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wip: start implementing muxrpc

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This commit is contained in:
Gergely Polonkai 2019-01-04 13:16:50 +01:00
parent c59f8ab201
commit 91c5225e55
2 changed files with 178 additions and 3 deletions
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179
ssb-gtk/sbot.c
View File

@ -28,6 +28,22 @@ struct _SsbScuttler {
GSocketConnection *connection;
};
typedef enum {
SSB_RPC_ASYNC,
SSB_RPC_SOURCE,
SSB_RPC_SINK,
SSB_RPC_DUPLEX
} SsbRPCType;
typedef enum {
SSB_PACKET_TYPE_BUFFER = 0,
SSB_PACKET_TYPE_STRING = 1,
SSB_PACKET_TYPE_JSON = 2,
} SsbPacketType;
#define MAX_MESSAGE_SIZE 32768
#define BOXS_MAXLEN 4096
G_DEFINE_QUARK(ssb_scttler_error_quark, ssb_scuttler_error);
G_DEFINE_TYPE(SsbScuttler, ssb_scuttler, G_TYPE_INITIALLY_UNOWNED);
@ -37,6 +53,16 @@ typedef struct {
guint column;
} ParseData;
typedef struct {
guint32 len;
gint32 request_id;
} PacketHeader;
typedef struct {
guint16 len;
guint8 mac[16];
} BoxsHeader;
static const guchar zeros[24] = {0};
static const guchar ssb_cap[] = {
@ -288,7 +314,7 @@ second_hook_cb()
}
static gboolean
ssb_scuttler_send(SsbScuttler *scuttler, gpointer data, gsize data_len, GError **error)
ssb_scuttler_send_plain(SsbScuttler *scuttler, gpointer data, gsize data_len, GError **error)
{
GOutputStream *stream = g_io_stream_get_output_stream(G_IO_STREAM(scuttler->connection));
GError *err = NULL;
@ -362,7 +388,7 @@ ssb_scuttler_shs_connect(SsbScuttler *scuttler, GError **error)
memcpy(buf, local_app_mac, crypto_box_PUBLICKEYBYTES);
memcpy(buf + crypto_box_PUBLICKEYBYTES, kx_pk, crypto_box_PUBLICKEYBYTES);
if (!ssb_scuttler_send(scuttler, buf, sizeof(buf), &err)) {
if (!ssb_scuttler_send_plain(scuttler, buf, sizeof(buf), &err)) {
g_propagate_error(error, err);
return FALSE;
@ -438,7 +464,7 @@ ssb_scuttler_shs_connect(SsbScuttler *scuttler, GError **error)
return FALSE;
}
if (!ssb_scuttler_send(scuttler, boxed_auth, sizeof(boxed_auth), &err)) {
if (!ssb_scuttler_send_plain(scuttler, boxed_auth, sizeof(boxed_auth), &err)) {
g_propagate_error(error, err);
return FALSE;
@ -563,6 +589,153 @@ ssb_scuttler_connect(SsbScuttler *scuttler, GError **error)
return TRUE;
}
static void
increment_nonce(guchar nonce[24])
{
int i;
for (i = 23; (i >= 0) && (nonce[i] == 0xff); i--) {
nonce[i] = 0;
}
if (i >= 0) {
nonce[i]++;
}
}
static gboolean
ssb_scuttler_write_packet(SsbScuttler *scuttler, const guchar *data, guint16 data_len, GError **error)
{
gsize boxed_len = data_len + 34;
guchar boxed[boxed_len];
GError *err = NULL;
increment_nonce(scuttler->nonce2);
if (crypto_secretbox_easy(boxed + 18, data, data_len, scuttler->nonce2, scuttler->encrypt_key) < 0) {
g_set_error(error, SSB_SCUTTLER_ERROR, SSB_SCUTTLER_ERROR_SEND, "Failed to box packet data");
return FALSE;
}
BoxsHeader header;
header.len = g_htons(data_len);
memcpy(header.mac, boxed + 18, 16);
if (crypto_secretbox_easy(boxed, (guchar *)&header, 18, scuttler->nonce1, scuttler->encrypt_key) < 0) {
g_set_error(error, SSB_SCUTTLER_ERROR, SSB_SCUTTLER_ERROR_SEND, "Failed to box packet header");
return FALSE;
}
increment_nonce(scuttler->nonce1);
increment_nonce(scuttler->nonce1);
increment_nonce(scuttler->nonce2);
if (!ssb_scuttler_send_plain(scuttler, boxed, 34, &err)) {
g_propagate_error(error, err);
return FALSE;
}
return TRUE;
}
static gboolean
ssb_scuttler_send_bytes(SsbScuttler *scuttler, const guchar *data, gsize data_len, GError **error)
{
GError *err = NULL;
while(data_len > 0) {
gsize len = data_len > BOXS_MAXLEN ? BOXS_MAXLEN : data_len;
if (!ssb_scuttler_write_packet(scuttler, data, len, &err)) {
g_propagate_error(error, err);
return FALSE;
}
data_len -= len;
data += len;
}
return TRUE;
}
static gboolean
ssb_scuttler_send_packet(SsbScuttler *scuttler,
SsbPacketType type,
const gchar *data,
gsize data_len,
int request_id,
gboolean stream,
gboolean end,
GError **error)
{
gsize out_len = data_len + 9;
guchar out_buf[out_len];
PacketHeader header = {
g_htonl(data_len),
g_htonl(request_id)
};
GError *err = NULL;
out_buf[0] = (stream << 3) | (end << 2) | (type & 3);
memcpy(out_buf + 1, &header, 8);
memcpy(out_buf + 9, data, data_len);
if (!ssb_scuttler_send_bytes(scuttler, out_buf, out_len, &err)) {
g_propagate_error(error, err);
return FALSE;
}
return TRUE;
}
static void
ssb_scuttler_muxrpc_call(SsbScuttler *scuttler,
const gchar *method,
const gchar *argument,
SsbRPCType type,
const gchar *typestr,
int req_id,
GError **error)
{
gchar *request;
gsize request_len;
gboolean is_request = (type == SSB_RPC_ASYNC);
JsonObject *req_object = json_object_new();
JsonNode *req_node = json_node_new(JSON_NODE_OBJECT);
GError *err = NULL;
json_object_set_string_member(req_object, "name", method);
json_object_set_string_member(req_object, "args", argument);
if (!is_request) {
json_object_set_string_member(req_object, "type", typestr);
}
json_node_take_object(req_node, req_object);
request = json_to_string(req_node, FALSE);
json_node_free(req_node);
if ((request_len = strlen(request)) > MAX_MESSAGE_SIZE) {
g_set_error(error, SSB_SCUTTLER_ERROR, SSB_SCUTTLER_ERROR_REQUEST_TOO_LARGE, "Request too large");
return;
}zq
if (!ssb_scuttler_send_packet(scuttler, request, request_len, SSB_PACKET_TYPE_JSON, req_id, !is_request, FALSE, &err)) {
g_propagate_error(error, err);
return;
}
g_free(request);
}
static void
ssb_scuttler_dispose(GObject *gobject)
{

2
ssb-gtk/sbot.h
View File

@ -11,6 +11,8 @@ typedef enum {
SSB_SCUTTLER_ERROR_KEYAUTH,
SSB_SCUTTLER_ERROR_KEYVERIFY,
SSB_SCUTTLER_ERROR_AUTH,
SSB_SCUTTLER_ERROR_REQUEST_TOO_LARGE,
SSB_SCUTTLER_ERROR_SEND,
} SsbScuttlerError;
G_BEGIN_DECLS