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TOMOYO: Add socket operation restriction support.

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This patch adds support for permission checks for PF_INET/PF_INET6/PF_UNIX
socket's bind()/listen()/connect()/send() operations.

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: James Morris <jmorris@namei.org>
This commit is contained in:
Tetsuo Handa
2011-09-10 15:23:54 +09:00
committed by James Morris
parent d58e0da854
commit 059d84dbb3
10 changed files with 1215 additions and 17 deletions
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104
security/tomoyo/common.c
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@@ -44,10 +44,27 @@ const char * const tomoyo_mac_keywords[TOMOYO_MAX_MAC_INDEX
[TOMOYO_MAC_FILE_MOUNT] = "mount",
[TOMOYO_MAC_FILE_UMOUNT] = "unmount",
[TOMOYO_MAC_FILE_PIVOT_ROOT] = "pivot_root",
/* CONFIG::network group */
[TOMOYO_MAC_NETWORK_INET_STREAM_BIND] = "inet_stream_bind",
[TOMOYO_MAC_NETWORK_INET_STREAM_LISTEN] = "inet_stream_listen",
[TOMOYO_MAC_NETWORK_INET_STREAM_CONNECT] = "inet_stream_connect",
[TOMOYO_MAC_NETWORK_INET_DGRAM_BIND] = "inet_dgram_bind",
[TOMOYO_MAC_NETWORK_INET_DGRAM_SEND] = "inet_dgram_send",
[TOMOYO_MAC_NETWORK_INET_RAW_BIND] = "inet_raw_bind",
[TOMOYO_MAC_NETWORK_INET_RAW_SEND] = "inet_raw_send",
[TOMOYO_MAC_NETWORK_UNIX_STREAM_BIND] = "unix_stream_bind",
[TOMOYO_MAC_NETWORK_UNIX_STREAM_LISTEN] = "unix_stream_listen",
[TOMOYO_MAC_NETWORK_UNIX_STREAM_CONNECT] = "unix_stream_connect",
[TOMOYO_MAC_NETWORK_UNIX_DGRAM_BIND] = "unix_dgram_bind",
[TOMOYO_MAC_NETWORK_UNIX_DGRAM_SEND] = "unix_dgram_send",
[TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_BIND] = "unix_seqpacket_bind",
[TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_LISTEN] = "unix_seqpacket_listen",
[TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_CONNECT] = "unix_seqpacket_connect",
/* CONFIG::misc group */
[TOMOYO_MAC_ENVIRON] = "env",
/* CONFIG group */
[TOMOYO_MAX_MAC_INDEX + TOMOYO_MAC_CATEGORY_FILE] = "file",
[TOMOYO_MAX_MAC_INDEX + TOMOYO_MAC_CATEGORY_NETWORK] = "network",
[TOMOYO_MAX_MAC_INDEX + TOMOYO_MAC_CATEGORY_MISC] = "misc",
};
@@ -135,11 +152,20 @@ const char * const tomoyo_path_keyword[TOMOYO_MAX_PATH_OPERATION] = {
[TOMOYO_TYPE_UMOUNT] = "unmount",
};
/* String table for socket's operation. */
const char * const tomoyo_socket_keyword[TOMOYO_MAX_NETWORK_OPERATION] = {
[TOMOYO_NETWORK_BIND] = "bind",
[TOMOYO_NETWORK_LISTEN] = "listen",
[TOMOYO_NETWORK_CONNECT] = "connect",
[TOMOYO_NETWORK_SEND] = "send",
};
/* String table for categories. */
static const char * const tomoyo_category_keywords
[TOMOYO_MAX_MAC_CATEGORY_INDEX] = {
[TOMOYO_MAC_CATEGORY_FILE] = "file",
[TOMOYO_MAC_CATEGORY_MISC] = "misc",
[TOMOYO_MAC_CATEGORY_FILE] = "file",
[TOMOYO_MAC_CATEGORY_NETWORK] = "network",
[TOMOYO_MAC_CATEGORY_MISC] = "misc",
};
/* Permit policy management by non-root user? */
@@ -1042,8 +1068,10 @@ static int tomoyo_write_domain2(struct tomoyo_policy_namespace *ns,
static const struct {
const char *keyword;
int (*write) (struct tomoyo_acl_param *);
} tomoyo_callback[2] = {
} tomoyo_callback[4] = {
{ "file ", tomoyo_write_file },
{ "network inet ", tomoyo_write_inet_network },
{ "network unix ", tomoyo_write_unix_network },
{ "misc ", tomoyo_write_misc },
};
u8 i;
@@ -1375,6 +1403,60 @@ static bool tomoyo_print_entry(struct tomoyo_io_buffer *head,
tomoyo_print_number_union(head, &ptr->mode);
tomoyo_print_number_union(head, &ptr->major);
tomoyo_print_number_union(head, &ptr->minor);
} else if (acl_type == TOMOYO_TYPE_INET_ACL) {
struct tomoyo_inet_acl *ptr =
container_of(acl, typeof(*ptr), head);
const u8 perm = ptr->perm;
for (bit = 0; bit < TOMOYO_MAX_NETWORK_OPERATION; bit++) {
if (!(perm & (1 << bit)))
continue;
if (first) {
tomoyo_set_group(head, "network inet ");
tomoyo_set_string(head, tomoyo_proto_keyword
[ptr->protocol]);
tomoyo_set_space(head);
first = false;
} else {
tomoyo_set_slash(head);
}
tomoyo_set_string(head, tomoyo_socket_keyword[bit]);
}
if (first)
return true;
tomoyo_set_space(head);
if (ptr->address.group) {
tomoyo_set_string(head, "@");
tomoyo_set_string(head, ptr->address.group->group_name
->name);
} else {
char buf[128];
tomoyo_print_ip(buf, sizeof(buf), &ptr->address);
tomoyo_io_printf(head, "%s", buf);
}
tomoyo_print_number_union(head, &ptr->port);
} else if (acl_type == TOMOYO_TYPE_UNIX_ACL) {
struct tomoyo_unix_acl *ptr =
container_of(acl, typeof(*ptr), head);
const u8 perm = ptr->perm;
for (bit = 0; bit < TOMOYO_MAX_NETWORK_OPERATION; bit++) {
if (!(perm & (1 << bit)))
continue;
if (first) {
tomoyo_set_group(head, "network unix ");
tomoyo_set_string(head, tomoyo_proto_keyword
[ptr->protocol]);
tomoyo_set_space(head);
first = false;
} else {
tomoyo_set_slash(head);
}
tomoyo_set_string(head, tomoyo_socket_keyword[bit]);
}
if (first)
return true;
tomoyo_print_name_union(head, &ptr->name);
} else if (acl_type == TOMOYO_TYPE_MOUNT_ACL) {
struct tomoyo_mount_acl *ptr =
container_of(acl, typeof(*ptr), head);
@@ -1548,8 +1630,9 @@ static const char *tomoyo_transition_type[TOMOYO_MAX_TRANSITION_TYPE] = {
/* String table for grouping keywords. */
static const char *tomoyo_group_name[TOMOYO_MAX_GROUP] = {
[TOMOYO_PATH_GROUP] = "path_group ",
[TOMOYO_NUMBER_GROUP] = "number_group ",
[TOMOYO_PATH_GROUP] = "path_group ",
[TOMOYO_NUMBER_GROUP] = "number_group ",
[TOMOYO_ADDRESS_GROUP] = "address_group ",
};
/**
@@ -1591,7 +1674,7 @@ static int tomoyo_write_exception(struct tomoyo_io_buffer *head)
}
/**
* tomoyo_read_group - Read "struct tomoyo_path_group"/"struct tomoyo_number_group" list.
* tomoyo_read_group - Read "struct tomoyo_path_group"/"struct tomoyo_number_group"/"struct tomoyo_address_group" list.
*
* @head: Pointer to "struct tomoyo_io_buffer".
* @idx: Index number.
@@ -1628,6 +1711,15 @@ static bool tomoyo_read_group(struct tomoyo_io_buffer *head, const int idx)
(ptr,
struct tomoyo_number_group,
head)->number);
} else if (idx == TOMOYO_ADDRESS_GROUP) {
char buffer[128];
struct tomoyo_address_group *member =
container_of(ptr, typeof(*member),
head);
tomoyo_print_ip(buffer, sizeof(buffer),
&member->address);
tomoyo_io_printf(head, " %s", buffer);
}
tomoyo_set_lf(head);
}