Release 4.11 net/ipv4/cipso_ipv4.c
/*
* CIPSO - Commercial IP Security Option
*
* This is an implementation of the CIPSO 2.2 protocol as specified in
* draft-ietf-cipso-ipsecurity-01.txt with additional tag types as found in
* FIPS-188. While CIPSO never became a full IETF RFC standard many vendors
* have chosen to adopt the protocol and over the years it has become a
* de-facto standard for labeled networking.
*
* The CIPSO draft specification can be found in the kernel's Documentation
* directory as well as the following URL:
* http://tools.ietf.org/id/draft-ietf-cipso-ipsecurity-01.txt
* The FIPS-188 specification can be found at the following URL:
* http://www.itl.nist.gov/fipspubs/fip188.htm
*
* Author: Paul Moore <paul.moore@hp.com>
*
*/
/*
* (c) Copyright Hewlett-Packard Development Company, L.P., 2006, 2008
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
* the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*
*/
#include <linux/init.h>
#include <linux/types.h>
#include <linux/rcupdate.h>
#include <linux/list.h>
#include <linux/spinlock.h>
#include <linux/string.h>
#include <linux/jhash.h>
#include <linux/audit.h>
#include <linux/slab.h>
#include <net/ip.h>
#include <net/icmp.h>
#include <net/tcp.h>
#include <net/netlabel.h>
#include <net/cipso_ipv4.h>
#include <linux/atomic.h>
#include <linux/bug.h>
#include <asm/unaligned.h>
/* List of available DOI definitions */
/* XXX - This currently assumes a minimal number of different DOIs in use,
* if in practice there are a lot of different DOIs this list should
* probably be turned into a hash table or something similar so we
* can do quick lookups. */
static DEFINE_SPINLOCK(cipso_v4_doi_list_lock);
static LIST_HEAD(cipso_v4_doi_list);
/* Label mapping cache */
int cipso_v4_cache_enabled = 1;
int cipso_v4_cache_bucketsize = 10;
#define CIPSO_V4_CACHE_BUCKETBITS 7
#define CIPSO_V4_CACHE_BUCKETS (1 << CIPSO_V4_CACHE_BUCKETBITS)
#define CIPSO_V4_CACHE_REORDERLIMIT 10
struct cipso_v4_map_cache_bkt {
spinlock_t lock;
u32 size;
struct list_head list;
};
struct cipso_v4_map_cache_entry {
u32 hash;
unsigned char *key;
size_t key_len;
struct netlbl_lsm_cache *lsm_data;
u32 activity;
struct list_head list;
};
static struct cipso_v4_map_cache_bkt *cipso_v4_cache;
/* Restricted bitmap (tag #1) flags */
int cipso_v4_rbm_optfmt = 0;
int cipso_v4_rbm_strictvalid = 1;
/*
* Protocol Constants
*/
/* Maximum size of the CIPSO IP option, derived from the fact that the maximum
* IPv4 header size is 60 bytes and the base IPv4 header is 20 bytes long. */
#define CIPSO_V4_OPT_LEN_MAX 40
/* Length of the base CIPSO option, this includes the option type (1 byte), the
* option length (1 byte), and the DOI (4 bytes). */
#define CIPSO_V4_HDR_LEN 6
/* Base length of the restrictive category bitmap tag (tag #1). */
#define CIPSO_V4_TAG_RBM_BLEN 4
/* Base length of the enumerated category tag (tag #2). */
#define CIPSO_V4_TAG_ENUM_BLEN 4
/* Base length of the ranged categories bitmap tag (tag #5). */
#define CIPSO_V4_TAG_RNG_BLEN 4
/* The maximum number of category ranges permitted in the ranged category tag
* (tag #5). You may note that the IETF draft states that the maximum number
* of category ranges is 7, but if the low end of the last category range is
* zero then it is possible to fit 8 category ranges because the zero should
* be omitted. */
#define CIPSO_V4_TAG_RNG_CAT_MAX 8
/* Base length of the local tag (non-standard tag).
* Tag definition (may change between kernel versions)
*
* 0 8 16 24 32
* +----------+----------+----------+----------+
* | 10000000 | 00000110 | 32-bit secid value |
* +----------+----------+----------+----------+
* | in (host byte order)|
* +----------+----------+
*
*/
#define CIPSO_V4_TAG_LOC_BLEN 6
/*
* Helper Functions
*/
/**
* cipso_v4_cache_entry_free - Frees a cache entry
* @entry: the entry to free
*
* Description:
* This function frees the memory associated with a cache entry including the
* LSM cache data if there are no longer any users, i.e. reference count == 0.
*
*/
static void cipso_v4_cache_entry_free(struct cipso_v4_map_cache_entry *entry)
{
if (entry->lsm_data)
netlbl_secattr_cache_free(entry->lsm_data);
kfree(entry->key);
kfree(entry);
}
Contributors
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Paul Moore | 36 | 100.00% | 2 | 100.00% |
Total | 36 | 100.00% | 2 | 100.00% |
/**
* cipso_v4_map_cache_hash - Hashing function for the CIPSO cache
* @key: the hash key
* @key_len: the length of the key in bytes
*
* Description:
* The CIPSO tag hashing function. Returns a 32-bit hash value.
*
*/
static u32 cipso_v4_map_cache_hash(const unsigned char *key, u32 key_len)
{
return jhash(key, key_len, 0);
}
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Total | 25 | 100.00% | 1 | 100.00% |
/*
* Label Mapping Cache Functions
*/
/**
* cipso_v4_cache_init - Initialize the CIPSO cache
*
* Description:
* Initializes the CIPSO label mapping cache, this function should be called
* before any of the other functions defined in this file. Returns zero on
* success, negative values on error.
*
*/
static int __init cipso_v4_cache_init(void)
{
u32 iter;
cipso_v4_cache = kcalloc(CIPSO_V4_CACHE_BUCKETS,
sizeof(struct cipso_v4_map_cache_bkt),
GFP_KERNEL);
if (!cipso_v4_cache)
return -ENOMEM;
for (iter = 0; iter < CIPSO_V4_CACHE_BUCKETS; iter++) {
spin_lock_init(&cipso_v4_cache[iter].lock);
cipso_v4_cache[iter].size = 0;
INIT_LIST_HEAD(&cipso_v4_cache[iter].list);
}
return 0;
}
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Paul Moore | 83 | 97.65% | 1 | 33.33% |
Ian Morris | 1 | 1.18% | 1 | 33.33% |
Fabian Frederick | 1 | 1.18% | 1 | 33.33% |
Total | 85 | 100.00% | 3 | 100.00% |
/**
* cipso_v4_cache_invalidate - Invalidates the current CIPSO cache
*
* Description:
* Invalidates and frees any entries in the CIPSO cache. Returns zero on
* success and negative values on failure.
*
*/
void cipso_v4_cache_invalidate(void)
{
struct cipso_v4_map_cache_entry *entry, *tmp_entry;
u32 iter;
for (iter = 0; iter < CIPSO_V4_CACHE_BUCKETS; iter++) {
spin_lock_bh(&cipso_v4_cache[iter].lock);
list_for_each_entry_safe(entry,
tmp_entry,
&cipso_v4_cache[iter].list, list) {
list_del(&entry->list);
cipso_v4_cache_entry_free(entry);
}
cipso_v4_cache[iter].size = 0;
spin_unlock_bh(&cipso_v4_cache[iter].lock);
}
}
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Paul Moore | 89 | 100.00% | 2 | 100.00% |
Total | 89 | 100.00% | 2 | 100.00% |
/**
* cipso_v4_cache_check - Check the CIPSO cache for a label mapping
* @key: the buffer to check
* @key_len: buffer length in bytes
* @secattr: the security attribute struct to use
*
* Description:
* This function checks the cache to see if a label mapping already exists for
* the given key. If there is a match then the cache is adjusted and the
* @secattr struct is populated with the correct LSM security attributes. The
* cache is adjusted in the following manner if the entry is not already the
* first in the cache bucket:
*
* 1. The cache entry's activity counter is incremented
* 2. The previous (higher ranking) entry's activity counter is decremented
* 3. If the difference between the two activity counters is geater than
* CIPSO_V4_CACHE_REORDERLIMIT the two entries are swapped
*
* Returns zero on success, -ENOENT for a cache miss, and other negative values
* on error.
*
*/
static int cipso_v4_cache_check(const unsigned char *key,
u32 key_len,
struct netlbl_lsm_secattr *secattr)
{
u32 bkt;
struct cipso_v4_map_cache_entry *entry;
struct cipso_v4_map_cache_entry *prev_entry = NULL;
u32 hash;
if (!cipso_v4_cache_enabled)
return -ENOENT;
hash = cipso_v4_map_cache_hash(key, key_len);
bkt = hash & (CIPSO_V4_CACHE_BUCKETS - 1);
spin_lock_bh(&cipso_v4_cache[bkt].lock);
list_for_each_entry(entry, &cipso_v4_cache[bkt].list, list) {
if (entry->hash == hash &&
entry->key_len == key_len &&
memcmp(entry->key, key, key_len) == 0) {
entry->activity += 1;
atomic_inc(&entry->lsm_data->refcount);
secattr->cache = entry->lsm_data;
secattr->flags |= NETLBL_SECATTR_CACHE;
secattr->type = NETLBL_NLTYPE_CIPSOV4;
if (!prev_entry) {
spin_unlock_bh(&cipso_v4_cache[bkt].lock);
return 0;
}
if (prev_entry->activity > 0)
prev_entry->activity -= 1;
if (entry->activity > prev_entry->activity &&
entry->activity - prev_entry->activity >
CIPSO_V4_CACHE_REORDERLIMIT) {
__list_del(entry->list.prev, entry->list.next);
__list_add(&entry->list,
prev_entry->list.prev,
&prev_entry->list);
}
spin_unlock_bh(&cipso_v4_cache[bkt].lock);
return 0;
}
prev_entry = entry;
}
spin_unlock_bh(&cipso_v4_cache[bkt].lock);
return -ENOENT;
}
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Person | Tokens | Prop | Commits | CommitProp |
Paul Moore | 274 | 99.28% | 5 | 71.43% |
Pavel Emelyanov | 1 | 0.36% | 1 | 14.29% |
Ian Morris | 1 | 0.36% | 1 | 14.29% |
Total | 276 | 100.00% | 7 | 100.00% |
/**
* cipso_v4_cache_add - Add an entry to the CIPSO cache
* @skb: the packet
* @secattr: the packet's security attributes
*
* Description:
* Add a new entry into the CIPSO label mapping cache. Add the new entry to
* head of the cache bucket's list, if the cache bucket is out of room remove
* the last entry in the list first. It is important to note that there is
* currently no checking for duplicate keys. Returns zero on success,
* negative values on failure.
*
*/
int cipso_v4_cache_add(const unsigned char *cipso_ptr,
const struct netlbl_lsm_secattr *secattr)
{
int ret_val = -EPERM;
u32 bkt;
struct cipso_v4_map_cache_entry *entry = NULL;
struct cipso_v4_map_cache_entry *old_entry = NULL;
u32 cipso_ptr_len;
if (!cipso_v4_cache_enabled || cipso_v4_cache_bucketsize <= 0)
return 0;
cipso_ptr_len = cipso_ptr[1];
entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
if (!entry)
return -ENOMEM;
entry->key = kmemdup(cipso_ptr, cipso_ptr_len, GFP_ATOMIC);
if (!entry->key) {
ret_val = -ENOMEM;
goto cache_add_failure;
}
entry->key_len = cipso_ptr_len;
entry->hash = cipso_v4_map_cache_hash(cipso_ptr, cipso_ptr_len);
atomic_inc(&secattr->cache->refcount);
entry->lsm_data = secattr->cache;
bkt = entry->hash & (CIPSO_V4_CACHE_BUCKETS - 1);
spin_lock_bh(&cipso_v4_cache[bkt].lock);
if (cipso_v4_cache[bkt].size < cipso_v4_cache_bucketsize) {
list_add(&entry->list, &cipso_v4_cache[bkt].list);
cipso_v4_cache[bkt].size += 1;
} else {
old_entry = list_entry(cipso_v4_cache[bkt].list.prev,
struct cipso_v4_map_cache_entry, list);
list_del(&old_entry->list);
list_add(&entry->list, &cipso_v4_cache[bkt].list);
cipso_v4_cache_entry_free(old_entry);
}
spin_unlock_bh(&cipso_v4_cache[bkt].lock);
return 0;
cache_add_failure:
if (entry)
cipso_v4_cache_entry_free(entry);
return ret_val;
}
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Person | Tokens | Prop | Commits | CommitProp |
Paul Moore | 283 | 97.92% | 4 | 57.14% |
Arnaldo Carvalho de Melo | 3 | 1.04% | 1 | 14.29% |
Ian Morris | 2 | 0.69% | 1 | 14.29% |
Pavel Emelyanov | 1 | 0.35% | 1 | 14.29% |
Total | 289 | 100.00% | 7 | 100.00% |
/*
* DOI List Functions
*/
/**
* cipso_v4_doi_search - Searches for a DOI definition
* @doi: the DOI to search for
*
* Description:
* Search the DOI definition list for a DOI definition with a DOI value that
* matches @doi. The caller is responsible for calling rcu_read_[un]lock().
* Returns a pointer to the DOI definition on success and NULL on failure.
*/
static struct cipso_v4_doi *cipso_v4_doi_search(u32 doi)
{
struct cipso_v4_doi *iter;
list_for_each_entry_rcu(iter, &cipso_v4_doi_list, list)
if (iter->doi == doi && atomic_read(&iter->refcount))
return iter;
return NULL;
}
Contributors
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Paul Moore | 46 | 100.00% | 2 | 100.00% |
Total | 46 | 100.00% | 2 | 100.00% |
/**
* cipso_v4_doi_add - Add a new DOI to the CIPSO protocol engine
* @doi_def: the DOI structure
* @audit_info: NetLabel audit information
*
* Description:
* The caller defines a new DOI for use by the CIPSO engine and calls this
* function to add it to the list of acceptable domains. The caller must
* ensure that the mapping table specified in @doi_def->map meets all of the
* requirements of the mapping type (see cipso_ipv4.h for details). Returns
* zero on success and non-zero on failure.
*
*/
int cipso_v4_doi_add(struct cipso_v4_doi *doi_def,
struct netlbl_audit *audit_info)
{
int ret_val = -EINVAL;
u32 iter;
u32 doi;
u32 doi_type;
struct audit_buffer *audit_buf;
doi = doi_def->doi;
doi_type = doi_def->type;
if (doi_def->doi == CIPSO_V4_DOI_UNKNOWN)
goto doi_add_return;
for (iter = 0; iter < CIPSO_V4_TAG_MAXCNT; iter++) {
switch (doi_def->tags[iter]) {
case CIPSO_V4_TAG_RBITMAP:
break;
case CIPSO_V4_TAG_RANGE:
case CIPSO_V4_TAG_ENUM:
if (doi_def->type != CIPSO_V4_MAP_PASS)
goto doi_add_return;
break;
case CIPSO_V4_TAG_LOCAL:
if (doi_def->type != CIPSO_V4_MAP_LOCAL)
goto doi_add_return;
break;
case CIPSO_V4_TAG_INVALID:
if (iter == 0)
goto doi_add_return;
break;
default:
goto doi_add_return;
}
}
atomic_set(&doi_def->refcount, 1);
spin_lock(&cipso_v4_doi_list_lock);
if (cipso_v4_doi_search(doi_def->doi)) {
spin_unlock(&cipso_v4_doi_list_lock);
ret_val = -EEXIST;
goto doi_add_return;
}
list_add_tail_rcu(&doi_def->list, &cipso_v4_doi_list);
spin_unlock(&cipso_v4_doi_list_lock);
ret_val = 0;
doi_add_return:
audit_buf = netlbl_audit_start(AUDIT_MAC_CIPSOV4_ADD, audit_info);
if (audit_buf) {
const char *type_str;
switch (doi_type) {
case CIPSO_V4_MAP_TRANS:
type_str = "trans";
break;
case CIPSO_V4_MAP_PASS:
type_str = "pass";
break;
case CIPSO_V4_MAP_LOCAL:
type_str = "local";
break;
default:
type_str = "(unknown)";
}
audit_log_format(audit_buf,
" cipso_doi=%u cipso_type=%s res=%u",
doi, type_str, ret_val == 0 ? 1 : 0);
audit_log_end(audit_buf);
}
return ret_val;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Paul Moore | 284 | 100.00% | 7 | 100.00% |
Total | 284 | 100.00% | 7 | 100.00% |
/**
* cipso_v4_doi_free - Frees a DOI definition
* @doi_def: the DOI definition
*
* Description:
* This function frees all of the memory associated with a DOI definition.
*
*/
void cipso_v4_doi_free(struct cipso_v4_doi *doi_def)
{
if (!doi_def)
return;
switch (doi_def->type) {
case CIPSO_V4_MAP_TRANS:
kfree(doi_def->map.std->lvl.cipso);
kfree(doi_def->map.std->lvl.local);
kfree(doi_def->map.std->cat.cipso);
kfree(doi_def->map.std->cat.local);
break;
}
kfree(doi_def);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Paul Moore | 84 | 98.82% | 4 | 80.00% |
Ian Morris | 1 | 1.18% | 1 | 20.00% |
Total | 85 | 100.00% | 5 | 100.00% |
/**
* cipso_v4_doi_free_rcu - Frees a DOI definition via the RCU pointer
* @entry: the entry's RCU field
*
* Description:
* This function is designed to be used as a callback to the call_rcu()
* function so that the memory allocated to the DOI definition can be released
* safely.
*
*/
static void cipso_v4_doi_free_rcu(struct rcu_head *entry)
{
struct cipso_v4_doi *doi_def;
doi_def = container_of(entry, struct cipso_v4_doi, rcu);
cipso_v4_doi_free(doi_def);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Paul Moore | 33 | 100.00% | 2 | 100.00% |
Total | 33 | 100.00% | 2 | 100.00% |
/**
* cipso_v4_doi_remove - Remove an existing DOI from the CIPSO protocol engine
* @doi: the DOI value
* @audit_secid: the LSM secid to use in the audit message
*
* Description:
* Removes a DOI definition from the CIPSO engine. The NetLabel routines will
* be called to release their own LSM domain mappings as well as our own
* domain list. Returns zero on success and negative values on failure.
*
*/
int cipso_v4_doi_remove(u32 doi, struct netlbl_audit *audit_info)
{
int ret_val;
struct cipso_v4_doi *doi_def;
struct audit_buffer *audit_buf;
spin_lock(&cipso_v4_doi_list_lock);
doi_def = cipso_v4_doi_search(doi);
if (!doi_def) {
spin_unlock(&cipso_v4_doi_list_lock);
ret_val = -ENOENT;
goto doi_remove_return;
}
if (!atomic_dec_and_test(&doi_def->refcount)) {
spin_unlock(&cipso_v4_doi_list_lock);
ret_val = -EBUSY;
goto doi_remove_return;
}
list_del_rcu(&doi_def->list);
spin_unlock(&cipso_v4_doi_list_lock);
cipso_v4_cache_invalidate();
call_rcu(&doi_def->rcu, cipso_v4_doi_free_rcu);
ret_val = 0;
doi_remove_return:
audit_buf = netlbl_audit_start(AUDIT_MAC_CIPSOV4_DEL, audit_info);
if (audit_buf) {
audit_log_format(audit_buf,
" cipso_doi=%u res=%u",
doi, ret_val == 0 ? 1 : 0);
audit_log_end(audit_buf);
}
return ret_val;
}
Contributors
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Paul Moore | 159 | 99.38% | 4 | 80.00% |
Ian Morris | 1 | 0.62% | 1 | 20.00% |
Total | 160 | 100.00% | 5 | 100.00% |
/**
* cipso_v4_doi_getdef - Returns a reference to a valid DOI definition
* @doi: the DOI value
*
* Description:
* Searches for a valid DOI definition and if one is found it is returned to
* the caller. Otherwise NULL is returned. The caller must ensure that
* rcu_read_lock() is held while accessing the returned definition and the DOI
* definition reference count is decremented when the caller is done.
*
*/
struct cipso_v4_doi *cipso_v4_doi_getdef(u32 doi)
{
struct cipso_v4_doi *doi_def;
rcu_read_lock();
doi_def = cipso_v4_doi_search(doi);
if (!doi_def)
goto doi_getdef_return;
if (!atomic_inc_not_zero(&doi_def->refcount))
doi_def = NULL;
doi_getdef_return:
rcu_read_unlock();
return doi_def;
}
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Paul Moore | 55 | 98.21% | 2 | 66.67% |
Ian Morris | 1 | 1.79% | 1 | 33.33% |
Total | 56 | 100.00% | 3 | 100.00% |
/**
* cipso_v4_doi_putdef - Releases a reference for the given DOI definition
* @doi_def: the DOI definition
*
* Description:
* Releases a DOI definition reference obtained from cipso_v4_doi_getdef().
*
*/
void cipso_v4_doi_putdef(struct cipso_v4_doi *doi_def)
{
if (!doi_def)
return;
if (!atomic_dec_and_test(&doi_def->refcount))
return;
spin_lock(&cipso_v4_doi_list_lock);
list_del_rcu(&doi_def->list);
spin_unlock(&cipso_v4_doi_list_lock);
cipso_v4_cache_invalidate();
call_rcu(&doi_def->rcu, cipso_v4_doi_free_rcu);
}
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Paul Moore | 60 | 98.36% | 1 | 50.00% |
Ian Morris | 1 | 1.64% | 1 | 50.00% |
Total | 61 | 100.00% | 2 | 100.00% |
/**
* cipso_v4_doi_walk - Iterate through the DOI definitions
* @skip_cnt: skip past this number of DOI definitions, updated
* @callback: callback for each DOI definition
* @cb_arg: argument for the callback function
*
* Description:
* Iterate over the DOI definition list, skipping the first @skip_cnt entries.
* For each entry call @callback, if @callback returns a negative value stop
* 'walking' through the list and return. Updates the value in @skip_cnt upon
* return. Returns zero on success, negative values on failure.
*
*/
int cipso_v4_doi_walk(u32 *skip_cnt,
int (*callback) (struct cipso_v4_doi *doi_def, void *arg),
void *cb_arg)
{
int ret_val = -ENOENT;
u32 doi_cnt = 0;
struct cipso_v4_doi *iter_doi;
rcu_read_lock();
list_for_each_entry_rcu(iter_doi, &cipso_v4_doi_list, list)
if (atomic_read(&iter_doi->refcount) > 0) {
if (doi_cnt++ < *skip_cnt)
continue;
ret_val = callback(iter_doi, cb_arg);
if (ret_val < 0) {
doi_cnt--;
goto doi_walk_return;
}
}
doi_walk_return:
rcu_read_unlock();
*skip_cnt = doi_cnt;
return ret_val;
}
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Paul Moore | 115 | 100.00% | 3 | 100.00% |
Total | 115 | 100.00% | 3 | 100.00% |
/*
* Label Mapping Functions
*/
/**
* cipso_v4_map_lvl_valid - Checks to see if the given level is understood
* @doi_def: the DOI definition
* @level: the level to check
*
* Description:
* Checks the given level against the given DOI definition and returns a
* negative value if the level does not have a valid mapping and a zero value
* if the level is defined by the DOI.
*
*/
static int cipso_v4_map_lvl_valid(const struct cipso_v4_doi *doi_def, u8 level)
{
switch (doi_def->type) {
case CIPSO_V4_MAP_PASS:
return 0;
case CIPSO_V4_MAP_TRANS:
if (doi_def->map.std->lvl.cipso[level] < CIPSO_V4_INV_LVL)
return 0;
break;
}
return -EFAULT;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Paul Moore | 57 | 100.00% | 2 | 100.00% |
Total | 57 | 100.00% | 2 | 100.00% |
/**
* cipso_v4_map_lvl_hton - Perform a level mapping from the host to the network
* @doi_def: the DOI definition
* @host_lvl: the host MLS level
* @net_lvl: the network/CIPSO MLS level
*
* Description:
* Perform a label mapping to translate a local MLS level to the correct
* CIPSO level using the given DOI definition. Returns zero on success,
* negative values otherwise.
*
*/
static int cipso_v4_map_lvl_hton(const struct cipso_v4_doi *doi_def,
u32 host_lvl,
u32 *net_lvl)
{
switch (doi_def->type) {
case CIPSO_V4_MAP_PASS:
*net_lvl = host_lvl;
return 0;
case CIPSO_V4_MAP_TRANS:
if (host_lvl < doi_def->map.std->lvl.local_size &&
doi_def->map.std->lvl.local[host_lvl] < CIPSO_V4_INV_LVL) {
*net_lvl = doi_def->map.std->lvl.local[host_lvl];
return 0;
}
return -EPERM;
}
return -EINVAL;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Paul Moore | 99 | 100.00% | 3 | 100.00% |
Total | 99 | 100.00% | 3 | 100.00% |
/**
* cipso_v4_map_lvl_ntoh - Perform a level mapping from the network to the host
* @doi_def: the DOI definition
* @net_lvl: the network/CIPSO MLS level
* @host_lvl: the host MLS level
*
* Description:
* Perform a label mapping to translate a CIPSO level to the correct local MLS
* level using the given DOI definition. Returns zero on success, negative
* values otherwise.
*
*/
static int cipso_v4_map_lvl_ntoh(const struct cipso_v4_doi *doi_def,
u32 net_lvl,
u32 *host_lvl)
{
struct cipso_v4_std_map_tbl *map_tbl;
switch (doi_def->type) {
case CIPSO_V4_MAP_PASS:
*host_lvl = net_lvl;
return 0;
case CIPSO_V4_MAP_TRANS:
map_tbl = doi_def->map.std;
if (net_lvl < map_tbl->lvl.cipso_size &&
map_tbl->lvl.cipso[net_lvl] < CIPSO_V4_INV_LVL) {
*host_lvl = doi_def->map.std->lvl.cipso[net_lvl];
return 0;
}
return -EPERM;
}
return -EINVAL;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Paul Moore | 104 | 100.00% | 3 | 100.00% |
Total | 104 | 100.00% | 3 | 100.00% |
/**
* cipso_v4_map_cat_rbm_valid - Checks to see if the category bitmap is valid
* @doi_def: the DOI definition
* @bitmap: category bitmap
* @bitmap_len: bitmap length in bytes
*
* Description:
* Checks the given category bitmap against the given DOI definition and
* returns a negative value if any of the categories in the bitmap do not have
* a valid mapping and a zero value if all of the categories are valid.
*
*/
static int cipso_v4_map_cat_rbm_valid(const struct cipso_v4_doi *doi_def,
const unsigned char *bitmap,
u32 bitmap_len)
{
int cat = -1;
u32 bitmap_len_bits = bitmap_len * 8;
u32 cipso_cat_size;
u32 *cipso_array;
switch (doi_def->type) {
case CIPSO_V4_MAP_PASS:
return 0;
case CIPSO_V4_MAP_TRANS:
cipso_cat_size = doi_def->map.std->cat.cipso_size;
cipso_array = doi_def->map.std->cat.cipso;
for (;;) {
cat = netlbl_bitmap_walk(bitmap,
bitmap_len_bits,
cat + 1,
1);
if (cat < 0)
break;
if (cat >= cipso_cat_size ||
cipso_array[cat] >= CIPSO_V4_INV_CAT)
return -EFAULT;
}
if (cat == -1)
return 0;
break;
}
return -EFAULT;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Paul Moore | 142 | 99.30% | 3 | 75.00% |
Huw Davies | 1 | 0.70% | 1 | 25.00% |
Total | 143 | 100.00% | 4 | 100.00% |
/**
* cipso_v4_map_cat_rbm_hton - Perform a category mapping from host to network
* @doi_def: the DOI definition
* @secattr: the security attributes
* @net_cat: the zero'd out category bitmap in network/CIPSO format
* @net_cat_len: the length of the CIPSO bitmap in bytes
*
* Description:
* Perform a label mapping to translate a local MLS category bitmap to the
* correct CIPSO bitmap using the given DOI definition. Returns the minimum
* size in bytes of the network bitmap on success, negative values otherwise.
*
*/
static int cipso_v4_map_cat_rbm_hton(const struct cipso_v4_doi *doi_def,
const struct netlbl_lsm_secattr *secattr,
unsigned char *net_cat,
u32 net_cat_len)
{
int host_spot = -1;
u32 net_spot = CIPSO_V4_INV_CAT;
u32 net_spot_max = 0;
u32 net_clen_bits = net_cat_len * 8;
u32 host_cat_size = 0;
u32 *host_cat_array = NULL;
if (doi_def->type == CIPSO_V4_MAP_TRANS) {
host_cat_size = doi_def->map.std->cat.local_size;
host_cat_array = doi_def->map.std->cat.local;
}
for (;;) {
host_spot = netlbl_catmap_walk(secattr->attr.mls.cat,
host_spot + 1);
if (host_spot < 0)
break;
switch (doi_def->type) {
case CIPSO_V4_MAP_PASS:
net_spot = host_spot;
break;
case CIPSO_V4_MAP_TRANS:
if (host_spot >= host_cat_size)
return -EPERM;
net_spot = host_cat_array[host_spot];
if (net_spot >= CIPSO_V4_INV_CAT)
return -EPERM;
break;
}
if (net_spot >= net_clen_bits)
return -ENOSPC;
netlbl_bitmap_setbit(net_cat, net_spot, 1);
if (net_spot > net_spot_max)
net_spot_max = net_spot;
}
if (++net_spot_max % 8)
return net_spot_max / 8 + 1;
return net_spot_max / 8;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Paul Moore | 219 | 99.55% | 7 | 87.50% |
Huw Davies | 1 | 0.45% | 1 | 12.50% |
Total | 220 | 100.00% | 8 | 100.00% |
/**
* cipso_v4_map_cat_rbm_ntoh - Perform a category mapping from network to host
* @doi_def: the DOI definition
* @net_cat: the category bitmap in network/CIPSO format
* @net_cat_len: the length of the CIPSO bitmap in bytes
* @secattr: the security attributes
*
* Description:
* Perform a label mapping to translate a CIPSO bitmap to the correct local
* MLS category bitmap using the given DOI definition. Returns zero on
* success, negative values on failure.
*
*/
static int cipso_v4_map_cat_rbm_ntoh(const struct cipso_v4_doi *doi_def,
const unsigned char *net_cat,
u32 net_cat_len,
struct netlbl_lsm_secattr *secattr)
{
int ret_val;
int net_spot = -1;
u32 host_spot = CIPSO_V4_INV_CAT;
u32 net_clen_bits = net_cat_len * 8;
u32 net_cat_size = 0;
u32 *net_cat_array = NULL;
if (doi_def->type == CIPSO_V4_MAP_TRANS) {
net_cat_size = doi_def->map.std->cat.cipso_size;
net_cat_array = doi_def->map.std->cat.cipso;
}
for (;;) {
net_spot = netlbl_bitmap_walk(net_cat,
net_clen_bits,
net_spot + 1,
1);
if (net_spot < 0) {
if (net_spot == -2)
return -EFAULT;
return 0;
}
switch (doi_def->type) {
case CIPSO_V4_MAP_PASS:
host_spot = net_spot;
break;
case CIPSO_V4_MAP_TRANS:
if (net_spot >= net_cat_size)
return -EPERM;
host_spot = net_cat_array[net_spot];
if (host_spot >= CIPSO_V4_INV_CAT)
return -EPERM;
break;
}
ret_val = netlbl_catmap_setbit(&secattr->attr.mls.cat,
host_spot,
GFP_ATOMIC);
if (ret_val != 0)
return ret_val;
}
return -EINVAL;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Paul Moore | 213 | 99.53% | 8 | 88.89% |
Huw Davies | 1 | 0.47% | 1 | 11.11% |
Total | 214 | 100.00% | 9 | 100.00% |
/**
* cipso_v4_map_cat_enum_valid - Checks to see if the categories are valid
* @doi_def: the DOI definition
* @enumcat: category list
* @enumcat_len: length of the category list in bytes
*
* Description:
* Checks the given categories against the given DOI definition and returns a
* negative value if any of the categories do not have a valid mapping and a
* zero value if all of the categories are valid.
*
*/
static int cipso_v4_map_cat_enum_valid(const struct cipso_v4_doi *doi_def,
const unsigned char *enumcat,
u32 enumcat_len)
{
u16 cat;
int cat_prev = -1;
u32 iter;
if (doi_def->type != CIPSO_V4_MAP_PASS || enumcat_len & 0x01)
return -EFAULT;
for (iter = 0; iter < enumcat_len; iter += 2) {
cat = get_unaligned_be16(&enumcat[iter]);
if (cat <= cat_prev)
return -EFAULT;
cat_prev = cat;
}
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Paul Moore | 92 | 98.92% | 4 | 80.00% |
Harvey Harrison | 1 | 1.08% | 1 | 20.00% |
Total | 93 | 100.00% | 5 | 100.00% |
/**
* cipso_v4_map_cat_enum_hton - Perform a category mapping from host to network
* @doi_def: the DOI definition
* @secattr: the security attributes
* @net_cat: the zero'd out category list in network/CIPSO format
* @net_cat_len: the length of the CIPSO category list in bytes
*
* Description:
* Perform a label mapping to translate a local MLS category bitmap to the
* correct CIPSO category list using the given DOI definition. Returns the
* size in bytes of the network category bitmap on success, negative values
* otherwise.
*
*/
static int cipso_v4_map_cat_enum_hton(const struct cipso_v4_doi *doi_def,
const struct netlbl_lsm_secattr *secattr,
unsigned char *net_cat,
u32 net_cat_len)
{
int cat = -1;
u32 cat_iter = 0;
for (;;) {
cat = netlbl_catmap_walk(secattr->attr.mls.cat, cat + 1);
if (cat < 0)
break;
if ((cat_iter + 2) > net_cat_len)
return -ENOSPC;
*((__be16 *)&net_cat[cat_iter]) = htons(cat);
cat_iter += 2;
}
return cat_iter;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Paul Moore | 107 | 100.00% | 6 | 100.00% |
Total | 107 | 100.00% | 6 | 100.00% |
/**
* cipso_v4_map_cat_enum_ntoh - Perform a category mapping from network to host
* @doi_def: the DOI definition
* @net_cat: the category list in network/CIPSO format
* @net_cat_len: the length of the CIPSO bitmap in bytes
* @secattr: the security attributes
*
* Description:
* Perform a label mapping to translate a CIPSO category list to the correct
* local MLS category bitmap using the given DOI definition. Returns zero on
* success, negative values on failure.
*
*/
static int cipso_v4_map_cat_enum_ntoh(const struct cipso_v4_doi *doi_def,
const unsigned char *net_cat,
u32 net_cat_len,
struct netlbl_lsm_secattr *secattr)
{
int ret_val;
u32 iter;
for (iter = 0; iter < net_cat_len; iter += 2) {
ret_val = netlbl_catmap_setbit(&secattr->attr.mls.cat,
get_unaligned_be16(&net_cat[iter]),
GFP_ATOMIC);
if (ret_val != 0)
return ret_val;
}
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Paul Moore | 84 | 98.82% | 5 | 83.33% |
Harvey Harrison | 1 | 1.18% | 1 | 16.67% |
Total | 85 | 100.00% | 6 | 100.00% |
/**
* cipso_v4_map_cat_rng_valid - Checks to see if the categories are valid
* @doi_def: the DOI definition
* @rngcat: category list
* @rngcat_len: length of the category list in bytes
*
* Description:
* Checks the given categories against the given DOI definition and returns a
* negative value if any of the categories do not have a valid mapping and a
* zero value if all of the categories are valid.
*
*/
static int cipso_v4_map_cat_rng_valid(const struct cipso_v4_doi *doi_def,
const unsigned char *rngcat,
u32 rngcat_len)
{
u16 cat_high;
u16 cat_low;
u32 cat_prev = CIPSO_V4_MAX_REM_CATS + 1;
u32 iter;
if (doi_def->type != CIPSO_V4_MAP_PASS || rngcat_len & 0x01)
return -EFAULT;
for (iter = 0; iter < rngcat_len; iter += 4) {
cat_high = get_unaligned_be16(&rngcat[iter]);
if ((iter + 4) <= rngcat_len)
cat_low = get_unaligned_be16