From: Daniel Jurgens <danielj@xxxxxxxxxxxx>
Add support for reading, writing, and copying IB end port ocontext data.
Also add support for querying a IB end port sid to checkpolicy.
Signed-off-by: Daniel Jurgens <danielj@xxxxxxxxxxxx>
---
v1:
Stephen Smalley:
- Removed unused domain and type params from sepol_ibendport_sid.
- Remove ibendport initial sid from ocontext_selinux_isid_to_cil
- Check the length provide for the device name in ocontext_read_selinux
- Used strcmp for dev_name comparison.
James Carter:
- Added ibendport handling to kernel_to_cil.c and kernel_to_conf.c
Signed-off-by: Daniel Jurgens <danielj@xxxxxxxxxxxx>
---
checkpolicy/checkpolicy.c | 20 ++++++++++++++
libsepol/include/sepol/policydb/services.h | 8 ++++++
libsepol/src/expand.c | 8 ++++++
libsepol/src/kernel_to_cil.c | 42 ++++++++++++++++++++++++++++++
libsepol/src/kernel_to_conf.c | 41 +++++++++++++++++++++++++++++
libsepol/src/libsepol.map.in | 1 +
libsepol/src/module_to_cil.c | 14 ++++++++++
libsepol/src/policydb.c | 26 +++++++++++++++---
libsepol/src/services.c | 37 ++++++++++++++++++++++++++
libsepol/src/write.c | 14 ++++++++++
10 files changed, 208 insertions(+), 3 deletions(-)
diff --git a/checkpolicy/checkpolicy.c b/checkpolicy/checkpolicy.c
index d0e46ba..94bf083 100644
--- a/checkpolicy/checkpolicy.c
+++ b/checkpolicy/checkpolicy.c
@@ -701,6 +701,7 @@ int main(int argc, char **argv)
printf("i) display constraint expressions\n");
printf("j) display validatetrans expressions\n");
printf("k) Call ibpkey_sid\n");
+ printf("l) Call ibendport_sid\n");
#ifdef EQUIVTYPES
printf("z) Show equivalent types\n");
#endif
@@ -1245,6 +1246,25 @@ int main(int argc, char **argv)
printf("sid %d\n", ssid);
}
break;
+ case 'l':
+ printf("device name (eg. mlx4_0)? ");
+ FGETS(ans, sizeof(ans), stdin);
+ ans[strlen(ans) - 1] = 0;
+
+ name = malloc((strlen(ans) + 1) * sizeof(char));
+ if (!name) {
+ fprintf(stderr, "couldn't malloc string.\n");
+ break;
+ }
+ strcpy(name, ans);
+
+ printf("port? ");
+ FGETS(ans, sizeof(ans), stdin);
+ port = atoi(ans);
+ sepol_ibendport_sid(name, port, &ssid);
+ printf("sid %d\n", ssid);
+ free(name);
+ break;
#ifdef EQUIVTYPES
case 'z':
identify_equiv_types();
diff --git a/libsepol/include/sepol/policydb/services.h b/libsepol/include/sepol/policydb/services.h
index 459254e..e4f2f11 100644
--- a/libsepol/include/sepol/policydb/services.h
+++ b/libsepol/include/sepol/policydb/services.h
@@ -196,6 +196,14 @@ extern int sepol_ibpkey_sid(void *subnet_prefix_p,
sepol_security_id_t *out_sid);
/*
+ * Return the SID of the ibendport specified by
+ * `dev_name', and `port'.
+ */
+extern int sepol_ibendport_sid(char *dev_name,
+ uint8_t port,
+ sepol_security_id_t *out_sid);
+
+/*
* Return the SIDs to use for a network interface
* with the name `name'. The `if_sid' SID is returned for
* the interface and the `msg_sid' SID is returned as
diff --git a/libsepol/src/expand.c b/libsepol/src/expand.c
index c45ecbe..061945e 100644
--- a/libsepol/src/expand.c
+++ b/libsepol/src/expand.c
@@ -2226,6 +2226,14 @@ static int ocontext_copy_selinux(expand_state_t *state)
n->u.ibpkey.low_pkey = c->u.ibpkey.low_pkey;
n->u.ibpkey.high_pkey = c->u.ibpkey.high_pkey;
break;
+ case OCON_IBENDPORT:
+ n->u.ibendport.dev_name = strdup(c->u.ibendport.dev_name);
+ if (!n->u.ibendport.dev_name) {
+ ERR(state->handle, "Out of memory!");
+ return -1;
+ }
+ n->u.ibendport.port = c->u.ibendport.port;
+ break;
case OCON_PORT:
n->u.port.protocol = c->u.port.protocol;
n->u.port.low_port = c->u.port.low_port;
diff --git a/libsepol/src/kernel_to_cil.c b/libsepol/src/kernel_to_cil.c
index fcfd0e0..6587ff4 100644
--- a/libsepol/src/kernel_to_cil.c
+++ b/libsepol/src/kernel_to_cil.c
@@ -2837,6 +2837,43 @@ exit:
return rc;
}
+static int write_selinux_ibendport_rules_to_cil(FILE *out, struct policydb *pdb)
+{
+ struct ocontext *ibendportcon;
+ char port_str[4];
+ char *ctx;
+ int rc = 0;
+
+ for (ibendportcon = pdb->ocontexts[OCON_IBENDPORT];
+ ibendportcon != NULL; ibendportcon = ibendportcon->next) {
+ rc = snprintf(port_str, 4, "%u", ibendportcon->u.ibendport.port);
+ if (rc < 0 || rc >= 4) {
+ rc = -1;
+ goto exit;
+ }
+
+ ctx = context_to_str(pdb, &ibendportcon->context[0]);
+ if (!ctx) {
+ rc = -1;
+ goto exit;
+ }
+
+ sepol_printf(out, "(ibendportcon %s %s %s)\n",
+ ibendportcon->u.ibendport.dev_name, port_str, ctx);
+
+ free(ctx);
+ }
+
+ rc = 0;
+
+exit:
+ if (rc != 0) {
+ sepol_log_err("Error writing ibendportcon rules to CIL\n");
+ }
+
+ return rc;
+}
+
static int write_xen_isid_rules_to_cil(FILE *out, struct policydb *pdb)
{
return write_sid_context_rules_to_cil(out, pdb, xen_sid_to_str);
@@ -3238,6 +3275,11 @@ int sepol_kernel_policydb_to_cil(FILE *out, struct policydb *pdb)
if (rc != 0) {
goto exit;
}
+
+ rc = write_selinux_ibendport_rules_to_cil(out, pdb);
+ if (rc != 0) {
+ goto exit;
+ }
} else if (pdb->target_platform == SEPOL_TARGET_XEN) {
rc = write_xen_isid_rules_to_cil(out, pdb);
if (rc != 0) {
diff --git a/libsepol/src/kernel_to_conf.c b/libsepol/src/kernel_to_conf.c
index 795cf56..ba261cf 100644
--- a/libsepol/src/kernel_to_conf.c
+++ b/libsepol/src/kernel_to_conf.c
@@ -2699,6 +2699,42 @@ exit:
return rc;
}
+static int write_selinux_ibendport_rules_to_conf(FILE *out, struct policydb *pdb)
+{
+ struct ocontext *ibendportcon;
+ char port_str[4];
+ char *ctx;
+ int rc = 0;
+
+ for (ibendportcon = pdb->ocontexts[OCON_IBENDPORT];
+ ibendportcon != NULL; ibendportcon = ibendportcon->next) {
+ rc = snprintf(port_str, 4, "%u", ibendportcon->u.ibendport.port);
+ if (rc < 0 || rc >= 4) {
+ rc = -1;
+ goto exit;
+ }
+
+ ctx = context_to_str(pdb, &ibendportcon->context[0]);
+ if (!ctx) {
+ rc = -1;
+ goto exit;
+ }
+
+ sepol_printf(out, "ibendportcon %s %s %s\n", ibendportcon->u.ibendport.dev_name, port_str, ctx);
+
+ free(ctx);
+ }
+
+ rc = 0;
+
+exit:
+ if (rc != 0) {
+ sepol_log_err("Error writing ibendportcon rules to policy.conf\n");
+ }
+
+ return rc;
+}
+
static int write_xen_isid_rules_to_conf(FILE *out, struct policydb *pdb)
{
return write_sid_context_rules_to_conf(out, pdb, xen_sid_to_str);
@@ -3104,6 +3140,11 @@ int sepol_kernel_policydb_to_conf(FILE *out, struct policydb *pdb)
if (rc != 0) {
goto exit;
}
+
+ rc = write_selinux_ibendport_rules_to_conf(out, pdb);
+ if (rc != 0) {
+ goto exit;
+ }
} else if (pdb->target_platform == SEPOL_TARGET_XEN) {
rc = write_xen_isid_rules_to_conf(out, pdb);
if (rc != 0) {
diff --git a/libsepol/src/libsepol.map.in b/libsepol/src/libsepol.map.in
index 36225d1..dd1fec2 100644
--- a/libsepol/src/libsepol.map.in
+++ b/libsepol/src/libsepol.map.in
@@ -7,6 +7,7 @@ LIBSEPOL_1.0 {
sepol_iface_*;
sepol_port_*;
sepol_ibpkey_*;
+ sepol_ibendport_*;
sepol_node_*;
sepol_user_*; sepol_genusers; sepol_set_delusers;
sepol_msg_*; sepol_debug;
diff --git a/libsepol/src/module_to_cil.c b/libsepol/src/module_to_cil.c
index c97f453..04394f0 100644
--- a/libsepol/src/module_to_cil.c
+++ b/libsepol/src/module_to_cil.c
@@ -2773,6 +2773,19 @@ exit:
return rc;
}
+static int ocontext_selinux_ibendport_to_cil(struct policydb *pdb, struct ocontext *ibendports)
+{
+ struct ocontext *ibendport;
+
+ for (ibendport = ibendports; ibendport; ibendport = ibendport->next) {
+ cil_printf("(ibendportcon %s %u ", ibendport->u.ibendport.dev_name, ibendport->u.ibendport.port);
+ context_to_cil(pdb, &ibendport->context[0]);
+
+ cil_printf(")\n");
+ }
+
+ return 0;
+}
static int ocontext_selinux_fsuse_to_cil(struct policydb *pdb, struct ocontext *fsuses)
{
@@ -2927,6 +2940,7 @@ static int ocontexts_to_cil(struct policydb *pdb)
ocontext_selinux_fsuse_to_cil,
ocontext_selinux_node6_to_cil,
ocontext_selinux_ibpkey_to_cil,
+ ocontext_selinux_ibendport_to_cil,
};
static int (*ocon_xen_funcs[OCON_NUM])(struct policydb *pdb, struct ocontext *ocon) = {
ocontext_xen_isid_to_cil,
diff --git a/libsepol/src/policydb.c b/libsepol/src/policydb.c
index d6e8e6f..9a11d45 100644
--- a/libsepol/src/policydb.c
+++ b/libsepol/src/policydb.c
@@ -190,7 +190,7 @@ static struct policydb_compat_info policydb_compat[] = {
.type = POLICY_KERN,
.version = POLICYDB_VERSION_INFINIBAND,
.sym_num = SYM_NUM,
- .ocon_num = OCON_IBPKEY + 1,
+ .ocon_num = OCON_IBENDPORT + 1,
.target_platform = SEPOL_TARGET_SELINUX,
},
{
@@ -295,7 +295,7 @@ static struct policydb_compat_info policydb_compat[] = {
.type = POLICY_BASE,
.version = MOD_POLICYDB_VERSION_INFINIBAND,
.sym_num = SYM_NUM,
- .ocon_num = OCON_IBPKEY + 1,
+ .ocon_num = OCON_IBENDPORT + 1,
.target_platform = SEPOL_TARGET_SELINUX,
},
{
@@ -2788,7 +2788,7 @@ static int ocontext_read_selinux(struct policydb_compat_info *info,
if (rc < 0)
return -1;
len = le32_to_cpu(buf[0]);
- if (zero_or_saturated(len))
+ if (zero_or_saturated(len) || len > 63)
return -1;
c->u.name = malloc(len + 1);
if (!c->u.name)
@@ -2819,6 +2819,26 @@ static int ocontext_read_selinux(struct policydb_compat_info *info,
(&c->context[0], p, fp))
return -1;
break;
+ case OCON_IBENDPORT:
+ rc = next_entry(buf, fp, sizeof(uint32_t) * 2);
+ if (rc < 0)
+ return -1;
+ len = le32_to_cpu(buf[0]);
+ if (len == 0 || len > IB_DEVICE_NAME_MAX - 1)
+ return -1;
+
+ c->u.ibendport.dev_name = malloc(len + 1);
+ if (!c->u.ibendport.dev_name)
+ return -1;
+ rc = next_entry(c->u.ibendport.dev_name, fp, len);
+ if (rc < 0)
+ return -1;
+ c->u.ibendport.dev_name[len] = 0;
+ c->u.ibendport.port = le32_to_cpu(buf[1]);
+ if (context_read_and_validate
+ (&c->context[0], p, fp))
+ return -1;
+ break;
case OCON_PORT:
rc = next_entry(buf, fp, sizeof(uint32_t) * 3);
if (rc < 0)
diff --git a/libsepol/src/services.c b/libsepol/src/services.c
index 4236aac..f444f10 100644
--- a/libsepol/src/services.c
+++ b/libsepol/src/services.c
@@ -1962,6 +1962,43 @@ out:
}
/*
+ * Return the SID of the subnet management interface specified by
+ * `device name', and `port'.
+ */
+int hidden sepol_ibendport_sid(char *dev_name,
+ uint8_t port,
+ sepol_security_id_t *out_sid)
+{
+ ocontext_t *c;
+ int rc = 0;
+
+ c = policydb->ocontexts[OCON_IBENDPORT];
+ while (c) {
+ if (c->u.ibendport.port == port &&
+ !strcmp(dev_name, c->u.ibendport.dev_name))
+ break;
+ c = c->next;
+ }
+
+ if (c) {
+ if (!c->sid[0]) {
+ rc = sepol_sidtab_context_to_sid(sidtab,
+ &c->context[0],
+ &c->sid[0]);
+ if (rc)
+ goto out;
+ }
+ *out_sid = c->sid[0];
+ } else {
+ *out_sid = SECINITSID_UNLABELED;
+ }
+
+out:
+ return rc;
+}
+
+
+/*
* Return the SID of the port specified by
* `domain', `type', `protocol', and `port'.
*/
diff --git a/libsepol/src/write.c b/libsepol/src/write.c
index fa1b7d1..e3ff389 100644
--- a/libsepol/src/write.c
+++ b/libsepol/src/write.c
@@ -1426,6 +1426,20 @@ static int ocontext_write_selinux(struct policydb_compat_info *info,
if (context_write(p, &c->context[0], fp))
return POLICYDB_ERROR;
break;
+ case OCON_IBENDPORT:
+ len = strlen(c->u.ibendport.dev_name);
+ buf[0] = cpu_to_le32(len);
+ buf[1] = cpu_to_le32(c->u.ibendport.port);
+ items = put_entry(buf, sizeof(uint32_t), 2, fp);
+ if (items != 2)
+ return POLICYDB_ERROR;
+ items = put_entry(c->u.ibendport.dev_name, 1, len, fp);
+ if (items != len)
+ return POLICYDB_ERROR;
+
+ if (context_write(p, &c->context[0], fp))
+ return POLICYDB_ERROR;
+ break;
case OCON_PORT:
buf[0] = c->u.port.protocol;
buf[1] = c->u.port.low_port;
--
2.7.4
