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-rw-r--r--fs/ecryptfs/crypto.c51
-rw-r--r--fs/ecryptfs/ecryptfs_kernel.h4
-rw-r--r--fs/ecryptfs/inode.c32
-rw-r--r--fs/ecryptfs/keystore.c3
-rw-r--r--fs/ecryptfs/main.c5
5 files changed, 53 insertions, 42 deletions
diff --git a/fs/ecryptfs/crypto.c b/fs/ecryptfs/crypto.c
index f6caeb1d1106..8b65f289ee00 100644
--- a/fs/ecryptfs/crypto.c
+++ b/fs/ecryptfs/crypto.c
@@ -946,6 +946,8 @@ static int ecryptfs_copy_mount_wide_sigs_to_inode_sigs(
list_for_each_entry(global_auth_tok,
&mount_crypt_stat->global_auth_tok_list,
mount_crypt_stat_list) {
+ if (global_auth_tok->flags & ECRYPTFS_AUTH_TOK_FNEK)
+ continue;
rc = ecryptfs_add_keysig(crypt_stat, global_auth_tok->sig);
if (rc) {
printk(KERN_ERR "Error adding keysig; rc = [%d]\n", rc);
@@ -1322,14 +1324,13 @@ static int ecryptfs_write_headers_virt(char *page_virt, size_t max,
}
static int
-ecryptfs_write_metadata_to_contents(struct ecryptfs_crypt_stat *crypt_stat,
- struct dentry *ecryptfs_dentry,
- char *virt)
+ecryptfs_write_metadata_to_contents(struct dentry *ecryptfs_dentry,
+ char *virt, size_t virt_len)
{
int rc;
rc = ecryptfs_write_lower(ecryptfs_dentry->d_inode, virt,
- 0, crypt_stat->num_header_bytes_at_front);
+ 0, virt_len);
if (rc)
printk(KERN_ERR "%s: Error attempting to write header "
"information to lower file; rc = [%d]\n", __func__,
@@ -1339,7 +1340,6 @@ ecryptfs_write_metadata_to_contents(struct ecryptfs_crypt_stat *crypt_stat,
static int
ecryptfs_write_metadata_to_xattr(struct dentry *ecryptfs_dentry,
- struct ecryptfs_crypt_stat *crypt_stat,
char *page_virt, size_t size)
{
int rc;
@@ -1349,6 +1349,17 @@ ecryptfs_write_metadata_to_xattr(struct dentry *ecryptfs_dentry,
return rc;
}
+static unsigned long ecryptfs_get_zeroed_pages(gfp_t gfp_mask,
+ unsigned int order)
+{
+ struct page *page;
+
+ page = alloc_pages(gfp_mask | __GFP_ZERO, order);
+ if (page)
+ return (unsigned long) page_address(page);
+ return 0;
+}
+
/**
* ecryptfs_write_metadata
* @ecryptfs_dentry: The eCryptfs dentry
@@ -1365,7 +1376,9 @@ int ecryptfs_write_metadata(struct dentry *ecryptfs_dentry)
{
struct ecryptfs_crypt_stat *crypt_stat =
&ecryptfs_inode_to_private(ecryptfs_dentry->d_inode)->crypt_stat;
+ unsigned int order;
char *virt;
+ size_t virt_len;
size_t size = 0;
int rc = 0;
@@ -1381,33 +1394,35 @@ int ecryptfs_write_metadata(struct dentry *ecryptfs_dentry)
rc = -EINVAL;
goto out;
}
+ virt_len = crypt_stat->num_header_bytes_at_front;
+ order = get_order(virt_len);
/* Released in this function */
- virt = (char *)get_zeroed_page(GFP_KERNEL);
+ virt = (char *)ecryptfs_get_zeroed_pages(GFP_KERNEL, order);
if (!virt) {
printk(KERN_ERR "%s: Out of memory\n", __func__);
rc = -ENOMEM;
goto out;
}
- rc = ecryptfs_write_headers_virt(virt, PAGE_CACHE_SIZE, &size,
- crypt_stat, ecryptfs_dentry);
+ rc = ecryptfs_write_headers_virt(virt, virt_len, &size, crypt_stat,
+ ecryptfs_dentry);
if (unlikely(rc)) {
printk(KERN_ERR "%s: Error whilst writing headers; rc = [%d]\n",
__func__, rc);
goto out_free;
}
if (crypt_stat->flags & ECRYPTFS_METADATA_IN_XATTR)
- rc = ecryptfs_write_metadata_to_xattr(ecryptfs_dentry,
- crypt_stat, virt, size);
+ rc = ecryptfs_write_metadata_to_xattr(ecryptfs_dentry, virt,
+ size);
else
- rc = ecryptfs_write_metadata_to_contents(crypt_stat,
- ecryptfs_dentry, virt);
+ rc = ecryptfs_write_metadata_to_contents(ecryptfs_dentry, virt,
+ virt_len);
if (rc) {
printk(KERN_ERR "%s: Error writing metadata out to lower file; "
"rc = [%d]\n", __func__, rc);
goto out_free;
}
out_free:
- free_page((unsigned long)virt);
+ free_pages((unsigned long)virt, order);
out:
return rc;
}
@@ -2206,17 +2221,19 @@ int ecryptfs_decode_and_decrypt_filename(char **plaintext_name,
struct dentry *ecryptfs_dir_dentry,
const char *name, size_t name_size)
{
+ struct ecryptfs_mount_crypt_stat *mount_crypt_stat =
+ &ecryptfs_superblock_to_private(
+ ecryptfs_dir_dentry->d_sb)->mount_crypt_stat;
char *decoded_name;
size_t decoded_name_size;
size_t packet_size;
int rc = 0;
- if ((name_size > ECRYPTFS_FNEK_ENCRYPTED_FILENAME_PREFIX_SIZE)
+ if ((mount_crypt_stat->flags & ECRYPTFS_GLOBAL_ENCRYPT_FILENAMES)
+ && !(mount_crypt_stat->flags & ECRYPTFS_ENCRYPTED_VIEW_ENABLED)
+ && (name_size > ECRYPTFS_FNEK_ENCRYPTED_FILENAME_PREFIX_SIZE)
&& (strncmp(name, ECRYPTFS_FNEK_ENCRYPTED_FILENAME_PREFIX,
ECRYPTFS_FNEK_ENCRYPTED_FILENAME_PREFIX_SIZE) == 0)) {
- struct ecryptfs_mount_crypt_stat *mount_crypt_stat =
- &ecryptfs_superblock_to_private(
- ecryptfs_dir_dentry->d_sb)->mount_crypt_stat;
const char *orig_name = name;
size_t orig_name_size = name_size;
diff --git a/fs/ecryptfs/ecryptfs_kernel.h b/fs/ecryptfs/ecryptfs_kernel.h
index c11fc95714ab..ac749d4d644f 100644
--- a/fs/ecryptfs/ecryptfs_kernel.h
+++ b/fs/ecryptfs/ecryptfs_kernel.h
@@ -328,6 +328,7 @@ struct ecryptfs_dentry_info {
*/
struct ecryptfs_global_auth_tok {
#define ECRYPTFS_AUTH_TOK_INVALID 0x00000001
+#define ECRYPTFS_AUTH_TOK_FNEK 0x00000002
u32 flags;
struct list_head mount_crypt_stat_list;
struct key *global_auth_tok_key;
@@ -619,7 +620,6 @@ int ecryptfs_interpose(struct dentry *hidden_dentry,
u32 flags);
int ecryptfs_lookup_and_interpose_lower(struct dentry *ecryptfs_dentry,
struct dentry *lower_dentry,
- struct ecryptfs_crypt_stat *crypt_stat,
struct inode *ecryptfs_dir_inode,
struct nameidata *ecryptfs_nd);
int ecryptfs_decode_and_decrypt_filename(char **decrypted_name,
@@ -696,7 +696,7 @@ ecryptfs_write_header_metadata(char *virt,
int ecryptfs_add_keysig(struct ecryptfs_crypt_stat *crypt_stat, char *sig);
int
ecryptfs_add_global_auth_tok(struct ecryptfs_mount_crypt_stat *mount_crypt_stat,
- char *sig);
+ char *sig, u32 global_auth_tok_flags);
int ecryptfs_get_global_auth_tok_for_sig(
struct ecryptfs_global_auth_tok **global_auth_tok,
struct ecryptfs_mount_crypt_stat *mount_crypt_stat, char *sig);
diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index 5697899a168d..55b3145b8072 100644
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -246,7 +246,6 @@ out:
*/
int ecryptfs_lookup_and_interpose_lower(struct dentry *ecryptfs_dentry,
struct dentry *lower_dentry,
- struct ecryptfs_crypt_stat *crypt_stat,
struct inode *ecryptfs_dir_inode,
struct nameidata *ecryptfs_nd)
{
@@ -254,6 +253,7 @@ int ecryptfs_lookup_and_interpose_lower(struct dentry *ecryptfs_dentry,
struct vfsmount *lower_mnt;
struct inode *lower_inode;
struct ecryptfs_mount_crypt_stat *mount_crypt_stat;
+ struct ecryptfs_crypt_stat *crypt_stat;
char *page_virt = NULL;
u64 file_size;
int rc = 0;
@@ -314,6 +314,11 @@ int ecryptfs_lookup_and_interpose_lower(struct dentry *ecryptfs_dentry,
goto out_free_kmem;
}
}
+ crypt_stat = &ecryptfs_inode_to_private(
+ ecryptfs_dentry->d_inode)->crypt_stat;
+ /* TODO: lock for crypt_stat comparison */
+ if (!(crypt_stat->flags & ECRYPTFS_POLICY_APPLIED))
+ ecryptfs_set_default_sizes(crypt_stat);
rc = ecryptfs_read_and_validate_header_region(page_virt,
ecryptfs_dentry->d_inode);
if (rc) {
@@ -362,9 +367,7 @@ static struct dentry *ecryptfs_lookup(struct inode *ecryptfs_dir_inode,
{
char *encrypted_and_encoded_name = NULL;
size_t encrypted_and_encoded_name_size;
- struct ecryptfs_crypt_stat *crypt_stat = NULL;
struct ecryptfs_mount_crypt_stat *mount_crypt_stat = NULL;
- struct ecryptfs_inode_info *inode_info;
struct dentry *lower_dir_dentry, *lower_dentry;
int rc = 0;
@@ -388,26 +391,15 @@ static struct dentry *ecryptfs_lookup(struct inode *ecryptfs_dir_inode,
}
if (lower_dentry->d_inode)
goto lookup_and_interpose;
- inode_info = ecryptfs_inode_to_private(ecryptfs_dentry->d_inode);
- if (inode_info) {
- crypt_stat = &inode_info->crypt_stat;
- /* TODO: lock for crypt_stat comparison */
- if (!(crypt_stat->flags & ECRYPTFS_POLICY_APPLIED))
- ecryptfs_set_default_sizes(crypt_stat);
- }
- if (crypt_stat)
- mount_crypt_stat = crypt_stat->mount_crypt_stat;
- else
- mount_crypt_stat = &ecryptfs_superblock_to_private(
- ecryptfs_dentry->d_sb)->mount_crypt_stat;
- if (!(crypt_stat && (crypt_stat->flags & ECRYPTFS_ENCRYPT_FILENAMES))
- && !(mount_crypt_stat && (mount_crypt_stat->flags
- & ECRYPTFS_GLOBAL_ENCRYPT_FILENAMES)))
+ mount_crypt_stat = &ecryptfs_superblock_to_private(
+ ecryptfs_dentry->d_sb)->mount_crypt_stat;
+ if (!(mount_crypt_stat
+ && (mount_crypt_stat->flags & ECRYPTFS_GLOBAL_ENCRYPT_FILENAMES)))
goto lookup_and_interpose;
dput(lower_dentry);
rc = ecryptfs_encrypt_and_encode_filename(
&encrypted_and_encoded_name, &encrypted_and_encoded_name_size,
- crypt_stat, mount_crypt_stat, ecryptfs_dentry->d_name.name,
+ NULL, mount_crypt_stat, ecryptfs_dentry->d_name.name,
ecryptfs_dentry->d_name.len);
if (rc) {
printk(KERN_ERR "%s: Error attempting to encrypt and encode "
@@ -426,7 +418,7 @@ static struct dentry *ecryptfs_lookup(struct inode *ecryptfs_dir_inode,
}
lookup_and_interpose:
rc = ecryptfs_lookup_and_interpose_lower(ecryptfs_dentry, lower_dentry,
- crypt_stat, ecryptfs_dir_inode,
+ ecryptfs_dir_inode,
ecryptfs_nd);
goto out;
out_d_drop:
diff --git a/fs/ecryptfs/keystore.c b/fs/ecryptfs/keystore.c
index ff539420cc6f..e4a6223c3145 100644
--- a/fs/ecryptfs/keystore.c
+++ b/fs/ecryptfs/keystore.c
@@ -2375,7 +2375,7 @@ struct kmem_cache *ecryptfs_global_auth_tok_cache;
int
ecryptfs_add_global_auth_tok(struct ecryptfs_mount_crypt_stat *mount_crypt_stat,
- char *sig)
+ char *sig, u32 global_auth_tok_flags)
{
struct ecryptfs_global_auth_tok *new_auth_tok;
int rc = 0;
@@ -2389,6 +2389,7 @@ ecryptfs_add_global_auth_tok(struct ecryptfs_mount_crypt_stat *mount_crypt_stat,
goto out;
}
memcpy(new_auth_tok->sig, sig, ECRYPTFS_SIG_SIZE_HEX);
+ new_auth_tok->flags = global_auth_tok_flags;
new_auth_tok->sig[ECRYPTFS_SIG_SIZE_HEX] = '\0';
mutex_lock(&mount_crypt_stat->global_auth_tok_list_mutex);
list_add(&new_auth_tok->mount_crypt_stat_list,
diff --git a/fs/ecryptfs/main.c b/fs/ecryptfs/main.c
index 789cf2e1be1e..aed56c25539b 100644
--- a/fs/ecryptfs/main.c
+++ b/fs/ecryptfs/main.c
@@ -319,7 +319,7 @@ static int ecryptfs_parse_options(struct super_block *sb, char *options)
case ecryptfs_opt_ecryptfs_sig:
sig_src = args[0].from;
rc = ecryptfs_add_global_auth_tok(mount_crypt_stat,
- sig_src);
+ sig_src, 0);
if (rc) {
printk(KERN_ERR "Error attempting to register "
"global sig; rc = [%d]\n", rc);
@@ -370,7 +370,8 @@ static int ecryptfs_parse_options(struct super_block *sb, char *options)
ECRYPTFS_SIG_SIZE_HEX] = '\0';
rc = ecryptfs_add_global_auth_tok(
mount_crypt_stat,
- mount_crypt_stat->global_default_fnek_sig);
+ mount_crypt_stat->global_default_fnek_sig,
+ ECRYPTFS_AUTH_TOK_FNEK);
if (rc) {
printk(KERN_ERR "Error attempting to register "
"global fnek sig [%s]; rc = [%d]\n",
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.