#include "include/policy.h"
#include "include/policy_ns.h"
#include "include/resource.h"
+#include "include/policy_unpack.h"
/**
* aa_mangle_name - mangle a profile name to std profile layout form
* Returns: kernel buffer containing copy of user buffer data or an
* ERR_PTR on failure.
*/
-static char *aa_simple_write_to_buffer(int op, const char __user *userbuf,
- size_t alloc_size, size_t copy_size,
- loff_t *pos)
+static struct aa_loaddata *aa_simple_write_to_buffer(int op,
+ const char __user *userbuf,
+ size_t alloc_size,
+ size_t copy_size,
+ loff_t *pos)
{
- char *data;
+ struct aa_loaddata *data;
BUG_ON(copy_size > alloc_size);
/* only writes from pos 0, that is complete writes */
return ERR_PTR(-ESPIPE);
- /*
- * Don't allow profile load/replace/remove from profiles that don't
- * have CAP_MAC_ADMIN
- */
- if (!aa_may_manage_policy(__aa_current_profile(), NULL, op))
- return ERR_PTR(-EACCES);
-
/* freed by caller to simple_write_to_buffer */
- data = kvmalloc(alloc_size);
+ data = kvmalloc(sizeof(*data) + alloc_size);
if (data == NULL)
return ERR_PTR(-ENOMEM);
+ kref_init(&data->count);
+ data->size = copy_size;
+ data->hash = NULL;
+ data->abi = 0;
- if (copy_from_user(data, userbuf, copy_size)) {
+ if (copy_from_user(data->data, userbuf, copy_size)) {
kvfree(data);
return ERR_PTR(-EFAULT);
}
return data;
}
-
-/* .load file hook fn to load policy */
-static ssize_t profile_load(struct file *f, const char __user *buf, size_t size,
- loff_t *pos)
+static ssize_t policy_update(int binop, const char __user *buf, size_t size,
+ loff_t *pos)
{
- char *data;
ssize_t error;
+ struct aa_loaddata *data;
+ struct aa_profile *profile = aa_current_profile();
+ int op = binop == PROF_ADD ? OP_PROF_LOAD : OP_PROF_REPL;
+ /* high level check about policy management - fine grained in
+ * below after unpack
+ */
+ error = aa_may_manage_policy(profile, profile->ns, op);
+ if (error)
+ return error;
- data = aa_simple_write_to_buffer(OP_PROF_LOAD, buf, size, size, pos);
-
+ data = aa_simple_write_to_buffer(op, buf, size, size, pos);
error = PTR_ERR(data);
if (!IS_ERR(data)) {
- error = aa_replace_profiles(__aa_current_profile()->ns, data,
- size, PROF_ADD);
- kvfree(data);
+ error = aa_replace_profiles(profile->ns, binop, data);
+ aa_put_loaddata(data);
}
return error;
}
+static ssize_t profile_load(struct file *f, const char __user *buf, size_t size,
+ loff_t *pos)
+{
+ int error = policy_update(PROF_ADD, buf, size, pos);
+
+ return error;
+}
+
static const struct file_operations aa_fs_profile_load = {
.write = profile_load,
.llseek = default_llseek,
static ssize_t profile_replace(struct file *f, const char __user *buf,
size_t size, loff_t *pos)
{
- char *data;
- ssize_t error;
-
- data = aa_simple_write_to_buffer(OP_PROF_REPL, buf, size, size, pos);
- error = PTR_ERR(data);
- if (!IS_ERR(data)) {
- error = aa_replace_profiles(__aa_current_profile()->ns, data,
- size, PROF_REPLACE);
- kvfree(data);
- }
+ int error = policy_update(PROF_REPLACE, buf, size, pos);
return error;
}
.llseek = default_llseek,
};
-/* .remove file hook fn to remove loaded policy */
static ssize_t profile_remove(struct file *f, const char __user *buf,
size_t size, loff_t *pos)
{
- char *data;
+ struct aa_loaddata *data;
+ struct aa_profile *profile;
ssize_t error;
+ profile = aa_current_profile();
+ /* high level check about policy management - fine grained in
+ * below after unpack
+ */
+ error = aa_may_manage_policy(profile, profile->ns, OP_PROF_RM);
+ if (error)
+ goto out;
+
/*
* aa_remove_profile needs a null terminated string so 1 extra
* byte is allocated and the copied data is null terminated.
*/
- data = aa_simple_write_to_buffer(OP_PROF_RM, buf, size + 1, size, pos);
+ data = aa_simple_write_to_buffer(OP_PROF_RM, buf, size + 1, size,
+ pos);
error = PTR_ERR(data);
if (!IS_ERR(data)) {
- data[size] = 0;
- error = aa_remove_profiles(__aa_current_profile()->ns, data,
- size);
- kvfree(data);
+ data->data[size] = 0;
+ error = aa_remove_profiles(profile->ns, data->data, size);
+ aa_put_loaddata(data);
}
-
+ out:
return error;
}
.release = single_release,
};
+static int rawdata_release(struct inode *inode, struct file *file)
+{
+ /* TODO: switch to loaddata when profile switched to symlink */
+ aa_put_loaddata(file->private_data);
+
+ return 0;
+}
+
+static int aa_fs_seq_raw_abi_show(struct seq_file *seq, void *v)
+{
+ struct aa_proxy *proxy = seq->private;
+ struct aa_profile *profile = aa_get_profile_rcu(&proxy->profile);
+
+ if (profile->rawdata->abi) {
+ seq_printf(seq, "v%d", profile->rawdata->abi);
+ seq_puts(seq, "\n");
+ }
+ aa_put_profile(profile);
+
+ return 0;
+}
+
+static int aa_fs_seq_raw_abi_open(struct inode *inode, struct file *file)
+{
+ return aa_fs_seq_profile_open(inode, file, aa_fs_seq_raw_abi_show);
+}
+
+static const struct file_operations aa_fs_seq_raw_abi_fops = {
+ .owner = THIS_MODULE,
+ .open = aa_fs_seq_raw_abi_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = aa_fs_seq_profile_release,
+};
+
+static int aa_fs_seq_raw_hash_show(struct seq_file *seq, void *v)
+{
+ struct aa_proxy *proxy = seq->private;
+ struct aa_profile *profile = aa_get_profile_rcu(&proxy->profile);
+ unsigned int i, size = aa_hash_size();
+
+ if (profile->rawdata->hash) {
+ for (i = 0; i < size; i++)
+ seq_printf(seq, "%.2x", profile->rawdata->hash[i]);
+ seq_puts(seq, "\n");
+ }
+ aa_put_profile(profile);
+
+ return 0;
+}
+
+static int aa_fs_seq_raw_hash_open(struct inode *inode, struct file *file)
+{
+ return aa_fs_seq_profile_open(inode, file, aa_fs_seq_raw_hash_show);
+}
+
+static const struct file_operations aa_fs_seq_raw_hash_fops = {
+ .owner = THIS_MODULE,
+ .open = aa_fs_seq_raw_hash_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = aa_fs_seq_profile_release,
+};
+
+static ssize_t rawdata_read(struct file *file, char __user *buf, size_t size,
+ loff_t *ppos)
+{
+ struct aa_loaddata *rawdata = file->private_data;
+
+ return simple_read_from_buffer(buf, size, ppos, rawdata->data,
+ rawdata->size);
+}
+
+static int rawdata_open(struct inode *inode, struct file *file)
+{
+ struct aa_proxy *proxy = inode->i_private;
+ struct aa_profile *profile;
+
+ if (!policy_view_capable(NULL))
+ return -EACCES;
+ profile = aa_get_profile_rcu(&proxy->profile);
+ file->private_data = aa_get_loaddata(profile->rawdata);
+ aa_put_profile(profile);
+
+ return 0;
+}
+
+static const struct file_operations aa_fs_rawdata_fops = {
+ .open = rawdata_open,
+ .read = rawdata_read,
+ .llseek = generic_file_llseek,
+ .release = rawdata_release,
+};
+
/** fns to setup dynamic per profile/namespace files **/
void __aa_fs_profile_rmdir(struct aa_profile *profile)
{
profile->dents[AAFS_PROF_HASH] = dent;
}
+ if (profile->rawdata) {
+ dent = create_profile_file(dir, "raw_sha1", profile,
+ &aa_fs_seq_raw_hash_fops);
+ if (IS_ERR(dent))
+ goto fail;
+ profile->dents[AAFS_PROF_RAW_HASH] = dent;
+
+ dent = create_profile_file(dir, "raw_abi", profile,
+ &aa_fs_seq_raw_abi_fops);
+ if (IS_ERR(dent))
+ goto fail;
+ profile->dents[AAFS_PROF_RAW_ABI] = dent;
+
+ dent = securityfs_create_file("raw_data", S_IFREG | 0444, dir,
+ profile->proxy,
+ &aa_fs_rawdata_fops);
+ if (IS_ERR(dent))
+ goto fail;
+ profile->dents[AAFS_PROF_RAW_DATA] = dent;
+ d_inode(dent)->i_size = profile->rawdata->size;
+ aa_get_proxy(profile->proxy);
+ }
+
list_for_each_entry(child, &profile->base.profiles, base.list) {
error = __aa_fs_profile_mkdir(child, prof_child_dir(profile));
if (error)
static int profiles_open(struct inode *inode, struct file *file)
{
+ if (!policy_view_capable(NULL))
+ return -EACCES;
+
return seq_open(file, &aa_fs_profiles_op);
}
projects / linux.git / commitdiff