTTP_READ */
if (lws_http_client_read(lws_get_child(wsi), &px,
&lenx) < 0) {
lwsl_info("%s: LWS_CB_REASON_AUX_BF__PROXY: "
"client closed\n", __func__);
stream_close(wsi);
return -1;
}
break;
}
if (wsi->reason_bf & LWS_CB_REASON_AUX_BF__PROXY_TRANS_END) {
lwsl_info("%s: LWS_CB_REASON_AUX_BF__PROXY_TRANS_END\n",
__func__);
wsi->reason_bf &= ~LWS_CB_REASON_AUX_BF__PROXY_TRANS_END;
if (stream_close(wsi))
return -1;
if (lws_http_transaction_completed(wsi))
return -1;
}
#endif
break;
#if defined(LWS_WITH_HTTP_PROXY)
case LWS_CALLBACK_RECEIVE_CLIENT_HTTP:
assert(lws_get_parent(wsi));
if (!lws_get_parent(wsi))
break;
lws_get_parent(wsi)->reason_bf |= LWS_CB_REASON_AUX_BF__PROXY;
lws_callback_on_writable(lws_get_parent(wsi));
break;
case LWS_CALLBACK_RECEIVE_CLIENT_HTTP_READ: {
char *out = buf + LWS_PRE;
assert(lws_get_parent(wsi));
if (wsi->http.proxy_parent_chunked) {
if (len > sizeof(buf) - LWS_PRE - 16) {
lwsl_err("oversize buf %d %d\n", (int)len,
(int)sizeof(buf) - LWS_PRE - 16);
return -1;
}
/*
* this only needs dealing with on http/1.1 to allow
* pipelining
*/
n = lws_snprintf(out, 14, "%X\x0d\x0a", (int)len);
out += n;
memcpy(out, in, len);
out += len;
*out++ = '\x0d';
*out++ = '\x0a';
n = lws_write(lws_get_parent(wsi),
(unsigned char *)buf + LWS_PRE,
len + n + 2, LWS_WRITE_HTTP);
} else
n = lws_write(lws_get_parent(wsi), (unsigned char *)in,
len, LWS_WRITE_HTTP);
if (n < 0)
return -1;
break; }
/* this handles the proxy case... */
case LWS_CALLBACK_ESTABLISHED_CLIENT_HTTP: {
unsigned char *start, *p, *end;
/*
* We want to proxy these headers, but we are being called
* at the point the onward client was established, which is
* unrelated to the state or writability of our proxy
* connection.
*
* Therefore produce the headers using the onward client ah
* while we have it, and stick them on the output buflist to be
* written on the proxy connection as soon as convenient.
*/
parent = lws_get_parent(wsi);
if (!parent)
return 0;
start = p = (unsigned char *)buf + LWS_PRE;
end = p + sizeof(buf) - LWS_PRE - 256;
if (lws_add_http_header_status(lws_get_parent(wsi),
lws_http_client_http_response(wsi), &p, end))
return 1;
/*
* copy these headers from the client connection to the parent
*/
proxy_header(parent, wsi, end, 256,
WSI_TOKEN_HTTP_CONTENT_LENGTH, &p, end);
proxy_header(parent, wsi, end, 256,
WSI_TOKEN_HTTP_CONTENT_TYPE, &p, end);
proxy_header(parent, wsi, end, 256,
WSI_TOKEN_HTTP_ETAG, &p, end);
proxy_header(parent, wsi, end, 256,
WSI_TOKEN_HTTP_ACCEPT_LANGUAGE, &p, end);
proxy_header(parent, wsi, end, 256,
WSI_TOKEN_HTTP_CONTENT_ENCODING, &p, end);
proxy_header(parent, wsi, end, 256,
WSI_TOKEN_HTTP_CACHE_CONTROL, &p, end);
if (!parent->http2_substream)
if (lws_add_http_header_by_token(parent,
WSI_TOKEN_CONNECTION, (unsigned char *)"close",
5, &p, end))
return -1;
/*
* We proxy using h1 only atm, and strip any chunking so it
* can go back out on h2 just fine.
*
* However if we are actually going out on h1, we need to add
* our own chunking since we still don't know the size.
*/
if (!parent->http2_substream &&
!lws_hdr_total_length(wsi, WSI_TOKEN_HTTP_CONTENT_LENGTH)) {
lwsl_debug("downstream parent chunked\n");
if (lws_add_http_header_by_token(parent,
WSI_TOKEN_HTTP_TRANSFER_ENCODING,
(unsigned char *)"chunked", 7, &p, end))
return -1;
wsi->http.proxy_parent_chunked = 1;
}
if (lws_finalize_http_header(parent, &p, end))
return 1;
parent->http.pending_return_headers_len =
lws_ptr_diff(p, start);
parent->http.pending_return_headers =
lws_malloc(parent->http.pending_return_headers_len +
LWS_PRE, "return proxy headers");
if (!parent->http.pending_return_headers)
return -1;
memcpy(parent->http.pending_return_headers + LWS_PRE, start,
parent->http.pending_return_headers_len);
parent->reason_bf |= LWS_CB_REASON_AUX_BF__PROXY_HEADERS;
lwsl_debug("%s: LWS_CALLBACK_ESTABLISHED_CLIENT_HTTP: "
"prepared headers\n", __func__);
lws_callback_on_writable(parent);
break; }
case LWS_CALLBACK_COMPLETED_CLIENT_HTTP:
lwsl_info("%s: COMPLETED_CLIENT_HTTP: %p (parent %p)\n",
__func__, wsi, lws_get_parent(wsi));
if (!lws_get_parent(wsi))
break;
lws_get_parent(wsi)->reason_bf |=
LWS_CB_REASON_AUX_BF__PROXY_TRANS_END;
lws_callback_on_writable(lws_get_parent(wsi));
break;
case LWS_CALLBACK_CLOSED_CLIENT_HTTP:
if (!lws_get_parent(wsi))
break;
lwsl_err("%s: LWS_CALLBACK_CLOSED_CLIENT_HTTP\n", __func__);
lws_set_timeout(lws_get_parent(wsi), LWS_TO_KILL_ASYNC,
PENDING_TIMEOUT_KILLED_BY_PROXY_CLIENT_CLOSE);
break;
case LWS_CALLBACK_CLIENT_APPEND_HANDSHAKE_HEADER:
parent = lws_get_parent(wsi);
if (!parent)
break;
p = (unsigned char **)in;
end = (*p) + len;
/*
* copy these headers from the parent request to the client
* connection's request
*/
proxy_header(wsi, parent, (unsigned char *)buf, sizeof(buf),
WSI_TOKEN_HOST, p, end);
proxy_header(wsi, parent, (unsigned char *)buf, sizeof(buf),
WSI_TOKEN_HTTP_ETAG, p, end);
proxy_header(wsi, parent, (unsigned char *)buf, sizeof(buf),
WSI_TOKEN_HTTP_IF_MODIFIED_SINCE, p, end);
proxy_header(wsi, parent, (unsigned char *)buf, sizeof(buf),
WSI_TOKEN_HTTP_ACCEPT_LANGUAGE, p, end);
proxy_header(wsi, parent, (unsigned char *)buf, sizeof(buf),
WSI_TOKEN_HTTP_ACCEPT_ENCODING, p, end);
proxy_header(wsi, parent, (unsigned char *)buf, sizeof(buf),
WSI_TOKEN_HTTP_CACHE_CONTROL, p, end);
buf[0] = '\0';
lws_get_peer_simple(parent, buf, sizeof(buf));
if (lws_add_http_header_by_token(wsi, WSI_TOKEN_X_FORWARDED_FOR,
(unsigned char *)buf, (int)strlen(buf), p, end))
return -1;
break;
#endif
#ifdef LWS_WITH_CGI
/* CGI IO events (POLLIN/OUT) appear here, our default policy is:
*
* - POST data goes on subprocess stdin
* - subprocess stdout goes on http via writeable callback
* - subprocess stderr goes to the logs
*/
case LWS_CALLBACK_CGI:
args = (struct lws_cgi_args *)in;
switch (args->ch) { /* which of stdin/out/err ? */
case LWS_STDIN:
/* TBD stdin rx flow control */
break;
case LWS_STDOUT:
/* quench POLLIN on STDOUT until MASTER got writeable */
lws_rx_flow_control(args->stdwsi[LWS_STDOUT], 0);
wsi->reason_bf |= LWS_CB_REASON_AUX_BF__CGI;
/* when writing to MASTER would not block */
lws_callback_on_writable(wsi);
break;
case LWS_STDERR:
n = lws_get_socket_fd(args->stdwsi[LWS_STDERR]);
if (n < 0)
break;
n = read(n, buf, sizeof(buf) - 2);
if (n > 0) {
if (buf[n - 1] != '\n')
buf[n++] = '\n';
buf[n] = '\0';
lwsl_notice("CGI-stderr: %s\n", buf);
}
break;
}
break;
case LWS_CALLBACK_CGI_TERMINATED:
lwsl_debug("LWS_CALLBACK_CGI_TERMINATED: %d %" PRIu64 "\n",
wsi->http.cgi->explicitly_chunked,
(uint64_t)wsi->http.cgi->content_length);
if (!wsi->http.cgi->explicitly_chunked &&
!wsi->http.cgi->content_length) {
/* send terminating chunk */
lwsl_debug("LWS_CALLBACK_CGI_TERMINATED: ending\n");
wsi->reason_bf |= LWS_CB_REASON_AUX_BF__CGI_CHUNK_END;
lws_callback_on_writable(wsi);
lws_set_timeout(wsi, PENDING_TIMEOUT_CGI, 3);
break;
}
return -1;
case LWS_CALLBACK_CGI_STDIN_DATA: /* POST body for stdin */
args = (struct lws_cgi_args *)in;
args->data[args->len] = '\0';
if (!args->stdwsi[LWS_STDIN])
return -1;
n = lws_get_socket_fd(args->stdwsi[LWS_STDIN]);
if (n < 0)
return -1;
#if defined(LWS_WITH_ZLIB)
if (wsi->http.cgi->gzip_inflate) {
/* gzip handling */
if (!wsi->http.cgi->gzip_init) {
lwsl_info("inflating gzip\n");
memset(&wsi->http.cgi->inflate, 0,
sizeof(wsi->http.cgi->inflate));
if (inflateInit2(&wsi->http.cgi->inflate,
16 + 15) != Z_OK) {
lwsl_err("%s: iniflateInit failed\n",
__func__);
return -1;
}
wsi->http.cgi->gzip_init = 1;
}
wsi->http.cgi->inflate.next_in = args->data;
wsi->http.cgi->inflate.avail_in = args->len;
do {
wsi->http.cgi->inflate.next_out =
wsi->http.cgi->inflate_buf;
wsi->http.cgi->inflate.avail_out =
sizeof(wsi->http.cgi->inflate_buf);
n = inflate(&wsi->http.cgi->inflate,
Z_SYNC_FLUSH);
switch (n) {
case Z_NEED_DICT:
case Z_STREAM_ERROR:
case Z_DATA_ERROR:
case Z_MEM_ERROR:
inflateEnd(&wsi->http.cgi->inflate);
wsi->http.cgi->gzip_init = 0;
lwsl_err("zlib error inflate %d\n", n);
return -1;
}
if (wsi->http.cgi->inflate.avail_out !=
sizeof(wsi->http.cgi->inflate_buf)) {
int written;
written = write(args->stdwsi[LWS_STDIN]->desc.filefd,
wsi->http.cgi->inflate_buf,
sizeof(wsi->http.cgi->inflate_buf) -
wsi->http.cgi->inflate.avail_out);
if (written != (int)(
sizeof(wsi->http.cgi->inflate_buf) -
wsi->http.cgi->inflate.avail_out)) {
lwsl_notice("LWS_CALLBACK_CGI_STDIN_DATA: "
"sent %d only %d went", n, args->len);
}
if (n == Z_STREAM_END) {
lwsl_err("gzip inflate end\n");
inflateEnd(&wsi->http.cgi->inflate);
wsi->http.cgi->gzip_init = 0;
break;
}
} else
break;
if (wsi->http.cgi->inflate.avail_out)
break;
} while (1);
return args->len;
}
#endif /* WITH_ZLIB */
n = write(n, args->data, args->len);
// lwsl_hexdump_notice(args->data, args->len);
if (n < args->len)
lwsl_notice("LWS_CALLBACK_CGI_STDIN_DATA: "
"sent %d only %d went", n, args->len);
if (wsi->http.cgi->post_in_expected && args->stdwsi[LWS_STDIN] &&
args->stdwsi[LWS_STDIN]->desc.filefd > 0) {
wsi->http.cgi->post_in_expected -= n;
if (!wsi->http.cgi->post_in_expected) {
struct lws *siwsi = args->stdwsi[LWS_STDIN];
lwsl_debug("%s: expected POST in end: "
"closing stdin wsi %p, fd %d\n",
__func__, siwsi, siwsi->desc.sockfd);
__remove_wsi_socket_from_fds(siwsi);
lwsi_set_state(siwsi, LRS_DEAD_SOCKET);
siwsi->socket_is_permanently_unusable = 1;
lws_remove_child_from_any_parent(siwsi);
if (wsi->context->event_loop_ops->
close_handle_manually) {
wsi->context->event_loop_ops->
close_handle_manually(siwsi);
siwsi->told_event_loop_closed = 1;
} else {
compatible_close(siwsi->desc.sockfd);
__lws_free_wsi(siwsi);
}
wsi->http.cgi->pipe_fds[LWS_STDIN][1] = -1;
args->stdwsi[LWS_STDIN] = NULL;
}
}
return n;
#endif /* WITH_CGI */
#endif /* ROLE_ H1 / H2 */
case LWS_CALLBACK_SSL_INFO:
si = in;
(void)si;
lwsl_notice("LWS_CALLBACK_SSL_INFO: where: 0x%x, ret: 0x%x\n",
si->where, si->ret);
break;
#if LWS_MAX_SMP > 1
case LWS_CALLBACK_GET_THREAD_ID:
return (int)(unsigned long long)pthread_self();
#endif
default:
break;
}
return 0;
}
static int
callback_http(struct lws *wsi, enum lws_callback_reasons reason,
void *user, void *in, size_t len)
{
switch (reason) {
/* because we are protocols[0] ... */
case LWS_CALLBACK_CLIENT_CONNECTION_ERROR:
lwsl_err("CLIENT_CONNECTION_ERROR: %s\n",
in ? (char *)in : "(null)");
client_wsi = NULL;
break;
case LWS_CALLBACK_ESTABLISHED_CLIENT_HTTP:
status = lws_http_client_http_response(wsi);
lwsl_user("Connected with server response: %d\n", status);
break;
/* chunks of chunked content, with header removed */
case LWS_CALLBACK_RECEIVE_CLIENT_HTTP_READ:
lwsl_user("RECEIVE_CLIENT_HTTP_READ: read %d\n", (int)len);
#if 0 /* enable to dump the html */
{
const char *p = in;
while (len--)
if (*p < 0x7f)
putchar(*p++);
else
putchar('.');
}
#endif
return 0; /* don't passthru */
/* uninterpreted http content */
case LWS_CALLBACK_RECEIVE_CLIENT_HTTP:
{
char buffer[1024 + LWS_PRE];
char *px = buffer + LWS_PRE;
int lenx = sizeof(buffer) - LWS_PRE;
if (lws_http_client_read(wsi, &px, &lenx) < 0)
return -1;
}
return 0; /* don't passthru */
case LWS_CALLBACK_COMPLETED_CLIENT_HTTP:
lwsl_user("LWS_CALLBACK_COMPLETED_CLIENT_HTTP\n");
client_wsi = NULL;
bad = status != 200;
lws_cancel_service(lws_get_context(wsi)); /* abort poll wait */
break;
case LWS_CALLBACK_CLOSED_CLIENT_HTTP:
client_wsi = NULL;
bad = status != 200;
lws_cancel_service(lws_get_context(wsi)); /* abort poll wait */
break;
default:
break;
}
return lws_callback_http_dummy(wsi, reason, user, in, len);
}
static int
callback_acme_client(struct lws *wsi, enum lws_callback_reasons reason,
void *user, void *in, size_t len)
{
struct per_vhost_data__lws_acme_client *vhd =
(struct per_vhost_data__lws_acme_client *)
lws_protocol_vh_priv_get(lws_get_vhost(wsi),
lws_get_protocol(wsi));
char buf[LWS_PRE + 2536], *start = buf + LWS_PRE, *p = start,
*end = buf + sizeof(buf) - 1, digest[32], *failreason = NULL;
unsigned char **pp, *pend;
const char *content_type;
const struct lws_protocol_vhost_options *pvo;
struct lws_acme_cert_aging_args *caa;
struct acme_connection *ac = NULL;
struct lws_genhash_ctx hctx;
struct lws *cwsi;
int n, m;
if (vhd)
ac = vhd->ac;
switch ((int)reason) {
case LWS_CALLBACK_PROTOCOL_INIT:
vhd = lws_protocol_vh_priv_zalloc(lws_get_vhost(wsi),
lws_get_protocol(wsi),
sizeof(struct per_vhost_data__lws_acme_client));
vhd->context = lws_get_context(wsi);
vhd->protocol = lws_get_protocol(wsi);
vhd->vhost = lws_get_vhost(wsi);
/* compute how much we need to hold all the pvo payloads */
m = 0;
pvo = (const struct lws_protocol_vhost_options *)in;
while (pvo) {
m += strlen(pvo->value) + 1;
pvo = pvo->next;
}
p = vhd->pvo_data = malloc(m);
if (!p)
return -1;
pvo = (const struct lws_protocol_vhost_options *)in;
while (pvo) {
start = p;
n = strlen(pvo->value) + 1;
memcpy(start, pvo->value, n);
p += n;
for (m = 0; m < (int)LWS_ARRAY_SIZE(pvo_names); m++)
if (!strcmp(pvo->name, pvo_names[m]))
vhd->pvop[m] = start;
pvo = pvo->next;
}
n = 0;
for (m = 0; m < (int)LWS_ARRAY_SIZE(pvo_names); m++)
if (!vhd->pvop[m] && m >= LWS_TLS_REQ_ELEMENT_COMMON_NAME) {
lwsl_notice("%s: require pvo '%s'\n", __func__,
pvo_names[m]);
n |= 1;
} else
if (vhd->pvop[m])
lwsl_info(" %s: %s\n", pvo_names[m],
vhd->pvop[m]);
if (n) {
free(vhd->pvo_data);
vhd->pvo_data = NULL;
return -1;
}
#if !defined(LWS_WITH_ESP32)
/*
* load (or create) the registration keypair while we
* still have root
*/
if (lws_acme_load_create_auth_keys(vhd, 4096))
return 1;
/*
* in case we do an update, open the update files while we
* still have root
*/
lws_snprintf(buf, sizeof(buf) - 1, "%s.upd",
vhd->pvop[LWS_TLS_SET_CERT_PATH]);
vhd->fd_updated_cert = lws_open(buf, LWS_O_WRONLY | LWS_O_CREAT |
LWS_O_TRUNC, 0600);
if (vhd->fd_updated_cert < 0) {
lwsl_err("unable to create update cert file %s\n", buf);
return -1;
}
lws_snprintf(buf, sizeof(buf) - 1, "%s.upd",
vhd->pvop[LWS_TLS_SET_KEY_PATH]);
vhd->fd_updated_key = lws_open(buf, LWS_O_WRONLY | LWS_O_CREAT |
LWS_O_TRUNC, 0600);
if (vhd->fd_updated_key < 0) {
lwsl_err("unable to create update key file %s\n", buf);
return -1;
}
#endif
break;
case LWS_CALLBACK_PROTOCOL_DESTROY:
if (vhd && vhd->pvo_data) {
free(vhd->pvo_data);
vhd->pvo_data = NULL;
}
if (vhd)
lws_acme_finished(vhd);
break;
case LWS_CALLBACK_VHOST_CERT_AGING:
if (!vhd)
break;
caa = (struct lws_acme_cert_aging_args *)in;
/*
* Somebody is telling us about a cert some vhost is using.
*
* First see if the cert is getting close enough to expiry that
* we *want* to do something about it.
*/
if ((int)(ssize_t)len > 14)
break;
/*
* ...is this a vhost we were configured on?
*/
if (vhd->vhost != caa->vh)
return 1;
for (n = 0; n < (int)LWS_ARRAY_SIZE(vhd->pvop);n++)
if (caa->element_overrides[n])
vhd->pvop_active[n] = caa->element_overrides[n];
else
vhd->pvop_active[n] = vhd->pvop[n];
lwsl_notice("starting acme acquisition on %s: %s\n",
lws_get_vhost_name(caa->vh), vhd->pvop_active[LWS_TLS_SET_DIR_URL]);
lws_acme_start_acquisition(vhd, caa->vh);
break;
/*
* Client
*/
case LWS_CALLBACK_CLIENT_ESTABLISHED:
lwsl_notice("%s: CLIENT_ESTABLISHED\n", __func__);
break;
case LWS_CALLBACK_CLIENT_CONNECTION_ERROR:
lwsl_notice("%s: CLIENT_CONNECTION_ERROR: %p\n", __func__, wsi);
break;
case LWS_CALLBACK_CLOSED_CLIENT_HTTP:
lwsl_notice("%s: CLOSED_CLIENT_HTTP: %p\n", __func__, wsi);
break;
case LWS_CALLBACK_CLOSED:
lwsl_notice("%s: CLOSED: %p\n", __func__, wsi);
break;
case LWS_CALLBACK_ESTABLISHED_CLIENT_HTTP:
lwsl_notice("lws_http_client_http_response %d\n",
lws_http_client_http_response(wsi));
if (!ac)
break;
ac->resp = lws_http_client_http_response(wsi);
/* we get a new nonce each time */
if (lws_hdr_total_length(wsi, WSI_TOKEN_REPLAY_NONCE) &&
lws_hdr_copy(wsi, ac->replay_nonce,
sizeof(ac->replay_nonce),
WSI_TOKEN_REPLAY_NONCE) < 0) {
lwsl_notice("%s: nonce too large\n", __func__);
goto failed;
}
switch (ac->state) {
case ACME_STATE_DIRECTORY:
lejp_construct(&ac->jctx, cb_dir, vhd, jdir_tok,
LWS_ARRAY_SIZE(jdir_tok));
break;
case ACME_STATE_NEW_REG:
break;
case ACME_STATE_NEW_AUTH:
lejp_construct(&ac->jctx, cb_authz, ac, jauthz_tok,
LWS_ARRAY_SIZE(jauthz_tok));
break;
case ACME_STATE_POLLING:
case ACME_STATE_ACCEPT_CHALL:
lejp_construct(&ac->jctx, cb_chac, ac, jchac_tok,
LWS_ARRAY_SIZE(jchac_tok));
break;
case ACME_STATE_POLLING_CSR:
ac->cpos = 0;
if (ac->resp != 201)
break;
/*
* He acknowledges he will create the cert...
* get the URL to GET it from in the Location
* header.
*/
if (lws_hdr_copy(wsi, ac->challenge_uri,
sizeof(ac->challenge_uri),
WSI_TOKEN_HTTP_LOCATION) < 0) {
lwsl_notice("%s: missing cert location:\n",
__func__);
goto failed;
}
lwsl_notice("told to fetch cert from %s\n",
ac->challenge_uri);
break;
default:
break;
}
break;
case LWS_CALLBACK_CLIENT_APPEND_HANDSHAKE_HEADER:
if (!ac)
break;
switch (ac->state) {
case ACME_STATE_DIRECTORY:
break;
case ACME_STATE_NEW_REG:
p += lws_snprintf(p, end - p, "{"
"\"resource\":\"new-reg\","
"\"contact\":["
"\"mailto:%s\""
"],\"agreement\":\"%s\""
"}",
vhd->pvop_active[LWS_TLS_REQ_ELEMENT_EMAIL],
ac->urls[JAD_TOS_URL]);
puts(start);
pkt_add_hdrs:
ac->len = lws_jws_create_packet(&vhd->jwk,
start, p - start,
ac->replay_nonce,
&ac->buf[LWS_PRE],
sizeof(ac->buf) -
LWS_PRE);
if (ac->len < 0) {
ac->len = 0;
lwsl_notice("lws_jws_create_packet failed\n");
goto failed;
}
pp = (unsigned char **)in;
pend = (*pp) + len;
ac->pos = 0;
content_type = "application/jose+json";
if (ac->state == ACME_STATE_POLLING_CSR)
content_type = "application/pkix-cert";
if (lws_add_http_header_by_token(wsi,
WSI_TOKEN_HTTP_CONTENT_TYPE,
(uint8_t *)content_type, 21, pp, pend)) {
lwsl_notice("could not add content type\n");
goto failed;
}
n = sprintf(buf, "%d", ac->len);
if (lws_add_http_header_by_token(wsi,
WSI_TOKEN_HTTP_CONTENT_LENGTH,
(uint8_t *)buf, n, pp, pend)) {
lwsl_notice("could not add content length\n");
goto failed;
}
lws_client_http_body_pending(wsi, 1);
lws_callback_on_writable(wsi);
lwsl_notice("prepare to send ACME_STATE_NEW_REG\n");
break;
case ACME_STATE_NEW_AUTH:
p += lws_snprintf(p, end - p,
"{"
"\"resource\":\"new-authz\","
"\"identifier\":{"
"\"type\":\"http-01\","
"\"value\":\"%s\""
"}"
"}", vhd->pvop_active[LWS_TLS_REQ_ELEMENT_COMMON_NAME]);
goto pkt_add_hdrs;
case ACME_STATE_ACCEPT_CHALL:
/*
* Several of the challenges in this document makes use
* of a key authorization string. A key authorization
* expresses a domain holder's authorization for a
* specified key to satisfy a specified challenge, by
* concatenating the token for the challenge with a key
* fingerprint, separated by a "." character:
*
* key-authz = token || '.' ||
* base64(JWK_Thumbprint(accountKey))
*
* The "JWK_Thumbprint" step indicates the computation
* specified in [RFC7638], using the SHA-256 digest. As
* specified in the individual challenges below, the
* token for a challenge is a JSON string comprised
* entirely of characters in the base64 alphabet.
* The "||" operator indicates concatenation of strings.
*
* keyAuthorization (required, string): The key
* authorization for this challenge. This value MUST
* match the token from the challenge and the client's
* account key.
*
* draft acme-01 tls-sni-01:
*
* {
* "keyAuthorization": "evaGxfADs...62jcerQ",
* } (Signed as JWS)
*
* draft acme-07 tls-sni-02:
*
* POST /acme/authz/1234/1
* Host: example.com
* Content-Type: application/jose+json
*
* {
* "protected": base64url({
* "alg": "ES256",
* "kid": "https://example.com/acme/acct/1",
* "nonce": "JHb54aT_KTXBWQOzGYkt9A",
* "url": "https://example.com/acme/authz/1234/1"
* }),
* "payload": base64url({
* "keyAuthorization": "evaGxfADs...62jcerQ"
* }),
* "signature": "Q1bURgJoEslbD1c5...3pYdSMLio57mQNN4"
* }
*
* On receiving a response, the server MUST verify that
* the key authorization in the response matches the
* "token" value in the challenge and the client's
* account key. If they do not match, then the server
* MUST return an HTTP error in response to the POST
* request in which the client sent the challenge.
*/
lws_jwk_rfc7638_fingerprint(&vhd->jwk, digest);
p = start;
end = &buf[sizeof(buf) - 1];
p += lws_snprintf(p, end - p,
"{\"resource\":\"challenge\","
"\"type\":\"tls-sni-0%d\","
"\"keyAuthorization\":\"%s.",
1 + ac->is_sni_02,
ac->chall_token);
n = lws_jws_base64_enc(digest, 32, p, end - p);
if (n < 0)
goto failed;
p += n;
p += lws_snprintf(p, end - p, "\"}");
puts(start);
goto pkt_add_hdrs;
case ACME_STATE_POLLING:
break;
case ACME_STATE_POLLING_CSR:
/*
* "To obtain a certificate for the domain, the agent
* constructs a PKCS#10 Certificate Signing Request that
* asks the Let’s Encrypt CA to issue a certificate for
* example.com with a specified public key. As usual,
* the CSR includes a signature by the private key
* corresponding to the public key in the CSR. The agent
* also signs the whole CSR with the authorized
* key for example.com so that the Let’s Encrypt CA
* knows it’s authorized."
*
* IOW we must create a new RSA keypair which will be
* the cert public + private key, and put the public
* key in the CSR. The CSR, just for transport, is also
* signed with our JWK, showing that as the owner of the
* authorized JWK, the request should be allowed.
*
* The cert comes back with our public key in it showing
* that the owner of the matching private key (we
* created that keypair) is the owner of the cert.
*
* We feed the CSR the elements we want in the cert,
* like the CN etc, and it gives us the b64URL-encoded
* CSR and the PEM-encoded (public +)private key in
* memory buffers.
*/
if (ac->goes_around)
break;
p += lws_snprintf(p, end - p,
"{\"resource\":\"new-cert\","
"\"csr\":\"");
n = lws_tls_acme_sni_csr_create(vhd->context,
&vhd->pvop_active[0],
(uint8_t *)p, end - p,
&ac->alloc_privkey_pem,
&ac->len_privkey_pem);
if (n < 0) {
lwsl_notice("CSR generation failed\n");
goto failed;
}
p += n;
p += lws_snprintf(p, end - p, "\"}");
puts(start);
goto pkt_add_hdrs;
default:
break;
}
break;
case LWS_CALLBACK_CLIENT_HTTP_WRITEABLE:
lwsl_notice("LWS_CALLBACK_CLIENT_HTTP_WRITEABLE\n");
if (!ac)
break;
if (ac->pos == ac->len)
break;
ac->buf[LWS_PRE + ac->len] = '\0';
if (lws_write(wsi, (uint8_t *)ac->buf + LWS_PRE,
ac->len, LWS_WRITE_HTTP_FINAL) < 0)
return -1;
lwsl_notice("wrote %d\n", ac->len);
ac->pos = ac->len;
lws_client_http_body_pending(wsi, 0);
break;
/* chunked content */
case LWS_CALLBACK_RECEIVE_CLIENT_HTTP_READ:
if (!ac)
return -1;
switch (ac->state) {
case ACME_STATE_POLLING:
case ACME_STATE_ACCEPT_CHALL:
case ACME_STATE_NEW_AUTH:
case ACME_STATE_DIRECTORY:
((char *)in)[len] = '\0';
puts(in);
m = (int)(signed char)lejp_parse(&ac->jctx,
(uint8_t *)in, len);
if (m < 0 && m != LEJP_CONTINUE) {
lwsl_notice("lejp parse failed %d\n", m);
goto failed;
}
break;
case ACME_STATE_NEW_REG:
((char *)in)[len] = '\0';
puts(in);
break;
case ACME_STATE_POLLING_CSR:
/* it should be the DER cert! */
if (ac->cpos + len > sizeof(ac->buf)) {
lwsl_notice("Incoming cert is too large!\n");
goto failed;
}
memcpy(&ac->buf[ac->cpos], in, len);
ac->cpos += len;
break;
default:
break;
}
break;
/* unchunked content */
case LWS_CALLBACK_RECEIVE_CLIENT_HTTP:
lwsl_notice("%s: LWS_CALLBACK_RECEIVE_CLIENT_HTTP\n", __func__);
{
char buffer[2048 + LWS_PRE];
char *px = buffer + LWS_PRE;
int lenx = sizeof(buffer) - LWS_PRE;
if (lws_http_client_read(wsi, &px, &lenx) < 0)
return -1;
}
break;
case LWS_CALLBACK_COMPLETED_CLIENT_HTTP:
lwsl_notice("%s: COMPLETED_CLIENT_HTTP\n", __func__);
if (!ac)
return -1;
switch (ac->state) {
case ACME_STATE_DIRECTORY:
lejp_destruct(&ac->jctx);
/* check dir validity */
for (n = 0; n < 6; n++)
lwsl_notice(" %d: %s\n", n, ac->urls[n]);
/*
* So... having the directory now... we try to
* register our keys next. It's OK if it ends up
* they're already registered... this eliminates any
* gaps where we stored the key but registration did
* not complete for some reason...
*/
ac->state = ACME_STATE_NEW_REG;
lws_acme_report_status(vhd->vhost, LWS_CUS_REG, NULL);
strcpy(buf, ac->urls[JAD_NEW_REG_URL]);
cwsi = lws_acme_client_connect(vhd->context, vhd->vhost,
&ac->cwsi, &ac->i, buf,
"POST");
if (!cwsi) {
lwsl_notice("%s: failed to connect to acme\n",
__func__);
goto failed;
}
return -1; /* close the completed client connection */
case ACME_STATE_NEW_REG:
if ((ac->resp >= 200 && ac->resp < 299) ||
ac->resp == 409) {
/*
* Our account already existed, or exists now.
*
* Move on to requesting a cert auth.
*/
ac->state = ACME_STATE_NEW_AUTH;
lws_acme_report_status(vhd->vhost, LWS_CUS_AUTH,
NULL);
strcpy(buf, ac->urls[JAD_NEW_AUTHZ_URL]);
cwsi = lws_acme_client_connect(vhd->context,
vhd->vhost, &ac->cwsi,
&ac->i, buf, "POST");
if (!cwsi)
lwsl_notice("%s: failed to connect\n",
__func__);
return -1; /* close the completed client connection */
} else {
lwsl_notice("new-reg replied %d\n", ac->resp);
goto failed;
}
return -1; /* close the completed client connection */
case ACME_STATE_NEW_AUTH:
lejp_destruct(&ac->jctx);
if (ac->resp / 100 == 4) {
lws_snprintf(buf, sizeof(buf),
"Auth failed: %s", ac->detail);
failreason = buf;
lwsl_notice("auth failed\n");
goto failed;
}
lwsl_notice("chall: %s (%d)\n", ac->chall_token, ac->resp);
if (!ac->chall_token[0]) {
lwsl_notice("no challenge\n");
goto failed;
}
ac->state = ACME_STATE_ACCEPT_CHALL;
lws_acme_report_status(vhd->vhost, LWS_CUS_CHALLENGE,
NULL);
/* tls-sni-01 ... what a mess.
* The stuff in
* https://tools.ietf.org/html/
* draft-ietf-acme-acme-01#section-7.3
* "requires" n but it's missing from let's encrypt
* tls-sni-01 challenge. The go docs say that they just
* implement one hashing round regardless
* https://godoc.org/golang.org/x/crypto/acme
*
* The go way is what is actually implemented today by
* letsencrypt
*
* "A client responds to this challenge by constructing
* a key authorization from the "token" value provided
* in the challenge and the client's account key. The
* client first computes the SHA-256 digest Z0 of the
* UTF8-encoded key authorization, and encodes Z0 in
* UTF-8 lower-case hexadecimal form."
*/
/* tls-sni-02
*
* SAN A MUST be constructed as follows: compute the
* SHA-256 digest of the UTF-8-encoded challenge token
* and encode it in lowercase hexadecimal form. The
* dNSName is "x.y.token.acme.invalid", where x
* is the first half of the hexadecimal representation
* and y is the second half.
*/
memset(&ac->ci, 0, sizeof(ac->ci));
/* first compute the key authorization */
lws_jwk_rfc7638_fingerprint(&vhd->jwk, digest);
p = start;
end = &buf[sizeof(buf) - 1];
p += lws_snprintf(p, end - p, "%s.", ac->chall_token);
n = lws_jws_base64_enc(digest, 32, p, end - p);
if (n < 0)
goto failed;
p += n;
if (lws_genhash_init(&hctx, LWS_GENHASH_TYPE_SHA256))
return -1;
if (lws_genhash_update(&hctx, (uint8_t *)start,
lws_ptr_diff(p, start))) {
lws_genhash_destroy(&hctx, NULL);
return -1;
}
if (lws_genhash_destroy(&hctx, digest))
return -1;
p = buf;
for (n = 0; n < 32; n++) {
p += lws_snprintf(p, end - p, "%02x",
digest[n] & 0xff);
if (n == (32 / 2) - 1)
p = buf + 64;
}
p = ac->san_a;
if (ac->is_sni_02) {
lws_snprintf(p, sizeof(ac->san_a),
"%s.%s.token.acme.invalid",
buf, buf + 64);
/*
* SAN B MUST be constructed as follows: compute
* the SHA-256 digest of the UTF-8 encoded key
* authorization and encode it in lowercase
* hexadecimal form. The dNSName is
* "x.y.ka.acme.invalid" where x is the first
* half of the hexadecimal representation and y
* is the second half.
*/
lws_jwk_rfc7638_fingerprint(&vhd->jwk,
(char *)digest);
p = buf;
for (n = 0; n < 32; n++) {
p += lws_snprintf(p, end - p, "%02x",
digest[n] & 0xff);
if (n == (32 / 2) - 1)
p = buf + 64;
}
p = ac->san_b;
lws_snprintf(p, sizeof(ac->san_b),
"%s.%s.ka.acme.invalid",
buf, buf + 64);
} else {
lws_snprintf(p, sizeof(ac->san_a),
"%s.%s.acme.invalid", buf, buf + 64);
ac->san_b[0] = '\0';
}
lwsl_notice("san_a: '%s'\n", ac->san_a);
lwsl_notice("san_b: '%s'\n", ac->san_b);
/*
* tls-sni-01:
*
* The client then configures the TLS server at the
* domain such that when a handshake is initiated with
* the Server Name Indication extension set to
* "<Zi[0:32]>.<Zi[32:64]>.acme.invalid", the
* corresponding generated certificate is presented.
*
* tls-sni-02:
*
* The client MUST ensure that the certificate is
* served to TLS connections specifying a Server Name
* Indication (SNI) value of SAN A.
*/
ac->ci.vhost_name = ac->san_a;
/*
* we bind to exact iface of real vhost, so we can
* share the listen socket by SNI
*/
ac->ci.iface = ac->real_vh_iface;
/* listen on the same port as the vhost that triggered
* us */
ac->ci.port = ac->real_vh_port;
/* Skip filling in any x509 info into the ssl_ctx.
* It will be done at the callback
* LWS_CALLBACK_OPENSSL_LOAD_EXTRA_SERVER_VERIFY_CERTS
* in this callback handler (below)
*/
ac->ci.options = LWS_SERVER_OPTION_CREATE_VHOST_SSL_CTX |
LWS_SERVER_OPTION_SKIP_PROTOCOL_INIT |
LWS_SERVER_OPTION_DO_SSL_GLOBAL_INIT;
/* make ourselves protocols[0] for the new vhost */
ac->ci.protocols = acme_protocols;
/*
* vhost .user points to the ac associated with the
* temporary vhost
*/
ac->ci.user = ac;
ac->vhost = lws_create_vhost(lws_get_context(wsi),
&ac->ci);
if (!ac->vhost)
goto failed;
/*
* The challenge-specific vhost is up... let the ACME
* server know we are ready to roll...
*/
ac->goes_around = 0;
cwsi = lws_acme_client_connect(vhd->context, vhd->vhost,
&ac->cwsi, &ac->i,
ac->challenge_uri,
"POST");
if (!cwsi) {
lwsl_notice("%s: failed to connect\n",
__func__);
goto failed;
}
return -1; /* close the completed client connection */
case ACME_STATE_ACCEPT_CHALL:
/*
* he returned something like this (which we parsed)
*
* {
* "type": "tls-sni-01",
* "status": "pending",
* "uri": "https://acme-staging.api.letsencrypt.org/
* acme/challenge/xCt7bT3FaxoIQU3Qry87t5h
* uKDcC-L-0ERcD5DLAZts/71100507",
* "token": "j2Vs-vLI_dsza4A35SFHIU03aIe2PzFRijbqCY
* dIVeE",
* "keyAuthorization": "j2Vs-vLI_dsza4A35SFHIU03aIe2
* PzFRijbqCYdIVeE.nmOtdFd8Jikn6K8NnYYmT5
* vCM_PwSDT8nLdOYoFXhRU"
* }
*
*/
lwsl_notice("%s: COMPLETED accept chall: %s\n",
__func__, ac->challenge_uri);
poll_again:
ac->state = ACME_STATE_POLLING;
lws_acme_report_status(vhd->vhost, LWS_CUS_CHALLENGE, NULL);
if (ac->goes_around++ == 20) {
lwsl_notice("%s: too many chall retries\n",
__func__);
goto failed;
}
lws_timed_callback_vh_protocol(vhd->vhost, vhd->protocol,
LWS_CALLBACK_USER + 0xac33, ac->goes_around == 1 ? 10 : 2);
return -1; /* close the completed client connection */
case ACME_STATE_POLLING:
if (ac->resp == 202 &&
strcmp(ac->status, "invalid") &&
strcmp(ac->status, "valid")) {
lwsl_notice("status: %s\n", ac->status);
goto poll_again;
}
if (!strcmp(ac->status, "invalid")) {
lwsl_notice("%s: polling failed\n", __func__);
lws_snprintf(buf, sizeof(buf),
"Challenge Invalid: %s", ac->detail);
failreason = buf;
goto failed;
}
lwsl_notice("Challenge passed\n");
/*
* The challenge was validated... so delete the
* temp SNI vhost now its job is done
*/
if (ac->vhost)
lws_vhost_destroy(ac->vhost);
ac->vhost = NULL;
/*
* now our JWK is accepted as authorized to make
* requests for the domain, next move is create the
* CSR signed with the JWK, and send it to the ACME
* server to request the actual certs.
*/
ac->state = ACME_STATE_POLLING_CSR;
lws_acme_report_status(vhd->vhost, LWS_CUS_REQ, NULL);
ac->goes_around = 0;
strcpy(buf, ac->urls[JAD_NEW_CERT_URL]);
cwsi = lws_acme_client_connect(vhd->context, vhd->vhost,
&ac->cwsi, &ac->i, buf,
"POST");
if (!cwsi) {
lwsl_notice("%s: failed to connect to acme\n",
__func__);
goto failed;
}
return -1; /* close the completed client connection */
case ACME_STATE_POLLING_CSR:
/*
* (after POSTing the CSR)...
*
* If the CA decides to issue a certificate, then the
* server creates a new certificate resource and
* returns a URI for it in the Location header field
* of a 201 (Created) response.
*
* HTTP/1.1 201 Created
* Location: https://example.com/acme/cert/asdf
*
* If the certificate is available at the time of the
* response, it is provided in the body of the response.
* If the CA has not yet issued the certificate, the
* body of this response will be empty. The client
* should then send a GET request to the certificate URI
* to poll for the certificate. As long as the
* certificate is unavailable, the server MUST provide a
* 202 (Accepted) response and include a Retry-After
* header to indicate when the server believes the
* certificate will be issued.
*/
if (ac->resp < 200 || ac->resp > 202) {
lwsl_notice("CSR poll failed on resp %d\n",
ac->resp);
goto failed;
}
if (ac->resp == 200) {
char *pp;
int max;
lwsl_notice("The cert was sent..\n");
lws_acme_report_status(vhd->vhost,
LWS_CUS_ISSUE, NULL);
/*
* That means we have the issued cert DER in
* ac->buf, length in ac->cpos; and the key in
* ac->alloc_privkey_pem, length in
* ac->len_privkey_pem.
*
* We write out a PEM copy of the cert, and a
* PEM copy of the private key, using the
* write-only fds we opened while we still
* had root.
*
* Estimate the size of the PEM version of the
* cert and allocate a temp buffer for it.
*
* This is a bit complicated because first we
* drop the b64url version into the buffer at
* +384, then we add the header at 0 and move
* lines of it back + '\n' to make PEM.
*
* This avoids the need for two fullsize
* allocations.
*/
max = (ac->cpos * 4) / 3 + 16 + 384;
start = p = malloc(max);
if (!p)
goto failed;
n = lws_b64_encode_string(ac->buf, ac->cpos,
start + 384, max - 384);
if (n < 0) {
free(start);
goto failed;
}
pp = start + 384;
p += lws_snprintf(start, 64, "%s",
"-----BEGIN CERTIFICATE-----\n");
while (n) {
m = 65;
if (n < m)
m = n;
memcpy(p, pp, m);
n -= m;
p += m;
pp += m;
if (n)
*p++ = '\n';
}
p += lws_snprintf(p,
max - lws_ptr_diff(p, start),
"%s",
"\n-----END CERTIFICATE-----\n");
n = lws_plat_write_cert(vhd->vhost, 0,
vhd->fd_updated_cert, start,
lws_ptr_diff(p, start));
free(start);
if (n) {
lwsl_err("unable to write ACME cert! %d\n", n);
goto failed;
}
/*
* don't close it... we may update the certs
* again
*/
if (lws_plat_write_cert(vhd->vhost, 1,
vhd->fd_updated_key,
ac->alloc_privkey_pem,
ac->len_privkey_pem)) {
lwsl_err("unable to write ACME key!\n");
goto failed;
}
/*
* we have written the persistent copies
*/
lwsl_notice("%s: Updated certs written for %s "
"to %s.upd and %s.upd\n", __func__,
vhd->pvop_active[LWS_TLS_REQ_ELEMENT_COMMON_NAME],
vhd->pvop_active[LWS_TLS_SET_CERT_PATH],
vhd->pvop_active[LWS_TLS_SET_KEY_PATH]);
/* notify lws there was a cert update */
if (lws_tls_cert_updated(vhd->context,
vhd->pvop_active[LWS_TLS_SET_CERT_PATH],
vhd->pvop_active[LWS_TLS_SET_KEY_PATH],
ac->buf, ac->cpos,
ac->alloc_privkey_pem,
ac->len_privkey_pem)) {
lwsl_notice("problem setting certs\n");
}
lws_acme_finished(vhd);
lws_acme_report_status(vhd->vhost,
LWS_CUS_SUCCESS, NULL);
return 0;
}
lws_acme_report_status(vhd->vhost, LWS_CUS_CONFIRM, NULL);
/* he is preparing the cert, go again with a GET */
if (ac->goes_around++ == 30) {
lwsl_notice("%s: too many retries\n",
__func__);
goto failed;
}
strcpy(buf, ac->challenge_uri);
cwsi = lws_acme_client_connect(vhd->context, vhd->vhost,
&ac->cwsi, &ac->i, buf,
"GET");
if (!cwsi) {
lwsl_notice("%s: failed to connect to acme\n",
__func__);
goto failed;
}
return -1; /* close the completed client connection */
default:
break;
}
break;
case LWS_CALLBACK_USER + 0xac33:
if (!vhd)
break;
cwsi = lws_acme_client_connect(vhd->context, vhd->vhost,
&ac->cwsi, &ac->i,
ac->challenge_uri,
"GET");
if (!cwsi) {
lwsl_notice("%s: failed to connect\n", __func__);
goto failed;
}
break;
case LWS_CALLBACK_OPENSSL_LOAD_EXTRA_SERVER_VERIFY_CERTS:
/*
* This goes to vhost->protocols[0], but for our temp certs
* vhost we created, we have arranged that to be our protocol,
* so the callback will come here.
*
* When we created the temp vhost, we set its pvo to point
* to the ac associated with the temp vhost.
*/
lwsl_debug("LWS_CALLBACK_OPENSSL_LOAD_EXTRA_SERVER_VERIFY_CERTS\n");
ac = (struct acme_connection *)lws_get_vhost_user(
(struct lws_vhost *)in);
lws_acme_report_status((struct lws_vhost *)in,
LWS_CUS_CREATE_REQ,
"creating challenge cert");
if (lws_tls_acme_sni_cert_create((struct lws_vhost *)in,
ac->san_a, ac->san_b)) {
lwsl_err("%s: creating the sni test cert failed\n", __func__);
return -1;
}
break;
default:
break;
}
return 0;
failed:
lwsl_err("%s: failed out\n", __func__);
lws_acme_report_status(vhd->vhost, LWS_CUS_FAILED, failreason);
lws_acme_finished(vhd);
return -1;
}
static int
callback_http(struct lws *wsi, enum lws_callback_reasons reason,
void *user, void *in, size_t len)
{
char val[32];
int n;
switch (reason) {
/* because we are protocols[0] ... */
case LWS_CALLBACK_CLIENT_CONNECTION_ERROR:
lwsl_err("CLIENT_CONNECTION_ERROR: %s\n",
in ? (char *)in : "(null)");
client_wsi = NULL;
break;
case LWS_CALLBACK_CLIENT_APPEND_HANDSHAKE_HEADER:
{
unsigned char **p = (unsigned char **)in, *end = (*p) + len;
/*
* How to send a custom header in the request to the server
*/
if (lws_add_http_header_by_name(wsi,
(const unsigned char *)"dnt",
(const unsigned char *)"1", 1, p, end))
return -1;
break;
}
case LWS_CALLBACK_ESTABLISHED_CLIENT_HTTP:
status = lws_http_client_http_response(wsi);
lwsl_user("Connected with server response: %d\n", status);
/*
* How to query custom headers (http 1.x only at the momemnt)
*
* warmcat.com sends a custom header "test-custom-header" for
* testing, it has the fixed value "hello".
*/
n = lws_hdr_custom_length(wsi, "test-custom-header:", 19);
if (n < 0)
lwsl_notice("%s: Can't find test-custom-header\n",
__func__);
else {
if (lws_hdr_custom_copy(wsi, val, sizeof(val),
"test-custom-header:", 19) < 0)
lwsl_notice("%s: custom header too long\n",
__func__);
else
lwsl_notice("%s: custom header: '%s'\n",
__func__, val);
}
break;
/* chunks of chunked content, with header removed */
case LWS_CALLBACK_RECEIVE_CLIENT_HTTP_READ:
lwsl_user("RECEIVE_CLIENT_HTTP_READ: read %d\n", (int)len);
#if 0 /* enable to dump the html */
{
const char *p = in;
while (len--)
if (*p < 0x7f)
putchar(*p++);
else
putchar('.');
}
#endif
return 0; /* don't passthru */
/* uninterpreted http content */
case LWS_CALLBACK_RECEIVE_CLIENT_HTTP:
{
char buffer[1024 + LWS_PRE];
char *px = buffer + LWS_PRE;
int lenx = sizeof(buffer) - LWS_PRE;
if (lws_http_client_read(wsi, &px, &lenx) < 0)
return -1;
}
return 0; /* don't passthru */
case LWS_CALLBACK_COMPLETED_CLIENT_HTTP:
lwsl_user("LWS_CALLBACK_COMPLETED_CLIENT_HTTP\n");
client_wsi = NULL;
bad = status != 200;
lws_cancel_service(lws_get_context(wsi)); /* abort poll wait */
break;
case LWS_CALLBACK_CLOSED_CLIENT_HTTP:
client_wsi = NULL;
bad = status != 200;
lws_cancel_service(lws_get_context(wsi)); /* abort poll wait */
break;
default:
break;
}
return lws_callback_http_dummy(wsi, reason, user, in, len);
}
