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selinux: Add support for portcon dccp protocol

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This adds CIL and checkpolicy support for the (portcon dccp ...)
statement. The kernel already handles name_bind and name_connect
permissions for the dccp_socket class.

Signed-off-by: Richard Haines <richard_c_haines@btinternet.com>
Signed-off-by: James Carter <jwcart2@tycho.nsa.gov>
This commit is contained in:
Richard Haines 2016-04-06 12:44:35 +01:00 committed by James Carter
parent f5c0b471e9
commit 3895fbbe0c
14 changed files with 29 additions and 3 deletions
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2
checkpolicy/checkpolicy.c
View File

@ -919,6 +919,8 @@ int main(int argc, char **argv)
protocol = IPPROTO_TCP;
else if (!strcmp(ans, "udp") || !strcmp(ans, "UDP"))
protocol = IPPROTO_UDP;
else if (!strcmp(ans, "dccp") || !strcmp(ans, "DCCP"))
protocol = IPPROTO_DCCP;
else {
printf("unknown protocol\n");
break;

2
checkpolicy/policy_define.c
View File

@ -4876,6 +4876,8 @@ int define_port_context(unsigned int low, unsigned int high)
protocol = IPPROTO_TCP;
} else if ((strcmp(id, "udp") == 0) || (strcmp(id, "UDP") == 0)) {
protocol = IPPROTO_UDP;
} else if ((strcmp(id, "dccp") == 0) || (strcmp(id, "DCCP") == 0)) {
protocol = IPPROTO_DCCP;
} else {
yyerror2("unrecognized protocol %s", id);
free(newc);

1
libsepol/cil/src/cil.c
View File

@ -108,6 +108,7 @@ static void cil_init_keys(void)
CIL_KEY_STAR = cil_strpool_add("*");
CIL_KEY_UDP = cil_strpool_add("udp");
CIL_KEY_TCP = cil_strpool_add("tcp");
CIL_KEY_DCCP = cil_strpool_add("dccp");
CIL_KEY_AUDITALLOW = cil_strpool_add("auditallow");
CIL_KEY_TUNABLEIF = cil_strpool_add("tunableif");
CIL_KEY_ALLOW = cil_strpool_add("allow");

3
libsepol/cil/src/cil_binary.c
View File

@ -3035,6 +3035,9 @@ int cil_portcon_to_policydb(policydb_t *pdb, struct cil_sort *portcons)
case CIL_PROTOCOL_TCP:
new_ocon->u.port.protocol = IPPROTO_TCP;
break;
case CIL_PROTOCOL_DCCP:
new_ocon->u.port.protocol = IPPROTO_DCCP;
break;
default:
/* should not get here */
rc = SEPOL_ERR;

2
libsepol/cil/src/cil_build_ast.c
View File

@ -4261,6 +4261,8 @@ int cil_gen_portcon(struct cil_db *db, struct cil_tree_node *parse_current, stru
portcon->proto = CIL_PROTOCOL_UDP;
} else if (proto == CIL_KEY_TCP) {
portcon->proto = CIL_PROTOCOL_TCP;
} else if (proto == CIL_KEY_DCCP) {
portcon->proto = CIL_PROTOCOL_DCCP;
} else {
cil_log(CIL_ERR, "Invalid protocol\n");
rc = SEPOL_ERR;

4
libsepol/cil/src/cil_internal.h
View File

@ -101,6 +101,7 @@ char *CIL_KEY_OBJECT_R;
char *CIL_KEY_STAR;
char *CIL_KEY_TCP;
char *CIL_KEY_UDP;
char *CIL_KEY_DCCP;
char *CIL_KEY_AUDITALLOW;
char *CIL_KEY_TUNABLEIF;
char *CIL_KEY_ALLOW;
@ -713,7 +714,8 @@ struct cil_filecon {
enum cil_protocol {
CIL_PROTOCOL_UDP = 1,
CIL_PROTOCOL_TCP
CIL_PROTOCOL_TCP,
CIL_PROTOCOL_DCCP
};
struct cil_portcon {

2
libsepol/cil/src/cil_policy.c
View File

@ -123,6 +123,8 @@ int cil_portcon_to_policy(FILE **file_arr, struct cil_sort *sort)
fprintf(file_arr[NETIFCONS], "udp ");
} else if (portcon->proto == CIL_PROTOCOL_TCP) {
fprintf(file_arr[NETIFCONS], "tcp ");
} else if (portcon->proto == CIL_PROTOCOL_DCCP) {
fprintf(file_arr[NETIFCONS], "dccp ");
}
fprintf(file_arr[NETIFCONS], "%d ", portcon->port_low);
fprintf(file_arr[NETIFCONS], "%d ", portcon->port_high);

2
libsepol/cil/src/cil_tree.c
View File

@ -1319,6 +1319,8 @@ void cil_tree_print_node(struct cil_tree_node *node)
cil_log(CIL_INFO, " udp");
} else if (portcon->proto == CIL_PROTOCOL_TCP) {
cil_log(CIL_INFO, " tcp");
} else if (portcon->proto == CIL_PROTOCOL_DCCP) {
cil_log(CIL_INFO, " dccp");
}
cil_log(CIL_INFO, " (%d %d)", portcon->port_low, portcon->port_high);

1
libsepol/include/sepol/port_record.h
View File

@ -14,6 +14,7 @@ typedef struct sepol_port_key sepol_port_key_t;
#define SEPOL_PROTO_UDP 0
#define SEPOL_PROTO_TCP 1
#define SEPOL_PROTO_DCCP 2
/* Key */
extern int sepol_port_compare(const sepol_port_t * port,

1
libsepol/src/module_to_cil.c
View File

@ -2537,6 +2537,7 @@ static int ocontext_selinux_port_to_cil(struct policydb *pdb, struct ocontext *p
switch (portcon->u.port.protocol) {
case IPPROTO_TCP: protocol = "tcp"; break;
case IPPROTO_UDP: protocol = "udp"; break;
case IPPROTO_DCCP: protocol = "dccp"; break;
default:
log_err("Unknown portcon protocol: %i", portcon->u.port.protocol);
rc = -1;

2
libsepol/src/port_record.c
View File

@ -184,6 +184,8 @@ const char *sepol_port_get_proto_str(int proto)
return "udp";
case SEPOL_PROTO_TCP:
return "tcp";
case SEPOL_PROTO_DCCP:
return "dccp";
default:
return "???";
}

4
libsepol/src/ports.c
View File

@ -16,6 +16,8 @@ static inline int sepol2ipproto(sepol_handle_t * handle, int proto)
return IPPROTO_TCP;
case SEPOL_PROTO_UDP:
return IPPROTO_UDP;
case SEPOL_PROTO_DCCP:
return IPPROTO_DCCP;
default:
ERR(handle, "unsupported protocol %u", proto);
return STATUS_ERR;
@ -30,6 +32,8 @@ static inline int ipproto2sepol(sepol_handle_t * handle, int proto)
return SEPOL_PROTO_TCP;
case IPPROTO_UDP:
return SEPOL_PROTO_UDP;
case IPPROTO_DCCP:
return SEPOL_PROTO_DCCP;
default:
ERR(handle, "invalid protocol %u " "found in policy", proto);
return STATUS_ERR;

5
secilc/docs/cil_network_labeling_statements.md
View File

@ -155,7 +155,7 @@ These examples show named and anonymous [`nodecon`](cil_network_labeling_stateme
portcon
-------
Label a udp or tcp port.
Label a udp, tcp or dccp port.
**Statement definition:**
@ -175,7 +175,7 @@ Label a udp or tcp port.
</tr>
<tr class="even">
<td align="left"><p><code>protocol</code></p></td>
<td align="left"><p>The protocol keyword <code>tcp</code> or <code>udp</code>.</p></td>
<td align="left"><p>The protocol keyword <code>tcp</code>, <code>udp</code> or <code>dccp</code>.</p></td>
</tr>
<tr class="odd">
<td align="left"><p><code>port |</code></p>
@ -199,3 +199,4 @@ These examples show named and anonymous [`portcon`](cil_network_labeling_stateme
(portcon tcp 3333 (unconfined.user object_r unconfined.object levelrange_1))
(portcon udp 4444 (unconfined.user object_r unconfined.object ((s0) level_2)))
(portcon tcp (2000 20000) (unconfined.user object_r unconfined.object (systemlow level_3)))
(portcon dccp (6840 6880) (unconfined.user object_r unconfined.object ((s0) level_2)))

1
secilc/test/policy.cil
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@ -270,6 +270,7 @@
(nodecon ip_v6 netmask_v6 system_u_bin_t_l2h)
(portcon udp 25 system_u_bin_t_l2h)
(portcon tcp 22 system_u_bin_t_l2h)
(portcon dccp (2048 2096) system_u_bin_t_l2h)
(genfscon - "/usr/bin" system_u_bin_t_l2h)
(netifcon eth0 system_u_bin_t_l2h system_u_bin_t_l2h) ;different contexts?
(fsuse xattr ext3 system_u_bin_t_l2h)