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gdbusauth: empty DATA does not need a trailing space

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This is an interoperability fix. If the line is exactly "DATA\r\n",
the reference implementation of D-Bus treats this as equivalent to
"DATA \r\n", meaning the data block consists of zero hex-encoded bytes.
In practice, D-Bus clients send empty data blocks as "DATA\r\n", and
in fact sd-bus only accepts that, rejecting "DATA \r\n".

[Originally part of a larger commit; commit message added by smcv]

Signed-off-by: Giuseppe Scrivano <giuseppe@scrivano.org>
Co-authored-by: Simon McVittie <smcv@collabora.com>
Signed-off-by: Simon McVittie <smcv@collabora.com>
This commit is contained in:
Giuseppe Scrivano 2020-09-14 16:28:10 +02:00 committed by Simon McVittie
parent edcedd86d7
commit 764f071909
1 changed files with 4 additions and 4 deletions
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8
gio/gdbusauth.c
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@ -783,13 +783,13 @@ _g_dbus_auth_run_client (GDBusAuth *auth,
if (line == NULL)
goto out;
debug_print ("CLIENT: WaitingForData, read='%s'", line);
if (g_str_has_prefix (line, "DATA "))
if (g_str_equal (line, "DATA") || g_str_has_prefix (line, "DATA "))
{
gchar *encoded;
gchar *decoded_data;
gsize decoded_data_len = 0;
encoded = g_strdup (line + 5);
encoded = g_strdup (line + 4);
g_free (line);
g_strstrip (encoded);
decoded_data = hexdecode (encoded, &decoded_data_len, error);
@ -1255,13 +1255,13 @@ _g_dbus_auth_run_server (GDBusAuth *auth,
debug_print ("SERVER: WaitingForData, read '%s'", line);
if (line == NULL)
goto out;
if (g_str_has_prefix (line, "DATA "))
if (g_str_equal (line, "DATA") || g_str_has_prefix (line, "DATA "))
{
gchar *encoded;
gchar *decoded_data;
gsize decoded_data_len = 0;
encoded = g_strdup (line + 5);
encoded = g_strdup (line + 4);
g_free (line);
g_strstrip (encoded);
decoded_data = hexdecode (encoded, &decoded_data_len, error);