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core: use nm_utils_machine_id_read() in "nm-dhcp-client.c"

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(cherry picked from commit 54233b6f3b)
This commit is contained in:
Thomas Haller 2016-04-25 21:23:44 +02:00
parent 33d75792c3
commit fd82e00f2f
1 changed files with 9 additions and 47 deletions
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56
src/dhcp-manager/nm-dhcp-client.c
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@ -436,37 +436,10 @@ nm_dhcp_client_start_ip4 (NMDhcpClient *self,
return NM_DHCP_CLIENT_GET_CLASS (self)->ip4_start (self, dhcp_anycast_addr, last_ip4_address);
}
/* uuid_parse does not work for machine-id, so we use our own converter */
static gboolean
machine_id_parse (const char *in, uuid_t uu)
{
const char *cp;
int i;
char buf[3];
g_return_val_if_fail (in != NULL, FALSE);
g_return_val_if_fail (strlen (in) == 32, FALSE);
for (i = 0; i < 32; i++) {
if (!g_ascii_isxdigit (in[i]))
return FALSE;
}
buf[2] = 0;
cp = in;
for (i = 0; i < 16; i++) {
buf[0] = *cp++;
buf[1] = *cp++;
uu[i] = ((unsigned char) strtoul (buf, NULL, 16)) & 0xFF;
}
return TRUE;
}
static GByteArray *
generate_duid_from_machine_id (void)
{
GByteArray *duid;
char *contents = NULL;
GChecksum *sum;
guint8 buffer[32]; /* SHA256 digest size */
gsize sumlen = sizeof (buffer);
@ -474,27 +447,16 @@ generate_duid_from_machine_id (void)
uuid_t uuid;
GRand *generator;
guint i;
gboolean success = FALSE;
gs_free char *machine_id_s = NULL;
/* Get the machine ID from /etc/machine-id; it's always in /etc no matter
* where our configured SYSCONFDIR is. Alternatively, it might be in
* LOCALSTATEDIR /lib/dbus/machine-id.
*/
if ( g_file_get_contents ("/etc/machine-id", &contents, NULL, NULL)
|| g_file_get_contents (LOCALSTATEDIR "/lib/dbus/machine-id", &contents, NULL, NULL)) {
contents = g_strstrip (contents);
success = machine_id_parse (contents, uuid);
if (success) {
/* Hash the machine ID so it's not leaked to the network */
sum = g_checksum_new (G_CHECKSUM_SHA256);
g_checksum_update (sum, (const guchar *) &uuid, sizeof (uuid));
g_checksum_get_digest (sum, buffer, &sumlen);
g_checksum_free (sum);
}
g_free (contents);
}
if (!success) {
machine_id_s = nm_utils_machine_id_read ();
if (nm_utils_machine_id_parse (machine_id_s, uuid)) {
/* Hash the machine ID so it's not leaked to the network */
sum = g_checksum_new (G_CHECKSUM_SHA256);
g_checksum_update (sum, (const guchar *) &uuid, sizeof (uuid));
g_checksum_get_digest (sum, buffer, &sumlen);
g_checksum_free (sum);
} else {
nm_log_warn (LOGD_DHCP6, "dhcp6: failed to read " SYSCONFDIR "/machine-id "
"or " LOCALSTATEDIR "/lib/dbus/machine-id to generate "
"DHCPv6 DUID; creating non-persistent random DUID.");